SM Series Heat Pump CONTENTS DPS Water Flow Proving..........38 Pump Relay ...............38 Comfort Alert Module ..........38 Key to Symbols..............3 Smart Start Assist.............39 Safety Warnings..............3 Mode of Operation Notes..........40 Standard package.............. 3 Heat Recovery Package............41 Model Nomenclature............3 Water Tank Preparation ..........41 HR Water Piping............41 General Description............
SM Series Heat Pump Key to Symbols | 3 KEY TO SYMBOLS NOTE: 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.
SM Series Heat Pump General Description | 5 GENERAL DESCRIPTION Safety devices are built into each unit to provide the maximum system protection possible when SM Series Water-to-Air Heat Pumps provide the properly installed and maintained. Each unit has best combination of performance and efficiency externally mounted LCD error code display, available.
6 | Moving and Storage SM Series Heat Pump  Electric Heat electrical connection knockout (Optional)  Blower outlet (Supply Air) MOVING AND STORAGE If the equipment is not needed for immediate installation upon its arrival at the job site, it should be left in its shipping carton and stored in a clean, dry area.
SM Series Heat Pump Configurability | 7 CONFIGURABILITY • 1/4" hex head driver • Needle nose pliers HORIZONTAL CONFIGURABILITY • 5/16”-1/4” ratchet wrench The Horizontal Configuration water source heat pump is designed to have a field configurable NOTE: Discharge air configuration change is blower orientation: end blow (default) and straight not possible on Heat Pumps equipped with through.
8 | Horizontal Configurability SM Series Heat Pump 3. Remove and retain bracket by removing (3) 6. Rotate the blower into its new screws. (Figure #8) position.(Figure#11) Figure # 8 Figure # 11 4. Loosen blower assembly by removing (4) 7.
SM Series Heat Pump Horizontal Configurability | 9 9. Remove and discard blower collar by removing 12. Reinstall bracket removed in step (#3) using (8) screws. (Figure #14) (3) screws in the same location. (Figure#17) Figure # 14 10. Reorient the blower assembly 180 degree with Figure # 17 blower “belly”...
10 | Horizontal Configurability SM Series Heat Pump Instructions - Right-Hand Unit (SM0**- 16. Remove and retain plastic Blower opening cover by removing (6) screws and reinstall it in 1HZ-*R*-**) the new location (Figure#20 and #21) 1. Remove and retain end and side panels.(Figure#22) Figure # 22 2.
SM Series Heat Pump Horizontal Configurability | 11 6. Remove and discard horizontal blower bracket by removing (3) screws. (Figure #27) NOTE: 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.
12 | Horizontal Configurability SM Series Heat Pump 9. Remove the blower assembly by sliding it 11. Reorient the blower assembly 180 degree with forward. (Figure #30) blower “belly” up. (Figure #32) Unit top is notched to allow blower to slide through.
SM Series Heat Pump Counter-Flow configurability | 13 14. Secure (2) the now horizontal blower brackets to the unit base using (4) screws. (Figure#35) Figure # 37 17. Reinstall all unit panels. Figure # 35 COUNTER-FLOW CONFIGURABILITY 15. Reconnect blower motor wiring and ground The Counter-Flow Configuration water source heat wire.
14 | Vertical Configurability SM Series Heat Pump Figure # 38 Top Discharge (Default) Figure # 39 Back Discharge Figure # 41  Logo/Front Panel  Electrical Box  Default Configuration (can be ordered as either right or left hand return) Internally mounted electric heat is only available in Top Discharge configuration.
SM Series Heat Pump Vertical Configurability | 15 Required steps Possible unit configurations How to use this table: • Select desired configuration from “possible unit configurations”. • Instructions with “X” have to be performed to reconfigure the unit. Right return, Right return, Left return, Right...
16 | Vertical Configurability SM Series Heat Pump Figure # 43 2. Remove and retain Condensing Section access Figure # 45 panels (bottom panel) by removing (3) screws. (Figure #44) 1) UP 1) UP Figure # 44 3. Remove and retain Air Handler Panel by lifting up and out as shown in Figure #46.
SM Series Heat Pump Vertical Configurability | 17 Blower Re-Configuration This instruction details re-configuration of blower from UP to SIDE discharge. Re- configuration to other side uses similar steps. 1. Remove and retain diagonal support brackets on Front and Back sides of the unit. (Figure #47) Figure # 49 4.
18 | Vertical Configurability SM Series Heat Pump 7. Remove and retain side panel blower opening cover by removing (6) phillips head screws and cutting/tearing insulation at perforations around the perimeter of cover.(Figures #53 and #54) Figure # 51 6. Remove and discard blower collar. (Figure #52) Discharge air configuration change is not possible on Heat Pumps equipped with...
