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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 covers defects in
material and workmanship.  This warranty does not cover normal maintenance, transportation or installation charges  for replacement
parts or any other service calls or repairs.  This warranty DOES NOT cover the complete WHK-2 if it is operative, except for the
defective part.

Tjernlund Products, Inc. will issue credit or provide a free part to replace one that becomes defective during the one year warranty peri-
od.  If the part is over 18 months old, proof of date of the installation in the form of the contractor sales/installation receipt is necessary
to prove the unit has been in service for under one year.  All receipts should include the date code of the WHK-2 to ensure that the defec-
tive component corresponds with the complete unit.  This will help preclude possible credit refusal.

1.) Follow troubleshooting guide to determine defective component.  If unable to determine faulty component, contact your 

Tjernlund distributor or Tjernlund Products Technical Customer Service Department  at 1-800-255-4208 for troubleshooting 
assistance.

2.) After the faulty component is determined, return it to your Tjernlund distributor for replacement.  Please include WHK-2 date 

code component was taken from.  The date code is located on the Electrical Box coverplate.  If the date code is older than 18
months you will need to provide a copy of the original installation receipt to your distributor.  Credit or replacement will only be 
issued to a Tjernlund distributor after the defective part has been returned prepaid to Tjernlund.

COVERED PARTS

Component

Part Number

24V Solenoid Valve

950-2040

Gas Pressure Switch

950-2080

25’ Control  Cord

950-2060

24V Transformer

950-2030

Relay/Timer

950-1067

Linear Limit Spill Switch

950-2064

Pilot Saver Kit (Optional)

950-2061

WHAT IS NOT COVERED

Product installed contrary to our installation instructions
Product that has been altered, neglected or misused
Product that has been wired incorrectly
Product that has been damaged by a malfunctioning or mistuned burner
Any freight charges related to the return of the defective part
Any labor charges related to evaluating and replacing the defective part

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TJERNLUND LIMITED ONE YEAR WARRANTY

Tjernlund Products, Inc. warrants to the original purchaser of this product that the product will be free from defects due to faulty
material or workmanship for a period of (1) year from the date of original purchase or delivery to the original purchaser, whichev-
er is earlier.  Remedies under this warranty are limited to repairing or replacing, at our option, any product which shall, within the
above stated warranty period, be returned to Tjernlund Products, Inc. at the address listed below, postage prepaid.  THERE ARE
NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF, AND TJERNLUND PRODUCTS,
INC. EXPRESSLY DISCLAIMS LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF
THIS PRODUCT.  THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS WARRANTIES AND NO AGENT IS AUTHORIZED
TO ASSUME FOR US ANY LIABILITY ADDITIONAL TO THOSE SET FORTH IN THIS LIMITED WARRANTY.  IMPLIED WAR-
RANTIES ARE LIMITED TO THE STATED DURATION OF THIS LIMITED WARRANTY.  Some states do not allow limitation on
how long an implied warranty lasts, so that limitation may not apply to you.  In addition, some states do not allow the exclusion
or limitation of incidental or consequential damages, so that above limitation or exclusion may not apply to you.  This warranty
gives you specific legal rights and you may also have other rights which may vary from State to State.  Send all inquiries regard-
ing warranty work to Tjernlund Products, Inc. 1601 9th Street, White Bear Lake, MN 55110-6794.  Phone (651) 426-2993 • 
(800) 255-4208 • Fax (651) 426-9547.

Summary of Contents for WHK2 MILLIVOLT APPLIANCE INTERLOCK INST. (NOT COMPATIBLE WITH UC1) 8504026 REV A 0600

Page 1: ...Brass 1 8 NPT male x compression fitting See New Switch Diagram Use thread sealant do not over tighten IMPORTANT DO NOT alter the heater s PILOT GAS LINE See New Switch Diagram 6 Using a tube cutter cut the appropriate length of the supplied 1 4 tubing to reach from the gas pressure switch fitting to the PRESSURE TAP PORT fitting of the thermostat gas control valve Make sure each end of the tubing...

Page 2: ...S FOR PROPER OPERATION OF HEATER AND RE LIGHTING OF PILOT THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED LICENSED SERVICE PERSONNEL FOR PROPER INSTALLATION ADJUSTMENT AND OPERATION OF THIS UNIT READ THESE INSTRUCTIONS THOROUGHLY BEFORE ATTEMPTING INSTALLATION OR OPERATION FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN IMPROPER INSTALLATION ADJUST MENT SERVICE OR MAINTENANCE POSSIBLY RE...

