Main Gas Valve - Operation - PEERLESS Pinnacle PI-399 Installation And Operation Manual

g. Turn off the boiler and gas shutoff valve
h. Remove the manometer tube from the pressure
tap fitting and turn the screw to close the internal
valve.
i. Turn on the gas shutoff valve and boiler service
switch.
4. All gas piping must be leak tested prior to placing the
boiler in operation.
a. If the leak test pressure requirement is higher
than the maximum intake pressure noted in
Table 4.4, the boiler must be isolated from the
gas supply piping system.
b. If the gas valve is exposed to pressures exceeding
13.5" of water, the gas valve must be replaced.
5. Install the boiler such that the gas ignition system
components are protected from water (dripping,
spraying, rain, etc) during operation and service
(circulator replacement, condensate trap cleanout,
and control replacement, etc).
Table 4.4: Maximum and Minimum Fuel Pressure
Fuel Pressure (inches of water)
Gas
Type
Minimum
Natural
LP
WARNING
Do not adjust the throttle screw without monitoring
the carbon dioxide (CO ² ) and carbon monoxide (CO)
in the vent pipe. Vent CO emissions above 400 ppm
are in excess of most safety standards.
Maximum
3.5 13.5
3.5 13.5
E. MAIN GAS VALVE - OPERATION
1. Figure 4.2 shows an illustration of the gas valve/venturi
assembly for the Pinnacle PI-399.
a. The throttle screw on the valve should not be
adjusted without a means to measure carbon
monoxide (CO) and carbon dioxide (CO ² )
emissions.
b. Turning the throttle screw clockwise will decrease
the gas flow (decreasing CO ² ) and turning it
counterclockwise will increase the gas flow
(increasing CO ² ).
c. The recommended CO ² settings are given in
Table 4.5. In no case should the boiler be
allowed to operate with CO emissions in excess
of 150 ppm.
2. Refer to Section 5, Venting for information on
obtaining vent samples from this boiler.
Table 4.5: Recommended Vent CO ² Settings
Firing
Gas Type Rate
Low 8-1/2% to 9-1/2%
Natural
High 8-1/2% to 9-1/2%
Low 9-1/2% to 10-1/2%
LP
High 9-1/2% to 10-1/2%
GAS PIPING
Vent CO ² Vent CO
< 50 ppm
< 100 ppm
< 50 ppm
< 100 ppm
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