Carrier 62E User Manual

Page 26

FALSE

TRUE

FALSE

TRUE

ERV Wheel Off
Supply Blower Off
Exhaust Blower Off
2-Pos Motor Closed

Wheel Maintenance Indicator Off
Supply Blower Maintenance Indicator Off
Exhaust Blower Maintenance Indicator Off

ERV Wheel On
Supply Blower Off
Exhaust Blower On
2-Pos Motor Open

Wheel Maintenance Indicator On
Supply Blower Maintenance Indicator Off
Exhaust Blower Maintenance Indicator On

ERV Wheel Modulating
Supply Blower On
Exhaust Blower On
2-Pos Motor Open

Wheel Maintenance Indicator On
Supply Blower Maintenance Indicator On
Exhaust Blower Maintenance Indicator On

ERV Wheel Stop/Jog
Supply Blower Off
Exhaust Blower On
2-Pos Motor Open

Wheel Maintenance Indicator On
Supply Blower Maintenance Indicator Off
Exhaust Blower Maintenance Indicator On

ERV Wheel Stop/Jog
Supply Blower On
Exhaust Blower On
2-Pos Motor Open

Wheel Maintenance Indicator On
Supply Blower Maintenance Indicator On
Exhaust Blower Maintenance Indicator On

ERV Wheel On
Supply Blower On
Exhaust Blower On
2-Pos Motor Open

Wheel Maintenance Indicator On
Supply Blower Maintenance Indicator On
Exhaust Blower Maintenance Indicator On

Preheat available if
pressure or temperature
are correct for usage

Low Temp
Lock Out

Option 51
Lockout
Activated

HVAC Supply Fan On
or ERV Timer Option Active
or Stand Alone Short
Pins 31 to 30 and 29 to 28

CO2 Level
Not High
Enough in
Space

Economizer
Full Open
End Switch

Frost Option
Wheel Iced

Frost Option
Wheel Iced
VFD

ERV Power
Exhaust
Mode

Free Cooling
Dry Bulb Enthalpy
Option and W1
and G are Off

Fig. 24 — ERV Sequence of Operation

a62-540