Teledyne Electric Heater LLD User Manual

Model LLG & LLD Pool and Spa Heater  
Page 1  
operationinstructionscompletelybeforeproceeding  
SECTION 1.  
General Information  
with the installation. Consult the Teledyne Laars  
factory, or local factory representative, with any  
questions regarding this equipment. Experience has  
shown that most operating problems are caused by  
improperinstallation.  
The Laars Lite heater is design certified by  
International Approval Services (formerly American  
1A. Introduction  
This manual provides installation and operation  
instructions for the Laars Lite, Model LLG and LLD  
pool and spa heaters. Read these installation and  
VentingDimensions  
Model  
Size  
Heater  
Width  
U.S. Indoor or  
Firing Rate / Hr.  
(1,000's)  
Vent  
Diameter  
U.S.Outdoor  
Dim "H"  
CANOutdoor  
Shelter Dim "H"  
in  
(cm)  
in  
5
6
7
8
9
(cm)  
in  
(cm)  
(23)  
(24)  
(26)  
(27)  
(34)  
in  
(cm)  
BTU  
125  
175  
250  
325  
400  
(kcal)  
(31.5)  
(44.1)  
(63)  
125  
175  
250  
325  
400  
15  
(38)  
(12.7)  
(15.2)  
(17.8)  
(20.3)  
(22.9)  
9 1/8  
9 3/4  
10  
16 1/4  
24 1/8  
25 1/4  
26 1/2  
27 1/2  
(41.3)  
(61.3)  
(64.1)  
(67.3)  
(69.9)  
18  
(45.7)  
(57.2)  
(67.9)  
(80.6)  
22 1/2  
26 3/4  
31 3/4  
10 5/8  
13 1/4  
(81.9)  
(101)  
Notes:  
1. In Canada, derate BTU/Hr input and output 10 percent for altitudes of 2,000 to 4,500 feet (609 to 1372 m) above sea level.  
No derating necessary up to altitude of 2,000 feet (609 m). In United States derate input 4 percent for each 1,000 feet  
(305 m) above sea level, starting at 2,000 feet (609m).  
2. The Laars Lite is constructed for 75 psi working pressure.  
3. Ratings shown are for both natural and propane gas.  
Figure 1. General Configuration.  
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Model LLG & LLD Pool and Spa Heater  
Page 3  
ROOF JACK  
Notes:  
1. An Underwriters' Laboratories listed vent cap is required to prevent downdraft and allow the heater to function properly  
and safely.  
2. Use approved roof jack.  
Figure 2. Indoor Installation Venting (USA), or Outdoor Shelter (Canada).  
2C-1. Installation Information  
Table 1. Air Openings to Outside  
Avoid placing the heater in locations where it can  
cause damage by water or condensate leakage. If this is  
not possible, provide a suitable drain pan to catch and  
divert any leakage. The pan must not block natural  
flow of air around the heater.  
Locate the heater so the clearances from combus-  
tible surfaces shown in Table 2 are met.  
RequiredNetFreeOpenArea  
forCombustionAirOpenings  
Directfromoutside  
Duct from outside  
in2  
Model  
125  
175  
in2  
(cm2)  
(206)  
(284)  
(406)  
(429)  
(645)  
(cm2)  
(413)  
(568)  
(813)  
(1058)  
(1290)  
32  
44  
64  
88  
250  
63  
126  
164  
200  
325  
400  
82  
100  
2C-2. Outdoor Installation  
Note: If using screens and/or louvers, compensate by adding 50%  
additional area to each opening.  
Laars Lite heaters can be installed in the low-  
profile, grate top configuration (U.S.A. only) as  
received from the factory, or with an optional high  
wind vent cap/stack. Canadian units require a factory  
approved vent cap.  
2C. Site Location  
Locate the heater in an open, unroofed area. Do  
not install the heater under a deck. Do not locate the  
heater below or adjacent to any doors, glass openings,  
louvers, grills, etc., which connect in any way with an  
inhabited area of a building, even though the access  
might be through another structure (e.g., a garage or  
WARNING  
Improper installation or maintenance can  
cause nausea or asphyxiation from carbon  
monoxide in flue gases which could result in  
severe injury, or death.  
Table 2. Minimum Heater Clearances From Combustible Surfaces  
Indoor (Outdoor Shelter) Installation  
Outdoors Installation  
U.S. Canada  
U.S.  
Canada  
(
)
(
)
(
(
(
)
)
)
(
cm  
)
Side of Heater  
Blank  
inch  
6
cm  
inch  
6
cm  
inch  
6
cm  
32  
32  
inch  
6
(
(
(
)
)
)
(
)
)
)
(
15.2  
)
)
)
15.2  
15.2  
30.5  
15.2  
15.2  
45.7  
(
(
(
15.2  
Rear  
6
6
6
6
(
)
(
Piping  
12  
44  
18  
18  
44  
36  
12  
30.5  
18  
45.7  
(
)
(
)
Top  
111.7  
111.7  
Open Unroofed Area  
(
)
(
)
(
)
(
)
Front  
45.7  
91.4  
18  
45.7  
36  
91.4  
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Page 4  
utility room. In the United States there must be a  
minimum of 4 feet (1.22 m) horizontally or vertically  
between the heater and any door, glass opening, or  
gravity inlet to a building (see Figure 3).  
hollow masonry no less than 4 inches (102 millimeters  
[mm]) thick, covered with sheet metal at least 24 gauge  
thick and extending beyond the full width and depth of  
the heater by at least 6 inches (76.2 mm) in all direc-  
tions. The masonry must be laid with ends unsealed,  
and joints matched to provide free circulation of air  
from side to side through the masonry (see Figure 4). If  
the heater is installed in a carpeted alcove, the entire  
floor of the alcove must be covered by a non-combus-  
tible panel. You can obtain a non-combustible base  
from Teledyne Laars, part number 10521701-05.  
Figure 3. Outdoor Heater Installation.  
WARNING  
United States  
Do not install the heater with the top of the  
vent assembly within 4 feet (1.22 m) of any  
opening into a building.  
Canada  
Do not install the heater with the top of the  
vent assembly within 10 feet (3.05 m) of any  
opening into a building.  
If the heater is installed under an overhang, there  
must be a minimum clearance of 5 feet (1.5 m) above  
the top of the heater and the structure should not  
overhang the heater more than 12 inches (0.30 m). The  
area under the overhang must be open on three sides.  
This prevents combustion gases from being diverted  
into living areas through doors, windows, or gravity  
inlets.  
Notes:  
1. Blocks must provide solid base and be braced so they  
cannot slip out of place.  
2. Air openings in blocks must be arranged to provide  
unrestricted opening through entire width or length of  
base.  
Figure 4. Non-Combustible Platform.  
If the heater is installed close to a structure,  
protect it from rain water runoff with rain gutters on  
the roof or other measures. Do not locate the heater  
near sprinkler systems that could spray water on it.  
