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SM Split CS Series Heat Pump

SM Split CS Series Heat Pump

8733825873 (2020/05)

Subject to change without prior notice

Document Conventions .......................................................3

Key to Symbols............................................................ 3

Safety Warnings..................................................................3

Model Nomenclature ...........................................................4

CS/Air Handler Pairing ........................................................5

SM Split CS Standard Package .............................................6

General Description ..................................................... 6
Moving and Storage ..................................................... 6
Initial Inspection .......................................................... 6

Unit Installation ..................................................................7

Location Selection...............................................................7

Condensing Section Location ........................................ 7
Air Handler Location..................................................... 7

Installation .........................................................................7

Condensing Section Installation..................................... 7
Condensate Drain........................................................ 8
Water Piping ............................................................... 8

Refrigerant Lines ................................................................9

Linear vs. Equivalent Line Length ................................... 9
Connecting Refrigerant Lines......................................... 9
Additional Adjustments Required when Pairing SM Split CS
with BVA2.0 and BMAC .............................................. 11

Water Quality Table...........................................................14

Electrical .................................................................. 15

Safety Devices and the UPM Controller...............................16

Typical System Setup ........................................................19

Specific Application Considerations ............................. 20
Well Water Systems ................................................... 20
Cooling Tower/Boiler Systems..................................... 20
Geothermal Systems.................................................. 20

Post-Installation System Checkout.....................................21

System Operation .............................................................21

Unit Start-up.....................................................................21

Sequence of Operation ......................................................21

Standard Factory-Installed Components.............................23

Pump/Valve Relay...................................................... 23

Field-Installed Accessories ................................................23

Flow Proving Switch (DPS) ......................................... 23
SmartStart Assist Specifications.................................. 24
SmartStart Assist Modes of Operations......................... 24

Check-Out Sheet ...............................................................27

Troubleshooting................................................................28

SmartStart Assist Troubleshooting ............................... 30
SmartStart Assist Flashing Sequence............................ 30
UPM LED Status Indicator (Blink Code) Information........ 31

Compressor Ohms .....................................................31

Operating Temperatures and Pressures.............................. 32

Maintenance .................................................................... 36

Water Side Pressure Drop in PSIG ................................36

Decommissioning Information ........................................... 37

Protecting the Environment .........................................37

Wiring Diagrams ............................................................... 38

Dimensional Drawings....................................................... 39

Terminology ..................................................................... 40

Acronyms .................................................................40
Terms.......................................................................40

Notes ............................................................................... 41

Содержание SM Split CS Series

Страница 1: ...Installation Operation and Maintenance Manual SM Split CS Series Heat Pump 8733825873 2020 05 SM024 SM036 SM048 SM060 ...

Страница 2: ... Safety Devices and the UPM Controller 16 Typical System Setup 19 Specific Application Considerations 20 Well Water Systems 20 Cooling Tower Boiler Systems 20 Geothermal Systems 20 Post Installation System Checkout 21 System Operation 21 Unit Start up 21 Sequence of Operation 21 Standard Factory Installed Components 23 Pump Valve Relay 23 Field Installed Accessories 23 Flow Proving Switch DPS 23 S...

Страница 3: ...hock could cause personal injury or death WARNING FLAMMABLE REFRIGERANT R410A is flammable when exposed to open flame Recover all refrigerant prior to brazing WARNING When working on equipment always observe precautions described in the literature tags and labels attached to the unit Follow all safety codes Wear safety glasses and work gloves Use a quenching cloth for brazing and place a fire exti...

Страница 4: ...ONS C COPPER N CUPRO NICKEL WATER CONNECTIONS F FRONT RETURN AIR CONFIGURATION X NONE DISCHARGE AIR CONFIGURATION X NONE FAN MOTOR OPTIONS X NONE AIR COIL N NONE REVISION LEVEL CODE STRING REV LEVEL STANDARD SPECIAL S STANDARD NOT USED DRIVE SPEED X NONE ELECTRIC HEAT X NONE CABINET CONSTRUCTION H PAINTED STEEL CLOSED CELL FOAM APPLICATION G EXTENDED RANGE GENERAL ELECTRICAL OPTIONS REFRIGERATION ...

