Laars LUHE120T Installation & Operation Manual With Troubleshooting Manual Download Page 42 | Manualshive

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BMS Wiring Diagram

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Summary of Contents for LUHE120T

Page 1: ...trical 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 If you cannot reach your gas supplier call the fir...

Page 2: ...ga Ontario CANADA L4W 5N6 This water heater must be installed in accordance with local codes In the absence of local codes it must be installed in compliance with the National Fuel Gas Code ANSI Z223...

Page 3: ...erating when the installation is complete This water heater is suitable for installation on combustible flooring DO NOT install water heater directly on carpeting DO NOT operate this water heater with...

Page 4: ...ter faucet to be open for several minutes before you use any electrical appliance which is connected to the hot water system If hydrogen is present there will be unusual sounds such as air escaping th...

Page 5: ...onn Dia Gas Conn Dia Relief Valve Open Shipping Wt LBS 120T400 399 999 119 71 73 1 1 1 1 1120 120T500 499 999 119 71 74 7 8 1 1 1 1 1135 DIMENSIONS MILLIMETERS Model No Input Rate KW Storage Capacity...

Page 6: ...use scald burns resulting in serious personal injury and or death The temperature may be adjusted from about 100 F 38 C to about 180 F 82 C The thermostat was adjusted to 100 F 38 C before the water h...

Page 7: ...elow the structural floor and cannot contact any live electrical part The discharge line is to be installed to allow for complete drainage of both the combination temperature and pressure relief valve...

Page 8: ...procedures for filling and draining the water heater Powered Anode System The powered anode system provides corrosion protection to the tank by supplying a low voltage current to the titanium anode r...

Page 9: ...ater line connections or the combination temperature and pressure relief valve will not result in damage to the area adjacent to the water heater or to lower floors of the structure When such location...

Page 10: ...panel extending beyond the full width and depth of the appliance by at least three 3 in 7 6 cm in any direction or if the appliance is to be installed in an alcove or closet the entire floor must be c...

Page 11: ...emperature and Pressure Relief Valve if not already installed DANGER Temperature setting should NOT exceed a safe temperature at fixtures See water temperature control warning in Section V Water Conne...

Page 12: ...y Confined Space Spaces having less than 50 ft3 1000 BTU hr 4 8 m3 kW 1 When drawing combustion air from inside a conventionally constructed building to a confined space such a space shall be provided...

Page 13: ...Typical Front Inlet Connect with Storage Heater Figure 6 Typical Two Water Heater Connection CAUTION If the building cold water supply has a back flow preventer check valve or water meter with check v...

Page 14: ...l Three Water Heater Connection Figure 8 Typical Four Water Heater Connection Note This drawing shows a suggested piping configuration and other devices check with local codes and ordinances for addit...

Page 15: ...ne having a back flow preventer in the cold water supply provisions must be made to control thermal expansion Do NOT operate this water heater in a closed system without provisions for controlling the...

Page 16: ...es a means such as an ASSE approved mixing valve should be installed to temper the water for those uses in order to reduce scald hazard potential Failure to properly pipe this water heater may result...

Page 17: ...r isolation pipe hangers are used This prevents any vibrations from being transmitted into the living spaces DO NOT exceed the venting distances or the number of elbows listed in this manual Exceeding...

Page 18: ...Sch 40 ASTM D 2665 PVC Sch 40 ASTM D1785 CPVC Sch 40 ASTM F441 ASTM D2846 PVC and CPVC UL 1738 ULC S636 ABS Sch 40 DWV ASTM D2661 Polypropylene UL 1738 ULC S636 Stainless Steel UL 1738 ULC S636 For in...

Page 19: ...being discharged into the room Refer to the Venting section of this Installation and Operation Manual for complete instructions on venting and condensate drainage High levels of dust and debris such...

Page 20: ...inals When venting with 3 in 7 6 cm venting is desired please discard 4 in 10 2 cm vent terminals and use field supplied 3 in 7 6 cm fittings instead It is recommended to use a galvanized screen with...

