Tjernlund GPAK-J,JT,1,1T (Discontinued) 8504013 Rev 3 09/97 - Manual (Page 2)

TABLE OF CONTENTS
PAGE(S)
GPAK DESCRIPTION .................................................................................................................................................. 1
GPAK SIZING ................................................................................................................................................................ 1
SPECIFICATIONS ......................................................................................................................................................... 2
INSTALLATION RESTRICTIONS .............................................................................................................................. 2-3
INSTALLER NOTES...................................................................................................................................................... 3
SAFETY INSPECTION OF EXISTING APPLIANCE INSTALLATION .......................................................................... 4
VENT HOOD LOCATION & INSTALLATION ............................................................................................................. 4-5
POWER VENTER INSTALLATION ............................................................................................................................ 5-7
ELECTRICAL WIRING ..............................................................................................................................................7-12
INSTALLATION RESTRICTIONS ................................................................................................................... 7
SEQUENCE OF OPERATION ........................................................................................................................ 7
WIRING TO GAS VALVE ............................................................................................................................. 8-9
ALTERNATIVE WIRING WITH THERMOSTAT ....................................................................................... 10-11
OPERATION CIRCUIT CHECK .................................................................................................................................. 12
SAFETY INTERLOCK/COMBUSTION AIR TEST .......................................................................................................12
AIR FLOW ADJUSTMENT .......................................................................................................................................... 13
MAINTENANCE .......................................................................................................................................................... 13
TROUBLESHOOTING ........................................................................................................................................... 13-15
HOW TO OBTAIN SERVICE & LIMITED WARRANTY ......................................................................................... 15-16
PERFORMANCE CURVES ................................................................................................................................... 16-17
VH1-4 VENT HOOD MOUNTING TEMPLATE ........................................................................................................... 18
Tjernlund Products welcomes your comments and questions. Call us at 1-800-255-4208, Fax 612-426-9547 or write to:
Customer Service, Tjernlund Products, Inc., 1601 Ninth Street, White Bear Lake, MN 55110-6794.
GPAK DESCRIPTION
The GPAK is a complete venting system designed to Side Wall Vent Natural and LP gas heating appliances. Each GPAK comes with
two major components: the Power Venter and the Vent Hood. The GPAK-J and GPAK-JT are identical in performance, each can
handle a maximum BTU/HR input of 120,000. The GPAK-1 and GPAK-1T are identical in performance, each can handle BTU/HR
inputs from 100,000 to 250,000. The “T” of the GPAK-JT and GPAK-1T indicates these kits have a post purge Relay/Timer which
allows the Power Venter to continue operating for a non-adjustable period of approximately 45 seconds after the appliance burner
shuts off. The GPAK-J and GPAK-1 are equipped with a 24/115V Relay without the post purge feature.
GPAK SIZING
Verify that the GPAK you are about to install is properly sized for the appliance.
1. If installing the GPAK-J or GPAK-JT, confirm that the BTU/HR. input of the appliance is 120,000 or less. If installing the GPAK-1 or
GPAK-1T, confirm that the BTU/HR. input of the appliance is between 100,000 and 250,000.
2. Determine that the equivalent vent pipe length to be installed is within the appropriate GPAK’s performance. An example of calcu-
lating the equivalent vent pipe length is shown on page 2.
NOTES
1. If the appliance flue outlet is greater than 4”, install a
tapered reducer directly after the draft hood, draft
diverter or barometric draft control, reducing vent pipe
diameter to 4”. All vent pipe from the appliance to the
Power Venter may be 4”.
2. Table is based on straight vent pipe. 90 degree
elbows are equivalent to 6 feet of straight vent pipe,
45 degree elbows are equivalent to 3 feet of straight
vent pipe. An example of calculating equivalent pipe
length is on top of page 2.
3. Determine maximum pipe length from type of equip-
ment being vented and GPAK Model. Category A
pipe runs over 30 linear feet should use Type “B”
vent. Category B & C pipe runs over 15 linear feet
should use Type “B” vent.
4. Column C allows for up to a 40,000 BTU/hr. Input atmospheric water heater common vented with a fan assisted appliance from column B.
5. All reducers and vent pipe are to be supplied by the installer and are available from your local heating wholesaler.
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MODEL SELECTION TABLE