AquaStar 170 VP manual Connecting the water lines, Connecting the pressure relief valve

NOTE: The regulator supplied with the heater is an appliance level regulator de- signed for low inlet pressure (less than 1/2 LB or 15"W.C.). DO NOT connect to an un- regulated or high pressure propane line.

When your connections are made, check for gas leaks at all joints (not just ones you made). Apply some soapy water to all gas fittings and gas valve. Soap bubbles are a sign of a leak. NOTE: Do not apply soap solution to pilot fil- ter screen or pilot orifice area. If you have a leak, shut off the gas. After verifying that re- quired gaskets are in place, tighten appropri- ate fittings to stop leak. Turn the gas on and check again with a soapy solution. Never test for gas leaks using a match or flame.

3. Connecting the water lines

Although water piping throughout your struc- ture may be other than copper, copper piping should be used for at least three feet before and after the heater (follow local codes if more stringent). Keep water inlet pipe to at least 3/4 inch diameter to allow the full flow capacity. Remember that piping and water pressure must allow sufficient flow to activate the heater when drawing hot water from the top floor. If the hot and cold connections are reversed, the heater will not function. Be certain there are no loose particles or dirt in the piping. Blow out or flush water lines before connecting them to the AquaStar 170 VP water heater.

4. Connecting the pressure relief valve

A temperature and pressure relief valve must be installed on the hot water line, close to the heater. No valve is to be placed between the relief valve and the heater. Installation shall be made in such a manner that the discharge from the temperature and pressure relief valve will be conducted to a suitable place for dis- posal when relief occurs. No reducing coupling or other restriction may be installed in the dis- charge line. The discharge line must be in- stalled such that it allows complete drainage of both the valve and the line.

The location of the relief valve must be readily accessible for servicing or replacement. To ac- commodate the pressure relief valve, a suitable fitting connected to an extension of a "T" fitting can be sweated to the line. Make the T-fitting extension long enough to ensure that the tem- perature probe does not interfere with the wa- ter flow. The relief pressure of the valve must not exceed 150 psig. The relief temperature of the valve must not exceed 210ºF and the dis- charge capacity must be at least 165,000 Btu per hour.

5.Vent pipe connection. WARNING: Do not reduce the vent pipe size.

This appliance must be vented to the outside following all local ordinances and specifications for installing a gas appliance vent or chimney. The venting system must be constructed so as to develop a positive flow adequate to remove flue gasses to the outdoors under all operating conditions.

The appliance must be located as close as prac- ticable to a chimney or vent. The vent pipe sections must be fastened with sheet metal screws. Keep in mind the minimum clearance from the top of your heater. Remember also that single wall vent pipe connectors require a

6inch clearance from combustibles. National Fuel Gas Code specifies double wall - Type "B" - vent pipe be used in cold climates and for gas vents running through attics. We consider double wall vent pipe preferable in all circum- stances. The vent connector should have as much vertical rise as possible (minimum 12") before any horizontal run. Any vent section greater than 45 degrees from vertical is con- sidered horizontal. Horizontal sections of vent connectors must slope upwards at least 1/4 inch for every foot of its horizontal length. Keep the horizontal section short and avoid too many elbows.

Note: Although the AquaStar has the same vent- ing requirements as other Category I gas appli- ances, certain features and specific use charac- teristics make it more important to have a venting system which exceeds minimum standards. AquaStar thermostats modulate burner output.

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