Page 21: ...m for appliances 100 000 Btuh 30 kW 4 feet 1 2 m below or to side of opening 12 inches 30 cm above opening D Vertical clearance to ventilated soffit located above the terminal within a horizontal dist...

Page 22: ...cm for appliances 10 000 Btuh 3 kW 9 in 23 cm for appliances 10 000 Btuh 3 kW and 50 000 Btuh 15 kW 12 in 30 cm for appliances 50 000 Btuh 15 kW D Vertical clearance to ventilated soffit located abov...

Page 23: ...e to properly support the vent piping with hangers and clamps may result in damage to the water heater or venting system Stress levels in the pipe and fittings can be significantly increased by improp...

Page 24: ...a wall penetration the pipe may be directly stressed or high thermal stresses may be formed when the pipe heats up and expands Install accordingly to minimize such stresses Follow the following proced...

Page 25: ...than or equal to 12 in 30 5 cm and above expected snow level from the ground then the installation must be modified as shown below see Figure 14 Refer to Table 3 page 27 for maximum venting lengths u...

Page 26: ...ing operation of the water heater 3 inch Venting Installation Note Use a 4 10 1 cm to 3 7 6 cm reducer and exit the building wall with 3 7 6 cm vent pipe using a 3 7 6 cm 90 vent terminal Two 45 elbow...

Page 27: ...ke and the exhaust 2 Add 5 ft 1 52 m of venting for every 90 elbow 3 Add 2 ft 76 m of venting for every 45 elbow 4 Total vent length CANNOT exceed maximum vent length in Table 3 5 Air intake CANNOT ex...

Page 28: ...e pipe may be directly stressed or high thermal stresses may be formed when the pipe heats up and expands Install accordingly to minimize such stresses Follow the procedure below to vent through the w...

Page 29: ...ses CAUTION Failure to properly support the vent piping with hangers and clamps may result in damage to the water heater or venting system Follow the procedure below to vent through the roof 1 Cut the...

Page 30: ...rmine the total length of straight vent pipe in feet required 2 Add 5 ft 1 5 m of venting for every 90 elbow 3 Add 2 ft 76 m of venting for every 45 elbow 4 Total vent length cannot exceed maximum ven...

Page 31: ...ces and or water heaters can result in property damage personal injury or death DO NOT operate this water heater until the installation and assembly of this concentric terminal is complete and the pip...

Page 32: ...g 3 in 7 6 cm concentric terminals for a maximum 3 in 7 6 cm combined vent length of 100 ft 30 5 m There is NO reduction in vent length when using 4 in 10 2 cm concentric terminals for a maximum 4 in...

Page 33: ...e the roof surface or anticipated snowfall see Figure 23 If assembly is too short to meet height requirements the two pipes supplied in the kit may be replaced by using the same diameter pipe DO NOT e...

Page 34: ...gh the structure s hole and field supplied roof boot flashing Do NOT allow insulation or other materials to accumulate inside pipe assembly when installing through the hole 6 Install rain cap and smal...

Page 35: ...ultiple vent terminations ensure that a minimum clearance of 12 in 30 cm is maintained between edge of air inlet and adjacent vent outlet and that all vent pipes and air inlets terminate at the same h...

Page 36: ...36 Figure 25 Typical Side Wall Termination Figure 26 Approved Installation Orientation Figure 27 Side Wall Termination Assembly Figure 28 Minimum Clearances Multiple Side Wall Terminations...

Page 37: ...b Deburring Tools i A file knife or plastic deburring tool can be used to remove burrs Burrs must be removed from the inside and outside edges of the pipe to ensure a proper seal c Applicator Tools i...

Page 38: ...ive torque 2 This water heater and its gas connection must be leak tested before placing the water heater in operation Check for gas leaks with a soap and water solution and a brush or a commercial le...

Page 39: ...re to the water heater should be between a maximum 14 0 inch W C and a minimum supply pressure as shown on the rating plate The inlet gas pressure must NOT exceed the maximum value In some installatio...

Page 40: ...the control box Do NOT plug the line cord into a receptacle that can have the power supply interrupted by a switch that is used to control lights or another appliance If wiring in conduit is required...