Page 3: ...al connections 4 Visually verify that all connections of the control cord circuit are intact 5 Follow water heater manufacturer s re lighting instructions attached to water heater or located in water heater owner s manual USER NOTE Since the Power Venter Draft Inducer cannot operate during a power outage the safety interlock controls are designed to prohibit gas flow to the water heater Follow the...

Page 4: ...itioned so the top of the coil cover is on top of or horizontal to the Solenoid Valve Do not position so that the top of the coil cover is pointing downward All gas piping shall be tested and inspected in accordance with NFPA 54 ANSI Z223 1 part 4 Any leakages shall be located by means of an approved combustible gas detector soap and water or an equivalent nonflammable solution as applicable If le...

Page 5: ...1 Attach the Linear Limit sensing switch mounting bracket to the top of the water heater using the sheet metal screws provided The Linear Limit bracket should be approximately 1 2 from the draft hood See Diagram E 2 Attach the three Linear Limit capillary mounting brackets around the draft hood equally spaced 3 Insert the Linear Limit spillage sensing switch capillary into the U of the Linear Limi...

Page 6: ... 2 to an HST GPAK T Series Power Venter or Draft Inducer with 950 1067 Relay Timer refer to page 5 of these instructions for wiring details If interlocking the WHK 2 to an HSUL GPAK Series Power Venter or Draft Inducer with 950 1040 Relay refer to the steps below for wiring details 115 VAC INTERLOCK WITH HSUL GPAK SERIES POWER VENTERS OR DRAFT INDUCER WITH 950 1040 24 115 VAC RELAY 1 Remove the BL...

Page 7: ...nected 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 w...

Page 8: ...oses completing the circuit between the WHK 2 Transformer and terminals 4 5 of WHK 2 Relay Timer 3 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 MTR sending current to the Gray of the WHK 2 metal conduit 4 When the water heater thermostat is satisfied the Gas Pressure Switch will open disrupting 24V to terminals 4 5 of...

Page 9: ...RNACE OR BOILER AND WATER HEATER COMMON VENTED WHK 2 CONNECTED TO AN HST GPAK T SERIES POWER VENTER OR DRAFT INDUCER WITH 950 1067 RELAY TIMER FURNACE OR BOILER AND WATER HEATER COMMON VENTED NOTE On the GPAK T Series the wire color from terminal 4 of Relay Timer is BLUE The wire from terminal 5 is ORANGE ...

Page 10: ...mmon terminal of the Gas Pressure Switch Diagram V 2 Push the remaining BLACK lead from the 6 18 2 sensing switch cable onto one of the terminals on the Solenoid Valve Diagram W 3 Push the YELLOW lead from the 25 control cable onto the remaining terminal on the Solenoid Valve Diagram W 4 Push the RED lead from the 25 control cable onto the piggyback terminal joined with common on the Gas Pressure ...

Page 11: ...a potentially hazardous condition It is not designed to and cannot replace regular vent system inspection appliance servicing and combustion testing DO NOT USE IT AS A SUBSTITUTE FOR PROFESSIONAL APPLIANCE MAINTENANCE 1 Close all doors and windows of the building If appliance is installed in utility room or closet close the entrance door to this room Close fireplace dampers 2 Turn on clothes dryer...

Page 12: ... Venter Relay The Venter should shut off within 10 minutes Replace WHK 2 Relay Timer Part 950 1067 With the Blue and thin Black wires still removed from the previous step remove the Gray and Blue wires from the Venter Relay Check for continuity between the Venter Relay terminals which the Gray and thin Black wires were connected to Replace Venter Relay Part 950 1040 The Venter is not wired to the ...

Page 13: ...Venter motor wire Jump the Red Black and Blue wires on Water Heater Gas Pressure Switch The Venter should start SYMPTOM 3 HSUL GPAK SERIES POWER VENTER OR DRAFT INDUCER OPERATES WITH WATER HEATER NOT WITH FURNACE OR BOILER BEFORE CONTINUING THE WHK 2 SHOULD HAVE POWER THE WATER HEATER SHOULD BE OFF AND THE FURNACE OR BOILER SHOULD BE CALLING FOR HEAT Check wiring inside Venter electrical box from ...

Page 14: ...elay Timer 950 1067 Linear Limit Spill Switch 950 2064 Pilot Saver Kit Optional 950 2061 WHAT IS NOT COVERED Product installed contrary to our installation instructions Product that has been altered neglected or misused Product that has been wired incorrectly Product that has been damaged by a malfunctioning or mistuned burner Any freight charges related to the return of the defective part Any lab...

Page 15: ...TYPICAL APPLICATION 13 FURNACE OR BOILER WITH MILLIVOLT WATER HEATER MILLIVOLT WATER HEATER ...

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