Keston Thermomatic RSM20/FB, Инструкция по установке и обслуживанию, Страница: 6 / 46

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Red Light Central Heating Switch Temp. Press. Guage
Boiler Control Green Light Fuse On/Off Switch Overheat Switch
2.1 ON-OFF MAIN SWITCH
Allows the appliance to be manually switched on and
off.
2.2 CENTRAL HEATING SWITCH (SUMMER-
WINTER)
Allows the central heating and domestic hot water
supply to be switched on. or domestic hot water only
to
be switched on.
2.3 BOILER CONTROL THERMOSTAT
Controls the temperature of the water fed to the
central healing system. The temperature can be man-
ually adjusted between approximately 50" - 90*C ±
2°C.
2.4 OVERHEAT SWITCH
A boiler overheat switch will operate if the boiler
thermostat exceeds 90*C ± 3%. After determining the
season (of the boiler overheat thermostat operating,
the thermostat can be manually re-set. Note: thermo-
stat control cannot be re-set until boiler temperature
falls below 80"C.
2.5 PRESSURE AND TEMPERATURE GAUGE
A combined boiler pressure and temperature gauge
indicates the pressure and temperature of the water in
the boiler. As a guide the pressure of water in the
boiler, with a pressurised system, can be set at 1 bar
when the water is cold.
2.6 BIMETALLIC PRIORITY THERMOSTAT
A bimetallic priority thermostat is fitted al the connec-
tion of the domestic cold water inlet to the boiler.
When a hot lap is opened, the bimetallic priority
thermostat is operated by the flow of cold water into
the boiler.
If the central heating switch (summer/winter switch)
is in the Winter position (i.e. central heating ON) the
bimetallic priority thermostat turns off the central
healing circulating pump.
When the domestic hoi water demand is satisfied the
bimetallic priority thermostat allows the pump to
restart.
When only a small domestic hot water flow is drawn
the bimetallic priority thermostat does not intervene.
2.7 ANTICONDENSING THERMOSTAT
This thermostat prevents the central heating emula-
ting pump from operating until the boiler water
temperature reaches 60"C
3 GENERAL REQUIREMENTS
3.1 RELATED DOCUMENTS
It is the law that gas appliances be fitted by a
competent person. Failure to do so could lead to
prosecution. It is in your own interest, and that of
safety, to ensure compliance with the law.
Installation shall be in accordance with the following
documents:
- Gas Safety (Installation and Use) Regulation 1984
- Building Regulations
- Building Standards (Scotland) Consolidation
- Current IEE Wiring Regulations
- By-Laws of the Local Water Authority
- BS.6798: Boilers of rated input not exceeding 60KW
- BS5449: Forced circulation hot water systems
- BS.5546: Gas hot water supplies
- BS.5440: Part 1: Flues
- BS.5440:
Part 2: Ventilation
- BS.6891: Gas supply
-
Where the appliance is installed in a timber framed
building, reference should be made to the British Gas
Publication reference DM2.
3.2 GAS SUPPLY
See fig.3.1 for connection
Fig. 3.1
A gas meter can only be connected by local gas
legions or by a local gas region contractor. An existing
meter should be checked, preferably by the gas
region, to ensure the meter is adequate to deal with
the rate of gas supply.
Installation of pipes should be in accordance with
BS.6891.
Pipework from the meter to the appliance must be of
adequate size.
Do not use pipes of a smaller size than the appliance
gas inlet connection.
The complete installation must be tested for sound-
ness and purged as described in the above code
2 OPERATING SEQUENCE (Fig.2.1}