Greenheck HRE-20 Installation, operationand Maintenance Manual page 26
Heat recovery unit with evaporative cooling
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OPTIONAL ACCESSORIES
Remote Panel Wiring Schematics
Indicator Lights
powered by the ER Unit
Dirty Filter Indicator
(Power by Others)
Refer to Pressure Switch for voltage and load ratings .
26
Hot
L1
R
C
G
Y1
Y2
W1
6
7
12
PS2
NC
C
NO
PS3
C
NC
NO
PS2
NC
C
NO
PS3
NC
C
NO
Unit On/Off
Frost Control
Economizer
Rotation Sensor
Supply Dirty Filter
Exhaust Dirty Filter
Supply Dirty Filter
Exhaust Dirty Filter
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Troubleshooting
