elco RPD 100, Руководство по эксплуатации

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89
Exhaust Gas Test
Trouble Shooting Instructions
Exhaust gas loss
Exhaust gas loss by way of free heat
will occur as a result of the temperature
difference between the fuel-air mixture
entering the furnace chamber and the
gases discharged. Any increase in the
excess of air and the resultant higher
exhaust gas volume will cause the
exhaust gas loss to rise. The exhaust
gas loss can be calculated as follows:
Example:
Data measured in natural gas mode:
CO
2
content of exhaust gases 10,8%
Exhaust gas temperature 195°C
Air intake temperature
22°C
The exhaust gas loss can be calculated
as follows:
Data measured in fuel oil mode:
CO
2
content of exhaust gases 12,8%
Exhaust gas temperature 195°C
Air intake temperature
22°C
The exhaust gas loss can be calculated
as follows:
q
A
= exhaust gas loss in %
t
A
= exhaust gas temperature
in °C
t
L
= combustion air temperature
in °C
CO
2
= volumetric content of carbon
dioxide in %
q
A
t
A
t
L
–
( )
A
1
CO
2
-----------
B +
⎠
⎞
⎝
⎛
⋅
=
Light oil
EL
Heavy oil
S
Natural
gas
Town
gas
L.P.G.
A
1
= 0,50 0,490 0,370 0,350 0,420
B = 0,007 0,007 0,009 0,011 0,008
In any case of trouble proceed with
checking the basic conditions for a
proper operation of the boiler
system:
1.Is electric power available?
2.Is fuel oil contained in the tank?
3.Is ther any gas pressure?
4.Are the shut-off valves opened?
5.Are all control and safety instruments
such as boiler thermostat, water
supply failure cut-out, limit switches,
etc. properly set?
1. Ignition failure
Cause Remedy
Ignition elec-
trode short cir-
cuit. Adjust
electrodes.
Wide ignition
electrode
spacing. Adjust
electrodes.
Dirty and wet
electrodes. Clean
electrodes.
Cracked
insulator. Replace
insulator.
Defective igni-
tion transformer. Replace
transformer.
Defective auto-
matic furnace
controller. Replace
controller.
Burnt ignition
cable. Replace cable;
search for cause
and eliminate.
Pilot burner
failure. Adjust ignition
gas pressure
Ignition gas
valve does not
open. Search for
cause and elimi-
nate
Defective
solenoid. Replace
2. Motor running failure
Cause Remedy
Motor protection
relay and fuses. Check and
replace if
required.
Air pressure
switch not
changed over or
defective. Check and
replace if
required.
Defective motor. Replace motor.
Defective power
contactor. Replace
contactor.
Air fan motor
starts but stops
after 20-25 secs. Check for
solenoid leaks
Air fan motor
starts, but stops
after about 10
secs in pre-venti-
lating mode. Air pressure
switch fails to
change over;
replace switch if
defective; clean
switch if dirt has
accumulated;
check electrical
connections.
3. Pump oil delivery failure
Cause Remedy
Shut-off valves
closed. Open valves.
Filter blocked by
dirt. Clean filter or
replace cartridge.
Filter leaks. Replace filter
Oil lines leak. Retighten scre-
wed unions; tigh-
ten oil lines.
Suction valve
leaks. Remove and
clean or replace.
Direction of rota-
tion of pump. Check irection of
rotation.
Damaged gear-
box. Replace pump.
Reduced pump
output. Replace pump.
-Strong mechanical noise.
Pump takes in air Retighten scre-
wed unions.
High vacuum in
oil pipe Clean filter; fully
open valves.
For heavy oil:
Incorrect oil tem-
perature. Check pre-hea-
ter:
thermostat set-
ting, dirt