Toyotomi Laser 60AT Manual page 30

L A S E R
Section 5
5-1 INTRODUCTION
Servicing is required when the Laser 60AT is not running
at proper efficiency. This section covers the possible
causes and the corrective procedures for efficiency loses.
Signs of improper heater efficiency and performance
would be:
I A yellow, high flame.
I A whistling noise.
I Smoke from the flue pipe exhaust .
I Heavy soot and carbon build up in burner, heat
chamber or exchanger.
I Lowered heat output.
I Failed ignition.
I Failure to maintain combustion.
I Noise from the blower motor.
5-2 CLEANING THE GLASS CYLINDER
AND BURNER
Under normal running conditions, very little soot will be
formed inside the burner. A light covering of soot will not
affect the performance of the heater. Thus the heater
should not need cleaning. If a heavy soot build up
occurs, follow the outlined steps for opening and
cleaning the heater.
The burner is assembled using gaskets to maintain its
air-tightness. If these gaskets are damaged, the air may
cause soot and/or cause noise.
NOTE:
When cleaning the burner, it is recommended
to slide the heat chamber gasket onto a piece
of cardboard. Or replace the gaskets, if
necessary, carefully remove the gaskets
because they are easy to break.
1. Remove top plate.
2. Remove top heat shield.
3. Remove heat exchanger.
4. Remove glass cylinder.
5. Remove ceramic logs.
6. Remove reflector.
7. Remove flame rod sensor.
8. Turn burner ring counter-clockwise to remove. Burner
ring is secured on three burner side pins. If burner ring
does not turn, pull it up slightly to loosen spring clips.
27 S E R V I C E M A N U A L
H E A T I N G
9. Clean inside of glass cylinder by using a cloth. Use
NOTE:
10. The burner ring may deform and deteriorate after
NOTE:
When replacing the burner ring, carefully ensure that all three
burner side pins are correctly engaged inside the burner.
11. Reinstall the glass cylinder and the flame rod sensor
Unplug the Laser 60AT from the power supply before
proceeding.
1. Shut off the fusible link valve and the shut-off safety
2. Remove the fuel pipe from the burner and the fuel
3. Once the lines are clear, reconnect the fuel pipe,
NOTE: A water block fuel filter is recommended on the
S Y S T E M S
wire brush to clean burner air holes. Clean all
carbon on the burner bottom by using a flat-bladed
screw driver or wire brush. Vacuum all carbon
deposits and wipe clean.
Make sure that all air inlet openings are clear.
several years of use and should be cleaned and
inspected before reinstallation. If burner ring is badly
warped, cracked or deteriorated, it should be replaced.
A bent burner ring may cause abnormal
combustion with uneven and/or yellow flames
extending into the chamber.
in the correct position.
Figure 5-1
5-3 REMOVAL OF WATER DEPOSITS
AND CONTAMINANTS FROM FUEL
SUMP AND FUEL LINES
valve. Also, shut off the valve of the external tank.
pump, and drain the fuel into a pan.
open all valves and turn the ON/OFF switch to "ON".
Proceed with a test run.
fuel line from the tank.
Servicing