Installation and Operation Data
FOR YOUR SAFETY - This product must be installed and serviced by a professional service technician, qualified in pool heater installation. Improper installation and/or operation could create carbon monoxide gas in flue gases which
could cause serious injury, property damage, or death. Improper installation
and/or operation will void the warranty.
Installation and
Operation Manual
Laars Lite 2
Pool and Spa Heater
Models LG and LD
Natural Gas or LP Gas
NOTE: LD LP Gas For
Outdoor Use Only
WARNING: If these instructions are not followed exactly, a fire or explosion
may result, causing property damage, personal injury, or death.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity
of this or any other appliance.
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a nearby phone. Follow the gas
suppliers instructions.
If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency,
H0235900-
or the gas supplier.
WHAT TO DO IF YOU SMELL GAS
TABLE OF CONTENTS
SECTION 1.
General Information
1A. Introduction................................................... 1
1B. Description ................................................... 2
1C. Warranty....................................................... 2
1D. Technical Assistance .................................... 2
SECTION 2.
Installation Instructions
2A. General Information ..................................... 2
2B. Field Assembly ............................................. 2
2C. Site Location ................................................ 3
2C-1. Installation Information ................................. 3
2C-2. Outdoor Installation ...................................... 4
2C-3. Flooring - Typical Installation ....................... 4
2C-4. Indoor and Outdoor Shelter Installation........ 4
2D. Combustion and Ventilation Air Supply ........ 5
2E. Gas Supply and Piping ................................. 5
2E-1. General Instructions ..................................... 5
2E-2. Special Precautions for Propane Gas .......... 6
2F. Electrical Wiring ........................................... 6
2F-1. General Information (LD Only) ..................... 6
2F-2. Auxiliary Time Clock Wiring ......................... 8
2F-3. Remote Operation (Model LD Only) ............. 9
2G. Water Flow System ...................................... 9
2G-1. Flange Installation ........................................ 9
2G-2. Reversible Water Connections ................... 10
2G-3. Valve Installation ........................................ 12
2G-4. Chlorinators, Ozone Generators, and
Sanitizing Chemicals .................................. 12
2G4a Water Chemistry ........................................ 13
2G-5. Pressure Relief Valve ................................. 13
2G-6. Adjusting the Pressure Switch .................... 13
2G-7. Automatic Flow Control Valve .................... 14
2G-8. Temperature Rise ....................................... 14
2G-9. Adjusting the Manual Bypass Valve ........... 15
SECTION 3.
Operating Instructions
3A. General Information ................................... 16
3B. Lighting and Shutdown Procedures ............ 16
3B-1. Model LD (Direct Ignition) .......................... 16
3B-2. Model LG (Standing Pilot) .......................... 16
3C. Setting the Temperature Control ................ 16
3D. Seasonal Care ............................................ 19
3D-1. Spring and Fall Operation .......................... 19
3D-2. Winterizing ................................................. 19
3D-3. Spring Startup ............................................ 19
3E. Water Chemistry ........................................ 20
3F. Spa/Hot Tub Safety Rules .......................... 20
3G. Swimming Pool Energy Saving Tips .......... 20
3H. Periodic Inspection ..................................... 21
3H-1. Owner Inspection........................................ 21
3H-2. Professional Inspection .............................. 21
SECTION 4.
Parts List for Laars Lite 2 Heater
4A. General Information .................................. 21
4B. Parts List ................................................... 21
Model LG & LD Pool and Spa Heater
Page 1
SECTION 1.
General Information
1A. Introduction
This manual provides installation and operation
instructions for the Laars Lite 2, Model LG and LD
pool and spa heaters. Read these installation and
operation instructions completely before proceeding
with the installation. Consult the Waterpik 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 2 heater is design certified by
International Approval Services (formerly American
Gas Association and Canadian Gas Association) as
complying with the latest edition of the Standard for
(920 cm)
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 2 is constructed for 75 psi working pressure.
3. Ratings shown are for both natural and propane gas.
Vent U.S. Outdoor
Diameter Dim "H"
CAN Outdoor (1,000's)
Shelter Dim "H"
Figure 1. General Configuration.
Page 2
WATERPIK TECHNOLOGIES INC.
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 2 LD heater gets electrical power
from an external 120VAC or 240VAC source and
provides a dual thermostat Flex-Temp control system
for pool/spa combinations or preheat convenience. The
Laars Lite 2 LD heater also meets the California, New
York, Hawaii, and Oregon state energy requirements
for intermittent ignition gas appliances. The Laars Lite
2 LG heater is a self contained standing pilot unit and
requires no external power.
The Laars Lite 2 heater is specifically designed
for heating swimming pools and spas. Do not use it as
a general service water heater. There is a specially
designed model of Laars Lite 2 for heating salt water
pools. Consult your dealer for the appropriate
Waterpik Laars products for these applications.
1C. Warranty
The Laars Lite 2 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
Waterpik 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 Waterpik Laars or your local distributor
with any questions or problems involving the specifications, installation, and operation of your Waterpik
Laars equipment. An experienced technical support
staff is ready to assist in assuring the proper performance and application of Waterpik Laars products.
For technical support call (415) 382-8220 extension
260.
SECTION 2.
