Laars - Geisel
Contents
1. 2 2 2 2 38 Control Mounting Panel 20013700 20013700 20013700 20013700 20013700 20013700 20013700 39 Control Cover Front 20018700 20018700 20018700 20018700 20018700 20018700 20018700 40 Control Box Cover Top 20011200 20011200 20011200 20011200 20011200 20011200 20011200 41 Pilot Lead Assembly Johnson 20035403 20035403 20035403 20035403 20035403 20035403 20035403 Standing Pilot Nat Propane 2 2 2 2 2 Pilot Lead Assembly Honeywell 20035404 20035404 20035404 20035404 20035404 20035404 20035404 Standing Pilot Nat Propane 2 2 2 2 2 Pilot Lead Assembly Johnson 20035401 20035401 20035401 20035401 20035401 20035401 20035401 IID Pilot Nat 2 2 2 2 2 Pilot Lead Assembly Honeywell 20035402 20035402 20035402 20035402 20035402 20035402 20035402 IID Pilot Nat 2 2 2 2 2 42 Pilot Shield 20016400 20016400 20016400 20016400 20016400 20016400 20016400 2 2 2 2 2 43 Draft Hood Relief 20013801 20013801 20013801 20013801 20013802 20013803 20013804 Baffle Right indoor only 2 2 2 2 2 2 2 44 Draft Hood Relief 20013805 20013805 20013805 20013805 20013806 20013807 20013808 Baffle Right indoor only 2 2 2 2 2 2 2 45 Manual Valve V0001800 V0001800 V2013800 V2013800 V2013800 V2013900 V2013900 46 Safety Valve U S V0046800 V0046800 V0046900 V0046900 V0046900 V2000500 V2000500 Lubricated Plug Valve Canada V0020500 V0020500 V0020600 V0020500 V0020500 V002052. Area indicated is for one of two openings one at floor level and one at the ceiling so the total net free area would be double the figures indicated For all other conditions refer to latest edition of ANSI A223 1 NOTE Check with louver manufacturers for Net Free Area of louvers Correct for screen resistance to the Net Free Area if a screen is installed Check all local codes applicable to combustion air Table 2 Minimum Recommended Air Supply to Equipment Room If a blower or fan is used to supply air to the equipment room the installer should make sure it does not create drafts which could cause nuisance shut downs of the pilot If a blower is necessary to provide adequate combustion air to the boiler a suitable switch or equivalent must be wired into the boiler control circuit to prevent the boiler from firing unless the blower is operating The boiler must be completely isolated and protected from any source of corrosive chemical fumes such as emitted by trichlorethylene perchlorethylene chlorine etc Mighty Therm Commercial Pool Heating Boiler Page 5 2B 2 Venting 1 Laars boilers have built in draft diverters for natural draft operation and must not be connected into any portion of a mechanical draft system under positive pressure The flue outlet must be connected to a clear unobstructed vent of adequate capacity terminating above the highest point of the building with an approved vent cap The venting
3. I 24501 30501 35001 40501 4500 5000 2200 E 2800 E 3200 E 3600 E 4000 E 4500 E 3 Base Weldment Assembly 20067201 20067202 20067203 20067204 20067205 20067206 20067207 Base Assembly 20011001 20011002 20011003 20011004 20011005 20011006 20011007 Center Heat Shield Assembly 20005701 20005702 20005703 20005704 20005705 20005706 20005707 3a Center Heat Shield Panel 20005601 20005602 20005603 20005604 20005605 20005606 20005607 2 2 4 End Tile Rail Support Left 20011101 20011101 20011101 20011101 20011101 20011101 20011101 4a End Tile Rail Support Right 20011102 20011102 20011102 20011102 20011102 20011102 20011102 5 Manifold Assy Single 20064301 20064201 20064401 20064501 20064600 20064700 20064800 Manifold Assy Split 20064302 20064202 20064402 20064502 20064600 20064700 20064800 6a Pilot Burner Bracket 20012600 20012600 20012600 20012600 20012600 20012600 20012600 Welder 2 2 2 2 2 6b Main Burner without L2005800 L2005800 L2005800 L2005800 L2005800 L2005800 L2005800 pilot bracket 22 27 32 37 44 48 54 y Inner Shield 20002300 20002300 20002300 20002300 20002300 20002300 20002300 2 2 2 2 2 2 2 8 End Tile Channel 20002600 20002600 20002600 20002600 20002600 20002600 20002600 2 2 2 2 2 2 2 9 Front Lower Closure 20004301 20004302 20004303 20004304 20004305 20004306 20004307 10 Rear Tile Rail Assembly 20011401 20011402 20011403 20011404 20011405 20011406 20011407 11 Front Til
4. When such wind conditions are possible locate the unit at least three 3 feet from the structures Never install the boiler under any kind of roof overhang Do not locate the unit below or adjacent to any doors windows louvers grills etc which communicate in any way with an inhabited area of a building Even though such communication might be through another structure such as a garage or utility room see Figure 4 w sd Window Or Grill Indoor Room Figure 4 Incorrect Outdoor Installation Page 6 LAARS HEATING SYSTEMS 4 Liquified petroleum is heavier than air Therefore the pool boiler should not be installed in pits or other locations where gas could accumulate The boiler should be located a safe distance from LP gas storage and filling equipment Consult local codes and fire protection authorities for advice relative to specific installation restrictions 2D Freeze Protection Boiler installations are not recommended in areas where the danger of freezing exists unless proper precautions are made for freeze protection 2E Gas Supply and Piping Review the following instructions before proceeding with the installation 1 Verify that the boiler is fitted for the proper type of gas by checking the rating plate Laars boilers are normally equipped to operate below a 2000 foot altitude Boilers equipped to operate at higher altitudes h
5. of the gas supply piping system at test pressures equal to or less than 1 2 psig 5 Provide gas supply pressure to the boiler as follows Natural Propane Min inches water column 7 11 Max inches water column 9 14 Note The boiler and all other gas appliances sharing the gas supply line must be firing at maximum capacity to properly measure the inlet supply pressure Low gas pressure could be an indication of an undersized gas meter and or obstructed gas supply line 6 Thecorrect burner manifold gas pressure is stamped on the rating plate The regulator is preset at the factory and normally requires no further adjustment 7 The gas manifold and control assembly was tested and conforms to the safe lighting and other performance criteria specified in the latest editions of ANSI Z21 13 and CGA 3 3 Low Pressure Boiler Standard 8 Before operating the boiler the complete gas supply system and all connections must be tested for leaks using a soap solution Do not use raw flame A Caution Since some leak test solutions including soap and water may cause corrosion or stress cracking the piping must be rinsed with water after testing unless it has been determined that the leak test solution is noncorrosive Mighty Therm Commercial Pool Heating Boiler Page 7 Note Main Gas Valves Incorporate Gas Pressure Regulators Pilot Gas Valve Pilot Gas Filter Pilot Gas Pr
