®
Chromalox
Installation, Operation
4
NWH
and
(Supersedes PE414-2)
PE414-3
RENEWAL PARTS IDENTIFICATION
161-304777-001
MAY, 2007
TM
Circulation
Heaters for Oil or Water Heating
Dimensions (Inches)
Specifications – Table A
Specifications – Table B
7-7/8"
Rotatable
6"
Dim. (In.)
Dim. (In.)
Terminal
Cover
A
B
Model
PCN
A
B
Model
PCN
Cast Iron Body / Oil .5 to 10 kW
Cast Iron Body / Oil .5 to 10 kW
4"
1
2
8 / "
29 19
29 19
NWHOSR-06-04P5-E1 100108
NWHOSR-06-04P5-E1 100116
32 19
32 19
NWHOSR-06-04P5-E2 100255
NWHOSR-06-04P5-E2 100263
1" Conduit
Opening
11"
41 303/4 NWHOSR-06-005P-E1 100124
44 303/4 NWHOSR-06-005P-E2 100271
Outlet
1" FNPT
29 19
29 19
NWHOSR-06-006P-E1 100132
NWHOSR-06-006P-E1 100140
32 19
32 19
NWHOSR-06-006P-E2 100280
NWHOSR-06-006P-E2 100298
A
A
41 303/4 NWHOSR-06-010P-E1 100159
44 303/4 NWHOSR-06-010P-E2 100300
B
B
Galvanized Body / Water .5 to 40 kW
Galvanized Body / Water .5 to 40 kW
29 19
29 19
NWHSRG-06-018P-E1 100010
NWHSRG-06-018P-E1 100028
32 19
32 19
NWHSRG-06-018P-E2 100327
NWHSRG-06-018P-E2 100343
Inlet
1" FNPT
41 303/4 NWHSRG-06-020P-E1 100036
44 303/4 NWHSRG-06-020P-E2 100351
2 Mtg. Lugs
2"-13 x / " Deep
29 19
29 19
NWHSRG-06-024P-E1 100044
NWHSRG-06-024P-E1 100079
32 19
32 19
NWHSRG-06-024P-E2 100360
NWHSRG-06-024P-E2 100378
1
2
1
/
1" FNPT Pipe Plug
(or Inlet)
6"
41 303/4 NWHSRG-06-040P-E1 100095
44 303/4 NWHSRG-06-040P-E2 100386
E1
E2
GENERAL
READ ALL INSTRUCTIONS BEFORE USE
IMPORTANT: It is the responsibility of the purchaser of
the heater to make the ultimate choice of sheath
material based upon his knowledge of the chemical
composition of the corrosive solution, character of the
materials entering the solution, and controls which he
maintains on the process.
FIRE/EXPLOSION HAZARD. Ordinary location
heaters (designated E1) are not intended for use in
hazardous atmospheres where flammable vapors,
gases, liquids or other combustible atmospheres are
present as defined in the National Electrical Code.
Failure to comply can result in personal injury or
property damage.
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do
so could result in personal injury or property dam-
age. Heater must be installed or serviced by a
qualified person in accordance with the National
Electrical Code. NFPA 70.
This design has the versatility of field adjustments of voltage
kW through various wiring combinations.
The NWHSRG model is a general purpose water circulation
heater intended for indoor use. E2 designs have a Moisture
Resistant/Explosion Resistant enclosure. Designs are up to 40kW
- DO NOT USE THE NWHSRG MODEL FOR OIL.
The NWHOSR model is a general-purpose regular and fuel oil
solution circulation heater intended for use indoors. E2 designs
have a Moisture Resistant/Explosion Resistant enclosure. Designs
are up to 10kW - DO NOT USE THE NWHOSR MODEL FOR
WATER. Ensure the wiring guide for oil is used for the correct
wiring diagram.
The system designer is responsible for the safety
of this equipment and should install adequate
back-up controls and safety devices with their
electric heating equipment. Where the conse-
quences of failure could result in personal injury or
property damage, back-up controls are essential.
