To Light The Boiler; Control Of Water Temperature; Central Heating - IDEAL istor HE325 User Manual

To light the boiler.

Refer to the programmer section of these instructions to set the
required programs.
1. CHECK THAT THE ELECTRICITY SUPPLY TO THE BOILER
IS OFF.
2. Set the mains ON/OFF switch (A) to OFF and CH thermostat
knob (F) to maximum.
3. Ensure that all DHW taps are turned off.
4. Switch ON the electricity supply to the boiler and check that
all external controls, e.g. programmer, room thermostat etc.,
are ON.
5. Set the mains ON/OFF switch to ON.
The boiler will commence the ignition sequence, first supplying
heat to preheat the domestic hot water and then to the central
heating, if required.
Note. In normal operation the control unit display (C) will show
codes:
Standby - no demand for heat.
CH being supplied.
DHW being supplied to reheat the cylinder.
During ignition, the LED (E) will flash.
During normal running the LED (E) will remain illuminated.
Note. If the boiler fails to light after 3 attempts the fault code
will be displayed.
Press the reset button (D) for 2 seconds then release. The
boiler will repeat the ignition sequence. If the boiler still fails to
light consult a CORGI registered installer.
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.
The DHW 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 external controls to OFF, or turn the CH thermostat
knob (F) to minimum.
The boiler will fire periodically to maintain the DHW cylinder in a
preheated condition and whenever there is a demand for DHW.
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 Frame 1

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 thermostat knob (F).
ist8368
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
Approx. flow temperatures for the
boiler thermostat settings are:
Central Heating
Knob Setting CH Flow
Temp
o o
C ( F)
Max 82 (180)
Min 30 (86)
3