Carrier Ventilation Hood 62E User Manual

62E

Energy Recovery Ventilators

50 Hz

Installation, Start-Up and

Service Instructions

Page

CONTENTS

Wheel Drive Components . . . . . . . . . . . . . . . . . . . . . . . 37

Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Replacing the Throwaway Filters . . . . . . . . . . . . . . . . 37

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . .CL-1

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21

Step 1 — Inspect the Unit. . . . . . . . . . . . . . . . . . . . . . . . . . 6

Step 2 — Install Combination Roof Curb

(62EB-EU Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Step 3 — Install Drop in Damper Box

(62EB-EU Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Step 4 — Install Horizontal Base and Transition

(62EB-EU and 62E2-E7 Units) . . . . . . . . . . . . . . . . . . . . 7

Step 5 — Install Standard Roof Curb . . . . . . . . . . . . . . 14

• VERTICAL STAND-ALONE APPLICATIONS

• HORIZONTAL STAND-ALONE APPLICATIONS

Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . 16

Step 7 — Make Electrical Connections . . . . . . . . . . 17

• POWER SUPPLY

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should

install, repair, or service air-conditioning equipment.

Untrained personnel can perform the basic maintenance

functions of cleaning coils and filters and replacing filters. All

other operations should be performed by trained service

personnel. When working on air-conditioning equipment,

observe precautions in the literature, tags and labels attached to

the unit, and other safety precautions that may apply.

• ELECTRICAL CONNECTIONS

Follow all safety codes. Wear safety glasses and work

gloves. These instructions describe how to install, start up, and

service 62E energy recovery ventilator (ERV) units.

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-32

Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Rain Hoods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Energy Recovery Wheel. . . . . . . . . . . . . . . . . . . . . . . . . 22

• DRIVE BELT

WARNING

Electrical shock can cause personal injury and death. Shut

off all power to this equipment during installation. There

may be more than one disconnect switch. Tag all discon-

nect locations to alert others not to restore power until work

is completed.

• AIR SEALS

Airflow Settings and Adjustments. . . . . . . . . . . . . . . 22

• UNITS WITH EZERV CONROL OPTION

Operating Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

ComfortLink™ Interface Device . . . . . . . . . . . . . . . . . 27

Optional BACnet or LON Communications

Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

GENERAL

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-36

Removing and Installing Non-Segmented

Wheel for Cleaning (62EB,E7 Units). . . . . . . . . . . 32

Removing and Installing Non-Segmented Wheel

for Cleaning (62ECC and 62E2C Units). . . . . . . . 33

Removing Wheel Segments for Cleaning (62ECD,

62ED-EU, 62E2D, and 62E3-E6 Units) . . . . . . . . . 33

Installing Wheel Segments. . . . . . . . . . . . . . . . . . . . . . . 33

Wheel Drive Motor and Pulley Replacement

(62EC-EU and 62E2-E6 Units) . . . . . . . . . . . . . . . . . 34

Belt Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

• ALTERNATE BELT REPLACEMENT METHODS

Removing the Service Door . . . . . . . . . . . . . . . . . . . . . 35

Replacing a Blower (All ERV Cabinets Except

62EB and 62E7 Units) . . . . . . . . . . . . . . . . . . . . . . . . . 35

• EXHAUST SIDE

The 62E ERV units recover energy from building exhaust

air and pre-condition ventilation air. See Tables 1A-2B for unit

data. All 62EB-62EU units are configured for vertical dis-

charge (through the bottom). Vertical units may be installed on:

• a stand-alone roof curb

• a combination curb for direct coupled connection to a

rooftop unit

If horizontal supply and return is desired using a vertical

unit, the vertical unit may be installed on a horizontal supply/

return base.

NOTE: The horizontal supply/return base accessory includes a

roof curb. The horizontal supply/return base should NOT be

used with a stand-alone roof curb.

All 62E2-62E7 units are configured for horizontal discharge

(through the side). Horizontal units may be installed on a

stand-alone roof curb.

• SUPPLY SIDE

Replacing a Blower (62EB and 62E7

Size Cabinets). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

• EXHAUST OR SUPPLY SIDE

DIRECT COUPLED APPLICATIONS (Vertical) —

The

ERV unit can be installed directly coupled to a RTU (rooftop

unit). For vertical (through the roof) applications, the connec-

tion between the 62EB-62EU ERV unit and the RTU may be

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36,37

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Air Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53620007-01 Printed in U.S.A. Form 62E-C1SI Pg 1 8-10 Replaces: New

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Table 1A — Physical Data — SI (cont)

UNIT 62E

NOMINAL CAPACITY (L/s)

CAPACITY RANGE (L/s)

3585

4340

2830

5100

5200

6500

330-8260

5950

7080

1650-4250 2360-5665 1415-3540 2595-6845 2595-6370

2830-7315 3540-9440

MAXIMUM SHIPPING

WEIGHT (kg)

MAXIMUM OPERATING

WEIGHT (kg)

1232

1118

1308

1194

1397

1283

1397

1283

1482

1368

1482

1368

1533

1420

1608

1495

UNIT DIMENSIONS (mm)

Length (includes hoods)

Width

2355

2162

1687

2532

2339

1712

2685

2492

1737

2812

2619

1824

Height

ROTARY ENERGY

EXCHANGER

Type

Segmented

Size (Diam x Depth) (mm)

Nominal Drive Motor kW

SUPPLY/EXHAUST FANS

Type

1727 x 76

0.2

1880 x 76

0.2

2057 x 76

0.2

2184 x 76

0.2

Backward Inclined, Single Width Single Inlet

EC Motor with Integral Frequency Drive

Drive Type

Fan Option Code

(see fan option table)

F, G, L, M

F, G, M

G, M

F, G, M

G, M

FILTERS

Type

51 mm Pleated

Exhaust Air – Qty...Size

(L x W x D) (mm)

Outside Air – Qty...Size

(L x W x D) (mm)

6…406 x 635 x 51

6…457 x 635 x 51

6…508 x 508 x 51

8…508 x 610 x 51

UNIT 62E

NOMINAL CAPACITY (L/s)

CAPACITY RANGE (L/s)

6500

8000

7800

9400

8500

10250

9700

11800

3300-8025 4250-11325 3775-9450 5190-13685 4250-10380 5665-14630 4720-11800 6600-16990

MAXIMUM SHIPPING

WEIGHT (kg)

MAXIMUM OPERATING

WEIGHT (kg)

1974

1860

1974

1860

2126

2013

2126

2013

2486

2373

2486

2373

2486

2373

2486

2373

UNIT DIMENSIONS (mm)

Length (includes hoods)

Width

3015

2822

1824

3117

2924

1925

3294

3101

2068

3447

3251

2118

Height

ROTARY ENERGY

EXCHANGER

Type

Segmented

Size (Diam x Depth) (mm)

Nominal Drive Motor kW

SUPPLY/EXHAUST FANS

Type

Drive Type

Fan Option Code

(see fan option table)

2337 x 76

0.2

2515 x 76

0.2

2642 x 76

0.2

2794 x 76

0.2

Backward Inclined, Single Width Single Inlet

EC Motor with Integral Frequency Drive

H, K, J,

G, H, J, M,

G, H, J, N

H, J, K, N

K, J, N, P, R

H, K, J, N, P, R

N, P, R

FILTERS

Type

51 mm Pleated

Exhaust Air – Qty...Size

(L x W x D) (mm)

Outside Air – Qty...Size

(L x W x D) (mm)

10…508 x 508 x 51

8…610 x 610 x 51

8…635 x 635 x 51

LEGEND

DWDI — Double Width, Double Inlet

—

Electronically Commutated

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Table 1B — Physical Data — English

UNIT 62E

BA/7A

350

200-800

331

BC/7C

500

200-900

336

CC/2C

1000

500-1150

488

CD/2D

900

400-1100

502

CG/2G

1100

500-1400

502

DD/3D

1300

600-1600

627

DG/3G

1600

800-2000

627

NOMINAL CAPACITY (cfm)

CAPACITY RANGE (cfm)

MAXIMUM SHIPPING WEIGHT (lb)

MAXIMUM OPERATING WEIGHT (lb)

UNIT DIMENSIONS (in.)

Length (includes hoods)

Width

281

286

438

452

577

44.2/48.9

31.1/36.4

34.6/31.2

61.8/57.5

38.6/43.9

42.1/38.7

67.6/57.3

44.4/49.7

41.9/44.5

Height

ROTARY ENERGY EXCHANGER

Type

Monolithic

Segmented

Size (Diam x Depth) (in.)

Nominal Drive Motor Hp

SUPPLY/EXHAUST FANS

Type

19 x 1.0

0.09

19 x 2.0

0.09

25 x 2.0

0.09

25 x 3.0

0.09

30 x 3.0

0.09

Centrifugal DWDI

Direct

Backward Inclined, Single Width Single Inlet

EC Motor with Integral Frequency Drive

Drive Type

Fan Option Code

(see fan option table)

A, B

FILTERS

Type

2 in. Pleated

1…14 x 25 x 2

Exhaust Air – Qty...Size (L x W x D) (in.)

Outside Air – Qty...Size (L x W x D) (in.)

1...12 x 24 x 2

2…16 x 25 x 2

UNIT 62E

EB/4B

ED/4D

EF/4F

EG/4G

HB/5B

HD/5D

HF/5F

HG/5G

KD/6D

KG/6G

NOMINAL CAPACITY (cfm)

1,400

2,200

2,600

3,000

4,600

5,500

4,500

7,800

800-

1,800

1,100-

2,600

1,300-

2,700

1,300-

3,500

1,400-

3,600

2,200-

5,600

2,200-

5,400

3,000-

7,400

2,500-

5,500

4,000-

10,500

CAPACITY RANGE (cfm)

MAXIMUM SHIPPING

WEIGHT (lb)

MAXIMUM OPERATING

WEIGHT (lb)

1,120

1,070

1,158

1,108

1,120

1,070

1,158

1,108

1,739

1,689

1,771

1,721

1,739

1,689

1,771

1,721

2,550

2,300

2,550

2,300

UNIT DIMENSIONS (in.)

Length (includes hoods)

Width

85.5/70.8

54.6/59.9

50.5/54.7

103.9/80.1

67.0/72.3

55.9/67.1

114.5/86.1

77.6/82.9

61.9/77.7

Height

ROTARY ENERGY

EXCHANGER

Type

Segmented

52 x 1.5 52 x 3.0

Size (Diam x Depth) (in.)

Nominal Drive Motor Hp

SUPPLY/EXHAUST FANS

Type

36 x 1.5

1/6

36 x 3.0

1/6

36 x 1.5

1/6

36 x 3.0

1/6

52 x 1.5 52 x 3.0

1/6

64 x 3.0

1/4

1/6

Backward Inclined, Single Width Single Inlet

EC Motor with Integral Frequency Drive

Drive Type

Fan Option Code

(see fan option table)

C, E

E, F

E, F, L

E, F, L, M F, L, M

FILTERS

Type

Exhaust Air – Qty...Size

(L x W x D) (in.)

Outside Air – Qty...Size

(L x W x D) (in.)

2 in. Pleated

3…20 x 25 x 2

2…20 x 25 x 2

6…16 x 24 x 2

3…20 x 25 x 2

LEGEND

DWDI — Double Width, Double Inlet

EC Electronically Commutated

—

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Table 1B — Physical Data — English (cont)

UNIT 62E

NOMINAL CAPACITY (cfm)

7,600

9,200

6,000

10,800

11,000

13,800

12,600

15,000

5000-

5500-

7000-

6000-

7500-

CAPACITY RANGE (cfm)

3,500-9,000

2,715

3000-7500

3,079

12,000

14,500

13,500

17,500

15,500

20,000

MAXIMUM SHIPPING

WEIGHT (lb)

MAXIMUM OPERATING

WEIGHT (lb)

2,883

2,633

3,079

2,829

3,267

3,017

3,267

3,017

3,381

3,131

3,545

3,295

2,465

2,829

UNIT DIMENSIONS (in.)

Length (includes hoods)

Width

92.7

85.1

66.4

99.7

92.1

67.4

105.7

98.1

68.4

110.7

103.1

71.8

Height

ROTARY ENERGY

EXCHANGER

Type

Segmented

Size (Diam x Depth) (in.)

Nominal Drive Motor Hp

SUPPLY/EXHAUST FANS

Type

68 x 3.0

1/4

74 x 3.0

1/4

81 x 3.0

1/4

86 x 3.0

1/4

Backward Inclined, Single Width Single Inlet

EC Motor with Integral Frequency Drive

Drive Type

Fan Option Code

(see fan option table)

F, G, L, M

F, G, M

G, M

F, G, M

G, M

FILTERS

Type

2 in. Pleated

Exhaust Air – Qty...Size

(L x W x D) (in.)

Outside Air – Qty...Size

(L x W x D) (in.)

