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ERS UNIT SCHEMATIC DIAGRAM
Notes:
1.
Remove jumper to install field optional low ambient switch.
2.
Step-down transformer assembly for 460 volt units.
3.
Selective voltage terminal for proper unit voltage
4.
Optional low ambient switch.
5.
Optional motorized intake damper.
6.
Optional stop, start and jog control.
7.
Matching adapter harness (provided) to connect with rooftop unit. For energy
management systems connect +24v to green and common 24v to black.
PAGE 11
COMPONENT CODE
Fixed Relay Board
A131
Motor, Exhaust Air
B26
Motor, Fresh Air
B27
Motor, Desiccant Wheel
B28
Motor, Damper (Optional)
B30
Capacitor, Wheel Motor
C23
Delay, Cycle Timer (Optional)
DL43
Fuse
F29
Jack, Cycle Control (Optional)
J33
Jack, Cycle Control Harness (Optional)
J34
Jack, Cycle (Optional)
J40
Jack, Control Box (Fresh Air)
J48
Jack, Control Box (Wheel)
J50
J51
Jack, Control Box (Exhaust Air)
J56
Jack, Control Box (Damper)
J148
Jack, Fresh Air Motor Harness
J150
Jack, Wheel Motor Harness
J151
Jack, Exhaust Air Motor Harness
J152
Jack, Transformer (High Voltage)
J153
Jack, Field Harness
J160
Jack, Damper Motor Harness
K94
Relay, On/Off (Optional)
K163
Contactor, Exhaust Air Motor
K164
Contactor, Fresh Air Motor
P33
Plug, Cycle Control (Optional)
P34
Plug, Cycle Control Harness (Optional)
P40
Plug, Wheel Cycle (Optional)
P48
Plug, Fresh Air Motor Harness
P50
Plug, Wheel Motor Harness
P51
Plug, Exhaust Air Motor Harness
P56
Plug, Damper Motor Harness
P148
Plug, Fresh Air Motor
P150
Plug, Wheel Motor
P151
Plug, Exhaust Air Motor
P152
Plug, Transformer (High Voltage)
P153
Plug, Field Harness
P160
Plug, Damper Motor
S23
Thermostat - Low Ambient (Optional)
S26
Switch, Low Ambient (Optional)
S51
Switch, Door
S125
Switch, Ambient Override (Optional)
T27
Transformer, Control
T28
Transformer, Step-down (Optional)
WIRE COLOR
BK
Black
BL
Blue
GR
Green
GY
Gray
OR
Orange
PK
Pink
RD
Red
WH
White
YL
Yellow
R62-18YDW
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