Model LLG & LLD Pool and Spa Heater
Page 1
SECTION 1.
General Information
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
operation instructions completely before proceeding
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
improper installation.
The Laars Lite heater is design certified by
International Approval Services (formerly American
Venting Dimensions
Model Heater U.S. Indoor or Firing Rate / Hr.
Size Width
in (cm) in (cm) in (cm) in (cm) BTU (kcal)
125 15 (38) 5 (12.7) 9 1/8 (23) 16 1/4 (41.3) 125 (31.5)
175 18 (45.7) 6 (15.2) 9 3/4 (24) 24 1/8 (61.3) 175 (44.1)
250 22 1/2 (57.2) 7 (17.8) 10 (26) 25 1/4 (64.1) 250 (63)
325 26 3/4 (67.9) 8 (20.3) 10 5/8 (27) 26 1/2 (67.3) 325 (81.9)
400 31 3/4 (80.6) 9 (22.9) 13 1/4 (34) 27 1/2 (69.9) 400 (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.
Vent U.S. Outdoor
Diameter Dim "H"
CAN Outdoor (1,000's)
Shelter Dim "H"
Page 2
Gas Association and Canadian Gas Association) as
complying with the latest edition of the Standard for
Gas-Fired Pool Heaters, ANSI Z21.56, and in Canada
with CAN1-4.7-M85.
Certain sections of this manual are specific to
either United States or Canadian installations, and are
labeled as such.
1B. Description
The Laars Lite LLD heater gets electrical power
from an external 120V / 240V (volt AC) source and
provides a dual thermostat Flex-Temp control system
for pool/spa combinations or pre-heat convenience.
The Laars Lite LLD heater also meets the California,
New York, Hawaii, and Oregon state energy requirements for intermittent ignition gas appliances. The
Laars Lite LLG heater is a self contained standing
pilot unit and requires no external power.
The Laars Lite heater is specifically designed for
heating swimming pools and spas. Do not use it as a
general service water heater or for heating salt water
pools. Consult your dealer for the appropriate Teledyne Laars products for these applications.
1C. Warranty
The Laars Lite heater is sold with a limited
factory warranty. Details are specified on the back
cover of this manual. A copy of the warranty and a
warranty registration card are included in the plastic
bag shipped with the heater. Fill out and return the
warranty registration card.
Make all warranty claims to an authorized
Teledyne Laars representative or directly to the factory. Claims must include the heater serial number and
model (this information can be found on the rating
plate), installation date, and name of the installer.
Shipping costs are not included in the warranty coverage.
Damage caused by improper installation or
assembly, or to the heat exchanger by corrosive water,
is NOT covered by the Warranty. See Section 3D for
maintaining proper pool water chemistry.
NOTE: Keep this manual in a safe place for
future reference when inspecting or servicing the
heater.
1D. Technical Assistance
Consult Teledyne Laars or your local distributor
with any questions or problems involving the specifications, installation, and operation of your Teledyne
Laars equipment. An experienced technical support
staff is ready to assist in assuring the proper performance and application of Teledyne Laars products.
SECTION 2.
Installation Instructions
2A. General Information
Install the Laars Lite heaters in accordance with
the procedures in this manual, local codes and ordinances, and in accordance with the latest edition of the
National Fuel Gas Code, ANSI Z223.1. In Canada, the
installation must be in accordance with CAN1-B149.1
or .2 and local codes. The authority having jurisdiction
may require the installation conform to the Standard
for Gas-Fired Heaters, ANSI Z21.56. Any changes to
the heater, gas controls, gas orifices, wiring, draft
diverter, or improper installation may void the warranty. If field conditions require change to any of the
above, consult the factory.
All gas-fired products require correct installation
to assure safe operation. The requirements for pool
heaters include the following:
1. Field assembly (if required)
2. Appropriate site location (clearances) and
flooring
3. Sufficient combustion and ventilation air
4. Properly sized gas meter and piping
5. Proper electrical wiring (if required)
6. Adequate water flow
This manual provides the information needed to
meet these requirements. Review all application and
installation procedures completely before continuing
the installation.
2B. Field Assembly
The Laars Lite heater is shipped from the factory
with the top assembly in the low-profile configuration
for outdoor installation in the U.S. The Laars Lite
heater is design certified for indoor installation when
equipped with a drafthood, which must be installed
without modification.
