Tjernlund HST_HS115_HSUL-JC, 1C, 2C Canadian Series (Discontinued) 8504017 Rev 1 09/97 User Manual
Page 12
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NOTE: This wiring diagram may not be compatible with certain set-back thermostats. If the Power Venter runs without a call for
heat, (after initial post-purge time delay from 1 -10 minutes), an isolation relay will have to be added to isolate the 4 & 5 coil
inputs on Relay/Timer. See diagram on Page 12 for wiring with isolation relay.
HST SERIES CONNECTED WITH THERMOSTAT ON SINGLE ZONE 24V GAS EQUIPMENT
HSUL SERIES CONNECTED WITH THERMOSTAT ON SINGLE ZONE 24V GAS EQUIPMENT
NOTE:
Power Venter may operate independently of
burner circuit when power is initially supplied to
L1 and L2 connections of the Relay/Timer. If the
Power Venter continues to operate for more than
10 minutes without a call for heat, verify that
wiring is in accordance with proper diagram.