Avoid locations where wind deflection off nearby  
structures might cause wind loading and downdraft  
conditions. Where downdraft conditions exist, locate  
the heater at least 3 feet (0.91 m) from vertical  
surfaces (e.g., nearby buildings and walls). The  
addition of a vent cap may be necessary.  
2D. Combustion and Ventilation Air  
Supply  
All indoor installations must have openings to  
outside air for combustion, ventilation, and dilution of  
flue gases from inside the building (see Figure 2 and  
Table 1). Teledyne Laars does not recommend indoor  
installations that do not provide combustion air from  
outside the building.  
All outdoor shelter installations (Canada only)  
must have uninterrupted openings to outside air for  
combustion and ventilation. The installation must be in  
accordance with the latest edition of CAN/CGA B149.  
Teledyne Laars does not recommend outdoor shelter  
installations that depend on combustion air for com-  
bustion.  
2C-3. Flooring - Typical Installation  
Do not install the heater directly on a combus-  
tible wood or carpet floor without placing a non-  
combustible platform between the floor and the heater.  
In the United States, the National Fuel Gas Code  
allows a heater to be placed on a combustible surface  
when there is a platform under the heater made of  
If the heater is installed in a residential garage, or  
where flammable vapors will be present, the  
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Model LLG & LLD Pool and Spa Heater  
Page 5  
burners must be 18 inches (457 mm) above the garage  
floor. Refer to the latest edition of the National Fuel  
Gas Code for more information. In Canada, refer to the  
latest edition of the Gas Installation Code, CAN/CGA  
B149.  
Manual Shutoff  
Valve  
Caution  
Gas Supply  
Inlet  
Union  
Do not operate this heater outdoors at  
temperatures below 20 degrees Fahrenheit  
(°F) (-7 degrees Celsius [°C]).  
T-Fitting  
To  
Equipment  
Inlet  
3" Min.  
Nipple  
2E. Gas Supply and Piping  
Cap  
2E-1. General Instructions  
Review the following general instructions before  
continuing the installation.  
Figure 5. The proper design for a sediment trap / drip  
leg.  
5. Install a sediment trap (drip leg) ahead of the gas  
controls (see Figure 5). Fit the trap with a  
WARNING  
Do not convert this heater from natural gas to  
propane gas, or propane to natural. Field  
conversion could create carbon monoxide gas  
which can cause property damage, serious  
injury, or death.  
threaded cap which can be removed for cleaning.  
6. Install a manual gas shutoff valve for service and  
safety. Do not use a restrictive gas cock. DO  
NOT USE GAS FLEXIBLE PIPING.  
7. Disconnect the heater and its individual shutoff  
valve from the gas supply system during pressure  
testing of the system at pressures higher than 1/2  
pounds per square inch (psi) (3.45 kilopascals  
[kPa]). If the test pressure is equal to or less than  
1/2 psi (3.45 kPa), close the manual shutoff valve  
on the heater during the piping pressure test.  
1. Gas piping installation must be in accordance  
with the latest edition of ANSI Z223.1. In  
Canada, the installation must be in accordance  
with CAN- B149.1 or .2 and all local codes that  
apply.  
2. Check the rating plate to make sure the heater is  
fitted for the type of gas being used. Teledyne  
Laars heaters shipped from the factory are  
certified to operate at an altitude of 0 to 2000 feet  
(0 to 609 m), or if so ordered, at higher altitudes.  
In the United States, the heater manifold is  
marked with a tag or sticker indicating one of the  
following high altitude operation codes:  
Table 3. Natural Gas Pipe Size Requirements  
Distance from Gas Meter  
0-50 feet  
(0-15 m)  
50-100 feet  
(15-30 m)  
100-200 feet  
(30-60 m)  
Heater  
Size  
in. (mm)  
in.  
(mm)  
in.  
(mm)  
125  
3/4 (19)  
1
(25.4)  
1
(25.4)  
a. High altitude (H) - 2,000 to 6,000 feet (609 to  
1829 m)  
175  
250  
1
1
(25.4)  
1
(25.4)  
1-1/4  
1-1/4  
1-1/2  
1-1/2  
(31.75)  
(31.75)  
(38)  
(25.4) 1-1/4 (31.75)  
325 1-1/4 (31.75) 1-1/4 (31.75)  
b. High altitude (J) - 6,000 to 10,000 feet (609 to  
3048 m)  
400 1-1/4 (31.75) 1-1/2  
(38)  
(38)  
Notes:  
1. These numbers are for natural gas (0.65 Sp. Gr.) and are  
based on 1/2 inch (13 mm) water column pressure drop.  
Check supply pressure with a manometer, and local code  
requirements for variations. For liquefied petroleum gas,  
reduce pipe diameter one size, but maintain a 3/4 inch  
(13 mm) minimum diameter.  
2. Check supply pressure and local code requirements  
before preceding with work.  
3. Pipe fittings must be considered when determining gas  
pipe sizing.  
3. In Canada, the heater rating plate is marked for  
specific altitude requirements: high altitude (H) is  
2,000 to 4,500 feet (609 to 1372 m) above sea  
level.  
4. Use the figures in Table 3 to size the gas inlet  
piping from the gas meter to the heater. Check all  
local codes for compliance before installing the  
heater.  
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Page 6  
use 120 Volt, 60 Hz AC requires rewiring of the  
heater. This should be done by a certified electrician  
only, as with all wiring. To wire the heater for 120  
Volt, 60 Hz AC, follow the alternate 120V wiring  
method depicted in Figure 6. Additionally, the ignition  
control module must be rewired. The wire from the  
terminal marked IGN/240 must be removed from that  
terminal and placed on the terminal marked IGN/120.  
Electrical wiring must be in accordance with the  
latest edition of the National Electric Code (NEC),  
ANSI/National Fire Protection Association (NFPA)  
70, unless local code requirements indicate otherwise.  
Caution  
Permanent damage to the gas valve will occur  
if the following procedures are not followed.  
8. If the gas supply pressure is less than required,  
check for under-sized pipe between the meter and  
the heater, a restrictive fitting, or an undersized  
gas meter. Gas supply pressures to the heater are  
listed in Table 4.  
NOTE: The maximum inlet gas pressure must  
not exceed the specified value. The minimum value  
listed is for the purpose of input adjustment. Refer to  
Table 4.  
To wire the Laars Lite heater:  
1. Wire the heater to a 120V or 240V /60 Hertz  
(Hz) electrical source.  
Table 4. Gas Supply Pressure Requirements  
2. Connect the wires from the source to the leads on  
the right side of the heater in the space behind the  
ignition control (see Figure 8).  
Supply Pressure  
Water Column  
Natural Gas  
in. (mm)  
Propane Gas  
in. (mm)  
3. Remove the screw located to the lower right of  
the transformer and open the hinged cover.  