The Laars Lite heater is also certified for installation in an outdoor shelter in Canada when equipped
with a drafthood. An outdoor shelter is an enclosure
not normally occupied which does not communicate
directly with occupied areas.
Check the rating plate on the heater for the
correct Teledyne Laars part number. See instructions
supplied with the drafthood for installation and attachment. When the draft hood is used, locate the heater so
as to be in the same atmospheric pressure zone as the
combustion air inlet to the heater.
If a drafthood is used, it must be connected to a
vent pipe which stops at least 2 feet (0.61 meters [m])
above the highest point of the roof or other object that
is within 10 feet (3.05 m) from the vent termination.
The vent pipe must have a listed vent cap which allows
a full equivalent opening for flue products (see Figure
2).
Model LLG & LLD Pool and Spa Heater
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.
Page 3
Figure 2. Indoor Installation Venting (USA), or Outdoor Shelter (Canada).
Table 1. Air Openings to Outside
Required Net Free Open Area
for Combustion Air Openings
Direct from outside Duct from outside
Model in
125 32 (206) 64 (413)
175 44 (284) 88 (568)
250 63 (406) 126 (813)
325 82 (429) 164 (1058)
400 100 (645) 200 (1290)
Note: If using screens and/or louvers, compensate by adding 50%
additional area to each opening.
2
(cm2)in2(cm2)
2C-1. Installation Information
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 combustible surfaces shown in Table 2 are met.
2C-2. Outdoor Installation
Laars Lite heaters can be installed in the lowprofile, grate top configuration (U.S.A. only) as
received from the factory, or with an optional high
2C. Site Location
wind vent cap/stack. Canadian units require a factory
approved vent cap.
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
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
U.S. Canada U.S. Canada
Side of Heater
Blank 6 15.2 6 15.2 6 32 6 15.2
Rear 6 15.2 6 15.2 6 32 6 15.2
Piping 12 30.5 18 45.7 12 30.5 18 45.7
Top 44 111.7 44 111.7 Open Unroofed Area
Front 18 45.7 36 91.4 18 45.7 36 91.4
inch cm inch cm inch cm inch cm
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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).
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.
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 directions. 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-combustible panel. You can obtain a non-combustible base
from Teledyne Laars, part number 10521701-05.
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 (0.30m). 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.
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.
2C-3. Flooring - Typical Installation
Do not install the heater directly on a combustible wood or carpet floor without placing a noncombustible 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
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.
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 combustion.
If the heater is installed in a residential garage, or
where flammable vapors will be present, the
Model LLG & LLD Pool and Spa Heater
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.
Page 5
Manual Shutoff
Valve
Caution
Do not operate this heater outdoors at
temperatures below 20 degrees Fahrenheit
(°F) (-7 degrees Celsius [°C]).
2E. Gas Supply and Piping
2E-1. General Instructions
Review the following general instructions before
continuing the installation.
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.
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:
a. High altitude (H) - 2,000 to 6,000 feet (609 to
1829 m)
b. High altitude (J) - 6,000 to 10,000 feet (609 to
3048 m)
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.
Gas Supply
Inlet
T-Fitting
3" Min.
Cap
Figure 5. The proper design for a sediment trap / drip
leg.
Nipple
Union
To
Equipment
Inlet
5. Install a sediment trap (drip leg) ahead of the gas
controls (see Figure 5). Fit the trap with a
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.
Table 3. Natural Gas Pipe Size Requirements
Distance from Gas Meter
0-50 feet 50-100 feet 100-200 feet
Heater (0-15 m) (15-30 m) (30-60 m)
Size in. (mm) in. (mm) in. (mm)
125 3/4 (19) 1 (25.4) 1 (25.4)
175 1 (25.4) 1 (25.4) 1-1/4 (31.75)
250 1 (25.4) 1-1/4 (31.75) 1-1/4 (31.75)
325 1-1/4(31.75) 1-1/4 (31.75) 1-1/2 (38)
400 1-1/4(31.75) 1-1/2 (38) 1-1/2 (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.
Page 6
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.
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.
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.
Table 4. Gas Supply Pressure Requirements
Supply Pressure Natural Gas Propane Gas
Water Column in. (mm) in. (mm)
Minimum 6 (152) 10 (254)
Maximum 14 (356) 14 (356)
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.