6. on other than a non combustible surface when such an installation complies with the local codes This code specifies the surface under the boiler be protected with hollow masonry no less than 4 thick covered with sheet metal at least 20 gage in thickness Such masonry must be laid with ends unsealed and joints matched in such a way as to provide a free circulation of air from side to side through the masonry see Figure 2 Clearance Indoor Outdoor From Inches Inches Top 24 Water Conn Side 24 24 Opposite Side 24 24 Front 48 48 Rear 24 24 Vent 6 Metal Plate 20 Base Must Extend Out c Ga Min Min 12 On All Sides Under Entire Of Boiler Frame Boiler Concrete Blocks Or Tile Min 7 High With 3 Min Air Openings Blocks must provide solid base and be braced so they cannot slip out of place Air openings in blocks must be arranged to provide unobstructed opening through entire width or length of base Table 1 Minimum Boiler Clearance From Combustible Surfaces cause accelerated deterioration of controls and electrical components Exhaust Fans or Vents Any equipment which exhausts air from the boiler room can deplete the combustion air supply or reverse the natural draft action of the venting system This could cause flue products to accumulate in the room Additional air must be supplied to compensate for such exhaust The information in Table 2 is not applicable in inst
7. system should be installed according to the latest edition of ANSI Z223 1 or CANI B149 and any local codes having jurisdiction IMPORTANT NOTE Do not use sheet metal screws at the snap lock joints of Type B gas vents 2 Donot weld or fasten the vent pipe to the boiler draft hood The weight of the stack must not rest on the boiler The draft hood and top must be easily removable for normal boiler service and inspection 3 Avoid long horizontal runs of the vent pipe and too many 90 degree elbows reductions and restrictions Horizontal runs should have at least a 1 4 rise per foot in the direction of flow A vent connector shall be supported for the design and weight of the material employed to maintain clearances and prevent physical damage and separation of joints 4 Avoid terminating boiler vents near air conditioning or air supply fans The fans can pick up exhaust flue products from the boiler and return them inside the building creating a possible health hazard A minimum of 4 feet horizontal distance must be maintained from electric meters gas meters and relief equipment 5 Always use double wall or insulated vent pipe Type B or equivalent In cold weather uninsulated outside vents can chill the rising flue products blocking the natural draft action of the venting system This can create a health hazard by spilling flue products into the boiler room 6 Avoid oversize vent piping or extremely long run
8. 0 W0034300 W0034300 IID Pilot Nat 2 2 2 2 2 a Me Rod retainer Spring 101337 Spring shaft Spring guide S001906 S001106 OUT Supply to the pool I 1 Main casting y i N S 20002 gt E r T d Ez nM outlet li IN Return To heater inlet from the pool Figure 14 Built in Automatic Control Valve 17 17 17 17 17 17 13 75 T2003902 12003802 72003802 12003902 50001 4500E Assembly 20052507 S H roseo L _raoosooe _r200s002 L H 10 17 17 17 17 17 8 25 45001 4000E Assembly 20052506 72006502 72004002 72004002 72004002 72004002 72004002 72007002 47 47 47 47 72003802 12003902 72003902 12003802 40501 3600E Assembly 20052505 T2006402 72004002 72004002 72004002 72004002 72007002 17 17 17 17 12 75 35001 3200E Assembly 20052504 Ee rananz I caes ramen T rz I X 30501 2800E Assembly 20052503 12006502 T2004002 E T2004002 L T2004002 T2006802 iz 17 17 7 38 oo T2003902 T2003802 T2003802 T2003902 T2003902 12003802 T2003802 T2003902 T2003802 T2003902 T2003902 T2003802 14 38 17 47 2000 Assembly 20052501 H 2008002 ze 24501 2200E Assembly 20052502 S nd rase ane E nl Figure 15 Tile Assembly 72003802 12003902 72003902 12003802 CEO NSEZ Mecraaitation 150 9002 1994 REGISTERED COMPANY
9. 00 V0020500 2 2 2 2 47 Operating Valve V0047800 V0047800 V0047900 V0047700 V0047800 V0047800 V0047800 2 2 2 2 I Indoor E Outdoor Quantity is 1 unless otherwise noted Mighty Therm Commercial Pool Heating Boiler Page 19 T Key Size Size Size Size Size Size Size No Description 2000 I 2450 I 3050 I 3500 I 4050 I 4500 I 5000 I 2200 E 2800 E 3200 E 3600 E 4000 E 4500 E 48 Manual Pilot Valve W0002100 W0002100 W0002100 W0002100 W0002100 W0002100 W0002100 2 2 2 2 2 49 a Pilot Valve l l D W0019300 W0019300 W0019300 W0019300 W0019300 W0019300 W0019300 not shown 2 2 2 2 2 49 b Pilot Relay Standing Pilot W003000 W003000 W003000 W003000 W003000 W003000 W003000 not shown 2 2 2 2 2 50 Pilot Burner Johnson W0034700 W0034700 W0034700 W0034700 W0034700 W0034700 W0034700 Standing Pilot Nat 2 2 2 2 2 Pilot Burner Honeywell W0034800 W0034800 W0034800 W0034800 W0034800 W0034800 W0034800 Standing Pilot Nat 2 2 2 2 2 51 Pilot Burner Johnson W0034600 W0034600 W0034600 W0034600 W0034600 W0034600 W0034600 Standing Pilot Propane 2 2 2 2 2 Pilot burner Honeywell W0034400 W0034400 W0034400 W0034400 W0034400 W0034400 W0034400 Standing Pilot Propane 2 2 2 2 2 52 Pilot Burner Johnson W0034500 W0034500 W0034500 W0034500 W0034500 W0034500 W0034500 IID Pilot Nat 2 2 2 2 2 Pilot Burner Honeywell W0034300 W0034300 W0034300 W0034300 W003430
10. 26 Heat Exchanger Baffle F amp R 10534310 10534311 10534312 10534313 10534314 10534315 10534316 2 2 2 2 2 2 2 27 Front amp Rear Closure 20006401 20006402 20006403 20006404 20006405 20006406 20006407 2 2 2 2 2 2 2 28 Inside Baffle Assembly Indoor 20012501 20012502 20012503 20012504 20012505 20012506 20012507 Outdoor N A 20012509 20012510 20012511 20012512 20012513 20012514 29 Flue Panel Assembly F amp R 20011501 20011502 20011503 20011504 20011505 20011506 20011507 2 2 2 2 2 2 2 30 Upper Panel 20011701 20011702 20011703 20011704 20011705 20011706 20011707 F amp R indoor only 2 2 2 2 2 2 2 31 Flue Diverter Assembly 20012201 20012202 20012203 20012204 20012205 20012206 20012207 indoor only 32 Upper Wing 20006301 20006301 20006301 20006301 20006301 20006301 20006301 F amp R Left indoor only 2 2 2 2 2 2 2 33 Upper Wing 20006302 20006302 20006302 20006302 20006302 20006302 20006302 F amp R Right indoor only 2 2 2 2 2 2 2 34 Top Panel Assembly 20012301 20012302 20012303 20012304 20012305 20012306 20012307 indoor only 35 Flue End Assembly 20012000 20012000 20012000 20012000 20012000 20012000 20012000 2 2 2 2 2 2 2 36 Upper End Assembly 20011900 20011900 20011900 20011900 20011900 20011900 20011900 2 2 2 2 2 2 2 37 Lower End Panel Assembly 20011800 20011800 20011800 20011800 20011800 20011800 20011800 2 2 2
