Chromalox Electric Heater CAF 20215 User Manual

Installation, Operation  
4
AC  
and  
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p
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e
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r
s
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4
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PF494-1  
MAINTENANCE  
161-506173-001  
JULY, 2002  
CAF-20 Series Architectural Cabinet  
Convection Heater  
TABLE 1 Specifications  
Model  
Volts  
Phase  
Watts  
Amps  
BTUH  
Length  
Weight (Lbs.)  
CAF-20215  
CAF-20215  
CAF-20215  
CAF-20215  
CAF-20215  
CAF-20215  
CAF-20215  
CAF-20220  
CAF-20220  
CAF-20220  
CAF-20220  
CAF-20220  
CAF-20220  
CAF-20220  
CAF-20330  
CAF-20330  
CAF-20330  
CAF-20330  
CAF-20330  
CAF-20330  
CAF-20330  
CAF-20430  
CAF-20430  
CAF-20430  
CAF-20430  
CAF-20430  
CAF-20430  
CAF-20430  
CAF-20440  
CAF-20440  
CAF-20440  
CAF-20440  
CAF-20440  
CAF-20440  
CAF-20440  
CAF-20645  
CAF-20645  
CAF-20645  
CAF-20645  
CAF-20645  
CAF-20645  
CAF-20645  
CAF-20550  
CAF-20550  
CAF-20550  
CAF-20550  
CAF-20550  
CAF-20550  
CAF-20550  
CAF-20660  
CAF-20660  
CAF-20660  
CAF-20660  
CAF-20660  
CAF-20660  
CAF-20660  
208  
208  
240  
240  
277  
480  
480  
208  
208  
240  
240  
277  
480  
480  
208  
208  
240  
240  
277  
480  
480  
208  
208  
240  
240  
277  
480  
480  
208  
208  
240  
240  
277  
480  
480  
208  
208  
240  
240  
277  
480  
480  
208  
208  
240  
240  
277  
480  
480  
208  
208  
240  
240  
277  
480  
480  
1
3
1
3
1
1
3
1
3
1
3
1
1
3
1
3
1
3
1
1
3
1
3
1
3
1
1
3
1
3
1
3
1
1
3
1
3
1
3
1
1
3
1
3
1
3
1
1
3
1
3
1
3
1
1
3
1,500  
1,500  
1,500  
1,500  
1,500  
1,500  
1,500  
2,000  
2,000  
2,000  
2,000  
2,000  
2,000  
2,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
3,000  
4,000  
4,000  
4,000  
4,000  
4,000  
4,000  
4,000  
4,500  
4,500  
4,500  
4,500  
4,500  
4,500  
4,500  
5,000  
5,000  
5,000  
5,000  
5,000  
5,000  
5,000  
6,000  
6,000  
6,000  
6,000  
6,000  
6,000  
6,000  
7.2  
4.2  
6.3  
3.6  
5.4  
3.1  
1.8  
9.6  
5.6  
8.3  
4.8  
7.2  
4.2  
2.4  
14.4  
8.3  
12.5  
7.2  
10.8  
6.3  
5,118  
5,118  
5,118  
5,118  
5,118  
5,118  
5,118  
6,824  
6,824  
6,824  
6,824  
6,824  
6,824  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
24.3  
36.3  
36.3  
36.3  
36.3  
36.3  
36.3  
36.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
48.3  
72.3  
72.3  
72.3  
72.3  
72.3  
72.3  
72.3  
60.3  
60.3  
60.3  
60.3  
60.3  
60.3  
60.3  
72.3  
72.3  
72.3  
72.3  
72.3  
72.3  
72.3  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
Length  
6,824  
32  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
10,236  
13,648  
13,648  
13,648  
13,648  
13,648  
13,648  
13,648  
15,354  
15,354  
15,354  
15,354  
15,354  
15,354  
15,354  
17,060  
17,060  
17,060  
17,060  
17,060  
17,060  
17,060  
20,472  
20,472  
20,472  
20,472  
20,472  
20,472  
20,472  
43.5  
43.5  
43.5  
43.5  
43.5  
43.5  
43.5  
53  
53  
53  
53  
53  
53  
53  
53  
53  
53  
53  
53  
53  
53  
74  
74  
74  
74  
74  
74  
74  
63.5  
63.5  
63.5  
63.5  
63.5  
63.5  
63.5  
74  
74  
74  
74  
74  
Side View  
20  
(Less End Cap)  
1
1-1/2  
2
Back View  
1
3.6  
14.4  
8.3  
12.5  
7.2  
10.8  
6.3  
5-3/4  
Terminal Box  
2-3/4  
Terminal Box  
3.6  
Bottom View  
(Front Inlet Version Shown)  
Figure 1  
19.2  
11.1  
16.7  
9.6  
14.4  
8.3  
4.8  
21.6  
12.5  
18.8  
10.8  
16.2  
9.4  
5.4  
24  
13.9  
20.8  
12  
18.1  
10.4  
6
28.8  
16.7  
25  
14.5  
21.7  
12.5  
7.2  
74  
74  
© 2010 Chromalox, Inc.  
 