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)
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.
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 heater comes factory-wired intended for use
with 240 Volt, 60 Hz AC field electrical supply. To
To wire the Laars Lite heater:
1. Wire the heater to a 120V or 240V /60 Hertz
(Hz) electrical source.
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).
3. Remove the screw located to the lower right of
the transformer and open the hinged cover.
NOTE: No external junction box is required.
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):
1. Remove heater door.
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.
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
Model LLG & LLD Pool and Spa Heater
Page 7
Figure 6. LLD Connection/Schematic Wiring Diagram.
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 temperature 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
Model LLG & LLD Pool and Spa Heater
Figure 8. Field Wiring Connections (LLD).
Page 9
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 connected to the heater if local codes allow it, by using the
CPVC nipples included with your heater.
Figure 10. Piping installation.
Figure 11. Plastic piping connections.
Page 10
To install plastic piping (see Figure 11):
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.
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 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.
Figure 12. Heat exchanger reversal.
CLAMP
IN/O U T H E AD E R
BRACKET
Figure 13. Flue collector holddown brackets.
Model LLG & LLD Pool and Spa Heater
Page 11
Heat Exchanger
End Baffles
Heat Exchanger
Combustion
Chamber Wall
Figure 14. Temperature sensing bulb.
LEFT
VESTIBULE
COVER
FRONT
Figure 15. Vestibule covers.
RIGHT
VESTIBULE
COVER
PLASTIC BUSHING
12. Unscrew the brass compression fitting securing
the pressure switch. Remove tube from header
and gently bend it out of the way.
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.
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 attempting to lift the heat exchanger out of the
heater.
Figure 16. Heat exchanger and end baffles.
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).
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.
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.
18. Re-route pressure switch tube and thermostat
bulb assembly through hole in left side of (vestibule) cover in reverse order.
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.
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.
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.
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.
26. Reconnect yellow wires (Model LLG only) to
redundant limit fuse on the flue collector.
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.
30. Double-check to make sure the wiring is not
pinched against sharp edges, or resting on the flue
collector assembly.
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.
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
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 excessive chemicals or improper ozonation is not covered by
the Teledyne Laars warranty. Be sure to adhere to the
following:
• When ozone is injected upstream of the heater,
install an offgas mixing chamber, or an ozone
bypass system between the heater and the ozone
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).
• Never deposit chemicals directly in the pool
skimmer.
2G-5.Pressure Relief Valve
A pressure relief valve is not furnished with the
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
system components.
2G-6.Adjusting the Pressure Switch
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.
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.
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:
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.
(NOTE: Heater should not be allowed to fire on
low speed).
Model LLG & LLD Pool and Spa Heater
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.
Page 13
2G-7. Automatic Flow Control Valve
The automatic flow control valve maintains the
proper flow through the heater at rates up to approximately 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.
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:
1. Make sure the pool filter is clean.
2. Set the rotary switch on the temperature control
panel (see Figure 17) to OFF.
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).
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.
7. Record the temperature indicated by the thermometer (cold water).
8. Turn the heater ON following the lighting instructions found on the inside of the heater.
9. Allow the heater to run for about 3 minutes.
Record the new temperature reading (heated
water).
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)
125 20 (76) 27 (15) 36 (20)
175 20 (76) 33 (19) 42 (24)
250 25 (95) 33 (19) 42 (24)
325 30 (114) 28 (16) 38 (21)
400 30 (114) 30 (17) 39 (22)
11. If the temperature rise is below the minimum
range indicated, two possibilities arise:
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).
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.
Caution
Operation with the temperature rise above
maximum or below the minimum can damage
the heater and may void the warranty.
13. If the temperature rise is within the correct range,
complete the procedure as follows:
a. Turn heater off.
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.
a) Model LLD Temperature Control
b) Model LLG Temperature Control
Figure 18. Temperature controls.
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.
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.
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
SECTION 3.
Operating Instructions
3A. General Information
With any new pool or spa installation, operate the
filter pump with the heater off long enough to completely 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.
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.
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.
3B-1. Model LLD (see Page 15).
3B-2. Model LLG (see Page 16).
Model LLG & LLD Pool and Spa Heater
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.
Page 15
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.