Страница 5: ... Pairing 3 Pairing 4 SM024 1CS SM024 1AVX SM024 1AHX BMAC2430BNTD BVA 24WN1 M20 SM036 1CS SM036 1AVX SM036 1AHX BMAC3036BNTD BVA 36WN1 M20 SM048 1CS SM048 1AVX SM048 1AHX BMAC4248CNTF BVA 48WN1 M20 SM060 1CS SM060 1AVX SM060 1AHX BMAC4860CNTF BVA 60WN1 M20 LEGEND AV BOSCH Box Style Vertical Air Handler AH BOSCH Box Style Horizontal Air Handler BMAC BOSCH Cased Uncased Coil BVA2 0 BOSCH Unitary Sty...

Страница 6: ... F to 80 F in the heating mode and between 50 F to 110 F in the cooling mode Safety devices are built into each unit to provide the maximum system protection possible when properly installed and maintained 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 and dry area Units mu...

Страница 7: ...e degree of levelness The cement pad should not come in contact with the foundation or side of the dwelling because sound may be transmitted into the residence See Fig 3 below Subject Page Location Selection 7 Installation 7 Piping 8 Electrical 15 Safety Devices and the UPM Controller 16 Specific Application Considerations 20 Post Installation System Checkout 21 NOTICE To avoid equipment damage DO...

Страница 8: ...tions anticipating moderate scale formation or in brackish water a cupro nickel heat exchanger is recommended Both the supply and discharge water lines will sweat if subjected to low water temperature These lines must be insulated to prevent damage from condensation All manual flow valves used in the system must be ball valves supplied by others Globe and gate valves must not be used due to their ...

Страница 9: ...efrigerant so oil return to the compressor is always a consideration in line sizing Suction lines on split system heat pumps are also hot gas lines in the heating mode but are treated as suction lines for sizing purposes If the recommended suction lines sizes are used there should be no problem with oil return Vertical lines should be kept to a minimum Vertical liquid lines will have a vertical li...

Страница 10: ...dy temperature must remain below 250 F to protect the internal rubber O rings and seals Unit Size Line Type Valve Conn Size Hex Allen Wrench Size SM024 036 Suction 3 4 5 16 SM048 060 Suction 7 8 5 16 ALL Liquid 3 8 3 16 Pump down must never be used with heat pumps System Models Factory R410A Charge Oz Refrigerant Line O D Size Based on Equivalent Line Length Suction Line Riser Max 25 FT 36 FT 45 F...

Страница 11: ...ne size as per Table 2 2 Adjust TXV as per Table 6 or Table 7 as appropriate 3 Adjust BVA motor setting as per Table 8 to obtain the rated airflow Refer to the BVA2 0 operational manual for additional airflow settings Charge Adjustments oz for SM Split CS when Paired with BOSCH BVA2 0 Table 4 Charge Adjustments oz for SM Split CS when Paired with BOSCH BVA2 0 LIQUID LINE SIZE O D 1 4 5 16 3 8 1 2 ...

Страница 12: ...Split CS when Paired with BOSCH BVA2 0 CS MODEL Cased Uncased Coil Model BMAC2430BNTD BMAC3036BNTD BMAC4248CNTF BMAC4860CNTF SM024 1CSC 10 SM024 1CSN 11 SM036 1CSC 4 SM036 1CSN 4 SM048 1CSC 12 SM048 1CSN 10 SM060 1CSC 10 SM060 1CSN 10 CS MODEL Air Handler Model BVA 24WN1 M20 BVA 36WN1 M20 BVA 48WN1 M20 BVA 60WN1 M20 SM024 1CSC None SM024 1CSN None SM036 1CSC SM 1 Turn Closed BVA None SM036 1CSN SM...

Страница 13: ...Paired with SM Split CS Models CS MODEL Cased Uncased Coil Model BMAC2430BNTD BMAC3036BNTD BMAC4248CNTF BMAC4860CNTF SM024 1CSC None SM024 1CSN None SM036 1CSC SM 1 Turn Closed BMAC None SM036 1CSN SM 1 None BMAC None SM048 1CSC SM 1 Turn Closed BMAC None SM048 1CSN SM 1 Turn Closed BMAC None SM060 1CSC SM None BMAC 1 Turn Closed SM060 1CSN SM None BMAC 1 Turn Closed CS Model Air Handler Full Load...