SM Series Heat Pump Vertical Configurability | 19 9. Remove and retain (2) horizontal blower 11. Remove and retain vertical brackets from support brackets by removing (4) screws in blower by removing (4) screws, (2) on each each. (Figure #56) side of the blower.
20 | Vertical Configurability SM Series Heat Pump Condensate Drain Connection Re- 14. Reinstall blower motor and inlet ring assembly by reversing Step #6. (Figure #61) configuration When re-configuring the unit from Left-Hand Return to Right-Hand Return it is necessary to relocate condensate drain connection from FRONT left corner post to BACK left corner post.(Figure#63)
SM Series Heat Pump Vertical Configurability | 21 3. Locate the BACK left condensate drain and 8. Reinstall condensate drain plastic fitting and remove and retain plastic plug covering the bushing in its new location.(Figure#67) cutout. (Figure#65) Figure # 67 Figure # 65 HRP Switch Relocation 4.
22 | Vertical Configurability SM Series Heat Pump 2. Identify a rectangular knockout and remove it. 2. Remove and retain the Electric Heat Element Along with insulation.(Figure#69) cover(s) by removing (4) screws in each.(Figure#71) Figure # 69 3. Route HRP Pump Disconnect switch wires to the new switch location.
SM Series Heat Pump Vertical Configurability | 23 5. Disconnect main Electric Heat E-box 8. Remove and retain Blower collar cover(s). plug.(FIgure#74) (FIgure#77) Figure # 74 6. Remove and retain Electric Heat E-box by removing (2) screws.(Figure#75) Figure # 77 9.
24 | Vertical Configurability SM Series Heat Pump 12. Reconnect high voltage wiring from Electric CAUTION: take great care to ensure all Heat E-Box and Heating Element(s) matching wires are disconnected and none of the wire number to terminals as wires are 'snagged' on any components shown.(Figure#80) HT-4...
(Figure #90) panels. (Figure #84) Bend flanges one at a time. Panel containing LCD and Bosch Logo must be installed on the same side as Electrical Box. Figure # 84 NOTE: When re-installing panel, the “RED”...
26 | Pre Installation Unit Preparation SM Series Heat Pump PRE INSTALLATION UNIT PREPARATION 3. Remove adhesive backing and install each Corner Cap. (Figure#89 and#90) Corner Cap Installation Instructions Ensure cabinet surface is clean and free of Each corner cap is stamped with one the following debris to ensure proper Corner Cap Adhesion.
SM Series Heat Pump Mounting Vertical Units | 27 MOUNTING VERTICAL UNITS The secondary drain pan prevents possible condensate overflow or water leakage damage to Vertical units should be mounted level on a the ceiling. vibration absorbing pad slightly larger than the The secondary drain pan is usually placed on a base to minimize vibration transmission to the plywood base isolated from the ceiling joists by...
28 | Condensate Drain SM Series Heat Pump 1. Remove and discard factory provided screws from locations where hanging brackets will be WARNING:Rods must be securely anchored installed shown in Figure #93 to the ceiling Figure # 93 2. Mount 5 brackets to unit corner post using the Bolts provided in the kit as shown on Figure # 94 WARNING: Do not re-use screws removed Figure # 95...
SM Series Heat Pump Duct System | 29 PIPING A vertical air vent is sometimes required to avoid air pockets. The length of the trap depends on the Supply and return piping must be as large as the amount of positive or negative pressure on the unit connections on the heat pump (larger on long drain pan.
30 | Water Quality SM Series Heat Pump WATER QUALITY Table 1: Water Quality POTENTIAL Water Characteristic Acceptable Value PROBLEM Copper Cupro-Nickel pH (Acidity/Alkalinity) SCALING Hardness (CaCO3, < 350 ppm < 350 ppm MgCO3) Ryznar Stability Index 6.0 - 7.5 6.0 - 7.5 Langelier Saturation Index -0.5 - +0.5...
SM Series Heat Pump Electrical | 31 The unit is provided with a concentric knock-out for attaching common trade sizes of conduit, route Safety Devices and the UPM Controller power supply wiring through this opening. Always connect the ground lead to the grounding lug provided in the control box and power leads to the line side of compressor contactor as indicated on the wiring diagram (Figures#113 through #117...
32 | Electrical SM Series Heat Pump If the thermostat is provided with a malfunction NOTE: If unit is employing a fresh water light powered off of the common (C) side of the system (no anti-freeze protection), it is transformer, a jumper between “R” and “COM” extremely important to have the Freeze1 terminal of “ALR”...
