User manual TJERNLUND WHK2 MILLIVOLT APPLIANCE INTERLOCK INST. (NOT COMPATIBLE WITH UC1) 8504026 REV A 0600

[. . . ] Discontinued Old-Style Switch TJERNLUND PRODUCTS, INC. 1601 Ninth Street · White Bear Lake, MN 55110-6794 PHONE (800) 255-4208 · (651) 426-2993 · FAX (651) 426-9547 Visit our web site · www. tjernlund. com IMPORTANT: This gas pressure switch is an updated version with only one 1/4" aluminum tubing connection to the pressure tap port of gas valve. The atmospheric vent connection is no longer required, as on the Old-Style Switch. Disregard the "Gas Pressure Switch" installation section of your VP-2/3, WHK-2, WHKE instruction manual if the old style switch is referenced, (See Discontinued Old-Style Switch Diagram). If you are replacing an OldStyle gas pressure switch with the new style gas pressure switch follow the instructions below. [. . . ] DIAGRAM H DIAGRAM I DIAGRAM J DIAGRAM K DIAGRAM L DIAGRAM M 4 5. 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. Skip to Page 8, "24 VAC Connection To Water Heater Controls". DIAGRAM N 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. 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. 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. Skip to Page 8, "24 VAC Connection To Water Heater Controls". 115 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 O DIAGRAM P DIAGRAM Q DIAGRAM R DIAGRAM S DIAGRAM T DIAGRAM U 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. 5 115 VAC INTERLOCK WITH HS115 - SERIES POWER VENTERS AND 115 VAC CONTROLLED DRAFT INDUCERS 1. Connect the GRAY wire from the WHK-2 Module to the BLACK 115 VAC motor lead of the Power Venter or Draft Inducer. Connect the WHITE wire from the WHK-2 to the WHITE wire from the Power Venter or Draft Inducer motor. IMPORTANT: The BLACK wire from the WHK-2 module is not used in these applications. Cut stripped end of this wire and wrap with suitable electrical tape to prevent contact with other live connections in wiring box. NOTE: When using the HS115 for a water heater only, the YELLOW and BLUE wires in the Power Venter are not used. Water heater calls for heat which sends a small amount of gas from the water heater pressure tap to the Gas Pressure Switch. Gas Pressure Switch closes completing the circuit between the WHK-2 Transformer and terminals 4 & 5 of WHK-2 Relay/Timer. When terminals 4 & 5 of the WHK-2 Relay/Timer receive 24V, an internal switch of the WHK-2 Relay/Timer closes between L1 and BLK. When the water heater thermostat is satisfied the Gas Pressure Switch will open, disrupting 24V to terminals 4 & 5 of the WHK-2 Relay/Timer. of the WHK-2 Relay/Timer remains closed for an adjustable time allowing the Power Venter/Draft Inducer to continue operating. WHK-2 SAFETY OPERATION: If the Venter fails to operate, flue gas spillage will occur from the water heater draft hood. [. . . ] Yes With the Blue and Orange wires connected to terminals 7 & 8 of Venter Relay and the Furnace/Boiler calling for heat, remove the Gray and thin Black wires from the Venter Relay and check for continuity between the terminals which the Gray and thin Black wires wire connected to. Part #950-1040 11 LIMITED PARTS WARRANTY AND CLAIM PROCEDURE Tjernlund Products, Inc. warrants the components of the WHK-2 for one year from date of installation. This warranty does not cover normal maintenance, transportation or installation charges for replacement parts or any other service calls or repairs. [. . . ]