Installation Instructions
2A. General Information
Install the Laars Lite 2 heaters, vent caps and
drafthoods 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 that 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 2 heater is shipped from the
factory with the top assembly in the low-profile
configuration for outdoor installation in the U.S. In
Canada, an outdoor installation requires the addition of
a factory approved vent cap. The Laars Lite 2 heater is
design certified for indoor installation when equipped
with a drafthood, which must be installed without
modification.
The Laars Lite 2 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 or the Parts
List (Sec. 4) of this manual for the correct Waterpik
Laars drafthood or vent cap part number. See instructions supplied with the drafthood or vent cap for
installation and attachment. When the drafthood is
used, locate the heater so as to be in the same atmospheric pressure zone as the combustion air inlet to the
heater.
Model LG & LD Pool and Spa Heater
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. Site Location
Improper installation or maintenance can
cause nausea or asphyxiation from carbon
monoxide in flue gases which could result in
2C-1. Installation Information
Avoid placing the heater in locations where it can
cause damage by water or condensate leakage. If this is
When 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
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.
allows a full equivalent opening for flue products (see
Figure 2).
Table 2. Minimum Heater Clearances From Combustible Surfaces
Indoor (Outdoor Shelter) Installation Outdoors Installation
WARNING
severe injury, or death.
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
()
( )
()
()
()
()
()
()
()
()
()
()
( )
()
()
()
()
( )
()
()
()
()
Page 4
WATERPIK TECHNOLOGIES INC.
2C-2. Outdoor Installation
Laars Lite 2 heaters can be installed in the lowprofile, 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.
Figure 3. Outdoor Heater 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
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. In Canada this distance
must be at least 10 feet (3.0 m) (see Figure 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 hollow
masonry no less than 4 inches (102 millimeters [mm])
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.
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 downdraft conditions. Where
downdraft conditions exist, locate the heater at least 3
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.
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 noncombustible
panel. You can obtain a noncombustible base from
Waterpik Laars, see the Parts List (Sec. 4) of this
manual.
2C-4. Indoor and Outdoor Shelter
Installations
All indoor installations and outdoor shelter
installations (Canada) require the addition of a factory
approved drafthood. The drafthood must be installed
Model LG & LD Pool and Spa Heater
without modification and in accordance with all local,
state, provincial and national codes.
Proper ventilation of exhaust and combustion air
are essential for the safe operation of the heater.
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). Waterpik 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.
Waterpik Laars does not recommend outdoor shelter
installations that depend on internal air for combustion.
Combustion air should be ducted to the heater from
outside the structure.
If the heater is installed in a residential garage, or
where flammable vapors will be present, the
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.
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 and all
local codes. 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. Waterpik
Laars heaters, as shipped from the factory, are
certified to operate at an altitude of 0 to 3000 feet
(0 to 915 m) for natural gas and 0 to 5000 feet (0
to 1525 m) for propane gas in the United States.
Or if so ordered, at higher altitudes. For higher
altitudes, the heater manifold is marked with a
tag or sticker indicating one of the following high
altitude operation codes:
Page 5
Manual Shutoff
Valve
Gas Supply
Inlet
T-Fitting
3" Min.
(76 mm)
Cap
Figure 5. The proper design for a sediment trap / drip
leg.
Nipple
Union
To
Equipment
Inlet
a. High altitude (H) - 3,000 to 6,000 feet (915 to
1,830 m) for natural gas and 5000 to 10,000
feet (1525 to 3050 m ) for propane gas.
b. High altitude (J) - 6,000 to 10,000 feet (1830
to 3,050 m)
3. In Canada, the heater rating plate is marked for
specific altitude requirements: lo altitude is 0 to
2,000 feet (0 to 610 m) and high altitude (H) is
2,000 to 4,500 feet (610 to 1,370 m) above sea
level for natural gas and 0 to 4500 feet (0 to 1370
m) for propane gas.
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.
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 proceeding with work.
3. Pipe fittings must be considered when determining gas
pipe sizing.
Page 6
WATERPIK TECHNOLOGIES INC.
Table 4. Gas Supply Pressure Requirements
Supply Pressure Natural Gas Propane Gas
Water Column in. (mm) in. (mm)
Minimum 5.5 (140) 10.0 (254)
Maximum 10.0 (254) 14.0 (356)
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 FLEXIBLE GAS 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.
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 undersized 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.
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. Electrical Wiring
Caution
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Verify proper operation after servicing.
Attention
Au moment de l'entretien des commandes,
étiquetez tous les fils avant de les débrancher.
Des erreurs de câblage peuvent entraîner un
fonctionnement inadéquat et dangereux.
2F-1. General Information (LD 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) . The
heater 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 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.
To wire the Laars Lite 2 model LD heater to a
120V or 240V /60 Hertz (Hz) electrical source:
1. Remove the screw located to the lower right side
of the transformer and open the hinged cover of
the wiring enclosure.
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
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. Connect the wires from the power source to the
leads on the right side of the heater in the space
behind the ignition control (see Figure 8). Be sure
to follow the wiring diagram on page 7 to configure the transformer for the correct input voltage.
3. Attach the ground wire to the green ground screw
located on the back panel of the wiring enclosure.
4. Close the cover of the wiring enclosure and
replace the screw to hold it in place.
5. Connect a bonding wire (8 ga copper) to the
bonding lug on the right side of the heater.
NOTE: No external junction box is required.
