Honeywell Ventilation Hood W7753A User Manual

Excel 10

W7753A Unit Ventilator Controller

INSTALLATION INSTRUCTIONS

The W7753A Controller communicates via the 78 kilobaud

PRODUCT DESCRIPTION

Echelon® LonWorks® E-Bus Network.

The W7753A Unit Ventilator Controller is a Free Topology

Transceiver (FTT) LONMARK® Compliant Unit Vent controller

in the Excel 10 family product line.

Allowable input/output connections consist of wall module

points plus two additional resistive sensor inputs, two voltage/

current inputs, four digital inputs and eight digital Triac

outputs.

This controller can be used to monitor/control HVAC

equipment, lighting, and other miscellaneous loads in a

distributed network. The controller is field-mounted to the

equipment that it controls, and the controller wiring is attached

to the screw terminals located on the controller (see Fig. 1).

For the W7753A, any hardware driven by the Triac outputs

must have a minimum current draw, when energized, of

25 mA and a maximum current draw of 500 mA.

OUT

DI-4

OUT

GND

DI-3

DI-2

OUT

GND

DI-1

OUT

COM

OUT

LED

BYP

ASS

SNSR

GND

SET

AI-1

GND

A1-2

AI-3

GND

OHM

AI-4

V/mA ^22VDC

OHM

E-BUS

V/mA

E-BUS

JACK

OUT

M12688

Fig. 1. Excel 10 W7753A Unit Ventilator Controller.

Put Bar Code Here

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

Power

The 24 Vac power from an energy-limited Class II Power

Source must be provided to each W7753A Controller. To

conform to Class II restrictions (U.S. only), transformers must

not be larger than 100 VA.

A transformer that meets CE mark requirements and that

meets the Low Voltage Directive (LVD) requirements must be

used in Europe for all installations of this product. More than

one W7753A Controller can be powered by a single

transformer. Fig. 4 shows power wiring details for a single

controller and Fig. 5 depicts multiple controllers using one

transformer.

IMPORTANT

Use the heaviest gauge wire available, up to 14

AWG (2.0 mm²) with a minimum of 18 AWG

(1.0 mm²), for all power and earth ground wiring.

Screw type terminal blocks are designed to accept

up to two 14 AWG (2.0 mm²) conductors, one on

each side of the terminal screw. More than two wires

that are 14 AWG (2.0 mm²) can be connected with a

wire nut. Include a pigtail with this wire group and

attach the pigtail to one side of the terminal block.

M6857

Fig. 3. W7753A DIN rail mounting.

OUTPUT

DEVICE

POWER

Wiring

TRANSFORMER

TRIAC LINES

All wiring must comply with applicable electrical codes and

ordinances or as specified on installation wiring diagrams.

Controller wiring on the W7753A is terminated to the screw

terminal blocks located on the top and the bottom of the

controller.

TO ACTUATORS

AND

CONTACTORS

W7753A

CONNECT POWER TO

TERMINALS 24 AND 25

2524 22 20

NOTES:

—

For multiple controllers operating from a single

transformer, the same side of the transformer

secondary must be connected to the same power

input terminal in each controller. The ground

terminal (1 on the W7753A) must be connected to

a verified earth ground for each controller in the

group (see Fig. 5). (Controller configurations are

not necessarily limited to three controllers, but the

total power draw including accessories cannot

exceed 100 VA when powered by the same

transformer (U.S. only). See System Engineering

form 74-2964 for power wiring recommendations.)

All loads on an Excel 10 W7753A Controller must

be powered by the same transformer that powers

the Excel 10 W7753A Controller. A W7753A

Controller can use separate transformers for

controller power and load power.

Keep the earth ground connection (terminal 1)

wire run as short as possible. Refer to Fig. 9

through 14.

Do not connect the analog or digital ground

terminals (5, 8, 11, 27 and 30) to earth ground.

Refer to Fig. 9 through 14.

EARTH

GROUND

M12681

Fig. 4. Power wiring details; one Excel 10 per transformer.

—

NOTES:

—

Unswitched 24 Vac power wiring can be run in the

same conduit as the E-Bus cable.

Maintain at least three-inch (76 mm) separation

between Triac outputs and E-Bus wiring

throughout the installation.

—

See the following IMPORTANT on Heating and Cooling

Equipment (UL 1995, U.S. only).

IMPORTANT

If the W7753A Controller is used on Heating and

Cooling Equipment (UL 1995, U.S. only) and the

transformer primary power is more than 150 volts,

connect the transformer secondary to earth ground

(see Fig. 6). For these applications, only one

W7753A Excel 10 controller can be powered by each

transformer.

