12
Final start-up procedures
Logano G
C
124 II – 6 720 804 440 (2012/11)
16
11.1.2 Turning on heating system
The boiler is fully functional with the factory-installed boiler temperature
controller and field installed and connected vent damper.
▶ Switch on power to the heating system, continue to chapter 12.
▶ Verify that the thermostat (optional) signals a heat demand to the
boiler (set temperature dial at least 10°F above ambient).
Fig. 21 ON/OFF switch
[1]
Emergency shutoff switch
12
Final start-up procedures
Verifying the ignition spark
▶ Look through the sight glass at the igniter and verify that a spark is
visible.
▶ Should no spark be visible continue to troubleshooting in
chapter 15.8, page 27.
Fig. 22 GC124 II
[1]
Sight glass
▶ Turn ON/OFF knob (
figure 23) counterclockwise to the ON
position.
▶ The ignition flame will appear and ignite the main burner. If the main
burner does not ignite, close the gas shut-off. Disconnect heating
system from the power source and inform your customer service
technician or gas company.
Fig. 23 Gas valve
[1]
ON/OFF knob (shown in ON position)
Checking gas supply pressure
▶
C
heck the gas supply pressure while the boiler is operating. The
connection pressure for natural gas must be between 4.7" and 10.5"
W.
C
. For propane gas (LP) it must be between 11" and 13" W.
C
. If the
gas pressure is in the correct range, record the measured value in the
start-up protocol, then continue with the next step. If the supply
pressure does not meet the above criteria, close gas line and contact
the gas company.
Checking orifice pressure
▶
C
ompare the orifice pressure with the values in table 10
(
page 17). If it differs by more than 0.2" W.
C
., adjust accordingly.
To set the orifice pressure, the protective screw on the gas valve must
be removed (
figure 24, page 17). Turn the adjustment screw
clockwise to increase the pressure, and counterclockwise to reduce
the pressure. This setting must be adjusted while the boiler is
operating.
1
6 720 804 440-21.1T
1
6 720 804 440-22.1T
WARNING:
Risk to life from fire or explosion.
▶ Never use excessive force on the ON/OFF knob
(
figure 23).
▶ Turn ON/OFF knob only by hand.
▶ Never use tools to turn knob.
▶ If you are unable to turn the knob by hand, do not try
to repair it.
▶
C
all Buderus technical service for assistance.
1
6 720 804 440-23.1T
Содержание Logano GC 124 II
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