geminox THR Series - COMMISSIONING; Initial Commissioning Steps; Operating Pressure Check

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Before commissioning, the installer must :
- Check that the boiler is suitable for the gas used.
- Perform a leak check on the gas system.
- Carefully bleed the air from the gas line. If the
system is new, bleeding chases the air out of the
lines so that the boiler has a suitable fuel. Air in
the gas prevents ignition of the burner and with
trip of the safety device by the flame monitor unit.
This remark applies to a new system using natu-
ral gas and LPG. In the second case, the storage
tank should also be efficiently bled before com-
missioning.
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- Check the flue gas outlet for leaks and free pas-
sage of the combustion products.
- Check that the system is filled with water,
P = 1.5 bar, radiators bled, valves open.
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- Check that the electrical connection is correct:
230 V (+10 %, - 15 %), 50 Hz, polarities correct.
- Check that the condensate drain is connected.
- Check that the trap is filled with water.
When commissioning, the installer must check:
- Correct operation of the controller.
- Correct operation of the flame monitor.
- Setting of the burner for CO, CO
2
emissions.
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- Open the hand-operated valve on the gas supply.
- Switch on the main heating switch.
The regulator undergoes a self-test sequence,
displaying codes L, P, C, 6, and 5 in turn. The dis-
play then shows 9, and finally 0.
After a wait lasting a few seconds and if there is a
demand for heating, the boiler then starts an igni-
tion cycle. This demand depends on the boiler
settings (refer to operating details for the different
versions (§ 2 - III - OPERATION)).
If the boiler is currently in an alarm state, press
the manual reset button. (If this alarm persists, re-
fer to the list of fault codes).
- Burner adjustment: this is factory preset for Natu-
ral Gas type H (G20) or Propane (G31) depend-
ing on model. However, the following checks
should be carried out when commissioning (the
burner should be on; see burner port description
and comments, fig. 11 § 5 - III - OPERATION).
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3
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= Natural Gas H (G20) - 20 mbar, mains pres-
sure; Propane (G31) 37 mbar,
3
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= Gas pressure controlled by air pressure
3/ = Servo-air pressure (Pa) (burner - gas valve)
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