3
INSTALLATION
Power and Control Wiring
1. Unpack the contents of the crate. Use Table 3 to confirm that
the kit contains all of its parts.
2. The power exhaust motor is factory wired to the high speed
tap (terminal 1). To change the motor speed move the black
wire to the desired speed tap on the motor per Table 4.
NOTE: When using the power exhaust in a horizontal appli
-
cation, some wiring may have to be field lengthened.
3. Remove the control box access panel.
4. Install the Power Exhaust Relay (PER) in the control box, at
the position shown in Fig. 1 for vane axial units and Fig. 2 for
belt drive fan units, using two 8-18 in. x 1/2 in. pan head
screws (AL56AU166).
NOTE: The power exhaust motor closest to the control box is PEM1.
The motor furthest from the control box is PEM2.
Fig. 1 — Power Exhaust Relay Installation
(Vane Axial Fan Units)
Fig. 2 — Power Exhaust Relay Installation
(Belt Drive Fan Units)
5. Install wiring harness (50HEMRAX-A00) in the control box
as shown in Fig. 3. Refer to Fig. 4 for point to point connec
-
tions. Wiring harness label near terminals should match con
-
nection point in control box.
6. Connect violet wire in unit wiring harness from PL6-11 to the
Power Exhaust Relay (PER) coil terminal 1.
7. Bundle the power exhaust wiring harness to existing control
box wiring harness with 6 of the supplied wire ties.
p
Fig. 3 — Power Exhaust Wiring Installation
Table 4 — Motor Speed Tap Configuration
MOTOR TERMINAL NUMBER
POWER
EXHAUST
MOTOR
1
2
3
PEM1
High
Medium
Low
PEM2
High
Medium
Low
LEGEND
PEM
— Power Exhaust Motor
Power
Terminal
Block
Unit
Control
Board
Power Exhaust Relay
Mounting Location
Power Exhaust Relay
Mounting Location
Power
Terminal
Block
Central
Terminal
Board
Harness
Assembly
PER
OFC
PL9
PL6
