SM Series Heat Pump CONTENTS Mode of Operation Notes..........25 Heat Recovery Package............27 Key to Symbols..............3 Water Tank Preparation ..........27 Water Tank Refill ............27 Safety Warnings..............3 HR Water Piping............27 Standard package.............. 3 Initial Start-Up ..............28 Model Nomenclature............4 Sequence of Operation.............28 General Description............
SM Series Heat Pump Key to Symbols | 3 KEY TO SYMBOLS NOTICE: All refrigerant discharged from this Warnings unit must be recovered WITHOUT Warnings in this document are identified by EXCEPTION. Technicians must follow a warning triangle printed against a grey industry accepted guidelines and all local, background.
4 | Model Nomenclature SM Series Heat Pump MODEL NOMENCLATURE Figure # 2 8733942411 (2017/07) Subject to change without prior notice SM Series Heat Pump...
110°F in the cooling mode for continuous operations. Heat Pump operating under extreme conditions will have limitations on air/fluid flow rates and/or temperatures. Please refer to Bosch SM series Engineering Submittal Sheet for detailed information on extreme operating conditions. 50° F Minimum Entering Water Temperature (EWT) is recommended for well water applications with sufficient water flow to prevent freezing.
Please inspect the product carefully for any defects or SM060/070 HZ 8733942428 8733942429 discrepancies. Should you identify any issues, contact the Bosch .(Figure#4 and #5 Wholesaler / Distributor you purchased the unit from. LOCATION Locate the unit in an indoor area that allows easy...
SM Series Heat Pump Horizontal Configurability | 7 Remove and retain bracket by removing (3) screws. Blower configuration changes should be done prior (Figure #8) to unit being installed in the final location. Required Tools • 5/16" hex head driver •...
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8 | Horizontal Configurability SM Series Heat Pump Rotate the blower into its new position.(Figure#11) Remove and discard blower collar by removing (8) screws. (Figure #14) Figure # 14 Figure # 11 10. Reorient the blower assembly 180 degree with Remove and retain remaining bracket by removing blower “belly”...
SM Series Heat Pump Horizontal Configurability | 9 Instructions - Right-Hand Unit (SM0**- 12. Reinstall bracket removed in step (#3) using (3) screws in the same location. (Figure#17) 1HZ-*R*-**) Remove and retain end and side panels.(Figure#20) Figure # 20 Disconnect blower motor wiring and ground wire Figure # 17 fastened to blower housing.(Figure#21) 13.
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10 | Horizontal Configurability SM Series Heat Pump Remove and discard horizontal blower bracket by removing (3) screws. (Figure #25) NOTICE: Air coil is in close proximity to the blower. Air coil fins are easily damaged. Great care must be taken during this step to avoid coil damage.
SM Series Heat Pump Counterflow Configurability | 11 13. Reinstall (2) vertical blower brackets in the new horizontal position using (4) screws. (Figure #32) Figure # 28 Figure # 32 10. Remove and discard blower collar by removing (8) 14. Secure (2) the new horizontal blower brackets to screws.
12 | Return and Discharge Duct Flanges SM Series Heat Pump RETURN AND DISCHARGE DUCT FLANGES Return and discharge opening duct flanges are shipped unfolded. Flange bend lines are perforated allowing easy bending using standard sheet metal pliers or channel locks.
SM Series Heat Pump Mounting Vertical Units | 13 MOUNTING VERTICAL UNITS MOUNTING HORIZONTAL UNITS While horizontal units may be installed on any level Vertical units should be mounted level on a vibration surface strong enough to hold their weight, they are absorbing pad slightly larger than the base to minimize typically suspended above a ceiling by threaded rods.
14 | Hanging Bracket Kit SM Series Heat Pump HANGING BRACKET KIT Installation Instructions All horizontal units come with hanging bracket installation kit to facilitate suspended unit mounting using threaded rod.Hanging brackets are to be installed as shown in Figure #41. Figure # 43 WARNING: Follow all applicable codes and requirements when hanging this unit,...
SM Series Heat Pump Condensate Drain | 15 CONDENSATE DRAIN The duct system and all diffusers should be sized to handle the designed air flow quietly. To maximize sound A drain line must be connected to the heat pump and attenuation of the unit blower, the supply and return air pitched away from the unit a minimum of 1/8”...
16 | Water Quality SM Series Heat Pump NOTICE: Water side pressure rating is 450 psi for FPT fittings and 125 psi for field or factory installed swivel fittings. NOTICE: Do not overtighten the connections. Flexible hoses should be used between the unit and the rigid system to avoid possible vibration.
