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HearthStone Quality Home Heating Products Inc Tucson Model #8700
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NOTE: If an optional blower is to be installed now or in the future, make sure the gas line is
installed as close to the floor as possible.
Figure 20: Gas Control Valve
GAS SUPPLY &
CONNECTIONS
› NOTICE: A qualified technician must
connect the heater to the gas supply
and leak test the unit before it is
approved for use. Consult all codes.
› WARNING: The unit must be installed
and connected in accordance with local
codes, or in the absence of local codes,
with the most current edition of the
National Fuel Gas Code ANSI Z223.1
(NFPA 54) or CAN/CGA B149
Installation Code.
GAS CONNECTIONS
The gas supply line connection is made to
the Tucson’s gas control valve just inside
the left front leg of the unit using a 3/8”
male NPT fitting. The supply line should be
½” diameter or appropriately sized to
provide a sufficient gas supply to meet the
maximum demand of the unit without undue
loss of pressure. We recommend a flexible
line to avoid undue mechanical load on the
valve and to ease thread alignment, but refer
to local codes.
› CAUTION: Check Gas Type!
GAS SUPPLY
This appliance and its individual shutoff
valve must be disconnected from the gas
supply piping system during any pressure
testing of that system at test pressures in
excess of ½ psig. The Tucson must be
isolated from the gas supply piping system
by closing its individual manual shutoff
valve during any pressure testing of the gas
supply piping system at test pressures equal
to or greater than ½ psig.
GAS PRESSURE ADJUSTMENT
NOTE: A QUALIFIED TECHNICIAN
MUST PERFORM THIS PROCEDURE!