REV. 11/97
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
MODELS DESCRIPTION
*GPAK-JT* FOR GAS APPLIANCES WITH A BTU/HR INPUT OF 120,000 OR LESS
WHICH REQUIRE A POWER VENTER POST PURGE
*GPAK-1T* FOR GAS APPLIANCES WITH A BTU/HR INPUT FROM 100,000 TO
250,000 WHICH REQUIRE A POWER VENTER POST PURGE
NOTE: THE *GPAK* MODELS INCLUDE A 4” DRAFT CONTROL AND ARE
AUTHORIZED FOR USE ON FURNACES ELIGIBLE FOR THE HTPV
CORRECTIVE ACTION PROGRAM. INSTALLATIONS FOR THE HTPV
CORRECTIVE ACTION PROGRAM MUST USE TYPE “B” VENT.
OWNER INSTRUCTIONS, DO NOT DESTROY
!
Recognize this symbol as an indication of important Safety Information!
NOTE: FLUE GAS TEMPERATURES MUST NOT EXCEED
600oF AT VENT SYSTEM INLET.
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, ADJUSTMENT, SERVICE OR MAINTENANCE POSSIBLY RESULTING IN FIRE, ELECTRICAL SHOCK, CARBON MONOXIDE POISONING, EXPLOSION, OR PERSONAL
INJURY OR PROPERTY DAMAGE.
DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP
IN A SAFE PLACE ON JOB SITE FOR FUTURE REFERENCE.
Copyright © 1998, Tjernlund Products, Inc. All rights reserved. P/N 8504034
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 ................................................................................................................................................7-9
INSTALLATION RESTRICTIONS ................................................................................................................... 7
SEQUENCE OF OPERATION ........................................................................................................................ 7
WIRING TO GAS VALVE ................................................................................................................................ 8
ALTERNATIVE WIRING WITH THERMOSTAT .............................................................................................. 9
OPERATION CIRCUIT CHECK .................................................................................................................................... 9
SAFETY INTERLOCK/COMBUSTION AIR TEST .......................................................................................................10
AIR FLOW ADJUSTMENT .......................................................................................................................................... 10
TROUBLESHOOTING .......................................................................................................................................... 10 -12
MAINTENANCE .......................................................................................................................................................... 12
HOW TO OBTAIN SERVICE & LIMITED WARRANTY ......................................................................................... 12-13
PERFORMANCE CURVES ........................................................................................................................................ 13
VH1-4 VENT HOOD MOUNTING TEMPLATE ........................................................................................................... 14
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* Series is a complete venting system designed to Side Wall Vent Natural and LP gas heating appliances. Each *GPAK*
comes with three major components: A Power Venter, Vent Hood and DC-4” Draft Control. The GPAK-JT can handle a maximum
BTU/HR input of 120,000. The GPAK-1T can handle BTU/HR inputs from 100,000 to 250,000. The “T” of the GPAK-JT 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.
GPAK SIZING
Verify that the GPAK you are about to install is properly sized for the appliance.
1. If installing the GPAK-JT, confirm that the BTU/HR. input of the appliance is 120,000 or less. If installing the 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.
*GPAK-JT*
MODEL SELECTION TABLE
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. Installations for the HTPV
Corrective Action Program must 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.
*GPAK-1T*
1
EQUIVALENT PIPE LENGTH CALCULATION EXAMPLE
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
POWER VENTER
*GPAK-JT*
*GPAK-1T*
VENT HOOD
INSTALLATION RESTRICTIONS
Do not install the Power Venter on incinerators, condensing type appliances or solid-fuel burning appliances. Only install the Power
Venter on appliances equipped with a draft hood, draft diverter or barometric draft control.
INSTALLATION
Do not install the Power Venter on an appliance with an automatic valve having a manual opener unless the manual opener has been
rendered inoperative or the automatic valve has been replaced with a valve not equipped with a manual opener.
Failure to install, maintain and/or operate the Power Venter in accordance with manufacturer's instructions may result in conditions
which can produce bodily injury and property damage.
2
The Power Venter must be installed by a qualified installer in accordance with these instructions and all local codes or in their
absence in accordance with the latest edition of The National Fuel Gas Code (NFPA #54), the latest edition of the National Electrical
Code (NFPA#70) and the Occupational Safety and Health Act (OSHA) when applicable. Improper installation can create a hazardous
condition such as an explosion, fire, electrical shock or carbon monoxide poisoning resulting in property damage, personal injury or
death.