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
• 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.
2. Set the thermostat to lowest setting and turn
appliance switch to "OFF".
3. Turn off all electric power to the appliance.
4. This appliance is equipped with an ignition
device which automatically lights the heater.
Do not try to light the burners by hand.
5. Remove the heater door.
6. Turn gas control knob clockwise to
"OFF".
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".
• 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.
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.
9. Replace control access panel
10. Turn on all electric power to appliance.
11. Set thermostat to desired setting and turn
appliance switch from "OFF" to either
"POOL" or "SPA".
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.
TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat to lowest setting and turn
appliance switch to "OFF".
2. Turn off all electric power to the appliance if
service is to be performed.
3. Turn gas control knob clockwise to
"OFF".
4. Replace control access panel.
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.
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.
• 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.
2. Set the thermostat to lowest setting and turn
appliance ON/OFF switch to "OFF".
3. Turn gas control knob clockwise until it
stops at "OFF" position.
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
gas go to the next step.
5. To find pilot—follow gas line
from gas valve to pilot
location.
6. Turn knob on gas valve
counterclockwise to
"PILOT" then push control
knob all the way and hold down.
TO VALVE
PILOT
BURNER
• 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.
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.
7. Push the button of the sparker, repeating until
confirming that pilot lights, by observing
reflection on burner tray mirror.
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.
• If knob does not pop out when released, stop
and immediately call your service technician
or gas supplier.
• 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.
9. Turn gas control knob counterclockwise
to "ON".
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.
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 to "OFF". Do
not force.
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.
3C. Setting the Temperature Control
The temperature control (see Figure 17) is
calibrated at the factory and covers a range from
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.
approximately 70 to 104°F (21 to 40°C). Use an
accurate pool thermometer to determine the best water
temperature for your uses.
The Laars Lite model LLD has dual temperature
controls, which allows two different temperature
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.
3D-2. Winterizing
In areas where freezing temperatures occur in
winter, and the pool or spa will not be used, have your
service technician perform the following steps:
1. Turn off the main gas supply valve to the
heater, outside the heater jacket.
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
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-
6. Use compressed air to blow out any standing
water remaining in the heat exchanger.
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).
quired to raise the pool water back up to the desired
temperature.
Page 18
3D-3. Spring Start-up
To restart the heater in the Spring, have a professional 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).
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.
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 corrosive chemical levels or excess dissolved solids in pool
or spa water.
For spas, it is also necessary to perform water
changes in addition to chemical treatment. It is recommended to change the spa water every 60 days for light
usage and every 30 days if usage is heavy.
2. The drinking of alcoholic beverages before or
during spa or hot tub use can cause drowsiness
which could lead to unconsciousness, and subsequently result in drowning.
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) maximum.
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).
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
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.
Model LLG & LLD Pool and Spa Heater
Page 19
drowsiness (e.g., tranquilizers, antihistamines, or
anticoagulants) should not use spas or hot tubs.
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:
• 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
• Unconsciousness resulting in a danger of drowning
3G. Swimming Pool Energy Saving Tips
Teledyne Laars offers the following recommen-
dations to help conserve fuel and minimize the cost of
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.
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.
7. Where possible, shelter the pool from prevailing
winds with well-trimmed hedges or other landscaping, cabanas, or fencing.
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.
3H. Periodic Inspection
Table 7. Mineral Concentration Levels
Test Recommended Level
Free chlorine 1.0 to 3.0 ppm
Bromine 3.0 to 5.0 ppm
pH 7.2 to 7.8
Total alkalinity (TA) 80 to 120 ppm
Calcium hardness (CH) 200 to 400 ppm
Langelier saturation index (LSI) -0.5 to +0.5
Total dissolved solids (TDS) Less than 2000 ppm
Cyanuric acid 30 to 150 ppm
Copper 0 ppm
operating your pool heater without sacrificing comfort.
1. The American Red Cross recommends a maximum 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.
2. Carefully monitor the water temperature of your
pool in the summertime. You can reduce heater
usage due to warmer air temperatures.
3. Find the proper setting on the pool heater temperature control and use the TEMP-LOK to
WARNING
Improper installation or maintenance can
cause nausea or asphyxiation from carbon
monoxide in flue gases which could result in
severe injury, or death.