Both the NWHSRG and NWHOSR use six INCOLOY® sheath
elements welded to a steel 2.5” screw plug. The vessel is cast iron
and is surrounded by 1.5” insulation and a sheet metal jacket. For
water applications, the vessel has a galvanized coating. A J-type
thermocouple in a thermowell is standard. These versaTHERMTM
heaters are designed for 150 psig max. at 35°F min. to 300°F max.
If foreign material is to be carried by the liquid flow, install
suitable filters in the inlet pipe to the heater.
Ensure the temperature/pressure is controlled below the vapor
point of the liquid at all times and is within the temperature/pres-
sure ratings for this heater.
Heating elements must be completely immersed in liquid when
energized.
© 2010 Chromalox, Inc.
Download from Www.Somanuals.com. All Manuals Search And Download.
WIRING
Contactor
L1
L2
L3
ELECTRIC SHOCK HAZARD. Any installation involv-
To equipment disconnect
with overcurrent protection
Heater
ing electric heaters must be performed by a quali-
fied person and must be effectively grounded in
accordance with the National Electrical Code to
eliminate shock hazard.
Thermostat
Control voltage
L1
1Ø or 3Ø: Refer to wiring
diagram designated from the
the Wiring Guide for specific
wiring directions to
L2
Type "J"
thermocouple
is standard.
L1
the heater.
or
Temperature control
Ensure the correct Wiring Guide is used for your
heated medium and model type, and ensure the
correct wiring diagram is used. Miswiring could
result in an unsafe wattage.
}
L2
Figure 1
Thermocouple
1. Be sure line voltage matches your intended voltage and does
not exceed the max voltage on the nameplate.
2. Electric wiring to heater must be installed in accordance with
local and National Electrical Codes by a qualified person as
defined in the NEC.
Note: Dotted lines indicate “customer furnished.” Complete power/temperature
control panels or components are available. Contact Chromalox 1-800-443-2640
for more information and assistance.
3. Power controllers must be used with this product.
4. Electrical wiring to heater should be with rigid conduit or flex-
ible conduit to keep corrosive vapors and liquids out of the
electrical enclosure. If high humidity is encountered, the con-
duit should slope down away from the heater.
5. Refer to appropriate wiring diagram for your model heater
from the Wiring Guide (on next two pages).
The specific Wiring Guide provides easy to follow steps to
determine the appropriate wiring diagram for your heater instal-
lation. Figure 1 may be referenced as a general diagram of how
a contactor and temperature control are used in conjunction
with the specific wiring diagrams.
6. Use ground fault protection equipment where electrical insula-
tion failure can cause process problems.
7. When element wattages are not equal, heaters must not be con-
nected in series.
8. If flexible cord is employed, a watertight connector should be
used for entry of the cord into the electrical enclosure. Outdoor
applications require liquid-tight conduit and connectors.
9. If application uses a standard PCN at different voltages and
kWs from the Wiring Guide, refer to the Customer Wiring
Guide Supplement if included with these instructions, or con-
tact Customer Service at (800) 368-2493.
3
Download from Www.Somanuals.com. All Manuals Search And Download.
WIRING GUIDE – OIL (NWHOSR)
Directions:
Step 1: Select the PCN number below which matches the PCN number on your heater.
Step 2: Choose your kW, Volts, phase, and number of circuits under your PCN number (you must know the kW and watt density
(watts/sq. in.) needs for your application).
Step 3: Note the Wiring diagram # for your selection.
Step 4: Go to Wiring Diagram sheet. Peel off the diagram that matches the # in step 3. Stick this to the inside of your electrical enclosure.*
Step 5: Peel off corresponding Volts, circuit-phase, and kW info from the Wiring Diagram sheet and stick to the designated spot on the
nameplate. (These labels will cover the maximum rating stamped on the nameplate.)**
Step 6: Wire Heater according to the sticker on the inside of your electrical enclosure (from step 4).
Oil Applications
Circuit-Phase (amps)
Oil Applications
Circuit-Phase (amps)
Approx. Watts
/Sq. In.
Wiring
Diag. #
Approx. Watts
/Sq. In.