Disconnect the power supply when making wiring connections or when working around the fan wheel and motor. Failure to do so can
result in electrical shock, personal injury, death or property damage.
1. “Qualified Installer” shall mean an individual properly trained and licensed
2. The installer must write or imprint name, phone number, date of installation and sign in the appropriate space on the Power Venter
nameplate.
3. Plan the vent system so that Code required distances are maintained from plumbing and wiring.
4. The Power Venter motor shaft must be mounted horizontally to ensure proper operation of the Fan Proving Switch and prevent
motor bearing wear.
5. Make certain the power supply is adequate for the fan motor requirements. Do not add the Power Venter to a circuit where the
total load is unknown.
6. The installer must verify that the BTU/hr. input of the appliance does not exceed the recommended input of the GPAK. See selec-
tion table on page 1 of these instructions for sizing information.
7. Flue gas temperatures must not exceed 600 degrees F. at the Power Venter inlet. Ambient temperatures must not exceed 104
degrees F. Temperatures above this range can cause a fire resulting in property damage, personal injury or death.
8. A safety inspection of an existing appliance must be performed before installation of the GPAK as outlined in ANSI Z223.1/NFPA
#54, Appendix H, see top of page 4.
9. The electrical load controlled through the Fan Proving Switch must not exceed the electrical ratings marked on the Fan Prover.
Improper installation, adjustment, alterations, service or maintenance can cause injury or property damage. Refer to
this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier.
INSTALLER NOTES
1. The installer must read and follow these instructions carefully to assure proper installation and operation of the GPAK.
2. The installer must fill in the required information on the nameplate located on the Power Venter electrical box cover.
3. The installer must affix the appropriate wiring diagram label included with these instructions to the appliance casing adjacent to its
rating plate.
4. The appliance(s) may only be installed on the suction side of Power Venter.
5. The installer must notify the homeowner of the maintenance required with the use of the product.
6. The installer must verify that the pilot safety controls (if so equipped) of the appliance are in good operating condition before instal-
lation of the GPAK.
7. No more that 2 appliances may be vented by the GPAK.
8. The Power Venter must not be installed into any portion of a vent system which serves appliances other than the one(s) vented by
the GPAK.
9. The installer must shut off all electricity and gas to the appliance using the appliance circuit breaker/fuse for the electricity and shut
off valve in the supply line to the appliance for the gas before installation of the GPAK.
10. If installing the GPAK on a furnace, the installer must check the limit and fan control for proper operation. Limit control operation
can be checked by blocking the circulating air inlet or temporarily disconnecting the electrical supply to the blower motor and
determining that the limit control acts to shut off the main burner gas.
11. If installing the GPAK on a boiler, the installer must determine that the water pumps, low water cutoffs, automatic feed controls,
pressure temperature limit controls and relief valves are in proper operating condition by following the manufacturer’s recommended testing procedure.
3
*SAFETY INSPECTION OF A PREVIOUSLY USED GAS APPLIANCE
(Perform prior to GPAK installation)
The following procedure is intended as a guide to aid in determining that an appliance is properly installed and is in safe condition for
continuing use.
The following procedure is based on central furnace and boiler installations and it should be recognized that generalized procedures
cannot anticipate all situations. Accordingly, in some cases deviation from this procedure may be necessary to determine safe opera-
tion of the equipment.
a. Perform this procedure prior to any attempt at modifications of the appliance or installation of the GPAK.
b. If it is determined there is a condition which could result in unsafe operation, shut off the appliance and advise the owner of the
unsafe condition.
Follow the steps below in making the safety inspection:
1. Conduct a gas leakage test of the appliance piping and control system downstream of the shutoff valve in the supply line to the
appliance.
2. Visually inspect the venting system and determine there is no blockage or restriction, leakage, corrosion and other deficiencies
which could cause an unsafe condition.
3. Shut off all gas to the appliance(s).
4. Inspect burners and crossovers for blockage and corrosion.
5. Applicable only to furnaces: Inspect heat exchanger for cracks, openings or excessive corrosion. Check both the limit control
and fan control for proper operation.
