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To Light the Boiler.
F r a m e 1
The boiler incorporates a factory fitted programmer, refer to
page 5 onwards of these instructions for setting the
programmer before continuing.
1. CHECK THAT THE ELECTRICITY SUPPLY TO THE BOILER IS
OFF.
2. Set the mains ON/OFF switch (A) to OFF.
3. Ensure that all DHW taps are turned off.
4. Switch ON the electricity supply to the boiler and check that
the room thermostat is set to call for heat.
5. Set the mains ON/OFF switch to ON.
The boiler will commence the ignition sequence, first supplying
heat to pre-heat the domestic hot water and then to the central
heating, if required.
Note. In normal operation the itime programmer display (B) will
show the time of day.
Standby - no demand for heat.
CH being supplied.
DHW being supplied.
During normal running the flame symbol will remain
illuminated.
Note. If the boiler fails to light after 3 attempts the fault code
LF
"
" will be displayed.
Press the select button (C) for greater than 3 seconds then
release. The boiler will repeat the ignition sequence. If the boiler
still fails to light consult a Gas Safe Registered Engineer or in IE a
Registered Gas Installer (RGII).
O p e r a t i o n
Winter conditions - i.e. CH and DHW required.
The boiler will fire and supply heat to the radiators but will give
priority to DHW on demand during timed on periods.
The DHW pre-heat will operate as described under 'Summer
conditions' during periods when there is no call for CH.
Summer conditions - i.e. DHW only required.
Set the CH mode to OFF.
The boiler will fire periodically for a short period to maintain the
DHW storage tank in a pre-heated condition during a timed on
period. The average time period between firing is 90 minutes.
This may vary considerably due to the surrounding ambient
temperature of the boiler. The boiler will fire whenever there is a
demand for DHW during a timed on period.
Note.
The pump will operate briefly as a self-check once
every 24 hours, regardless of system demand.
CAUTION. To avoid the possibility of injury during the installation, servicing or cleaning
of this appliance care should be taken when handling edges of sheet steel components.
istor -
User's
Refer to
Control of water temperature
Domestic Hot Water
The DHW delivery temperature is controlled by thermostatic
mixer within the tank module (see illustration below).
Pull off the lower door from its locating pegs and adjust the
mixer valve to the required DHW delivery temperature.
IMPORTANT
60
o
C is the recommended maximum temperature.
Central Heating
The boiler controls the central heating radiator temperature to a
o
maximum of 82
C, adjustable via the CH temperature set point
adjustment within the programmer.
Domestic Hot Water
Knob
DHW
setting
Temp
C
O
Min
30
1
34
2
39
3
43
4
48
5
52
6
56
7
61
Max
65
Index
Mark
ist9884
Approx. flow temperatures for the
boiler thermostat settings are:
Central Heating
CH Flow
Temp
o
C (
Max
82 (180)
Min
30 (86)
o
F)
3
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