Wiring
Diag. #
Watts-Volts
Watts-Volts
PCN 100108 (P/N 052-304749-001)
PCN 100255 (P/N 052-304749-301)
1-1Ph (38 amps)
PCN 100140 (P/N 052-304749-005)
PCN 100298 (P/N 052-304749-305)
1-3Ph (1.3 amps)
.5kW - 240V
2
#6
4.5kW - 120V
15
#7
.75kW - 120V
.75kW - 208V
1.5kW - 120V
1.5kW - 120V
1.5kW - 208V
1.5kW - 240V
1.5kW - 240V
2.25kW - 208V
2.25kW - 208V
3.0kW - 240V
3.0kW - 240V
4.5kW - 208V
4.5kW - 208V
4.5kW - 208V
4.5kW - 208V
6.0kW - 240V
6.0kW - 240V
6.0kW - 240V
6.0kW - 240V
6.0kW - 480V
6.0kW - 480V
1-1Ph (7 amps)
1-3Ph (2.1 amps)
1-1Ph (13 amps)
2-1Ph (2 x 7 amps)
1-3Ph (4.2 amps)
1-1Ph (7 amps)
1-3Ph (3.7 amps)
1-1Ph (11 amps)
1-3Ph (7 amps)
1-1Ph (13 amps)
1-3Ph (8 amps)
1-1Ph (22 amps)
2-1Ph (2 x 11 amps)
1-3Ph (13 amps)
2-3Ph (2 x 7 amps)
1-1Ph (25 amps)
2-1Ph (2 x 13 amps)
1-3Ph (15 amps)
2-3Ph (2 x 8 amps)
1-1Ph (13 amps)
1-3Ph (8 amps)
5
5
5
5
5
5
5
15
15
20
20
15
15
15
15
20
20
20
20
20
20
#13*
#12*
#7
#8
#4
PCN 100116 (P/N 052-304749-002)
PCN 100263 (P/N 052-304749-302)
1-3Ph (2 amps)
1-1Ph (11 amps)
1-3Ph (7 amps)
1-1Ph (19 amps)
2-1Ph (2 x 10 amps)
1-3Ph (11 amps)
2-3Ph (2 x 6 amps)
1.5kW - 480V
2.5kW - 240V
2.5kW - 240V
4.5kW - 240V
4.5kW - 240V
4.5kW - 240V
4.5kW - 240V
4.5kW - 480V
4.5kW - 480V
5
#6
15
15
15
15
15
15
15
15
#13*
#11*
#7
#8
#1
#2
#10
#3
#10
#3
#13*
#11*
#13*
#11*
#7
#8
#1
#2
#7
#8
#1
#2
#10
#3
1-1Ph (10 amps)
1-3Ph (6 amps)
PCN 100124 (P/N 052-304749-003)
PCN 100271 (P/N 052-304749-303)
1-1Ph (42 amps)
1-3Ph (14 amps)
1-1Ph (21 amps)
5.0kW - 120V
5.0kW - 208V
5.0kW - 240V
5.0kW - 240V
11
11
11
11
#7
#4
#10
#3
1-3Ph (13 amps)
PCN 100132 (P/N 052-304749-004)
PCN 100280 (P/N 052-304749-304)
1-1Ph (25 amps)
3.0kW - 120V
3.0kW - 208V
6.0kW - 120V
6.0kW - 208V
6.0kW - 208V
20
20
20
20
20
#13*
#12*
#8
1-3Ph (9 amps)
PCN 100159 (P/N 052-304749-006)
PCN 100300 (P/N 052-304749-306)
1-1Ph (21 amps)
2-1Ph (2 x 11 amps)
1-3Ph (7 amps)
1-1Ph (11 amps)
1-3Ph (7 amps)
1-1Ph (42 amps)
2-1Ph (2 x 21 amps)
1-3Ph (25 amps)
1-1Ph (50 amps)
1-3Ph (17 amps)
#4
2.5kW - 120V
2.5kW - 120V
2.5kW - 208V
2.5kW - 240V
2.5kW - 240V
10kW - 240V
10kW - 240V
10kW - 240V
10kW - 240V
10kW - 480V
10kW - 480V
15
15
15
15
15
21
21
21
21
21
21
#7
#8
#4
#10
#3
#7
#8
#1
#2
#10
#3
2-3Ph (2 x 9 amps)
#5
* Half of the heating elements are used
** For E2, affix to sheet metal on outside of enclosure
2-3Ph (2 x 13 amps)
1-1Ph (21 amps)
1-3Ph (13 amps)
4
Download from Www.Somanuals.com. All Manuals Search And Download.