6. Applicable only to boilers: Inspect for evidence of water or combustion product leaks. Determine that the water pumps are in
operating condition. Test low water cutoffs, automatic feed controls, pressure and temperature limit controls and relief valves in
accordance with the manufacturer's recommendations to determine that they are in operating order.
* Excerpts from the National Fuel Gas Code (ANSI Z223.1/NFPA #54), Appendix H.
VENT HOOD LOCATION
If possible, locate the Vent Hood on a wall that does not face the direction of prevailing winds. This will diminish the possibility of
appliance interruption during periods of extreme winds.
If possible, locate the Vent Hood no closer than 3 feet from an inside corner of an L-shaped structure.
CODE REQUIREMENTS
Terminate the vent system so that proper minimum clearances are maintained as cited in the latest edition of the National Fuel Gas
Code (NFPA # 54) and the latest edition of NFPA #211, or as follows:
• Not be less than 7 feet above grade when located adjacent to public walk ways.
• At least 3 feet above any forced air inlet located within 10 feet.
• At least 4 feet below, 4 feet horizontally from or 1 foot above any door, window or gravity air inlet into any building.
• At least 12 inches above grade.
• So that the flue gases are not directed so as to jeopardize people, overheat combustible structures or enter buildings, and
• Not less than 2 feet from an adjacent building.
4
VENT HOOD INSTALLATION
1. Attach the template on page 14 to the interior of the wall the vent hood will be penetrating.
2. Verify that wall penetration will not come in contact with concealed wiring or plumbing. Using a 1/2” drill bit, drill two pilot holes
where noted on the template. The drill bit must be long enough to penetrate to the building exterior.
3. Attach the template to the building exterior aligning the pilot holes on the template with the pilot holes drilled in step 2.
4. Using a reciprocating saw, cut an opening through the building siding, wall board, etc., following the appropriate lines of the template.
5. Slide the Vent Hood through the opening and fasten to exterior wall using provided screws.
6. Once Power Venter is completely installed and secured, apply a bead of exterior rated caulk between Vent Hood flange and exterior of building.
POWER VENTER INSTALLATION
CODE REQUIREMENTS
The Power Venter installation must be done in accordance with the following requirements of the latest Edition of the National Fuel
Gas Code (NFPA #54):
• All portions of the vent system under positive pressure during operation (on the outlet side of Power Venter) shall be designed and
installed so as to prevent leakage of flue or vent gases into the building,
• All appliances must enter the vent system on the inlet side of the Power Venter,
• Provision shall be made to interlock the appliance(s) to prevent the flow of gas to the main burners when the draft system is not
performing so as to satisfy the operating requirements of the equipment for safe performance. See “Electrical Wiring” section of
this manual for details.
INSTALLER NOTES
1. All vent pipe and reducers must be supplied by the installer and are available from your heating wholesaler.
2. To prevent motor bearing wear and to ensure proper Fan Proving Switch operation, the Power Venter must be mounted with shaft
of the motor horizontal, (See Diagram A).
DIAGRAM A
3. If the appliance flue is greater than 4 inch, install a tapered
reducer on the appliance and run 4 inch vent pipe from the
appliance to the Power Venter, (See Diagram B).
DIAGRAM C
DIAGRAM B
4. The Power Venter housing is single wall, a 6 inch clearance
to combustible materials must be maintained, (See Diagram C).
5
DRAFT CONTROL INSTALLATION
When installing any GPAK-Series Side Wall Venting System on a fan assisted furnace a barometric draft control must be added. The
draft control provides pressure relief to neutralize over-drafting and allows a means of draft adjustment for optimum furnace efficiency.
By adjusting the draft control the installer can obtain the furnace manufacturer’s recommended draft setting.
Install the vent pipe and draft control as shown in the diagrams below. The draft control should connect to a tee off of the furnace flue
outlet.
The GPAK-Series Venting System may only be used with furnaces capable of being chimney vented. It is not suitable for use on
high-efficiency, condensing models.
(UPFLOW FURNACE)
(HORIZONTAL FURNACE)
POWER VENTER MOUNTING
1. Slide the outlet of the Power Venter over the inlet of the Vent Hood and connect them together using the provided screws,
(See Diagram D). For the HTPV Corrective Action Program, if you are unable to make a direct connection to the Vent Hood, a
maximum 1 foot length of type “B” vent pipe may be installed between the outlet of the Power Venter and Vent Hood. NOTE: Seal
all seams after Power Venter discharge to assure no flue gas leakage, (See Diagram E). No elbows may be installed on discharge
side of Power Venter for the HTPV Corrective Action Program.
