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Agency
CPHEATER
kW
Approval
125
UL
5
126
UL
5
127
UL
7.5
128
UL
7.5
129
UL
10
130
UL
10
131
UL
15
132
UL
20
Air Conditioner
Unit Size
24
30
36
42
48
60
X= Not Approved Combination
Heat Pump
Unit Size
24
30
36
42
48
60
X= Not Approved Combination
7. Open heater package and remove heater module; secure
heater module to standoffs on blower inlet with (3) bolts
provided (see Fig. 3). Adjust mounting position so that all
hardware and sheetmetal clears the heating element wire by
at least 1/4 in. Reinstall heater/blower assembly.
8. Reinstall rear motor support bracket and attached motor
wiring. Reinsert motor power plug and speed tap plug into
motor. The connectors are polarized to prevent mis- -wiring.
9. Remove heater wiring cover plate from interior partition
between blower and control box (See Fig. 4) and install
heater wiring plug attachment plate provided with heater.
10. Remove unit front panel to access unit control box
compartment.
11. Open heater package and remove heater control panel; set
heater control panel on top of unit (See Fig. 5).
12. Heater control panel will have black and yellow power
wires ending in panel mounted plugs; reach through large
rectangular opening in control panel and snap these plugs
into mating openings in heater wiring plug attachment plate
installed in step 9 above (See Fig. 4).
13. Rotate heater control panel into unit control box area and
locate it into top left corner of control box; secure heater
control panel to unit control box with (4) screws provided
(See Fig. 6).
14. Open flexible "fishpaper" insulation cover provided with
unit control box and route heater low voltage wires along
the bottom of the unit control box. Route low voltage leads
from heater relay(s) through hole in unit control box and
into low voltage splice box. (See Fig. 6 and Fig. 7.) dress
wires and secure them to existing unit control wires with
wire ties provided .
Table 1 – Electric Heater Usage Chart
Circuit
Air Conditioner Models (PAC)
V
PH
Breaker
24
208/240
1
N
208/240
1
Y
208/240
1
N
208/240
1
Y
208/240
1
N
208/240
1
Y
208/240
1
Y
208/240
1
Y
Table 2 – Minimum Airflow for Heater Operation
5 kW
7.5 kW
600
750
600
750
600
750
600
750
600
750
600
750
5 kW
7.5 kW
750
800
750
800
750
800
750
800
750
800
750
800
30
36
42
48
60
Minimum Airflow (CFM)
10 kW
750
750
750
750
750
750
Minimum Airflow (CFM)
10 kW
800
800
800
800
800
800
15. Re- -close flexible "fishpaper" insulation cover; insure unit
black and yellow power
properly routed through insulation cover (See Fig. 8).
16. Attach the adhesive backed wiring label provided with the
heater to the back of the access panel near the unit wiring
label (See Fig. 1).
17. Return to blower compartment and locate black and yellow
power wires from heater module; these wires will terminate
in plug connectors that mate with the plug from the heater
control installed in Step 13 above. Snap these connectors
into place; dress and secure wires to fan wires with wire ties
provided (See Fig. 9).
18. The factory speed tap for electric heat operation is tap 2.
Refer to blower performance table in the unit installation
instructions or pre- -sale literature to determine available
airflow at duct system external static pressure. Compare the
actual airflow with the minimum required airflow from
Table 2. If tap 2 airflow is lower than minimum required
airflow, recheck blower performance table to see if
minimum airflow can be achieved on tap 3. If tap 3 airflow
meets the minimum CFM requirement, change speed tap for
electric heat from tap 2 to tap 3 in unit control box. See unit
instructions and wiring diagram. If tap 3 airflow does not
achieve minimum CFM requirement, then another electric
heater that meets the minimum CFM requirement must be
used.
19. Reattach the blower access panel.
2
Heat Pump Models (PHP)
24
30
36
42
48
15 kW
20 kW
X
X
X
X
1050
X
1050
X
1050
1400
1050
1400
15 kW
20 kW
X
X
X
X
1200
X
1200
X
1200
1700
1200
1700
"pigtails" from contactor are
60
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