| Left Side Piping |
| MANUAL |
| (Standard) |
| |
| AUTOMATIC | MAIN SHUT−OFF | |
|
| ||
MANUAL |
| VALVE | |
| GAS VALVE | ||
MAIN SHUT−OFF |
| (With 1/8 in. NPT | |
AUTOMATIC |
| ||
VALVE |
| Plugged Tap | |
(With 1/8 in. NPT | GAS VALVE |
| Shown) |
Plugged Tap Shown) |
|
| GROUND |
|
|
| JOINT |
|
|
| UNION |
GROUND |
|
|
|
JOINT |
|
|
|
UNION |
|
| DRIP LEG |
|
|
|
| FIELD | Right Side Piping |
| (Alternate) | |
| PROVIDED | |
DRIP LEG | AND INSTALLED |
|
NOTE − BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
FIGURE 25
Horizontal Applications
Possible Gas Piping Configurations
| MANUAL |
|
| MAIN SHUT−OFF |
|
| VALVE |
|
MANUAL |
| Horizontal Application |
MAIN SHUT−OFF |
| |
| Left−Side Air Discharge | |
VALVE | GROUND | |
| JOINT |
|
| UNION |
|
GROUND |
|
|
JOINT | DRIP LEG |
|
UNION |
| |
|
| |
DRIP LEG |
|
|
|
| MANUAL | |
|
| MAIN SHUT−OFF | |
|
| VALVE | |
| FIELD |
| |
| PROVIDED | GROUND | |
| AND | ||
| JOINT | ||
| INSTALLED | ||
| UNION | ||
|
| ||
Horizontal Application | NOTE − BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET | DRIP LEG | |
Right−Side Air Discharge | |||
| |||
|
|
FIGURE 26
Leak Check
After gas piping is completed, carefully check all piping connections (factory− and field−installed) for gas leaks. Use a leak detecting solution or other preferred means.
NOTE − If emergency shutoff is necessary, shut off the main manual gas valve and disconnect the main power to the furnace. The installer should properly label these devices.
CAUTION
supply system the during any pressure testing of the gas supply system at pressures less than or equal to 1/2 psig (3.48 kPa, 14 inches w.c.).
IMPORTANT
When testing pressure of gas lines, gas valve must be disconnected and isolated. See figure 27. Gas valves can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa, 14 inches w.c.).
Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly af- ter leak test has been completed. Do not use matches, candles, flame or other sources of ignition to check for gas leaks.
The furnace must be isolated by closing its individual manual
MANUAL MAIN | ISOLATE | |
SHUT−OFF VALVE | ||
GAS VALVE | ||
WILL NOT HOLD | ||
FURNACE | ||
NORMAL TEST | ||
| ||
PRESSURE |
| |
1/8 NPT PLUG |
|
CAP
FIGURE 27
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