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Bosch LM Series Installation, Operation And Maintenance Manual

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LM Series Heat Pump
LM024 | LM036 | LM048 | LMO60 | LM070
Installation, Operation and Maintenance Manual

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  Summary of Contents for Bosch LM Series

  • Page 1 LM Series Heat Pump LM024 | LM036 | LM048 | LMO60 | LM070 Installation, Operation and Maintenance Manual...
  • Page 2: Table Of Contents

    LM Series Heat Pump CONTENTS Troubleshooting ..............24 Standard package.............. 4 Electronic Thermostat Installation ........29 General Description............4 Operating Temperatures and Pressures ......30 Moving and Storage............5 Airflow Tables..............35 Initial Inspection ............... 5 Wiring Diagrams ..............37 Location................5 WIRING HARNESS DRAWINGS ..........50 Blower Configurability............
  • Page 3: Model Nomenclature

    LM Series Heat Pump MODEL NOMENCLATURE LM 024 - 1 VT C - F L T - T A Size Revision Level A - Current Fan/Motor Options A - Constant Airflow ECM T - Constant Torque ECM Voltage Discharge Air Configuration...
  • Page 4: Standard Package

    4 | Standard package LM Series Heat Pump STANDARD PACKAGE LM Series Water-to-Air Heat Pumps are available in Vertical (VT) and Horizontal (HZ) configurations. VT and HZ units Discharge Air Orientation is Field Configurable with the purchase of a separate kit.
  • Page 5: Moving And Storage

    LM Series Heat Pump Moving and Storage | 5 For storage If unit stacking is required, stack units as follows: Do not stack 6 ton units! Vertical units: less than 6 tons, no more than two high. Horizontals units: less than 6 tons, no more than three high.
  • Page 6: Return And Discharge Duct Flanges

    6 | Return and Discharge Duct Flanges LM Series Heat Pump RETURN AND DISCHARGE DUCT FLANGES Return and discharge opening duct flanges are shipped unfolded. Flanges bend lines are perforated allowing easy bending using standard sheet metal pliers or channel locks. (Figure #3)
  • Page 7: Condensate Drain

    LM Series Heat Pump Condensate Drain | 7 If the unit is located in a crawl space, the bottom A flexible connector is recommended for supply of the unit must be at least 4” above grade to and return air duct connections on metal duct prevent flooding of the electrical parts during systems.
  • Page 8: Piping

    8 | Piping LM Series Heat Pump PIPING ELECTRICAL Supply and return piping must be as large as the Refer to electrical component box layout. unit connections on the heat pump (larger on long (Figures #6-8) runs). Field wiring must comply with local and Never use flexible hoses of a smaller inside national electric codes.
  • Page 9 LM Series Heat Pump Electrical | 9 Figure # 6 - Single Phase Unit Figure # 8 Three Phase Unit [1] Compressor contactor [2] Emergency Relay (Option) [3] Second Stage Relay [4] Hot Gas Reheat Relay (Option) [5] Cooling Relay...
  • Page 10: Safety Devices And The Upm Controller

    10 | Electrical LM Series Heat Pump Safety Devices and the UPM Controller If the thermostat is provided with a malfunction light powered off of the hot (R) side of the transformer, then the thermostat malfunction light connection should be connected directly to the (ALR) contact on the unit’s UPM board.
  • Page 11 LM Series Heat Pump Electrical | 11 • Evaporator freeze protection sensor, mounted between the thermal expansion device and the UPM Board Factory Default Settings evaporator, monitors refrigerant temperature TEMP 30°F between the evaporator coil and thermal expansion valve. If temperature drops below or...
  • Page 12 12 | Electrical LM Series Heat Pump • MALFUNCTION OUTPUT: between the thermal expansion valve and Alarm output is If pulse is water coil. If temperature drops below or Normally Open (NO) dry contact. selected the alarm output will be pulsed. The...
  • Page 13: Ecm Interface Board- Constant Airflow Motor (Option)

