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L. Trim all motor leads extending out of the conduit to

6 lengths. Strip off 3/8 of insulation at cut ends. Us-

ing the motor nameplate, previous notes, and marked

wires, reconnect the motor for the unit voltage rating

as indicated on the heater nameplate. Re-attach the

ground wire to the connection inside the enclosure.

Replace cover and tighten securely.

M. Check fan rotation by momentarily energizing the unit.

Air must exit at cabinet front. Reverse any 2 leads at

contactor or line supply disconnect to reverse rotation

of three phase motor.

3. Removal of fan blade does not require that the motor

wiring be disturbed. To clean, service or change the fan

blade proceed as follows:

A. Remove the four carriage bolts holding the motor base

in place on the cabinet platform. Mark the platform to

reposition at same location.

B. Loosen the four screws on the cabinet back holding

the fan guard in place.

C. Pull the motor to the rear extending the conduit con-

nection at the electrical enclosure. Fan blade and hub

set screws can now be accessed by tilting the guard

rearward at top or bottom back over the motor shell.

IV. ELECTRICAL COMPONENT SERVICING

EXPLOSION/ELECTRIC SHOCK HAZARD. Disconnect

all power before opening enclosure covers or ser-

vicing heater. Failure to comply could result in per-

sonal injury or property damage.

When provided, the following components are located in the

cast aluminum hazardous location enclosure. Remove cover

and retaining bolts to gain access the following items (See

Figure 16).

1. CONTROL TRANSFORMER

This item is located in the electrical enclosure. It may be

replaced while in the enclosure. To service or replace re-

move the quick connect wires and mark their locations.

Remove two screws which hold the transformer in place.

Note transformer orientation and voltage labels on top.

Replace transformer in the same orientation and connect

wires. Replace the cast aluminum cover and bolt down.

2. CONTACTOR

This component can be removed from the base plate

while in the enclosure. Follow the same steps as indi-

cated for the transformer replacement.

3. ALARM PILOT LAMP (OPTIONAL)

To replace the bulb, unscrew the red lens bezel while

holding the lock ring until disengaged. Avoid turning the

entire assembly which is held tight to the enclosure with

a locking nut on the inside of the enclosure. It must be

re-tightened if loosened before reuse. Replace the lamp

with a 656 type bulb at the correct control voltage for the

unit (120V or 24). Secure the lens cap (5 threads mini-

mum) against the locking ring and tighten securely be-

fore reenergizing unit. Lamp should flash on momentarily

when unit is energized. See renewal parts section for part

number of replacement bulbs.

Figure 14

CXH-A with Built in Disconnect Switch

(Must use HMK-00 Ceiling Mounting Kit)

Figure 15

CXH-A with Built in Thermostat

Содержание CXH-A-03

Страница 1: ...1 PF490 11 161 302421 004 June 2018 Installation and Operation Instructions CXH A Forced Air Heater CXH A 03 EP to CXH A 35 EP Class I Groups C D Div 1 2 Class II Groups E F G T3B 165 C 329 F ...

Страница 2: ... 575V 3Ø 32 25 590 840 133 19 1 8 23 7 8 21 3 1 2 13 5 8 CXH A 10 10 240V 1 or 3Ø 208 480 575V 3Ø 32 34 120 840 138 19 1 8 23 7 8 21 3 1 2 13 5 8 CXH A 15 15 208 240 480V 575V 3Ø 47 51 180 1450 150 25 27 7 8 21 4 13 32 17 5 8 CXH A 18 18 240V 3Ø 43 61 420 1400 165 25 27 7 8 21 4 13 32 17 5 8 CXH A 20 20 480 575V 3Ø 43 68 240 1400 165 25 27 7 8 21 4 13 32 17 5 8 CXH A 25 25 480 575V 3Ø 54 85 300 23...

Страница 3: ...t wiring and seals must meet NEC and local codes for hazardous lo cations 9 External line fusing or circuit breaker protection is re quired 10 High temperature cutout s must never be bypassed in the control circuit 11 Alarm pilot lamp if supplied will turn on if the high tem perature cutout s actuates Steady on lamp indicates temperature cutout s has tripped This could result if the heat exchanger...

Страница 4: ...ate thermostat on interior partition walls or posts away from cold drafts internal heat sources and away from heater discharge air streams Small rooms can be heated by one unit heater Where two walls are exposed the heater should be mounted as shown in Figure 2 Large rooms require multi unit installations Num ber and capacity of units will be determined by volume of building and square feet of flo...

Страница 5: ... freely Do not mount mercury type thermostat directly on unit vibra tion could cause malfunction Heater may be mounted on a shelf or stand from the bottom Be sure that mounting clearances are maintained and that bottom of unit has at least 1 clearance underneath it This is necessary for good air circulation and servicing of heat exchanger All mounting methods must allow for removal of front cover ...

Страница 6: ... Mounting Cust Supplied 6 Ref 3 1 2 SCH 40 Pipe or 4 O D X 25 Wall Tube Cust Supplied Length to Suit P Adapter Bracket Supplied with 5 8 Bolts Single Point Swivel 4 ø Supplied Pole Support Bracket Heater Mounting Bracket Arm Hardware ø 3 8 Hardware Cust Supplied ø 1 2 x 4 U Bolts Hardware Cust Supplied Ceiling Mount Kit Model HMK 00 4 7 8 4 9 16 Swivel Ceiling Hanger S A Hardware 5 8 ø Hex Nuts Wa...

