6
221469B
COLD WATER
SUPPLY IN
GAS SERVICE
COCK
HOT WATER
OUT
HEATING
FLOW
HEATING
RETURN
2793A
Diagram 3
SAFETY
VALVE
DISCHARGE
DRAIN POINT
SLOT (OPEN)
SLOT (OPEN)
SIT Diagram 4
PIEZO
BUTTON ‘E’
CLOCK/
TIMER
GAS CONTROL
KNOB ‘D’
SWITCH (OFF)
SWITCH (ON)
CENTRAL
HEATING
SELECTOR
SWITCH ‘C’
PRESSURE
GAUGE ‘A’
6639
HONEYWELL
PIEZO
BUTTON ‘E’
CLOCK/
TIMER
GAS CONTROL
KNOB ‘D’
SWITCH (ON)
PRESSURE
GAUGE ‘A’
CENTRAL
HEATING
SELECTOR
SWITCH ‘C’
SWITCH (OFF)
6638
Central Heating Selector Switch
For central heating set switch “C” to “On” as shown in diagram
4, white flash showing. The main burner will light.
When the heating is controlled by a room thermostat and/or a
time switch, switch “C” must be set “On”, the white flash
showing.
If a hot water tap is opened while the boiler is on for heating, the
burner flame will increase in size and priority will be given to hot
water. When the hot water tap is closed, the main burner flames
will decrease in size but will remain alight until the boiler controls
or any heating controls switch it off.
Which ever position switch “C” is in domestic hot water will be
available.
To Turn the Central Heating Off
To turn the heating off for short periods, set switch “C” to “Off”
as shown in diagram 4.
To turn on again set switch “On” so that the white flash shows,
see diagram 4.
To Turn the Boiler Off - Honeywell
To turn the boiler off, isolate the boiler from the electrical supply.
Turn gas control knob “D” clockwise to its stop and release.
Control knob “D” will automatically return to the lighting position.
Follow the full instructions to relight.
To Turn the Boiler Off - SIT
To turn the boiler off, isolate the boiler from the electrical supply.
Turn gas control knob “D” clockwise to '
' and release.
Follow the full instructions to relight.
Domestic Hot Water Temperature
NOTE. The mains water temperature in the winter is lower than
in the summer.
The water temperature can be increased or reduced by adjusting
the flow rate at the hot water draw off.
Maintenance and Servicing
To ensure the continued efficient and safe operation of the
appliance it is recommended that it is checked and serviced as
necessary at regular intervals. The frequency of servicing will
depend upon the particular installation conditions and usage,
but in general once a year should be enough.
If this appliance is installed in a rented property there is a duty
of care imposed on the owner of the property by the current
issue of the Gas Safety (Installation and Use) Regulations,
Section 35.
Servicing/maintenance should be carried out by a competent
person in accordance with the rules in force in the countries of
destination.
To obtain service, please call your installer or Heatcall (Glow-
worm’s own service organisation) using the telephone number
behind the controls access door, see diagram 4.
Instructions for Use
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