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Typical Control Center Components
1. Main Disconnect
2. Motor Starter - Exhaust Air Fan #1
3. Motor Starter - Exhaust Air Fan #2
4. Motor Starter - Outdoor Air Fan
5. Energy Wheels Motor Contactor
6. Control Power Transformer (24 VAC Secondary)
7. 24 VAC Terminal strip
8. Fuses for the control circuit, wheel drive transformer,
and blower motors.
8
2
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
• On/off/auto switch
• Dirty filter light
• Economizer light
• Frost control light
• Wheel rotation sensor light
7 DAY TIMER WIRING
7-Day Timer
BLACK
BLUE
TIMER
RED
(CAPPED)
®
1
6
7
5
3
4
TERMINAL BLOCKS IN
UNIT CONTROL CENTER
R
C
G
Y1
Y2
W1
6
7
12
On/Off/Auto Switch & Indictor Light Wiring
ON/OFF/AUTO SWITCH & INDICATOR LIGHT WIRING
TERMINAL BLOCKS IN
UNIT CONTROL CENTER
ON
OFF
*
AUTO
* -- BMS, TIMECLOCK,
TSTAT, RTU, ETC.
NC
SUPPLY DIRTY
FILTER SWITCH
EXHAUST DIRTY
FILTER SWITCH
NC
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.
Unit Interfacing Terminals
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
POWERED BY OTHERS
Dirty Filter Indicator
(Powered by others)
HOT
NC
SUPPLY DIRTY
FILTER SWITCH
EXHAUST DIRTY
FILTER SWITCH
NC
Model APEX Energy Recovery Ventilator
R
C
UNIT ON/OFF
G
Y1
Y2
W1
6
FROST CONTROL
ECONOMIZER
7
12
WHEEL ROTATION
C
NO
DIRTY FILTER
C
NO
TERMINAL BLOCKS IN
UNIT CONTROL CENTER
R
C
G
Y1
Y2
W1
6
7
12
COMMON
C
NO
DIRTY FILTER
C
NO
9
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