11. CTION 6 SECTION 3 Conversion of Model AP Pool Boilers Operation From Indoor to Outdoor Models 3A Initial Start U 9 6A SECTION l sissisodan nininini aieiaa 14 PEE Ea E ow CRM 8B SECTION II 14 3A 1 Initial Filter Cycle on a New Pool 9 3A 2 Starting Instructions sse eee eee eee 9 3A 3 Hi Limit Checkout e 10 SECTION 7 3B To Start Up System Parts Description and See Section 3A for Initial Start Up 10 Order Numbers 3C To Turn Off Boiler ereer Been Oeste CIR DAUERN SUS 16 Mighty Therm Commercial Pool Heating Boiler Page 3 SECTION 1 General Information AXIMPORTANT WARNING The Model AP commercial pool boilers must be used with potable water only For pools containing salt water a specially equipped boiler must be used Consult your distributor or factory representative The pool boiler must be installed in accordance with the procedures in this manual or the warranty could be voided Consult local building codes and ANSI bulletin 2223 1 or in Canada CAN1 B149 before proceeding with the installation Any modification to the boiler its gas controls gas orifices wiring or draft diverter may void the Laars warranty Consult the factory before making any modifications 1A Introduction This manual provides information for the installation and operation of Laars Model AP Pool Boilers It is strongly recommended that all application and installation proced
12. Cap Screw Hex Hd F0024500 F0024500 F0024500 F0024500 F0024500 F0024500 F0024500 Ya 18UNC x 2 8 8 8 8 8 8 8 21g Return Header 10416100 10416100 10416100 10416100 10416100 10416100 10416100 21h Gasket Header 0095300 0095300 0095300 0095300 0095300 0095300 0095300 21j Cap Screw Hex Hd F0013300 F0013300 F0013300 F0013300 F0013300 F0013300 F0013300 Ve 13UNC x 1 36 36 36 36 36 36 36 21k Washer 1 2 F0010300 F0010300 F0010300 F0010300 F0010300 F0010300 F0010300 36 36 36 36 36 36 36 I Indoor E Outdoor Quantity is 1 unless otherwise noted Page 17 Mighty Therm Commercial Pool Heating Boiler te o 9 2 e iL o o o D 2 i o LL x H Indoor parts only Figure 13 Parts Identification Page 18 LAARS HEATING SYSTEMS Key Size Size Size Size Size Size Size No Description 2000 2450 3050 3500 4050 4500 5000 2200 E 2800 E 3200 E 3600 E 4000 E 4500 E 22 Lock Washer s F0010800 F0010800 F0010800 F0010800 F0010800 F0010800 F0010800 2 2 2 2 2 2 2 23 Washer 9 5 F0011100 F0011100 F0011100 F0011100 F0011100 F0011100 F0011100 2 2 2 2 2 2 2 24 Cap Screw F0015900 F0015900 F0015900 F0015900 F0015900 F0015900 F0015900 Sd 16UNC x 94 2 2 2 2 2 e 25 Heat Exchanger Baffle Assembly 20010900 20010900 20010900 20010900 20010900 20010900 20010900 68 68 68 102 102 102 102
13. H2000000E Installation and Operation Instructions Document 3094E Installation and Operation Instructions for Mighty Therm Pool Heating Boiler Model AP Sizes 2000 5000 These instructions are to be stored in the packet provided on the boiler FOR YOUR SAFETY This product must be installed and serviced by a professional service technician qualified in hot water boiler installation and maintenance 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 AWARNING If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or loss of life 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 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 supplier s instructions If you cannot reach your gas supplier call the fire department I
14. NES T CERT No 97 1073 H go mov Waterpik Technologies Inc 6000 Condor Drive Moorpark CA 93021 805 529 2000 FAX 805 529 5934 E SYSTEMS 20 Industrial Way Rochester NH 03867 603 335 6300 FAX 603 335 3355 HEATING T 480 S Service Road West Oakville Ontario Canada L6K 2H4 905 844 8233 FAX 905 844 2635 www laars com Litho in U S A Laars Heating Systems 0002 Document 3094E
15. Persons with medical history of heart disease circulatory problems diabetes or blood pressure problems diabetes or blood pressure problems should obtain their physician s advice before using spas or hot tubs 6 Persons taking medications which induce drowsiness such as tranquilizers antihistamines or anticoagulants should not use spas or hot tubs 3H Periodic Service Inspect the heat exchanger tubes of the Model AP pool boiler on a regular basis In most areas and under most operating conditions the AP pool boiler will operate for years without accumulating any scale in the tubes However in some pools the mineral content of the water is such that completely scale free operation is impossible For this reason the AP boiler was designed so that all of the internal wet surfaces can be easily inspected and if necessary cleaned Simple cleaning tools are available from your dealer or the factory In order to establish a proper inspection schedule the tubes should be inspected after the first sixty days of operation and again after 120 days From the appearance of the tubes it will be possible to determine the best regular inspection schedule When pool equipment is located outdoors a certain amount of dust and moisture can infiltrate the mechanical parts of the controls After many years this could cause deterioration A regular service schedule will insure longer life and safe operation of the equipment 3l Pool Water C
16. Possible Cause What To Do Electric gas valve operator is burned out or shortened Disconnect wiring harness at gas valve terminals Check continuity to actuator coil If open circuit or short is indicated replace coil or operator Tube in heat exchanger has overheated and ruptured A tube failure is almost always caused by a Scale formation in the tube or b inadequate water flow through the boiler Replace heat exchanger tube s and check for proper flow Page 14 LAARS HEATING SYSTEMS SECTION 6 Conversion of Model AP Pool Boilers From Indoor to Outdoor Models Please read the following instructions with Figure 11 Figure 12 shows the conversion completed Please follow the instructions in their numerical order failure to do this will cause problems on assembly 6A SECTION I See Figure 11 1 Remove top panel 1 2 Remove front and rear upper panels 2 3 Remove front and rear wings LH amp RH 3 4 Remove diverter assembly 4 5 Remove outer screw from upper end panel at junction with lower end panel Remove disconnect all probes and wires going to castings and gas train 7 Remove control box assembly front of boiler not shown 6B SECTION ll See Figure 12 1 Install front LH amp RH extension panels flush with top of upper end panel 18 2 Install rear LH amp RH extension panels flush with top of upper end panel 15 pick
17. allations where exhaust fans or blowers of any type are used Such installations must be designed by qualified engineers Figure 2 Non Combustible Base 2B Installation of Indoor Boilers 2B 1 Combustion Air Supply 1 The boiler location must provide sufficient air supply for proper combustion and ventilation of the surrounding area as outlined in the latest edition of ANSI standard Z223 1 or in Canada CAN1 B149 and any local codes that may be applicable Inadequate combustion air supply may result in incomplete combustion and consequent sooting of the heat exchange and unsafe operation of the boiler 2 In general in the U S these requirements specify that equipment rooms which represent confined spaces should be provided with two permanent air supply openings communicating directly through the wall to outside air one within 12 inches of the ceiling the other within 12 inches of the floor Each opening should have a minimum free area of one square inch per 4 000 BTUH input of the total input rating of all appliances in the enclosed area These requirements differ in Canada Consult the National Standard of Canada CAN1 B149 for details See Table 2 for recommended air supply for U S models An improperly ventilated equipment room can get excessively hot and Indoor Each Opening Size Square Inches 2000 500 2450 613 3050 763 3500 875 4050 1013 4500 1125 5000 1250 Net Free Area in Square Inches
