Model
Natural Gas G20
CB40
11.8 mbar
Model
CB40
Nominal heat input gross
Natural Gas (G20)
kW
38
Injector size
7 holes @dia 2.4
Number of injectors
1
Gas flow rate
m3/hr
3.6
Gas supply
Connection R 1/2 1/2 BSP external thread
Gas pressure
Natural Gas (G20)
max. 25.0 mbar - min 17.0 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’
40
Dimensions
mm
2298L x 1865W x 256D
Flue diameter
OD
125mm
Ducted air diameter
OD
102mm
Total installed weight
kg
152
Minimum mounting height m
5.7
Electrical motor details
V220 ac 50Hz Class F
Fan rating
0.5A
1
Technical data
Injector gas pressure
1 Gas supply/connection/
technical data
This heater is for use on:-
Natural gas G20, 20 mbar.
The gas connection on the Cobra heater is
R1/2 (1/2 in. BSP internal thread).
Natural gas
Max supply pressure 25 mbar
Min supply pressure 17 mbar
Correct burner gas pressure is indicated in
the table below.
To gain access to the gas connection, see
section 10.
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 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 (Please see the technical
data 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.
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 overleaf).
Note: Take care when making a gas
connection to the heater not to apply
excessive turning force to the internal
controls.