    LM Series Heat Pump Electrical | 13 ECM INTERFACE BOARD- Constant Airflow Motor (Option) Thermostat Outputs Refer to Figure #9, item [12] for ECM interface First Stage Compressor Operation board location. In addition to providing a connecting point for thermostat wiring, the...
  • Page 14: Dehumidification Method Selector

    14 | Constant Torque Motors (ECM) LM Series Heat Pump To the left of the red and green status LED’s is a row of 1/4” male quick connects. These are used Do not set the ADJ DIP switch to the (-) to pass thermostat inputs on to the rest of the setting when electric heaters are installed.
  • Page 15: Options

    Number of factory installed options are available on LM Series of Heat Pumps. The following details the purpose, function and components of each Heat pumps with hot Gas Reheat need to be option.
  • Page 16: Dps Water Flow Proving

    (Y2) the second stage (or full compressor The DPS water flow proving switch is a factory capacity) is initiated. The fan ramps up to full installed option available for the LM series. The cooling air flow. DPS prevents compressor operation if there is...
  • Page 17 LM Series Heat Pump Sequence of Operation | 17 UPM Sequence of Operation (SOO) Flow Chart Y1=1 Power/Switchs/Sensor Status Check 18VAC > Lockout Can Be Set To 4 Via Dip Switch Blink Code On Status LED Soft Lockout HPC = 1...
  • Page 18: Application Considerations

    18 | Application Considerations LM Series Heat Pump APPLICATION CONSIDERATIONS No unit should be connected to the supply or return piping until the water system has been Cooling Tower/Boiler Systems completely cleaned and flushed to remove any dirt, piping chips or other foreign material. Supply and...
  • Page 19 LM Series Heat Pump Application Considerations | 19 Note: Diagram shows typical installation and is for illustration purposes only. Ensure access to Heat Pump is not restricted. Figure # 15 [1] Line voltage disconnect (unit) [2] Low voltage control connection...
  • Page 20: Geothermal Systems

    20 | Application Considerations LM Series Heat Pump Geothermal Systems installation easy. Anti-freeze solutions are utilized when low evaporating conditions are expected to Closed loop and pond applications require occur. Refer to the GLP installation manuals for specialized design knowledge. No attempt at these more specific instructions.
  • Page 21: System Checkout

    LM Series Heat Pump System Checkout | 21 SYSTEM CHECKOUT 2. Set the thermostat to the highest setting. 3. Set the thermostat system switch to “COOL”, After completing the installation, and before and the fan switch to the “AUTO” position. The energizing the unit, the following system checks reversing valve solenoid should energize.
  • Page 22: Access To Internal Components For Vertical (Vt) Units

    22 | Maintenance LM Series Heat Pump 3. Lubrication of the blower motor is not required, however may be performed on some motors to extend motor life. Use SAE-20 non- detergent electric motor oil. 4. The condensate drain should be checked annually by cleaning and flushing to insure proper drainage.
  • Page 23: Unit Check-Out Sheet

    LM Series Heat Pump Unit Check-Out Sheet | 23 UNIT CHECK-OUT SHEET Customer Data Customer Name _____________________________________________ Date ___________________________________ Address ______________________________________________________ _______________________________________________________________ Phone _______________________________________________________ Unit Number ___________________________ Unit Nameplate Data Unit Make _________________________________________ Model Number ____________________________________ Serial Number ____________________________________ Refrigerant Charge (oz) __________________________...
  • Page 24: Troubleshooting

