Tjernlund HST_HS115_HSUL-JC, 1C, 2C Canadian Series (Discontinued) 8504017 Rev 1 09/97 - Manual (Page 13)

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HST SERIES CONNECTED WITH SET BACK THERMOSTAT AND ISOLATION RELAY
(NECESSARY IF HST CYCLES ERRATICALLY)
HS115 SERIES CONNECTED TO ANY 115V BURNER MOTOR OR GAS VALVE
(BURNER MOTOR OR GAS VALVE LESS THAN 3 AMPS @ 120 VAC)
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.