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Model ERCH-HP Energy Recovery Unit
Optional Remote Control Panel
and Wiring Schematics
Indicator Lights powered by the ER Unit
Dirty Filter Indicator (power by others)
Heating/Cooling Switches and Night Setback
Switch/Timer
7-Day Timer or On/Off Switch
G
C
R
7-Day Timer
S1 - Unit On/Off
Terminal Block
in Unit
Control Center
For 7-Day Timer, use blue and black wires.
Red wires should be capped off.
G
C
R
On
Off
BMS
Auto
Terminal Block
in unit
Control Center
Hand/Off/Auto Switch
Hand/Off/Auto Switch allows the unit to
“Off” - off
“On” - Manual Operation
“Auto” - Unit is controlled by BMS, RTU, etc.
NOTE: RTU controllers are by others.
The remote panel is a series of junction boxes ganged
together and includes a stainless steel faceplate. The
remote panel is available with a number of different
alarm lights and switches to control the unit. The remote
panel ships loose and requires mounting and wiring in
the field
The remote panel is available with the following options:
• Unit on/off switch
• Unit on/off light
• 7-day time clock
• Hand/off/auto switch
• Dirty lter light
• Economizer light
• Frost control light
• Wheel rotation sensor light
C
NC
NO
C
NC NO
12
6
7
W1
Y1
Y2
G
R
Unit On/Off
PS2
PS3
Frost Control
Economizer
Rotation Sensor
Dirty Filter
C
NC
C
NO
NC
C
NO
Dirty Filter
Hot
L1
A
W1
12
7
6
Y2
Y1
G
C
R
Unit On/Off
S1
S6
S7
S4
Econ/First Stage Cooling
Second Stage Cooling
S5
Night Setback Timer
Night Setback Switch
Terminal Block
in unit
Control Center