Placing the heating system in operation
11
29
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
11.1 Starting up the GC124 II and GC124 SP boilers
1.
STOP! First perform a leak test as described on
Î
page 27 of this manual.
2.
First read the safety instructions on
Î
page 28 of
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
Î
Chapter 12, page 30 (GC124 II),
GC124 SP continue to
Î
Chapter 13, page 35.
7.
Verify that the thermostat (optional) signals a heat
demand to the boiler (set temperature dial at least
10°F above ambient).
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
2
3
4
1
2
3
4
Fig. 21
ON/OFF switch
1
Emergency shutoff switch
1