Starting Up The Gc124 Ii And Gc124 Sp Boilers - Buderus Logano GC124 II/SP Installation And Service Instructions Manual

Placing the heating system in operation

11.1 Starting up the GC124 II and GC124 SP boilers

1. STOP! First perform a leak test as described on
page 27 of this manual.
2. First read the safety instructions on
this manual.
11.1.1 Prepare pressure measurement
3. Remove the screw plug for the gas pressure
measurement port on the gas valve. Install pressure
measuring nipple and attach a pressure gauge to
measure the gas pressure.
4. Remove the screw plug for the orifice pressure
measurement port on the gas valve. Install pressure
measuring nipple and attach a pressure gauge to
measure the orifice pressure.
5. Open gas shut-off.
11.1.2 Turning on heating system
The boiler is fully functional with the factory-installed
aquastat and field installed and connected vent damper.
6. Switch on power to the heating system, GC124 II
continue to Chapter 12, page 30 (GC124 II),
GC124 SP continue to
7. Verify that the thermostat (optional) signals a heat
demand to the boiler (set temperature dial at least
10°F above ambient).
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Gas Boiler Logano GC124 II/SP • Issue 07/2006
page 28 of
Chapter 13, page 35.
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1
4
3
Fig. 20 Gas valve (GC124 II left, GC124 SP right)
1 ON/OFF knob (shown in ON position)
2 Screw plug for gas pressure measurement port
3 Screw plug for orifice measurement port
4 Ignition gas line connection
1
Fig. 21 ON/OFF switch
1 Emergency shutoff switch
11
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1
4
3
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