INSTALLATION (Recessed Wall)  
1. Unpack the heater from the carton and remove the front panel.  
TIP: The bottom trim may be omitted if the heater is to be  
Note: The front panel screws are recessed at the bottom of the  
front panel at each end of the heater.  
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.  
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.  
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.  
Terminal Box Volumes (Cubic Inches)  
Heater Style  
Left Hand Box  
4” Wide  
Right Hand Box  
5” Wide  
1. Run branch circuit wiring of proper voltage and wire size to the  
location of the terminal box of the heater.  
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.  
TIP: Supply wire entry is commonly made into one heater.  
Through wiring (factory furnished) can be used for connection  
to adjacent heaters.  
WARNING: To prevent the risk of fire, do not oper-  
ate the heater without the front cover in place.  
Recommended minimum supply wire sizes are listed in the table  
below:  
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.  
Maximum Watts Per Circuit Using 75°C. Wire  
Rough In  
Wire Size  
120V  
208V  
240V 277V  
347V 480V  
600V  
14  
12  
10  
1440  
1920  
2880  
2496  
3328  
4992  
2880 3324  
3840 4432  
5760 6648  
4164 5760  
5552 7680  
7200  
9600  
Copper  
Wire  
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)  
Figure 5  
Chase Nipples  
Installation Between  
Heaters Butted Together  
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.  
Ground Wire Running  
Through Chase Nipple  
Figure 4  
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.  
 
WIRING DIAGRAMS  
Heater LYD Relay – 1-Ph Parallel  
Element  
Heater No Controls – 1-Ph Parallel  
Element  
Unit  
Control  
T2  
T1  
Unit  
Control  
L1  
L1  
L2  
2
Return Wire  
L2  
Return Wire  
L1  
L2  
Heater No Controls – 3-Ph Delta  
Heater LVC Relay – 1-Ph Parallel  
Element  
Element  
L1  
L2  
L1  
Unit  
Control  
Unit  
Control  
T0  
T1  
L2  
2
Return Wire  
L1  
L2  
Return Wires  
L3  
L3  
Heater 3 Pole Contactor – 3-Ph Delta  
Element  
T0  
T1  
Heater 2 Pole Stat – 1-Ph Parallel  
Unit  
Element  
Unit  
Control  
Control  
24V  
L1  
L2  
Stat  
L1  
L1  
L2  
L3  
L2  
Return Wire  
Return Wires  
Contactor  
Heater 3 Pole Stat – 3-Ph Parallel  
Heater 3 Pole Contactor/TX – 3-Ph Delta  
Element  
T0  
T1  
Element  
Unit  
Unit  
Control  
Control  
24V  
Stat  
L1  
L2  
L3  
L1  
L2  
L3  
Return Wires  
Return Wires  
L1 L2 L3  
Contactor  
Limited Warranty:  
Please refer to the Chromalox limited warranty applicable to this product at  
2150 N. RULON WHITE BLVD., OGDEN, UT 84404  
Phone: 1-800-368-2493  
 

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