SM Series Heat Pump Electrical | 17 ELECTRICAL Properly sized fuses or HACR circuit breakers must be installed for branch circuit protection. See unit Refer to electrical component box layout. (Figure #46) nameplate for maximum fuse or breaker size. The unit is provided with a concentric knock-out for WARNING: Field wiring must comply with attaching common trade sizes of conduit, route power local and national electric codes.
18 | Electrical SM 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.
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SM Series Heat Pump Electrical | 19 UPM Board Factory Default Settings NOTICE: If unit is employing a fresh water system (no anti-freeze protection), it is TEMP 26°F extremely important to have the Freeze1 LOCKOUT R30 resistor set to 26°F in order to shut down the unit at the appropriate leaving RESET water temperature and protect your heat...
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20 | Electrical SM Series Heat Pump • MALFUNCTION OUTPUT: Alarm output is Normally will enter into a hard lockout condition. Sensor Open (NO) dry contact. If pulse is selected the alarm number 2 will constantly monitor the refrigerant output will be pulsed. The fault output will depend temperature with the sensor mounted close to the on the dip switch setting for "ALARM".
SM Series Heat Pump ECM Interface Board | 21 ECM INTERFACE BOARD Refer to Figure #46, item [9] for ECM interface board Thermostat Outputs location. In addition to providing a connecting point for First Stage Compressor Operation thermostat wiring, the interface board also translates thermostat inputs into control commands for the Second Stage Compressor Operation Electronic Commutated Motor (ECM) fan motor and...
22 | Electronic Thermostat SM Series Heat Pump ELECTRONIC THERMOSTAT CAUTION: Do not set the ADJ DIP switch to Installation the (-) setting when electric heaters are installed. Doing so may cause the heaters to Thermostat wire must be 8-conductor, 18-AWG wire. cycle on their thermal overload switches, Strip the wires back 1/4-inch (longer strip lengths may cause shorts) and insert the thermostat wires into the...
SM Series Heat Pump Options | 23 OPTIONS Number of factory installed options are available on SM Internal mounted Electric Heat is only available on Series of Heat Pumps. The following details the purpose, top blow vertical cabinets, end blow horizontal function and components of each option.
24 | Options SM Series Heat Pump Comfort Alert Module Smart Start Assist The Comfort Alert diagnostics module (CADM) is a SM series are available with the Smart Start Assist breakthrough innovation for troubleshooting heat pump device as either a factory installed option or a field system failures.
SM Series Heat Pump Options | 25 Mode of Operation Figure # 57 Figure # 58 Revised 07-17 8733942411 (2017/06)
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26 | Options SM Series Heat Pump Mode of operation Notes During the recovery time between starts, the Smart Start Assist will be continuously ON until the The Smart Start Assist has 2 indication LEDs on necessary recovery time elapses. board.
SM Series Heat Pump Heat Recovery Package | 27 HEAT RECOVERY PACKAGE Close all valves and remove the drain hose. Install HR water piping. Water Tank Preparation Concentric water fitting (p/n 8-733-907-779) is Turn off electrical or fuel supply to the water heater. recommended.
28 | Initial Start-Up SM Series Heat Pump INITIAL START-UP Heating Mode The first two stages of heating (Y1 & Y2) operate in the NOTICE: Make sure all valves in heat same manner as cooling, but with the reversing valve de- recovery water piping system are open.
SM Series Heat Pump Sequence of Operation | 29 Sequence Of Operation Flow Chart START RESET ON R RESET ON Y1 = ON R = 24VAC POWER/ SWITCHES/SENSOR CLEAR FAULTS STATUS CHECK BLINK CODE ON STATUS LED SOFT LOCKOUT COUNTER V >...
30 | Application Considerations SM Series Heat Pump APPLICATION CONSIDERATIONS maintained in the heat exchanger. This can be accomplished with either control valve or a bladder type Well Water Systems expansion tank. When using a single water well to supply both domestic water and the heat pump care must be Copper is adequate for ground water that is not high in taken to ensure that the well can provide sufficient flow...
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SM Series Heat Pump Application Considerations | 31 Ball valves should be installed in the supply and return lines for unit isolation and unit water flow balancing. NOTICE: Water piping exposed to extreme Pressure/temperature ports are recommended in both low ambient temperatures is subject to supply and return lines for system flow balancing.
Anti-freeze solutions are utilized when low evaporating conditions are expected to occur. Refer to the Bosch flow center installation manuals for more specific instructions. (Figure #63) Diagram shows typical installation and is for illustration purposes only.