WIRING GUIDE – WATER (NWHSRG)
Directions:
Step 1: Select the PCN number below which matches the PCN number on your heater.
Step 2: Choose your kW, Volts, phase, and number of circuits under your PCN number (you must know the kW and watt density
(watts/sq. in.) needs for your application).
Step 3: Note the Wiring diagram # for your selection.
Step 4: Go to Wiring Diagram sheet. Peel off the diagram that matches the # in step 3. Stick this to the inside of your electrical enclosure.**
Step 5: Peel off corresponding Volts, circuit-phase, and kW info from the Wiring Diagram sheet and stick to the designated spot on the
nameplate. (These labels will cover the maximum rating stamped on the nameplate.)
Step 6: Wire Heater according to the sticker on the inside of your electrical enclosure (from step 4).
Water Applications
Circuit-Phase (amps)
Water Applications
Circuit-Phase (amps)
Approx. Watts
/Sq. In.
Wiring
Diag. #
Approx. Watts
/Sq. In.
Wiring
Diag. #
Watts-Volts
Watts-Volts
PCN 100010 (054-304745-001)
PCN 100327 (054-304745-301)
PCN 100079 (054-304745-005)
PCN 100378 (054-304745-305)
.5kW - 240V
.75kW - 120V
.75kW - 208V
1.5kW - 120V
1.5kW - 120V
1.5kW - 208V
1.5kW - 240V
1.5kW - 240V
2.25kW - 208V
2.25kW - 208V
3.0kW - 240V
3.0kW - 240V
4.5kW - 208V
4.5kW - 208V
4.5kW - 208V
4.5kW - 208V
6.0kW - 240V
6.0kW - 240V
6.0kW - 240V
6.0kW - 240V
6.0kW - 480V
6.0kW - 480V
12kW - 480V
12kW - 480V
24kW - 480V
24kW - 480V
24kW - 480V
1-3Ph (1.3 amps)
1-1Ph (7 amps)
2
5
5
5
5
5
5
5
15
15
20
20
15
15
15
15
20
20
20
20
20
20
78
78
78
78
78
#6
4.5kW - 120V
9.0kW - 240V
9.0kW - 240V
18kW - 240V
18kW - 240V
18kW - 240V
1-1Ph (38 amps)
15
59
59
59
59
59
#7
#13*
#12*
#7
#8
#4
1-1Ph (38 amps)
1-3Ph (22 amps)
2-1Ph (2 x 38 amps)
1-3Ph (44 amps)
2-3Ph (2 x 22 amps)
PCN 100028 (054-304745-002)
PCN 100343 (054-304745-302)
1-3Ph (4 amps)
1-1Ph (11 amps)
1-3Ph (6 amps)
1-1Ph (19 amps)
2-1Ph (2 x 10 amps)
1-3Ph (11 amps)
2-3Ph (2 x 6 amps)
1-1Ph (10 amps)
1-3Ph (6 amps)
1-1Ph (19 amps)
1-3Ph (11 amps)
1-1Ph (38 amps)
2-1Ph (2 x 19 amps)
1-3Ph (22 amps)
2-3Ph (2 x 11 amps)
PCN 100036 (054-304745-003)
PCN 100351 (054-304745-303)
1-1Ph (42 amps)
#13*
#11*
#8
#1
#2
1-3Ph (2.1 amps)
1-1Ph (13 amps)
2-1Ph (2 x 7 amps)
1-3Ph (4.2 amps)
1-1Ph (7 amps)
1-3Ph (3.7 amps)
1-1Ph (11 amps)
1-3Ph (7 amps)
#10
#3
#13*
#11*
#13*
#11*
#7
#8
#1
#2
#7
#8
#1
#2
#10
#3
#13*
#11*
#8
#1
#2
1.5kW - 480V
2.5kW - 240V
2.5kW - 240V
4.5kW - 240V
4.5kW - 240V
4.5kW - 240V
4.5kW - 240V
4.5kW - 480V
4.5kW - 480V
9.0kW - 480V
9.0kW - 480V
18kW - 480V
18kW - 480V
18kW - 480V
