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LAARS Heating Systems

M

ASCOT  

LX

Figure 1. 

Opening the Mascot LX. 

 

The top and bottom panels come off when 

pulled forward. This is true for all sizes.   

START-UP 

INSTRUCTIONS

 

SECTION 1.

General Information

 

WARNING

Mascot LX units 

must

 be installed in accordance with the procedures detailed in this manual, or the LAARS Heating 

Systems warranty will be voided. The installation must conform to the requirements of the local jurisdiction having 

authority, and, in the United States, to the latest edition of the National Fuel Gas Code, ANSI Z223.1/NFPA54. In 

Canada, the installation must conform to the latest edition of CSA B149.1 Natural Gas and Propane Gas Installation 

Code, and/or local codes. Where required by the authority having jurisdiction, the installation of Mascot LX boilers 

must conform to the Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-

1. Any modifications to the boiler, its gas controls, or wiring may void the warranty. If field conditions require 

modifications, consult the factory representative before initiating such modifications.

 

WIRING

 

DIAGRAM

 

RATING PLATE

 

Содержание MASCOT LX

Страница 1: ...gas in flue gases which could cause serious injury property damage or death Improper installation and or operation will void the warranty AVERTISSEMENT Assurez vous de bien suivres les instructions d...

Страница 2: ...al 13 3 3 3 Vertical Vent Terminal 15 3 3 4 Vertical Combustion Air Terminal 15 3 3 5 Installations in the Commonwealth of Massachusetts 15 3 4 Common Vent Test 16 SECTION 4 Gas Supply and Piping 4 1...

Страница 3: ...ic Hot Water Priority MLXC only 37 9 7 Cascade Auto Configuration 38 SECTION 10 Set Up Instructions 10 1 Filling the Boiler System 39 10 2 Starting the Burner after Set Up 39 10 2 1 Burner Operation 3...

Страница 4: ...he United States to the latest edition of the National Fuel Gas Code ANSI Z223 1 NFPA54 In Canada the installation must conform to the latest edition of CSA B149 1 Natural Gas and Propane Gas Installa...

Страница 5: ...r components To remove these panels for further access into the Mascot LX there are two screws that hold each panel in place Remove the 2 screws on the upper panel and slide the upper metal panel up a...

Страница 6: ...STION INLET HEAT EXCHANGER ASME TAG AUTOMATIC AIR VENT LOW WATER CUT OFF OPTIONAL EXHAUST SERVICE HATCH GAS SUPPLY HEAT EXCHANGER WATER PRESSURE SWITCH USER INTERFACE TEMPERATURE PRESSURE GAUGE GAS VA...

Страница 7: ...ch your gas supplier call the fire department has been under water A Cet appareil n est pas dot d une veilleuse Il est quipe d un dispositif d allumage qui allume automatiquement le br leur Ne tentez...

Страница 8: ...O 23 4 7 GAS GAS HYDRONIC OUTLET HYDRONIC OUTLET ELIMINATION AIR AIR VENT INLET EXHAUST VENT HYDRONIC INLET HYDRONIC INLET H F G E A D C CONDENSATE TRAP BOTTOM SIDE FRONT B DHW OUTLET DHW INLET J L K...

Страница 9: ...3 4 33 2 5 30 1 2 78 18 46 4 5 8 12 3 4 7 5 1 4 14 2 5 2 3 4 7 12 3 4 33 1 3 4 5 35 1 2 90 18 46 8 7 8 23 3 4 7 5 1 4 14 2 5 38 1 2 90 18 46 8 7 8 23 J dimension applies for both the DHW OUTLET and D...

Страница 10: ...appliance See Figure 6 1 Remove all packing and tie down materials 2 Check contents of the carton against items shown 1 PRV 2 PRV Pipe w washer 3 Wall attach bracket 1 2 7 4 3 6 9 5 8 4 Outdoor sensor...

Страница 11: ...wall and there is potential for snow accumulation in the local area both terminals must be installed at an appropriate level above grade or the maximum expected snow line The dimensions and requiremen...

Страница 12: ...n in Inches and centimeters 3 4 8 1 cm 40 6 cm 16 A Concentric 1 43 2 cm 17 B Overall Width 2 Exhaust and 2 Air Inlet 19 6 cm 7 3 4 Bolts Anchors 4 provided by installer each is to be suitable for 160...

Страница 13: ...e of PVC CPVC vent materials the installer must use proper adhesive to join CPVC and or PVC pipe and fittings 3 1 Combustion Air Mascot LX boilers and water heaters must have provisions for combustion...

Страница 14: ...9 3 1 2 Ducted Combustion Air The combustion air can be taken through the wall or through the roof When taken from the wall it must be taken from out of doors by means of the LAARS horizontal wall ter...

