Paired Air Handler Before performing service or maintenance Unit 1 Unit 2 operations on the system, turn off main LM024-1CSC LM024-1AVX LM024-1AHX power to the unit. Electrical shock could LM036-1CSC LM036-1AVX LM036-1AHX cause personal injury or death. LM048-1CSC LM048-1AVX LM048-1AHX...
4 | LM CS Standard package LM CS Series Heat Pump LM CS STANDARD PACKAGE The Water-to-Air Heat Pumps are designed to operate with entering fluid temperature between 20°F to 80°F in the heating mode and between 50°F to 110°F in the cooling mode. 50°F Minimum Entering Water Temperature (EWT) for well water applications with sufficient water flow to prevent freezing.
LM CS Series Heat Location | 5 LOCATION INSTALLATION To maximize system performance, efficiency and Loosen compressor mounting bolts. reliability, and to minimize installation costs, it is always best to keep the refrigerant lines as short as possible. Every effort should be made to locate NOTE: The installer should comply with all the air handler and the condensing section as close as possible to each other.
6 | Condensate Drain LM CS Series Heat Pump CONDENSATE DRAIN Use cupra-nickel condenser in ground water application due to possibility of containing high mineral and corrosive properties Both the supply and discharge water lines will sweat if subjected to low water temperature. These lines should be insulated to prevent damage from condensation.
LM CS Series Heat Electrical | 7 The unit is provided with a concentric knock-out [9] ECM Interface Board(Option, mounts on E-Box for attaching common trade sizes of conduit, route cover) power supply wiring through this opening. [10] Comfort Alert Module (Option) Always connect the ground lead to the grounding [11] DDC (Option) lug provided in the control box and power leads to...
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8 | Electrical LM CS Series Heat Pump • Water side freeze protection sensor, mounted If the unit is being connected to a thermostat close to condensing water coil, monitors with a malfunction light, this connection is made refrigerant temperature between condensing at the unit malfunction output or relay.
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LM CS Series Heat Electrical | 9 • MALFUNCTION OUTPUT: Alarm output is If pulse is Normally Open (NO) dry contact. UPM Board Factory Default Settings selected the alarm output will be pulsed. The TEMP 30°F fault output will depend on the dip switch setting for "ALARM".
10 | Comfort Alert Module LM CS Series Heat Pump COMFORT ALERT MODULE set to 4) within an hour the UPM controller will enter into a hard lockout condition. It will The Comfort Alert diagnostics module (CADM) is a constantly monitor the refrigerant temperature breakthrough innovation for troubleshooting heat with the sensor mounted close to the pump system failures.
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25 FT. 35 FT. 45 FT. 50 FT. 75 FT Charge (Oz)* LIQ. SUC. LIQ. SUC. LIQ. SUC. LIQ. SUC. LIQ. SUC. LM024 LM036 LM048 LM060 1-1/8 1-1/8 1-1/8 1-1/8 1-1/8 LM070 1-1/8 1-1/8 1-1/8 1-1/8 1-1/8 CAPACITY MULTIPLIER 1.00 .995...
12 | Options LM CS Series Heat Pump OPTIONS Number of factory installed options are available on LM CS Series of Heat Pumps. The following details the purpose, function and components of each option. Pump Status Switch The pump status switch is a Current Transformer (CT) that monitors the current flow from the condenser pump motor.
LM CS Series Heat Sequence of Operation | 13 SEQUENCE OF OPERATION Once the thermostat is satisfied, the compressor shuts down and the fan ramps down either fan only Cooling Mode mode or off over a span of 30 seconds. If Energizing the “O”...
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14 | Sequence of Operation LM CS Series Heat Pump 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 COUNT = 2 Record Alarm Start Counter (If Applicable)
LM CS Series Heat Application Considerations | 15 APPLICATION CONSIDERATIONS pressure must always be maintained in the heat exchanger. This can be accomplished with either Well Water Systems control valve or a bladder type expansion tank. Copper is adequate for ground water that is not When using a single water well to supply both high in mineral content.
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16 | Application Considerations LM CS Series Heat Pump It is imperative that all air be eliminated from the Pressure/temperature ports are recommended in closed loop side of the heat exchanger to insure both supply and return lines for system flow against fouling.
LM CS Series Heat Application Considerations | 17 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.
18 | System Checkout LM CS Series Heat Pump SYSTEM CHECKOUT UNIT START-UP After completing the installation, and before 1. Put the UPM board in “test” mode. energizing the unit, the following system checks 2. Set the thermostat to the highest setting. should be made: 3.
60 days is sufficient. In other applications such as motels, where daily LM024 vacuuming produces a large amount of lint, filter changes may need to be as frequent as biweekly.
Auxiliary Heat Unit Make __________________________________ Model Number: ______________________________ Serial Number _____________________________ Max Fuse Size (Amps) _______________________ Volts / Amps _______________________________ Bosch Group Entering Air Temperature _____________________ 601 NW 65th Court Leaving Air Temperature ______________________ Fort Lauderdale, FL 33309 MAIL TO: Phone: (954) 776-5471 Bosch.Fhp.TechSupport@us.bosch.com...
LM CS Series Heat Troubleshooting | 21 TROUBLESHOOTING Troubleshooting Information Solution column may reflect a possible fault that may be one of, or a combination of causes and solutions. Check each cause and adopt "process of elimination" and or verification of each before making any conclusion.
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Compressor Ohms UPM Board LED Indications Model Start Winding Run Winding Indication Color Blinks Description LM024 1.64 GREEN Solid 18-30 VAC Power is present LM036 1.52 0.88 High pressure lockout LM048 1.86 0.52...
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LM CS Series Heat Troubleshooting | 23 HRP Troubleshooting Problem Possible Cause Checks and Corrections NO FLOW No Power Check power supply LOW FLOW On/Off Switch Position Set switch to “ON” position Compressor Contactor Engage heat pump contactor Broken or loose wires Repair or tighten wires Air Lock Purge air from piping system...
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24 | Troubleshooting LM CS Series Heat Pump Comfort Alert Module -Flash Codes Status LED Status LED Description Status LED Troubleshooting Information Solution YELLOW "ALERT” Open Start Circuit Run capacitor has failed (may not be bad, verify) FLASH CODE 6 Current only in run Open circuit in compressor start wiring or connections circuit...