Jandy Laars LT250 Installation And Operation Manual Download Page 2

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SECTION 1
General Information

Introduction ............................................................ 1

Description ............................................................. 1

Warranty ................................................................ 1

SECTION 2
Installation Instructions

General Requirements .......................................... 1

2A-1

Special Precautions ............................................... 1

Heater Assembly and Preparation ........................ 1

Heater Location ..................................................... 2

2C-1

Installation Information .......................................... 2

2C-2

Installation Clearances .......................................... 2

2C-3

Flooring Typical Installation ................................... 2

Outdoor Installation ............................................... 3

Outdoor Shelter Installation (Canada) ................... 3

Indoor Installation .................................................. 3

2F-1

Preparation of Heater For
Indoor Installation .................................................. 3

2F-2

Special Location Requirement .............................. 4

2F-3

Air For Combustion and Ventilation ...................... 4

2F-4

Exhaust Venting .................................................... 4

2F-4a

Important Information On Vent Pipe Sizing ........... 4

2F-4b

Vent Pipe Sizing and Installation ........................... 5

Gas Supply and Piping .......................................... 5

2G-1

General Instructions .............................................. 5

2G-2

Special Precautions For Propane Gas .................. 8

Electrical Power ..................................................... 8

2H-1

General Information ............................................... 8

2H-2

Bonding ................................................................. 8

2H-3

Auxiliary Time Clock Wiring ................................... 8

2H-4

Remote Operation ................................................. 9

Water Piping ........................................................ 10

2I-1

Reversal of Heater Water Connections ............... 10

2I-2

Pool/Spa Piping Systems .................................... 13

2I-3

Connections at Heater ......................................... 13

2I-4

Pressure Relief Valve .......................................... 14

2I-5

Automatic Chlorinators (Chemical Feeders) ....... 15

Start-Up and Adjustment ..................................... 15

2J-1

Normal Operation ................................................ 15

2J-2

Start-Up ............................................................... 15

2J-3

Gas Pressure ....................................................... 16

2J-4

Adjustment of Water Pressure Switch ................ 16

2J-5

Water Temperature Rise ..................................... 17

SECTION 3
Operating Instructions

Start-Up Procedure .............................................. 18

Temperature Controls ......................................... 18

3B-1

Information Displayed .......................................... 19

3B-2

Turning The Heater On Or Off ............................. 19

3B-3

Setting Pool And Spa Temperatures And
Changing From Fahrenheit To Celcius ............... 19

3B-4

Error Status ......................................................... 19

Lighting and Shutdown ........................................ 21

3C-1

Lighting the Heater .............................................. 21

3C-2

Shutdown ............................................................. 21

Water Chemistry .................................................. 21

3D-1

Pools .................................................................... 21

3D-2

Spas .................................................................... 21

3D-2a

Spa Water Chemistry .......................................... 23

3D-2b

Water Changing .................................................. 23

3D-2c

Corrosion ............................................................. 23

3D-2d

Testing ................................................................. 23

Spa/Hot Tub Safety Rules ................................... 23

Swimming Pool Energy Saving Tips ................... 23

Seasonal Care ..................................................... 24

3G-1

Spring and Fall Operation ................................... 24

3G-2

Winterizing ........................................................... 24

Periodic Inspection .............................................. 24

3H-1

Owner Inspection ................................................. 24

3H-2

Professional Inspection ....................................... 25

SECTION 4
Specifications and Dimensions

General Information ............................................. 25

4A-1

Specifications ...................................................... 25

4A-2

Dimensions .......................................................... 25

SECTION 5
Replacement Parts

5A.

General Information ............................................. 26

Part Numbers ...................................................... 26

Exploded View Of Heater .................................... 27

5C-1

Overview Exploded View ..................................... 27

5C-2

Detail Exploded View .......................................... 28
Warranty ................................................ Back Cover

TABLE OF CONTENTS

Summary of Contents for Laars LT250

Page 1: ...t 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 WHAT TO DO IF YOU SMELL GAS Do not...

Page 2: ...ef Valve 14 2I 5 Automatic Chlorinators Chemical Feeders 15 2J Start Up and Adjustment 15 2J 1 Normal Operation 15 2J 2 Start Up 15 2J 3 Gas Pressure 16 2J 4 Adjustment of Water Pressure Switch 16 2J...

Page 3: ...uded in a plastic bag inside the heater and on the back cover of this manual The home owner should fill out the warranty registration card included in the plastic bag and return it to Waterpik Technol...

Page 4: ...roper operation 2C Heater Location 2C 1 Installation Information The LX and LT can be installed outdoors or indoors as outlined in later sections In either case location must be selected with consider...

Page 5: ...so apply such as provision of ample uncontaminated air for combustion and ventilation 2F Indoor Installation 2F 1 Preparation of Heater for Indoor Installation If the LX or LT is to be installed indoo...

Page 6: ...Codes for Gas Appliances CAN 1 B149 1 2 Undersize pipe can result in inadequate venting and oversize pipe can result in vent condensation In either case the result can be release of combustion produc...

Page 7: ...be a Category I Fan Assisted appliance They are intended for standard vertical venting per tables provided in most local codes for Category I Fan Assisted appliances If the local code does not include...