SM Series Heat Pump Troubleshooting | 33 TROUBLESHOOTING SM Series Water Source Heat Pump is equipped with a externally mounted LCD screen that displays unit errors. (Figure #64) Figure # 64 Troubleshooting Information Solution column may reflect a possible fault that may be one of, or a combination of causes and solutions.
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34 | Troubleshooting SM Series Heat Pump UNIT TROUBLESHOOTING Problem Mode Check Possible Cause Action Cooling Heating UPM board is in test Is Fault LED blinking 3 Change the dip switch setting to Normal. This is mode times? part of test mode to ensure that freeze 1 and freeze 2 sensors are correctly located In test mode unit operates but UPM board...
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SM Series Heat Pump Troubleshooting | 35 UNIT TROUBLESHOOTING Problem Mode Check Possible Cause Action Cooling Heating Condensate fault - poor Check condensate pan for high water level. drainage Check drain line for blockages, double trapping or inadequate trapping. Check condensate pan for high water level. Is fault LED Blinking 4 Check air filter and return air times?
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36 | Troubleshooting SM Series Heat Pump UNIT TROUBLESHOOTING Problem Mode Check Possible Cause Action Cooling Heating Check for supply voltage at the load side of the Open compressor contactor. For 3 phase models check phase overload rotation and voltage at all 3 phases. Poor wiring connections Look for signs of heat on the wiring insulation.
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SM Series Heat Pump Troubleshooting | 37 UNIT TROUBLESHOOTING Problem Mode Check Possible Cause Action Cooling Heating Check that the reversing valve solenoid is receiving 24 VAC. If so, Reversing valve solenoid Faulty solenoid energized Check the resistance of the solenoid - an open circuit may indicate a burned out solenoid.
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38 | Troubleshooting SM Series Heat Pump UNIT TROUBLESHOOTING Problem Mode Check Possible Cause Action Cooling Heating Poor duct work/grille Ensure duct work and grilles are properly sized design for unit air flow. Air noise Fan speed setting too Consult blower performance table and reduce fan high speed if possible.
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SM Series Heat Pump Troubleshooting | 39 Comfort Alert Module -Flash Codes Status LED Status LED Description Status LED Troubleshooting Information Solution YELLOW "ALERT" Short Cycling Thermostat demand signal is intermittent FLASH CODE 3 Compressor is running Time delay relay or control board defective only briefly If high pressure switch present go to Flash Code 2 information If low pressure switch present go to Flash Code 1 information...
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40 | Troubleshooting SM Series Heat Pump SMART START ASSIST LED STATUS INDICATION Red Led Relay Condition Action Contact* FULLY ON + 11/12 Min. recovery time between Auto reset when minimum recovery starts and /or recovery time time elapses between stop to start 2 FLASHES 11/14 Under voltage (Ue<190VAC)
SM Series Heat Pump Troubleshooting | 41 OPERATING TEMPERATURES AND PRESSURES COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Entering Water Discharge Suction Subcooling Superheat Water Water flow Pressure Pressure °F °F Temp Temp Water flow Pressure Pressure °F °F Temp Temp...
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42 | Troubleshooting SM Series Heat Pump COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Air Temp Entering Water Discharge Suction Subcooling Superheat Water Air Temp Water flow Pressure Pressure °F °F Temp Drop °F Water flow Pressure Pressure °F °F Temp...
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SM Series Heat Pump Troubleshooting | 43 COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Air Temp Entering Water Discharge Suction Subcooling Superheat Water °F Water flow Pressure Pressure °F Temp Drop °F Water flow Pressure Pressure °F °F Temp Temp °F...
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44 | Troubleshooting SM Series Heat Pump COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Air Temp Entering Water Discharge Suction Subcooling Superheat Water Water flow Pressure Pressure °F °F Temp Drop °F Water flow Pressure Pressure °F °F Temp Temp °F...
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SM Series Heat Pump Troubleshooting | 45 COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Air Temp Entering Water Discharge Suction Subcooling Superheat Water Water flow Pressure Pressure °F °F Temp Drop °F Water flow Pressure Pressure °F °F Temp Temp °F...
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46 | Troubleshooting SM Series Heat Pump COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Air Temp Entering Water Discharge Suction Subcooling Superheat Water Air Temp Water flow Pressure Pressure °F °F Temp Drop °F Water flow Pressure Pressure °F °F Temp...
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SM Series Heat Pump Troubleshooting | 47 COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Air Temp Entering Water Discharge Suction Subcooling Superheat Water Water flow Pressure Pressure °F °F Temp Rise Drop °F Water flow Pressure Pressure °F °F Temp Temp...
