2
GAS SAFETY (INSTALLATION AND USE) REGULATIONS
1984. It is the law that all gas appliances are installed by a
competent person, in accordance with the above regula-
tions. Failure to install appliances correctly could lead to pro-
secution. 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 sup-
ply of 240 V - 50 Hz fused at 3 A is required.
Read these instructions carefully before attempting to ope-
rate the appliance.
1.1
INTRODUCTION
The Sime
“FRIENDLY”
is a wall mounted, fan assisted
balanced flue combination boiler. When operating in winter
mode, the appliance provides central heating as required
and produces instantaneous hot water upon demand up to
a maximum output of 24.0 kW (82,000 Btu/h). When ope-
rating in summer mode, the central heating is not operatio-
nal however the appliance continues to supply hot water
whenever it is required. The heat output is automatically
controlled by the fully modulating gas valve (within its pre-
set limits), and there are user adjustable thermostats to con-
trol the temperature of both central heating and domestic
hot water. Pressure gauge is fitted and an overheat thermo-
stat 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
2.8 l/m - 0.62 gal/min). The fan will start and the main bur-
ner will light at full output. If the draw off rate is near the
maximum design flow rate the appliance will run conti-
nuously 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
appliance outlet, but the final temperature and time taken
for the hot water to reach a tap depends upon the thermo-
stat 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 (J) is in the open position. Check
that the gas supply is on.
– Turn the Summer/Winter switch (B) to SUMMER (water
only) position “
”.
– For
“FRIENDLY”
model switch on the electricity supply.
Fully depress the gas valve control knob (H) and hold in.
After approximately 15 secs. a spark will light the pilot.
After a further 20 secs. release the button and the pilot
should remain alight (check through the viewing win-
dow). Fully open any D.H.W. tap and the burner will
light. Turn off the tap.
– For
“FRIENDLY E”
model 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
viewing window (G). If the burner fails to light, press the
overheat thermostat reset button (I) once and the bur-
ner should now light. Turn off the tap.
– Check that the room thermostat (if fitted) is calling for
heat and turn the clock overriding switch (A) to the ON
position “
●
”. Turn the heating thermostat (C) to maxi-
mum (fully clockwise).
– Turn the Summer/Winter switch to the WINTER position
“
❄
" and the burner will light to serve the heating load.
– Set the Summer/Winter switch (and the room thermo-
stat if fitted), to the desired position and set the requi-
red temperature for the C.H. and D.H.W. by rotating the
thermostats (C - D) clockwise to increase or anticlockwi-
se to decrease the temperature.
NOTE: when operating in winter mode, priority is
automatically given to providing hot water when the
demand arises.
1.3.2 To turn the appliance off (see fig. 1)
–
For short periods:
Set the Summer/Winter switch (B) to SUMMER position
“
”. When required - restore the switch to the WIN-
TER position “
❄
”.
–
For longer periods:
Set the Summer/Winter switch (B) to SUMMER position
“
”. For
“FRIENDLY”
model turn the gas control knob
clockwise to extinguish the pilot. Isolate the gas service
Fig. 1
KEY
A
Clock overriding switch
B
Summer/Winter switch
C
C.H. thermostat
D
D.H.W. thermostat
E
Time clock
F
Pressure gauge
G
Viewing window
H
Gas valve control knob (
“FRIENDLY”
model)
I
Overheat thermostat
reset button (
“FRIENDLY E”
model)
K
Gas service cock
J
D.H.W. inlet valve
OPERATING INSTRUCTIONS FOR THE USER