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

24 VAC

120/240 VAC

TRANSFORMER

W7753A

2524

EARTH

GROUND

EARTH

GROUND

EARTH

GROUND

M12682

Fig. 5. Power wiring details for two or more Excel 10s per transformer.

NOTES: (For Communications Wiring)

—

All field wiring must conform to local codes and

ordinances (or as specified on the installation

drawings).

24 VAC

LINE VOLTAGE

GREATER

THAN 150 VAC

—

Approved cable types for E-Bus communications

wiring is Level IV 22 AWG (0.34 mm ) plenum

TRANSFORMER

W7753A

and non-plenum rated unshielded, twisted pair,

solid conductor wires. For nonplenum areas, U.S.

part AK3781 (one pair) or U.S. part AK3782 (two

pair) can be used. In plenum areas, U.S. part

AK3791 (one pair) or U.S. part AK3792 (two pair)

can be used.

Unswitched 24 Vac power wiring can be run in the

same conduit as the E-Bus cable.

Do not bundle output wires with sensor, digital

EARTH

GROUND

—

input or communications E-Bus wires.

Do not use different wire types or gauges on the

same E-Bus segment. The step change in line

impedance characteristics would cause unpre-

dictable reflections on the E-Bus. When using dif-

ferent types is unavoidable, use a Q7751A Router

at the junction.

In noisy (high EMI) environments, avoid wire runs

parallel to noisy power cables, motor control cen-

ters, or lines containing lighting dimmer switches,

and keep at least 3 in. (76 mm) of separation

between noisy lines and the E-Bus cable.

Each daisy-chained E-Bus segment that is on one

side of a Q7751A,B Router (can contain up to 60

Excel 10s) and has a length greater than 1640 ft.

(500m) must have two E-Bus 209541B

Termination Modules, one at each end of the

daisy-chain wiring run.

EARTH

GROUND

IF THE W7750 CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE

PRIMARY POWER IS MORE THAN 150 VOLTS, GROUND ONE SIDE OF

TRANSFORMER SECONDARY.

M12680

Fig. 6. Transformer power wiring details for one Excel 10

used in UL 1995 equipment (U.S. only).

—

Communications

Refer to E-Bus Wiring Guidelines, form 74-2865, for a

complete description of E-Bus network topology rules.

Approved cable types for E-Bus communications wiring are

Level IV 22 AWG (0.34 mm ) plenum and non-plenum rated

unshielded, twisted pair, solid conductor wire. For nonplenum

areas, U.S. part AK3781 (one pair) or U.S. part AK3782 (two

pair) can be used. In plenum areas, U.S. part AK3791 (one

pair) or U.S. part AK3792 (two pair) can be used.

Communications wiring can be run in a conduit, if needed,

with non-switched 24 Vac or sensor wiring. If a longer E-Bus

network is required, a Q7740A 2-way or Q7740B 4-way

repeater can be added to extend the length of the E-Bus. Also

a Q7751A Router can be added to partition the system into

two segments and effectively double the length of the E-Bus.

Only one router is allowed with each Excel 10 Zone Manager,

and each network segment can have a maximum of one

repeater.

—

Make sure that neither of the E-Bus wires is

grounded.

NOTE: If a 209541B Termination Module is required at a the

UV controller, connect two of the three termination

module wires to the E-Bus terminals. Selecting the

appropriate two wires depends on the E-Bus network

topology. Refer to the E-Bus Wiring Guidelines, form

74-2865, and the Excel 10 FTT Termination Module

Installation Instructions, form 95-7554. For example,

using a doubly terminated daisy-chained bus topol-

ogy, if controllers are on either end of an E-Bus wire

run, mount the termination module on the appropri-

ate terminals as shown in Fig. 7.

Pull the cable to each device on the E-Bus and connect to

communication terminals 14 and 15 (W7753A).

95-7520—02

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

W7753A

1415

ORANGE

BROWN

PART NO. 209541B

TERMINATION

MODULE

PART NO. 209541B

TERMINATION

MODULE

ORANGE

M12690

Fig. 7. Termination modules (place a wire nut on each remaining wire that is not connected to a controller or device).

NOTE: When two or more wires are to be attached to the same terminal, other than 14 AWG (2.0 mm²), be sure to twist them

together. Deviation from this rule can result in improper electrical contact. See Fig. 8.

Wire to the terminal blocks as follows:

1. Strip 3/8 in. (10 mm) insulation from the conductor.

2. Insert the wire in the required terminal location and

tighten the screw to complete the termination.