DIAGRAM D
MAXIMUM ONE ONE FOOT SECTION OF “B” VENT
ALLOWED BETWEEN POWER VENTER AND VENT
HOOD FOR THE HTPV CORRECTIVE ACTION
PROGRAM. ALL SEAMS ON THE POSITIVE SIDE
OF POWER VENTER TO BE SEALED WITH HIGH
TEMPERATURE SILICONE CAULK
DIAGRAM E
6
2. To facilitate installation and reduce vibration we have included 2 mounting
DIAGRAM F
brackets, 2 rubber isolaters and 2 rubber grommets. One of the brackets
may be used temporarily as a third hand while positioning it for permanent
installation.
3. When installing the Power Venter for horizontal mount, install one of the
brackets to the electrical box using the nut/screw provided. Install the
other to the damper rod as shown to the right. When installing the Power
Venter for vertical mount, only one bracket is needed. This bracket
should be mounted to the motor as shown to the right. Temporarily
support the Power Venter using wire or a ladder and assemble the mounting brackets, (See Diagram F).
4. Install plumbers strap from the Power Venter to the floor joist, (See
Diagram F).
5. Install 4 inch vent pipe from the Power Venter inlet to the appliance flue
outlet avoiding elbows when possible.
ELECTRICAL WIRING
INSTALLATION RESTRICTIONS
1.The installer must ensure that all electrical connections between the appliance and Power Venter are tight and that all wires are
positioned and secured so they cannot come in contact with high temperature locations. Use adequate conduit supports where
necessary.
2. The installer must ensure that the internal appliance transformer is rated no lower than 40VA..
3. The installer must ensure that the heat anticipator in the comfort thermostat is adjusted according to the thermostat manufacturers
recommendation.
4. All wiring From the Power Venter to the appliance must be appropriate Class 1 wiring as follows: installed in rigid metal conduit,
intermediate metal conduit, rigid non-metallic conduit, electrical metallic tubing Type MI, Type MC Cable, or otherwise be suitably
protected from physical damage.
5. The Fan Proving Switch is not suitable for loads which exceed the limitations below. The electrical contact ratings for the Fan
Proving Switch are as follows:
3 AMPS (full load) at 120VAC; 28VA Pilot Duty (1.16 Amps) at 24VAC; 125VA Pilot Duty at 120VAC
6. All 24V wiring must be at least 18 AWG. All 115V wiring must be at least 14 AWG.
7. All wiring must be in compliance with local codes or in their absence, with the latest Edition of the National Electric Code (NFPA #70).
8. Disconnect 115V power before attempting to wire the Power Venter to the appliance. Power may be disconnected by means of
the appliance circuit breaker/fuse.
*GPAK-JT* / *GPAK-1T* SEQUENCE OF OPERATION WIRED TO GAS VALVE:
As the thermostat/aquastat senses a need for heat, the internal switch of the thermostat/aquastat will close. The Switch closure completes the 24V electrical circuit to the internal controls of the appliance. Before the 24V signal reaches the appliance gas valve, it is
interrupted by the Power Venter Relay/Timer and Fan Proving Switch. When the Power Venter Relay/Timer receives the 24V signal,
the contact side closes completing the 115V circuit to the Power Venter motor. The air movement generated by the Power Venter
closes the Fan Proving Switch and completes the circuit to the appliance gas valve. The appliance gas valve will only receive power
when the appliance thermostat/aquastat is calling for heat and the Power Venter is operating. When the appliance thermostat/aquas tat is satisfied, 24V will be discontinued to the Relay/Timer and the Power Venter will continue to operate for a non-adjustable post
purge period of approximately 45 seconds.
NOTES:
While it is impossible to include every possible wiring scenario, the following diagrams represent the most common. If wiring the
GPAK to an appliance not equipped with the controls shown on the following diagrams, determine which terminals of the gas valve
are considered “HOT” and “COMMON” and follow the steps on the bottom of page 8 for the GPAK-JT/GPAK-1T.
