Gaz Industrie BTwin BTH25, Technical Instructions

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10 Programming
The clock index shall be placed so as to activate the start up about 30 minutes before the
premises are occupied. The time lapse should be modified according to the inertia of the
building and to the external temperature.
In the case of a very low external temperature, it is advised not to stop the heating during
periods of inoccupation, but instead to simply reduce the temperature.
It is advised not to stop the heating during short interruptions in the use of premises.
11 Setting Up
- After resistance test for mechanical seals and cleaning of gas line:
- Clean the gas network.
- Check that electrical supply is correct.
- Check presence and correct state of the flue installation.
FUNCTIONNING CYCLE :
Appliances are regulated in factory and do not need any additional adjustment on site.
- As soon as the electrical supply is turned on, beginning of the pre-purge sequence of about
15 seconds (yellow control lamps light).
- Control of the negative pressure in the tube through differential pressure switch.
- When the negative pressure is sufficient, the ignition spark starts and the electromagnetic
gas valve opens.
- When the sensor detects the flame, the ignition spark stops and the appliance functions as
long as it is supplied in gas and in electricity.
. If for whatever reason the flame is no longer detected, the electro valve closes and the unit
goes to lockout.
- Then the appliance attempts another ignition and a second working cycle starts.
- After 3 attempts of ignition, the unit goes to lockout.
- In the event of the 3 ignition attempts without success, the unit again goes to lockout. The
ignition sequence can only start again if the electric supply is cut and reconnected some
seconds later.
. While operating, only the yellow control light stays on.
- In case of technical problem, refer to paragraph 14 « Faults - possible causes ».
12 Maintenance
We recommend to check the appliance and the installation at least every year.
The checking must be made by skilled personnal. A maintenance contract is advised.
CAREFUL : refer to the rules in force.
CAREFUL : INSULATE GAS AND ELECTRICITY BEFORE ANY MAINTENANCE WORKS.
Check that access conditions and minimum distances are respected.