3. If two or more wires are being inserted into one terminal

Wiring Details

The W7753A Controller has the terminal arrangements shown

in Fig. 9 through 14. Connection for operator access to the

E-Bus is provided by plugging the Serial LonTalk® Adapter

(SLTA) connector into the E-Bus jack.

location, strip 1/2 in. (13 mm) of insulation from the con-

ductors then twist the wires together a minimum of three

turns before inserting them.

4. Cut the twisted end of the wires to 3/16 in. (5 mm)

before inserting them into the terminal and tightening

the screw.

5. Pull on each wire in all terminals to check for good

mechanical connection.

NOTE: If an Excel 10 Controller or Zone Manager is not

connected to a good earth ground, the controller

internal transient protection circuitry is compromised

and the function of protecting the controller from

noise and power line spikes cannot be fulfilled. This

can result in a damaged circuit board and require

replacement of the controller. Refer to job drawings

for specific installation wiring diagrams.

TWO 14 AWG

(2.0 MM²) WIRES

3/8

(10)

1. STRIP 3/8 IN. (10 MM) FROM WIRES

TO BE ATTACHED AT ONE TERMINAL.

2. TWIST WIRES TOGETHER

WITH PLIERS (A MINIMUM

OF THREE TURNS).

3. CUT TWISTED END OF WIRES TO 3/16 IN. (5 MM)

BEFORE INSERTING INTO TERMINAL AND TIGHTENING

SCREW. THEN PULL ON EACH WIRE IN ALL TERMINALS

TO CHECK FOR GOOD MECHANICAL CONNECTION.

M10086

Fig. 8. Attaching two or more wires at terminal blocks.

95-7520—02

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

WINDOW CONTACT

(CONTACT CLOSED =

WINDOWCLOSED)

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

OCCUPANCY SENSOR

(CONTACT CLOSED =

OCCUPIED)

24 VAC

TRIAC EQUIVALENT CIRCUIT

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

W7753A

UNIT

VENTILATOR

CONTROLLER

E-BUS

TRIAC EQUIVALENT CIRCUIT

W7753A

10 11 12 13 14 15 J3

UNIT

VENTILATOR

CONTROLLER

E-BUS

9 10

OUTSIDE

AIR CO

SENSOR

10 11 12 13 14 15 J3

TR23-F5

WALL MODULE

M29164

E-BUS

Fig. 9. Typical W7753A unit ventilator application wiring

diagram with T7770F wall module. (For note 2, refer to

Fig. 8.)

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM²)

WITH A MINIMUM OF 18 AWG (1.O MM²), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED

TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

CONTACTS MUST BE SUITABLE FOR DRY SWITCHING, 5V AT 10 mA. USE

SEALED TYPE, GOLD FLASHED OR PIMPLED CONTACTS.

M12692

Fig. 10. Typical window and occupancy sensor wiring

diagram. (For note 2, refer to Fig. 8.)

95-7520—02

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

MMC325 PNEUMATIC

TRANSDUCER

W7753A

TRIAC EQUIVALENT CIRCUIT

UNIT

VENTILATOR

CONTROLLER

PNEUMATIC

VALVE

E-BUS

24 VAC

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

10 11 12 13 14 15 J3

C7600C

E-BUS

HUMIDITY

(4 TO 20mA)

C7600C

W7753A UNIT

VENTILATOR

CONTROLLER

ENTHALPY

(4 TO 20mA)

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE

THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM²) WITH

A MINIMUM OF 18 AWG (1.O MM²), FOR EARTH GROUND WIRE.

MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN;

REVERSING TERMINATIONS RESULTS IN EQUIPMENT

MALFUNCTION.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED

TOGETHER BEFORE INSERTIONINTO THE TERMINAL BLOCK.

M12695

OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER.

Fig. 12. Typical 4 to 20 mA Humidity and Enthalpy Sensor

to W7753A. (For note 2, refer to Fig. 8.)

USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE

MUST BE 6 FT. (1.8M) OR LONGER.

M12693

Fig. 11. Typical Pneumatic Transducer to W7753A.

95-7520—02

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

ML7984B

PWM VALVE ACTUATOR

24 VAC

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

T6 T5

PWM VALVE

ACTUATOR

TRIAC EQUIVALENT CIRCUIT

OFF

W7753A

UNIT

CONFIGURATION DIP SWITCHES

(LOCATED ADJACENT TO THE

INPUT TERMINAL BLOCK)

VENTILATOR

CONTROLLER

EARTH GROUND WIRE LENGTH SHOULD BE HELD

TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE

AVAILABLE, UP TO 14 AWG (2.O MM²) WITH A MINIMUM

OF 18 AWG (1.O MM²), FOR EARTH GROUND WIRE.

