Chromalox CAF-20645, CAF-20215 Wiring, Maintenance, Maximum Watts Per Circuit Using 75C. Wire

INSTALLATION (Recessed Wall)

1.Unpack the heater from the carton and remove the front panel. Note: The front panel screws are recessed at the bottom of the front panel at each end of the heater.

2.Remove the desired terminal box covers and wire supply knockouts from the terminal box area.

3.Use trim frame as a template to drill holes into the top, bottom and sides of the heater using a 1/8” diameter drill bit.

4.Secure the trim frame using the #8 screws provided with the trim kit.

TIP: The bottom trim may be omitted if the heater is to be installed at floor level.

5.Prepare the wall recess opening to accept the heater.

TIP: Leave approximately 1/2” clearance to insert the heater cabinet.

6.Secure the back plate into the recess opening using suitable fasteners (Provided by customer).

7.Proceed to the wiring instructions.

WIRING

Note: All wiring should be done in accordance with local codes and the National Electrical Code by a qualified person.

1.Run branch circuit wiring of proper voltage and wire size to the location of the terminal box of the heater.

TIP: Supply wire entry is commonly made into one heater. Through wiring (factory furnished) can be used for connection to adjacent heaters.

Recommended minimum supply wire sizes are listed in the table below:

Maximum Watts Per Circuit Using 75°C. Wire

	Rough In
	Wire Size	120V	208V	240V	277V	347V 480V 600V
	14	1440	2496	2880	3324	4164	5760	7200
Copper	12	1920	3328	3840	4432	5552	7680	9600
Wire	10	2880	4992	5760	6648	8328	11520	14400

2.Wire all heaters and controls in accordance with the appropri- ate wiring diagram.

TIP: Sample wiring diagrams are provided on page 4.

3.Wrap the supply ground wire to the green painted ground screw and tighten.

Note: When heaters are mounted end to end, remove the fin- ishing end plate, install a chase nipple and locknut in the ter- minal box to insure grounding continuity, and to protect the wiring. (Figure 4)

Chase Nipples

Installation Between

Heaters Butted Together

Ground Wire Running	Figure 4
Through Chase Nipple

Terminal Box Volumes (Cubic Inches)

Heater Style	Left Hand Box	Right Hand Box
	4” Wide	5” Wide
CAF-20	379.75	474.75

4.Do a final and complete check of all wiring then replace the terminal box covers.

5.The front panel may now be installed.

WARNING: To prevent the risk of fire, do not oper- ate the heater without the front cover in place.

Insert the top of the front panel into the top flange of the heater. Push the bottom flange of the front panel into place and secure with screws.

Figure 5

Maintenance

The CAF-20 series heaters contain no moving parts. Occasional vacuum cleaning of the cabinet interior is the only maintenance required.

WARNING: Before removing the front cover for cleaning, make certain supply power is discon- nected.

Where heaters are spaced apart, remove the finishing plate and use rigid conduit (provided by customer) for through wiring and ground continuity. Do not exceed the allowable number of con- ductors allowed by the National Electrical Code.