Minimum  
Maximum  
6
(152)  
10  
14  
(254)  
(356)  
14 (356)  
NOTE: No external junction box is required.  
9. Before operating the heater, test the complete gas  
supply system and all connections for leaks using  
a soap solution. Do not use an open flame.  
2F-2. Auxiliary Time Clock Wiring  
(LLD or LLG)  
If you install a time clock to control the filter  
pump operation, it is recommended that the time clock  
have its own low voltage (Fireman’s) switch to turn off  
the heater before turning off the pump. The switch  
should shut off the heater about 15 minutes before the  
filter pump shuts off. This will allow for a more  
efficient operation by removing any residual heat  
contained in the heat exchanger back to the pool.  
To install a time clock auxiliary switch into the  
heater wires (see Figure 9):  
Caution  
Some leak test solutions (including soap and  
water) may cause corrosion or stress cracking.  
Rinse the piping with water after testing.  
2E-2. Special Precautions for Propane  
Gas (LLG Only)  
1. Remove heater door.  
Liquefied petroleum (LP) gas is heavier than air.  
Therefore, do not install pool heaters using LP gas in  
pits or locations where gas might collect. Locate  
heaters a safe distance from LP gas storage and filling  
equipment. Consult local codes and fire protection  
authorities about specific installation restrictions.  
2. Remove the factory installed wire between  
terminals 1 and 2 on the terminal strip (see Figure  
9).  
3. Connect the wires from the time clock auxiliary  
switch to the two terminals. Use American Wire  
Gage (AWG) No. 14 gauge stranded copper wire  
with a temperature rating of 221°F (105°C) or  
greater.  
2F. Electrical Wiring  
2F-1. General Information (LLD Only)  
Wiring connections must be made exactly as  
shown in the wiring diagram found on the inside of the  
heater (see Figures 6 and 7 for typical examples) and  
must include a definite means of grounding. There is a  
bonding lug on the right side of the heater, where a  
bond wire must be attached.  
The length of the wire between the heater and the  
time clock should not exceed 10-15 feet (4.57 m). The  
contact points of the time clock switch should be silver,  
or a low resistance alloy.  
2F-3. Remote Operation  
(Model LLD Only)  
The Laars Lite pool/spa heater controls can  
The heater comes factory-wired intended for use  
with 240 Volt, 60 Hz AC field electrical supply. To  
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Model LLG & LLD Pool and Spa Heater  
Page 7  
Figure 6. LLD Connection/Schematic Wiring Diagram.  
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Page 8  
be wired for remote operation. The CS-02 remote  
control permits switching from one temperature  
controller to the other and turning the heater on and  
off from a remote location. The CS-04 includes the  
same features as the CS-02 plus a remote tempera-  
ture controller. Contact Teledyne Laars for further  
information. Reference part numbers CS-02 and  
CS-04.  
An interrupt (on/off) type remote can be  
connected by removing the jumper wire on the terminal  
block located in the control compartment (see  
Figure 6) and connecting the two wires from the  
remote to the two terminals on the terminal block. This  
type of remote control will turn the heater on or off,  
but will not switch between the two temperature  
controllers on the Flex-Temp control panel.  
Figure 7. LLG Connection/Schematic Wiring Diagram  
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Model LLG & LLD Pool and Spa Heater  
Page 9  
Figure 8. Field Wiring Connections (LLD).  
Figure 10. Piping installation.  
Figure 9. Time Clock Wiring.  
To connect a 3-wire remote (not supplied by  
Teledyne Laars), order a wire harness assembly (part  
No. E0120000) which connects to the flex-temp  
control panel. Installation instructions are included  
with the wire harness assembly.  
Consult with Teledyne Laars Service Department  
with questions about installing remotes other than  
Teledyne Laars.  
2G. Water Flow System  
2G-1. Flange Installation  
The heater has 2" universal header couplings.  
You can connect threaded 2" iron pipe, unthreaded  
1-1/2" iron pipe, 1-1/2" or 2" copper pipe without an  
adapter (see Figure 10).  
Plastic piping (PVC Schedule 40) can be con-  
nected to the heater if local codes allow it, by using the  
CPVC nipples included with your heater.  
Figure 11. Plastic piping connections.  
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To install plastic piping (see Figure 11):  
2G-2. Reversible Water Connections  
Teledyne Laars ships the Laars Lite heater with  
the water connections on the right side. The Laars Lite  
heater can be installed with the water connections on  
either side. It could be necessary, or helpful, to switch  
the connections to the left side to improve access for  
installation service. Perform this modification before  
installing the heater using the following procedures:  
1. Remove CPVC nipples from plastic bag.  
2. Screw CPVC nipples into metal flange until tight,  
using teflon tape on plastic threads.  
3. Attach PVC plumbing to CPVC pipes using PVC  
to CPVC cement only.  
1. Remove heater door.  
2. If there is a vent cap or drafthood (indoor) on top  
of the heater, remove it.  
3. Remove all hex-head screws fastening the top and  
lift the top assembly straight up (see Figure 12).  
4. Remove rainshield assembly and set it aside.  
5. Remove screws that fasten the gap closures and  
put them aside. Remove gap closures.  
6. Remove the fiberglass insulation and insulation  
retainer covering header sensors (see Figure 14).  
7. Disconnect the two yellow leads (Model LLG  
only) from the redundant limit fuse located on the  
flue collector (see Figure 12).  
8. Remove the screws securing the two flue collec-  
tor holddown clamps and remove the clamps (see  
Figure 13). Remove flue collector.  
9. Remove the three jacket/plug grommets and drain  
plugs (see Figure 12). One set is located under  
the water connections on the right side. The other  
is on the left side toward the front of the heater.  
10. Tag and disconnect the white wire on the pressure  
switch (PS) and the white wire on the Fireman's  
switch terminal (see Figure 6 or 7) which leads to  
the high limit switch.  
11. Remove plastic tie wraps and pull the white wires  
out of the front compartment through the vesti-  
bule cover and coil them on the heat exchanger.  
C LA M P  
IN/O U T H E AD E R  
B R AC K ET  
Figure 12. Heat exchanger reversal.  
Figure 13. Flue collector holddown brackets.  
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Page 11  
HeatExchanger  
End Baffles  
HeatExchanger  
Combustion  
ChamberWall  
Figure 16. Heat exchanger and end baffles.  
Figure 14. Temperature sensing bulb.  
Caution  
It may be necessary to have help lifting the  
heat exchanger out and replacing it.  
15. Lift out the heat exchanger assembly and set it  
aside. Re-install heat exchanger 180 degrees from  
it's original position (header left).  
LEFT  
VESTIBULE  
COVER  
RIGHT  
VESTIBULE  
COVER  
16. When replacing the heat exchanger from the  
heater, the end baffles must be replaced. Each  
one is held in place by two screws which mount  
to the top of the combustion chamber wall.  