When wiring Power Venter to the gas valve wire all thermostats, zones, circulators and limits as would normally be done if venting into
a chimney.
If you are unable to wire the GPAK as outlined in these instructions, call our Customer Service department toll free at 1-800-255-4208
for fast assistance.
NAT
8
ALTERNATIVE THERMOSTAT WIRING FOR SINGLE ZONE INSTALLATIONS
SEQUENCE OF OPERATION ON PAGE 7 CHANGES AS FOLLOWS WHEN WIRING WITH SINGLE ZONE THERMOSTAT:
Adjust the furnace thermostat to call for heat. The Power Venter should start. After a slight delay, the furnace burner should fire.
The delay is caused by the Power Venter fan proving switch. The delay will be no more than 4 seconds, if you are unable to detect a
slight delay, contact Tjernlund Products, Inc. at 1-800-255-4208 for assistance. When the fan proving switch closes, the furnace combustion relay is energized. Normal combustion sequence for the furnace begins: Induced draft furnace blower starts, its proving
switch makes energizing ignition control and/or gas valve. DO NOT OPERATE THE FURNACE WITHOUT THE FAN PROVING
SWITCH WIRED INTO THE 24V FURNACE CIRCUIT!
NOTE: When Power Venter is interlocked with thermostat wire all zones, circulators and limits as would normally be done if
venting into a chimney.
If you are unable to wire the GPAK as outlined in these instructions, call Tjernlund’s Customer Service Department toll free at
1-800-255-4208 for fast assistance.
WIRING GPAK-JT/GPAK-1T WITH THERMOSTAT
OPERATION CIRCUIT CHECK
1. After all appliance and GPAK wiring is complete, establish 115V power to the appliance and Power Venter with the appliance
thermostat/aquastat not calling for heat. The Power Venter may operate when power is first established, wait until the Power
Venter shuts off before continuing.
2. Adjust the appliance thermostat/aquastat to call for heat. At this point, the Power Venter should start. After a slight delay, the
appliance burner should fire. The delay is caused by the Power Venter Fan Proving Switch. The delay will be no more than 4
seconds, if you are unable to detect a slight delay, contact Tjernlund Products, Inc. at 1-800-255-4208 for assistance.
A)Wired to gas valve: When the Power Venter Fan Proving Switch closes, the circuit to the gas valve is completed.
B)Wired to thermostat: When the Power Venter Fan Proving Switch closes, the furnace combustion relay is energized,
Normal combustion sequence for the furnace begins: Induced draft furnace blower starts, its proving
switch makes energizing ignition control and/or gas valve.
DO NOT OPERATE THE APPLIANCE WITHOUT THE FAN PROVING SWITCH WIRED INTO THE 24V APPLIANCE CIRCUIT!
3. Adjust the appliance thermostat/aquastat so that no heat is required. At this point the Power Venter and appliance should shut off.
NOTE: With the GPAK-JT or GPAK-1T, the Power Venter will continue to run for a non-adjustable time of approximately 45
seconds after the appliance burner shuts off.
9
COMBUSTION AIR
Adequate combustion air is vital for proper combustion and for safe venting. Likewise, for proper GPAK performance, adequate com bustion air must be available to the appliance. Many installers assume adequate combustion air is present, especially in older homes.
In some cases this is a false assumption, because many older homes have been made "tight" due to weatherization. Size the com bustion air opening(s) into the appliance room as outlined NFPA 54/NFPA 211. Tjernlund’s IN-FORCERTMengineered combustion air
intakes provide a convenient, interlocked way to supply combustion air to the utility room. When installing a GPAK it is not necessary
to supply any more combustion air than normally required when conventional venting.
SAFETY INTERLOCK / COMBUSTION AIR TEST
The Power Venter Fan Proving Switch is designed to disable the appliance gas valve upon Power Venter failure only! It is not
designed and cannot replace, regular vent system inspection, appliance servicing and combustion testing.
1. Close all doors and windows of the building. If the appliance is installed in a utility room or closet, close the entrance door to this
room. Close fireplace dampers.
2. Turn on clothes dryer and all exhaust fans such as range hoods, bathroom exhausts and whole house fans to maximum speeds.
(Do not operate a fan used strictly for Summer exhausting).
3. Following the appliance manufacturer’s instructions, place the appliance in operation, set thermostat for continuous operation.