18kW - 480V
5
#6
15
15
15
15
15
15
15
15
59
59
59
59
59
59
#13*
#11*
#7
#8
#1
#2
#10
#3
#13*
#11*
#7
1-1Ph (13 amps)
1-3Ph (8 amps)
1-1Ph (22 amps)
2-1Ph (2 x 11 amps)
1-3Ph (13 amps)
2-3Ph (2 x 7 amps)
1-1Ph (25 amps)
2-1Ph (2 x 13 amps)
1-3Ph (15 amps)
2-3Ph (2 x 8 amps)
1-1Ph (13 amps)
1-3Ph (8 amps)
1-1Ph (25 amps)
1-3Ph (15 amps)
2-1Ph (2 x 25 amps)
1-3Ph (29 amps)
2-3Ph (2 x 15 amps)
PCN 100095 (054-304745-006)
PCN 100386 (054-304745-306)
1-1Ph (21 amps)
2-1Ph (2 x 11 amps)
1-3Ph (7 amps)
#8
#1
#2
5.0kW - 120V
5.0kW - 208V
5.0kW - 240V
5.0kW - 240V
20kW - 240V
20kW - 240V
11
11
11
11
80
80
#7
#4
#10
#3
#8
#2
1-3Ph (14 amps)
1-1Ph (21 amps)
1-3Ph (13 amps)
2.5kW - 120V
2.5kW - 120V
2.5kW - 208V
2.5kW - 240V
2.5kW - 240V
10kW - 240V
10kW - 240V
10kW - 240V
10kW - 240V
10kW - 480V
10kW - 480V
20kW - 480V
20kW - 480V
40kW - 480V
40kW - 480V
15
15
15
15
15
21
21
21
21
21
21
80
80
80
80
#7
#8
#4
#10
#3
#7
#8
#1
#2
#10
#3
#13*
#11*
#8
2-1Ph (2 x 42 amps)
2-3Ph (2 x 25 amps)
PCN 100044 (054-304745-004)
PCN 100360 (054-304745-404)
1-1Ph (25 amps)
1-3Ph (9 amps)
1-1Ph (2 x 25 amps)
1-3Ph (17 amps)
1-1Ph (11 amps)
1-3Ph (7 amps)
3.0kW - 120V
3.0kW - 208V
6.0kW - 120V
6.0kW - 208V
6.0kW - 208V
12kW - 240V
24kW - 240V
24kW - 240V
20
20
20
20
20
78
78
78
#13*
#12*
#8
#4
#5
#11*
#9
#2
1-1Ph (42 amps)
2-1Ph (2 x 21 amps)
1-3Ph (25 amps)
2-3Ph (2 x 13 amps)
1-1Ph (21 amps)
1-3Ph (13 amps)
1-1Ph (42 amps)
1-3Ph (25 amps)
2-1Ph (2 x 42 amps)
2-3Ph (2 x 25 amps)
2-3Ph (2 x 9 amps)
1-3Ph (29 amps)
3-1Ph (3 x 34 amps)
2-3Ph (2 x 29 amps)
* Half of the heating elements are used
** For E2, affix to sheet metal on outside of enclosure
#2
5
Download from Www.Somanuals.com. All Manuals Search And Download.
WIRING
}
}
}
6
Download from Www.Somanuals.com. All Manuals Search And Download.
PRE-OPERATION
1. Follow the instructions for operation of your application.
Ensure your procedure includes:
A. Make sure all electrical and piping connections are tight.
B. Remove all air from the heater and piping.
OPERATION
Important: NWHOSR/NWHSRG Circulation Heaters
If the heater is not properly submerged, the heat-
ing elements will overheat and could result in a fire
or damaged equipment.
®
are equipped with INCOLOY heating elements and
cast iron heating chambers (galvanized for the
NWHSRG). It is the responsibility of the purchaser of
the heater to know the chemical composition of the
corrosive solution and the character of the materi-
als entering the solution as well as the corrosive
effect of the solution upon the heating elements
and chamber.
