3
User’s
TO START THE BOILER
If a programmer is fitted refer to separate instructions for the
programmer before continuing.
Start the boiler as follows:
1.
Check that the electricity supply to boiler is off.
2.
Set the mode knob (C) to ‘
BOILER OFF
’.
3.
Set the Domestic Hot Water temperature knob (A) and Central
Heating temperature knob (B) to ‘
MAX
’.
4.
Ensure that all hot water taps are turned off.
5.
Switch on electricity to the boiler and check that all external
controls, e.g. programmer and room thermostat, are on.
6.
Set the mode knob (C) to ‘
’ (winter).
The boiler will commence ignition sequence, supplying heat to the
central heating, if required.
Note.
In normal operation the boiler status display (D) will show codes:
00
Standby - no demand for heat.
Central Heating being supplied
Domestic hot water being supplied
PH
Domestic hot water preheat
FP
Boiler frost protection
- boiler will fire if temperature is below 5ºC.
During normal operation the burner on indicator ‘ ’ will remain
illuminated when the burner is lit.
Note: If the boiler fails to light after five attempts the fault code
will be displayed (refer to Fault Code page).
OPERATION MODES
Winter Conditions -
(Central Heating and Domestic Hot Water required)
Set the mode knob (C) ‘
’ (winter).
The boiler will fire and supply heat to the radiators but will give
priority to domestic hot water on demand.
The domestic hot water preheat will operate with the ‘
PREHEAT
’
button pressed so that the display shows “HOT WATER
PREHEAT ON”.
Summer Conditions -
(Domestic Hot Water only required)
Set the mode knob (C) to ‘ ’ (summer).
Set the central heating demand on the external controls to OFF.
The domestic hot water preheat will operate with the ‘
PREHEAT
’
button pressed so that the display shows “HOT WATER
PREHEAT ON”.
Boiler Off
Set the mode knob (C) to ‘
BOILER OFF
’. The boiler mains
power supply must be left on to enable frost protection (see Frost
Protection).
PREHEAT - DOMESTIC HOT WATER
The domestic hot water heat exchanger within the boiler can be
kept preheated to provide faster delivery of hot water at the tap.
This is achieved by pressing the ‘
PREHEAT
’ button (F) so that
‘HOT WATER PREHEAT ON’ is shown on the display.
The boiler will operate periodically for a few seconds to maintain
the domestic hot water heat exchanger in a preheated condition.
The avera ge time period between operation is 90 minutes. This
may vary considerably due to the surrounding ambient temperature
of the boiler. The boiler will operate whenever there is a demand
for domestic hot water.
If standard hot water delivery is satisfactory press the ‘
PREHEAT
’
button (F) so that ‘HOT WATER PREHEAT OFF’ is shown on the
display.
CONTROL OF WATER TEMPERATURE
Domestic Hot Water
The domestic hot water temperature is limited by the boiler
controls to a maximum temperature of 65
º
C, adjustable via the
domestic hot water temperature knob (A).
Approximate temperatures for domestic hot water:
Knob Setting
Hot Water Temperature (approx.)
Minimum
40ºC
Maximum
65ºC
Due to system variations and seasonal temperature fluctuations
domestic hot water flow rates/temperature rise will vary, requiring
adjustment at the tap : the lower the flow rate the higher the
temperature, and vice versa.
Central Heating
The boiler controls the central heating radiator temperature to a
maximum of 80
o
C, adjustable via the central heating temperature
knob (B).
Approximate temperatures for central heating:
Knob Setting
Central Heating Radiator Temperature (approx.)
Minimum
30ºC
Maximum
80ºC
For economy setting ‘
’ refer to Efficient Heating System
Operation.
2. BOILER OPERATION
continued..........
Legend
A. Domestic Hot Water Temperature Knob
B. Central Heating Temperature Knob
C. Mode Knob
D. Boiler Status Display
E. Burner ‘on’ Indicator
F. Preheat On Off button
G. Restart button
H. Central Heating Economy Setting
J. Pressure Gauge
ºC
HOT WATER
PREHEAT
ON
MIN
MAX
MIN
MODE
e
BOILER
OFF
PREHEAT
RESTART
MAX
A
J
D
E
B
C
F
G
H
‘ ’