Страница 14: ... 0 5 0 5 0 5 CORROSION Hydrogen Sulfide H2S 0 5 ppm 10 50 ppm Sulfates 125 ppm 125 ppm Chlorine 0 5 ppm 0 5 ppm Chlorides 20 ppm 150 ppm Carbon Dioxide 50 ppm 50 ppm Ammonia 2 ppm 2 ppm Ammonia Chloride 0 5 ppm 0 5 ppm Ammonia Nitrate 0 5 ppm 0 5 ppm Ammonia Hydroxide 0 5 ppm 0 5 ppm Ammonia Sulfate 0 5 ppm 0 5 ppm Dissolved Solids 1 000 ppm 1 500 ppm IRON FOULING Iron Fe2 Iron Bacteria Potential ...

Страница 15: ... Contactor 2 Unit Protection Module UPM 3 Low Voltage Terminal Block 4 Pump Valve Relay 5 Capacitor 6 SmartStart Assist Field Installed Accessory 7 Grounding Lug WARNING UNIT OPERATION AND SAFETY HAZARD Field wiring must comply with local and national electric codes WARNING UNIT OPERATION AND SAFETY HAZARD Properly sized fuses or HACR circuit breakers must be installed for branch circuit protectio...

Страница 16: ...controls include the following High pressure switch located in the refrigerant discharge line and wired across the HPC terminals on the UPM Low pressure switch located in the unit refrigerant suction line and wired across terminals LPC1 and LPC2 on the UPM Water side freeze protection sensor mounted close to condensing water coil monitors refrigerant temperature between condensing water coil and t...

Страница 17: ...ng and the low pressure switch opens the controller will keep the compressor ON for 120 seconds If after 120 seconds the low pressure switch remains open the controllers will shut down the compressor and enter a soft lockout The compressor will not be energized until the low pressure switch closes and the anti short cycle time delay expires If the low pressure switch opens 2 or 4 times in 1 hour t...

Страница 18: ...tatus LED and the Alarm contact will be active The LED will flash 3 times the code associated with this alarm condition If this alarm occurs 2 times or 4 if Dip switch is set to 4 within an hour the UPM controller will enter into a hard lockout condition It will constantly monitor the refrigerant temperature with the sensor mounted close to the evaporator between the thermal expansion valve and ev...

Страница 19: ...2 Low Voltage Control Connection 3 Vibration Pad 4 Ball Valves 5 Solenoid Valve Slow Closing 6 Condensate Drain Connection 7 Drain Valves 8 Hose Kits optional 9 Pressure Tank optional 10 P T Ports optional 11 Line Voltage Connection 12 Electric Heater Line Voltage Disconnect 13 Unit Line Voltage Disconnect 14 Ground Loop Pumping Package For Reference Only A typical setup is shown for illustration ...

Страница 20: ...between the unit and the open cooling tower may also be used It is imperative that all air be eliminated from the closed loop side of the heat exchanger to ensure against fouling In the heating mode heat is absorbed from the water loop A boiler can be utilized to maintain the loop at the desired temperature Cooling Tower Boiler Systems Piping Consult Bosch SM split CS ESS Engineer Submittal Sheet ...

Страница 21: ... the lowest setting 9 Set the thermostat switch to HEAT 10 Increase the thermostat setting approximately five degrees above the room temperature 11 Verify the heat pump is operating in the heating mode 12 Set the thermostat to maintain the desired space temperature 13 Check for vibrations leaks etc SEQUENCE OF OPERATION Cooling Mode Energizing the O terminal energizes the unit reversing valve thus...

Страница 22: ...l shut off as soon as W1 is de energized and the compressors will remain on until the thermostat stages are satisfied Once the thermostat is satisfied the compressor shuts down and the fan ramps down to either fan only mode or off over a span of 30 seconds If thermostat has two different output points one for Auxiliary heat and a different one for Emergency heat the two outputs must be terminated ...

Страница 23: ... heat exchanger in the heat pump The DPS operates by monitoring the water side pressure drop across the water to refrigerant heat exchanger When the pressure drop between the water in and water out lines reaches a preset value compressor operation is enabled SmartStart Assist The SM series is available with the SmartStart Assist device as a field installed accessory This device reduces starting in...

