OPERATING INSTRUCTIONS FOR THE USER
Fig. 1
KEY
A
Temperature/pressure gauge
B
Time clock
C
Selector switch summer/winter
D
C.H. thermostat
E
D.H.W. thermostat
F
Viewing window
THE GAS SAFETY (INSTALLATION AND USE) REGULATIONS
1996. It is the law that all gas appliances are installed by a
registered person, in accordance with the above regulations.
Failure to install appliances correctly could lead to prosecu-
tion. It is in your own interest, and that of safety, to ensure
that the law is complied with.
It is essential that the appliance is correctly earthed. An
electricity supply of 240 V - 50 Hz fused at 3 A is required.
Read these instructions carefully before attempting to oper-
ate the appliance.
1.1
INTRODUCTION
The Sime
“FORMAT C”
family is a fully automatic, wall mount-
ed, room sealed, fan assisted range of combination boilers.
When operating in winter mode, the appliance provides cen-
tral heating as required and produces instantaneous hot
water upon demand.
When operating in summer mode, the central heating is not
operational however the appliance continues to supply hot
water whenever it is required.
The heat output is automatically controlled by the fully modu-
lating gas valve (within its pre-set limits), and there are user
adjustable potentiometers to control the temperature of
both central heating and domestic hot water.
A temperature/pressure gauge is fitted and an overheat ther-
mostat is incorporated to protect against fault conditions.
1.2
APPLIANCE OPERATION
A demand of hot water will be sensed by the appliance
detecting water flow (providing that the flow rate is above 2
l/m - 0.5 gal/min).
The fan will start and the burner will light at full output. If
the draw off rate is near the maximum design flow rate
the appliance will run continuously at full output until a tap
is either turned off or the flow rate is reduced in which
case the heat output will reduce accordingly to maintain a
steady temperature.
Hot water is made available almost immediately at the appli-
ance outlet, but the final temperature and time taken for the
hot water to reach a tap depends upon the potentiometer
setting, the rate at which water is drawn off, and the length
of the pipe between the boiler and the tap.
When the tap is turned off, the appliance will revert to C.H.
mode (if set on winter position) otherwise the burner will be
extinguished pending the next demand for hot water.
1.3
OPERATING INSTRUCTIONS
1.3.1
To light the appliance (see fig. 1)
– Check that the electricity supply is off and that the D.H.W.
isolation valve is in the open position (lever vertical). Check
that the gas supply is on.
– Turn the selector switch summer/winter (C) to SUMMER
(water only) position “
”.
– Switch on the electricity supply and full open any D.H.W.
tap. The burner will light.
Check that the burner has lit by looking through the view-
ing window (F). If the burner fails to light, turn the selector
switch summer/winter to “
“ position and release it
immediately; then turn it to the SUMMER position: the
burner should now light. Turn off the tap.
– Check that the room thermostat and time clock are call-
ing for heat. Turn the heating potentiometer (D) to maxi-
mum (fully clockwise).
– Turn the selector switch summer/winter to the WINTER
position “
❄
" and the burner will light to serve the heating load.
A
E
C
F
B
D
DHW
ISOLATION VALVE
6
