Model
Natural Gas G20
Propane G31
VC12
8.8 mbar
27.0 mbar
VC20
8.9 mbar
26.6 mbar
Model
VC12
VC20
Nominal heat input gross
Natural Gas (G20)
kW
11.4
19.5
Propane (G31)
kW
11.4
18.5
Injector size
Natural Gas (G20)
mm
3.0
3.8
Propane (G31)
mm
1.9
2.3
Number of injectors
1
Gas flow rate
Natural Gas (G20)
1.1
1.85
Propane Gas (G31)
0.43
0.69
Gas supply
Connection R
1
/
2 1
/
2
BSP external thread
Gas pressure
Natural Gas (G20)
max. 25.0 mbar - min 17.5 mbar
Propane (G31)
max. 57.5 mbar - min 30 mbar
Electrical supply
230 Volts 1 phase 50 Hz
Current rating
0.55 amps max. (inductive)
External fuse rating
3 amps
Ignition
Electronic programme start-up with spark ignition
Noise level dBA @ 3m ‘free field’
48
Dimensions
mm
1703L x 1254W x 201D
Flue diameter
OD
102mm single wall or 127mm twin wall
Ducted air diameter
OD
102mm
Total installed weight
kg
91
Minimum mounting height m
4.3
5.2
Electrical motor details
V220 ac 50Hz Class F
Fan rating
0.5A
1
This heater is for use on:-
Natural gas G20, 20 mbar, Propane G31, 37
mbar / 50 mbar.
The gas connection on the Vision Compact
heater is R
1
/
2
(
1
/
2
in. BSP internal thread).
Natural gas
Max supply pressure 25 mbar
Min supply pressure 17 mbar
Propane
Max supply pressure 57.5 mbar
Min supply pressure 30 mbar
Correct burner gas pressure is indicated in
the table below.
Before installation, check that the local
distribution conditions, nature of gas and
pressure and adjustment of the appliance
are compatible.
Ambi-Rad heaters must be installed in
accordance with the relevant provisions of
the Gas Safety (Installations and Use)
Regulations 1998. Due account should also
be taken of any obligations arising from the
Health and Safety at Works etc. Act 1974.
In addition the installation must be carried
out in accordance with the current IEE 1992
(BS 7671), BS 6896:1991 (Industrial &
Commercial) and any other relevant British
Standards and Codes of Practice.
A gas meter is connected to the service pipe
by the local gas region or a qualified local
gas region contractor. An existing meter
should be checked preferably by the Gas
Region or a qualified local Gas Region
Contractors to ensure that the meter is
adequate to deal with the rate of gas
supply required. Installation pipes should
be fitted in accordance with BS 6891:1998,
such that the minimum pressure at least, as
stated in the table below will be achieved
and any other British Standards and Codes
of Practice. Pipes of smaller size than
the heater inlet gas connection should not
be used. The complete installation must be
tested for soundness as described in the
previous standard.
The gas supply must not be in the position
where it is subject to overheating.
The gas union service cock
MUST
be fitted
in the gas supply close to the heater, but
not onto the burner itself.
It is essential to provide some flexibility in
the final gas connection by use of a tested
and certified metallic hose to BS 6501 Part
1:1991 (minimum acceptable quality Type ‘B’
Class 1). When stainless steel flexible hoses
are used the hose should be connected in a
180 (bend without any strain or torsion).
(See figure 1).
Note: Take care when making a gas
connection to the heater not to apply
excessive turning force to the internal
controls.
2 Gas connection
3 Standards
1 Vision Compact gas fired
radiant tube heaters
Injector gas pressure
Technical data