6…16 x 25 x 2

6…18 x 25 x 2

8…20 x 20 x 2

8…20 x 24 x 2

UNIT 62E

NOMINAL CAPACITY (cfm)

13,800

17,000

16,500

20,000

18,000

21,700

20,500

25,000

7,000-

17,000

9,000-

24,000

8,000-

20,000

11,000-

29,000

9,000-

22,000

12,000-

31,000

10,000-

25,000

14,000-

36,000

CAPACITY RANGE (cfm)

MAXIMUM SHIPPING

WEIGHT (lb)

MAXIMUM OPERATING

WEIGHT (lb)

4351

4101

4351

4101

4688

4438

4688

4438

5481

5231

5481

5231

5481

5231

5481

5231

UNIT DIMENSIONS (in.)

Length (includes hoods)

Width

118.7

111.1

71.8

122.7

115.1

75.8

129.7

122.1

81.4

135.7

128.0

83.4

Height

ROTARY ENERGY

EXCHANGER

Type

Segmented

Size (Diam x Depth) (in.)

Nominal Drive Motor Hp

SUPPLY/EXHAUST FANS

Type

Drive Type

Fan Option Code

(see fan option table)

92 x 3.0

1/3

99 x 3.0

1/3

104 x 3.0

1/3

110 x 3.0

1/3

Backward Inclined, Single Width Single Inlet

EC Motor with Integral Frequency Drive

H, K, J,

G, H, J, M,

G, H, J, N

H, J, K, N

K, J, N, P, R

H, K, J, N, P, R

N, P, R

FILTERS

Type

2 in. Pleated

Exhaust Air – Qty...Size

(L x W x D) (in.)

Outside Air – Qty...Size

(L x W x D) (in.)

10…20 x 20 x 2

8…24 x 24 x 2

8…25 x 25 x 2

LEGEND

DWDI — Double Width, Double Inlet

—

Electronically Commutated

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Table 2A — Supply/Exhaust Fan Options Physical Data — SI

FAN OPTION CODE

Wheels

Qty...Width (mm)

1…128 x 110

2…128 x 110

1…400

1…500

2…500

3…500

4…500

Nominal Motor kW

(per each fan)

0.45

0.88

2.70

FAN OPTION

CODE

Wheels

5…500

2.70

6…500

2.70

1…630

2.90

2…630

2.90

3…630

2.90

7…500

2.70

8…500

1…250

2.70

Qty...Width (mm)

Nominal Motor kW

(per each fan)

2.70

Table 2B — Supply/Exhaust Fan Options Physical Data — English

FAN OPTION CODE

Wheels

Qty...Width (in.)

1…5 x 4 1/8

2…5 x 4 1/8

1…15 3/4

1…19 3/4

2…19 3/4

3…19 3/4

4…19 3/4

Nominal Motor Hp

(per each fan)

0.61

1.18

3.62

FAN OPTION

CODE

Wheels

5…19 3/4

3.62

6…19 3/4

3.62

1…24 3/4

3.89

2…24 3/4

3.89

3…24 3/4

3.89

7…19 3/4

3.62

8…19 3/4

3.62

1…9 7/8

3.62

Qty...Width (in.)

Nominal Motor Hp

(per each fan)

DIRECT COUPLED APPLICATIONS (Horizontal) — For

horizontal applications (above the roof) using 62EB-EU units,

the horizontal supply/return base and transition accessories

may be used.

INSTALL DUCTWORK — Ductwork will be installed in the

curb for combination curb applications. The supply duct will

hang from the top of the curb. The return duct will attach to a

stub duct provided with the combination roof curb.

For horizontal applications using 62E2-E7 units, a standard

roof curb and transition accessories may be used.

NOTE: Ductwork must be installed before the RTU is set in

place.

INSTALL GASKETS — The combination curbs come with a

gasketing package to provide a seal between the RTU and ERV

units and the top perimeter of the combination curb. Install the

gasket around the top perimeter of the curb and around the sup-

ply and return opening. Gasket strips must fit tightly together,

leaving no gaps for leakage.

INSTALL ROOFING MATERIALS — Insulate and add a

cant strip to the combination curb. Follow suggested and ac-

ceptable roofing procedures for applying roofing materials.

The roofing material should extend up to the wood nailer and

be secured under the counter flashing. Follow all local, nation-

al, and industry roofing standards. Refer to Fig. 4 for roofing

recommendations.

INSTALLATION

Step 1 — Inspect the Unit — Inspect the unit; file a

claim with the shipping company if the unit is damaged. Check

the packing list to ensure that the correct items have been

received and notify your Carrier representative of any

discrepancy.

Step 2 — Install Combination Roof Curb

(62EB-EU Units) — For 62EB-EU units, the combina-

tion roof curb is a single curb that supports both the ERV and

RTU and has internal supply and exhaust air transitions. See

Fig. 1.

NOTE: For horizontal applications with 62E2-E7 units, a stan-

dard roof curb and horizontal transition can be used.

Step 3 — Install Drop-In Damper Box (62EB-

EU Units) — The drop-in damper box accessories are de-

signed to fit into the return air openings of the standard factory

curb of Carrier RTUs. The damper box provides connections

for return air from the conditioned space, exhaust air to the

ERV, and ventilation air from the ERV. The ERV would be in-

stalled on a stand-alone roof curb and field-supplied ductwork

would be run between the damper box and ERV curb. See

Fig. 5. The maximum length of the field-supplied duct is 100

equivalent feet.

LOCATE THE COMBINATION CURB — Prior to locat-

ing the combination curb, consider the structural support re-

quired for the rooftop system and the duct drop location in rela-

tion to the joists. Allow sufficient space for service, clearance,

and locations of vents or other sources of air. Refer to Fig. 2

and 3 for ERV clearance requirements. Refer to the rooftop in-

stallation instructions for more information regarding location

considerations.

PREPARE ROOF CURB LOCATION — Cut a hole in the

roof for duct openings. Your local Carrier sales representative

can provide dimensional drawing for the combination curb.

See this drawing for duct opening dimensions. Frame the open-

ing to provide adequate structural support.

SET THE COMBINATION CURB — Set the combination

curb over the roof opening. Level the curb by placing shims

under the bottom flange of the curb. Secure the curb in place by

welding or fastening the curb to the roof.

LOCATE THE ERV ROOF CURB — Prior to locating the

ERV roof curb consider the structural support required for the

rooftop system, the duct drop location in relation to the joists,

and the 100 equivalent foot duct length limitation between the

ERV and RTU. Allow sufficient space for service, clearance,

and locations of vents or other sources of air. Refer to Fig. 2

and 3 for ERV clearance requirements. Refer to the rooftop in-

stallation instructions for more information regarding location

and installation considerations for the RTU curb.

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ASSEMBLE THE ERV ROOF CURB — Connect the curb

side and the curb end. Insert the tabs on the curb end into the

slots on the curb sides. See Fig. 6. Press firmly until the pieces

lock into place. It may be necessary to exert additional force on

top of the curb to lock the pieces in place. Ensure the curb piec-

es are locked together prior to proceeding further. Repeat for

other corners of the roof curb.

NOTE: If lifting or moving the roof curb assembly, hammer

the tabs over 90 degrees.

PREPARE ROOF CURB LOCATION — Cut a hole in the

roof for duct openings. See Fig. 7 for duct opening dimensions.

Frame the opening to provide adequate structural support.

SET THE ERV ROOF CURB — Fit the roof curb assembly

by measuring across the corners of the curb to ensure a square

fit. Set the roof curb over the roof opening. Level the curb by

placing shims under the bottom flange of the curb. Secure the

curb in place by welding or fastening the curb to the roof.

INSTALL DUCTWORK — Ductwork will be installed in the

ERV roof curb for applications utilizing the drop-in damper

box. The duct will hang from the top of the curb. Refer to

Fig. 7 to determine the duct size required. Provide field-

manufactured duct and place into the supply and return open-

ings in the curb.

roofing procedures for applying roofing materials. The roofing

material should extend up to the wood nailer and be secured

under the counter flashing. Follow all local, national, and in-

dustry roofing standards. Refer to Fig. 4 for roofing recommen-

dations.

INSTALL DROP-IN DAMPER BOX — Place the damper

box into the RTU curb. Allow the damper box flanges to rest

on the curb. Secure the damper box in place with 1-in. self-tap-

ping screws. Install ductwork to connect the damper box to the

ERV curb. The upper damper box connection must be ducted

to the ERV supply air, and the lower damper box connection

must be ducted to the ERV exhaust air. See Fig 5. Refer to the

drop-in damper box dimensional sheets to determine the duct

size required. Your local Carrier sales representative can pro-

vide you with this dimensional data.

Step 4 — Install Horizontal Base and Transi-

tion (62EB-EU and 62E2-E7 Units) — The hori-

zontal transition accessory is used to connect the ERV to the

horizontal return of a Carrier rooftop unit. To provide horizon-

tal exhaust and ventilation air connections on 62EB-EU units,

the horizontal base accessory must also be installed. The acces-

sory is not needed on 62E2-E7 units. The rooftop unit must be

installed on a standard 14 in. high roof curb and positioned at a

specific distance relative to the ERV base. A typical arrange-

ment is shown in Fig. 8 and 9. See Fig. 10 for 62E2-E7 unit di-

mensions. Your local Carrier sales representative can provide

you with dimensional data for the appropriate Carrier RTU and

62E model installation.

NOTE: Ductwork must be installed in the ERV curb before the

ERV unit is set in place.

NOTE: Drop-in damper box must be installed in the RTU curb

before the RTU is set in place.

INSTALL GASKETS — The ERV roof curbs come with a

gasketing package to provide a seal between the ERV unit and

the top perimeter of the roof curb. Install the gasket around the

top perimeter of the curb and around the supply and return

opening. Gasket strips must fit tightly together, leaving no gaps

for leakage.

LOCATE THE ROOF CURB — Prior to locating the roof

curb consider the structural support required for the rooftop

system. Allow sufficient space for service, clearance, and loca-

tions of vent or other sources of air. Refer to Fig. 2, 3, and 10

for ERV clearance requirements. Refer to the rooftop installa-

tion instructions for more information regarding location

considerations.

Proper location of the roof curb in relationship to the RTU

roof curb is critical for proper fit of the horizontal transition.

See Fig. 8 and 9. Refer to the ERV unit submittals provided by

your local Carrier sales representative for the correct

dimensions.

IMPORTANT: Gasket installation is critical for water

integrity. Improperly installed gaskets can result in air or

water leaks, leading to poor unit performance.

INSTALL ROOFING MATERIALS — Insulate and add a

cant strip to the roof curb. Follow suggested and acceptable

LEGEND

ERV

RTU

— Energy Recovery Ventilator

— Rooftop Unit

NOTES:

1. Return air ductwork sits 12 in. below bottom of

curb. (Stub duct provided.)

2. Dimensions shown in inches.

Fig. 1 — Typical Combination Curb

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Fork Pockets (Remove Before Installing on Curb)

LEFT SIDE

a62-330

TOP VIEW

DIMENSIONS (in.)

62E UNIT

TYPE

31.138

38.625

44.425

54.625

67.045

77.625

36.000

18.000

20.000

27.000

36.000

45.000

55.000

65.000

75.000

37.645

45.183

45.043

53.562

59.022

64.972

34.559

42.078

41.938

50.458

55.918

61.868

5.850

8.916

11.677

5.757

35.076

43.875

49.675

59.875

72.294

82.875

24.971

32.471

38.271

48.495

60.915

71.495

11.801

15.485

18.260

22.997

29.207

34.247

14.239

19.165

25.164

DIMENSIONS (mm)

62E UNIT

TYPE

791

914

457

508

686

914

956

878

149

226

297

146

362

487

639

891

634

300

393

464

584

742

870

981

914

1148

1144

1360

1499

1650

1069

1065

1282

1420

1571

1114

1262

1521

1836

2105

825

1128

1387

1703

1972

1143

1397

1651

1905

972

1232

1547

1816

NOTES:

1. Clearance above cabinet is 24 inches (610 mm).

2. All dimensions shown in inches.

Fig. 2 — 62EB-62EK Vertical Unit Cabinet Dimensions

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Fork Pockets (Remove Before Installing on Curb)

LEFT SIDE

a62-331

TOP VIEW

DIMENSIONS (in.)