Страница 7: ...ings must be fitted with plugs that are U L recognized for use in hazardous locations 6 Heaters may be provided with a built in control switch and or thermostat If not they should be controlled by an externally mounted disconnect switch and or separately mounted thermostat as shown in the appropriate wiring diagram on page 6 In case of malfunction the personnel in the area should be aware of locat...

Страница 8: ...e to be located in the haz ardous area they must be approved for use in the class of location Where the consequences of failure may be severe back up controls are essential Refer to Nameplate for Input Voltage 1PH L1 L2 Optional Disconnet Switch GND Optional Aux Cont L1 L2 L3 Contactor X1 H1 H2 X2 Primary Secondary Control Transformer Refer to Nameplate for Primary Input and Secondary Control Volt...

Страница 9: ...e Pole on the Thermostat Remove this Wire when Using Thermostat T3 T2 T1 Optional Alarm Optional Elements Manual Reset High Limit Auto Reset High Limit Motor 1PH R Motor Contactor L2 L1 Red Fan Heat White Diagram II 1 PH Wiring with Fan Switch Transformer Color Code Tabulation PRI VOLT PRI XFMR LEAD CLRS 120V SEC LEAD CLRS 24V SEC LEAD CLRS H1 H2 X1 X2 X1 X2 208 BLK RED BLK WHT YEL BLU 240 BLK ORG...

Страница 10: ...losed Terminals of One Pole on the Thermostat Remove this Wire when Using Thermostat T3 T2 T1 Optional Alarm Optional Elements Manual Reset High Limit Auto Reset High Limit Motor 3PH Terminal Block Diagram III 3 PH Wiring Transformer Color Code Tabulation PRI VOLT PRI XFMR LEAD CLRS 120V SEC LEAD CLRS 24V SEC LEAD CLRS H1 H2 X1 X2 X1 X2 208 BLK RED BLK WHT YEL BLU 240 BLK ORG BLK WHT YEL BLU 380 B...

Страница 11: ...U 380 BLK VIO BLK WHT YEL BLU 415 BLK YEL BLK WHT 415 BLK BRN YEL BLU 480 BLK BLK RED BLK WHT YEL BLU 575 600 BLK GRY BLK WHT YEL BLU Electric Blower Unit Heater for Hazardous Locations Heating Element Rating 03 3 0 kW 18 18 0 kW 05 5 0 kW 20 20 0 kW 07 7 5 kW 25 25 0 kW 10 10 0 kW 30 30 0 kW 15 15 0 kW 35 35 0 kW Heater Voltage 2 240V 6 575V 3 380V 8 208V 4 480V 9 600V 5 415V Phase 1 1 Phase 3 3 ...

Страница 12: ...fac tory supplied replacement blade only 6 Check for any sign of leaking from the heat exchanger Too little fluid will cause the high temperature cutout s to trip or cycle Periodically inspect the heater for leaks by visual examination using a flashlight Look for evidence of fluid dunning down the face of the heat exchanger from the top center Look for evidence of fluid inside the lower terminal e...

Страница 13: ...actory supplied motor See renewal parts section 2 To replace the motor proceed as follows A Disconnect the unit from power supply B Units with motor splice box Remove 4 bolts and cov er of motor splice box See Figure 12 C Units without motor splice box Remove 16 bolts and cover of main control enclosure D Note wire connections for future reference and dis connect all wires leading to the motor All...

Страница 14: ...roperty damage When provided the following components are located in the cast aluminum hazardous location enclosure Remove cover and retaining bolts to gain access the following items See Figure 16 1 CONTROL TRANSFORMER This item is located in the electrical enclosure It may be replaced while in the enclosure To service or replace re move the quick connect wires and mark their locations Remove two...

Страница 15: ...ta Sheet Chromakool PG Transformer Contactor Figure 16 Electric Control Voltage 24V 120V Contactor 072 304551 002 072 304551 008 Transformer 208 240 480 PRI 315 304252 002 315 304252 001 Transformer 575 PRI 315 304252 005 315 304252 003 Aux Contactor 072 304551 102 072 304551 102 Transformer 380 415 PRI 315 304252 006 315 304252 007 Transformer CXH B 315 304252 008 ...

Страница 16: ...16 1 33 35 50 19 15 17 16 31 34 52 51 32 25 30 26 44 27 28 29 75 50 27 15 6 62 10 CO 8 12 9 49 15 Figure 17 ...

Страница 17: ...6 353 304167 001 CXH A 03 83 193 302087 007 353 304167 001 CXH A 03 21 193 302087 006 353 304167 002 CXH A 03 23 193 302087 007 353 304167 002 CXH A 03 43 193 302087 007 353 304167 005 CXH A 03 63 193 302087 008 353 304167 006 CXH A 05 81 193 302087 006 353 304167 008 CXH A 05 83 193 302087 007 353 304167 008 CXH A 05 21 193 302087 006 353 304167 009 CXH A 05 23 193 302087 007 353 304167 009 CXH A...

Страница 18: ...e Chromalox limited warranty applicable to this product at http www chromalox com customer service policies termsofsale aspx 2016 Chromalox Inc All rights reserved Chromalox 103 Gamma Drive Pittsburgh PA 15238 412 967 3800 www chromalox com ...

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