Remeha Gas 350
10
8 GAS
SUPPLY
8.1 General
The gas train is fitted behind the front casing.
The local Gas authority should be consulted to ensure
that an adequate pressure and supply is available. To
minimise risk of sediment or foreign particles entering
the control valves, an approved filter can be fitted into
the pipe system downstream. The gas supply should be
conforming to the British Gas safety regulations.
8.2 Gas
pressure
Natural gas, cat. I
2H 3B/P
(20 mbar).
Maximum gas pressure at inlet 100 mbar. Recommend-
ed min gas pressure required at the boiler is 17 mbar
with it operating at high fire.
Main burner pressure settings:
full load:
14.0 mbar
part load:
5.0 mbar
Pilot burner pressure settings: 13 mbar
Gas inlet pressure:
17 - 100 mbar
8.3 Injectors
Injector size main burner:
4.0 mm
Injector size ignition burner:
0.5 mm
8.4 Operation on propane
The boiler is supplied, as standard set for natural gas,
therefore the boiler must be converted to propane
BEFORE
the boiler is fired and commissioned for the
first time on propane.
Important:
The boiler can only operate
ON/OFF
once
converted to propane!
For operation on propane the main burner injectors and
pilot burner injector (Ø 0.25 mm) must be replaced. Also
the burner pressure must be adjusted.
It is important
to remove the cooling rods from the burners, includ-
ing their supports.
Use our conversion kit for propane and follow the fitting
and commissioning instructions.
Technical data for operation on propane are shown in
table 03
Note:
Place the sticker from the conversion kit to indi-
cate that the boiler has been changed for propane firing.
Number
of
sections
Heat
output
Heat
input Hi
Burner
pressure
1)
Gas consumption
2)
Injector size
main burner
Injector size
pilot burner
kW
kW
mbar
m
3
/h
kg/h
Ø
mm
Ø
mm
4
64
72
28
2.9
5.6
2.5
0.25
5
87
97
28
4.0
7.5
2.5
0.25
6
109
121
28
4.9
9.4
2.5
0.25
7
130
145
28
5.9
11.2
2.5
0.25
8
152
169
28
6.9
13.1
2.5
0.25
9
174
193
28
7.9
15.0
2.5
0.25
table 03 Technical data propane
1)
The burner pressure may never vary more than 20% of the inlet pressure
2)
Caloric value propane = 24.44 kWh/m
3
= 12.9 kWh/kg
9 ELECTRICAL
SUPPLY
9.1 General
The electrical installation must conform to the IEE regu-
lations and also to local authority requirements.
9.2 Control
box
The Satronic control box is fitted behind the front casing.
9.3 Electrical
connections
The boiler is pre-wired requiring only a mains supply
and external controls connected to the control panel.
The boiler can be fitted as an option, with a basic or an
extended signalling print.
Functions of the basic signalling print:
- general
alarm
-
operating signals stage 1 and stage 2
Functions of the extended signalling print:
- general
alarm
-
operating signals stage 1 and stage 2
-
no power supply
-
valve leakage failure
- burner
failure
-
low water level
-
down draught thermostat
-
water level control
-
high limit thermostat
.
