X-FIRE 300A-850A, Инструкция по установке и эксплуатации

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48
Preparation
Check Power Supply
With multi-meter at incoming power, check voltage
between:
Hot - Common (≈120 VAC)
Hot - Ground (≈120 VAC)
Common - Ground (< 1 VAC)
Attach Manometers to Measure Pressures
1. Turn off main gas shutoff valve.
2. On the 700A and 850A models, remove plugs “A”
and “B,” and install 1/8” NPT fittings to allow meas-
urement of the gas pressure.
WARNING: If Common - Ground is > 1 VAC,
STOP: Contact electrician to correct ground failure.
Failure to do this may burn out 120V-24V
transformer, or may cause other safety control
damage or failure.
(700A/850A)
GAS
TO BURNER
B
A
TO BURNER
(300A-500A)
GAS
A
B
Fig. 44: Gas Pressure Measurement Locations
3. Attach a 12” scale manometer to the upstream fit-
ting on the gas supply pipe to the heater (Measure
point “A” in Fig. 44, field-supplied on the 700A and
850A).
4. Attach a 12” scale manometer to the downstream
fitting on the gas manifold (Measure point “B” in
Fig. 44, field-supplied on the 700A and 850A).
5. Attach a 12” scale manometer between the Swirler
and Gas valve on the air hose tee (see Fig. 45).
Pull the black cap to connect the manometer.
Check Gas Supply Pressure
1. Slowly turn on main gas shut-off valve.
2. Read the gas supply pressure from the manome-
ter; minimum supply pressure for natural gas is 4.0
in. WC, recommended supply is 7.0 in. WC, mini-
mum supply pressure for propane gas is 4.0 in.
WC, recommended supply is 11.0 in. WC (dynam-
ic readings, full fire input).
3. If the gas pressure is greater than 14.0 in. WC,
turn off the main gas shut-off valve.
WARNING: Do not turn on gas at this time.
NOTE: While attaching manometers, any cap or
bleedle valves removed should be retained for
reinstallation later.
BLACK CAP
BLACK CAP
300A-500A
700A-850A
Fig. 45: Pressure Vent Switch Assemblies