SM Series Heat Pump Electrical | 33 • LOW PRESSURE BYPASS TIMER: If the compressor is running and the low pressure switch opens, the controller will keep the compressor ON for 120 seconds. After 2 minutes if the low pressure switch remains open, the controllers will shut down the compressor and enter a soft lockout.
34 | ECM INTERFACE BOARD SM Series Heat Pump • FREEZE SENSOR: • INTELLIGENT RESET: The default setting for the If a fault condition is freeze limit trip is 26°F (sensor number 1); however initiated, the 5 minute delay on break time period is this can be changed to 15°F by cutting the R30 initiated and the unit will restart after these delays resistor located on top of the DIP switch SW1.
SM Series Heat Pump ECM INTERFACE BOARD | 35  Reheat digital outputs • ADJUST Selector can be adjusted to NOM, (+), (-), or TEST. NOM, (+) and (-) can be adjusted  Thermostat outputs as needed by application. TEST is used for  24 VAC troubleshooting to override unit airflow to  Dehumidification method selector...
36 | ECM INTERFACE BOARD SM Series Heat Pump 3. To the left of the red and green status LED’s is a row of 1/4” male quick connects. These are used to pass thermostat inputs on to the rest of the control circuit. Remember to always turn off unit power at the circuit breaker before attaching or disconnecting any wiring from these connections to avoid accidental short...
38 | Options SM Series Heat Pump Pump Relay The heat exchanger is rated for use with potable water and is acceptable for use as a domestic The factory installed pump relay can be used to water heating device in most building codes. energize a supply pump or solenoid valve when The pump circulates water between the domestic there is a call for compressor operation.
SM Series Heat Pump Smart start assist | 39 SMART START ASSIST SSA Specifications SM series are available with the Smart Start Assist device as either a factory installed option or a field Rated Operational Voltage: 208/230VACrms +/- 15% 50-60 installed accessory.
SM Series Heat Pump Heat Recovery Package | 41 the normal flashing frequency using the same number of Mode of operation Notes flashes. The figure #108 shows the flashing in case of a The Smart Start Assist has 2 indication LEDs on board. recovery from an under-voltage alarm.
42 | Heat Recovery Package SM Series Heat Pump Cold Water Water Supply Supply T/P Valve Water Out Retrun from HRP Isolation Valves Drain Valve (Optional) Water In Supply to HRP Tank Drain Valve NOTE: Diagram for illustration purposes only. Concentric Fitting Ensure access to Heat Pump is not restricted.
SM Series Heat Pump Initial Start-Up | 43 INITIAL START-UP Note that a fault condition initiating a lockout will de-energize the compressor irrespective of NOTE: Make sure all valves in heat recovery which stage is engaged. water piping system are open. NEVER OPERATE HR PUMP DRY.
44 | Sequence of Operation SM Series Heat Pump 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 > 18VAC RECORD ALARM NEEDED? START COUNTER (IF APPLICABLE) CNT = CNT+1...
SM Series Heat Pump Application Considerations | 45 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.
46 | Application Considerations SM Series Heat Pump open cooling tower may also be used. It is Ball valves should be installed in the supply and imperative that all air be eliminated from the return lines for unit isolation and unit water flow closed loop side of the heat exchanger to insure balancing.
SM Series Heat Pump Application Considerations | 47 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.
48 | System Checkout SM Series Heat Pump SYSTEM CHECKOUT UNIT START-UP After completing the installation, and before 1. Set the thermostat to the highest setting. energizing the unit, the following system checks 2. Set the thermostat system switch to “COOL”, should be made: and the fan switch to the “AUTO”...
SM Series Heat Pump Maintenance | 49 MAINTENANCE 1. Filter changes or cleaning are required at regular intervals. The time period between filter changes will depend upon type of environment the equipment is used in. In a single family home, that is not under construction, changing or cleaning the filter every 60 days is sufficient.
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...
SM Series Heat Pump Troubleshooting | 51 TROUBLESHOOTING SM Series Water Source Heat Pump is equipped UPM Board LED Indications with a externally mounted LCD screen that displays unit errors. (Figure #114) Indication Color Blinks Description GREEN Solid 18-30 VAC Power is present High pressure lockout Low pressure lockout Freeze sensor lockout...
52 | Troubleshooting SM Series Heat Pump 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” CONTROL mode: Lack of or inadequate air flow.
SM Series Heat Pump Troubleshooting | 53 Compressor Ohms Model Start Winding Run Winding SM024 1.64 SM036 1.52 0.88 SM048 1.86 0.52 SM060 1.63 0.39 SM070 1.85 0.34 Tolerance +/- 7%. All resistance values must be measured with compressor at room temperature.
