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9. Remove the nut, lock washer and flat
washer from heater terminal posts marked
L1, L2 and L3.
10. Connect wiring from control box panel to
the correct terminal post as shown on
heaterʼs wiring diagram.
Note: The correct sequence for replacing the
hardware on the heater terminal posts is: 1)
wire connector 2) flat washer 3) locking washer
4) nut. "DO NOT OVER TIGHTEN NUT ON
TERMINALS" use a nut driver only to tighten
connection.(See Figure 6.)
Control Wiring
11. Connect control wires(Brown) on terminal
block (and P.C.B) as shown on wiring
diagram attached on compressor access
panel.
Power Wiring
12. Then route wires down through the
opening in the top of control box. Connect
wires to high voltage terminal block. Refer
to wiring diagram supplied with heater.
13. Check to make certain the proper size
fuses are installed per the fuse table for
the exact heater being used.
14. Ground unit at the grounding lug
provided. Make sure all field wiring
complies with all applicable codes and
water tightness.(Figure 7)
15. Remove compressor panel, then remove
unitʼs control box cover. Connect high
voltage leads to bottom of compressor
contactor or terminal block.(See unitʼs
wiring diagram.) Replace control box
cover and access panel onto unit.
(Figure 7)
CAUTION: Do not over tighten the nuts on the
heater terminals. if the nuts are over tightened
the ceramic insulators will break and heaters
must be replaced.
Maximum torque on nuts is 11 inch
pounds.
CAUTION: Use copper conductors only to
prevent equipment damage. Unit terminals
are not designed to accept any other wiring.
16. Replace control box cover using four(4)
screws.
17. Replace heater access panel.
Terminal Block
To Unit Control Box.
4
L 2
L 3
Figure 6
Ground
Power Supply
Figure 7
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