18. ave appropriate stickers or tags attached 2 Use the figures in Table 3 to provide adequate gas piping check local code for BTU capacity required Distance from Gas Meter or Natural and LP Gas Gas Suppl inet T To il Equipment Co Line Tee lt f l Fitting Te gt C Fitting 3 Min ey Cap 7 T 0 100 100 200 200 300 Indoor Outdoor Size Size Nat LP Nat LP Nat LP 2000 2 2 3 2 3 3 2450 2200 3 2 3 2 3 3 3050 2800 3 2 3 3 38 3 3500 3200 3 2 3 3 4 3 4050 3600 38 3 4 3v 4 3 4500 4000 38 3 4 3 5 4 5000 4500 4 3 4 3 5 4 NOTES These figures are based on 1 2 water column pressure drop Check supply pressure and local code requirements before proceeding with work Pipe fittings must be considered when determining gas pipe sizing 3 A trap drip leg must be provided ahead of the gas controls see Figure 5 Where required by code provide a second manual gas shutoff valve Do not remove manual valve furnished with the unit 4 The boiler and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1 2 psig The boiler Figure 5 Tee Fitting Sediment Trap must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve during any pressure testing
19. basic controls are Water temperature controls Pilot safety system Automatic electric gas valve s ao S b Water pressure switch e Flow sensing safety device when used 7 Low water cutoffs should be inspected every six 6 months including flushing or float types NOTE Warranty does not cover any damage caused by lack of required maintenance or improper operating practices Mighty Therm Commercial Pool Heating Boiler Page 13 SECTION 5 Troubleshooting and Analysis of Service Problems 1 For proper service and problem diagnosis of the boiler and system the following tools are required a Gas pressure test kit with range from zero to 14 W C Either a slack tub manometer or an accurate gas pressure gauge is acceptable with proper adaptors which will connect to the available fittings in the line and on the gas valve b Hlectric meter s with the following ranges 0 to 500 volts A C 0 to 1000 ohms continuity c Millivolt meter with the following ranges 0 to 50 millivolts 0 to 500 millivolts 0 to 1000 millivolts d Tubecleaning kit consisting of reamer stainless steel brush speed handle and handle extensions e Accurate thermometer and pressure gauge 2 Inaddition the boiler should be equipped with a thermometer with proper ranges Heater is Pounding Knocking or Emitting Steam from Relief Valves Possible Cause What To Do Lower or no water flow This co
20. details The signal interruption can be detected either with a test light or a voltmeter Because the ignition controls are in series the control just upstream of the gas valves should be tested first Under no circumstances should the response time exceed 5 seconds System 18 Intermittent ignition supplied only for natural gas With this system pilots are automatically lit when the thermostat calls for heat The pilots are permitted a trial period for ignition then the system is locked out if it fails to light To retry ignition power to the boiler must be momentarily interrupted After the pilot is initially lit the trial for ignition time should be checked by turning off pilot gas and at the same time monitoring the time it takes for the audible sparking at the pilot burner to stop Under no circumstances should the trial for ignition exceed 15 seconds because electronic ignition controls are in series The control just upstream of the gas valves should be tested first refer to the electrical drawing supplied with the unit Once the trial for ignition period has been checked the controls should be reset and the flame failure response time checked by following the procedure given for system 16 With the pilots lit initial activation of the main burners can be achieved by slowly opening the main manual valve The result should be a smooth lighting of the main burners Page 10 LAARS HEATING SYSTEMS 3A 3 Hi Li
21. down instructions for proper pilot flame pattern If flame has the appearance of sooting tips check for debris near orifices Call service technician Pilot P N W0034500 View On Top View Arrow A Figure 9 Pilot Location Front View Of Boiler Observation Hole Burner mgri pong Figure 10 Periodic Flame Observation 2 Inspect the venting system for obstruction leakage and corrosion at least once a year 3 Keep boiler area clear and free from combustible material gasoline and other flammable liquids and vapors Boiler surfaces are hot and could ignite combustible materials 4 Be certain all combustion air and ventilation openings are unobstructed 5 Check for fouling on the external surfaces of the heat exchanger every six months NOTE After installation and first start up check the heat exchanger for fouling after the following periods of operation 24 hours 7 days 30 days 90 days and once every six months thereafter Fouling on the external surfaces of the heat exchanger is caused by incomplete combustion and is a sign of combustion air and or venting problems As soon as any fouling is observed the cause of the fouling should be corrected see Section 5 Troubleshooting The heat exchanger can be checked with a flashlight by locating a mirror under the burners An alternate method is to remove the venting and top panel as necessary to inspect from ab
22. e Rail Assembly 20011301 20011302 20011303 20011304 20011305 20011306 20011307 12 Rear Closure Assembly 20012401 20012402 20012403 20012404 20012405 20012406 20012407 13 Heat Shield Support Bracket 20003201 20003202 20003203 20003204 20003205 20003206 20003207 2 2 2 2 2 2 2 14 Tile Heat Shield Assembly 20012101 20012102 20012103 20012104 20012105 20012106 20012107 2 2 2 2 2 2 2 15 Lower Panel Assembly 20011601 20011602 20011603 20011604 20011605 20011606 20011607 F amp R 2 2 2 2 2 2 2 16 Tile Cover 20005801 20005802 20005803 20005804 20005805 20005806 20005807 2 2 2 2 2 2 2 17 Saddle Assembly End Tile 10533601 10533601 10533601 10533601 10533601 10533601 10533601 2 2 2 2 2 2 2 18 19 Tile Assembly See Tile Drawing on Page 17 20 Center Support Assembly 20004900 20004900 20004900 20004900 20004900 20004900 20004900 21 Heat Exchanger Assembly 20001301 20001302 20001303 20001304 20001305 20001306 20001307 21a Gasket Header 0095300 0095300 0095300 0095300 0095300 0095300 0095300 21b Water Barrier 10397500 10397500 10397500 10397500 10397500 10397500 10397500 21c Double Pass Header 10416200 10416200 10416200 10416200 10416200 10416200 10416200 21d Gasket Flange 0095600 S0095600 S0095600 0095600 0095600 0095600 0095600 2 2 2 2 2 2 2 21e Flange 10417400 10417400 10417400 10417400 10417400 10417400 10417400 2 2 2 2 2 2 2 21f