Model LG & LD Pool and Spa Heater
IGNITOR
IGNITION
L2
IGN
IGN120
IGN240
ONLY 120 V
240V
60 Hz
SINGLE
ATTACH
GROUND
ATTACH
GROUND
FS
FLAME SENSOR
MODEL LD WIRING DIAGRAM
OFF
SPA
POOL
REMOTE
CONNECTOR
BK
WWW W
WATER
TEMP
SENSOR
PRESSURE
SWITCH
Y/BK
HONEYWELL
GAS VALVE
MV1
MV2
Y
a) Connection Diagram
L1
LIMIT
HSI IGNITION WIRE
FACTORY WIRED - 120 V/240 V
FIELD WIRED - 120V /240V
FACTORY WIRED - 24 V
LIMIT
BR
Y
FIREMAN
SWITCH
CONNECTION
W
W
W
W
IF ORIGINAL WIRE SUPPLIED WITH HEATER
MUST BE REPLACED, APPLIANCE WIRING
MATERIAL RATED AT 105 C SHALL BE USED.
WIRING SHOWN AS SHALL USE
APPLIANCE WIRING MATERIAL RATED AT 200 C.
FUSIBLE
LINK
FLAME SENSE RO D
IGN/1 20
IGN/2 40
(LI)
(L2)
IGN
FS
TH
VALVE
GND
IGNIT ER
ELEC.
FUSE
NOTE:
TRANSFORMER
120-240 V
R
G/Y
Y
WIRE TO IGN/1 20
FOR 120 VOLTS
WIRE TO IGN/2 40
FOR 240 VOLTS
BK
W/R
W/BK
R
IGNITION CONTROL
(FENWAL)
0533
TRANSFORMER
120-240V / 24 V
(L1)
(L2)
240V CONNECTION
SHOWN
60 HZ
O
G
G
BK
R
ALTERNATE 120 V WIRING
BK
W/R
W/BK
R
BK
L2
G
R
BK
R
WIRE
HERE
Page 7
O
PHASE
BK
R
WIRE
HERE
TH
PRESSURE
SWITCH
BK
BK/Y
W
HI-LIMIT
SWITCH
W
O
150 F
HI-LIMIT
SWITCH
SPA SET POINT
VALVE
BR
O
135 F
FIREMAN
SWITCH
CONNECTOR
POOL SET POINT
OFF
CIRCUIT
SEN
WATER TEMPERATURE
SENSOR
H/W GAS VALVE
MV1 MV2
W
FUSIBLE
LINK
SEN
L1
Y
ELECTRICAL
FUSE
1-25 AMP
or
R
TRANSFORMER
W
24 V
GND
Y
GND
W
CONTROL
BK WBR YROY/BK W/BK W/R G/Y -
Black
White
Brown
Yellow
Red
Orange
Yellow & Black
White & Black
White & Red
Green & Yellow
b) Schematic Diagram
Figure 6. LD Connection/Schematic Wiring Diagram.
H0236300-
Page 8
WATERPIK TECHNOLOGIES INC.
2F-2. Auxiliary Time Clock Wiring (LD)
If you install a time clock to control the filter
pump operation, it is recommended that the time clock
have its own low voltage (Firemans) 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
0,//,92/7+($7(5:,5,1*',$*5$0
Connection
Diagram
BK - Black
W- White
Y-Yellow
R-Red
O- Orange
Y
Y
efficient operation by removing any residual heat
contained in the heat exchanger back to the pool.
Caution
Do not provide power to the heater from the
high voltage side of the time clock. Doing so
may cause damage to the heater or
surrounding plumbing.
Switch
Fireman
Switch
Connection
Fusible
Link
High
Limit
W
BK
Pressure
Switch
TEMP. CONTROL
On
Off
OO
BK
BK
Min
Max
Y
High
Limit
Switch
W
W
W
Y
IF ANY OF THE ORIGINAL WIRE AS
SUPPLIED WITH THE HEATER MUST BE
REPLACED, APPLIANCE WIRING
MATERIAL RATED FOR 105°C MUST BE
USED. WHERE MARKED THUS
APPLIANCE WIRING MATERIAL FOR
200°C MUST BE USED.
PP/TH
Y
W
PP/TH
W
Y
W
W
TH
PP
_
+
To Pilot
Generator
BK
BK
Y
TH/PP
Pilot
Gen
CIRCUIT
R
Sparker
W
Piezo
TH
Pilot
R
Y
BK
PP
Y
Pilotstat
Power
Unit Coil
Val ve
Operator
Coil
Piezo
Sparker
PP
H0166000 G
Figure 7. LG Connection/Schematic Wiring Diagram
Model LG & LD Pool and Spa Heater
Figure 8. Field Wiring Connections (LD).
Page 9
2F-3. Remote Operation
(Model LD Only)
The Laars Lite 2 pool/spa heater controls can
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 Waterpik 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 temperature control panel or allow for temperature
adjustments.
To connect a 3-wire remote (not supplied by
Waterpik Laars) to a Laars Lite 2 LD heater, order a
wire harness assembly (part No. E0120000) which
connects to the temperature control panel. Installation
instructions are included with the wire harness assembly.
Consult with Waterpik Laars Service Department
with questions about installing remotes other than
Waterpik Laars.
Figure 9. Time Clock Wiring.
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.
2G. Water Flow System
2G-1. Flange Installation
The heater has 2" NPT universal header couplings. You can connect threaded 2" NPT 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.
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.
Page 10
WATERPIK TECHNOLOGIES INC.