Reinstall the baffles on the front and rear of the  
heat exchanger before continuing with the  
"Reversible Water Connections" procedure.  
FRONT  
PLASTIC BUSHING  
17. Remove the plastic bushing from the hole on the  
right side of vestibule cover. Re-install it in the  
hole on the left vestibule cover.  
Figure 15. Vestibule covers.  
12. Unscrew the brass compression fitting securing  
the pressure switch. Remove tube from header  
and gently bend it out of the way.  
18. Re-route pressure switch tube and thermostat  
bulb assembly through hole in left side of (vesti-  
bule) cover in reverse order.  
13. Loosen the screw securing the temperature sensing  
bulb retainer bracket. Slide the retainer bracket off  
the bulb flange and remove the bulb from the header  
(see Figure 14). Pull pressure switch tube through  
vestibule cover hole first, then pull thermostat bulb  
assembly through same hole.  
19. Remove pressure switch retainer from vestibule  
panel (allow pressure switch to float).  
20. Re-install the temperature sensing bulb in the  
header, and fasten it with the retainer bracket and  
screw.  
14. When removing the heat exchanger from the  
heater, the end baffles of the heat exchanger must  
be removed. There are two baffles covering part  
of the front and rear tubes of the heat exchanger.  
Each baffle is held in place by two screws which  
mount to the top of the combustion chamber wall.  
Remove the screws and the baffles before at-  
tempting to lift the heat exchanger out of the  
heater.  
21. Re-install the compression fitting at end of  
pressure switch line into header.  
22. Route the white wiring beside the heat exchanger  
and down to the original location. Be careful to  
keep the wires away from the flue collector.  
Secure white wires to the pressure switch tube  
with tie straps.  
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Page 12  
23. Connect the white wire labeled PS to the pressure  
switch and the other white wire to its original  
location on the Fireman's switch.  
injector to prevent ozone and air from entering  
the heater.  
When chemical feeders are used, plumb the  
feeder downstream of the heater and install an  
inline check valve between the heater and the  
feeder (a minimum of 18" is required between the  
heater and the check valve).  
24. Replace jacket/plugs grommets, and re-install the  
drain plugs. Tighten securely.  
25. Install the flue collector assembly. Be sure the  
bottom lips are inside the grooves on the front  
and rear tile covers and are not pinching any  
wires.  
Never deposit chemicals directly in the pool  
skimmer.  
2G-5. Pressure Relief Valve  
A pressure relief valve is not furnished with the  
26. Reconnect yellow wires (Model LLG only) to  
redundant limit fuse on the flue collector.  
Laars Lite heater, except in Canada, however, it is  
recommended and may be required by local codes.  
To install a pressure relief valve, remove the 3/4  
inch (19 mm) brass plug on the in/out header with the  
valve (see Figure 16). The setting of the valve should  
be at or below the lowest working pressure of filter  
systemcomponents.  
27. Attach the flue collector holddown clamps to the  
clips located under the two center header bolts.  
28. Replace the gap closures and tighten the screws  
securely.  
29. Re-cover the header sensors with fiberglass  
insulation, and replace the insulation retainer.  
2G-6. Adjusting the Pressure Switch  
30. Double-check to make sure the wiring is not  
pinched against sharp edges, or resting on the flue  
collectorassembly.  
Caution  
The pressure switch should be adjusted to turn  
the heater off when the pump is off. Setting  
the switch to close at too low of a flow can  
damage the appliance. Adjust the switch to  
turn the heater off, not on.  
31. Re-install rainshield assembly.  
32. Replace the top assembly. Make sure the tabs are  
outside the heater jacket. Fasten the top assembly  
with the hex-head screws.  
The pressure switch is preset at the factory for  
activation at 2 psi (14 kPa). Adjust the pressure switch  
only if any part of the filter system piping is 3 feet  
(0.91 m) or more above the top of the heater jacket.  
Do not adjust the pressure switch if the heater is  
installed more than 15 feet (4.57 m) below or 6 feet  
(1.83 m) above the pool surface. Consult your local  
Teledyne Laars representative for recommendations.  
On some installations, the piping from the heater  
to the pool is very short. The back pressure could be  
too low to trigger the pressure switch. If this happens,  
it may be necessary to install a directional fitting or  
elbows where the return line enters the pool. This will  
increase back pressure enough for the heater to operate  
properly.  
33. Install plastic tie wraps on wiring.  
34. Install heater door.  
35. Reinstall the vent cap or drafthood, if one was  
removed.  
2G-3. Check Valve Installation  
Install a check valve if there is any chance of back-  
siphoning when the pump stops. Do not install any other  
valve in the piping between the heater outlet and the  
pool, unless it is being used as a diverter valve.  
2G-4. Chlorinators, Ozone Generators,  
and Sanitizing Chemicals  
Make sure the pool filter is clean before making  
any pressure switch adjustment: A dirty filter will  
restrict the water flow and the pressure switch cannot  
be adjusted properly. To adjust the pressure switch:  
The Teledyne Laars Lite heater is manufactured  
with materials that are not compatible with high  
concentrations of ozone, chlorine, bromine, or other  
sanitizing chemicals. Heater damage caused by exces-  
sive chemicals or improper ozonation is not covered by  
the Teledyne Laars warranty. Be sure to adhere to the  
following:  
1. Turn the control panel rotary switch to OFF (see  
Figure 17).  
2. Turn filter pump on. If a two-speed pump is used,  
make sure it is at high speed.  
When ozone is injected upstream of the heater,  
install an offgas mixing chamber, or an ozone  
bypass system between the heater and the ozone  
(NOTE: Heater should not be allowed to fire on  
lowspeed).  
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Model LLG & LLD Pool and Spa Heater  
Page 13  
3. Turn rotary switch to ON. Heater should start.  
4. Pry out the top rubber dirt plug.  
5. Use a 7/32 inch (5.55 mm) Allen wrench to turn  
the adjustment screw very slowly clockwise until  
the heater goes off (see Figure 18).  
6. Slowly turn the pressure switch adjustment screw  
counter-clockwise one-quarter turn. The heater  
should come back on.  
7. Check the adjustment by turning the filter pump  
OFF. The heater should shut off immediately. If  
it does not, restart the filter pump and repeat  
Steps 6 and 7. Check the adjustment again.  
8. Return the pool temperature control to the desired  
temperature.  
2G-7. Automatic Flow Control Valve  
The automatic flow control valve maintains the  
proper flow through the heater at rates up to approxi-  
mately 125 Gallons Per Minute (GPM) (474 liters per  
minute [LPM]). If the system filter-flow rate is higher  
than approximately 125 GPM (474 LPM), install a  
manual bypass valve (see Figure 18), then perform a  
temperature rise test (see Section 2G-8) and adjust the  
flow with the bypass valve until the proper temperature  
rise is obtained.  
Figure 17. Thermometer and pressure relief valve.  
