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8
Gas connections
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.
Armor water heaters are typically shipped
WARNING
⚠
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 and making a
gas valve adjustment (see pages 12 thru
13). 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.
Use two wrenches when tightening gas
WARNING
⚠
piping at water heater (FIG. 8-2), using
one wrench to prevent the water heater
gas line connection from turning. Failure
to support the water heater gas connection
pipe to prevent it from turning could
damage gas line components.
Figure 8-2 Inlet Pipe with Backup Wrench
DIR #2000589291 00
Maximum inlet gas pressure must not
NOTICE
exceed the value specified. Minimum
value listed is for the purposes of input
adjustment.
48
Natural gas:
Pipe sizing for natural gas
1. Refer to Table 8A for pipe length and diameter. Based on
Natural gas supply pressure requirements
1. Pressure required at the gas valve inlet pressure port:
2. Install 100% lockup gas pressure regulator in supply line if
Propane gas:
⚠
Pipe sizing for propane gas
1. Contact gas supplier to size pipes, tanks, and 100% lockup
USE BACK-UP
Propane supply pressure requirements
WRENCH TO PREVENT
PIPE FROM ROTATING
1. Adjust propane supply regulator provided by the gas
2. Pressure required at gas valve inlet pressure port:
⚠
Installation & Operation Manual
rated water heater input (divide by 1,000 to obtain cubic feet
per hour).
a.
Table 8A is only for natural gas with specific gravity
0.60 inches, with a pressure drop through the gas
piping of 0.30 inches w.c.
b.
For additional gas pipe sizing information, refer to
ANSI Z223.1 (or B149.1 for Canadian installations).
• 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).
inlet pressure can exceed 14 inches w.c. at any time. Adjust
lockup regulator for 14 inches w.c. maximum.
Armor water heaters are typically shipped
WARNING
ready to fire on natural gas. Check 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 a LP
venturi and making a gas valve adjustment
(see pages 12 thru 13). In order to operate
on LP gas, an orifice MUST BE installed
(for 500 Models) or a gas valve adjustment
MUST BE made. Failure to comply could
result in severe personal injury, death, or
substantial property damage.
gas pressure regulator.
supplier for 14 inches w.c. maximum pressure.
• 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).
Ensure that the high gas pressure regulator
WARNING
is at least 10 feet upstream of the appliance.
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