Installation Manual
COMBI - TA01A011.B1003
7
Available head with by-pass partially (50%) on.
2
Available head at top speed.
Available head at second speed.
II
0
III
0
1
200
400
800
600
1000
3
4
5
6
Head m c.w. 6
1800
Flowrate litres/h
1400
1200
II
1600
III
GAS CONNECTIONS
The gas supply must be connected up by
qualified person.
The following standards must be complied
with: UNICIG 7131/72 and UNICIG 7129/92
(of 21/04/93)
Before installing the boiler, make sure of the
following:
•
the pipeline must be of an adequate
section and length to carry the flow
required and must be fitted with all safety
devices and measures prescribed by
current norms;
•
before turning on the boiler make sure the
type of gas which it is designed to run on
is available
•
the gas supply pressure must lie within the
values shown on the plate it is
recommended that the gas supply pipeline
should be checked for residual
obstructions before installing the boiler;
•
where the internal gas supply pipe meets
the boiler, a gas shutter cock must be
fitted which has the same diameter as the
gas inlet pipe;
•
check thoroughly that the gas inlets and
outlets are properly sealed.
•
conversion to allow the boiler to run on
LPG to natural gas or vice versa must be
carried out by a qualified gas fitter in
accordance with law no.46 of 5th March
‘90 (see p.18).
ANTI-FREEZE SYSTEM
ANTI-FROST SYSTEM
Radiant boilers are equipped with an Anti-
Freeze system which comes into operation when the temperature falls to 5° C (Heating sensor) and 4° C (Hot water sensor) and
protects the boiler down to –10°C external temperature.
To protect the internal Radiators, a room thermostat or remote control must be fitted.
NOTE
:
The frost system will only come into operation if the boiler is filled with water, and connected to a live gas supply, with
electrical supply and boiler controls in the “ON” position (With the Main switch turned to Summer or Winter position)
and the gas
supply turned on.
N.B.
For external installations, see instructions at page 6.
FOR THE INSTALLER
For boilers installed outdoors, where the temperature may drop below -2° degrees Centigrade, the system should be filled with
antifreeze liquid by an authorised technician and a set of electrical heating elements should be fitted to protect the domestic hot water
heat exchanger.
ADVICE FOR THE SERVICE TECHNICIAN
If the boiler is out of service because it is frozen, check that no parts have been locked in position by ice before putting it into
operation.
It is advisable to empty the boiler and the system in case of no operation for a long period.
Recommended percentage of glycol for temperatures down to - 8°C is 20%.
The antifreeze liquid used must be of a good make and in
a solution which has already been diluted to avoid the risk of uncontrolled dilution.
Table n°1
Antifreeze Temperature
Ethylene glycol
(%) volume
freezing point
(°C)
boiling point
(°C)
10 -
4 101
20 -10 102
Recommended Glycol 20% percentage for temperatures down to –8°C.
Circulating pump RSL 15/6-3
Summary of Contents for RH 28
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