62E UNIT

TYPE

82.750

89.750

95.750

100.750

108.750

112.750

119.750

125.625

30.000

32.000

85.000

95.000

97.000

105.000

115.000

122.000

125.000

85.536

92.536

98.536

103.536

111.536

115.536

122.536

130.875

76.471

83.471

89.471

94.471

102.471

106.471

113.471

119.495

36.985

40.485

43.485

45.985

49.985

51.985

55.485

58.497

69.500

70.500

71.500

74.910

78.910

84.490

86.510

66.396

67.396

68.396

71.806

75.806

81.386

83.405

85.076

92.747

99.747

105.747

110.747

118.747

122.747

129.747

135.727

92.076

98.076

103.076

111.076

115.076

122.076

127.971

DIMENSIONS (mm)

62E UNIT

TYPE

2102

2280

2432

2559

2762

2864

3042

3191

762

813

2159

2413

2464

2667

2921

3099

3175

2173

2350

2503

2630

2833

2935

3112

3324

1942

2120

2273

2400

2603

2704

2882

3035

937

1765

1791

1816

1903

2004

2146

2197

1686

1712

1737

1824

1925

2067

2118

2161

2339

2491

2618

2821

2923

3101

3250

2356

2534

2686

2813

3016

3118

3296

3447

1028

1105

1168

1270

1320

1409

1486

NOTES:

1. Clearance above cabinet is 36 inches (915 mm).

2. All dimensions shown in inches.

Fig. 3 — 62EL-62EU Unit Cabinet Dimensions

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A62-247ef

GASKETING

ROOF CURB

NAIL*

RIGID

INSULATION*

FLASHING*

CANT STRIP*

ROOF FELT*

ROOF DECK*

ROOF*

*Field provided.

Fig. 4 — Roofing Materials — Recommendation

a62-376.eps

NOTE: All dimensions shown in inches.

Fig. 5 — Typical Installation with Drop-in Damper Box

A62-246ef

END

SIDE

Fig. 6 — Assembling the Roof Curb

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"A"

I.D.

"B"

TYP. 2X

"C"

TYP. 2X

"A"

I.D.

a62-377

14.000

NOTES:

1. All dimensions shown in inches.

2. Nailer sits even with top of curb. Do not cover any existing holes with nailer.

62E

UNIT

TYPE

62E

UNIT

TYPE

DIMENSION DIMENSION DIMENSION

A (in.)

B (in.)

C (in.)

A (in.)

B (in.)

C (in.)

27.221

34.721

40.521

50.721

63.141

73.721

78.721

24.721

32.221

38.021

48.221

60.641

71.221

76.221

10.861

14.611

17.511

22.611

28.821

34.111

36.611

85.721

91.721

83.221

89.221

40.111

43.111

45.611

49.611

51.611

55.111

58.111

96.721

94.221

104.721

108.721

115.721

121.721

102.221

106.221

113.221

119.221

62E

UNIT

TYPE

62E

UNIT

TYPE

DIMENSION DIMENSION DIMENSION

A (mm)

B (mm)

C (mm)

A (mm)

B (mm)

C (mm)

691

882

628

818

276

371

445

574

732

866

930

2177

2330

2457

2660

2762

2939

3092

2114

2266

2393

2596

2698

2876

3028

1019

1095

1159

1260

1311

1400

1476

1029

1288

1604

1873

2000

966

1225

1540

1809

1936

Fig. 7 — 62EB-62EU Unit Curb Dimensions

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a62-378

25.00

NOTE: All dimensions shown in inches.

Fig. 8 — Typical 62EB-EU Unit Installation with Horizontal Base and Horizontal Transition

RETURN AIR OPENING

ENERGY RECOVERY UNIT

HVAC UNIT

HORIZONTAL

TRANSITION

a62-443

SUPPLY OPENING

Fig. 9 — Typical 62E2-E7 Unit Installation

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FIELD TERMINAL STRIP

ACCESS

OUTSIDE AIR

HOOD

"D"

DUCT O.D.

WHEEL AND FILTER

ACCESS

EXHAUST

HOOD

DUCT CONNECTION

SPACE

ROOF CURB

SEE NOTE 3

"C"

"A"

"B"

CLEARANCE

DISCONNECT

LOCATION

OUTSIDE AIR

HOOD

"E"

36.000

CLEARANCE

EXHAUST

HOOD

DUCT CONNECTION

SPACE IF NO HOODS

ROOF CURB

"F"

"I"

"J"

"D" - 2.000

DUCT I.D.

"K"

DUCT I.D.

S/A

"D"

DUCT O.D.

"G"

"H"

"K"

DUCT I.D.

R/A

ONLY DUCT SLEEVE AND

ERV AIR DIVIDER SHOWING

DIMENSIONS (in.)

62E UNIT TYPE

36.000

18.000

24.000

18.000

36.000

40.000

50.000

64.000

75.000

1.869

1.179

3.795

4.238

4.516

9.542

28.995

36.495

42.295

52.495

64.915

75.495

31.734

39.171

44.847

55.066

67.486

78.066

36.375

43.875

49.675

59.875

72.295

82.875

32.176

39.663

45.463

55.673

68.093

78.673

31.186

38.673

44.473

54.673

67.093

77.673

11.984

16.215

21.132

27.131

36.905

41.239

41.099

49.631

53.013

58.963

12.813

16.497

19.272

23.997

30.207

35.247

DIMENSIONS (mm)

62E UNIT TYPE

914

457

610

457

914

736

806

924

817

1007

1155

1414

1730

1998

792

304

412

537

689

937

325

419

490

610

767

895

914

927

995

1114

1262

1521

1836

2105

982

1047

1044

1261

1347

1498

1016

1270

1626

1905

1074

1333

1649

1918

1139

1399

1714

1983

1130

1389

1704

1973

108

115

242

NOTES:

1. Clearance above cabinet is 24 in. (610 mm).

2. Dimensions are in inches.

3. Size the roof curb to allow for a clearance of 10-in. (254 mm) (minimum) between

the bottom of the exhaust hood and the top of the insulated roof material.

Fig. 10 — 62E2-62E7 Unit Cabinet Dimensions

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ASSEMBLE THE ROOF CURB — Connect the curb side

and the curb end. Insert the tabs on the curb end into the slots

on the curb sides. See Fig 6. Press firmly until the pieces lock

in to place. It may be necessary to exert additional force to the

top of the curb to lock the pieces in place. Ensure the curb piec-

es are locked together prior to proceeding. Repeat for other cor-

ners of the roof curb. See Fig. 7 and 11 for roof curb dimen-

sions.

NOTE: If lifting or moving the roof curb assembly hammer

the tabs over 90 degrees.

"D"

"C"

ERV RAIL SITS DOWN

IN CHANNEL

.500

"B" I.D.

.941

DETAIL B

SCALE 1 : 3

SECTION A-A

14.559

"A"

"E"

DIMENSIONS (mm)

DIMENSIONS (in.)

62E UNIT

TYPE

62E UNIT

TYPE

718

258

354

428

557

715

849

797

938

859

28.286 10.143 31.397 36.927 33.816

35.882 13.941 38.993 40.446 37.335

41.682 16.841 44.793 40.306 37.195

51.882 21.941 54.993 48.826 45.715

64.302 28.151 67.413 54.286 51.175

74.882 33.441 77.993 60.236 57.125

911

990

1027

1024

1240

1379

1530

948

1059

1318

1633

1902

1138

1397

1712

1981

945

1161

1300

1451

a62-442

NOTE: Dimensions are in inches.

Fig. 11 — 62E2-62E7 Unit Roof Curb Dimensions

Apply the factory provided gasketing material to the top of

the horizontal base. Follow the rigging directions in the

Step 6 — Rig and Place Unit section to place the ERV on the

horizontal base. Position the ERV so that the ERV's LCD (liq-

uid crystal diode) display is on the opposite side of the horizon-

tal base's duct openings. Secure the ERV to the horizontal base

using 1-in. self-tapping sheet metal screws every 18 in. around

the perimeter.

NOTE: The ERV may also be mounted to the horizontal base

prior to being set on the roof curb.

Install Ductwork — Ductwork will be connected to the hori-

zontal box (62EB-EU units) or directly to the ERV (62E2-E7

units) for stand-alone horizontal discharge and exhaust applica-

tions. See Fig. 12 for the horizontal box connection dimen-

sions. See Fig. 10 for 62E2-E7 connection dimensions. Do not

support the duct from the horizontal box. Provide field

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manufactured duct and attach to the supply and exhaust open-

ings on the horizontal box.

Spreader bars must be positioned to prevent cables from rub-

bing against the ERV unit.

Step 6 — Rig and Place Unit — To transfer the unit

from the shipping platform to the storage or installation site, re-

fer to the rigging label on the unit and these instructions.

WARNING

Never attempt to lift the ERV in any way that does not use

all four (4) eyehooks. Lifting the unit with an uneven distri-

bution of the weight may cause damage to the unit and/or

personal injury or death.

CAUTION

All panels must be in place when rigging. Unit is not

designed for handling by fork truck. Damage to unit may

result.

IMPORTANT: Remove the fork pockets from the ERV

unit before setting it on the roof curb.

Refer to Tables 1A and 1B for ERV unit weights. Check lift-

ing devices for capacity constraints.

Hook rigging shackles through the eyehooks in the ERV

unit. Connect lifting straps and spreader bars. See Fig 13.

Carefully lift the ERV unit and set on ERV roof curb. Do

not drop the ERV unit onto the roof curb, as damage may oc-

cur. Avoid twisting or uneven lifting of the unit. Never lift the

unit by the hoods or any means other than the provided lifting

holes or eyes.

FORK POCKETS (REMOVE

BEFORE INSTALLING ON CURB)

DIMENSIONS (in.)

62E UNIT

TYPE

27.221

34.721

40.521

50.721

63.141

72.721

78.721

85.721

91.721

96.721

12.111

15.861

18.761

23.861

30.071

34.861

37.861

41.361

44.361

46.861

8.750

14.000

18.000

21.000

24.000

26.022

31.011

33.052

22.604

26.600

29.604

32.604

34.637

39.615

41.682

12.500

15.400

20.500

26.710

31.500

34.500

38.000

41.000

43.500

on the ERV field control terminal strip. This will enable the

ERV to turn on and run.

EYE HOOK

(HIDDEN)

If the HVAC unit has an integrated economizer or power ex-

haust, it is sometimes necessary to provide an interface be-

tween the HVAC unit and the ERV controls to ensure proper

operation of the ERV’s supply/exhaust fan and energy recovery

wheel motors. The 62E has discrete inputs for this purpose and

damper end switches or relays may be used to coordinate the

economizer and power exhaust operation with the ERV.

EYE HOOK

When an ERV is mated to an electro-mechanical rooftop

unit with an economizer and a power exhaust, terminals C and

G on the ERV field control terminal strip are still connected to

the corresponding terminals on the rooftop unit cabinet (jumper

across R and G needs to be removed). However, in addition,

field supplied and installed end switches are required to coordi-

nate operation with the unit. For unit economizer operation, it

is necessary to install an Normally Open end switch (field pro-

vided) on the economizer actuator and connect to terminals 5

and 6 (ERV Shutdown) on the ERV terminal strip. This will

cause the ERV to shut down during unit economizer operation.

For power exhaust, based on building pressure control, no ad-

ditional ERV wiring is required, however if the ERV is to pro-

vide power exhaust functionality then a field-installed Normal-

ly Closed end switch is required to be installed between termi-

nals 7 and 8 on the ERV terminal strip.

a62-380

EYE HOOKS

FORK POCKETS

Fig. 13 — Rigging and Handling

Step 7 — Make Electrical Connections

WARNING

Prior to performing service or maintenance operations on

the ERV unit, turn off and disconnect all power switches to

the unit. Be aware that there may be more than one discon-

nect switch. Electrical shock could cause serious personal

injury or death.

High Voltage Wiring — Connect high voltage wiring to the

disconnect, see Fig. 14. Route the power wires in water tight

conduit from the disconnect switch box to the ERV distribution

block. To gain access to high voltage block, remove panel

marked with label stating, “High voltage terminal block locat-

ed behind this panel.”

IMPORTANT: Only trained, qualified installers and ser-

vice technicians should install, wire, start-up and service

equipment.

Table 3 — ERV Wheel Motor and Control

Transformer Electrical Data

CONTROL

POWER SUPPLY — The electrical characteristics of the

available power supply must agree with the unit nameplate

rating. Supply voltage must be within the limits shown. See Ta-

bles 3-5 for electrical and configuration data.

ELECTRICAL CONNECTIONS — The ERV unit must

have its own electrical disconnect box. If the disconnect option

has not been ordered from the factory, it must be field supplied

and installed per local codes. See Tables 3-5.

ERV WHEEL MOTOR

UNIT

V-Ph

TRANSFORMER

UNIT

V-Ph

115-1

230-1

230-3

460-3

575-3

230-3

460-3

575-3

230-3

460-3

575-3

230-3

460-3

575-3

80.5

FLA

0.70

0.30

0.15

0.12

0.30

0.15

0.12

0.30

0.15

0.12

1.04

0.52

0.30

0.75

0.38

0.30

2.50

1.20

0.95

3.40

1.70

1.40

FLA

0.65

0.33

0.16

0.13

0.33

0.16

0.13

0.33

0.16

0.13

0.33

0.16

0.13

0.33

0.16

0.13

0.33

0.16

0.13

0.33

0.16

0.13

115-1

230-1

230-3

400-3

460-3

575-3

230-1

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

69.0

62EB,E7

69.0

If the ERV unit has an electric pre-heater factory installed, it

will be wired through the ERV unit disconnect.

