Burner Ring Assembly; Burner Mat / Coating; Flame Rod Sensor; Igniter - Toyotomi Laser 300 Service Manual

L A S E R
Section 1
channels air from the intake fan of the combustion
blower to the burner. The flame rod sensor is mounted
through the wall of the burner.
Laser 300: 20470242 Laser 530: 20479842
Laser 560: 20470442 Laser 730: 20470642
1-7

Burner Ring Assembly

This assembly is designed to promote efficient burning.
The burner ring assembly is held by spring clips to
mounting posts within the burner.
Laser 300: 20479543 Laser 530: 20478343
Laser 560: 20478343 Laser 730: 20478643
1-8

Burner Mat / Coating

The textured burner mat (coating) insures the even
vaporization of fuel for proper combustion.
Burner mat — Laser 300/laser 730
Burner Coating — Laser 530/Laser560
Laser 300: 20479513 Laser 730: 20478613
1-9

Flame Rod Sensor

The flame rod sensor checks the condition of the flame
for proper burning.
The flame rod sensor is mounted through the wall of the
burner.
Laser 300: 20470211 Laser 530: 20479811
Laser 560: 20470411 Laser 730: 20470611

1-10 Igniter

The ceramic-type igniter is designed to pre-heat the
burner pot, to vaporize, and ignite the air/fuel mixture to
start the combustion process.
Laser 300/Laser 530/Laser 560/Laser 730: 20470218

1-11 Flue Pipe

The wall thickness which the flue pipe can be installed is from
4 in. (100 mm) to 9 in. (230 mm) The extension flue pipe
(option) is available for installation in wall thickness from 9 in.
(230 mm) to 13 in. (330 mm) This provides the flexibility to
meet the installation requirements of dwellings of various wall
thicknesses up to 13 inches (330 mm).
The flue pipe assembly is a "pipe-within-a-pipe" design which
consists of two concentric tubes. Outside air is drawn
2
S E R V I C E M A N U A L
H E A T I N G
through the cylindrical space between the tubes. Combustion
by-products are vented through the inner tube.
As cool air enters the flue pipe, it is heated by the hot air
that is exiting the system.
The turbo fan is used for the combustion blower on the
intake air side only. The exhaust gas is expelled through
the flue pipe.
The blower motor assembly on Laser 560/730 is a dual
function fan with the intake air and exhaust air fans
mounted on a common shaft. Inside of the blower case
are separated into two compartments by a sealed plate.
One side is the intake air and the other is the exhaust air.
The intake fan draws in outside air through the flue pipe
for internal combustion. The exhaust fan, runs on a
common shaft with the intake fan, expels all combustion
by-products through the flue pipe.
The Laser Heater blower motor has 3-speeds. A
magnetic sensor insures proper fan speeds for each
burning mode.
The blower motor will keep running for 180 seconds
after the heater is turned off to exhaust vapor in the
system and cool off the unit.
Laser 300: 20470237 Laser 530: 20470337
Laser 560: 20470438 Laser 730: 20470638
The air circulation fan forces room air through the heat
exchanger, then out of the louvered front panel to
be distributed throughout the room. The Laser
Heater circulation fan motor has three speeds. The
circulation fan will keep running for 180 seconds after
the heater shuts down. This cools the heater.
Laser 300: 20479671 Laser 530: 20474171
Laser 560: 20475071 Laser 730: 20475171
The external tank (which generally is dealer installed)
should contain at least one shutoff valve, a fuel filter and
a vent. Installation of the tank should conform to local
regulations.
Only the Laser 560 gives the user the option of
using either the removable fuel tank (part #20475922) or

external fuel tank.

S Y S T E M S

1-12 Blower Motor Assembly

1-13 Air Circulation Fan

1-14 External Fuel Tank
Description