Fuel Contamination; Replacement Of Fuses; Clean The Heater; Reinstall Cleaned Components - Toyotomi Laser 300 Service Manual

Laser vented heating system

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Installation and operation instruction manual (36 pages)

Table Of Contents

Table of Contents

L A S E R

Section 3

STEP 2: Inspection and Cleaning

A. Pull the fuel strainer out of the fuel sump.

B. If the strainer is dirty (but undamaged), rinse the fuel

strainer in fresh, clean kerosene to remove all

particles. Replace the fuel strainer if necessary.

C. To drain the upper portion of the fuel sump, carefully

loosen the drain screw, there is no need to remove

(phillips head screw) which is located to the left of

strainer cover.

STEP 3: Reassembly

A. Push the new cleaned fuel strainer back into the

bottom of the fuel sump.

B. Replace both the strainer gasket and the strainer

cover if necessary.

NOTE:

Carefully align the screw holes in the gasket

and strainer cover.

C. Wipe up any spilled fuel.

NOTE:

Be sure to unscrew the drain screw to remove

all the remaining fuel from the fuel sump at the

end of each season.

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Replacement of Fuses

A short circuit or similar electrical malfunction could

cause a fuse to blow. Troubleshoot the cause of the

blown fuse.

Replace the fuse as follows:

WARNING:

Do not replace fuses while power is

"ON".

STEP 1: Removal of Fuse

A. Unplug the heater. Remove the front panel assembly.

B. Remove the fuse from fuse holder, located on the

main circuit board.

STEP 2: Installation of New Fuse

A. Install new fuses into the fuse holder. The fuses must

be a 125V, 10 amp type and a 125V, 3 amp type are

marked on the main circuit board. Do not use

oversized fuses.

B. Replace the front panel assembly and plug the heater

into the electrical outlet.

IMPORTANT:

Whenever the heater is unplugged,

t h e s e t - b a c k t i m e r m u s t b e

reprogrammed after the power is

restored.

S E R V I C E M A N U A L

H E A T I N G

Fuel contamination is often difficult to diagnose, even

though it will adversely affect the heater operation and

performance. The best course of action to take when

fuel contamination is suspected is to examine all of

the system's fuel filters, beginning with the fuel storage

tank. If a Laser kerosene lifter is part of the fueling

system, examine and clean the unit's filter, as well as

the strainer located in the fuel sump.

When it has been determined that water or some other

contaminant has infiltrated the fuel, the following

procedure should be used:

STEP 1: Remove Contamination

A. Close the fuel valve of the tank and the fusible link

B. Drain the contaminants from the external tank, or

STEP 2: Clean the Heater

A. Clean the fuel inlet strainer inside of the fuel sump.

B. Remove the front panel assembly and the fuel pump on

C. Using clean paper towels, thoroughly wipe the bottom

STEP 3: Reinstall Cleaned Components

A. Replace the components correctly and install a new

B. Open the fuel valve on the exter nal tank, the

If the problem still exists and contaminated fuel is

suspected, it can be checked.The fuel filter or the water

block filter in the fuel line is always required to minimize

any fuel contamination.

Test run the heater to see if the problem clears up, using

new clean fuel.

S Y S T E M S

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