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48 | Troubleshooting SM Series Heat Pump COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Air Temp Entering Water Discharge Suction Subcooling Superheat °F Water Water flow Pressure Pressure °F °F Temp Drop °F Water flow Pressure Pressure °F Temp Temp °F...
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SM Series Heat Pump Troubleshooting | 49 COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Entering Water Discharge Suction Subcooling Superheat Water Water flow Pressure Pressure °F °F Temp Temp Water flow Pressure Pressure °F °F Temp Temp °F (PSIG) (PSIG) Rise °F...
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50 | Troubleshooting SM Series Heat Pump COOLING HEATING Entering Water Discharge Suction Subcooling Superheat Water Air Temp Entering Water Discharge Suction Subcooling Superheat Water Water flow Pressure Pressure °F °F Temp Drop °F Water flow Pressure Pressure °F °F Temp Temp °F...
SM Series Heat Pump Troubleshooting | 51 BLOWER PERFORMANCE DATA (HZ) UNITS REV A Models Rated Adjust External Static Pressure (in of Water) Speed Airflow Only 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 024- Part High Load Normal A 024- Full High...
52 | Troubleshooting SM Series Heat Pump Blower Performance Data (VT/CF) units Rev B Rated DeHum External Static Pressure (in of Water) Model Board Airflow Airflow setting 024- Fan Norm A Only 024- Part Load Norm A 024- Full Load Norm A 036- Fan Norm A...
SM Series Heat Pump Water Side Pressure Drop Table | 53 WATER SIDE PRESSURE DROP TABLE HZ Units only (Rev A) Water Side Pressure Drop Table Additional pressure drop in hose Heat Pump water pressure drop kit* Model Water PD @ 77°EWT with Water in Water PD in Psi 0.04 0.04...
54 | Water Side Pressure Drop Table SM Series Heat Pump VT/CF Units (Rev B) Water Side Pressure Drop Table Additional pressure drop in hose Heat Pump water pressure drop kit* Model Water PD @ 77°EWT with Water in Water PD in Psi 0.03 0.05 0.08...
SM Series Heat Pump Wiring Diagrams | 55 WIRING DIAGRAMS Figure # 65 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. Revised 07-17 8733942411 (2017/06)
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56 | Wiring Diagrams SM Series Heat Pump Figure # 66 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. 8733942411 (2017/07) Subject to change without prior notice SM Series Heat Pump...
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SM Series Heat Pump Wiring Diagrams | 57 Figure # 67 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. Revised 07-17 8733942411 (2017/06)
58 | Dimensional Drawings SM Series Heat Pump DIMENSIONAL DRAWINGS Horizontal - Straight Through Figure # 68 8733942411 (2017/07) Subject to change without prior notice SM Series Heat Pump...
60 | Dimensional Drawings SM Series Heat Pump COUNTER FLOW Figure # 70 8733942411 (2017/07) Subject to change without prior notice SM Series Heat Pump...
62 | Basic Piping Diagram SM Series Heat Pump BASIC PIPING DIAGRAM Figure # 72 8733942411 (2017/07) Subject to change without prior notice SM Series Heat Pump...
SM Series Heat Pump System Checkout | 63 SYSTEM CHECKOUT Leave the unit off for approximately (5) minutes to allow for system equalization. After completing the installation, and before energizing Turn the thermostat to the lowest setting. the unit, the following system checks should be made: Set the thermostat switch to “HEAT”.
64 | Information on Decommissioning SM Series Heat Pump INFORMATION ON DECOMMISSIONING Only trained and qualified technicians are allowed to decommission and dispose of equipment following applicable requirements and local codes WARNING: Decommissioning of this equipment can be hazardous due to system pressure and electrical components.
SM Series Heat Pump Unit Check-Out Sheet | 65 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) __________________________ Compressor: RLA ____________________ LRA ___________________________ Blower Motor: FLA (or NPA) ___________...
66 | Terminology SM Series Heat Pump TERMINOLOGY functioning relies upon, fluorinated greenhouse gases, PSC - Permanent-split capacitor motor involving a part containing or designed to contain such gases. EER - Energy Efficiency Ratio Conditioned space Space within a building provided COP - Coefficient of Performance.
SM Series Heat Pump Spare Parts List | 73 Refrigeration Components Rev A HZ Part Group SM024-1HZ*-*A SM036-1HZ*-*A SM048-1HZ*-*A SM060-1HZ*-*A SM070-1HZ*-*A Compressor T111105489 T111105413 T111105414 T111105415 T111105490 Air to Ref HTX 8733929998 8733929642 8733929642 8733929999 8733929999 Water to Ref HTX (Cu) 8733929626 8733929625 8733929623...