Tjernlund HST_HS115_HSUL-J, 1, 2 Series (Discontinued) 8504060 Rev A 11/99 - Manual (Page 12)

11
HST SERIES CONNECTED WITH 24V THERMOSTAT ON SINGLE ZONE GAS OR OIL EQUIPMENT
HSUL SERIES CONNECTED WITH 24V THERMOSTAT ON SINGLE ZONE GAS EQUIPMENT
NOTE:
Power Venter may operate
independently of burner circuit
when power is initially sup-
plied to L1 and L2 connec -
tions of the Relay/Timer. If the
Power Venter continues to
operate for more than 10 min-
utes without a call for heat,
verify that wiring is in accor-
dance with proper diagram.
HST SERIES CONNECTED WITH SET BACK THERMOSTAT AND ISOLATION RELAY
(NECESSARY IF HST CYCLES ERRATICALLY)
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 below for wiring with isolation relay.
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.