Tjernlund WHK-2 Millivolt Interlock Kit (Discontinued - Not Compatible with UC1) 8504026 Rev 8 09/98 - Manual (Page 7)

5. Connect the WHITE lead from the WHK-2 to the WHITE motor lead. Secure with a wire
connector, (See Diagram N).
6. Replace both electrical box covers.
NOTE: When using the HSUL or GPAK Series for a water heater only, the ORANGE,
YELLOW and BLUE wires in the Power Venter are not used.
7. Skip to Page 8, “24 VAC Connection To Water Heater Controls”.
115 VAC INTERLOCK WITH HST, GPAK-T POWER VENTERS OR DRAFT INDUCER WITH 950-1067 RELAY/TIMER
1. Remove the BLACK motor lead from terminal BLK MTR of the Venter Relay/Timer, (See Diagram O)
2. a) Cut off the female quick connect, (Diagram P). b) Strip the insulation back approximately 1/2”, (Diagram Q). c) Connect this
lead to the GRAY pigtail lead from the WHK-2. Secure with a wire connector, (Diagram R).
3. Push the new GRAY quick connect back onto terminal BLK. MTR. of the Venter Relay/Timer, (See Diagram S).
4. Connect the BLACK lead that is connected to terminal L1 of the Venter Relay/Timer to the BLACK wire from the
WHK-2 Module, secure with a wire connector, (See Diagram T).
NOTE: This connection allows the Venter to operate independently of the WHK-2 Module through the furnace/boiler control circuit.
5. Connect the WHITE lead from the WHK-2 to the WHITE lead connected to terminal L2 of the Venter Relay/Timer and
the WHITE motor lead. Secure with a wire connector, (See Diagram U).
6. Replace both electrical box covers.
7. Skip to Page 8, “24 VAC Connection To Water Heater Controls”.
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5
DIAGRAM N
DIAGRAM R
DIAGRAM U
DIAGRAM P DIAGRAM Q
NOTE: When using the HST, GPAK-T or Draft
Inducer with a 950-1067 Relay/Timer for a
water heater only, the wires from the #4 & #5
terminals on Relay/Timer and the YELLOW
and BLUE wires from the Fan Proving Switch in
Power Venter are not used.
ALL DIAGRAMS BELOW SHOW AN HST, GPAK-T POWER VENTER OR DRAFT INDUCER ELECTRICAL BOX WITH
950-1067 RELAY/TIMER. NOTE: GPAK-T RELAY/TIMER MAY LOOK DIFFERENT THAN SHOWN, HOWEVER,
TERMINAL DESIGNATIONS ARE THE SAME.
DIAGRAM T DIAGRAM S
DIAGRAM O