69.0

62EC,E2

69.0

Low Voltage Wiring — Wire low voltage per Fig. 14. The

field connection terminal strip is located behind the panel that

is adjacent to the control box. The correct panel is marked with

a green label stating “Attention: For field control of ERV, re-

move this panel to gain access to ERV field control terminal

strip.” The wires connecting to the field terminal strip can be

69.0

62ED,E3

62EE,E4

62EH,E5

69.0

routed through the nearest /₄-in. hole and through conduit to

138.3

99.7

the RTU, or they can be routed down the sidewall of the cabi-

net using the wire pull provided and routed through the combi-

nation curb to the RTU.

99.7

101.0

99.7

CAUTION

When routing wires in the ERV always keep them away

from moving parts and sharp metal edges. Follow all local

and state codes when routing the ERV control wires.

332.4

319.1

315.8

452.0

465.3

62EK,EL,EM,

EN,EP,E6

If the ERV unit is mated to a RTU, terminals C and G on the

field control terminal strip of the ERV unit are connected to the

corresponding terminals on the RTU cabinet. Verify the jumper

is removed from the “ERV R” and “G” terminals; not doing so

may damage RTU control equipment.

When the ERV is to be run as a stand-alone configuration,

verify that a jumper is shorting the “ERV R” and “G” terminals

62ER,ES,

ET,EU

LEGEND

FLA

—

Full Load Amps

—

Watts

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Table 4 — Supply and Exhaust Fans Electrical Data

FAN MOTOR

FAN

OPTION

62E

CHASSIS

UNIT

V-Ph

115-1

230-1

200-1

230-1

115-1

230-1

230-3

460-3

230-3

460-3

230-3

460-3

230-3

460-3

230-3

460-3

230-3

460-3

230-3

460-3

230-3

460-3

230-3

460-3

FLA

3.96

1.74

0.87

0.70

3.96

1.98

0.99

0.79

1.72

2.21

1.11

0.88

2.21

1.11

0.88

6.79

3.39

2.71

6.79

3.39

2.71

6.79

3.39

2.71

6.79

3.39

2.71

6.79

3.39

2.71

6.79

3.39

2.71

7.29

3.64

2.92

Qty

115-1

230-1

230-3

460-3

575-3

115-1

230-1

230-3

400-3

460-3

575-3

230-1

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

455

400

455

395

880

B,7

C,2

880

D,E,3,4

880

2700

2900

E,H,K,

4,5,6

H,K,L,

M,N,P,

4,6

L,M,N,

P, R

R,S,

T,U

R,S,

T,U

S,T,U

H,K,L

LEGEND

FLA — Full Load Amps

Qty — Quantity

— Watts

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Table 4 — Supply and Exhaust Fans Electrical Data (cont)

FAN MOTOR

FAN

62E

UNIT

V-Ph

OPTION

CHASSIS

V-Ph

230-3

460-3

230-3

460-3

230-3

460-3

230-3

460-3

FLA

7.29

3.64

2.92

7.29

3.64

2.92

6.79

3.39

2.71

6.79

3.39

2.71

Qty

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

2900

2700

K,L,M,

N,P,R

R,S,

T,U

LEGEND

FLA — Full Load Amps

Qty — Quantity

— Watts

Table 5 — Electric Heat Electrical Data

HEATER

UNIT AND HEATER

V-Ph

62E CHASSIS

FLA

17.39

8.70

5.03

2.51

115-1

230-1

230-3

400-3

460-3

575-3

115-1

230-1

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

B,7

B,C,2,7

B,C,D,E,2,3,4,7

B,7

2.01

43.48

21.74

12.57

6.28

5.03

20.11

10.05

8.04

25.13

12.57

10.05

37.70

18.85

15.08

50.26

25.13

20.11

B,C,2,7

B,C,D,E,H,2,3,4,5,7

D,E,H,3,4,5

E,H,K,L,4,5,6

H,K,L,M,N,5,6

H,K,L,M,N,P,5,6

LEGEND

FLA — Full Load Amps

— Watts

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Table 5 — Electric Heat Electrical Data (cont)

HEATER

UNIT AND HEATER

62E CHASSIS

V-Ph

FLA

62.83

31.42

25.13

75.40

37.70

30.16

87.96

43.98

35.18

100.53

50.26

40.21

113.09

56.55

45.24

125.66

62.83

50.26

138.23

69.11

55.29

150.79

75.40

60.32

163.36

81.68

65.34

175.92

87.96

70.37

188.49

94.24

75.40

201.06

100.53

80.42

213.62

106.81

85.45

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

230-3

400-3

460-3

575-3

H,K,L,M,N,P,R,S,5,6

K,L,M,N,P,R,S,T,U,6

L,M,N,P,R,S,T,U

M,N,P,R,S,T,U

N,P,R,S,T,U

P,R,S,T,U

R,S,T,U

S,T,U

T,U

LEGEND

FLA — Full Load Amps

— Watts

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ERV OPTION BOARD #2

ERV OPTION BOARD #1

Fig. 14 — Typical Wiring Schematic

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cassette through the wheel center. Tighten the screws so the air

seals tug slightly on the sheet of paper as the wheel is turned.

Re-check the air seals for tightness after adjustment.

START-UP

Use the following information to check unit PRIOR to start-up.

Replace the access door and apply power. Check that the

wheel rotates freely. If the wheel does not rotate or is binding,

remove the cassette and adjust.

For units with three phase power only: Remove the ser-

vice door to make sure the wheel is turning in the same direc-

tion as the sticker next to the motor shows. See Fig. 15. If the

wheel is turning in the wrong direction turn, off the disconnect

switch and have a qualified electrician swap any 2 of the power

leads on the load side of the disconnect switch.

CAUTION

Before turning the disconnect switch on, verify that the

voltage being provided to the ERV unit matches the volt-

age shown on the ERV nameplate. Failure to do so could

result in equipment damage.

Unit Preparation — Check that the unit has been in-

stalled in accordance with these installation instructions and all

applicable codes.

Check all fasteners and set screws for tightness. Verify that

all of the panels are in place and secure. Verify that any open-

ings to the ERV cabinet are clear of foreign materials.

Airflow Settings and Adjustments — With the

disconnect on, the display should show "ERV FAN SPEED"

on the top line of the display. The bottom line of the display

should show "OA=XXX EX=XXX" where the “X”s represent

the blower output percentage for the outside air blowers and

the exhaust air blowers.

Internal Wiring — Check all electrical connections in the

control box. Tighten as required.

NOTE: If any of the alarms are tripped, the LCD display will

scroll between the alarms and the normal display.

Rain Hoods — The outside air hood will include alumi-

num water entrainment filters, which should be in place prior

to starting the unit.

To measure the airflow the ERV units have factory-installed

airflow test ports, which allow the balancer of the job to easily

measure the static pressure across the ERV wheel. The static

pressure is measured on both the supply and return sides of the

wheel. Take this pressure reading and match up the wheel dif-

ferential pressure ( P) to pressure chart to display the cfm that

is flowing through the ERV wheel. See Table 6.

To balance the airflow remove the small panel next to the

control panel cover to access the user input controls. Press the

push button and turn the knob clockwise to increase or counter-

clockwise to decrease the outside air blower speed (use the test

ports and charts described above to calculate cfm levels). Press

the push button again to change the exhaust air blower speed.

Press the button again to return to the main screen. Replace the

user control cover when ERV cabinet is operating at the correct

blower speeds.

Energy Recovery Wheel

DRIVE BELT — Turn the energy recovery wheel by hand to

verify free operation. Inspect the belt, which drives the energy

wheel rotation. Make sure the belt rides smoothly through the

pulley and over the wheel rim.

AIR SEALS — Check that the air seals located around the

outside of the wheel and across the center, on both sides of the

wheel, are secure and in good condition. Air seals which are

too tight will prevent proper rotation of the energy recovery

wheel.

Air seal clearance may be checked by placing a sheet of pa-

per, like a feeler gage, against the wheel face. To adjust the air

seals, loosen all eight seal retaining screws. These screws are

located on the bearing support that spans the length of the

a62-383.eps

Fig. 15 — ERV Wheel Rotation

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Table 6 — Airflow vs. Pressure Drop Across ERV Wheel

62E UNIT

BA,7A

AIRFLOW VS. PRESSURE DROP ACROSS ERV WHEEL

l/s

118 142 165 189 212 236 260 283 307 330 354

62 77 95 109 127 142 157 174 189 207 221

118 142 165 189 212 236 260 283 307 330 354

75 90 104 119 134 149 164 179 194 209 224

378

239

378

239

519

261

472

261

566

251

—

425

1.08

—

661

296

—

401

254

543

274

496

274

590

261

—

BC,7C

CC,2C

CD,2D

CG,2G

DD,3D

DG,3G

EB,4B

ED,4D

236 260 283 307 330 354 378 401 425 448 472 496

112 124 137 149 162 174 187 199 211 224 236 249

189 212 236 260 283 307 330 354 378 401 425 448

112 124 137 149 162 174 187 199 211 224 236 249

283 307 330 354 378 401 425 448 472 496 519 543

112 124 137 147 159 169 182 194 204 216 229 239

—

519

286

614

274

—

543

299

637

286

—

283 330 378 425 472 519 566 614 661 708 755

114 132 149 167 184 199 216 234 251 269 286

—

425 472 519 566 614 661 708 755 802 850 897 944

117 132 149 164 179 197 211 226 244 259 274 291

—

378 425 472 519 566 614 661 708 755 802 850

164 177 192 207 221 234 249 264 276 291 306

—

1133

—

1180

—

1227

519 566 614 661 708 755 802 850 897 944 991 1038 1086

NOTE: Pressure sensing ports are provided on both sides of the

ERV wheel for testing and balancing.

Table 6 — Airflow vs. Pressure Drop Across ERV Wheel (cont)

62E

UNIT

AIRFLOW VS. PRESSURE DROP ACROSS ERV WHEEL

l/s

1652 1888 2124 2360 2596 2832 3068 3304 3540 3776 4012 4248 4484

—

114

129

147

162

179

194

211

226

244

261

276

294

304

2360 2832 3068 3304 3540 3776 4012 4248 4484 4720 4956 5192 5428 5664 5900 6136 6372

122

2124 2360 2596 2832 3068 3304 3540 3776 4012 4248 4484 4720 4956 5192

124 139 152 167 179 194 207 221 234 249 264 276 291 304

144

154

164

177

187

197

209

219

229

239

251

261

271

284

—

294

—

304

—

2832 3304 3776 4248 4720 4956 5192 5428 5664 5900 6136 6372 6608 6844 7080 7316 7552

124 142 162 179 197 207 216 224 234 244 251 261 271 279 289 299 306

2596 2832 3068 3304 3540 3776 4012 4248 4484 4720 4956 5192 5428 5664 5900 6136 6372

124

3540 4012 4484 4956 5428 5900 6372 6844 7316 7788 8260 8732 9204

127 142 157 172 187 202 216 231 246 261 276 291 306

137

147

159

169

182

192

204

214

226

239

249

261

271

—

284

—

294

—

306

—

2832 3304 3776 4012 4248 4484 4720 4956 5192 5428 5664 5900 6136 6372 6608 6844 7080

119

3776 4248 4720 5192 5664 6136 6608 7080 7552 8024 8496 8968 9440 9912 10384

119 134 147 159 172 187 199 211 226 239 251 264 279 291 304

139

159

169

179

189

199

209

219

229

239

249

259

269

279

289

—

299

—

3304 3776 4248 4720 5192 5428 5664 5900 6136 6372 6608 6844 7080 7316 7552 7788 8024

127

4248 4720 5192 5664 6136 6608 7080 7552 8024 8496 8968 9440 9912 10384 10856 11328

122 134 147 159 169 182 194 207 216 229 241 254 266 276 289 301

144

162

182

199

209

216

226

234

244

254

264

271

281

289

299

309

—

3776 4248 4720 5192 5664 6136 6372 6608 6844 7080 7316 7552 7788 8024 8260 8496 8732

122 137 152 167 182 197 204 211 219 226 234 241 249 256 264 271 279

5192 6136 7080 7552 8024 8496 8968 9440 9912 10384 10856 11328 11800 12272 12744 13216 13688

124

4248 4720 5192 5664 6136 6608 7080 7552 8024 8496 8968 9440 9912 10384

127 139 154 167 182 197 209 224 236 251 266 279 294 306

144

164

174

184

194

204

214

224

234

244

254

264

274

284

—

294

—

304

—

5664 6608 7552 8496 8968 9440 9912 10384 10856 11328 11800 12272 12744 13216 13688 14160 14632

124

4720 5192 5664 6136 6608 7080 7552 8024 8496 8968 9440 9912 10384 10856 11328 11800

100 134 147 159 172 184 197 207 219 231 244 256 269 281 294 306

144

162

182

189

199

209

216

226

236

246

254

264

274

281

291

301

—

6608 7552 8496 9440 10384 11328 11800 12272 12744 13216 13688 14160 14632 15104 15576 16048 16520

127

144

159

177

192

209

216

224

231

241

249

256

264

274

281

289

296

NOTE: Pressure sensing ports are provided on both sides of the

ERV wheel for testing and balancing.

