Gas Supply, Condensate Drain And Piping; Gas Connection - Rheem H2AC Installation Instructions Manual

FIGURE 9
SUGGESTED GAS PIPING
ROOF OR GROUND LEVEL INSTALLATION
FROM GAS
METER
MANUAL GAS
SHUT-OFF
VALVE
*
Factory supplied grommet must be utilized.
III. GAS SUPPLY, CONDENSATE DRAIN AND
III. PIPING
A. GAS CONNECTION
IMPORTANT: Connect this unit only to gas supplied by a commercial utility.
1. Install gas piping in accordance with local codes and regulations of the local utili-
ty company. In the absence of local codes, the installation must conform to the
specifications of the National Fuel Gas Code, ANSI Z223.1 - latest edition.
NOTE: The use of flexible gas connectors is not permitted.
2. Connect the gas line to the gas valve supplied with unit. Routing can be through
the gas pipe opening shown in Figure 9 or through the base as shown in Figure
13.
3. Size the gas line to the furnace adequate enough to prevent undue pressure
drop. Do not use less than 1/2" pipes.
4. Install a drip leg or sediment trap in the gas supply line as close to the unit as
possible.
5. Install an outside ground joint union to connect the gas supply to the control
assembly at the burner tray.
6. Gas valves have been factory installed. Install a manual gas valve where local
codes specify a shut-off valve outside the unit casing. (See Figure 9 and Figure
13.)
7. Make sure piping is tight. A pipe compound resistant to the action of lique-
fied petroleum gases must be used at all threaded pipe connections.
8. IMPORTANT: any additions, changes or conversions required for the furnace to
satisfactorily meet the application should be made by a qualified installer, service
agency or the gas supplier, using factory-specified or approved parts. In the com-
monwealth of Massachusetts, installation must be performed by a licensed
plumber or gas fitter for appropriate fuel.
TABLE 1
GAS PIPE CAPACITY TABLE (CU. FT./HR. NATURAL GAS @ 0.30 IWC
[INCHES OF WATER COLUMN] PRESSURE DROP)
Nominal
Iron Pipe
Inches
IMPORTANT: Disconnect the furnace and its individual shutoff valve from the gas
supply piping during any pressure testing of that system at test pressures in excess
of 1/2 pound per square inch gauge or isolate the system from the gas supply piping
system by closing its individual manual shutoff valve during any pressure testing of
this gas supply system at pressures equal to or less than 1/2 PSIG.
UNIT GAS SUPPLY
CONNECTION
*
Equivalent Length of Pipe, Feet
Size,
10 20 30
1 / 132 92 73
2
3 / 278 190 152
4
1 520 350 285
1 1 / 1,050 730 590
4
1 / 1,600 1,100 890
1
2
40 50 60 70 80
63 56 50 46 43
130 115 105 96 90
245 215 195 180 170
500 440 400 370 350
760 670 610 560 530
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