Radiant BH15UT, Installation, Operation & Service Manual

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RADIANT SERVICES™ I
NSTALLATION
O
PERATION AND
S
ERVICE
M
ANUAL
60
SECTION 15: SERVICING INSTRUCTIONS
IMPORTANT: Ne v er u se the heater as a s u pport for
ladders or other access eq u ipment. Al w ays test for gas
so u ndness w ith a s u itable detection fl u id after completing
any ser v icing or exchange of gas carrying component.
On completion of any ser v ice/fa u lt finding tasks w hich
req u ire the breaking and remaking of electrical
connections, the checks:- A:Earth Contin u ity, B:Polarity
and C:Resistance to Earth m u st then be repeated.
15.1 Annual Procedure
Carry o u t the follo w ing proced u re ann u ally. The preferred
time w o u ld be immediately before the w inter heating
period. If v ery dirty conditions arise, it may be necessary
to carry o u t this proced u re more often. If the u nit takes in
air thro u gh an air d u ct or filter assembly, more freq u ent
ser v ice may be necessary.
15.1.1 B u rner and Fan Remo v al
Isolate the heater from the gas and electrical s u pplies.
Remo v e the fan pl u g from the b u rner. Unscre w the
sec u ring scre w s on the b u rner flange. The b u rner can
no w be remo v ed. Take care not to dist u rb the gasket on
the flanged b u rner t u be. Unscre w the sec u ring scre w on
the fan flange spigot. The fan can no w be remo v ed.
15.1.2 B u rner and Fan Remo v al Maintenance
Remo v e the fan and b u rner independently to floor le v el
and clean both items internally u sing a soft br u sh and
compressed air, if a v ailable. Take care not to damage the
internal parts of the b u rner. Check fan impeller for
cleanliness and free rotation.
The electrodes are an integral part of the b
u rner. To
check spark gap, remo v e the sec u ring scre w s on the
electrode and w ithdra w it ens u ring the gasket is not
damaged. Spark gap on electrode sho u ld be
approximately 3 mm.
15.1.3 T u be and Reflector Maintenance
With b u rner and fan remo v ed, clean the o u ter s u rfaces of
the t u bes u sing a br u sh and w ipe the inner s u rface of the
reflector w ith a soft damp cloth - u se a ho u sehold
detergent if necessary. Ne v er u se abrasi v e cleaners on
the reflectors. Reassemble the b u rner and fan in re v erse
order. Carry o u t the Testing Proced u re. See Page 59,
Section 14.2
.
15.2 Component Removal
First, isolate the heater from the gas and electrical
s
u pplies. Entry to the b u rner assembly is gained by
remo v ing the door scre w s and opening the hinged side
co v er. Entry to the comb u stion chamber is gained by
remo v ing the comb u stion chamber co v er.
15.2.1 Electrode
Fi g ure 36: B u rner C u p Position
15.2.2 B u rner Head/Injector Jet
When the co v er is remo v ed completely, the b u rner
assembly is exposed. Unscre w the b u rner c u p. Remo v e
brass injector jet (orifice). Replace in re v erse seq u ence.
15.2.3 Solenoid Val v e/Go v ernor
Remo v e b u rner head. Remo v e scre w s sec u ring the
solenoid/go v ernor body bracket. Withdra w the fo u r w ires
bet w een the solenoids. The solenoid/go v ernor and
fittings can no w be w ithdra w n from the compartment. The
solenoid(s) can be remo v ed from the body by u nscre w ing
central scre w . Replace in re v erse seq u ence. Note: Earth
is green/yello w .
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
More than one
disconnect switch may
be required to
disconnect electric from
heater.
Heater must be
connected to a properly
grounded electrical
source.
Burner Cup
( center horizontally )
Electrode
Assembly
1 6 mm
Air P late
Jet