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Model ERV Energy Recovery Unit
Access Panel Description and Location
ERV-251, ERV-361, ERV-521, ERV-581 ERV-522
Interior
Outdoor Air
Inlet
Exhaust Air
Discharge
Rooftop
Exhaust
Hood
Intake
Hood
Exhaust Air
Inlet
Outdoor Air
Discharge
Arrangement A
1
2
3
4
Interior
Outdoor Air
Inlet
Exhaust Air
Discharge
Rooftop
Exhaust
Hood
Intake
Hood
Exhaust Air
Inlet
Outdoor Air
Discharge
Arrangement B, C or D
1
2
3
4
Interior
Rooftop
Exhaust Air
Inlet
Outdoor Air Inlet
Exhaust Air Discharge
Exhaust Hood
Intake Hood
Outdoor Air
Discharge
Arrangement B, C or D
1
2
3
3
4
5
6
Interior
Rooftop
Exhaust Air
Inlet
Outdoor Air Inlet
Exhaust Air Discharge
Exhaust Hood
Intake Hood
Outdoor Air
Discharge
Arrangement A
1
2
3
4
5
6
3
1
Outdoor air blower and motor
Energy wheel cassette
2
Energy wheel cassette
Internal filters
Outdoor air intake damper
Frost control
Outdoor air sensors
3
Main disconnect
Electrical control center
Internal filters
4
Exhaust air blower and motor
1
Exhaust blower and motor
2
Electric control center
Main Disconnect
3
Energy wheel cassette
Internal filters
Frost control
Outdoor air sensors
4
Preheater controls
Outdoor air intake damper
5
Supply blower and motor
6
Exhaust air intake damper