    24 | Troubleshooting LM Series Heat Pump TROUBLESHOOTING Troubleshooting Information Solution LM Series Water Source Heat Pump is equipped column may reflect a possible fault that with two (2) externally mounted LEDs (Figure #21) may be one of, or a combination of that blink for unit errors.
  • Page 25 LM Series Heat Pump Troubleshooting | 25 Unit Troubleshooting Problem Possible Cause Checks and Correction UNIT OFF ON Discharge In “COOLING” mode: Lack of or inadequate water flow. Entering water HIGH PRESSURE pressure too high temperature is too warm. Scaled or plugged condenser. In “HEATING”...
  • Page 26 26 | Troubleshooting LM Series Heat Pump Compressor Ohms Model Voltage Start Winding Line-to-Line Run Winding 1.64 1.30 2.17 1.48 LM024 2.153 2.153 1.763 8.60 8.60 7.30 1.52 0.88 1.15 1.22 LM036 1.53 1.53 1.21 5.87 5.87 4.86 1.86 0.52 0.88...
  • Page 27 LM Series Heat Pump Troubleshooting | 27 UPM Board LED Indications Indication Color Blinks Description GREEN Solid 18-30 VAC Power is present High pressure lockout Low pressure lockout Freeze sensor lockout Condensate overflow Brownout Evaporator Freeze condition Comfort Alert Module -Flash Codes...
  • Page 28 28 | Troubleshooting LM Series Heat Pump Comfort Alert Module -Flash Codes Status LED Status LED Description Status LED Troubleshooting Information Solution YELLOW "ALERT” Open Circuit 1. Outdoor unit power disconnect is open FLASH CODE 5 2. Compressor circuit breaker or fuse(s) is open 3.
  • Page 29: Electronic Thermostat Installation

    LM Series Heat Pump Electronic Thermostat Installation | 29 ELECTRONIC THERMOSTAT INSTALLATION Packaged heat pumps are equipped with detachable Thermostat connectors. These Position the thermostat subbase against the wall so that it is level and the thermostat wires connectors are located in different locations protrude through the middle of the subbase.
  • Page 30: Operating Temperatures And Pressures

    30 | Operating Temperatures and Pressures LM Series Heat Pump OPERATING TEMPERATURES AND PRESSURES Operating Temperatures and Pressures COOLING HEATING Entering Suction Discharge Water Suction Discharge Water Model Water Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. F Flow...
  • Page 31 LM Series Heat Pump Operating Temperatures and Pressures | 31 Operating Temperatures and Pressures COOLING HEATING 73-89 266-325 15-18 30° 77-94 272-333 16-19 117-143 189-231 14-17 18-22 86-105 279-341 17-21 40° 112-137 178-217 19-24 90-110 286-350 18-22 126-154 221-270 14-17...
  • Page 32 32 | Operating Temperatures and Pressures LM Series Heat Pump Operating Temperatures and Pressures COOLING HEATING 64-78 248-303 15-18 30° 12.0 67-82 254-311 16-19 109-134 183-224 18-22 19-23 75-91 261-319 17-21 40° 12.0 105-128 172-210 10-12 20-25 79-96 267-327 18-23...
  • Page 33 LM Series Heat Pump Operating Temperatures and Pressures | 33 Operating Temperatures and Pressures COOLING HEATING 68-84 256-313 19-23 30° 14.0 73-89 261-319 20-25 113-138 172-210 18-22 19-23 81-99 277-339 22-26 40° 14.0 110-134 161-196 12-14 20-24 86-105 283-346 23-28...
  • Page 34 34 | Operating Temperatures and Pressures LM Series Heat Pump Operating Temperatures and Pressures COOLING HEATING 71-87 259-316 19-23 30° 18.0 76-92 264-322 20-25 116-141 175-213 18-22 19-23 84-102 280-342 22-26 40° 18.0 113-137 164-199 12-14 20-24 89-108 286-349 23-28...
  • Page 35: Airflow Tables