23. e controller aquastat to desired temperature Pilot will light automatically intermittent ignition pilot system and ignite main burners whenever the aquastat calls for heat i Adjust the pool aquastat as follows When the pool water has reached the desired temperature as measured with an accurate thermometer decrease the aquastat setting with a small screwdriver until the boiler shuts off The pool boiler will maintain the existing pool water temperature automatically 3C To Turn Off Boiler 1 Turn off main electrical switch 2 Close all manual gas valves 3D Spring and Fall Operation When the pool is not going to be used for a long period of time turn the aquastat down to approximately 70 F This will prevent the pool and surrounding ground from becoming chilled save on fuel costs and also permit the pool water temperature to be raised back to swimming temperature in a shorter period of time The pool water temperature should not be maintained below 70 F Colder water will cause condensation to form on the heat exchanger when the boiler does fire Prolonged operation at a lower temperature will cause the boiler to foul externally See Improper Use of Boiler 3E Winter Operation To shut down the boiler for longer periods turn both the manual gas valve and pilot gas valve to OFF Where the danger of freezing does not exist the normal filter cycle should be continued all year long to circulate water through t
24. essure Regulators Pilot Gs valve a Standard on sizes 3050 5000 AGA models Sizes 2000 amp 2450 use one pilot gas valve Sizes 2000 2450 amp 3050 To Pilot To Pilot B H Manual Pilot Main Gas Valvet Gas Valve Mes Burners Manual ic as To Main Valve Main Gas Valvet Burners Safety Solenoid Valve s Figure 6 Gas Piping Diagram Arrangement of gas train components for on off firing are shown schematically in the Gas Piping Diagram see Figure 6 2F Electrical Wiring AAWARNING The boiler must be electrically grounded in in Canada follow Canadian Electrical Code CSA C22 1 Do not rely on the gas or water piping to ground the metal parts of the boiler Frequently plastic pipe or dielectric unions isolate the boiler electrically Service and the unit may be standing on wet floors and could be electrocuted by a poorly grounded boiler accordance with the most recent edition of the National Electrical Code ANSI NFPA 70 and maintenance personnel who work on or around 1 Check boiler wiring and pump for correct volt age frequency and phase If the pump circuit is other than 115V check to see that the boiler is provided with an appropriate transformer 2 Wire the boiler and pump exactly as shown in the wiring diagram supplied with the boiler 3 The pump and boiler must be electrically interlocked so the boiler cannot come on unless the pump is runnin
25. flow due to a dirty or clogged filter Bypass Min Max Temp Spring Flow Bypass Rise Indoor Outdoor Part Color Req d Valve at Rear Size Size No Code GPM Cap GPM Header 2000 S220 Black 110 300 15 2450 2200 S221 White 134 300 15 3050 2800 S221 White 167 300 15 3500 3200 S222 Brown 191 300 15 4050 3600 S222 Brown 221 300 15 4500 4000 S222 Brown 246 300 15 5000 4500 S222 Brown 273 300 15 Table 4 By Pass Valve Adjustments 2J Automatic Chlorinators A concentration of chlorine in the boiler can be very destructive Therefore the following rules regarding the installation and operation of automatic chlorinators must be followed 1 The chlorinator should be installed so that it introduces the gas or solution downstream from the boiler 2 Thechlorinator should be wired so that it cannot operate unless the filter pumps running 3 Thechlorinator should be provided with an anti syphoning device so that when the pump shuts off chlorine will not syphon back into the boiler 4 When the chlorinator is installed in the system where the chlorine flows through the boiler corrosion can occur Excessive concentrations of chlorine caused by improper adjustment or failure of the chlorination equipment can cause boiler damage which is not covered by the warranty 2K Pressure Switch The pressure switch on the boile
26. g 2G 2H All field installed electrical safety devices and all field installed devices draft switches relays timers etc can be connected to the boiler wiring at points shown in the wiring diagram designated Field Interlock Auxiliary Time Clock Wiring If a time clock is used to control the filter pump operation a separate switch must be used to shut off the boiler at least 15 minutes before the filter pump is shut off Wire the separate switch sometimes called a Fireman Switch at the points shown on the internal wiring diagram as Field Interlock Piping of System to Boiler Be sure to provide gate valves at the inlet and outlet to the boiler so it can be readily isolated for service The pressure relief valve must be installed in the tapped opening provided or on a Tee fitting when provided in the boiler outlet header with its outlet piped to a drain or floor sink Special attention must be given to relief valve settings in installations where the boiler is located on the ground floor of a tall building The static pressure of the system is elevated and could cause the relief valve to leak Where no special setting of the relief valve is ordered the factory will furnish a 75 psi setting Never reduce the relief valve opening If necessary install the relief valve in a Tee immediately past the boiler outlet The weight of all water and gas piping should be supported by suitable hangers or floo
27. g this period causing the boiler to severely cycle if it is on 3A 2 Starting Instructions 1 Check the following installation details before proceeding a Hasthe required air supply been provided b ls the boiler properly vented 2 Besure the filter is clean 3 Start the filter pump Before placing the boiler in operation the automatic safety shutoff devices must be checked Once the unit is connected to the gas piping and after all of the requirements in Section 2 have been met follow this procedure a Before beginning the tests make sure the main manual gas valve and any other firing valves are in the OFF position b Make sure the power switch on the boiler is in the ON position After placing the manual pilot valves in the open position and resetting all safety devices high limit pressure switch Low Water Cutoff etc pilots can be lit following the procedure located on the boiler rating plate c Once the pilots are lit and have been established for five minutes the flame failure response time should be checked as follows System 16 Electronically supervised standing pilot system standard on propane gas Extinguish the pilot flame by placing the manual pilot valve in the closed position and at the same time begin recording the time it takes for the output signal from the electronic ignition control to be interrupted Refer to the electrical drawing supplied with the boiler for wiring