3H-1. Owner Inspection
Teledyne Laars designs and constructs the Laars
Lite heater to provide long performance life when
installed and operated properly under normal conditions. The following basic guidelines are suggested for
your inspection:
1. Keep the top and surrounding area of the heater
clear of all debris.
2. Keep the heater area clean and free of all com-
bustible materials, flammable liquids and vapors,
as well as sanitization chemicals.
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.
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.
Page 20
5. Be sure all combustion air and ventilation openings 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 Part Number
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
Model LLG & LLD Pool and Spa Heater
Description Part Number
13. Bracket, Insulation Retainer ...................................... 10462200
14. Sleeve, Temperature Control Bulb ............................10444900
15. Retainer Bracket....................................................... 10447300
16. Wire Harness, High Limit ......................................... 10419300
17. Disc, High Limit 150°F
18. Disc, High Limit 135°F
19. Connector Fitting ..................................................... P0019700
20. Plug 3/4 NPT........................................................... P0027000
21. Plug 1/4 NPT........................................................... P0026800
*E. BURNER TRAY ASSEMBLY (LLD)
Burner Tray Assembly, Nat ....................................... R0316901-05
Burner Tray Assembly, LP ....................................... R0319501-05
1. Burner Tray Weldment ....................................... R0317001-05
2. Burner ...................................................................... L0052300
3. Gas Valve, Nat ........................................................ R0317100
3. Gas Valve, LP ......................................................... R0319600
**E. BURNER TRAY ASSEMBLY (LLG)
Burner Tray Assembly, Nat ....................................... R0098601-05
Burner Tray Assembly, LP ........................................ R0098701-05
1. Burner Tray Weldment ....................................... R0099501-05
2. Burner ...................................................................... L0052300
3. Gas Valve, LP ......................................................... R0096900
3. Gas Valve, Nat ........................................................ R0096400
4. Pilot Main Burner Assy LP ....................................... R0099200
4. Pilot Main Burner AssyNat....................................... R0099100
5. Pilot, Burner, LP, .010 ............................................. R0096600
5. Pilot, Burner,Nat, .018 ............................................. R0096700
6. Pilot Generator ....................................................... W0036901
7. Ceramic Insulator Assy ........................................... R0099300
8. High Voltage Lead Assy .......................................... R0098900
9. Pilot Tube ................................................................ R0096300
10. Piezo Lighter Assy................................................... R0096800
(see Note 1) ........................
(see Note 1) ........................
R0023000
R0022700
Page 21
F. TEMPERATURE CONTROL ASSEMBLY
**1. Temperature Control (LLG) ..................................... R0058200
2. Knob, Thermostat .................................................... R0313800
*1. Temperature Control (LLD)...................................... R0011700
2. Knob, Thermostat .................................................... R0313800
OPTIONAL EQUIPMENT
Non Combustible Base ................................................ 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)
Page 22
A2
A1
A4
A3
B2
A5
Redundant Limit
(LLG only)
D
B3
See Page 23
for detail
F
B4
E10
C3
B8
C1
B1
C2
E
See Page 23
for detail
C5
C4
Model LLG & LLD Pool and Spa Heater
Detailed view of LLG Burner Tray Assembly (E)
E2
E3
Detailed view of Heat Exchanger Assembly (D)
Page 23
E1
E4, E5, E6,
E7, E8, E9
E3
D12
D10
D11
E2
D20
D18
D1, D3
D5, D6
D13
D19
D14, D15,
D16, D17
Detailed view of LLD Burner Tray Assembly (E)
D2, D4
D8, D9
D7
E1
Page 24
NOTES
Model LLG & LLD Pool and Spa Heater
Y our Laars Lite pool/spa heater is backed by this double warranty
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.
Page 25
LAARS LITE
LIMITED W ARRANTY
to assure your complete satisfaction.
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 T eledyne 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
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
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.
*
q 6000 Condor Drive, Moorpark, CA 93021* • (805) 529-2000 FAX (805) 529-5934
q 480 S. Service Road West, Oakville, Ontario, Canada L6K 2H4 • (905) 844-8233 FAX (905) 844-2635
q 21 Pimentel Court, Novato, CA 94949 • (415) 382-8220 F AX ( 415) 382-0820
Litho in U.S.A. © Teledyne Laars 9801
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