4. Allow fans and appliance to operate for 5 minutes.
5. Test for spillage at the appliance draft hood, draft control or draft diverter relief opening using the flame of a match, candle or
smoke from a cigarette, cigar or pipe and determine the following:
A)The flame or smoke is being drawn into the draft hood, draft control or draft diverter.
B)The main burner is burning properly, i.e. no floating, lifting or flashback. Adjust the primary air shutter(s) and Power Venter air flow
adjustment as required.
C) If the appliance is equipped with high and low flame controlling or flame
modulation, check for proper main burner operation at low flame,
(See Diagram G).
If the draw of the flame or smoke appears to be excessive, follow the “Air
Flow Adjustment” procedure outlined below.
6. Sign and date these instructions to verify that the safety interlock /
combustion air test was completed. These instructions must
remain on premises.
SIGN:____________________________________
DATE:_____________________
AIR FLOW ADJUSTMENT
1. With all exhaust fans and appliance operating as instructed in “Safety
Interlock/Combustion Air Test”, set the Air Flow Adjustment by loosening
locknut and turning rod handle. CAUTION: HANDLE MAY BE HOT, USE
PLIERS TO MOVE HANDLE. Position of rod handle indicates the position
of Air Flow Adjustment inside housing.
2. Using pliers, move handle towards minimum draft setting until spillage is
detected at draft hood relief opening, then re-open Air Flow Adjustment
just enough to eliminate spillage.
3. Lock Air Flow Adjustment at desired setting by tightening locknut.
4. Return appliance, doors, windows, exhaust fans and fireplace dampers to
their previous conditions of use.
DIAGRAM G
TROUBLESHOOTING
The following guide is intended to be used if a problem occurs during the use of the GPAK side wall vent system. At several steps
throughout the guide you will come in close contact with 115 Volts. Extreme caution must be exercised to prevent injury. If you
are unable to determine the defective part with the use of this guide, call your Tjernlund distributor or Tjernlund Products direct at
1-800-255-4208 for further assistance.
10
SYMPTOM 1: POWER VENTER DOES NOT RUN DURING CALL FOR HEAT
Step 1.
Activate thermostat to call for
heat. Check for 24V across
terminals 4 and 5 of the
Relay/Timer (GPAK-JT/1T) or
the coil of Ice Cube Relay with
the BLUE and ORANGE leads
attached (GPAK-J/1).
24V
Step 2.
Remove 115V power source to
the Power Venter. Remove
the two BLACK leads from the
Relay and connect them
together. Reestablish 115V.
Result: Power Venter runs
continuously.
Yes
Solution: Replace Relay/Timer
(GPAK-JT/1T) Part # 950-0014
non-adjustable or Part # 950-1067
adjustable Relay/Timer or for
(GPAK-J/1) Ice Cube Relay
Part # 950-1040
24Volts
Not Present
No
Step 1.1
Interlocked directly with gas valve
Verify 24V across appliance control such
as (Aquastat B1/B2), (Intermittent Ignition
Module MV - MV/PV), or (Standing Pilot
TH - Hot & TR - Common) during call for
heat.
Interlocked with thermostat at furnace
Verify 24V across R & C on furnace terminal strip.
No
Solution: Contact appliance manufacturer
for further assistance
Solution: Replace Power Venter Motor.
Part # 950-1020
24V
Step 1.2
Interlocked directly with gas valve
Check for loose connections between appliance and Power Venter.
Interlocked with thermostat at furnace
Contact T-Stat manufacturer for further
assistance
SYMPTOM 2: POWER VENTER RUNS CONTINUOUSLY / ERRATICALLY
Step 1.
Confirm that thermostat is not
calling for heat.
No call for heat
Step 2.
With the Power Venter running, remove the ORANGE wire
on Relay/Timer terminal #5 (GPAK-JT/1T) or the ORANGE
wire from Ice Cube Relay (GPAK-J/1).
Result: Power Venter should shut off within approximately 45
seconds (GPAK-JT/1T). Power Venter should shut off immediately for GPAK-J/1.
Yes
Step 3.
Reinstall the ORANGE wire on Relay. Verify thermostat is not calling for heat.
Interlocked directly with gas valve
Check for 24V across appliance control such as (Aquastat B1/B2), (Intermittent
Ignition Module MV - MV/PV) or (Standing Pilot TH - Hot & TR - Common).