2G-2. Reversible Water Connections
Waterpik Laars ships the Laars Lite 2 heater with
the water connections on the right side. The Laars Lite
2 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 and service. Perform this modification
before installing the heater using the following procedures:
REAR RAIN SHIELD
PANEL OMITTED ON
CANADIAN MODELS
Figure 10. Piping installation.
TRANSITION PLATE
TOP OMITTED ON US
MODELS
RUBBER
JACKET/PLUG
GROMMET
Figure 11. Plastic piping connections.
Figure 12. Heat exchanger reversal.
Model LG & LD Pool and Spa Heater
Page 11
1. Remove heater door.
2. If there is a vent cap or drafthood (indoor) on top
of the heater, remove it.
3. Remove all 8 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 to the
jacket and put them aside. Remove gap closures.
6. Remove the screws securing the two flue collector hold down clamps and remove the clamps (see
Figure 13). Remove flue collector.
7. Remove the three rubber jacket/plug grommets
and drain plugs (see Figure 12). One is located
under the water connections on the right side. The
other two are on the left side toward the front of
the heater.
8. 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.
9. Remove plastic tie wraps and pull the white wires
out of the front compartment through the vestibule cover and coil them on the heat exchanger.
10. Unscrew the brass compression fitting securing
the pressure switch to the inlet/outlet header.
Remove tube from header and gently bend it out
of the way.
11. 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
the hole in the vestibule cover and into the vestibule (controls compartment), then pull thermostat
bulb assembly through same hole (see Figure 15).
12. 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 (see Figure 16).
Caution
It may be necessary to have help lifting the
heat exchanger out and replacing it.
BRACKET
Figure 13. Flue collector hold-down brackets.
HOLD DOWN
CLAMP
IN/OUT HEADER
Figure 14. Temperature sensing bulb.
(U.S. MODELS
ONLY)
LEFT
VESTIBULE
COVER
FRONT PLASTIC BUSHING
Figure 15. Vestibule covers.
RIGHT
VESTIBULE
COVER
Page 12
WATERPIK TECHNOLOGIES INC.
Heat Exchanger
End Baffles
Heat Exchanger
Combustion
Chamber Wall
Figure 16. Heat exchanger and end baffles.
13. Lift the heat exchanger assembly out of the
heater. Reinstall heat exchanger 180 degrees
(inlet/outlet header left) from it's original position.
14. After replacing the heat exchanger into 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.
15. Remove pressure switch retainer (plastic cable
clamp) from the inner panel (allow pressure
switch to float).
16. On U.S. models reroute pressure switch tube and
thermostat bulb assembly through hole in left side
of vestibule cover in reverse order. Canadian
models have no cover on the left side of the
vestibule. Relocate the pressure switch tube and
temperature sensor through the open side of the
vestibule.
17. Reinstall the temperature sensing bulb in the
header, and fasten it with the retainer bracket and
screw.
18. Reinstall the compression fitting at end of pressure switch tube into inlet/outlet header and
tighten the fitting.
19. Route the white wiring from the high limit
switches beside the heat exchanger and down to
the original location following the pressure switch
tubing. Secure white wires to the pressure switch
tube with plastic wire ties.
20. Connect the white wire labeled PS to the pressure
switch and the other white wire to its original
location on the Fireman's switch.
21. Reinstall the drain plugs and tighten securely.
Replace jacket/plug grommets.
22. Install the flue collector assembly. Be sure the
front and rear panels of the flue collector are
installed into the grooves on the front and rear
combustion chamber heat shield panels. Be sure
the sheet metal panels are not pinching any wires.
23. Attach the flue collector hold down clamps to the
clips located under the two center header bolts.
24. Replace the gap closures and tighten the screws
securely.
25. Double-check to make sure the wiring is not
pinched against sharp edges, or resting on the flue
collector assembly.
26. Reinstall rainshield assembly.
27. Replace the top assembly. Make sure the tabs are
outside the heater jacket. Fasten the top assembly
with the hex-head screws.
28. Install plastic tie wraps on wiring in the vestibule
(controls compartment).
29. Install heater door.
30. 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 Waterpik Laars Lite 2 heater is manufac-
tured 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 ozonization is not covered
by the Waterpik 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.
Model LG & LD Pool and Spa 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-4a. 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. Waterpik
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.
Page 13
Figure 17. Thermometer and pressure relief valve.
2G-6. Adjusting the Pressure Switch
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
2G-5. Pressure Relief Valve
A pressure relief valve is not furnished with the
Laars Lite 2 heater. However, it is recommended that a
pressure relief valve be installed and may even be
required by local codes.
To install a pressure relief valve, remove the 3/4
inch (19 mm) brass plug located on the top of the inlet/
outlet header (see Figure 17). Install the pressure relief
valve in the threaded hole from which the plug was
removed. The pressure rating of the valve should be at
or below the lowest working pressure of any component in the filter system. Any pressure relief valve
installed must comply with provisions of the Standard
described in ANSI Z21.22 for the United States, or
CAN1-4.6 in Canada.
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
Waterpik 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. Set the control panel rotary switch (LD) or the
control panel rocker switch (LG) to the OFF
position (see Figure 18).
2. Set the Pool temperature control to the Max
position.
3. Turn filter pump on. If a two-speed pump is used,
make sure it is at high speed.
Page 14
a) Model LD Temperature Control
b) Model LG Temperature Control
Figure 18. Temperature controls.
WATERPIK TECHNOLOGIES INC.
