65
Gas piping to the boiler must be sized to deliver adequate gas for the boiler to fire at the nameplate input at an inlet
pressure between the minimum and maximum values shown in Table 8.2. When sizing, also consider other existing
and expected future gas utilization equipment (i.e. water heater, cooking equipment). For more information on gas line
sizing, consult the utility or the
National Fuel Gas Code,
NFPA 54/ANSI Z223.1, and/or CAN/CSA B149.1
Natural
Gas and Propane Installation Code.
Figure 8.1 shows typical gas piping connection to the boiler. A sediment trap must be installed upstream of all gas
controls. Install the factory provided manual shut-off valve outside the jacket with a ground joint union as shown.
All above ground gas piping upstream from manual shut-off valve must be electrically continuous and bonded to a
grounding electrode. Refer to
National Electrical Code,
NFPA 70.
The boiler and its gas connection must be leak tested before placing the boiler in operation. When doing this, the boiler
and its individual shut-off must be disconnected from the rest of the system during any pressure testing of that system
at pressures in excess of 1/2 psi (3.5kPa). When pressure testing the gas system at pressures of 1/2 psi (3.5kPa) or
less, isolate the boiler from the gas supply system by closing its individual manual shut-off valve. Locate leaks using
approved combustible gas non-corrosive leak detector solution.
VIII. Gas Piping
WARNING
Explosion Hazard. Failure to properly pipe gas supply to boiler may result in improper operation or leaks of
flammable gas.
Gas supply to boiler and system must be absolutely shut off prior to installing or servicing boiler gas piping.
Always assure gas piping is absolutely leak free and of the proper size and type for the connected
load.
Use a thread compound compatible with liquefied petroleum gas. Failure to use proper thread
compounds on all gas connectors may result in leaks of flammable gas.
If inlet pressure is above 1/2 psig (3.4 kPa) an additional gas pressure regulator is required. Consult
gas supplier.
Size corrugated stainless steel tubing (CSST) to ensure proper capacity and minimize flow restrictions.
DANGER
Explosion Hazard. Do not use matches, candles, open flames or other ignition source to check for leaks.
WARNING
If gas pressure in the building is above ½ psig (3.4 kPa), an additional gas pressure regulator is required.
Using one additional regulator for multiple gas appliances may result in unsafe boiler operation. The
additional regulator must be able to properly regulate gas pressure at the input of the smallest appliance.
If the regulator can not do this, two or more additional regulators are required. Consult regulator
manufacturer and/or local gas supplier for instructions and equipment ratings.
Summary of Contents for Raptor RPTR085
Page 1: ...1...
Page 13: ...13 Figure 5 1 Wall Layout Mounting Hole Location V Mounting The Boiler continued...
Page 87: ...87 Figure 10 5 Internal Wiring Ladder Diagram X Wiring continued...
Page 88: ...88 X Wiring continued...
Page 97: ...97 Operating Instructions XI Start Up and Checkout continued...
Page 142: ...142 XV Repair Parts continued 3A 3B 3C 3D 3F 3E 3G 3H 3O 3P 3Q 3R 3J 3K 3I 3M 3N 3L All Models...
Page 148: ...148 XV Repair Parts continued 6D 6B 6A 6E 6I 6G 6L 6N 6H 6C 6K 6M 6C 6C 6J 6J 6F All Models...
Page 172: ...172...