Interlocked with thermostat at furnace
Check for voltage across W & C at thermostat.
24 Volts not present
No
Solution: Replace Relay/Timer (GPAK-JT/1T) Part # 950-0014
non-adjustable or Part # 950-1067 adjustable Relay/Timer or for
(GPAK-J/1) Ice Cube Relay Part # 950-1040
24 Volts present
Solution: Contact the appliance manufacturer for further assistance
Contact Tjernlund Products, Inc. for
additional assistance.
11
SYMPTOM 3: POWER VENTER RUNS BUT APPLIANCE DOESN’T
Step 1.
Confirm that thermostat is not
calling for heat.
No call for heat
Step 2.
Remove the BLUE and YELLOW wires from
Power Venter Proving Switch. Activate thermostat 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
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.
Bad
Tube
Contact Tjernlund
Products for replace ment tube.
Yes
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
Contact Tjernlund Products, Inc. for
additional assistance.
Tube Ok
Step 2.2
Examine Power Venter wheel
for particulate build-up.
Wheel Clean
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.
Yes
Solution: Replace Fan Proving
Switch Part # 950-1030
Wheel
Dirty
Clean Power Venter Wheel.
Supply adequate combustion air, proper
No
Power Venter or
reduce vent pipe
length.
MAINTENANCE
1. For optimum motor life, oil motor every six months with 2 drops of S.A.E. #20. The oil ports are located on the top of the motor.
Magnetek motors do not need to be oiled.
2. The homeowner must semiannually inspect the Vent Hood and vent pipe for blockage, corrosion and leaks.
3. A vent system inspection must be performed annually by a qualified service agency. The inspection should include the operation
circuit check, safety interlock test, combustion air test and a visual inspection of the complete vent system for corrosion, blockage
or leaks. Any corrosion, blockage or leaks detected must be repaired or replaced immediately.
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 replacement parts or any other service calls or repairs. Products that are tampered with, damaged, or defective due to malfunctioning appliances are not covered under this warranty. This warranty DOES NOT cover the complete Power Venter if it is operative, except for
the defective part.
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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/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 Power
Venter to ensure that the defective 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 Power Venter date
code component was taken from. The date code is located on the Electrical Box coverplate. If Power Venter 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.
REPLACEMENT PARTS
DESCRIPTION PART NUMBER
Vent Hood* VH1-4
Motor* 950-1020
Fan Prover* 950-1030
GPAK-JT Wheel 950-1010
GPAK-1T Wheel 950-1011
GPAK-JT/GPAK-1T Relay/Timer ** (approx. 45 second non-adjustable delay) 950-0014
GPAK-JT/GPAK-1T Relay/Timer** (1 to 10 minute adjustable delay) 950-1067
* These parts are common to all GPAK’s
** Either Relay/Timer is suitable for the GPAK-JT/GPAK-1T
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
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, whichever 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 WARRANTIES 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 regarding warranty work to Tjernlund Products, Inc. 1601 9th Street, White Bear Lake, MN 55110-6794. Phone (612)
426-2993 • (800) 255-4208 • Fax (612) 426-9547.
Installations for the HTPV Corrective Action Program have a limited 5 year warranty.
*
PERFORMANCE CURVES
*GPAK-JT*
*GPAK-1T*
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VH1-4 VENT HOOD MOUNTING TEMPLATE
1. Attach the Vent Hood Mounting Template to the interior of the wall the vent hood will be penetrating.
2. Ensure that proposed vent termination clearances are met before attempting to cut opening through exterior wall.
3. Verify that wall penetration will not come in contact with concealed wiring or plumbing. Using a 1/2” drill bit, drill two pilot holes
where noted on the template. The drill bit must be long enough to penetrate to the building exterior.
4. Attach the template to the building exterior aligning the pilot holes on the template with the pilot holes drilled in step 3.
5. Using a reciprocating saw, cut an opening through the building siding, wall board, etc., following the appropriate lines of the template.
6. Slide the Vent Hood through the opening and fasten to exterior wall using provided screws.
7. Once Power Venter is completely installed and secured, apply a bead of exterior rated caulk between Vent Hood flange and
exterior of building.
CUT OUT THIS SQUARE FOR THE VH1-4” VENT HOOD
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