18 COZY TOP VENT GRAVITY GAS WALL HEATER
FIGURE 15 – PROPER PIPING PRACTICE
PROPER PIPE
THREADING
INCORRECT
THREADING
2 THREADS EXPOSED
SEALANT THIN
ENOUGH TO SHOW
THREADS
OVER-THREADED
SEALANT
TOO THICK
SEALANT
PAST TIP
DAMAGED
THREADS
INSTALLING YOUR FURNACE
GAS CONNECTION
If the installation is for propane gas, have the propane installer use
a two stage regulator and make all the connections from the storage
tank.
Use two pipe wrenches when making the connection to the valve to
prevent turning and/or damage to the valve.
Connections between the manual shutoff valve and burner control
assembly can be made with an A.G.A./C.G.A. design certified flexible
connector if allowed by local codes. Drip leg and ground joint unions
are still required.
Tighten all joints securely.
Test all piping for leaks. When checking gas piping to the furnace
with gas pressure less than 1/2 PSI, shut off manual gas valve to the
furnace. If gas piping is to be checked with the pressure at or above
1/2 PSI, the furnace and manual shutoff valve must be disconnected
during testing. (SEE WARNING). Apply soap solution (or a liquid
detergent) to each joint. Bubbles forming indicate a leak. Correct
even the slightest leak at once.
WARNING: Danger of property damage, bodily injury
or death. Never use a match or open flame to test for
leaks. Never exceed specified pressures for testing.
Higher pressures may damage the gas valve and
cause over-firing which may result in component(s)
failure. Never attempt start-up of unit before thoroughly
ventilating the area and smelling near the floor for
gas odor.
MANUAL SHUT-OFF VALVE
1/8" NPT
PLUGGED
HOLE FOR
TEST
GAUGE
PIPED GAS SUPPLY
CAUTION: Shut off the main gas supply before removing the end cap to prevent gas from
filling the work area. Test for gas leakage when installation is complete.
CAUTION: All bends in metal tubing must be smooth.
HORIZONTAL
MANUAL SHUT-OFF VALVE
TEE
FITTING
HORIZONTAL
DROP
GROUND JOINT UNION
GAS
VALVE
GAS
VALVE
GAS
VALVE
PIPED GAS SUPPLY
TUBING GAS SUPPLY
2
1
2
CAP
2
CAP
2
CAP
1
3" (76.2 MM) MINIMUM
3" (76.2 MM)
MINIMUM
3" (76.2 MM) MINIMUM
MANUAL
SHUT-OFF VALVE
NIPPLE
NIPPLE
TEE
FITTING
NIPPLE
RISER
RISER
DROP
GROUND JOINT
UNION
GROUND JOINT UNION
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