Страница 24: ...martStart Assist Modes of Operations Normal and Undervoltage Condition SmartStart Assist Specifications Rated Operational Voltage 208 230VACrms 15 50 60 Hz Environmental Operating Range 4 to 149 F 20 to 65 C 95 40 C relative humidity non condensing Degree of Protection IP20 Overvoltage Category II Operational Rated Current 32 Amps Max Starting Current Min Full Load Current 80A ACrms 80A ACrms Min ...

Страница 25: ...t the minimum time from stop to start is respected When opening L L1 the SmartStart Assist will stop without any ramp down 4 In the case of an under voltage the SmartStart Assist will shut down and the red LED flashes two times as long as the under voltage is present Once the main voltage is restored the red LED will continue flashing for five minutes Following these five minutes six minutes for H...

Страница 26: ...rvention is required to reset the controller 8 During the recovery from under voltage overcurrent and incomplete ramp alarms the red LED will flash twice the normal flashing frequency using the same number of flashes Fig 12 shows the flashing in case of a recovery from an undervoltage alarm 9 During the recovery time between starts the SmartStart Assist will be continuously ON until the necessary ...

Страница 27: ...pacity Operating Conditions Cooling Mode Heating Mode Entering Leaving Air Temp Entering Air Measured at Leaving Air Measured at Entering Leaving Fluid Temp Fluid Flow gpm Compressor Volts Amps Blower Motor Volts Amps Source Fluid Types Fluid Flow gpm Fluid Side Pressure Drop Suction Discharge Pressure psig Suction Discharge Temp Suction Superheat Entering TXV Cap Tube Temp Liquid Subcooling Requi...

Страница 28: ...ilable on the condensing section low voltage terminal strip between R and C Y and C and O and C If the blower does not operate verify that there is 24 volts between terminals G and C in the air handler Replace the thermostat if defective UNIT OFF DUE TO HIGH PRESSURE CONTROL Discharge Pressure is Too High If in COOLING mode Lack of or inadequate water flow Entering water temperature is too warm Sc...

Страница 29: ...windows Airflow Lack of adequate airflow or improper distribution of air Replace dirty filter Refrigerant Charge Refrigerant charge low causing inefficient operation Compressor Check for defective compressor If discharge is too low and suction pressure is too high compressor is not pumping properly Replace compressor Reversing Valve Defective reversing valve creating bypass of refrigerant from dis...

Страница 30: ...FLASHES 11 14 incomplete ramp Auto reset with 5 mins recovery N A 11 12 Supply phase loss Physical check N A 11 12 Idle state N A 11 12 Ramping state N A 11 12 Bypass mode Green Led Relay Contact Condition Action FLASHING 11 12 Power supply alarm Replace SmartStart device FULLY ON 11 12 Idle State RSBS waiting for control signal to start APPLICABLE TO RSBS2332A2V 2C24HP FOR MODELS NO INDICATION ON...

Страница 31: ...tatus Indications Compressor Ohms Table 16 Compressor Ohms Indication Color Blinks Description GREEN Solid 18 30 VAC power is present RED 1 High pressure lockout RED 2 Low pressure lockout RED 3 Freeze sensor lockout RED 4 Condensate overflow RED 5 Brownout RED 6 Evaporator Freeze condition Model Start Winding Run Winding SM024 1 64 1 30 SM036 1 52 0 88 SM048 1 86 0 52 SM060 1 63 0 39 Tolerance 7 ...

Страница 32: ...41 172 335 411 7 9 17 20 100 4 151 185 402 492 13 15 15 18 8 146 177 378 459 7 9 16 19 SM024 FULL LOAD 30 4 76 92 242 297 3 4 13 14 8 80 97 249 304 2 3 13 15 40 4 125 151 180 221 14 18 19 22 89 108 255 312 4 5 15 17 8 120 146 169 207 8 10 20 23 93 113 261 320 3 3 16 18 50 4 134 163 221 258 14 18 18 21 106 118 267 327 5 6 17 19 8 129 157 198 242 8 10 19 23 110 126 274 335 3 4 18 21 60 4 139 169 241...

