Teledyne LLG, LLD User Manual
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"
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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.
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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
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