UNITS WITH EZERV CONTROL OPTION — With

the EzERV option, the LCD display will change to show the

amount of air moving through the cabinet in cubic feet per

minute (cfm). The screen is divided into two columns: The left

column showing the amount of outside air (Osa/CFM) and the

right column showing the exhaust air (Ext/CFM). To adjust the

fan speeds, remove the small panel next to the control panel

cover to access the user input controls. See Fig. 16.

Fig. 17 — ERV Cfm Screen

a62-385.eps

Offset Air Option — Press the push button once to bring up

the outside air cfm screen. Turn the knob clockwise to increase

or counterclockwise to decrease the amount of outside air com-

ing into the building. See Fig. 18.

a62-384.eps

Fig. 16 — LCD Display

Balanced Air Option — Press the push button once to bring

up the ERV cfm screen. Turn the knob clockwise to increase or

counterclockwise to decrease the amount of outside air coming

into the building. See Fig. 17. The exhaust airflow will auto-

matically adjust to equal the supply airflow. Press the button

again to return to the main screen. Replace the user control

cover.

-386.eps Fig. 18 — Outside Air Cfm Screen

Press the push button again to bring up the exhaust air offset

screen. A negative exhaust air offset would equate to a smaller

amount of air being exhausted from the building when com-

pared to the outside air being supplied to the building. Adjust

the knob clockwise to increase and counterclockwise to de-

crease the exhaust offset cfm level. See Fig. 19. Press the

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button again to return to the main screen. Replace the user con-

trol cover.

exhaust air offset screen. A negative exhaust air offset would

equate to a smaller amount of air being exhausted from the

building when compared to the outside air being supplied to the

building. Adjust the knob clockwise to increase and counter-

clockwise to decrease the exhaust offset cfm level. Press the

button again to return to the main screen. Replace the user con-

trol cover.

Building Pressure Control Option — This option will hold

the outside air cfm level constant and will modulate the exhaust

airflow to maintain the building pressure set point. Press the

push button once to bring up the ERV cfm screen. Turn the

knob clockwise to increase or counterclockwise to decrease the

amount of outside air coming into the building. Press the push

button again to display the "Building Pressure Set Point"

screen. Adjust the knob clockwise to increase and counter-

clockwise to decrease the desired building pressure level. Press

the button again to return to the main screen. Replace the user

control cover.

Fig. 19 — Exhaust Air Offset Screen

387.eps

Modulating CO₂with Balanced Air Option (Fig. 20) —

This option allows the user to enter minimum and maximum

outside airflow levels. The user will then be allowed to enter

minimum and maximum CO₂levels. The EzERV program will

modulate the cfm of the ERV based on the building CO₂level.

To enter the user settings press the pushbutton once to display

the minimum cfm screen. Adjust the knob clockwise to

increase and counterclockwise to decrease the minimum cfm

level.

Modulating CO₂with Building Pressure Control Option —

This option will modulate the supply fan of the ERV based on

the building CO₂level, and will modulate the exhaust airflow

to maintain the building pressure set point. Follow the proce-

dure outlined above to configure the minimum and maximum

outside airflow and CO₂levels. After setting the maximum

CO₂level press the push button once more to display the build-

ing pressure set point screen. Adjust the knob clockwise to

increase and counterclockwise to decrease the desired building

pressure level. Press the button again to return to the main

screen. Replace the user control cover.

a62-388.eps

Fig. 20 — Modulating Cfm

Press the push button again to display the maximum cfm

screen. Adjust the knob clockwise to increase and counter-

clockwise to decrease the maximum cfm level. See Fig. 21.

Operating Sequence — When operation is called for

by the rooftop supply fan interlock or remote timer option, the

ERV supply blower(s), exhaust blower(s) and wheel motor will

be energized. The supply and exhaust blowers will provide the

adjusted/programmed airflow and the ERV wheel will rotate at

a constant speed unless influenced by one of the following con-

ditions. The sequence of operation is shown in Fig. 24.

LOW TEMPERATURE LOCKOUT — The optional low

temperature lockout function locks out the 62E ERV if the out-

door-air temperature entering the wheel is below the set point.

The low temperature lockout is factory set at –23.3 C (–10 F),

and can be field adjusted from –34.4 C to 37.8 C (–30 F to

100 F).

Fig. 21 — Maximum Cfm Screen a62-389.eps

Press the push button again to display the minimum CO₂

level screen. Adjust the knob clockwise to increase and coun-

terclockwise to decrease the minimum CO₂level. See Fig. 22.

FROST PROTECTION — The frost protection option moni-

tors the pressure drop across the ERV wheel. If the pressure

drop rises above an adjustable limit, the outside air fan will be

de-energized for a 5-minute period. The setting must be field

set at 50% above (1.5 times) the pressure drop measured at the

maximum adjusted airflow and a clean, dry wheel.

ERV WHEEL VARIABLE FREQUENCY DRIVE

(VFD) — The ERV wheel VFD option monitors the pressure

drop across the ERV wheel. If the pressure drop rises above an

adjustable limit, the ERV wheel rotational speed will be re-

duced for a minimum of 5 minutes to defrost the wheel. The

setting must be field set at 50% above (1.5 times) the pressure

drop measured at the maximum adjusted airflow and a clean,

dry wheel.

Fig. 22 — Minimum CO₂Screena62-390.eps

Press the push button again to display the maximum CO₂

level screen. Adjust the knob clockwise to increase and coun-

terclockwise to decrease the maximum CO₂level. See Fig. 23.

Fig. 23 — Maximum CO₂Screen a62-391.eps

The exhaust airflow will automatically adjust to equal the

supply airflow. Press the button again to return to the main

screen. Replace the user control cover.

NOTE: The scale for the cfm vs. CO₂level is based on a CO₂

sensor that outputs 0-vdc at 0 ppm CO₂and 10-vdc at

2000 ppm CO₂. For example, using the figures above, the air-

flow would modulate linearly from 1458 L/s (3090 cfm) at

3vdc to 2336 L/s (4950 cfm) at 5-vdc. A signal below 3-vdc

would result in a constant 1458 L/s (3090 cfm) while a signal

above 5-vdc would result in a constant 2336 L/s (4950 cfm).

PRE-HEATERS — Units may be equipped with electric pre-

heaters to prevent frost build-up on the wheel by slightly

warming the outdoor air. This feature monitors the pressure

drop across the ERV wheel and the outdoor-air temperature. If

the pressure drop rises above an adjustable limit and the out-

door-air temperature is below an adjustable set point, the heat-

ers will be energized. The wheel pressure drop setting must be

field set at 50% above (1.5 times) the pressure drop measured

at the maximum adjusted airflow and a clean, dry wheel. The

outdoor air thermostat is factory set to activate at –20.6 C

(–5 F), and can be field adjusted from –34.4 C to 37.8 C (–30 F

to 100 F).

Modulating CO₂with Offset Air Option — Follow the steps

above for modulating CO₂with balanced air. After setting the

maximum CO₂level press the push button again to display the

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HVAC Supply Fan On

or ERV Timer Option Active

or Stand Alone Short

Pins 31 to 30 and 29 to 28

FALSE

TRUE

Low Temp

Lock Out

FALSE

ERV Wheel Off

Option 51

Lockout

Activated

Wheel Maintenance Indicator Off

Supply Blower Maintenance Indicator Off

Exhaust Blower Maintenance Indicator Off

Supply Blower Off

Exhaust Blower Off

2-Pos Motor Closed

TRUE

FALSE

CO2 Level

Not High

Enough in

Space

TRUE

FALSE

Economizer

Full Open

End Switch

ERV Wheel On

Wheel Maintenance Indicator On

Supply Blower Maintenance Indicator Off

Exhaust Blower Maintenance Indicator On

Supply Blower Off

Exhaust Blower On

2-Pos Motor Open

FALSE

Frost Option

Wheel Iced

TRUE

FALSE

ERV Wheel Modulating

Supply Blower On

Exhaust Blower On

2-Pos Motor Open

Wheel Maintenance Indicator On

Supply Blower Maintenance Indicator On

Exhaust Blower Maintenance Indicator On

Frost Option

Wheel Iced

VFD

FALSE

ERV Wheel Stop/Jog

Supply Blower Off

Exhaust Blower On

2-Pos Motor Open

ERV Power

Exhaust

Mode

Wheel Maintenance Indicator On

TRUE

Supply Blower Maintenance Indicator Off

Exhaust Blower Maintenance Indicator On

FALSE

Free Cooling

ERV Wheel Stop/Jog

Supply Blower On

Exhaust Blower On

2-Pos Motor Open

Wheel Maintenance Indicator On

Supply Blower Maintenance Indicator On

Exhaust Blower Maintenance Indicator On

Dry Bulb Enthalpy

Option and W1

and G are Off

FALSE

ERV Wheel On

Preheat available if

pressure or temperature

are correct for usage

Wheel Maintenance Indicator On

Supply Blower Maintenance Indicator On

Exhaust Blower Maintenance Indicator On

Supply Blower On

Exhaust Blower On

2-Pos Motor Open

Fig. 24 — ERV Sequence of Operation

a62-540

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MOTORIZED DAMPERS — Units may have an optional

two-position outside-air damper, exhaust-air damper, or both.

The dampers will modulate closed when the ERV is off.

MODULATING CO₂CONTROL — The supply fan speed

BT485

TERMINATOR

BACNET

CONNECTION

(BAS PORT)

POWER LED

Tx1 LED

Rx1 LED

Tx2 LED

Rx2 LED

BACNET

BAUD RATE

DIP SWITCHES

EIA-485

JUMPERS

ADDRESS

ROTARY

SWITCHES

RUN LED

ERROR LED

Fig. 25 — UPC Open Controller

Fig. 26 — Network Wiring

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Fig. 27 — BT485 Terminator Installation

Table 8 — MS/TP Wiring Recommendations

SPECIFICATION

Cable

Conductor

Insulation

Color Code

Twist Lay

RECOMMMENDATION

Single twisted pair, low capacitance, CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable

22 or 24 AWG stranded copper (tin plated)

Foamed FEP 0.015 in. (0.381 mm) wall 0.060 in. (1.524 mm) O.D.

Black/White

2 in. (50.8 mm) lay on pair 6 twists/foot (20 twists/meter) nominal

Aluminum/Mylar shield with 24 AWG TC drain wire

Shielding

SmokeGard Jacket (SmokeGard PVC) 0.021 in. (0.5334 mm) wall 0.175 in. (4.445 mm) O.D.

Halar Jacket (E-CTFE) 0.010 in. (0.254 mm) wall 0.144 in. (3.6576 mm) O.D.

Jacket

DC Resistance

Capacitance

Characteristic Impedance

Weight

15.2 Ohms/1000 feet (50 Ohms/km) nominal

12.5 pF/ft (41 pF/meter) nominal conductor to conductor

100 Ohms nominal

12 lb/1000 feet (17.9 kg/km)

UL Temperature Rating

Voltage

SmokeGard 167°F (75°C), Halar -40 to 302°F (-40 to 150°C)

300 Vac, power limited

Listing

UL: NEC CL2P, or better

LEGEND

AWG

CL2P

— American Wire Gage

— Class 2 Plenum Cable

— Direct Current

FEP

NEC

O.D.

— Fluorinated Ethylene Polymer

— National Electrical Code

— Outside Diameter

— Tinned Copper

— Underwriters Laboratories

TO ADDRESS THE UPC OPEN CONTROLLER — The

user must give the UPC Open controller an address that is

unique on the BACnet network. Perform the following proce-

dure to assign an address:

1. If the UPC Open controller is powered, pull the screw ter-

minal connector from the controller's power terminals la-

beled Gnd and HOT. The controller reads the address

each time power is applied to it.

10's

1's

5 ⁴

2. Using the rotary switches (see Fig. 25 and 28), set the

controller's address. Set the Tens (10's) switch to the tens

digit of the address, and set the Ones (1's) switch to the

ones digit.

As an example in Fig. 28, if the controller’s address is 25,

point the arrow on the Tens (10's) switch to 2 and the arrow on

the Ones (1's) switch to 5.

Fig. 28 — Address Rotary Switches

BACNET DEVICE INSTANCE ADDRESS — The UPC

Open controller also has a BACnet Device Instance address.

This Device Instance MUST be unique for the complete BAC-

net system in which the UPC Open controller is installed. The

Device Instance is auto generated by default and is derived by

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adding the MAC address to the end of the Network Number.

The Network Number of a new UPC Open controller is 16101,

but it can be changed using i-Vu^®Tools or BACView device.