28. he system even when the boiler is turned off or shut down completely 3E 1 Draining Boiler Before Freezing If the boiler is located where it will be exposed to freezing temperatures it should be drained before the first frost Drain the boiler by removing the drain plug on the bottom of the front header casting Leave the plug out until time to use the boiler again The boiler must be level for proper drainage If compressed air is used to blow out the lines it is still necessary to follow the same procedure Keeping the pool heated by continuously running the boiler may not be adequate protection due to the possibility of a pump or power failure 3E 2 Improper Use of the Boiler The Laars AP pool boiler is not designed for continuous use as an anti freezing device for pools Operating the boiler at water temperatures below 70 F will cause the heat exchanger fins to be partially blocked with condensation resulting in incomplete combustion Prolonged operation under these conditions will result in sooting of the heat exchanger which can seriously damage the boiler and cause a fire hazard Mighty Therm Commercial Pool Heating Boiler Page 11 3F Time Clock Operation During the initial warm up period the boiler must run continuously Therefore remove all time clock stops until the pool water reaches a temperature of at least 70 F When resetting the time clocks be sure to allow the filter pump and boiler enough time to
29. hemistry Due to natural evaporation which only removes the water and leaves the minerals the mineral content of pool water increases daily Also the regular addition of algaecidal and sanitizing chemicals substantially adds to the mineral content of the pool If the mineral content of the pool is allowed to get too high the minerals will precipitate out of the water and deposit on the walls of the pool the filter and the heat exchanger tubes For this reason it is important that the pool be completely drained regularly at least every two years to reduce the chance of expensive repairs to the pool filter system and boiler It is also important to maintain the pH level of the pool water between 7 3 and 7 7 which can add years to the life of the pool finish filter system and boiler Most algaecidal and sanitizing chemicals contain sodium hypochlorite while others contain calcium hypochlorite Sodium is not a scaling chemical but calcium definitely is So when chemicals are used which contain calcium it is even more critical that the pH level of the pool water be maintained properly and that the pool water be completely changed when the dissolved solids indicate an excessive mineral content Page 12 LAARS HEATING SYSTEMS SECTION 4 Maintenance 1 At start up and every six 6 months thereafter the pilot and main burner flame should be observed for proper performance see Figures 9 and 10 see attached lighting and shut
30. inlet and out pipes will be so small as to be difficult to sense by touching the two pipes 2l Boiler By Pass Piping All Model AP pool boilers are equipped with an automatic flow control valve Do not install a manual bypass valve unless the normal filtration rate exceeds 300 GPM If the normal filtration rate exceeds that figure 1 Install the manual bypass valve as illustrated in Figure 7 2 Install a thermometer in the threaded opening in the rear header as shown in Figure 8 3 Set the manual bypass valve as follows a Clean or backwash the filter completely b Close the manual bypass valve completely c Close the boiler s main gas valve d Start the filtration system with all valves set for normal filtration e After 3 minutes record the thermometer reading this is the pool water temperature f Openmain gas valve and turn the thermostat to its highest setting to start the boiler g Gradually open the bypass valve until the temperature difference shown in column 6 of Table 4 is achieved For example if the temperature reading in Step e was 60 degrees and the boiler is a Model 3500 the thermometer should read 75 degrees Make sure this temperature difference remains constant for at least 5 minutes h Remove the handle from the bypass valve to prevent anyone from changing the setting The automatic flow control valve will maintain proper flow through the boiler regardless of the reduced water
31. maintain the pool water at the desired temperature 3G Spa Hot Tub Safety Rules Therapeutic pools or spa pools are usually piped and controlled so that very warm or hot water often with air injection is forced at high velocity into a confined area of a swimming pool or into a small separate pool Both the energy of the water and the heat furnish certain hydrotherapeutic benefits These pools are excellent for relaxation body conditioning and for arthritic and rheumatic problems but can be hazardous The Consumer Product Safety Commission has recommended the following Safety Rules for Hot Tubs 1 Spa or hot tub water temperature should never exceed 104 F 40 C A temperature of 100 F 38 C is considered safe for a healthy adult Special caution is suggested for young children 2 Drinking of alcoholic beverages before or during spa or hot tub use can cause drowsiness which could lead to unconsciousness and subsequently result in drowning 3 Pregnant women beware Soaking in water above 102 F 39 C can cause fetal damage during the first three months of pregnancy resulting in the birth of a brain damaged or deformed child Pregnant women should stick to the 100 F 38 C maximum rule 4 Before entering the spa or hot tub users should check the water temperature with an accurate thermometer spa or hot tub thermostats may err in regulating water temperatures by as much as 4 F 2 2 C 5
32. mit Checkout After running the boiler for a long enough period to bring the water temperature within the range of the hi limit slowly back off the high limit setting until the unit shuts off The main burners should re ignite when the hi limit is turned back up to its original setting The high limit should now be reset and the boiler run until it shuts off automatically on high limit Now that all tests of the safety shutoff devices have been completed refer to Section 3B for the proper settings of temperature controls NOTE Should any of the controls fail to function properly consult the factory or your gas company representative 3B To Start Up System See Section 3A for Initial Start Up Start up boiler 1 Be certain system pump is running 2 Lighting instructions are provided on the rating plate and in the User s Manual and are as follows a Turn off main electrical switch b Turn off all manual gas valves and wait five minutes Set aquastat or thermostat to lowest setting d Turn manual pilot valve to ON For standing pilot system press on pilot relay knob light pilot and keep relay knob depressed for one minute then release Once the pilot is lit the power will be supplied to the gas valve s upon activation of the aquastat e Slowly turn manual gas valve to ON f Reset all safety switches manual reset high limit low water cutoff etc g Turn on main electric switch h Set temperatur
