Optional Accessory Wiring Schematics - Greenheck ERCH-20 Installation, Operation And Maintenance Manual

Optional Accessory Wiring Schematics

Remote Panel
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 filter light
• Economizer light
• Frost control light
• Wheel rotation sensor light
7-Day Timer
BLACK BLUE
TIMER
RED
(CAPPED)
On/Off/Auto Switch & Indictor Light Wiring
TERMINAL BLOCKS IN
UNIT CONTROL CENTER
R
C
ON
OFF G
AUTO *
Y1
Y2
* -- BMS, TIMECLOCK,
TSTAT, RTU, ETC.
W1
6
7
12
NC C
SUPPLY DIRTY
FILTER SWITCH
EXHAUST DIRTY
FILTER SWITCH
NC C
ON/OFF/AUTO SWITCH ALLOWS THREE MODES OF OPERATION
"ON" - UNIT IS TURNED ON MANUALLY
"OFF" - UNIT IS TURNED OFF MANUALLY
"AUTO" - UNIT IS CONTROLLED VIA SCHEDULER OF BMS, TIMECLOCK, TSAT, ETC.
18 General Description - NOT model specific Energy Recovery Ventilator with Heating and Cooling
TERMINAL BLOCKS IN
UNIT CONTROL CENTER
R
C
G
Y1
Y2
W1
6
7
12
UNIT ON/OFF
FROST CONTROL
ECONOMIZER
WHEEL ROTATION
NO
DIRTY FILTER
NO
Unit Interfacing Terminals
Heating/Cooling Switches and Night Setback Switch/
Timer
UNIT ON/OFF
S1
COOL STAGE 1 / ECONOMIZER
S6
COOL STAGE 2
S7
HEAT
S4
UNOCCUPIED RECIRCULATION
S5
Dirty Filter Indicator
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HOT
C
SUPPLY DIRTY NC
FILTER SWITCH
EXHAUST DIRTY
FILTER SWITCH
NC C
TERMINAL BLOCKS IN
UNIT CONTROL CENTER
R
C
G
Y1
Y2
W1
6
7
12
COMMON
NO
DIRTY FILTER
NO
®