By default, a MAC address of 20 will result in a Device In-

stance of 16101 + 20 which would be a Device Instance of

1610120.

DIP switch 3 is used to set up which port the building net-

work is connected to. This DIP switch will always be set to

OFF.

DIP switch 4 is used to tell the UPC controller the commu-

nication language of the building network. This should always

be set to ON, unless the network uses BACnet over ARC156.

CONFIGURING THE BAS PORT FOR BACNET MS/

TP — Use the same baud rate and communication settings for

all controllers on the network segment. The UPC Open con-

troller is fixed at 8 data bits, No Parity, and 1 Stop bit for this

protocol's communications.

If the UPC Open controller has been wired for power, pull

the screw terminal connector from the controller's power termi-

nals labeled Gnd and HOT. The controller reads the DIP

Switches and jumpers each time power is applied to it.

DIP switches 5-8 are used to set up the communication pro-

tocol. See Table 11 for settings.

NETWORK POINTS AND DESCRIPTIONS — The points

list for the controller is shown in Table 12.

BP (AV:1) — The BP (AV:1) parameter is a read-only value

that shows the current building pressure from the building pres-

sure sensor inside the ERV. This parameter is only applicable

for a building pressure based mode of operation.

DCV CO2 INSIDE (AV:2) — This parameter shows the read-

ing from the CO₂sensor that is connected to the ERV. The CO₂

sensor is only provided with the ERV when the ERV has been

ordered with a CO₂based EzERV control scheme.

EAT SENSOR (AV:3), OAT SENSOR (AV:7), RAT SEN-

SOR (AV:9), AND SAT SENSOR (AV:19) — These status

points show the temperatures in all 4 quadrants of the ERV. The

status points will only display values other than 0 if the ERV

was ordered with temperature sensors.

Set the BAS Port DIP switch DS3 to “enable.” Set the BAS

Port DIP switch DS4 to “E1-485.” Set the BMS Protocol DIP

switches DS8 through DS5 to “MSTP.” See Table 9.

Table 9 — SW3 Protocol Switch Settings

for MS/TP

DS8

DS7

DS6

DS5

DS4

DS3

Off

Verify that the EIA-485 jumpers below the CCN Port are set

to EIA-485 and 2W.

The example in Fig. 29 shows the BAS Port DIP Switches

set for 76.8k (Carrier default) and MS/TP.

EXHAUST AIR CFM (AV:5) AND OUTSIDE AIR CFM

(AV:8) — These status points provide the airflow that each fan

is moving if the ERV was ordered with the EzERV option. This

option is an integrated airflow monitoring station.

EX FAN POS (AV:4) AND OA FAN POS (AV:6) — The

fan speed status points provide feedback on a scale of 0 to

100% to show the output of each fan.

Set the BAS Port DIP Switches DS2 and DS1 for the appro-

priate communications speed of the MS/TP network (9600,

19.2k, 38.4k, or 76.8k bps). See Fig. 29 and Table 10.

REMOTE AIRFLOW CONFIGURATION MODE (AV:10)

— This mode sets up the mode of operation for the ERV. The

setting is associated with the control scheme the ERV was

ordered with from the factory. The appropriate setting for this

mode correlates with the last 3 characters of the part number

on the ERV.

Table 10 — Baud Selection Table

BAUD RATE

9,600

DS2

Off

DS1

Off

19,200

38,400

• For part number G-A, the mode is Offset Airflow Con-

trol (mode no. 1).

76,800

• For part number G-B, the mode is CO₂sensor based

Demand Control Ventilation with Offset Airflow Control

(mode no. 2).

• For part number G-D, the mode is Building Pressure sen-

sor based Airflow Control (mode no. 3).

• For part number G-E, the mode is CO₂sensor based

Demand Controlled Ventilation with Building Pressure

sensor based Airflow Control (mode no. 4).

• If the ERV part number does not have "G-" in it then

mode no. 0 should always be used.

Fig. 29 — DIP Switches

Table 11 — UPC Communication Protocol Settings (DIP Switches 5-8)

DIP SWITCH

PROTOCOL

TYPE

BACnet MSTP (m)

BACnet MSTP (s)

BACnet PTP

OFF

Modbus

OFF

LON SLTA

LON Plugin

Ethernet

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Table 12 — Network Points List

BACNET

READ/

BACNET

POINT NAME

OBJECT ID

WRITE

OBJECT NAME

AV:1

AV:2

bp_1

dcv_co2_inside_1

DCV_CO2_INSIDE

AV:3

EAT_SENSOR

eat_sensor_1

AV:4

EX_FAN_POS

ex_fan_pos_1

AV:5

EXHAUST_AIR_CFM

exhaust_air_cfm_1

AV:6

OA_FAN_POS

oa_fan_pos_1

AV:7

OAT_SENSOR

oat_sensor_1

AV:8

OUTSIDE_AIR_CFM

outside_air_cfm_1

AV:9

RAT_SENSOR

rat_sensor_1

AV:10

AV:11

AV:12

AV:13

AV:14

AV:15

AV:16

AV:17

AV:18

AV:19

AV:20

AV:21

AV:22

AV:23

AV:24

AV:25

AV:26

AV:27

AV:28

AV:29

AV:30

BV:1

REMOTE_AIRFLOW_CONFIGURATION_MODE

REMOTE_BP_SENSOR

R/W

remote_airflow_configeration_mode_1

remote_bp_sensor_1

REMOTE_BP_SETPOINT

REMOTE_EXHAUST_OFFSET_SETPOINT

REMOTE_MAX_CFM_SETPOINT

REMOTE_MAX_DCV_VALUE_SETPOINT

REMOTE_MIN_CFM_SETPOINT

REMOTE_MIN_DCV_VALUE_SETPOINT

REMOTE_SENSOR_DCV_VALUE

SAT_SENSOR

remote_bp_setpoint_1

remote_exhaust_offset_setpoint_1

remote_max_cfm_setpoint_1

remote_max_dcv_value_setpoint_1

remote_min_cfm_setpoint_1

remote_min_dcv_value_setpoint_1

remote_sensor_dcv_value_1

sat_sensor_1

UPC_SOFTWARE_VERSION_STAT

UPC_SOFTWARE_VERSION

EX_FILTER_BP

upc_software_version_stat_1

upc_software_version_1

ex_filter_bp_1

OA_FILTER_BP

oa_filter_bp_1

REMOTE_EX_FILTER_BP_SETPOINT

REMOTE_OA_FILTER_BP_SETPOINT

MMC_MAIN_BOARD_SOFTWARE_VERSION

REMOTE_EX_FAN_SPEED_SETPOINT

REMOTE_OA_FAN_SPEED_SETPOINT

ERV_VFD_WHEEL_POS

REMOTE_VFD_WHEEL_SPEED_SETPOINT

ERV_2POS_DAMPER_STAT

ERV_EX_STAT

remote_ex_filter_bp_setpoint_1

remote_oa_filter_bp_setpoint_1

mmc_main_board_software_version_1

remote_ex_fan_speed_setpoint_1

remote_oa_fan_speed_setpoint_1

erv_vfd_wheel_pos_1

remote_vfd_wheel_speed_setpoint_1

erv_2pos_damper_stat_1

erv_ex_stat_1

BV:2

BV:3

ERV_OA_STAT

erv_oa_stat_1

BV:4

ERV_WHEEL_STAT

erv_wheel_stat_1

BV:5

EX_BLOWER_ALARM

ex_blower_alarm_1

BV:6

BV:7

EX_DIRTY_FILTER_ALARM

FIX_WHEEL_ALARM

ex_dirty_filter_alarm_1

fix_wheel_alarm_1

BV:8

OA_BLOWER_ALARM

oa_blower_alarm_1

BV:9

OA_DIRTY_FILTER_ALARM

OA_LOWCFM

oa_dirty_filter_alarm_1

oa_lowcfm_1

BV:10

BV:11

BV:12

BV:13

BV:14

BV:15

BV:16

REMOTE_BP_SENSOR_ENABLE

REMOTE_DCV_SENSOR_ENABLE

REMOTE_ERV_DOWN_ENABLE

REMOTE_PWR_EXHAUST_ENABLE

REMOTE_START_STOP

R/W

remote_bp_sensor_enable_1

remote_dcv_sensor_enable_1

remote_erv_down_enable_1

remote_pwr_exhaust_enable_1

remote_start_stop_1

REMOTE_WHEEL_BYPASS_ENABLE

remote_wheel_bypass_enable_1

REMOTE BP SENSOR (AV:11) — This parameter is only

applicable if the ERV is running in a building pressure based

mode of operation and the parameter REMOTE BP SENSOR

ENABLE (BV:11) is set to 1. If the parameter is set to 0, then

the ERV will use the BP (AV:1) parameter. The ERV will mod-

ulate the exhaust fan to try to achieve the number that is set into

REMOTE BP SETPOINT (AV:12).

REMOTE BP SENSOR SETPOINT (AV:12) — This is the

desired building pressure. The ERV will modulate the exhaust

fan to try to achieve this set point. This parameter is only appli-

cable for a building pressure based mode of operation. The

ERV will use this value for its calculations if the REMOTE

AIRFLOW CONFIGURATION MODE (AV:10) is not 0. If

the REMOTE AIRFLOW CONFIGURATION MODE

(AV:10) is set to 0, then the ERV will use the value that has

been loaded locally into the ERV control board.

REMOTE EXHAUST OFFSET SETPOINT (AV:13) —

This parameter is applicable when REMOTE AIRFLOW

CONFIGURATION MODE (AV:10) is configured to 1 or 2.

This will set the difference by which the exhaust airflow will

follow the outside airflow. For example, if the demand control

ventilation set points are telling the outdoor air fan to run at

4,000 cfm, and the REMOTE EXHAUST OFFSET SET-

POINT (AV:13) is set to -1,000, then the exhaust fan will be

running at 3,000 CFM.

REMOTE SENSOR DCV VALUE (AV:18) — This parame-

ter is also only applicable if the ERV is running in a CO₂based

mode of operation and the parameter REMOTE DCV SEN-

SOR ENABLE (BV:12) is set to 1. If REMOTE DCV

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SENSOR ENABLE (BV:12) is set to 0, then the ERV will use

the DCV CO2 INSIDE (AV:2) parameter. Any value can be

written into this parameter.

FIX WHEEL ALARM (BV:7) — This alarm indicates that

the ERV heat exchange wheel is not turning when it is sup-

posed to be turning. This alarm will never go active if the ERV

was not ordered with this alarm option.

EX DIRTY FILTER ALARM (BV:6) AND OA DIRTY

FILTER ALARM (BV:9) — This alarm indicates that the air

filters in the ERV need to be changed. These alarms are related

to parameters REMOTE EX FILTER BP SETPOINT (AV:24)

and REMOTE OA FILTER BP SETPOINT (AV:25). The set

points determine when the ERV is going to give a dirty filter

alarm. This alarm will never go active if the ERV was not or-

dered with the dirty filter alarm options.

The ERV will look at this parameter along with parameters:

REMOTE MIN DCV VALUE SETPOINT (AV:17), RE-

MOTE MAX DCV VALUE SETPOINT (AV:15), REMOTE

MIN CFM SETPOINT (AV:16), and REMOTE MAX CFM

SETPOINT (AV:14) to determine the settings for the ERV.

These 4 remote set points will only be used if the REMOTE

AIRFLOW CONFIGURATION MODE (AV:10) parameter is

not 0. Otherwise the values that have been loaded locally into

the ERV will be used.

EX FILTER BP (AV:22) AND OA FILTER BP (AV:23) —

These status points show the pressure drop across each air fil-

ter. This pressure drop is used to determine when the air filters

are dirty. These numbers will always be 0 unless the ERV was

ordered with this option.

OA LOW CFM (BV:10) — This alarm becomes active if the

desired outside air CFM set point is not being met. The alarm

will only trip if the desired outside air CFM set point has not

been satisfied for 5 minutes.

REMOTE BP SENSOR ENABLE (BV:11) — If this param-

eter is set to OFF the ERV will use the building pressure read-

ing off of the sensor inside the ERV. If the parameter is set to

ON, the ERV will use the building pressure value that is being

written in parameter REMOTE BP SENSOR VALUE.

REMOTE ERV DOWN ENABLE (BV:13) — This parame-

ter is another start/stop command for the ERV. Turning this pa-

rameter to 1 will shut the ERV down. Unlike the REMOTE

START STOP (BV:15) parameter, it is not dependant on the

REMOTE AIRFLOW CONFIGURATION MODE (AV:10)

parameter.

REMOTE PWR EXHAUST ENABLE (BV:14) — This pa-

rameter puts the ERV into a power exhaust mode that is usually

used in conjunction with the economizer of the rooftop unit.

The power exhaust mode turns off the wheel and the outside air

blower. The exhaust blower will continue to run at its current

set point. Setting this parameter to 1 will put the ERV into pow-

er exhaust mode.