10. Subtract the first temperature reading (cold  
water) from the second temperature reading  
(heated water). The difference between the two  
readings is the temperature rise. The temperature  
rise should be within the range shown in Table 6.  
Table 6. Temperature Rise and Minimum Flow Rates  
Minimum  
Minimum  
Maximum  
Size  
GPM (LPM)  
°F  
(°C)  
°F  
(°C)  
2G-8. Temperature Rise  
A temperature rise test confirms proper water  
flow through the heater. The temperature rise is the  
difference between the temperature of the pool or spa  
water before and after heating, as measured in the  
header. Perform the following temperature rise test  
when the installation is complete:  
125  
175  
250  
325  
400  
20  
20  
25  
30  
30  
(76)  
27  
33  
33  
28  
30  
(15)  
(19)  
(19)  
(16)  
(17)  
36  
42  
42  
38  
39  
(20)  
(24)  
(24)  
(21)  
(22)  
(76)  
(95)  
(114)  
(114)  
11. If the temperature rise is below the minimum  
range indicated, two possibilities arise:  
1. Make sure the pool filter is clean.  
2. Set the rotary switch on the temperature control  
panel (see Figure 17) to OFF.  
a. The supply gas volume is too low.  
b. The system's water flow exceeds 125 GPM  
(474 LPM), and requires a manual bypass  
valve for proper operation (see Figure 19).  
3. Turn the filter pump off.  
4. Remove the drain plug located on the right-hand  
side of the heater and replace it with a Pete's plug  
(see Figure 16).  
12. If the temperature rise is above the maximum,  
there is not enough water flowing through the  
heater. Check for clogging in the water filter or  
restriction in the water pipes.  
5. Insert a pocket thermometer (see Figure 16)  
through the Pete's plug into the header.  
6. Turn the filter pump on and wait 3 minutes. The  
heater is turned off.  
Caution  
Operation with the temperature rise above  
maximum or below the minimum can damage  
the heater and may void the warranty.  
7. Record the temperature indicated by the ther-  
mometer (cold water).  
8. Turn the heater ON following the lighting in-  
structions found on the inside of the heater.  
13. If the temperature rise is within the correct range,  
complete the procedure as follows:  
9. Allow the heater to run for about 3 minutes.  
Record the new temperature reading (heated  
water).  
a. Turn heater off.  
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Page 14  
test (see Section 2G-8).  
7. Open manual bypass valve until temp rise falls  
between the min. and max. range.  
8. Once the temperature is within the correct range,  
safety wire handle of the manual bypass valve in  
place and tag valve to prevent change in the water  
low.  
SECTION 3.  
a) Model LLD Temperature Control  
Operating Instructions  
3A. General Information  
With any new pool or spa installation, operate the  
filter pump with the heater off long enough to com-  
pletely clean the water. This will remove any installation  
residue from the water. Clean the filter at the end of this  
operation before starting the heater. When raising the  
temperature of a cold pool, remove all time clock  
settings. This lets the filter system and heater operate  
continuously until the water reaches the temperature  
setting on the temperature control. When that happens,  
the heater will automatically shut off, but the filter pump  
will keep running.  
b) Model LLG Temperature Control  
Figure 18. Temperature controls.  
WARNINGS  
Vent pipes, drafthoods, and heater tops get hot!  
These surfaces can cause serious burns. Do not  
touch these surfaces while the heater is in  
operation. Adding a vent cap reduces the  
temperature on the top.  
For your safety, when starting the heater, keep  
your head and face well away from the lower  
firebox opening to prevent any risk of personal  
injury.  
Keep all objects off the top of the heater. Blocking  
air flow could damage the heater, and may void  
the warranty.  
Figure 19. Pressure switch adjustment.  
b. Wait 3 minutes, turn filter pump off.  
c. Remove thermometer and Pete's plug.  
d. Replace the drain plug.  
3B. Lighting and Shutdown Procedures  
NOTE: If your LP tank runs out of fuel, turn off  
gas at the heater. After the tank is refilled, the heater  
must be re-lit following the instructions found on the  
inside of the heater. DO NOT attempt repairs on the  
gas control or heater. Tampering is dangerous and  
voids all warranties.  
2G-9. Adjusting the Manual Bypass Valve  
After the manual bypass valve is installed, use  
the following procedures to adjust the bypass valve:  
1. Clean pool filter.  
2. Remove drain plug located on right-hand side of  
heater and replace it with a Pete's plug.  
3B-1. Model LLD (see Page 15).  
3B-2. Model LLG (see Page 16).  
3. Insert a pocket thermometer (see Figure 16)  
through the Pete's plug into the header.  
4. Close manual bypass valve.  
5. Turn rotary switch to OFF position.  
6. Repeat steps 6 through 12 of the temperature rise  
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Model LLG & LLD Pool and Spa Heater  
Page 15  
3B-1. Model LLD (Direct Ignition)  
FOR YOUR SAFETY READ BEFORE OPERATING  
WARNING: If you do not follow these instructions exactly, a fire or explosion  
may result, causing property damage, personal injury or loss of life.  
A. This appliance does not have a pilot light. It is  
equipped with an ignition device which  
automatically lights the heater. Do NOT try to  
light the burners by hand.  
• If you cannot reach your gas supplier, call  
the fire department.  
C. Use only your hand to push in or turn the  
gas control knob. Never use tools. If the  
knob will not push in or turn by hand, don't  
try to repair it, call a qualified service  
technician. Force or attempted repair may  
result in a fire or explosion.  
B. BEFORE OPERATING, smell all around the  
appliance area for gas. Be sure to smell next  
to the floor because some gas is heavier than  
air and will settle on the floor.  
WHAT TO DO IF YOU SMELL GAS  
• Do not try to light any appliance  
D. Do not use this appliance if any part has  
been under water. Immediately call a  
qualified service technician to inspect the  
appliance and to replace any part of the  
control system and any gas control which  
has been under water.  
• Do not touch any electric switch; do not  
use any phone in your building.  
• Immediately call your gas supplier from a  
neighbor's phone. Follow the gas  
supplier's instructions.  
OPERATING INSTRUCTIONS  
1. STOP! Read the safety information above on  
this label.  
9. Replace control access panel  
10. Turn on all electric power to appliance.  
2. Set the thermostat to lowest setting and turn  
appliance switch to "OFF".  
3. Turn off all electric power to the appliance.  
11. Set thermostat to desired setting and turn  
appliance switch from "OFF" to either  
"POOL" or "SPA".  
4. This appliance is equipped with an ignition  
device which automatically lights the heater.  
Do not try to light the burners by hand.  
12. If the appliance will not operate, check that  
the filter pump is on, the filter is clean and  
water is flowing to the pool. Otherwise, follow  
the instructions "To Turn Off Gas To  
Appliance" and call your service technician  
or gas supplier.  