Страница 33: ...338 414 7 9 17 21 154 188 355 434 8 10 31 38 100 4 5 149 182 405 495 13 15 15 19 9 0 143 174 381 465 7 9 16 20 SM036 FULL LOAD 30 4 5 74 90 244 299 3 4 13 15 9 0 78 95 251 306 2 3 13 16 40 4 5 122 149 183 224 14 18 19 23 87 106 257 314 4 5 15 18 9 0 117 143 172 210 8 10 20 24 91 111 263 322 3 3 16 19 50 4 5 131 160 214 261 14 18 18 22 95 105 269 329 5 6 17 20 9 0 126 154 201 245 8 10 19 24 100 125...

Страница 34: ...9 12 18 22 100 6 0 139 170 392 480 16 20 16 20 12 0 133 163 369 451 9 11 17 21 SM048 FULL LOAD 30 6 0 71 87 277 339 6 7 15 19 12 0 75 92 284 347 4 5 16 20 40 6 0 118 144 194 237 21 25 19 23 84 102 291 356 7 9 18 22 12 0 113 138 182 223 12 14 20 24 88 108 299 365 5 6 19 23 50 6 0 127 155 226 276 21 25 18 22 92 110 305 373 9 11 20 25 12 0 122 149 213 260 12 14 19 24 98 120 313 383 6 7 21 26 60 6 0 1...

Страница 35: ...98 10 12 19 23 100 7 0 128 157 378 462 16 19 17 21 14 0 125 152 353 432 11 13 18 22 SM060 FULL LOAD 30 7 0 68 84 256 313 5 7 19 23 14 0 73 89 261 319 4 5 20 25 40 7 0 117 143 182 222 15 19 21 26 81 99 277 339 7 8 22 26 14 0 114 139 170 208 11 14 22 27 86 105 283 346 5 6 23 28 50 7 0 120 147 215 263 15 18 20 25 93 114 299 365 8 9 24 29 14 0 117 143 201 246 11 14 21 26 99 121 305 373 6 7 25 31 60 7 ...

Страница 36: ...otor oil The condensate drain should be checked annually by cleaning and flushing to insure proper drainage Periodic lockouts almost always are caused by air or water flow problems The lockout shutdown of the unit is a normal protective measure in the design of the equipment If continual lockouts occur call a mechanic immediately and have them check for water flow problems water temperature proble...

Страница 37: ...rrectly you will help ensure that the waste undergoes the necessary treatment recovery and recycling thus preventing potentially negative effects on the environment and human health which could otherwise arise due to inappropriate waste handling Many parts in the Heat Pump can be fully recycled at the end of the product life Contact your city authorities for information about the disposal of recyc...

Страница 38: ...s Heat Pump 8733825873 2020 05 38 Wiring Diagrams Subject to change without prior notice WIRING DIAGRAMS Fig 15 Wiring Diagrams FOR REFERENCE ONLY Actual unit wiring may vary from this example Always refer to the wiring diagram attached to the unit ...

Страница 39: ...733825873 2020 05 SM Split CS Series Heat Pump Subject to change without prior notice DIMENSIONAL DRAWINGS Fig 16 Dimensional Drawings FOR REFERENCE ONLY Actual unit wiring may vary from this example Always refer to the wiring diagram attached to the unit ...

Страница 40: ...ing Means the final shut down and removal from operation or usage of a product or piece of equipment containing fluorinated greenhouse gases Discharge Pressure Referring to the pressure leaving compressor Reclamation Means the reprocessing of a recovered fluorinated greenhouse gas in order to match the equivalent performance of a virgin substance taking into account its intended use Recovery Refer...

Страница 41: ...Notes 41 SM Split CS Series Heat Pump 8733825873 2020 05 SM Split CS Series Heat Pump Subject to change without prior notice NOTES ...

Страница 42: ...SM Split CS Series Heat Pump SM Split CS Series Heat Pump 8733825873 2020 05 42 Notes Subject to change without prior notice NOTES ...

Страница 43: ...Notes 43 SM Split CS Series Heat Pump 8733825873 2020 05 SM Split CS Series Heat Pump Subject to change without prior notice NOTES ...

Страница 44: ...Bosch Thermotechnology Corp 65 Grove Street Watertown MA 02472 Phone 1 800 283 3787 Fax 1 603 965 7568 www bosch climate us com Revised 05 2020 8733825873 ...

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