Page 8: ...ximum 10 5 2 7 14 3 5 Figure 7 The Proper Design for a Sediment Trap Drip Leg Table 4 Natural Gas Pipe Size Requirements Distance from Gas Meter 0 50 feet 50 100 feet 100 200 feet Heater 0 15 m 15 30...

Page 9: ...MP SENSOR J4 1 J4 2 0 6 1 6 1 7 5 7 5 32 5 6285 5 5 3 5 5 3 5 5 5 3 5 5 3 5 5 5 5 5 5 5 5 5 5 2 8 1 6 5 5 2 8 1 6 5 1 6 5 9 1 1 7 9 3 6 3 6 9 1 7 9 1 7 3 6 3 6 0 9 0 9 0 9 0 9 7 5 3 5 6 6 8 5 6 7 0 7...

Page 10: ...connected to either tab on the terminal block the connections are not polarity sensitive Plug the fifteen pin connector into the receptacle The connector is keyed so it will fit in only one orientatio...

Page 11: ...it A number will appear on the display for approximately 5 seconds This first number can be ignored After the first number disappears a second number will appear in the display window It will consist...

Page 12: ...r is disabled The heater functions can be controlled only at the RS unit However sensor data is displayed at both the heater and the RS unit To temporarily use the heater controls use a thin object to...

Page 13: ...ntrol panel There are quick disconnects at the end of the wires 15 Remove the inlet outlet header side cover plate located under the inlet outlet header There are four philips head screws one in each...

Page 14: ...one in each corner 26 Route the wires that attach to the temperature sensor along the copper siphon loop back to the right side of the heater Reconnect the wires to the tabs on the back of the control...

Page 15: ...e top of the heater Be careful not to pinch any wires Replace the two screws on the bottom flange to hold the cover in place 47 Replace the front panel door 2I 2 Pool Spa Piping Systems Figure 15 illu...

Page 16: ...Technologies PRV kit into the blind threaded hole on the top of the inlet outlet header 2 Using the countersink in the center of the blind hole as a guide drill a 1 4 inch hole through the plastic 3 O...

Page 17: ...ton until the indicator on the LCD screen aligns with OFF Now press and release the button again until the indicator on the LCD screen aligns with the desired setting either POOL or SPA To reset the m...

Page 18: ...f Setting the switch to close at too low of a flow can damage the appliance Do not operate this heater outdoors at temperatures below 20 degrees Fahrenheit F 7 degrees Celsius C 2J 2 Start up Confirm...

Page 19: ...ow even though flow through the filter system will vary depending on how dirty the filter is For most installations an external bypass valve is not needed in the heater water piping This is due to the...

Page 20: ...from this reading This difference is the temperature rise Refer to Table 8 If your measured temperature rise is within the range designated for your heater skip steps 6 through 8 6 Locate the bypass a...

Page 21: ...n there is water flowing through the heater the filter pump is on the water temperature is displayed in the right most of two bar graphs in the center of the screen This bar graph is labeled as Water...

Page 22: ...he heater is OFF It is now necessary to set the thermostat to the desired pool or spa setting 3B 3 Setting Pool and Spa Temps Changing from Fahrenheit to Celsius The Model LX heater displays temperatu...

Page 23: ...switch 1 Broken split pinched or disconnected fan switch tubing 1 Check tubing and replace if necessary 2 Fan not operating 2 Correct fault or replace fan Refer to qualified service personnel 3 Fan ru...

Page 24: ...lve control knob counterclockwise to ON see Figure 22 5 Replace the heater door 6 Turn on electrical power to the heater 7 Turn on the filter pump 8 Set the heater controls to the SPA position mode If...

Page 25: ...to next step 8 Turn gas control knob counterclockwise to ON 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 lig...

Page 26: ...e week It should be reset to the 78 F 26 C level before expected usage keeping in mind to allow enough lead time for the water to reach the desired temperature 3D 2a Spa Water Chemistry Maintaining sa...

Page 27: ...ater is not going to be used for a long period of time shut it down completely following the instructions in Section 3C 2 Shutdown or the lighting and shutdown instructions posted inside the heater 3G...

Page 28: ...erature control g Control circuit fuse 6 Perform a temperature rise test in accordance with Section 2J 5 7 If the heater is equipped with a pressure relief valve clean any accumulated corrosion and ma...

Page 29: ...0444900 33 RetainerBracket Temp Sensor All 10447300 34 Screw RetainerBracket All F0009100 35 IgnitionControl All R0328800 36 Pressure Switch Assy All R0334500 37 Pressure Switch 2 psi All R0013200 38...

Page 30: ...EE NEXT PAGE FOR DETAIL 20 21 22 23 25 SEE NEXT PAGE FOR DETAIL 44 54 55 57 SEE NEXT PAGE FOR DETAIL 58 59 60 60 61 63 64 65 66 67 68 69 70 71 72 73 10 9 SEE NEXT PAGE FOR DETAIL 45 24 62 74 56 36 38...

Page 31: ...LX and LT Pool Heaters Page 29 2 3 4 5 7 8 11 11 12 16 17 15 18 19 14 35 27 29 37 42 40 41 52 53 51 32 31 30 34 33 43 43 6 5C 2 Detail View 77...

Page 32: ...orized 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 th...

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Jandy Laars LT250, Installation And Operation Manual, Page: 2 / 32

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