48
9-04-02
Trouble or Complaint
Possible Cause
Action
7.
Burner pulsates
(a) continuously.
(b) at initial firing.
8.
Burner locks out on
morning starts then
runs perfectly for
rest of day.
9.
Burner fails due to
blown fuse.
10. Burner runs
normally but will
not reach desired
temperature.
11. Poor Combustion
readings
Air shutter setting incor-
rect or fan inlet blocked.
Grossly oversized noz-
zle.
Air supply inadequate.
Worn nozzle with ex-
cess throughout or un-
even spray pattern.
Air in supply line.
Blocked flue ways.
Localised low voltage
supply in early morn-
ing.
Air present in oil supply.
Bottom of oil tank below
level of oil pump.
Non-return valve faulty
or air leak in two pipe
oil supply system.
Short circuit in wiring.
Motor seized.
Breakdown of insula-
tion of motor windings,
Oil throughput insuffi-
cient.
Low efficiency and CO
2.
Low efficiency due to
high flue gas tempera-
ture.
Faulty Control stat.
Partially blocked filter.
Low CO
2
.
High CO
2
.
High Smoke.
High flue gas tempera-
ture.
Inspect and reset or remove blockage.
Check and replace with correct size and type.
(see Technical data).
Check fan operation and cleanliness.
Replace with nozzle of correct type and size.
(see Technical data).
Purge at pump to remove.
Clean Heater and flue.
Check with local Electricity Board to fit recorder,
enlist aid of the Board.
Restart burner several times - press lockout reset
button, repeat 7(b) above.
Raise tank or install a two pipe oil supply from
tank.
Renew non-return valve. Rectify air leak.
Inspect wiring, sheathing and inter-component
connections for broken or damaged leads.
Replace if necessary.
Check by hand and replace if necessary.
Replace motor.
Check nozzle size and pressure against rating.
Check combustion readings, reset air.
Clean heat exchanger surfaces.
Replace, check and clean.
Check: air shutter, oil pressure, nozzle size. (see
Technical data).
Check: air shutter, oil pressure, nozzle size, fan
impeller blades, for cleanliness.
Check: air shutter, nozzle size (see Technical Data)
and burner head geometry. Check all baffles are in
place and correct.
Check: air shutter, nozzle size (see Technical Data)
Clean heat exchanger surfaces.
Summary of Contents for COH110
Page 60: ...14 Fig 4 9b Reillo bypass adjustment 9 04 02 Fig 4 9a Reillo bypass adjustment ...
Page 63: ...17 9 04 02 ...
Page 82: ...36 9 04 02 ...
Page 83: ...37 Model 220 only Fig 8 3c Model 280 only Fig 8 3d Top Top Top 9 04 02 ...
Page 86: ...40 9 3 BURNER PARTS 9 04 02 Model 110 443T58 ...
Page 87: ...41 29 01 08 Model 180 459T55 3007708 ...
