Page 30
Chapter 2,
SteamCraft 10 Service Manual
Models 24-CGA-10, 24-CGP-10, 24-CEA-10, 24-CEP-10
Figure 2-15. Automatic Gas Valve
Bleed Air from the Gas Supply Lines
After the gas supply line is assembled, connected to the SteamCraft 10, and
pressure tested satisfactorily; bleed the air from the line. The SteamCraft 10
gas control module uses an intermittent gas pilot. The module sparks the pilot
igniter and sends gas to the pilot simultaneously. If the pilot flame sensor does
not detect pilot ignition within a few seconds, the control module stops both
pilot spark and gas flow. Bleeding the entire supply gas line through this type of
gas control system may take quite a long time. To save time, bleed the air
through a loosened fitting. Bleed the gas supply line by the following
procedure.
1. Turn off electrical power to the SteamCraft 10 at both the panel ON/OFF
switch (Figure 2-16), and the main disconnect switch (Figure 2-8, Rec-
ommended Electrical Layout).
2. Remove th
e
left side access panel by removing the three mounting screws.
Save the screws.
• Verify that th
e
automatic gas valve wiring connections are clean and tight.
• Verify that the manual ON/OFF valve of th
e
automatic gas valve is in the
ON position (Figure 2-15).
3. If the main gas valve is too far from the unit for one man to both bleed the
line and operate the valve, arrange for an assistant to operate the valve.
4. Use the union fitting located just ahead of the gas valve as the bleed point.
This will minimize the amount of air remaining between th
e
bleed point and
the automatic gas valve after bleeding the line. If it is not possible or
convenient to use this union fitting, select another fitting close to the
SteamCraft 10 automatic gas valve. To minimize the amount of air