E-BUS

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES

MUST BE TWISTED TOGETHER BEFORE INSERTION

INTO THE TERMINAL BLOCK.

10 11 12 13 14 15 J3

MAKE SURE ALL TRANSFORMER/POWER WIRING

IS AS SHOWN:REVERSING TERMINATIONS WILL

RESULT IN EQUIPMENT MALFUNCTION.

E-BUS

TURN POWER OFF BEFORE SETTING THE DIP SWITCHES.

M12694

Fig. 13. Typical PWM Valve Actuator to W7753A. (For note 2, refer to Fig. 8.)

NOTE: Make sure to set the Configuration DIP Switch as shown in Fig. 13. Switches 1 through 3 set the timing of the ML7984B

valve actuator to match the W7753A outputs (0.1 sec. Min. with a max. time of 25.6 sec.).

Switch 4 determines the action of the actuator (Off = Direct Acting, On = Reverse Acting).

CHECKOUT

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

W7753A Checkout

Step 1. Check Installation and Wiring

Inspect all wiring connections at the W7753A terminals and

verify compliance with installation job drawings. If any wiring

changes are required, first be sure to remove power from the

controller before starting work. Pay particular attention to:

— 24 Vac power connections. Verify that multiple controllers

transformer secondary connected to the same input

terminal numbers on each W7753A. See Fig. 5. (Controller

configurations are not necessarily limited to three

controllers, but the total power draw including accessories

cannot exceed 100 VA when powered by the same

transformer (U.S. only). See System Engineering,

form 74-2964, for power wiring recommendations.

— Controller wiring. Be sure that each controller is wired

(terminal 1) on the W7753A to a verified earth ground

using a wire run as short as possible with the heaviest

gauge wire available, up to 14 AWG (2.0 mm²) with a

minimum of 18 AWG (1.0 mm²) for each controller in the

group. See Fig. 4.

TRIAC EQUIVALENT CIRCUIT

W7753A

UNIT

VENTILATOR

CONTROLLER

E-BUS

10 11 12 13 14 15 J3

C7600B

HUMIDITY

SENSOR

(2 TO 10 VOLT)

E-BUS

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE

THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM²) WITH

A MINIMUM OF 18 AWG (1.O MM²), FOR EARTH GROUND WIRE.

— Verify Triac wiring to external controllers uses the proper

load power/24 Vac hot terminal (terminal 25 on the

W7753A).

TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED

TOGETHER BEFORE INSERTIONINTO THE TERMINAL BLOCK.

M12696

NOTE: All wiring must comply with applicable electrical

codes and ordinances or as specified on installation

wiring diagrams.

Fig. 14. Typical 2 to 10 Volt DC humidity sensor to

W7753A. (For note 2, refer to Fig. 8.)

95-7520—02

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

•

Node Number: This is the Excel 10 node that has the alarm

condition (see Network Statics).

Verify Termination Module Placement

The installation wiring diagrams should indicate the locations

for placement of 209541B Termination Module(s). Refer to the

E-Bus Wiring Guidelines, form 74-2865, and the Excel 10 FTT

Termination Module Installation Instructions, form 95-7554.

Correct placement of the termination module(s) is required for

proper E-Bus communications.

Alarm Type: The specific alarm being issued. An Excel 10 can

provide the alarm types listed in T a ble 1.

Broadcasting the Service Message

The Service Message allows a device on the E-Bus to be

positively identified. The Service Message contains the

controller ID number and, therefore, can be used to confirm

the physical location of a particular Excel 10 in a building.

Step 2. Startup

W7753A CONTROLLER STATUS LED

The LED on the front and center of a W7753A Controller

provides a visual indication of the status of the controller. See

Fig. 15. When the W7753A receives power, the LED should

appear in one of the following allowable states:

There is one method of broadcasting the Service Message

from an Excel 10 W7753A Controller. This uses a hardware

push button on the side of the controller (see Fig. 16).

When an Assign ID command is issued from the

commissioning tool, the node goes into the

SERVICE_MESSAGE mode for five minutes. In the

SERVICE_MESSAGE mode, pressing the service pin on the

controller or the bypass button on a wall module causes the

Service Message to be broadcast on the network. All other

functions are normal in the SERVICE_MESSAGE mode.

1. Off—no power to the processor.

2. Continuous On—processor is in initialized state.

3. Slow Blink—controlling, normal state.

4. Fast Blink—when the Excel 10 has an alarm condition.

W7753A

Step 3. I/O Tests

The controller must be configured using the Excel 10 E-Vision

PC configuration tool. Once this is done, the W7753A can be

commanded to MANUAL mode, and each output can be

exercised/viewed to verify proper wiring connections and

equipment operation. See the Excel 10 E-Vision Users Guide,

form 74-2588 for details on configuring and testing W7753A

Controllers.