33. ndition is usually caused by lack of adequate water flow through heater check the following 1 Is the heater wired into the pump circuit so that the heater cannot fire unless the pump is running 2 Check to see that all valves in System are open to be sure that water can circulate through the heater and the system 3 Examine pump for clogged impeller 4 Check water filter Debris from system is blocking tubes Remove header covers Examine all tubes and waterways Use new gaskets when reassembling Clean out tubes Scale has formed in tubes This is always caused by heavy mineral content of the water or clogged filter Check the water chemistry Replace the filter and clean all the internal wet surfaces Soot in Flueways or in Tubes or Noxious Fumes Indicative of Bad Combustion Possible Cause What To Do Boiler Will Not Fire Combustion air supply to equipment room is inadequate Check air supply opening Look for debris in screen or louvre which covers combustion air opening or for material blocking the opening Possible Cause What To Do Electric Power is off Check to see that main power switch is ON Use testing device to trace power to boiler junction box Stack or vent is blocked or restrictive Look for blocked stack and excessive number of elbows in stack or excessive length of horizontal runs Operating or safety control has opened circ
34. nstallation and service must be performed by a qualified installer service agency or gas supplier HEATING SYSTEMS LAARS HEATING SYSTEMS TABLE OF CONTENTS SECTION 1 3D Spring and Fall Operation 10 General Information 3E Winter Operation I 10 1A Introd UCtlOT icit ei ete tanen 3 9E 1 Draining Boiler Before Freezing s s s 10 3E 2 Improper Use of the Boiler 10 3F Time Clock Operation 11 SECTION 3G Spa Hot Tub Safety Rules 11 Installation 3H Periodic Service sussss 11 2A Boiler Placement sese eee eee eee eee 3 3l Pool Water Chemistry 11 2B Installation of Indoor Boilers 4 2B 1 Combustion Air Supply 4 2B Vening anrcsin 5 E DON k 2C Installation of Outdoor Water Units 5 Maintenance 2D Freeze Protection TTT m ERES 6 sssssussusssssssssssssssussuussHeHsususssussscussecsusssquxscssuqususe 12 2E Gas Supply and Piping 6 2F Electrical Wing 7 SECTION 5 2G Piping of System to Boiler 7 Troubleshooting and Analysis of 2H General Water PIPING 425 tectae 7 Service Problems 21 Boiler By Pass Piping e MEN MN Mr 12 2J Automatic Chlorinators sss 8 2K Pressure Switch sss 8 SE
35. ove Also check the vent system for defects at the same time a If cleaning is required shut off all electrical and gas supply to the boiler b Toexpose the heat exchanger Remove top panel covers located at the base of the front and rear flue collector panels Remove all but the top screws on each side of the front and rear flue collector panels The panels can be swung outward and propped up to reveal the heat exchanger Remove all heat exchanger baffles c Remove all burners A Caution Black carbon or green soot on a dirty heat exchanger can under certain conditions be ignited by a random spark or open flame To prevent this unlikely occurrence dampen the soot deposits with a wet brush or fine water spray before servicing or cleaning the heat exchanger With a wire brush remove soot and loose scale from the heat exchanger Do not use water or compressed air for cleaning Clean fallen debris from the bottom of the boiler Check that burner ports are clear and pilot assembly is free of debris d Reassemble in reverse order Be sure to replace the heat exchanger baffles 6 The gas and electric controls installed on the boilers are designed for both dependable operation and long life But the safety of this equipment depends completely on their proper functioning It is strongly recommended that the basic items be checked by a competent service technician every year and replaced when necessary The
36. r stands Check piping diagrams with local applicable plumbing heating and building safety codes General Water Piping Plastic fittings grids or other elements of the filter system are subject to damage by the momentary back syphoning of hot water when the pump stops To prevent this backflow install a swinging gate check valve in the piping between the filter and the boiler No Hartford Loop is required for anti syphon protection No water flow adjustments are required except when a manual bypass valve is installed Do not install any valve or other variable restriction in the return piping between the boiler outlet and the pool The outlet pipe is carrying a large volume of water which has bypassed the boiler combined with a small volume of very hot water Page 8 LAARS HEATING SYSTEMS If any part of the piping or filter system is made of plastic materials Rear Header Metal pipe at install a check valve and heat sink least 20 inches pipe in the heater inlet and outlet in length as shown in the diagram T ect M Check l Valve Filter To pool Cac a 7 Manual bypass is used only when normal 1 From filtration rate exceeds 150 GPM on sizes U pool 500 thru 715 and 175 GPM on sizes Pump 850 thru 1670 Figure 8 Thermometer Location Figure 7 Manual By Pass Installation Therefore the temperature difference between the
37. r is factory set at 4 psi Do not tamper with the switch unless the boiler is installed more than 3 feet below the surface of the Mighty Therm Commercial Pool Heating Boiler Page 9 pool If this condition exists follow this procedure to adjust the switch 1 With the boiler on the filter pump running and the filter clean slowly increase the pressure setting until the boiler shuts off Slowly decrease the pressure setting until the boiler comes back on Decrease the pressure setting another 2 psi to complete the switch setting 2 Test the setting by closing the manual gas valve and turning off the filter pump Turn the thermostat to the high setting and slowly open the manual gas valve The boiler should not try to fire when the filter pump is off If the boiler is installed more than three feet above the pool level install an eyeball fitting on the end of the return line to the pool to create adequate back pressure that the boiler to operate the pressure flow safety switch Never reduce the factory setting of the pressure switch For special installation problems consult the factory SECTION 3 Operation 3A Initial Start Up 3A 1 Initial Filter Cycle on a New Pool On a newly constructed pool be sure to run the filter pump long enough to completely turn over the pool water before turning on the boiler This will insure that any dirt and residue from the construction will be removed The filter may clog rapidly durin