54 | Troubleshooting SM Series Heat Pump Comfort Alert Module -Flash Codes Status LED Status LED Description Status LED Troubleshooting Information Solution YELLOW "ALERT” Open Start Circuit 1. Run capacitor has failed (may not be bad, verify) FLASH CODE 6 Current only in run 2.
SM Series Heat Pump Troubleshooting | 55 SMART START ASSIST LED STATUS INDICATION Red Led Relay Condition Action Contact* FULLY ON + 11/12 Min. recovery time between Auto reset when minimun recovery starts and /or recovery time time elapses between stop to start 2 FLASHES 11/14 Undervoltage (Ue<190VAC)
56 | Electronic Thermostat SM Series Heat Pump ELECTRONIC THERMOSTAT Installation Packaged heat pumps are equipped with Position the thermostat subbase against the wall so that it is level and the thermostat wires detachable Thermostat connectors. These protrude through the middle of the subbase. Mark connectors are located in different locations the position of the subbase mounting holes and based on the blower motor that is installed in the...
58 | Operating Temperatures and Pressures SM Series Heat Pump Operating Temperatures and Pressures COOLING HEATING Model Entering Water Suction Discharge Water Suction Discharge Water Water Flow Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. F PSIG PSIG Rise °F Drop °F PSIG PSIG...
SM Series Heat Pump Operating Temperatures and Pressures | 59 Operating Temperatures and Pressures COOLING HEATING Model Entering Water Suction Discharge Water Suction Discharge Water Water Flow Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. F PSIG PSIG Rise °F Drop °F PSIG PSIG...
60 | Operating Temperatures and Pressures SM Series Heat Pump COOLING HEATING Model Entering Water Suction Discharge Water Suction Discharge Water Water Flow Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. F PSIG PSIG Rise °F Drop °F PSIG PSIG Drop °F Rise °F...
SM Series Heat Pump Operating Temperatures and Pressures | 61 COOLING HEATING Model Entering Water Suction Discharge Water Suction Discharge Water Water Flow Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. F PSIG PSIG Rise °F Drop °F PSIG PSIG Drop °F Rise °F...
TABLE(SM0**-***-***-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 SM024 Normal Part Load SM024 Normal Full Load SM036 Normal Part Load...
Water Side Pressure Drop Table Heat Pump water pressure drop Additional pressure drop in hose kit* Model Water PD @ 77°EWT with Water in Psi Water PD in Psi 0.04 0.04 0.09 SM024 0.09 0.13 0.17 0.09 0.09 0.17 SM036 0.22 10.5...
SM Series Heat Pump Wiring Diagrams | 65 WIRING DIAGRAMS Figure # 116 NOTE: FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit Revised 02-15 6 720 220 406 (2015/02)
66 | Wiring Diagrams SM Series Heat Pump Figure # 117 NOTE: FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. 6 720 220 406 (2015/02) Subject to change without prior notice SM Series Heat Pump...
SM Series Heat Pump Wiring Diagrams | 67 Figure # 118 FOR REFERENCE ONLY Actual unit NOTE: wiring may vary from this example. Always refer to the wiring diagram attached to the unit. Revised 02-15 6 720 220 406 (2015/02)
68 | Wiring Diagrams SM Series Heat Pump Figure # 119 FOR REFERENCE ONLY Actual unit NOTE: wiring may vary from this example. Always refer to the wiring diagram attached to the unit. 6 720 220 406 (2015/02) Subject to change without prior notice SM Series Heat Pump...
SM Series Heat Pump Wiring Diagrams | 69 Figure # 120 FOR REFERENCE ONLY Actual unit NOTE: wiring may vary from this example. Always refer to the wiring diagram attached to the unit. Revised 02-15 6 720 220 406 (2015/02)
70 | Wiring Diagrams SM Series Heat Pump Figure # 121 FOR REFERENCE ONLY Actual unit NOTE: wiring may vary from this example. Always refer to the wiring diagram attached to the unit. 6 720 220 406 (2015/02) Subject to change without prior notice SM Series Heat Pump...
SM Series Heat Pump Wiring Diagrams | 71 Figure # 122 FOR REFERENCE ONLY Actual unit NOTE: wiring may vary from this example. Always refer to the wiring diagram attached to the unit. Revised 02-15 6 720 220 406 (2015/02)
72 | WIRING HARNESS DRAWINGS SM Series Heat Pump WIRING HARNESS DRAWINGS Constant Torque Motor (SM0**-***-***-T*) Figure # 123 6 720 220 406 (2015/02) Subject to change without prior notice SM Series Heat Pump...