Tjernlund GPAK-J,JT,1,1T (Discontinued) 8504013 Rev 3 09/97 - Manual (Page 16)

HOW TO OBTAIN SERVICE ASSISTANCE
1. If you have any questions about your Power Venter or if it requires adjustment, repair or routine maintenance, we suggest that
you contact your installer, contractor or service agency.
2. If you require technical information contact Tjernlund Products, Inc. at 1-800-255-4208.
When contacting Tjernlund Products, Inc., please have the following information available:
1. Model name of the Power Venter as shown on the label attached to Power Venter.
2 Name and address of installer and any service agency who performed work on Power Venter.
3. Date of original installation and dates any service work was performed.
4. Details of the problem as you can best describe them.
LIMITED PARTS WARRANTY AND CLAIM PROCEDURE
Tjernlund Products, Inc. warrants the components of its products 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 replace-
ment parts or any other service calls or repairs. Products that are tampered with, damaged, or defective due to malfunctioning appli-
ances are not covered under this warranty. This warranty DOES NOT cover the complete Power Venter if it is operative, except for
the defective part.
Tjernlund Products, Inc. will issue credit to the original distributor or provide a free part to replace one that becomes defective during the
one year warranty period. If the part is over 18 months old, proof of date of the installation in the form of the contractor sales/installa-
tion receipt is necessary to prove the unit has been in service for under one year. All receipts should include the date code of the Power
Venter to ensure that the defective component corresponds with the complete unit. This will help preclude possible credit refusal.
15
SYMPTOM 3: POWER VENTER RUNS BUT APPLIANCE DOESN’T
No
Bad
Tube
Wheel
Dirty
Contact Tjernlund
Products for replace-
ment tube.
Clean Power Venter Wheel.
Supply ade -
quate combus -
tion air, proper
Power Venter or
reduce vent pipe
length.
Step 2.
Remove the BLUE and YELLOW wires from
Power Venter Proving Switch. Activate ther -
mostat to call for heat. With Power Venter
running, check for continuity across the COM
and N/O terminals of Fan Proving Switch.
Result: Contacts on switch should be closed.
No call for heat
Contact Tjernlund Products, Inc. for
additional assistance.
Step 1.
Confirm that thermostat is not
calling for heat.
Step 3.
Replace BLUE to COM and YELLOW to N/O on Fan Proving Switch.
Confirm that leads from Fan Prover are connected as follows:
Interlocked directly with gas valve
YELLOW wire is connected to the TH (HOT) on gas valve and BLUE
is connected to appliance control (Aquastat B1), (Intermittent Ignition
Module MV) or (Standing Pilot TH - Hot ).
Interlocked with thermostat at furnace
YELLOW wire connected to W on furnace terminal strip and BLUE is
connected to W from T-Stat.
Yes
Yes
Step 2.3
Confirm adequate combustion air is present in
appliance location, Power Venter is sized properly
for application and vent runs do not exceed maxi-
mum length.
Solution: Replace Fan Proving
Switch Part # 950-1030
Step 2.2
Examine Power Venter wheel
for particulate build-up.
Tube Ok
Yes
Wheel Clean
No
Step 2.1
Examine Fan Prover sensing tube for
kinks, misalignment or blockage. Sensing
tube should be at an approx. 90 degree
angle to wheel.