1403BSHH_AMEN,page 19/29
GAS CONVERSION
This air heater is designed to operate on natural,
propane or butane gas and will be supplied as ordered
for the gas type specified. In the event it is required to
convert to a different gas type to that which has been
supplied, conversion of the gas burner must be carried
out. This can only be carried out by an appropriately
qualified person current to IEE regulations
An approved conversion kit to suit the appropriate gas
type must be used.
In addition to changing the burner injectors, and
adjusting the burner gas pressure (pressure regulator
or throttle adjusting screw), for sealing the governor or
the throttle adjusting screw it is necessary to fix data
plate over stickers as supplied with the conversion kit
of parts (propane see figure 15).
After conversion re-commission appliance according to
section 9 of this document.
Remark: Always check the propane gas quality, a too
high percentage of butane can cause sooting of the
heat exchanger.
Figure 15
T a b l e 7 : H i g h / l o w b u r n e r g a s p r e s s u r e s
055
083
102
Injector dia (1x)
mm
6,80
7,60
8,90
burner pressure
100%
mbar
8,30
10,40
8,80
burner pressure
50%
mbar
2,08
2,60
2,20
Injector dia (1x)
mm
4,50
4,50
5,60
burner pressure
100%
mbar
15,70
34,36
23,50
burner pressure
50%
mbar
3,92
8,59
5,87
Natural
gas G20
Type
Propane
gas G31
MAINTENANCE & SERVICE
12.1 Maintenance
schedule
General:
Before commencing servicing, turn off the main gas
supply and switch off the main electricity supply after the
air circulation fan has stopped.
The heater will operate with a minimum of maintenance.
It is recommended that maintenance is carried out at
least once a year by a suitably qualified person. More
frequent servicing may be required dependent upon the
environmental circumstances where the air heater is
installed. Regular inspection is necessary, especially in
dirty areas, to assess the servicing frequency.
Check condition and security of flue and combustion air
system.
Check for security and worthiness of the suspension or
mounting system.
Maintenance Schedule:
The following procedures should be carried out at least
once each year (see figure 16).
• Clean all dirt, lint, and grease from the fan and motor.
• Check the heat exchanger and externally for evidence
of physical damage.
• Check the burner for scale, dust, or lint accumulation.
Clean if required.
• Check the vent or vent/combustion air system for
soundness. Replace any parts that do not appear
sound.
• Check the wiring for any damage. Replace damaged
wiring.
11
Throttle adjustment screw
12