Page 41: ...emand due to burner switch register 199 turned off 9 DHW storage 10 Reserved 11 Warm weather shutdown 12 Hot standby Firing rate 00008 Read 002 Actual firing rate or RPM Fan speed 00009 Read 003 RPM F...

Page 42: ...42 BMS Wiring Diagram...

Page 43: ...amage 5 Firing without water 6 Sooting NEVER OPERATE THE WATER HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND THAT A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VA...

Page 44: ...44 Lighting and Shutdown Instructions Figure 31 Lighting Instruction Label...

Page 45: ...determine the correct temperature setting consistent with the requirements for the installation The water heater temperature setting is adjusted by using the control display mounted to the water heate...

Page 46: ...imit max setpoint Make sure the water heater control display is not in a public area that can result in the temperature settings being improperly adjusted See previous warning on scalds and an ASSE ap...

Page 47: ...the display Step 2 Press DONE button for new setting to take effect immediately If the DONE button is not pressed the new temperature setting will take effect in approximately 10 seconds To Decrease...

Page 48: ...essed the new temperature setting will take effect in approximately 10 seconds To View Combustion Rate Step 1 Select Next while viewing DHW Setpoint in User Mode to access Rate screen Rate will only b...

Page 49: ...the problem corrected by a qualified service agent before putting the water heater back in operation It is recommended that all service work be performed by a qualified service agency WARNING Hydroge...

Page 50: ...T AIR INTAKE SYSTEM OR IN ANY LOCATION FROM WHICH FUMES COULD REACH THE WATER HEATER OR VENT AIR INTAKE SYSTEM General Water heater maintenance includes monthly tank flushing and cleaning and removal...

Page 51: ...Check LED inspect rods 1st year check rods to determine service interval check LED annually Relief Valve Function test Operate lever inspect for blockage or corrosion Vent Air Intake System Inspect I...

Page 52: ...move all of the hardness lime For this reason it is recommended that a regular schedule of deliming be maintained The depth of the buildup should be measured periodically Water heaters will have about...

Page 53: ...will not turn off the powered anode system as long as the line cord is plugged in and the breaker is left on The powered anode control module is located on the right vertical side of the control pane...

Page 54: ...se the system pressure to build until the relief valve actuation pressure is equaled Then the relief valve will open allowing some water to escape slightly lowering the pressure Contact your water sup...

Page 55: ...to be corrected If the issue continues to occur the digital display with flash error code 137 pressure switch is open or vent safety switch is open while the unit is waiting to restart 5 minutes the...

Page 56: ...etting lockout conditions without correcting the malfunction can result in a hazardous condition Step 1 Press and hold the lower right button under Next in the lower right display for at least 3 secon...

Page 57: ...s Next the display will show DHW MAX This is the maximum allowable temperature that the unit can get to before a lockout occurs Step 6 Press Next display will show DELTA T DHW this is the real time te...

Page 58: ...minals make solid contact Measure the resistance of each wire in the wire harness from the terminal ends Replace wire harness if defective If value remains out of range this hold will change to lockou...

Page 59: ...iod A log will be stored in service history Check gas valve wiring and gas valve operation during the ignition cycle If burner lights but quickly goes out check the flame sensor wire or the flame sens...

Page 60: ...12185 70 11884 11592 11308 11032 10763 10502 10248 10000 9760 9526 80 9299 9078 8862 8653 8449 8250 8057 7869 7685 7507 90 7333 7165 7000 6839 6683 6531 6383 6238 6098 5961 100 5827 5697 5570 5446 532...

Page 61: ...943 984 5 954 492 5 988 117 6 056 542 6 142 216 6 442 178 6 684 821 6 935 280 7 063 132 7 063 133 7 007 748 7 270 087 7 334 419 7 337 517 7 409 925 7 458 341 7 559 293 7 621 238 7 634 976 7 650 859 7...

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Page 64: ...x 800 559 1583 Headquarters 20 Industrial Way Rochester NH USA 03867 603 335 6300 Fax 603 335 3355 9 Brigden Gate Halton Hills Ontario Canada L7G 0A3 905 203 0600 Fax 905 636 0666 www Laars com Litho...

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