Страница 15: ...A B149 1 CSAB149 2 and ULC S636 Failure to follow this manual and applicable codes may lead to property damage severe injury or death INSTALLATIONS IN CANADA require the use of venting material certif...

Страница 16: ...not allowed Trade Names Models x xx and xxxx refer to variations in nominal size See manufacturer s catalog for a particular application These manufacturers samples have been tested and authorized to...

Страница 17: ...n accordance with ANSI Z223 1 NFPA 54 and applicable local codes In Canada the installation must be in accordance with CSA B149 1 or 2 and local applicable codes Consider the following when installing...

Страница 18: ...t 91 cm J Clearance to nonmechanical air supply Direct vent only 12 30cm 80 285 36 91cm inlet to building or the combustion air inlet 399 850 Other than Direct vent 4 ft 1 2m below 36 inches 91 cm to...

Страница 19: ...stalled In addition the installing plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling...

Страница 20: ...raccord s au syst me d vacuation ne fonctionnent pas 1 Sceller toutes les ouvertures non utilis es du syst me d vacuation 2 Inspecter de fa on visuelle le syst me d vacuation pour d terminer la gross...

Страница 21: ...ominal Pipe Size Natural Gas SECTION 4 Gas Supply and Piping 4 1 Gas Supply and Piping Gas piping should be supported by suitable hangers or floor stands not the appliance Review the following instruc...

Страница 22: ...0 39 Temp Rise F Inlet Temp F Temp Rise F Inlet Temp F Temp Rise F Inlet Temp F 125 150 175 SECTION 6 Water Connections 6 1 Central Heat System Piping NOTE This appliance must be installed in a closed...

Страница 23: ...or The pump is sized for a maximum of 30 feet 9 1m of piping and the headloss of the boiler only The system designer should take into account allowable boiler temperature rise of 65 F 36 C Maximum 6 2...

Страница 24: ...acturer s responsibility Contact Laars to order Kit A2123601 __________________________________________________________________________________________ Figure 13 DHW Connections with Anti Scald Valve...

Страница 25: ...piping required by local code must be installed CAUTION Scalding Risk Laars recommends the use of a thermostatic mixing valve at domestic hot water outlet boiler location to reduce potential for scal...

Страница 26: ...15 Hydronic Piping only with an indirect tank as a zone Heating Supply Air Eliminator Sediment trap 1 piping to DHW Indirect DWH Tank 18 heat trap Expansion tank and auto feed Heating Return Closely s...

Страница 27: ...ltiple baseboard zones Zones with zone valves 24V balancing valves Air seperator DHW 1 1 4 Primary loop Multi Mascot LXs for Large house residential with long muliple baseboard zones Closely spaced te...

Страница 28: ...ge homes with long multiple radiant zones Zones with zone valves 24V balancing valves 1 1 4 Primary loop Closely spaced tee s 4 pipe diameters apart Purge drain valves Note Expansion tank may be requi...

Страница 29: ...ced tee s 4 pipe diameters apart Increase from 3 4 to 1 1 4 Manifold size based on number of zones required Manifold size based on number of zones required Mascot LX Combi Hydronic piping Heating zone...

Страница 30: ...d on number of zones required Manifold size based on number of zones required Mascot LX Combi Hydronic piping Heating zones piped with Zone valves Expansion tank air vent Purge drain valves DHW 1 1 4...

Страница 31: ...lectrical outlet with 15A circuit protection FLA is 2A There is an internal 10A breaker to protect internal system components 7 2 Pump Connections Mascot LXC energizes boiler pump opens 3 way valve an...

Страница 32: ...F1 5A 5A F2 X3 12 BOILER PUMP R R SYSTEM PUMP X3 7 X3 6 RELAY DHW PUMP RELAY PWB 4 PWB 6 PWB 8 X3 15 PWB 9 X3 14 PWB 7 X3 5 X3 13 PWB 5 RK WIRE X3 8 USED ON LABEL H2365 CD 5 2 1 JM 5 22 14 C GRAPHIC C...

Страница 33: ...ze Low Voltage Field Connections located on the front of the inside lower panel OUTDOOR SENSOR SYSTEM SENSOR TANK AQUASTAT DHW SENSOR DC OUT DC IN GROUND GND MOD BUS SAFETY INTERLOCK T T 1 2 3 4 5 6 7...

Страница 34: ...ANK NEUT NEUT NEUT LINE LINE LINE INTERLK T FIELD T GROUND 2 1 2 1 4 2 BL 1 4 8 5 SENSOR OUTDOOR L1 IN NEUTRAL GROUND SYSTEM R W V V V BK G FROM X5 BR TO FROM X3 GY BL GY O R BK Y BL W 1 GY W R R BK 1...

