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26
LEGEND
DCV — Demand Controlled Ventilation
IAQ — Indoor Air Quality
LALS— Low Temperature Compressor
LockoutSwitch
OAT — Outdoor-Air Temperature
POT — Potentiometer
Potentiometer Default Settings:
Power Exhaust Middle
Minimum Pos. Fully Closed
DCV Max. Middle
DCV Set Middle
Enthalpy C Setting
NOTES:
1. 620 ohm, 1 watt 5% resistor should be removed only when using differential
enthalpy ordry bulb.
2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power
supply, it cannot have the secondary of the transformer grounded.
3. For field-installed remote minimum position POT, remove black wire jumper
between P and P1 and set control minimum position POT to the minimum
position.
Fig. 36 — EconoMi$erIV Wiring
4
3
5
2
8
6
7
1
10
11
9
12
PINK
BLACK
BLUE
NOTE 1
NOTE 2
RUN
500 OHM
RESISTOR
50HJ540573
ACTUATOR
ASSEMBLY
RED
WHITE
ECONOMISER2 PLUG
DIRECT DRIVE
ACTUATOR
OAT
LEGEND
OAT — Outdoor Air Temperature Sensor
NOTES:
1. Switch on actuator mustbe in run position foreconomizerto operate.
2. 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor.
Fig. 37 — EconoMi$er2 Wiring