REMOTE START STOP (BV:15) — This parameter allows

the user to turn on/off the ERV. Setting this parameter to 1 will

turn the ERV ON. The REMOTE START STOP works in con-

junction with the start/stop contact on the ERV field terminal

strip if the REMOTE AIRFLOW CONFIGURATION MODE

(AV:10) is set to 0. If the REMOTE AIRFLOW CONFIGU-

RATION MODE (AV:10) is not set to 0, then the REMOTE

START STOP parameter will override the field terminal strip.

REMOTE WHEEL BYPASS ENABLE (BV:16) — Setting

this parameter to 1 will turn off the ERV heat exchange wheel.

This mode is normally used to disable the wheel when free

cooling is available.

REMOTE EX FILTER BP SETPOINT (AV:24) AND

REMOTE OA FILTER BP SETPOINT (AV:25) — These

set points are related to the dirty filter indicator option of the

ERV. If the ERV has the dirty filter indicator option installed

this parameter will set the trip point for which the ERV will

give a dirty filter alarm. This number will be dependent on the

airflow that the ERV is set to. The best way to determine the

dirty filter set points is to use the unit status parameters called

EX FILTER BP (AV:22) and OA FILTER BP (AV:23). With

clean filters in the ERV, and the ERV running at its design con-

ditions, note the values of the filter status parameters. Multiply

those numbers by 1.5 and use them for the filter set points.

These set points will overwrite the value that was set locally

into the ERV. If this value is changed locally it will overwrite

the value that was set remotely.

REMOTE EX FAN SPEED SETPOINT (AV:27) AND

REMOTE OA FAN SPEED SETPOINT (AV:28) — These

parameters allow for direct input to tell the fans how fast to run.

The parameter needs to be set to a number between 1% and

100%. When this parameter is set to 0% the ERV’s internal

control board will take control of the fans.

ERV WHEEL SPEED (AV:29) — This status shows the

speed that the ERV heat exchanger wheel is running on a scale

of 0 to 100%. If the ERV was not ordered with a variable fre-

quency drive on the wheel this status will always read 100%.

REMOTE VFD WHEEL SPEED SETPOINT (AV:30)

—

This parameter allows for the wheel rotation speed to be varied.

This is often used to change the efficiency of the Energy Re-

covery Heat Exchanger Wheel to maintain a constant discharge

temperature. This needs to be entered as a number that is be-

tween 1% and 100%. Entering 0% will put the wheel speed in

automatic mode, and the ERV control board will take control.

To turn off the wheel use the REMOTE WHEEL BYPASS

ENABLE (BV:16) parameter.

SERVICE

CAUTION

ERV 2POS DAMPER STAT (BV:l) — This status shows if

the ERV is commanding the two-position dampers to open.

This status will update whether the ERV was ordered with two-

position dampers or not.

ERV EX STAT (BV:2) AND ERV OA STAT (BV:3) —

These status points output a logic 1 to show when the fan is

ON.

ERV WHEEL STAT (BV:4) — The ERV WHEEL STAT sta-

tus shows whether or not the ERV heat exchange wheel is

running.

Disconnect electrical power before servicing energy recov-

ery cassette. Failure to do so could result in personal injury.

Removing and Installing Non-Segmented Wheel

for Cleaning (62EB,E7 Units) — Non-segmented en-

ergy transfer wheels are secured to the shaft and bearing sup-

port beam by a Phillips head screw and hub cover. See Fig. 30.

To remove the energy transfer wheel, follow Steps 1-4

below. (See Fig. 30.) Reverse procedure for wheel installation.

1. Remove front seal assembly (pulley side of cassette) if

present.

2. Remove belt from pulley and position temporarily around

wheel rim.

3. Remove the hub cover from the wheel. Note the wheel to

shaft alignment pin under the hub cover. Ensure this pin

ERV EX BLOWER ALARM (BV:5) AND ERV OA

BLOWER ALARM (BV:8) — These alarms indicate a cata-

strophic failure of a blower in the ERV. The alarms can also in-

dicate a missing leg of incoming power, over voltage, under

voltage or extremely dirty incoming power to the ERV. These

alarms will never go active if the ERV was not ordered with the

blower alarm options.

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engages the notch at the end of the shaft when reinstalling

the wheel.

3. Remove the belt from the pulley and position temporarily

around the wheel rim.

4. Pull the wheel straight off the shaft. Handle wheel with

care to prevent distorting of the wheel.

4. Loosen the 2 set screws on each of the 2 wheel bearings.

See Fig. 31.

Removing and Installing Non-Segmented

CAUTION

Wheel for Cleaning

(62ECC and 62E2C

Units) — Non-segmented energy transfer wheels include

the shaft and are secured to 2 wheel support beams by 2 flange

bearings with locking collars. See Fig. 31.

When replacing wheel, retighten the 4 bearing set screws.

Premature bearing failure could result.

To remove the energy transfer wheel, follow Steps 1-4

below. Reverse procedure for wheel installation.

1. Pull the wheel with shaft straight out of the motor side

wheel support beam and bearing. Handle wheel with care

to prevent distorting of the wheel.

Removing Wheel Segments for Cleaning

(62ECD, 62ED-EU, 62E2D, and 62E3-E6 Units)

1. Unlock and open the segment retaining brackets on both

sides of the selected segment opening. Refer to Fig. 32.

2. Gently lift segment outward.

2. Remove the pulley side wheel support beam with bearing

by removing the 4 support beam screws.

3. Close segment retaining latches and rotate wheel 180 de-

grees to remove next segment. Follow this pattern to

remove all segments. This pattern will help keep wheel

balanced.

To install the segments, see the Installing Wheel Segments

section.

Alignment

Cassette

Housing/Frame

Shaft

A62-278ef

Bearings (2)

A62-279ef

Wheel &

Hub

Hub Cover

Fig. 30 — 62EB and 62E7 Energy

Transfer Wheel Assembly

Fig. 32 — Unlocking the

Segment Retaining Brackets

WHEEL,

HUB &

Installing Wheel Segments

WARNING

SHAFT

FLANGE

BEARINGS

(2)

Before performing service or maintenance operations on

unit, turn off main power switch to unit. Electrical shock

could cause personal injury.

NOTE: Both installation and removal procedures must be per-

formed from the pulley side of the cassette.

SET

SCREWS

(2) EACH

CAUTION

Weight of the installed segment will cause the wheel to

accelerate in rotation. Failure to maintain control of the

wheel rotation while installing all segments could cause

severe injury to fingers or hand caught between revolving

spokes and the bearing support beam. Handle of hammer,

or other stop, should be inserted through spokes and above

or below bearing support beams to limit rotation of unbal-

anced wheel. See Fig. 33.

WHEEL SUPPORT BEAMS

Fig. 31 — 62ECC and 62E2C Energy

Transfer Wheel Assembly

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3. Ease the segment downward until its outer rim clears the

inside of the wheel rim. Then press the segment inward

against the spoke flanges.

A62-280ef

4. Close and latch segment retaining brackets to the position

shown in Fig. 36. Make certain the retaining bracket is

fully engaged under the catch.

HAMMER

USED AS

“STOP”

PULL TAB

CATCH

A62-283ef

Fig. 36 — Latch Segment Retaining Brackets

Fig. 33 — Using a Stop on the Wheel

5. Slowly rotate, by hand, the first installed segment to the

bottom of the cassette, then install the second segment

opposite the first. Repeat this sequence with the 2 in-

stalled segments rotated to the horizontal position to bal-

ance the weight of installed segments. Continue this se-

quence with the remaining segments.

NOTE: The 62EBA, 62EBC, 62ECC, 62E7A, 62E7C, and

62E2C units contain non-segmented wheels which must be

completely removed to be cleaned.

1. Begin by positioning one segment opening at the top of

the cassette. Unlock and open the segment retaining

brackets on both sides of the selected segment opening.

2. Holding the segment as vertical as possible and

centered between spokes, insert nose of segment down-

ward between the hub plates. See Fig. 34.

Wheel Drive Motor and Pulley Replacement

(62EC-EU and 62E2-E6 Units)

1. Disconnect power to wheel drive motor.

2. Remove belt from pulley and position temporarily around

wheel rim.

3. Loosen setscrew in wheel drive pulley using Allen

wrench and remove pulley from motor drive shaft.

4. While supporting weight of drive motor in one hand,

loosen and remove 4 mounting bolts.

5. Install replacement motor with hardware kit supplied.

6. Install pulley to dimension shown in Fig. 37 and secure

setscrew to drive shaft.

7. Stretch belt over pulley and engage in groove.

Belt Replacement

1. Obtain access to the pulley side bearing access plate.

Remove 2 bearing access plate retaining screws and the

access plate.

A62-281ef

2. Using hexagonal wrench, loosen setscrew in bearing

locking collar. Using light hammer and drift (in drift pin

hole) tap collar in the direction of wheel rotation to

unlock collar. Remove collar.

3. Using socket wrench with extension, remove 2 nuts

which secure bearing housing to the bearing support

beam. Slide bearing from shaft.

NOTE: Slight hand pressure against wheel rim will lift weight

of wheel from inner race of bearing to assist bearing removal

and installation. If not removable by hand, use bearing puller.

Fig. 34 — Inserting a Segment of the Wheel

NOTE: The face of the segment, with the imbedded

stiffener (vertical support between nose and rim end of

segment) must face the motor side of the cassette. See

Fig. 35.

Imbedded Stiffeners

A62-282ef

CAUTION

Protect hands and belt from possible sharp edges of hole in

bearing support beam.

4. Using a wrench, remove diameter seal retaining screws or

hub seal retaining screws. Remove diameter seals or hub

seal from bearing beam. See Fig. 38.

5. Form a small loop of belt and pass it through the hole in

the bearing support beam. Grasp the belt at the wheel hub

and pull the entire belt down. Loop the trailing end of the

belt over the shaft (Fig. 38 shows belt partially through

the opening).

Fig. 35 — Motor Side View of Segment

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6. Reinstall the bearing onto the wheel shaft, being careful

to engage the 2 locating pins into the holes in the bearing

support beam. Secure the bearing with 2 self-locking

nuts.

all the wires. Disconnect the wiring from the terminals. Re-

move all the P-clips, wire ties, and hoses that will keep the

blower assembly from lifting out. Remove all the bolts that

hold the blower assembly in the ERV unit. Carefully lift the

blower assembly from its mounting plate.

NOTE: When removing 500 mm and 630 mm blowers it is

helpful to get assistance because of the blower's size and

weight.

7. Install the belts around the wheel and pulley according to

the instructions provided with the belt.

8. Reinstall diameter seals or hub seal and tighten retaining

screws. Rotate wheel in clockwise direction to determine

that wheel rotates freely with slight drag on seals.

9. Reinstall bearing locking collar. Rotate collar by hand in

the direction the wheel rotates (see label provided on each

cassette for wheel rotation). Lock in position by tapping

drift pin hole with hammer and drift. Secure in position

by tightening setscrew.

Follow these instructions in reverse order to install the new

blower.

SUPPLY SIDE — Turn off the power to the unit. Remove the

intake air hood (if equipped). Remove all of the screws from

the top panel on the supply side of the ERV. Be sure to remove

the screws on the center seam. Pry the top panel up from its

gasket seat, being careful not to bend the lid. Remove the ser-

vice doors on both sides and remove the filters or filter racks on

the supply side. Remove the cover from the blower motor and

note the location of all the wires. Disconnect the wiring from

the terminals.

10. Reinstall bearing access cover.

11. Apply power to wheel and ensure that the wheel rotates

freely without interference.

ALTERNATE BELT REPLACEMENT METHODS — Alter-

nate belt replacement methods may be used in some applica-

tions depending upon accessibility of the cassette. Consult

instructions provided with the belt for further information.

NOTE: Push the wheel out from underneath the blower that is

being disconnected for more room to work.

Removing the Service Door — To open the cabinet,

turn the eight ¼-turn latches counter clockwise. With a hand on

each handle of the door, carefully pull the door straight out.

Remove all of the P-clips, wire ties, and hoses that will keep

the blower assembly from lifting out. Remove all of the bolts

that hold the blower assembly in the ERV unit. Carefully lift

the blower assembly from its mounting plate.

NOTE: When removing 500 mm and 630 mm blowers it is

helpful to get assistance because of the blower's size and

weight.

Replacing a Blower (All ERV Cabinets Except

62EB and 62E7 Units)

EXHAUST SIDE — Turn off power to the unit. Remove all

screws from the top panel on the exhaust side of the ERV. Be

sure to remove the screws on the center seam. Pry the top panel

up from its gasket seat, being careful not to bend the lid. Re-

move the cover from the blower motor and note the location of

Follow these instructions in reverse order to install the new

blower.

DIMENSION A

WHEEL MODEL

NUMBER

62E UNIT SIZE ERV WHEEL

3.2

in.