    LM Series Heat Pump Airflow Tables | 35 AIRFLOW TABLES Constant Torque Motor Airflow Table (LM0**-***-***-T*) ECM Const Torque Motor - X13 Rated Factory External Static Pressure (in of Water) Models Speed Airflow setting 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20...
  • Page 36 36 | Airflow Tables LM Series Heat Pump Constant Airflow Motor Airflow Table (LM0**-***-***-A* ECM Const CFM Motor - EON Rated External Static Pressure (in of Water) Models Speed Airflow Adjust Tap 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00...
  • Page 37 LM Series Heat Pump Airflow Tables | 37 Figure 24: Water side pressure drop in PSIG Water PD @ 77°EWT Series with Water LM024 LM036 10.5 LM048 12.5 LM060 17.5 LM070 Revised 09-13 8 733 905 315 (2013/9)
  • Page 38: Wiring Diagrams

    38 | Wiring Diagrams LM Series Heat Pump WIRING DIAGRAMS Figure # 25 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 39 LM Series Heat Pump Wiring Diagrams | 39 Figure # 26 Revised 09-13 8 733 905 315 (2013/9)
  • Page 40 40 | Wiring Diagrams LM Series Heat Pump Figure # 27 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 41 LM Series Heat Pump Wiring Diagrams | 41 Figure # 28 Revised 09-13 8 733 905 315 (2013/9)
  • Page 42 42 | Wiring Diagrams LM Series Heat Pump Figure # 29 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 43 LM Series Heat Pump Wiring Diagrams | 43 Figure # 30 Revised 09-13 8 733 905 315 (2013/9)
  • Page 44 44 | Wiring Diagrams LM Series Heat Pump 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 45 LM Series Heat Pump Wiring Diagrams | 45 Revised 09-13 8 733 905 315 (2013/9)
  • Page 46 46 | Wiring Diagrams LM Series Heat Pump 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 47 LM Series Heat Pump Wiring Diagrams | 47 Figure # 31 Revised 09-13 8 733 905 315 (2013/9)
  • Page 48 48 | Wiring Diagrams LM Series Heat Pump Figure # 32 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 49 LM Series Heat Pump Wiring Diagrams | 49 Figure # 33 Revised 09-13 8 733 905 315 (2013/9)
  • Page 50 50 | Wiring Diagrams LM Series Heat Pump Figure # 34 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 51: Wiring Harness Drawings

    LM Series Heat Pump WIRING HARNESS DRAWINGS | 51 WIRING HARNESS DRAWINGS Figure # 35 Three Phase Revised 09-13 8 733 905 315 (2013/9)
  • Page 52 52 | WIRING HARNESS DRAWINGS LM Series Heat Pump Figure # 36 Three Phase 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 53 LM Series Heat Pump WIRING HARNESS DRAWINGS | 53 Figure # 37 Single Phase Revised 09-13 8 733 905 315 (2013/9)
  • Page 54 54 | WIRING HARNESS DRAWINGS LM Series Heat Pump Figure # 38 Single Phase 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 55: Dimensional Drawings

    LM Series Heat Pump Dimensional Drawings | 55 DIMENSIONAL DRAWINGS Figure # 39 Revised 09-13 8 733 905 315 (2013/9)
  • Page 56: Horizontal - Straight Through

    56 | Dimensional Drawings LM Series Heat Pump Horizontal - Straight Through Figure # 40 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 57: Horizontal - Hanging Bracket Location

    LM Series Heat Pump Dimensional Drawings | 57 Horizontal - Hanging bracket location Figure # 41 Revised 09-13 8 733 905 315 (2013/9)
  • Page 58: Vertical

    58 | Dimensional Drawings LM Series Heat Pump Vertical Figure # 42 8 733 905 315 (2013/9) Subject to change without prior notice LM Series Heat Pump...
  • Page 59: Notes

    LM Series Heat Pump Notes | 59 NOTES Revised 09-13 8 733 905 315 (2013/9)
  • Page 60 601 N.W. 65th Court, Ft. Lauderdale, FL 33309 Phone: 866-642-3198 | Fax: 954-776-5529 www.boschtaxcredit.com | www.bosch-climate.us Revised 09-13...

This manual is also suitable for:

Lm024Lm060Lm048Lm070Lm036