38. rovided in RH extension panel for probes and wires not shown 27 Install removable panels 20 e So Oo cd o Ore Figure 11 Removal of Indoor Parts PARTS LIST FOR CONVERSION KIT INDOOR TO OUTDOOR See Figure 12 Key No Part No Seger cist cen S AE 20017100 o TT 20016900 ru ECCE 20015101 20015102 EE 20016700 TT 2001 7200 jp 20017300 Jide teniente tee vege ceceetsaheve docexees Gusts 20017700 jc 20016500 WD TT 20016600 WA T 20016300 UT 20014301 uui e T LEN IIS 20014302 jm 20015200 17A Left Front Baffle Single Inlet Manifold 20015300 17B Right Front Baffle Single Inlet Manifold 20022300 17C Left Front Baffle Split Inlet Manifold 20022000 17D Right Front Baffle Split Inlet Manifold 20022100 TE eere TE 20014601 EU 20014602 jp CET 20016100 20 Conci 20018000 2l e MEUM 20016200 22 lui Mx 20017200 DO tuse EE ME LM 20017600 DA scii ML 20018200 DD n NUUAM M ME 20018300 PA feces 20018600 WD o Gece 20015001 C iciesdeed 20015002 DB conis itte ine Si seen deis depen dete Pee eod 20016800 Mighty Therm Commercial Pool Heating Boiler Page 15 Figure 12 Outdoor Parts Referenced on page 14 Page 16 LAARS HEATING SYSTEMS SECTION 7 Parts Description and Order Numbers Key Size Size Size Size Size Size Size No Description 2000
39. s of the pipe which may cause excessive cooling and condensation Rule of Thumb The total length of the vent including the connector and any offset should not exceed 15 feet for every inch of vent diameter Longer total lengths shown in venting tables are based on maximum capacity not condensation factors 7 When the installation of a draft fan is necessary in the venting system to which a Laars boiler is to be connected the installation should be engineered by competent personnel following good engineering practices The draft fan supplier should be consulted for correct size The installation should be in accordance with the latest edition of ANSI Z223 1 and any local codes having jurisdiction When a draft fan is installed a suitable draft switch must be used and wired into the boiler control circuit at terminal designated Field Interlock to prevent firing of the unit unless a positive draft has been established see Figure 3 This Portion Factory Wired Line Voltage G 115 24v Electric Gas Valve On Heater Aquastat On Heater Draft 24 V Motor Fan Relay Motor Figure 3 Draft Fan Wiring Diagram 2C Installation of Outdoor Units 1 Locate the boiler to provide the minimum clearances as listed in Section 2A Boiler Placement Do not locate the boiler in an enclosure or wall recess Avoid locations where wind deflection off structures might cause down draft
40. uit to electric gas valve Turn off power Use continuity tester to check continuity across terminals of each operating and safety control Switch up to the electric gas valve Replace defective control Pilot flame is out Relight pilot per instructions Severe down draft is causing spillage of flue products into room Gas pressure to burners is excessive Check for 1 proper vent cap on stack 2 adequate height of stack above roof 3 equipment exhausting air from inside of building Check gas pressure with manometer and adjust with heater firing at full rate Manual reset device has tripped Follow instructions for start up Reset pilot safety and all manual reset safety Switches Heater not fitted for the fuel being supplied See nameplate for correct fuel No gas pressure to burners Trace gas line to service shutoff cock If service cock is open trace gas line to meter If no pressure is present at meter call for public utility service If gas is present in heater inlet check pressures in following sequence 1 downstream from pressure regulator 2 downstream from electric gas valve Replace or adjust as necessary Heater installed at high altitude without proper derating Installations at altitudes in excess of 2000 ft above sea level are subject to jurisdiction of the local inspection authorities Check with the factory Water Dripping in Firebox
41. up holes provided into LB upper and lower end panels Install front bottom panel 21 Install rear bottom panel 14 Install front inner baffles 2 4 from ends 17 Install rear inner baffle 1 2 from ends 16 Install front LH amp RH upper spacers 27 Install rear LH amp RH upper spacers 7 Install front flue collector extension screw onto flange of lower flue collector only 28 10 Install rear flue collector extension screw onto flange of lower flue collector only 8 11 Install rear upper panel and remaining screws from flue collector extension 12 12 Install middle rear panel 13 13 Install front panel making sure opening for removable panel is square 19 14 Install front stiffener 184 2450 and up 15 Install remaining screws from flue collector extension 16 Install rear top half panel 5 17 Install front top half panel 6 18 Install front wire 26 mesh using angle 24 at top and strap 25 at bottom mesh to be inserted under angles of wind baffle stand offs 19 Install rear mesh same as Step 18 20 Install front LH amp RH wind baffle stand off 23 21 Install rear LH amp RH wind baffle stand off 23 22 Install front and rear wind baffles 22 23 Install middle rear baffle stand off 11 24 Install middle rear baffle 10 25 Install wires control box parts onto control panel not shown 26 Install control panel assembly using holes and bushings p
42. ures be reviewed completely before proceeding with the installation Consult the Laars factory or local factory representative with any problems or questions regarding this equipment Experience has shown that most operating problems are caused by improper installation Series AP boilers are offered in two configurations an indoor version and an outdoor version The indoor version is convertible for outdoor use with the installation of a conversion kit as described in Section 6 of this manual The two configurations are shown in Figure 1 Some accessory items are shipped in separate packages Verify receipt of all packages listed on the packing slip Inspect everything for damage immediately upon delivery and advise the carrier of any shortages or damage Any such claims should be filed with the carrier The carrier not the shipper is responsible for shortages and damage to the shipment whether visible or concealed SECTION 2 Installation 2A Boiler Placement The boiler must be placed to provide clearances on all sides for maintenance and inspection There must also be minimum distances maintained from combustible surfaces Automatic Flow Control Valve Figure 1 Boiler Configuration Series AP Page 4 LAARS HEATING SYSTEMS All boilers must be installed on a non combustible floor Under no circumstances can boilers be installed on carpeting The National Fuel Code allows a boiler to be placed
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