7 Gas connections (continued)
Do not check for gas leaks with an open WARNING flame – use the bubble test. Failure to use
the bubble test or check for gas leaks can cause severe personal injury, death, or substantial property damage.
6. Use pipe sealing compound compatible with propane gases. Apply sparingly only to male threads of the pipe joints so that pipe dope does not block gas flow.
Failure to apply pipe sealing compound as WARNING detailed in this manual can result in severe
personal injury, death, or substantial property damage.
Installation & Operation Manual
Natural gas:
Pipe sizing for natural gas
1.Refer to Table 7A for pipe length and diameter. Based on rated water heater input (divide by 1,000 to obtain cubic feet per hour).
a.Table 7A is only for natural gas with specific gravity 0.60 inches, with a pressure drop through the gas piping of 0.50 inches w.c.
b.For additional gas pipe sizing information, refer to ANSI Z223.1 (or B149.1 for Canadian installations).
Natural gas supply pressure requirements
WARNING
Armor water heaters are typically shipped ready to fire on natural gas. Check the water heater rating plate to determine which fuel the water heater is set for. If set to natural gas, it may be converted to LP by installing an orifice or by making a gas valve adjustment (see pages 13 thru 15). In order to operate on LP gas, an orifice MUST BE installed or a gas valve adjustment MUST BE made. Failure to comply could result in severe personal injury, death, or substantial property damage.
1.Pressure required at the gas valve inlet pressure port:
•Maximum 14 inches w.c. with no flow (lockup) or with water heater on.
•Minimum 4 inches w.c. with gas flowing (verify during water heater startup).
2.Install 100% lockup gas pressure regulator in supply line if inlet pressure can exceed 14 inches w.c. at any time. Adjust lockup regulator for 14 inches w.c. maximum.
Propane gas:
WARNING Armor water heaters are typically shipped ready to fire on natural gas. Check water
WARNING
Use two wrenches when tightening gas piping at water heater (FIG.
heater rating plate to determine which fuel the water heater is set for. If set to natural gas, it may be converted to LP by installing an orifice or by making a gas valve adjustment (see pages 13 thru 15). In order to operate on LP gas, an orifice MUST BE installed or a gas valve adjustment MUST BE made. Failure to comply could result in
Figure 7-5 Inlet Pipe with Backup Wrench
NOTICE | Maximum inlet gas pressure must not |
exceed the value specified. Minimum | |
| value listed is for the purposes of input |
| adjustment. |
severe personal injury, death, or substantial property damage.
Pipe sizing for propane gas
1.Contact gas supplier to size pipes, tanks, and 100% lockup gas pressure regulator.
Propane supply pressure requirements
1.Adjust propane supply regulator provided by the gas supplier for 14 inches w.c. maximum pressure.
2.Pressure required at gas valve inlet pressure port:
•Maximum 14 inches w.c. with no flow (lockup) or with water heater on.
•Minimum 8 inches w.c. with gas flowing (verify during water heater startup).
WARNING Ensure that the high gas pressure regulator is at least 6 - 10 feet upstream of the
appliance.
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