1/8

Insulation

ERC-1904

ERC-1906

B,7

6.4

1/4

ERC-2509

6.4

1/4

C,2

D,3

ERC-2510C

ERC-2513C

ERC-3014C

ERC-3019C

ERC-3615

3.2

1/8

3.2

1/8

Seal

3.2

1/8

Plate

3.2

1/8

6.4

1/4

ERC-3622

6.4

1/4

Dimension A

E,4

H,5

ERC-3623

6.4

1/4

Wheel

Drive

ERC-3628

6.4

1/4

ERC-5230

9.5

3/8

Motor

ERC-5248

9.5

3/8

ERC-5245

9.5

3/8

ERC-5262

9.5

3/8

ERC-6475

11.1

7/16

Pulley

K,6

ERC-6488

ERC-6876

ERC-68100

ERC-7490

A62-284ef

ERC-74122

ERC-81110C

ERC-81146C

ERC-86125C

ERC-86170C

ERC-92135C

ERC-92180C

ERC-99160C

ERC-99215C

ERC-104195C

ERC-104250C

ERC-110220C

ERC-110290C

NOTE: The ERV wheel model number contains the wheel series number, and

is located on a label near the drive pulley. For example, ERC-5245 is a 52

series wheel.

Fig. 37 — Pulley Location

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Belt (Shown in

Place)

Locking

Collar

Bearing

Support

Beam

Wheel Rim

Locking

Nut (2)

Wheel

Bearing

Housing

Access Plate

Hub (2)

Taper - Lock

Hub Collar (2)

Retaining

Screws

Set Screw

Shaft

Drift Hole

Locating Pin

PULL

A62-285ef

FEED

Belt

Pulley

Side

Motor

Side

Fig. 38 — Belt Replacement (Diameter Seals Removed)

Measurable changes in latent energy transfer can occur in

shorter periods of time in applications such as moderate occu-

pant smoking or cooking facilities. In applications experienc-

ing unusually high levels of occupant smoking or oil-based

aerosols such as industrial applications involving the ventila-

tion of machine shop areas for example, annual washing of en-

ergy transfer may be necessary to maintain latent transfer effi-

ciency. Proper cleaning of the energy recovery wheel will re-

store latent effectiveness to near original performance.

Replacing a Blower (62EB and 62E7 Units)

EXHAUST OR SUPPLY SIDE — Turn off the power to the

unit. Remove all of the screws from the top panel. Pry the top

panel up from its gasket seat, being careful not to bend the lid.

Disconnect plug from the blower. Remove all of the P-clips,

wire ties and hoses that will keep the blower assembly from

lifting out. Remove all of the screws holding the blower in the

ERV unit and remove the blower. Follow these instructions in

reverse order to install the new blower.

To clean, gain access to the energy recovery wheel and

remove wheel. Brush foreign material from the face of the

wheel. Wash the wheel in a 5% solution of non-acid based coil

cleaner or alkaline detergent and warm water.

Soak in the solution until grease and tar deposits are

loosened.

NOTE: Some staining of the desiccant may remain and is not

harmful to performance.

Before removing, rapidly run finger across surface of wheel

to separate polymer strips for better cleaning action. Rinse

dirty solution from wheel and remove excess water before

reinstalling.

MAINTENANCE

Routine maintenance of the energy recovery cassettes

includes periodic cleaning of the energy recovery wheel as well

as inspection of the air seals and wheel drive components as

follows:

Cleaning — The need for periodic cleaning of the energy

recovery wheel will be a function of operating schedule, cli-

mate and contaminants in the indoor air being exhausted, and

the outdoor air being supplied to the building.

The air exchange wheel is “self-cleaning” with respect to

dry particles due to its laminar flow characteristics. Smaller

particles pass through; larger particles land on the surface and

are blown clear as the flow direction is reversed. Any material

that builds up on the face of the wheel can be removed with a

brush or vacuum. The primary need for cleaning is to remove

oil-based aerosols that have condensed on energy transfer

surfaces.

CAUTION

Do not use acid based cleaners, aromatic solvents, steam or

temperatures in excess of 76.7 C (170 F); damage to the

wheel may result.

A characteristic of all dry desiccants, such films can close

off micron sized pores at the surface of the desiccant material,

reducing the efficiency by which the desiccant can adsorb and

desorb moisture and also build up so as to reduce airflow.

In a reasonably clean indoor environment such as a school

or office building, measurable reductions of airflow or loss of

sensible effectiveness may not occur for several years.

Air Seals — Diameter seals are provided on each cassette

to minimize transfer of air between the counter flowing

airstreams.

To adjust diameter seals, loosen diameter seal adjusting

screws and back seals away from wheel surface See Fig. 39.

Rotate wheel clockwise until 2 opposing spokes are hidden

behind the bearing support beam. Using a folded piece of paper

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as a feeler gage, position paper between the wheel surface and

diameter seals. Adjust seals towards wheel surface until a slight

friction on the feeler gage (paper) is detected when gage is

moved along the length of the spoke. Retighten adjusting

screws and recheck clearance with “feeler” gage.

Air Filters — With this ERV unit and with most other

forced air heating, cooling and ventilation systems, regular air

filter maintenance is of utmost importance. Proper filter main-

tenance will improve indoor air quality, keep the building air-

handling system clean for peak efficiency, and prolong the life

of the HVAC (Heating, Ventilation, and Air Conditioning)

equipment. The life of the air filters is directly related to the ap-

plication to which the ERV unit is installed. The air filters

should be inspected every couple of weeks until a maintenance

schedule is established. The ERV unit is equipped from the fac-

tory with throwaway filters, however if the installer changed

the filter type, consult the installer for filter maintenance

instructions.

Wheel Drive Components — The wheel drive motor

bearings are pre-lubricated and no further lubrication is neces-

sary. Make certain air cooling ports are not blocked.

The wheel drive pulley is secured to the drive motor shaft

by a setscrew. The setscrew is secured with removable adhe-

sive to prevent loosening. Annually confirm setscrew is secure.

The wheel drive belt is a urethane stretch belt designed to

provide constant tension through the life of the belt. No adjust-

ment is required. Inspect the drive belt annually for proper

tracking and tension. A properly tensioned belt will turn

the wheel immediately after power is applied with no visible

slippage during start-up.

Replacing the Throwaway Filters — After remov-

ing the service door (see Removing the Service Door section)

remove the spacer plugs and pull the filters or filter racks out of

the cabinet. Replace the filters with the original equipment

manufacturer replacements or equivalents. Refer to Tables 1A

and 1B for filter sizes.

A62-286ef

Rotation

Adjust

Adjusting Screws

Feeler Gage

Fig. 39 — Diameter Seal Adjustment

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TROUBLESHOOTING

See Table 13 for troubleshooting information.

Table 13 — ERV Troubleshooting

SYMPTOM

POSSIBLE CAUSES

ACTION TO CHECK

POSSIBLE REMEDY

Disconnect switch is in the off

position

Verify that the disconnect switch is Move the disconnect lever to the 'ON'

in the 'ON' position

position.

Using a volt meter verify that the voltage

Check for power at the disconnect being supplied to the ERV matches the ERV's

No power to the ERV

switch

operating voltage. If the ERV operates on

three phase power check all three legs.

ERV will not turn on

Using a volt meter verify that the voltage on

the bottom side of the fuse block matches the

ERV's operating voltage. If the ERV operates

on three phase power check all three legs.

Check for power at the bottom of

the fuse block

One or more blown fuses

Look at the small transformer next

to the control circuit board to see if Depress the circuit breaker back in.

the black circuit pushed out

Control board transformer circuit

breaker is tripped

Use the user interface push button Adjust the fan speed / CFM demand levels by

The fan speed / CFM level is set

too low

to view the 'Outside Air' and

'Exhaust Air' settings

pressing the user interface push button and

turning the adjust knob.

Using a volt meter verify that the voltage on

the bottom side of the fuse block matches the

ERV's operating voltage. If the ERV operates

on three phase power check all three legs.

Check for power at the bottom of

the fuse block

One or more blown fuses

Using a continuity meter check for continuity

across the two wires that connect to the mer-

Rooftop Economizer Option (if

equipped) has shut down the ERV

because the rooftop unit is in 'Free

Cooling' mode

Check for continuity across the

ERV is running but

blowers will not turn

mercury switch on the economizer cury switch on the economizer damper. If the

damper.

contacts are open, the rooftop unit is in 'Free

Cooling'.

Smoke Detector Option (if

Using the wiring schematics verify that the

smoke detector is wired to the control board

properly.

equipped) has shut down the ERV

because it is sensing smoke in the

exhaust airstream on the ERV.

Check for wiring errors.

Use a thermometer to measure the outside

temperature. Use the wiring schematics to

verify that temperature probe on the intake air

side of the ERV is wired properly.

Check to see if the outside temper-

ature is above –30 F

(–34.4 C). Check for wiring errors

Low Temperature Lockout Option

(if equipped)

Use the user interface push button Adjust the fan speed / CFM demand levels by

The fan speed / CFM level is set

too low

to view the 'Outside Air' and

'Exhaust Air' settings

pressing the user interface push button and

turning the adjust knob.

Rooftop Economizer with Power

Relief Option (if equipped) has

shut down the supply blower

Using a continuity meter check for continuity

across the two wires that connect to the mer-

Check for continuity across the

mercury switch on the economizer cury switch on the economizer damper. If the

because the rooftop unit is in 'Free damper

Cooling' mode

contacts are open, the rooftop unit is in 'Free

Cooling'.

Only one of the two

blowers is turning

Using the wiring schematics verify that both

the power wires and the control wires are con-

nect properly.

One of the blowers is wired

incorrectly

Check for wiring errors.

The ERV Standard Frost Protec-

tion Option has turned off the sup- Check for frost on the wheel.

ply blower to defrost the wheel

Wait for Defrost mode to finish.

The ERV Enthalpy Control, Dry

bulb Control / Wheel Bypass Stop / Check for Stop / Jog movement of

Wait until sequence is completed.

Jog Option (if equipped) is

activated

wheel.

Check to see if the connector

between the wheel motor and the

cabinet wiring is securely

connected.

The wheel motor is unplugged.

Plug the two connectors together.

Blowers are on but

the wheel is not

turning

The wheel motor is wired

incorrectly.

Compare the wheel motor, control board and

relay are wired correctly.

Verify that the wheel belt is seated in the pul-

ley and on the rim of the wheel.

Check for wiring errors.

Check the wheel belt.

The wheel belt is off or broken

Carefully rotate the wheel by grabbing the

outer rim and spinnig the wheel. After letting

go the wheel should continue to spin for three

to four seconds. Should the air seals need

adjusting see the maintainence section of this

book.

The air seals on the wheel are too Check to see if the wheel spins

tight freely.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53620007-01 Printed in U.S.A. Form 62E-C1SI Pg 38 8-10 Replaces: New

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START-UP CHECKLIST

I. PROJECT INFORMATION:

Job Name ____________________________

ERV Unit Designation __________________

Phone Number ________________________

II. DESIGN INFORMATION:

Start-Up Performed By __________________

Date __________________________________

Application ___________________________________________________________________________

CFM (Supply/Exhaust) _________________________________________________________________

External Static Pressure (Supply/Exhaust) __________________________________________________

Supply/Exhaust Configuration ____________________________________________________________

Voltage/Phase ________________________________________________________________________

ERV Unit Part Number _________________________________________________________________

Coupled to RTU or stand-alone ___________________________________________________________

Specify RTU.

NOTE: Complete This Section for Coupled Applications Only

Model Number ________________________________________________________________________

HVAC Unit Discharge Type (Down discharge or horizontal discharge.) ____________________________

Roof Curb (Option)

Yes

14-in. Tall Roof Curb (Field Installed)

Horizontal Supply/Return Base (Field Installed)

Combination ERV-RTU Curb (Field Installed)

Horizontal Transition

NOTE: Complete This Section for Coupled Applications Only.

Transition Part Number (Field Installed)

Electrical Disconnect (Option)

Fused (Factory Installed)

Yes

Switched (Factory Installed)

Two-Position Motorized Dampers (Option)

Outside Air Damper (Factory Installed)

Exhaust Air Damper (Factory Installed)

Pre-Heater (Option)

kW _______________

Temp Control (Factory Installed)

Temp and Static Pressure Control (Factory Installed)

Frost Protection (Option) (Factory Installed)

NOTE: Do Not Use With Pre-Heater.

Yes

ERV Wheel VFD (Option) (Factory Installed)

Yes

Low Temperature Lock Out (Option) (Factory Installed)

Filter Maintenance Indicator (Option) (Factory Installed)

ERV Blower Maintenance Indicator (Option) (Factory Installed)

ERV Wheel Maintenance Indicator (Option) (Factory Installed)

Field-Installed Accessories

ERV Remote Mount Timer (Field Installed)

ERV Remote Control Readout (Field Installed)

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53620007-01 Printed in U.S.A. Form 62E-C1SI Pg CL-1 8-10 Replaces: New

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