Tjernlund GPAK-1TR 8504047 Rev B 06/14 - Manual (Page 9)

6. The electrical contact ratings for the Fan Proving Switch are as follows:
3 AMPS (full load) at 120VAC
28VA Pilot Duty (1.16 Amps) at 24VAC
125VA Pilot Duty at 120VAC
The Fan Proving Switch is not suitable for loads which exceed the above limitations.
7. All 24V wiring must be at least 18 AWG. All 115V wiring must be at least 14 AWG.
8. All wiring must be in compliance with local codes or in their absence, with the 1987 (or latest) Edition of the National Electric Code
(NFPA #70).
9. Disconnect 115V power before attempting to wire the Power Venter to the appliance. Power may be disconnected by means of
the appliance circuit breaker/fuse.
*GPAK-1TR* SEQUENCE OF OPERATION:
Adjust the furnace thermostat to call for heat. At this point, the Power Venter should start. After a delay, the furnace burner should
begin a trial for ignition. When the fan proving switch closes, the furnace combustion relay is energized. Normal combustion
sequence for the furnace begins: Induced draft furnace blower starts, its proving switch makes, energizing ignition control and/or gas
valve.
DO NOT OPERATE THE FURNACE WITHOUT THE FAN PROVING SWITCH WIRED INTO THE 24V FURNACE CIRCUIT!
If you are unable to wire the *GPAK-1TR* as outlined in these instructions, call Tjernlund’s Customer Service Department toll free at
1-800-255-4208 for fast assistance.
WIRING *GPAK-1TR*
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