5. Remove the heater door.  
6. Turn gas control knob clockwise  
"OFF".  
to  
7. Wait five (5) minutes to clear out any gas.  
Then smell for gas, including near the floor. If  
you smell gas, STOP! Follow "B" in the safety  
information above on this label. If you don't  
smell gas, go to next step.  
8. Turn gas control knob counterclockwise  
to "ON".  
TO TURN OFF GAS TO APPLIANCE  
1. Set the thermostat to lowest setting and turn  
appliance switch to "OFF".  
3. Turn gas control knob clockwise  
"OFF".  
to  
2. Turn off all electric power to the appliance if  
service is to be performed.  
4. Replace control access panel.  
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Page 16  
3B-2. Model LLG (Standing Pilot)  
FOR YOUR SAFETY READ BEFORE OPERATING  
WARNING: If you do not follow these instructions exactly, a  
fire or explosion may result causing property damage, personal  
injury or loss of life.  
A. This appliance has a pilot which must be  
lighted by a push button sparker. When  
lighting the pilot, follow these instructions  
exactly.  
• If you cannot reach your gas supplier, call  
the fire department.  
C. Use only your hand to push in or turn the gas  
control knob. Never use tools. If the knob will  
not push in or turn by hand, don't try to  
repair it. Call a qualified service technician.  
Force or attempted repair may result in a fire  
or explosion.  
B. BEFORE LIGHTING, smell all around the  
appliance area for gas. Be sure to smell next  
to the floor because some gas is heavier than  
air and will settle on the floor.  
WHAT TO DO IF YOU SMELL GAS  
• Do not try to light any appliance.  
D. Do not use this appliance if any part has been  
under water. Immediately call a qualified  
service technician to inspect the appliance  
and to replace any part of the control system  
and any gas control which has been under  
water.  
• Do not touch any electric switch; do not  
use any phone in your building.  
• Immediately call your gas supplier from a  
neighbor's phone. Follow the gas  
supplier's instructions.  
OPERATING INSTRUCTIONS  
1. STOP! Read the safety information above.  
7. Push the button of the sparker, repeating until  
confirming that pilot lights, by observing  
reflection on burner tray mirror.  
2. Set the thermostat to lowest setting and turn  
appliance ON/OFF switch to "OFF".  
8. Continue to hold the control knob down for  
about one (1) minute after the pilot is lit. If it  
goes out, repeat steps 3 through 8.  
3. Turn gas control knob clockwise  
stops at "OFF" position.  
until it  
4. Wait five (5) minutes to clear out any gas. If  
you then smell gas, STOP! Follow "B" in the  
safety information above. If you don't smell  
• If knob does not pop out when released, stop  
and immediately call your service technician  
or gas supplier.  
PILOT  
gas go to the next step.  
BURNER  
• If the pilot will not stay lit after several tries,  
turn the gas control knob to "OFF" and call  
your service technician or gas supplier.  
5. To find pilot—follow gas line  
from gas valve to pilot  
location.  
9. Turn gas control knob counterclockwise  
to "ON".  
6. Turn knob on gas valve  
counterclockwise  
to  
"PILOT" then push control  
knob all the way and hold down.  
10. After replacing control compartment access  
panel, set thermostat to desired setting and  
turn appliance ON/OFF switch to "ON". Valve  
has built-in delay before coming on.  
TO VALVE  
11. If the appliance will not operate, check that the  
filter pump is on, that the filter is clean and  
water is flowing to the pool. Otherwise, follow  
the instructions "To Turn Off Gas To  
Appliance" and call your service technician or  
gas supplier.  
TO TURN OFF GAS TO APPLIANCE  
1. Set the thermostat to lowest setting and turn  
appliance ON/OFF switch to "OFF".  
2. Turn gas control knob clockwise  
until it  
stops at "PILOT". Then press down slightly on  
knob while turning clockwise  
not force.  
to "OFF". Do  
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Model LLG & LLD Pool and Spa Heater  
Page 17  
Note: When using metal pipe as heat sink, join metal and PVC/CPVC, using metal male and PVC/CPVC female connection.  
Figure 20. Typical installation.  
If the heater is not going to be used for a long  
period of time, shut it down completely. Follow the  
instructions found on the inside of the heater.  
calibrated at the factory and covers a range from  
3C. Setting the Temperature Control  
The temperature control (see Figure 17) is  
approximately 70 to 104°F (21 to 40°C). Use an  
accurate pool thermometer to determine the best water  
3D-2. Winterizing  
In areas where freezing temperatures occur in  
temperature for your uses.  
winter, and the pool or spa will not be used, have your  
The Laars Lite model LLD has dual temperature  
service technician perform the following steps:  
controls, which allows two different temperature  
1.  
Turn off the main gas supply valve to the  
heater, outside the heater jacket.  
settings, selected by the rotary switch in the middle of  
the panel. One control can be set for normal use and  
the other for standby; or one can be set for pool and  
the other for a spa. Placing the rotary switch in the  
middle turns off the heater (see Figure 17). The model  
LLG has only a single control and is set similar to the  
LLD above.  
IMPORTANT: The temperature controls cannot  
be calibrated in the field. If the control is faulty, shut  
down the heater and have a qualified service technician  
replace the control. DO NOT use the thermostat switch  
to completely shut down the heater.  
2. Remove heater door.  
3. Shut down the heater following the shutdown  
instructions found on the inside of the heater.  
4. Remove the drain plug from the return side (see  
Figure 20), loosen the drain plug from the inlet-  
outlet side, and completely drain the heater before  
the first frost.  
5. After all water has drained from the heater,  
remove the drain plug from the inlet/outlet side.  
Check for mineral buildup in the openings.  
3D. Seasonal Care  
6. Use compressed air to blow out any standing  
water remaining in the heat exchanger.  
3D-1. Spring and Fall Operation  
During periods when the pool is only going to be  
used occasionally, turn the temperature control down  
to the MIN setting. This prevents the pool from water  
from becoming chilled, and maximizes the time re-  
quired to raise the pool water back up to the desired  
temperature.  
7. Grease the threads in the drain plugs and reinstall  
plugs, but do not tighten.  
8. Disconnect the pressure switch copper tubing (see  
Figure 21).  
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Page 18  
2. The drinking of alcoholic beverages before or  
during spa or hot tub use can cause drowsiness  
which could lead to unconsciousness, and subse-  
quently result in drowning.  
3D-3. Spring Start-up  
To restart the heater in the Spring, have a profes-  
sional service technician reassemble the heater as  
follows:  
1. Attach the copper tubing to the pressure switch  
and fill the loop with SAE 50, non-detergent oil  
(see Figure 21).  
3. Pregnant women take note! Soaking in water  
above 102°F (38.5°C) can cause fetal damage  
during the first three months of pregnancy (which  
could result in the birth of a brain-damaged or  
deformed child). If pregnant women are going to  
use a spa or hot tub, they should make sure the  
water temperature is below 100°F (38°C) maxi-  
mum.  
