02/04
4034-102 Rev F
31
HRV200PLUS INSTALLATION INSTRUCTIONS
9
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See Figures 18-19 for wiring diagram.
4. Thermostat Operating Modes Connector P6
a. OFF Mode
The HRV is idle until an input is sensed. This is the normal standby state when the HRV Plus is powered but not receiving any
command inputs.
b. Thermostat ON Mode
When 24VAC is sensed across the thermostat input terminals (TSTAT & TCOM), the HRV control executes Fireplace High
Fire Mode, as described above. When the 24VAC signal is removed from the Thermostat input terminals, the HRV returns to
its previous state.
3. Fireplace Control Terminals
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