Tjernlund 950-1067 Relay-Timer Airotronics - Adjustable 8504053 Rev. A 04/12 User Manual
Page 3
If you are replacing the Timer/Relay of a VP-2/VP-3 or WHK2 connect the
control input voltage as shown in Diagram B.
4
5
2
3
1
YELLOW
BLUE
CONTROL INPUT
DIAGRAM B
CONTROL INPUT
BLUE
ORANGE
1
3
2
5
4
If you are replacing the Timer/Relay of an HST manufactured before August
1st 1992, or any GPAK-JT/GPAK-1T/GPAK-1TR connect the control input
voltage as shown in Diagram C. NOTE: Terminal 4 of the Timer/Relay is Blue
in the GPAK-T Series and Orange in the HST-Series. Terminal 5 of the
Timer/Relay is White/Brown in the HST-Series and Orange in the GPAK-T
Series.
DIAGRAM C
CONTROL INPUT
ORANGE
WHT / BRN
1
3
2
5
4
If you are replacing the Timer/Relay of an HST manufactured after August
1st 1992, or any HST120, connect the control input voltage as shown in
Diagram D.
DIAGRAM D
1
3
2
5
4
CONTROL INPUT
FROM APPLIANCE
If you are adding the Timer/Relay to an existing Draft Inducer/Power Venter,
connect the 24 or 120 VAC control input voltage as shown in diagram E.
NOTE: The UC1 Universal Interlock Control is the preferred accessory for
interlocking and controlling Draft Inducers & Power Venters.
DIAGRAM E
CONTROL INPUT WIRING
IMPORTANT: Run heating equipment through a few cycles to verify post-purge is adequate. Venter should shut off (10 seconds to
10 minutes) after call for heat is removed and post-purge cycle is complete. Oil fired equipment requires a post-purge long enough to
eliminate post cycle nozzle drip odor. A longer post-purge may be necessary for longer vent runs or high heat retention, refractory
lined combustion chambers. A shorter post-purge may be desired for gas installations.