INSTALLATION
Continued
IMPORTANT: Install an equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.
Check your building codes for an special requirements for locating equipment shutoff valve to heater.
Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.
Pressure |
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Regulator |
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| 3/8" NPT | ||
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Regulator |
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| Pipe | ||
Bracket |
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| Nipple | ||
Heater |
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| Ground | ||
Cabinet |
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| Joint | ||
Connection* |
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| Union | |
Tee Joint |
| Equipment | |||
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| Reducer |
| Shutoff | ||
| Bushing to |
| Valve* | ||
Gauge | 1/8" NPT |
| Natural Gas | ||
Plug Tap | Min. | ||||
Meter (7" W.C. | |||||
Test | 1/8" NPT | 3" | From Gas | ||
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| to 10.5" W.C. | ||
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| Tee | Pipe | Cap | Pressure) | |
| Joint | Nipple |
| Propane/LP | |
| Sediment Trap | From External | |||
| Regulator | ||||
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| (11" W.C. to 14" | |
| Refer to connector's | W.C. Pressure) | |||
| instructions |
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| Flexline |
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WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown in Figure 15. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.
IMPORTANT: Hold the pressure regulator with wrench when connecting it to gas piping
and/or fittings. Do not over tighten pipe connection to regulator. The regulator body could be damaged.
CHECKING GAS CONNECTIONS
WARNING:Testallgaspiping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once.
WARNING: Never use an open flame to check for a leak. Applyanoncorrosiveleakdetection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.
| See | |
3/8" NPT/ 1/2" | illustration | |
above for | ||
Flare 90° Elbow | ||
detail | ||
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Connection Using Flexline | ||
Figure 15 - Gas Connection
*An equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional equipment shutoff valve from your dealer.
CAUTION: For propane/LP units, make sure external regulator has been installed between propane/LP supply and heater. SeeguidelinesunderConnecting to Gas Supply, page 11.
Pressure Testing Gas Supply Piping System
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1.Disconnect appliance with its appliance main gas valve (control valve) and equip- ment shutoff valve from gas supply piping. Pressures in excess of 1/2 psig will dam- age heater regulator.
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