37
The draining of the heating system must be carried out as
follows:
-
Turn off the boiler and the bipolar switch;
- Loosen the automatic air release valve;
- Open the system's discharge valve and gather the water
that comes out in a container;
-
Empty out from the lowest points of the system (where
provided).
If the system is to be left active in areas where the room
temperature may go below 0°C during winter, it is recommended
that anti-freeze liquid be added to the water in the heating
system in order to avoid the need for repeated draining.
Draining the domestic hot water system
Every time that there is a danger of freezing, the domestic hot
water system must be drained as follows:
-
close the water mains stop-cock;
-
open all the hot and cold water outlets;
-
empty out from the lowest points (where provided).
3.9.
C
OMBUSTION
A
NALYSIS
3.11
D
RAINING
The boiler is designed to allow for easy analysis of the products
of combustion.
Using the flue analysis points, it is possible to detect the
temperature of the bur nt gas, the combustion air, the
concentrations of O
2
, CO
2
, etc.
To a c c e s s t h e s e p o i n t s, u n s c r ew t h e f r o n t s c r ew a n d
remove the metal plate and seal.
T h e b e s t t e s t c o n d i t i o n s , w i t h t h e m a x i m u m h e a t i n g
power, are achieved when the FLUE SWEEP FUNCTION
is enabled (press the RESET KEY for 5 seconds and the
p r o g r a m m i n g key s + a n d - ) . T h e b o i l e r w i l l r e t u r n t o
normal operating conditions automatically after 5 minutes,
or if you press the reset key. When you have finished,
reposition the metal plate correctly and make sure the
seal fits perfectly.
3.10
C
OMPLETION
D
AILY
T
EST
.
In order to prevent the shutdown of the components, the
boiler carries out a self-diagnosing test every 21 hours: the
pump turns on for 15 seconds and the diverter valve moves.
A
NTI
-
FROST
D
EVICE
.
The anti-frost function acts on the central heating flow
temperature probe, independently from other regulations, when
the board is turned ON.
If the primary circuit temperature falls below 8°C the pump will
for 2 minutes.
After the two minutes of circulation (fixed) the boiler will check
the following:
a) if the central heating flow temperature is > 8°C, the pump
stops;
b) if the central heating flow temperature is between 3 and 8°C,
the pump will run for another two minutes;
c) if the central heating flow temperature is < 3°C, the burner will
fire (heating position) at minimum power until the temperature
reaches 33°C, the burner will go out and the pump will continue
to run for two minutes.
If the flow temperature remains between 3-8°C the pump will
continue to run for two minutes for a maximum of 10 times
unless a temperature above 8°C is detected in the central
heating flow, after this the the burner will fire.
If lockout is caused by overheat the burner is kept OFF.
N
OTE
:
In all cases, the circulation takes place in the central
heating system.
The anti-frost device activates only when (with the boiler
operating correctly):
- the system pressure is correct;
- the boiler is electrically powered;
- there is a supply of gas.
A
NTI
-
SCALE
D
EVICE
.
When producing domestic hot water, the burner shuts off
whenever the output temperature of the hot water exceeds
61°C or the flow temperature of the primary circuit exceeds
78°C. It will not turn on if the temperature of the primary
circuit is greater than 78°C.
For the Republic of Ireland it is necessary to complete a
“Declaration of Conformity” to indicate compliance to I.S. 813.
An example of this is given in the current edtion of I.S. 813. In
addition it is necessary to complete the Log Book.
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