Страница 35: ...to domestic hot water The control is setup using the User Interface which contains 5 buttons and a digital display Figure 23 The User Interface The User Interface is located on the one panel of the M...

Страница 36: ...e set point 5 Icon 1 displays the flue temperature when Darkened 6 Icon 1 displays inlet temperature when arrow up is Darkened outlet temperature when arrow down is Darkened differential outlet inlet...

Страница 37: ...l Set is displayed Use the Arrows to adjust to the desired Outlet temperature and then press Select to Save 45 189 130 Inlet Temp Inlet Temperature is displayed as well as the darkened arrow pointing...

Страница 38: ...0O P34 On hysteresis Voltage 5 VDC shows 50 V010H P35 BMS Rate at Minimum Voltage 20 shows 200 V010A P36 BMS Rate at Maximum Voltage 100 shows 1000 V010B P37 BMS Temperature Setpoint at Minimum Voltag...

Страница 39: ...ressing and holding the Select OK button and Up Arrow simultaneously for five seconds With an active call for heat the boiler will light and run at 100 of firing rate The boilers input can be adjusted...

Страница 40: ...process consists of a prepurge trial for ignition and run period The prepurge period starts once the fan RPM reaches a preset level The trial for ignition period follows The trial for ignition period...

Страница 41: ...oor Air Shutdown Differential 9 5 Domestic Hot Water Demand 9 5 a Combi Boiler DHW For Combi units MLXC DHW demand is triggered by a flow sensor located near the DHW cold water inlet When water begins...

Страница 42: ...for Terminal B and GND To configure the control system identify which boiler is going to be the master boiler for the cascade system and navigate to installer parameter P06 Cascade Address Set the add...

Страница 43: ...n the Operating Instructions Start Up Shut Down Instruction Decal located on the back of the Top Front Cover and turn on gas and electrical power to appliance SECTION 10 Set Up Instructions 10 1 Filli...

Страница 44: ...CO2 is within the range identified see Figure 26 2 Measure the CO2 in the flue products at low fire Mascot LX can be forced to low fire to allow for easier setup Refer to Section 8 for instructions on...

Страница 45: ...Table 17 CO2 Range and Pressure Settings Figure 26 Adjustment Screws and Settings for CO2 Manifold Pressure Screw under cap High fire setting Adjustment Screws on Gas Valve Close door first before me...

Страница 46: ...c items listed below every year a Appliance control f Flow switch b Automatic gas valve g Low water cutoff c Pressure switches h Burner d Blower i Heat exchanger e Pump 11 2 1 Burner Check the burner...

Страница 47: ...lts from the burner door blower arm If the fan is determined to be defective replace the existing fan with a new one reversing the steps above Make sure to install all of the required O rings and gask...

Страница 48: ...r to sections Figure 26 and Table 17 of this manual for the proper adjusting procedures 7 Close all front covers WARNING Serious injury or death could occur if CO2 levels are not adjusted properly ___...

Страница 49: ...e start time is over the unit will be in normal operation Firing rate will modulate based on the heating load via the temperature controller settings and readings 5 When the call for heat is complete...

Страница 50: ...nsor drift too high E016 Outlet sensor drift too high E017 Flue sensor error E018 Outlet sensor error E019 Inlet sensor error BLOCKING CODES may reduce input rate heating capacity CODE DESCRIPTION b01...

Страница 51: ...Mascot LX Boilers and Water Heaters Page 47...

Страница 52: ...ON 13 Replacement Parts 13 1 Exploded Parts Views and their Laars Part Numbers 4 See Figure 31 For blower and combustion parts Figure 30 Parts 12 11 42 43 44 45 13 10 14 46 47 26 40 7 38 39 35 37 41 6...

Страница 53: ...022700 VALVE GAS LHX x x x x x x x 2p2000 21 RW2013400 GASKET FLAME SENSOR x x x x x x x 22 W2014200 IGNITOR SPARK x x x x x x x 23 W2014300 SENSOR FLAME x x x x x x x 24 RL2018401 BURNER 50 75 x x 24...

Страница 54: ...LAARS Heating Systems Page 50 4 Figure 31 Parts Blowers and Combustion 20 18 15 16 26 24 25 27 22 23 21 19...

Страница 55: ...43 500 168 PLUG HEX 1 8 NPT x x x x x x x 44 12H5501 GASKET VENT ADAPTER M2 125 x x x x x x x 45 S2114000 GROMMET x x x x x x x 46 E2334702 SWITCH PRESSURE FAN PROVING x x 46 E2334700 SWITCH PRESSURE...

Страница 56: ...Rochester NH 03867 603 335 6300 Fax 603 335 3355 1869 Sismet Road Mississauga Ontario Canada L4W 1W8 905 238 0100 Fax 905 366 0130 www Laars com Litho in U S A Laars Heating Systems 1409 Document 128...

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