1
2
3
4
6
5
7
8
Sequence for wiring ERV unit:
1. The unit’s nameplate states the voltage and total amperage required. The wire
supplying power to the unit should be sized for the label’s voltage and amperage.
2. The main power line should be connected to the disconnect switch. Make sure that the
disconnect lugs are securely tightened. A door interlocking safety disconnect is provided
as a standard feature with model ERV, (see Figure 4, page 6).
Power may be routed to the control center through the curb or the knock-outs on the side
of the ERV. The locations for the knockouts and control center are provided on the ERV
submittal. If power will be routed through the curb and unit base panels, then run the
power supply up through the base panel near the exhaust intake opening of the ERV.
3. Connect control wiring to the terminal strip located in the electrical control center. All
ERV units include, as standard, a transformer to achieve the 24 VAC control voltage.
4. Refer to the wiring diagram located in the control center or included with this manual for
controlling the ERV.
CAUTION
Any wiring deviations may result in personal injury or property damage. Greenheck is not
responsible for any damage to, or failure of the ERV unit caused by incorrect field wiring.
7
INSTALLATION (continued)
1. Main Disconnect
2. Motor Starter -Exhaust Air Fan
3. Motor Starter-Outdoor Air Fan
4. Motor Contactor-Energy Wheel
5. Control Power Transformer
(460 to 24 VAC)
6. Energy Wheel Motor Transformer
(460 to 230 VAC)
7. 24 VAC Terminal strip
8. Internal fuses for the control
circuit and wheel drive transformer
ELECTRICAL CONNECTIONS
TYPICAL CONTROL CENTER COMPONENTS