1. Do not heat solutions that are corrosive to the heating element
sheath or the heating chamber.
2. Terminal ends of heater must be protected from drippings, con-
densation, spray or direct spill-over of material. Their presence
at the terminals may damage heater electrical insulation.
3. If foreign material is carried by the liquid flow, install suitable
filters in the inlet pipeline to the heater. Liquid flow to the
heater should be free of suspended solids.
Sheath corrosion can result in a ground fault which
depending upon the solution being heated, can
cause an explosion or fire.
4. Do not allow heater to operate when liquid flow is interrupted.
5. The NWHSRG/NWHOSR is designed as a flow through
heater. The chamber must be full for safe operation.
MAINTENANCE
Note: User is responsible for maintenance schedule based on
their knowledge of the heated medium and operating conditions.
3. Periodically check temperature control operation to insure
accurate and safe process operation.
ELECTRIC SHOCK HAZARD. Disconnect all power
before servicing heater. Failure to do so could
result in personal injury or property damage.
Heater must be serviced by a qualified person in
accordance with the National Electrical Code.
NFPA 70.
4. Check all electrical connections periodically and retighten con-
nections which may have loosened in service. Replace wire
and wire terminals which show signs of oxidation which would
interfere with establishment of reliable electrical connections.
5. Correct any excessive leaking. Also refer to the last step in the
installation section regarding adequate collection/drainage.
6. Reinstallation steps.
1. Remove heating element assembly periodically to check heater
sheath for sealing, corrosion or excessive oxidation. Correct
operating conditions to minimize sheath deterioration. Refer to
warnings in operation section.
A. Reseal thread fittings with adequate seal material for the
pressure/temperature rating on your heater.
B. Refer to the pre-operation section.
2. Drain heater periodically to remove sludge deposit. Deposits
can act as an insulator and shorten heater life.
7
Download from Www.Somanuals.com. All Manuals Search And Download.
RENEWAL PARTS IDENTIFICATION
Replacement
Immersion Heater
Parts Common To All PCNs
Description Standard
PCN
Thermocouple 12” (Type “J”) . . . . . . . . . . . . . . . . . . . . . .309-304460-012
Thermocouple 24” (Type “J”) . . . . . . . . . . . . . . . . . . . . . .309-304460-024
Bayonet Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .001-027343-007
NWHOSR-06-04P5-E1
NWHOSR-06-04P5-E1
NWHOSR-06-005P-E1
NWHOSR-06-006P-E1
NWHOSR-06-006P-E1
NWHOSR-06-010P-E1
NWHSRG-06-018P-E1
NWHSRG-06-018P-E1
NWHSRG-06-020P-E1
NWHSRG-06-024P-E1
NWHSRG-06-024P-E1
NWHSRG-06-040P-E1
NWHOSR-06-04P5-E2
NWHOSR-06-04P5-E2
NWHOSR-06-005P-E2
NWHOSR-06-006P-E2
NWHOSR-06-006P-E2
NWHOSR-06-010P-E2
NWHSRG-06-018P-E2
NWHSRG-06-018P-E2
NWHSRG-06-020P-E2
NWHSRG-06-024P-E2
NWHSRG-06-024P-E2
NWHSRG-06-040P-E2
100108
100116
100124
100132
100140
100159
100010
100028
100036
100044
100079
100095
100255
100263
100271
100280
100298
100300
100327
100343
100351
100360
100378
100386
156-304748-001
156-304748-002
156-304748-003
156-304748-004
156-304748-005
156-304748-006
156-304748-001
156-304748-002
156-304748-003
156-304748-004
156-304748-005
156-304748-006
156-304748-301
156-304748-302
156-304748-303
156-304748-304
156-304748-305
156-304748-306
156-304748-301
156-304748-302
156-304748-303
156-304748-304
156-304748-305
156-304748-306
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
00-003
TA - U0 - ?K
Litho in U.S.A.
Phone: 1-800-368-2493
Download from Www.Somanuals.com. All Manuals Search And Download.
|