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 20), then perform a
temperature rise test (see Section 2G-8) and adjust the
flow using 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 (LD) or rocker switch (LG)
on the temperature control panel (see Figure 18)
to OFF.
Figure 19. Pressure switch adjustment.
NOTE: Heater should not be allowed to fire on
low speed.
4. Turn rotary switch (LD) or rocker switch (LG) to
ON. Heater should start.
5. Pry out the top rubber dust plug on the top of the
pressure switch.
6. 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 19).
7. Slowly turn the pressure switch adjustment screw
counterclockwise one-quarter turn. The heater
should come back on.
8. 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.
9. Return the pool temperature control to the desired
temperature.
3. Turn the filter pump off.
4. Remove the drain plug located on the inlet/outlet
header of the heater and replace it with a Pete's
plug (see Figure 17).
5. Insert a pocket thermometer (see Figure 17)
through the Pete's plug into the header.
6. Turn the filter pump on and wait 3 minutes. The
heater remains off. This allows water from the
pool to reach the heater.
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).
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)
Model LG & LD Pool and Spa Heater
Page 15
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.
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.
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 the inlet/outlet
header of the heater and replace it with a Pete's
plug.
3. Insert a pocket thermometer (see Figure 17)
through the Pete's plug into the header.
4. Close manual bypass valve.
5. Turn rotary switch (LD) or the rocker switch
(LG) on the temperature control to the OFF
Caution
Operation with the temperature rise above
maximum or below the minimum can damage
the heater and may void the warranty.
position.
6. Repeat steps 6 through 10 of the temperature rise
test (see Section 2G-8).
7. If the temperature rise is below the minimum
stated in Table 6, open the manual bypass valve
13. If the temperature rise is within the correct range,
complete the procedure as follows:
a. Turn heater off.
b. Wait 3 minutes, turn filter pump off.
c. Remove thermometer and Pete's plug.
d. Replace the drain plug.
until temp rise climbs between the min. and max.
range for your size heater. If the minimum
temperature rise stated in Table 6 cannot be
reached with the manual bypass fully open, then
the gas supply volume is too low.
8. 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.
Page 16
9. Once the temperature is within the correct range,
safety wire the handle of the manual bypass valve
in place and tag the valve to prevent change in the
water flow.
SECTION 3.
Operating Instructions
WATERPIK TECHNOLOGIES INC.
WARNING
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.
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.
Caution
Do not use this heater if any part has been
under water. Immediately call a qualified
service technician to inspect the heater and
replace any part of the control system and any
gas control which has been under water.
Attention
N'utilisez pas cet appareil s'il a été plongé
dans l'eau, même partiellement. Faites
inspecter l'appareil par un technicien qualifié
et remplacez toute partie du système de
contrôle et toute commande qui ont été
plongés dans l'eau.
Caution
Should overheating occur or the gas supply
fail to shut off, turn off the manual gas control
valve to the heater.
Attention
En cas de surchauffe ou si l'alimentation en
gaz ne s'arrête pas, fermez manuellement le
robinet d'arrêt de l'admission de gaz.
Caution
Keep all objects off the top of the heater.
Blocking air flow could damage the heater,
and may void the warranty.
WARNING
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.
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 relit 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 LD (see Page 17).
3B-2. Model LG (see Page 18).
3C. Setting the Temperature Control
The temperature control (see Figure 18) is
calibrated at the factory and covers a range from
approximately 70°F to 104°F (21°C to 40°C). Use an
accurate pool thermometer to determine the best water
temperature for your uses.
The Laars Lite 2 model LD 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 18). The model
LG has only a single control and is set similarly to the
LD 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.
Model LG & LD Pool and Spa Heater
3B-1. Model LD (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 17
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 18
3B-2. Model LG (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.
WATERPIK TECHNOLOGIES INC.
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 pilotfollow 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 LG & LD Pool and Spa Heater
Page 19
3D. Seasonal Care
Caution
Do not operate this heater outdoors at
temperatures below 20 degrees Fahrenheit
(°F) (-7 degrees Celsius [°C]).
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 minimizes the time required to raise the pool water back up to the desired
temperature.
In areas subject to only short freeze periods, turn
off the heater and run the pump continuously for the
length of the freeze period.
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, or pages
17(LD) or 18(LG) of this manual.
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:
6. Use compressed air to blow out any standing
water remaining in the heat exchanger.
7. Grease the threads on the drain plugs and reinstall plugs, but do not tighten.
8. Disconnect the pressure switch from the siphon
loop (copper tubing) (see Figure 22).
3D-3. Spring Start-up
To restart the heater in the Spring, have a profes-
sional service technician reassemble the heater as
follows:
1. Fill the siphon loop with approximately 5cc of
SAE 50, non-detergent oil. Attach the copper
tubing to the pressure switch (see Figure 22).
2. Tighten the drain plugs.
3. Turn on the filter pump and circulate water
through the heater for 5 minutes. Check for leaks
while circulating.
4. Turn on the main gas supply valve to the heater,
outside the heater jacket.
5. Turn on the heater following the lighting instructions found on the inside of the heater, or pages
17(LD) or 18(LG) of this manual.
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 header
(see Figure 21), loosen the drain plug from the
inlet/outlet header, 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.
Figure 22. Pressure switch copper tubing.
Figure 21. Heater drain locations.
Page 20
WATERPIK TECHNOLOGIES INC.
