Tjernlund VP-2F, VP-3F Airotronics Timer 8504140 Rev A 11/11 - Manual (Page 4)

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INSTALLATION RESTRICTIONS
The Power Venter shall not be installed on incinerators, condensing type appliances or solid-fuel burning appliances.
The Power Venter may only be installed on appliances equipped with a draft hood, draft diverter or barometric draft control.
The Power Venter shall not be installed 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.
CAUTION:
1. 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 Electric Code (NFPA #70) and The Occupational Safety and Health Act (OSHA)
when applicable. If improperly installed a hazardous condition such as an explosion or carbon monoxide poison
accumulation could result.
3. “Qualified Installer” shall mean an individual properly trained and licensed.
4. The installer must write or imprint name, phone number, date of installation and sign in the appropriate space on the Power Venter
nameplate.
5. Plan the vent system so that Code required distances are maintained from plumbing and wiring.
6. The Power Venter motor shaft must be mounted horizontally to prevent motor bearing wear.
7. Flue gas temperature must not be exceed 575 0 F at Power Venter inlet. Ambient temperature must not exceed 104 0 F.
8. Disconnect power supply when making wiring connections or when working around the fan blade and motor. Failure
to do so may result in severe personal injury and equipment damage.
9. Make certain the power source is adequate for the fan motor requirements. Do not add the Power Venter to a circuit
where the total load is unknown.
10. The installer must verify that the BTU/hr input of the water heater does not exceed the recommended input of the
VP-2F (60,000) or VP-3F (120,000).
11. A safety inspection of the water heater must be performed before installation of the VP-2F or VP-3F as outlined in
ANSI Z223.1/NFPA #54, Appendix H.
ACTUATION AND SAFETY CONTROLS INSTALLATION
After opening carton, inspect thoroughly for hidden damage. Fan blade should rotate freely. If any damage is found notify freight
carrier and your distributor immediately and file a concealed damage claim. Remove the carton labeled “Actuation and Safety
Controls.”
GAS PRESSURE SWITCH INSTALLATION
The gas pressure switch is mounted on the casing of the water heater adjacent to the heater's thermostat/gas control valve. It should
be mounted close enough so that the supplied 1/4" tubing will reach from the gas pressure switch fitting to the thermostat/gas valve
pressure tap port. The two provided screws are self-tapping and drilling. The screws do not require the use of a drill and their 1/2"
length assures that the inner tank will not be penetrated.
1. Mount the gas pressure switch by securing it to the heater casing with a screw in each of the two mounting holes.
IMPORTANT: Mount gas pressure switch so that diaphragm is in a VERTICAL position, (See Diagram A).
2. Install the supplied 1/8"-NPT pipe plug to the 90 o port of the supplied 1/8-NPT black pipe tee, (See Diagram A).
Use thread sealant, do not over tighten.
3. Install the 1/8-NPT black pipe tee to the gas pressure switch, (See Diagram A). Use thread sealant, do not over
tighten. CAUTION: Utilize the hex nut on the gas pressure switch when attaching the black pipe tee.
4. Install the supplied Brass 1/8-NPT male x ¼" compression fitting to the 1/8-NPT black pipe tee, (See Diagram A).
Use thread sealant, do not over tighten.
5. Remove the PRESSURE TAP plug from the underside of the thermostat/gas control valve and install the supplied Brass
1/8-NPT male x ¼" compression fitting, (See Diagram A). Use thread sealant, do not over tighten.
IMPORTANT: DO NOT alter the heater's PILOT GAS LINE, (See Diagram A).
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 is not pinched closed.