2. Tighten the drain plugs.  
3. Turn on the main gas supply valve to the heater,  
outside the heater jacket.  
4. Turn on the heater following the lighting instruc-  
tions found on the inside of the heater.  
4. The water temperature should always be checked  
with an accurate thermometer before entering a  
spa or hot tub. Temperature controls may vary by  
as much as 4°F (-16°C).  
3E. Water Chemistry  
Proper chemical balances are necessary for  
sanitary bathing conditions as well as ensuring your  
heater's long life. Be sure to keep your chemical levels  
within the values indicated in Table 7. Teledyne Laars  
does not warrant heat exchangers damaged by corro-  
sive chemical levels or excess dissolved solids in pool  
or spa water.  
5. Persons with a medical history of heart disease,  
diabetes, circulatory or blood pressure problems  
should consult their physician before using a hot  
tub or spa.  
6. Persons taking any medication which induces  
For spas, it is also necessary to perform water  
changes in addition to chemical treatment. It is recom-  
mended to change the spa water every 60 days for light  
usage and every 30 days if usage is heavy.  
3F. Spa/Hot Tub Safety Rules  
WARNING  
The following “Safety Rules for Hot Tubs,”  
recommended by the U.S. Consumer Product  
Safety Commission, should be observed when  
using the spa.  
1. Spa or hot tube water temperature should never  
exceed 104°F (40°C). One hundred degrees  
Fahrenheit (100°F [38°C]) is considered safe for  
a healthy adult. Special caution is recommended  
for young children.  
Figure 22. Pressure switch copper tubing.  
Figure 21. Heater drain locations.  
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Model LLG & LLD Pool and Spa Heater  
Page 19  
drowsiness (e.g., tranquilizers, antihistamines, or  
anticoagulants) should not use spas or hot tubs.  
discourage further adjustments.  
4. Set the filter time clock to start the pump no  
earlier than 6:00 AM during the pool heating  
season. This is the time when nightly heat loss  
balances.  
7. Prolonged immersion in hot water can induce  
hyperthermia.  
Hyperthermia occurs when the internal body  
temperature reaches a level several degrees above the  
normal body temperature of 98.6°F (37°C). Symptoms  
include dizziness, fainting, drowsiness, lethargy, and  
an increase in the internal body temperature. The  
effects of hyperthermia include:  
5. If the pool is only going to be used on weekends,  
reduce the heater temperature control setting by 8  
or 10 degrees during the week. Reset it to the  
78°F (25°C) level a day or so before you plan to  
use the pool.  
6. During the winter or when on vacation for longer  
than a week, shut down the heater by following  
the shut-down instructions found on the inside of  
the heater.  
Lack of awareness of impending hazard  
Failure to perceive heat  
Failure to recognize need to leave spa  
Physical inability to leave spa  
Fetal damage in pregnant women  
7. Where possible, shelter the pool from prevailing  
winds with well-trimmed hedges or other land-  
scaping, cabanas, or fencing.  
Unconsciousness resulting in a danger of drown-  
ing  
8. Always use a pool cover when practical. Besides  
providing a valuable safety feature, a pool cover  
will reduce heat loss, conserve chemicals, and  
reduce the load on filter systems.  
3G. Swimming Pool Energy Saving Tips  
Teledyne Laars offers the following recommen-  
dations to help conserve fuel and minimize the cost of  
3H. Periodic Inspection  
Table 7. Mineral Concentration Levels  
WARNING  
Test  
Recommended Level  
Improper installation or maintenance can  
cause nausea or asphyxiation from carbon  
monoxide in flue gases which could result in  
severe injury, or death.  
Free chlorine  
Bromine  
1.0 to 3.0 ppm  
3.0 to 5.0 ppm  
7.2 to 7.8  
pH  
3H-1. Owner Inspection  
Total alkalinity (TA)  
Calcium hardness (CH)  
80 to 120 ppm  
200 to 400 ppm  
Teledyne Laars designs and constructs the Laars  
Lite heater to provide long performance life when  
installed and operated properly under normal condi-  
tions. The following basic guidelines are suggested for  
yourinspection:  
Langelier saturation index (LSI) -0.5 to +0.5  
Total dissolved solids (TDS)  
Cyanuric acid  
Less than 2000 ppm  
30 to 150 ppm  
0 ppm  
Copper  
1. Keep the top and surrounding area of the heater  
clear of all debris.  
operating your pool heater without sacrificing com-  
fort.  
2. Keep the heater area clean and free of all com-  
bustible materials, flammable liquids and vapors,  
as well as sanitization chemicals.  
1. The American Red Cross recommends a maxi-  
mum water temperature of 78°F (25°C). Use an  
accurate pool thermometer. A difference of 4  
degrees, from 78 to 82°F (25 to 28°C), will use  
as much as 40% more gas.  
3. Do not use the heater if any part has been under  
water. Immediately call a qualified professional  
technician to inspect the heater and replace any  
part of the control system which has been sub-  
merged.  
2. Carefully monitor the water temperature of your  
pool in the summertime. You can reduce heater  
usage due to warmer air temperatures.  
4. If the heater is equipped with a pressure relief  
valve, check for corrosion and make sure that  
water runs freely through it. If corrosion is found,  
replace the pressure relief valve.  
3. Find the proper setting on the pool heater tem-  
perature control and use the TEMP-LOK to  
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Page 20  
5. Be sure all combustion air and ventilation open-  
ings are not blocked.  
SECTION 4.  
Parts List for Laars Lite Heater  
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.  
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.  
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.  
4B. Parts List  
Description  
PartNumber  
A. VENTINGASSEMBLY  
1. TopEnclosureWeldment ................................... R0313201-05  
2. TopFillerPlate .................................................... 10535201-05  
3. FlueCollector ..................................................... R0316401-05  
(R0316406-10 for Canada)  
4. RainshieldKit ..................................................... R0318301-05  
(R0318311-15forCanada)  
3. Inspect the electrical controls, specifically the  
following:  
a. High limit controls.  
b. Pressure switch.  
**5. RedundantLimit(LLG) ............................................ R0313900  
6. DrafthoodKit ....................................................... 10561401-05  
(10561411-15forCanada)  
c. Temperature control.  
d. Automatic gas valve.  
7. Vent Cap Kit ........................................................10561501-05  
(10561511-15forCanada)  
4. Inspect the venting system for blockage,  
leakage, and corrosion.  
B. JACKETCOMPONENTS  
5. Check for spider webs in the pilot and main  
burner orifices — especially at Spring startup.  
1. JacketAssy ........................................................ R0316501-05  
2. GapClosures .......................................................... R0318400  
3. Doorw/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,SiphonLoop ................................................... 10545200  
7. GrommetKit ............................................................ R0316300  
*8. IgnitionControlAssembly(LLD) .............................. R0317500  
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.  