3E. Water Chemistry
For notes on water chemistry please consult
sections 2G-4, 2G-4a and Table 7 on page 13 of this
manual.
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.
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.
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.
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 4F° (2C°).
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
drowsiness (e.g., tranquilizers, antihistamines, or
anticoagulants) should not use spas or hot tubs.
7. Prolonged immersion in hot water can induce
hyperthermia.
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 drown-
ing
3G. Swimming Pool Energy Saving Tips
Waterpik Laars offers the following recommendations to help conserve fuel and minimize the cost of
operating your pool heater without sacrificing comfort.
1. The American Red Cross recommends a maxi-
mum water temperature of 78°F (25°C). Use an
accurate pool thermometer. A difference of 4F°
(3C°) , between 78°F and 82°F (25°c and 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 tem-
perature control and use the TEMP-LOK to
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 shutdown instructions found on the inside of
the heater.
7. Where possible, shelter the pool from prevailing
winds with well-trimmed hedges or other land-
scaping, cabanas, or fencing.
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:
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.
Model LG & LD Pool and Spa Heater
Page 21
3H. Periodic Inspection
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
Waterpik Laars designs and constructs the Laars
Lite 2 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.
N'utilisez pas cet appareil s'il a été plongé dans
l'eau, même partiellement. Faites inspecter
l'appareil par un technicien qualifié et remplacez
toute partie du système de contrôle et toute
commande qui ont été plongés dans l'eau.
4. If the heater is equipped with a pressure relief
valve, check for corrosion in and around the
valve. With the filter pump on, lift the release
lever on the top of the valve to make sure that
water runs freely through it. If corrosion is found,
replace the pressure relief valve. When replacing
the valve, be sure that the pump is off. Install the
valve so that the discharge is directed away from
any area the may be damaged by water.
5. Be sure all combustion air and ventilation open-
ings are not blocked.
3H-2. Professional Inspection
In addition, annual inspections by a qualified
professional technician are recommended to keep the
heater operating safely and efficiently through the years.
The following basic checks should be performed.
1. Check for loose or broken wires and terminal
connections.
2. Verify pressure switch operation by cycling
the spa pump on and off a few times. The
heater should go off immediately after the
pump stops.
3. Inspect the electrical controls, specifically the
following:
a. High limit controls.
b. Pressure switch.
c. Temperature control.
d. Automatic gas valve.
4. Inspect the venting system for blockage,
leakage, and corrosion.
5. Check for spider webs in the pilot and main
burner orifices - especially at Spring start-up.
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 start-up,
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 2 Heater
4A. General Information
To purchase parts or obtain a comprehensive
maintenance manual for the Laars Lite 2 heater,
contact your nearest Waterpik Laars dealer or
distributor. If they cannot supply you with what you
need, contact the Customer Service Manager,
Waterpik Laars, 21 Pimentel Ct, Novato, California,
94949, Telephone (415) 382-8220 extension 245.
4B. Parts List
The following three pages contain a parts list,
general exploded view and detailed exploded views to
aid in parts identification. Please refer to these pages
when ordering parts for your Laars Lite 2 pool heater.
Page 22
WATERPIK TECHNOLOGIES INC.
Key Model ORDER
No Description No PART NO
1 Pilot, Main Burner Assembly, NAT All R0099100
1 Pilot, Main Burner Assemby, LPG All R0099200
2 Pilot Burner, NAT All R0096700
2 Pilot Burner, LPG All R0096600
3 Pilot Electrode All W0040000
4 Pilot Generator All W0036901
5 Ceramic Insulator Assembly All 10418820
6 Burner, Main w/Pilot Bracket All 10457500
7 High Voltage Lead Assembly All R0099000
8 Pilot Tubing All R0037000
9 Piezo Lighter Assembly All R0096800
10 Pilot Condensate Shield - LG All R0323300
11 Ignitor - LD All R0317200
12 Burner Tray Assy, NAT - LG 125-400 R0098601-05
12 Burner Tray Assy, LPG - LG 125-400 R0098701-05
12 Burner Tray Assy, NAT - LD 125-400 R0316901-05
12 Burner Tray Assy, LPG - LD 125-400 R0319501-05
13 Burner Tray, Shelf Only 125-400 R0317001-05
14 Gas Valve, NAT - LG All R0096400
14 Gas Valve, LPG - LG All R0096900
14 Gas Valve, NAT - LD All R0317100
14 Gas Valve, LPG - LD All R0319600
15 Gas Orifice, NAT 0 - 3,000 ft alt. (EA.) (Note 1) All L0032200
15 Gas Orifice, LPG 0 - 5,000 ft alt. (EA.) (Note 2) All L0032900
16 Anti-Rotation Bracket All 10835900
17 Mounting Bracket Assembly - LG All 10419200
18 Burner, Main All L0052300
19 Burner Manifold 125 L0052200
