6
Placing the heating system in operation
Logano G234X – 6 720 811 233 (2017/02)
18
6
Placing the heating system in operation
▶ Complete the commissioning report during the commissioning
procedure (
6.1
Testing the safety valve
The safety valve must open and relieve pressure when the set operating
pressure is exceeded. If the safety valve fails to release excess pressure,
it must be replaced, because otherwise system components may be
damaged by excessive operating pressure.
6.2
Making the heating system ready for operation
The burner/gas valve unit integrated in the boiler have been tested in the
factory as described in detail in ANSI Z 21.13 and CSA 4.9 to ensure
safe operation of the heating system and to test specific performance
features.
1. Set the room thermostats to the lowest setting.
2. Inspect flue gas and combustion air piping and the openings for
combustion air supply and ventilation.
3. Fill heating system with water and bleed the complete system,
including the radiators.
Removing the front wall of the boiler
4. Unscrew the locking screws [2] at the bottom of the front cover [1],
lift front cover up, pull forward and remove to the front.
Fig. 18 Removing the front wall of the boiler
[1]
Front wall of boiler
[2]
Locking screws
Carrying out leak test
5. Open the gas shutoff valve.
6. Check the gas supply line to the gas valve for leaks with soap solution.
If no leaks are found, continue with step 8.
7. If leaks are detected, close the gas shutoff valve, seal the leaks, and
repeat step 6.
8. Close the gas shutoff valve. Remove the screw plug from the gas
supply pressure test point [2] on the gas valve in order to measure
the gas supply pressure. Install pressure test port and attach a
pressure gauge.
9. To measure the orifice pressure, remove the screw plug from the
orifice pressure test point [3] on the gas valve. Install pressure test
port and attach a pressure gauge.
Fig. 19 Gas valve
[1]
ON/OFF knob (ON position)
[2]
Screw plug for gas supply pressure test port
[3]
Screw plug for orifice pressure test port
10. Open the gas shutoff valve and measure the gas supply pressure to
the boiler. The supply pressure for natural gas must be between
7"...10.5" W.C. (17.4...26.2 mbar) and between 11"...13" W.C.
for propane gas (27.4...32.4 mbar). If the connection pressure is
not in this range with natural gas, contact your customer service
technician or gas utility company. Close the gas shutoff valve.
11. Follow the startup instructions in Section 6.3.
DANGER:
Risk of fatal injury from electric current when
appliance is opened up!
▶ Before opening the appliance:
Disconnect the heating system from the power
supply completely via the ON/OFF switch or the
appropriate building fuse.
▶ It is not sufficient just to switch off the controller.
▶ Take measures to ensure that the heating system
cannot be accidentally reactivated.
2
1
6 720 806 028-08.1T
NOTICE:
Risk of system damage due to short-circuits!
▶ Cover any hazardous locations prior to locating the
leaks.
▶ Do not spray leak detector onto conduits, plugs or
electrical connection cables or allow it to drip onto
them.
Summary of Contents for G234X/38
Page 34: ...10 Logano G234X 6 720 811 233 2017 02 34 Notes...
Page 35: ...10 Logano G234X 6 720 811 233 2017 02 35 Notes...
Page 36: ......