C. COMBUSTIONPANELASSEMBLY  
1. Chamberpanelside,left/right .................................. R0316600  
2. Chamberpanelback........................................... R0316701-05  
*3. Chamberpanelfront(LLD) ................................. R0316801-05  
**3. Chamberpanelfront(LLG) ................................. R0317801-05  
*4. Ignitor(LLD) ............................................................ R0317200  
*5. IgnitorAssembly(LLD) ............................................ R0317400  
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.  
D. HEATEXCHANGERASSEMBLY  
CompleteHeatExchangerAssy ................................. 10606401-05  
1. CastIronReturnHeader.......................................... R0058300  
2. CastIronInlet/OutletHeader ................................... R0056400  
3. BronzeReturnHeader ............................................. R0054600  
4. BronzeInlet/OutletHeader ...................................... R0016800  
5. HeatExchanger,TubeAssy ............................... R0018101-05  
6. HeaderGasketKit ................................................... R0050800  
7. FlangeAssy ............................................................ R0055000  
8. Cast Iron Flow Valve Assy ................................... 10701301-05  
8. BronzeFlowValveAssy ...................................... 10701401-05  
9. BracketHeatExchanger ........................................... 10457000  
10. Baffle,HeatExchanger,8 .................................... 10697401-05  
11. Clamp,Holddown ..................................................... 10726200  
12. Bracket,Holddown ................................................... 10726300  
Proper flames appear:  
a. Blue in color.  
b. 1 to 4 inches (25 to 102mm) high above  
burner surface.  
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Model LLG & LLD Pool and Spa Heater  
Page 21  
Description  
PartNumber  
13. Bracket,InsulationRetainer ...................................... 10462200  
14. Sleeve,TemperatureControlBulb ............................ 10444900  
15. RetainerBracket ....................................................... 10447300  
16. Wire Harness, High Limit ......................................... 10419300  
17. Disc, High Limit 150°F (see Note 1) ........................ R0023000  
18. Disc, High Limit 135°F (see Note 1) ........................ R0022700  
19. ConnectorFitting ..................................................... P0019700  
20. Plug 3/4 NPT........................................................... P0027000  
21. Plug 1/4 NPT........................................................... P0026800  
*E. BURNERTRAYASSEMBLY(LLD)  
BurnerTrayAssembly, Nat ....................................... R0316901-05  
Burner Tray Assembly, LP ....................................... R0319501-05  
1. BurnerTrayWeldment ....................................... R0317001-05  
2. Burner ...................................................................... L0052300  
3. GasValve,Nat ........................................................ R0317100  
3. GasValve, LP ......................................................... R0319600  
**E.BURNERTRAYASSEMBLY(LLG)  
BurnerTrayAssembly, Nat ....................................... R0098601-05  
BurnerTrayAssembly, LP ........................................ R0098701-05  
1. BurnerTrayWeldment ....................................... R0099501-05  
2. Burner ...................................................................... L0052300  
3. GasValve, LP ......................................................... R0096900  
3. GasValve,Nat ........................................................ R0096400  
4. Pilot Main Burner Assy LP ....................................... R0099200  
4. PilotMainBurnerAssyNat ....................................... R0099100  
5. Pilot, Burner, LP, .010 ............................................. R0096600  
5. Pilot,Burner,Nat,.018 ............................................. R0096700  
6. PilotGenerator ....................................................... W0036901  
7. CeramicInsulatorAssy ........................................... R0099300  
8. HighVoltageLeadAssy .......................................... R0098900  
9. PilotTube ................................................................ R0096300  
10. PiezoLighterAssy ................................................... R0096800  
F.TEMPERATURECONTROLASSEMBLY  
**1. TemperatureControl(LLG) ..................................... R0058200  
2. Knob,Thermostat .................................................... R0313800  
*1. TemperatureControl(LLD) ...................................... R0011700  
2. Knob,Thermostat .................................................... R0313800  
OPTIONALEQUIPMENT  
NonCombustibleBase ................................................ 10512701-05  
Pressure Relief Valve, 3/4NPT, 75 PSI ............................ A0063300  
1. Items 17 & 18 available as Assembly R00232.  
NOTE:  
*-LLD (Direct Ignition)  
**-LLG (Standing Pilot)  
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Page 22  
A2  
A1  
A4  
A3  
B2  
A5  
RedundantLimit  
(LLG only)  
D
See Page 23  
for detail  
B1  
F
B3  
B4  
E10  
B8  
C1  
C2  
C3  
C5  
C4  
E
See Page 23  
for detail  
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Model LLG & LLD Pool and Spa Heater  
Page 23  
Detailed view of LLG Burner Tray Assembly (E)  
E2  
E3  
E1  
E4, E5, E6,  
E7, E8, E9  
Detailed view of Heat Exchanger Assembly (D)  
D1, D3  
D20  
D11  
D5, D6  
D12  
D19  
D2, D4  
D8, D9  
D7  
D10  
D18  
D14,D15,  
D16,D17  
D13  
E2  
E3  
E1  
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Page 24  
NOTES  
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LAARS LITE  
LIMITED WARRANTY  
Your Laars Lite pool/spa heater is backed by this double warranty  
to assure your complete satisfaction.  
1. Controls, copper heat exchanger tubes, and combustion chamber panels are warranted  
against defects in materials and workmanship for two (2) years from date of purchase.  
2. All other parts are warranted against defects in materials and workmanship for five (5) years  
from date of purchase.  
The above warranty applies only if the installation and  
operating instructions applicable to the model  
purchased are expressly and completely  
followed.These instructions are furnished with the unit  
and are also available by writing to the Teledyne Laars  
factory. The liability of Teledyne Laars shall not exceed  
the repair or replacement of defective parts by factory  
authorized technicians, and shall not include  
transportation to or from factory, any labor costs, and  
consequential or incidental damages. Ship inoperative  
parts or complete heater with Serial number, Model  
number and purchase date, transportation prepaid,  
directly to address below, attention Customer Service,  
for evaluation and warranty consideration.  
This warranty gives you specific legal rights. You may  
also have other rights which vary from state to state, and  
by province. Some states do not allow the exclusion or  
limitation of incidental or consequential damages, so the  
above limitation or exclusion may not apply to you.  
6000 Condor Dr., Moorpark, CA 93021 USA* (805) 529-2000  
20 Industrial Way, Rochester, N.H. 03867 USA (603) 335-6300  
480S. Service Road West, Oakville, Ontario, Canada L6K 2H4 (905) 844-8233  
*
q 6000CondorDrive,Moorpark,CA93021* • (805) 529-2000 FAX (805) 529-5934  
q 480S. ServiceRoadWest, Oakville, Ontario, CanadaL6K2H4 (905) 844-8233 FAX (905) 844-2635  
q 21 Pimentel Court,Novato, CA 94949 (415) 382-8220 FAX (415) 382-0820  
Litho in U.S.A. © Teledyne Laars 9801  
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