19 Burner Manifold 175 L0006300
19 Burner Manifold 250 L0006400
19 Burner Manifold 325 L0006500
19 Burner Manifold 400 L0006600
20 Temperature Control Assembly - LG All R0058200
21 Wire Harness All R0058000
22 Plate Assembly All 10457300
23 On-Off Switch All R0099800
24 Temperature Control Label All H0105300
25 Temperature Control Assembly - LD All R0011700
26 Wire Harness Assembly All 10457800
27 Plate Assembly All 10594600
28 Knob, Single Bar All R0099900
29 Temperature Control Label All H0166500
Key Nos. 30- 37 are for both R582 (LG) & R117 (LD)
30 Temperature Sensor All R0011800
31 Protector Sleeve, Bulb All 10444900
32 "O" Ring, Temperature Control Bulb All E0116400
33 Thermostat Knob, Black All R0010700
34 Stop Plate, "Temp-Lok" All 10583100
35 Temperature Control Gasket All S0070000
36 Bezel All S0069800
37 Stop Plate Screw (Not Shown) All F0033300
38 Temperature Sensor Retainer Bracket All 10447300
39 Retainer Bracket Screw All F0009100
40 Pressure Switch & Siphon Loop Assembly (2 PSI) All R0097600
41 Pressure Switch, 2 PSI All R0013200
41 Pressure Switch, 1 PSI All R0011300
41 Pressure Switch, 1-10 PSI All R0015500
42 Siphon Loop Assembly All R0057800
43 High-Limit Switch Assembly All R0023200
44 High-Limit Switch, 135° F All R0022700
45 High-Limit Switch, 150° F All R0023000
46 High-Limit Switch Retainer Boot All S0098900
47 High-Limit Switch Wire Harness All 10419300
48 High-Limit Switch Retainer Clip All 10418400
49 High-Limit Switch Cover All 10418300
50 Fusible Link Assembly All R0012200
51 Fusible Link Bracket All 10479900
52 Terminal Block All R0097800
53 Ignition Control Assembly - LD All R0344600
54 Ignition Control - LD All R0344500
55 Harness Assembly (Not Shown) All R0059800
56 Transformer (115V/220V-24V) (Not Shown) All R0061100
57 Ignition Control Panel (Not Shown) All 10451200
58 In-Line Fuse Assembly (Not Shown) All 10480000
PILOT/IGNITER SYSTEM
MAIN GAS ASSEMBLY
ELECTRICAL SYSTEM
Key Model ORDER
No Description No PART NO
VENT SYSTEM
59 Top Enclosure 125-400 R0343401-05
60 Top Filler Plate (US Only) 125-400 R0343701-05
61 Rainshield Kit (US Only) 125-400 R0318301-05
61 Rainshield Kit (Canada Only) 125-400 R0318311-15
62 Flue Collector Assembly (US Only) 125-400 R0316401-05
62 Flue Collector Assembly (Canada Only) 125-400 R0316406-10
63 Outdoor Vent Cap (US Only) 125-400 10561501-05
63 Outdoor Vent Cap (Canada Only) 125-400 10561511-15
64 Indoor Drafthood (US Only) 125-400 10561401-05
64 Indoor Drafthood (Canada Only) 125-400 10561411-15
65 Flue Transition Plate (US Only) 125-400 10861901-05
66 Adapter Plate 125-400 10535301-05
67 Clip All 10211000
68 Flue Collector Hold Down Clamp All 10726000
WATER SYSTEM
69 Inlet/Outlet Header, 2" All R0056400
69 Inlet/Outlet Header, Bronze, 2" All R0016800
70 Return Header (Includes set of 9 gaskets) All R0058300
70 ReturnHeader, Bronze (Includes set of 9 gaskets) All R0054600
71 Header Bolt Assembly (Set of 8) All R0057000
72 Bolt for Headers, 2 1/2" All F0046100
73 Washer for Headers All F0011100
74 Nut for Headers All F0003100
75 Header Gasket Assembly (Set of 18) All R0050800
76 Flange & Gasket Assembly (Set of 2 ) All R0055000
77 Flange, 2" All 10573500
78 Flange Gasket, 2" All S0078000
79 Flange Sleeve, 2" All S0078200
80 Flange Bolt All F0031700
81 Flange Gasket, 1 1/2 - 2" All S0078100
82 Rubber Grommet for Drain Plug All R0316300
83 Grommet, Slitted (Not Shown) All S0071100
84 Brass Connector Body All P0019701
85 Brass Drain Plug 1/4" All P0026800
86 Brass Plug, 3/4" All P0027000
87 By-Pass Assembly w/o spring (Iron Cap) All R0013100
87 By-Pass Assembly with spring (Bronze Cap) 125-400 10701401-05
88 By-Pass Valve Rod All S0079800
89 Brass Nut (For Rod) All F0048400
90 By-Pass Valve Disc All R0011500
91 By-Pass Valve Control Cap (Iron) All 10452200
91 By-Pass Valve Control Cap (Bronze) All 10557400
92 Control Cap Bolts (2 Required) All F0041600
93 By-Pass Valve Spring, Purple 125 S0079900
93 By-Pass Valve Spring, White 175 S0061400
93 By-Pass Valve Spring, Red 250 S0061300
93 By-Pass Valve Spring, Blue 325 S0061200
93 By-Pass Valve Spring, Black 400 S0070100
94 By-Pass Valve Gasket All R0011400
95 Heat Exch. Tube Assy. (Incl. set of 18 gaskets) 125-400 R0018101-05
96 Heat Exchanger Baffle (8 Required) 125-400 10697401-05
97 Baffle Retainer All S0083900
98 Heat Exchanger Support Clip (2 Required) All 10457000
99 Flow Restrictors (2 Required) (Not Shown) 125 S0000300
100 Heat Exchanger End Baffles (2 Required) 125-400 R0332301-05
FIREBOX COMPONENTS
101 Complete Combustion Chamber Assy. 125-400 R0316701-05
JACKET COMPONENTS
102 Door with Latch 125-400 R0343601-05
103 Jacket Assembly, Less Top Assembly 125-400 R0343501-05
104 Gap Closure, Inlet/Outlet All R0344300
105 Gap Closure, Return All R0344400
106 Button Plug, 1-3/4" All F0035300
107 Button Plug, 7/8" All F0032300
108 Button Plug, 2" (With hole for gas line) All F0056600
OPTIONAL COMPONENTS
Non Combustible Base 125-400 10521701-05
Pressure Relief Valve 3/4" NPT, 75 PSI All R0040400
Touch Up Spray Paint, Light Beige All X0021100
Flame Sense Rod, Retrofit All R0334300
Igniter Condensate Shield, Retrofit - LD All R0334200
Notes:
