6
User’s operating instructions
6.2 - CHECK LIST BEFORE COMMISSIONING
THE BOILER
Before commissioning the appliance it is recommended to
check the following points:
- Check that the On-Off gas valve, positioned upstream of
the boiler, is in the On position.
- Check that any On-Off valves fitted on the flow and return
pipes for servicing purposes are in the On position.
- Check that any On-Off valves fitted on the cold water inlet
for servicing purposes are in the On position.
- Check that the pressure relief valve drainage pipe is con-
nected to the sewage system.
- Check that the boiler is connected to the electrical supply;
the green indicator led ( ) on the control panel must be
illuminated.
- Check the heating system pressure, indicated by the pres-
sure gauge. For correct operation the pressure should be
between 0,8 and 1 bar (with the pump not running).
If the pressure falls below 0,7 bar restore the correct pres-
sure by regulating the filling valve when the system is cold
and the boiler not operating (refer to paragraph 6.5).
6.3 - BOILER OPERATION
SHUTTING DOWN THE BOILER
To disenable the CH mode
Turn the knob (B) completely to the left to
disenable the CH mode. The DHW mode
however remains enabled (SUMMER
mode).
Complete boiler shut down
If the boiler is completely shut down, the CH and DHW mode
will be completely disenabled.
To completely shut down the boiler, switch off the electrical
supply to the boiler (the green “Power On” led
is not illumi-
nated).
If the boiler will remain shut down for a longer period, turn the
On/Off gas cock into the Off position and, if fitted, turn the cold
water supply cock into the Off position.
6.4 - FROST PROTECTION MODE
The boiler is fitted with a frost protection system which will
operate automatically when the system temperature falls be-
low 6°C: the burner is automatically fired and the pump is ener-
gized until the system’s water temperature has risen to 16°C.
If the temperature detected by the CH sensor falls below 2°C,
burner operation is automatically stopped until the temperatu-
re has risen to 5°C.
WARNING!
This feature will operate only if the electrical
supply to the boiler is On (green Power On led
illuminated).
However, further frost protection can be incor-
porated by using specific frost protection pro-
ducts, suitable for multi-metal systems.
Do not
use anti-frost products for motor vehicles
because they could seriously damage the
water gaskets.
If, for any reason, there is no gas or electrical
supply, the above described frost protection
mode will not be active.
Domestic hot water production
Position the domestic hot water control knob
(A) to the desired DHW temperature:
- with the knob turned completely to the left
= MIN
- with the knob turned completely to the ri-
ght = MAX
Note:
By adjusting the DHW temperature at a tem-
perature very close to the one actually used
will avoid mixing hot water with cold water, thus
resulting in fuel savings and a significant re-
duction of lime scale formation.
When a tap or shower is turned on the appliance will provide
domestic hot water at the desired temperature
Enabling and disenabling the “RIRA” pre-heating function
(only on the Alkon35S C model)
This function can be enabled/disenabled by
pressing this key.
Green led On > RIRA function
enabled
Green led Off > RIRA function
disenabled.
If this function is enabled it will guarantee an immediate sup-
ply of domestic hot water.
Central heating mode
The boiler will operate in the CH mode
when the knob (B) is positioned within
the range indicated in the figure.
- with the knob in the position 1, the mi-
nimum temperature corresponds to
30°.
- with the knob in the position 2, the
maximum temperature corresponds to
80°C.