OUT

DI-4

OUT

GND

OUT

DI-3

DI-2

OUT

GND

OUT

DI-1

OUT

COM

SERVICE

BUTTON

LED

BYP

ASS

SNSR

GND

SET

AI-1

GND

A1-2

AI-3

GND

OHM

AI-4

V/mA ^22VDC

OHM

E-BUS

V/mA

E-BUS

JACK

OUT

STATUS

LED

M12697

Fig. 15. LED location on W7753A.

ALARMS

When an Excel 10 has an alarm condition, it reports it to the

central node on the E-Bus (typically, the Excel 10 Zone

Manager, or Small Building Controller). See T a ble 1. The

information contained in an alarm message follows:

M10094

Fig. 16. Location of the service pin button.

•

Subnet Number: This is the E-Bus subnet that contains the

Excel 10 node that has the alarm condition. Subnet 1 is on

the Zone Manager side of the router; Subnet 2 is on the

other side of the router.

Step 4. Verify Sequences of Operation

For the detailed descriptions of the sequences of operation,

see the Excel 10 Unit Ventilator System Engineering,

form 74-2964 Appendix B.

95-7520—02

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

Table 1. Excel 10 Alarms.

Alarm type

number

Name of alarm or error bit

NO_ALARM

No alarms presently detected.

INPUT_NV_FAILURE

One or more NV inputs have failed while receiving an update within their

specified FAILURE_DETECT_TIME.

NODE_DISABLED

The control algorithm stopped because the controller is in DISABLED_MODE,

or FACTORY_TEST mode. The control is shut down and disabled until power is

cycled or the node is reset. See NOTE 1 below.

SENSOR_FAILURE

One or more sensors have failed.

FROST_PROTECTION_ALARM 4

The space temperature is below the frost alarm limit 42.8°F (6°C) when the

mode is FREEZE_PROTECT. The alarm condition remains until the

temperature exceeds the alarm limit plus hysteresis.

INVALID_SET_POINT

LOSS_OF_AIR_FLOW

One of the Setpoints is not in the valid range.

The Fan Status DI indicates that there is no air flow when the node is

commanding the fan to run. The control is shut down and disabled until power is

cycled or the node is reset. The alarm is not issued until FanFailTime seconds

have elapsed since the loss-of-flow condition was first reported.

DIRTY_FILTER

SMOKE_ALARM

IAQ_OVERRIDE

The pressure drop across the filter exceeds the limit and the filter requires

maintenance. The control runs normally.

The smoke detector has detected smoke and the node has entered an

emergency state.

The indoor air quality sensor has detected that the indoor air quality is poorer

than the desired standard and additional outdoor air is being brought into the

conditioned space.

LOW_LIM_ECON_CLOSE

The economizer has to close beyond the minimum position to prevent the

discharge air temperature from going below the discharge temperature low

limit.

DRIP_PAN_FULL

FREEZE_STAT

OAQ_ALARM

Drip pan maintenance is required. Cooling control is disabled. Fan continues to

run.

Very Cold Temperature detected inside the Unit Ventilator Cabinet. Control

closes OA Damper, and open heat valve.

The configured outdoor air quality sensor has detected CO or CO²levels that

exceeds OaQStPt (plus 30 ppm hysteresis). When there is an OAQ_ALARM,

the economizer damper is closed.

RETURN_TO_NORMAL

128

255

Return to no alarm after being in an alarm condition. This code is added

numerically to another alarm code to indicate that the alarm condition has

returned to normal.

ALARM_NOTIFY_DISABLED

The alarm reporting was turned off by the nviManualMode. No more alarms are

reported until nviManualMode turns on alarm reporting or upon application

restart.

NOTE: The node can be reset by switching the node to MANUAL and then switching to the normal operating mode

(using DestManMode).

Also, the Excel 10 network variables, AlarmLogX, where X is 1 through 5, that store the last five alarms to occur in the

controller, are available. These points can be viewed through XBS, XI584 or E-Vision.

95-7520—02

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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

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95-7520—02

EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

Automation and Control Solutions

Honeywell International Inc.

1985 Douglas Drive North

Golden Valley, MN 55422

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Toronto, Ontario M1V 4Z9

Honeywell GmbH

Böblinger Straße 17

D-71101 Schönaich

customer.honeywell.com

® U.S. Registered Trademark

95-7520—02 K.K. Rev. 03-09

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