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5.Be sure all combustion air and ventilation open- ings are not blocked.

3H-2. Professional Inspection

In addition, annual inspections by a qualified professional technician are recommended to keep the heater operating safely and efficiently through the years. The following basic checks should be performed.

1.Check for loose or broken wires and terminal connections.

2.Verify pressure switch operation by cycling the spa pump on and off a few times. The heater should go off immediately after the pump stops.

3.Inspect the electrical controls, specifically the following:

a.High limit controls.

b.Pressure switch.

c.Temperature control.

d.Automatic gas valve.

4.Inspect the venting system for blockage, leakage, and corrosion.

5.Check for spider webs in the pilot and main burner orifices — especially at Spring startup.

6.Conduct a normal operating cycle and observe that the sequence proceeds as intended.

7.Inspect the external surfaces of the heat exchanger tubes for black carbon soot buildup by placing a mirror between and under the burners when the heater is firing. Remove any soot that has collected on the tubes, and correct the cause.

NOTE: After installation and first startup, check the heat exchanger for black carbon soot buildup after the following periods of operation: 24 hours, 7 days, 30 days, 90 days, and once every 6 months thereafter.

Proper flames appear:

a.Blue in color.

b.1 to 4 inches (25 to 102mm) high above burner surface.

SECTION 4.

Parts List for Laars Lite Heater

4A. General Information

To purchase parts or obtain a comprehensive maintenance manual for the Laars Lite heater, contact your nearest Teledyne Laars dealer or distributor. If they cannot supply you with what you need, contact the Customer Service Manager, Teledyne Laars, 6000 Condor Drive, Moorpark, California, 93021, Telephone (805) 529-2000.

4B. Parts List

Description

PartNumber

A. VENTING ASSEMBLY

 

1.

Top Enclosure Weldment

R0313201-05

2.

Top Filler Plate

10535201-05

3.

Flue Collector

R0316401-05

 

 

(R0316406-10 for Canada)

4.

Rainshield Kit

R0318301-05

 

 

(R0318311-15 for Canada)

**5.

Redundant Limit (LLG)

R0313900

6.

Drafthood Kit

10561401-05

 

 

(10561411-15 for Canada)

7.

Vent Cap Kit

10561501-05

 

 

(10561511-15 for Canada)

B. JACKET COMPONENTS

 

1.

Jacket Assy

R0316501-05

2.

Gap Closures

R0318400

3.

Door w/Latch

R0313401-05

4.

Fusible Link Assy

R0012200

5.

Pressure Switch, 2 psi

R0013200

5.

Pressure Switch, 1 psi

R0011300

5.

Pressure Switch, 1-10 psi

R0015500

6.

Tube, Siphon Loop

10545200

7.

Grommet Kit

R0316300

*8.

Ignition Control Assembly (LLD)

R0317500

C. COMBUSTION PANEL ASSEMBLY

 

1.

Chamber panel side, left/right

R0316600

2.

Chamber panel back

R0316701-05

*3.

Chamber panel front (LLD)

R0316801-05

**3.

Chamber panel front (LLG)

R0317801-05

*4.

Ignitor (LLD)

R0317200

*5.

Ignitor Assembly (LLD)

R0317400

D. HEAT EXCHANGER ASSEMBLY

 

Complete Heat Exchanger Assy

10606401-05

1.

Cast Iron Return Header

R0058300

2.

Cast Iron Inlet/Outlet Header

R0056400

3.

Bronze Return Header

R0054600

4.

Bronze Inlet/Outlet Header

R0016800

5.

Heat Exchanger, Tube Assy

R0018101-05

6.

Header Gasket Kit

R0050800

7.

Flange Assy

R0055000

8.

Cast Iron Flow Valve Assy

10701301-05

8.

Bronze Flow Valve Assy

10701401-05

9.

Bracket Heat Exchanger

10457000

10.

Baffle, Heat Exchanger, 8

10697401-05

11.

Clamp, Holddown

10726200

12.

Bracket, Holddown

10726300

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Teledyne LLD, LLG dimensions 4A. General Information, 4B. Parts List, 3H-2. Professional Inspection

LLD, LLG specifications

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