1. For altitudes 2,000 Ft above sea level, call factory for orifice size.
2. For altitudes 5,000 Ft above sea level, call factory for orifice size.
Model LG & LD Pool and Spa Heater
Page 23
63
64
67
66
65
UNITED STATES
105
85
60
UNITED STATES
UNITED STATES
59
61
CANADA
62
CANADA
HEAT EXCHANGER
SEE NEXT PAGE FOR DETAIL
TEMPERATURE CONTR0L
SEE NEXT PAGE FOR DETAIL
102
BURNER TRAY
(LD SHOWN)
SEE NEXT PAGE
FOR DETAIL
108
82
11
51
10
50
52
104
82
85
106
9
53
54
107
103
101
Page 24
39
30
41
42
40
38
84
32
31
69
43
44
47
45
86
78,81
48
49
79
89
90
77
93
76
88
80
85
92
94
87
91
SHOWN)
23
WATERPIK TECHNOLOGIES INC.
20
(LG
22
24
34
36
27
25
(LD
SHOWN)
33
29
28
74
73
71
72
98
68
70
75
96
16
95
14
72
97
75
18
73
33
74
69
35
34
26
1
2
6
5
4
3
13
15
12
(LG
SHOWN)
19
8
7
17
Model LG & LD Pool and Spa Heater
Page 25
NOTES
LIMITED WARRANTY
Thank you for purchasing Jandy® pool and spa products. Waterpik Technologies (manufacturer of Jandy
products, including Laars® pool and spa heaters) warrants all parts to be free from manufacturing defects in
materials and workmanship for a period of one year from the date of retail purchase, with the following
exceptions:
AquaLink
•
NeverLube
•
®
RS units installed with Jandy Surge Protection Kits will be covered for two years.
®
valves are warranted for the life of pool and/or spa on which they were originally installed.
This warranty is limited to the first retail purchaser, is not transferable, and does not apply to products that have
been moved from their original installation sites. The liability of Waterpik Technologies shall not exceed the repair
or replacement of defective parts and does not include any costs for labor to remove and reinstall the defective
part, transportation to or from the factory, and any other materials required to make the repair. This warranty does
not cover failures or malfunctions resulting from the following:
1. Failure to properly install, operate or maintain the product(s) in accordance with our published Installation,
Operation and Maintenance Manuals provided with the product(s).
2. The workmanship of any installer of the product(s).
3. Not maintaining a proper chemical balance in your pool and/or spa [pH level between 7.2 and 7.8, Total
Alkalinity (TA) between 80 to 120 ppm, Total Dissolved Solids (TDS) less than 2000].
4. Abuse, alteration, accident, fire, flood, lightning, rodents, insects, negligence or acts of God.
5. Scaling, freezing, or other conditions causing inadequate water circulation.
6. Operating the product(s) at water flow rates outside the published minimum and maximum specifications.
7. Use of non-factory authorized parts or accessories in conjunction with the product(s).
8. Chemical contamination of combustion air or improper use of sanitizing chemicals, such as introducing
sanitizing chemicals upstream of the heater and cleaner hose or through the skimmer.
9. Overheating, incorrect wire runs; improper electrical supply; collateral damage caused by failure of O-Rings,
DE grids, or cartridge elements; or damage caused by running the pump with insufficient quantities of water.
LIMITATION OF LIABILITY:
This is the only warranty given by Waterpik Technologies. No one is authorized to make any other warranties on
Waterpik Technologies' behalf. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF FITNESS FOR A
PARTICULAR PURPOSE AND MERCHANTABILITY. WATERPIK TECHNOLOGIES EXPRESSLY DISCLAIMS
AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT OR PUNITIVE
DAMAGES FOR BREACH OF ANY EXPRESSED OR IMPLIED WARRANTY. This warranty gives you specific
legal rights. You may also have other rights which vary by state or province.
WARRANTY CLAIMS:
For prompt warranty consideration, contact your dealer and provide the following information: proof of purchase,
model number, serial number and date of installation. The installer will contact the factory for instructions
regarding the claim and to determine the location of the nearest designated service center. If the dealer is not
available, you can locate a service center in your area by visiting www.jandy.com or by calling our technical
support department at (707) 776-8200 extension 260. All returned parts must have a Returned Material
Authorization number to be evaluated under the terms of this warranty.
H0235900-
6000 Condor Drive • Moorpark, CA USA 93021
480 S. Service Road West • Oakville, Ontario, Canada L6K 2H4
A Waterpik Technologies Company
• 707.776.8200 •Fax 707.763.7785
• 905.844.8233 • Fax 905.844.2635
Litho in USA ©Waterpik Technologies 0406
Loading...