Bosch SM024 Specifications Page 35
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Options | 35SM Series Heat Pump
6 720 220 406 (2013/1)SM Series Heat Pump
OPTIONS
Number of factory installed options are available
on SM Series of Heat Pumps. The following details
purpose, function and components of each option.
Hot Gas Reheat (HGRH)
Hot gas reheat is an active dehumidification option
available on the SM series that cools and
dehumidifies return air, and then reheats it back to
approximately entering dry bulb temperature using
waste compressor heat. In this way, a unit with Hot
Gas Reheat can efficiently remove humidity from
the return air without altering the sensible
temperature of the space.
The reheat option consists of a refrigerant to air
heat exchanger (reheat coil) mounted down
stream of the evaporator coil and a refrigerant
diverting valve. When there is a signal for
dehumidification AND the sensible space
temperature is satisfied, the unit will operate in
reheat mode. In reheat mode the heat pump will
operate at full load cooling and will divert
discharge gas from the compressor to the reheat
coil, effectively cooling and dehumidifying the air
and then reheating it back to a temperature close
to the entering dry bulb temperature. If there is a
call for sensible cooling while the unit is operating
in the reheat mode, then the unit will revert to
cooling until the sensible demand is satisfied.
Heat pumps with hot Gas Reheat need to be
connected to a humidistat along with a traditional
thermostat or a combination thermostat/
humidistat.
Electric Heat
Internally mounted supplemental electric heat is
available on select models of the SM series.
Electric heating elements can operate along with
reverse cycle heating as auxiliary heat or in lieu of
mechanical heating (refrigeration heating) as
emergency backup heat.
Heating elements are available in nominal kW
ranges of 5, 10, 15 and 20 - note that not all sizes
are available on all models. Internal mounted
Electric Heat is only available on top blow vertical
cabinets, end blow horizontal cabinet or on down
blow counterflow cabinets.
Heat Recovery Package (HRP)
The heat recover package is a factory installed
option on SM series of heat pumps. The HRP can
be used to heat potable water during unit
operation using waste heat from the compressor
discharge gas. In some cases the HRP can provide
most or all of the hot water requirements for a
typical home.
The HRP consists of three major components:
• double wall, vented refrigerant to water heat
exchanger
• circulating pump
• control circuit
The heat exchanger is rated for use with potable
water and is acceptable for use as a domestic
water heating device in most building codes.
The pump circulates water between the domestic
hot water tank and HRP heat exchanger in the Heat
Pump. The control circuit ensures that the HRP
only operates when there is available heat from the
compressor and when the water is within a safe
temperature range of below 140 deg F.
Hot Gas Reheat (HGRH) Option is not available
on SM024 model.
In cases where Electric Heat is not available in
a desired configuration but is needed, contact
your distributor for available Duct Mounted
Electric Heat Package.
Internal electric heat cannot be provided with
hot gas reheat. Units with internal electric heat
must have 2 field power supplies.
Heater
Model
KW Stgs Btu/h Product Series Compatibility
208V 230V 208V 230V SM024 SM036 SM048 SM060 SM070
HK050-1201 3.6 4.8 1 12300 16300 xxxxx
HK100-1201 7.2 9.6 2 24600 32700 x xxx
HK150-1201 10.8 14.4 2 36900 49100 x x
HK200-1201 14.4 19.2 2 49200 63400 x x
x available
- Heat pump 1
- CONTENTS 2
- MODEL NOMENCLATURE 3
- STANDARD PACKAGE 4
- GENERAL DESCRIPTION 4
- MOVING AND STORAGE 5
- INITIAL INSPECTION 5
- LOCATION 5
- Figure # 6 6
- Figure # 7 6
- Figure # 4 6
- Figure # 5 6
- Figure # 20 9
- Figure # 21 9
- Figure # 22 9
- Figure # 23 9
- Figure # 24 9
- Figure # 25 10
- Figure # 26 10
- Figure # 27 10
- Figure # 28 10
- Figure # 29 10
- Figure # 33 11
- Figure # 34 11
- Figure # 30 11
- Figure # 31 11
- Figure # 32 11
- COUNTER-FLOW CONFIGURABILITY 12
- VERTICAL CONFIGURABILITY 12
- Figure # 39 Back Discharge 13
- Figure # 40 Side Discharge 13
- Figure # 41 13
- Required Tools 14
- Access to Internal Components 14
- Figure # 43 15
- Figure # 44 15
- Figure # 45 15
- Figure # 46 15
- Blower Re-configuration 16
- Figure # 56 18
- Figure # 57 18
- Figure # 58 18
- Figure # 59 18
- Figure # 60 18
- Ensure to retain the spring 19
- HRP Switch Relocation 20
- Electric Heat Relocation 21
- Figure # 80 23
- Figure # 81 23
- Figure # 82 23
- Figure # 83 23
- Reinstall All Panels 24
- Figure # 87 25
- Figure # 88 25
- Figure # 89 25
- Figure # 90 25
- Figure # 91 25
- RETURN AND DISCHARGE DUCT 26
- MOUNTING VERTICAL UNITS 27
- MOUNTING HORIZONTAL UNITS 27
- CONDENSATE DRAIN 27
- DUCT SYSTEM 28
- ELECTRICAL 29
- Figure # 96 30
- Figure # 97 30
- Figure # 98 31
- Figure # 99 31
- ECM INTERFACE BOARD 33
- Hot Gas Reheat (HGRH) 35
- Electric Heat 35
- Heat Recovery Package (HRP) 35
- Figure # 101 36
- Figure # 102 36
- HEAT RECOVERY PACKAGE 38
- Water Tank Preparation 38
- HR Water Piping 38
- Water Tank Refill 38
- Initial Start-Up 39
- SEQUENCE OF OPERATION 40
- Cooling Mode 40
- Heating Mode 40
- APPLICATION CONSIDERATIONS 42
- Well Water Systems 42
- Cooling Tower/Boiler Systems 42
- Geothermal Systems 43
- Figure # 107 44
- SYSTEM CHECKOUT 45
- UNIT START-UP 45
- MAINTENANCE 45
- UNIT CHECK-OUT SHEET 47
- Customer Data 47
- Unit Nameplate Data 47
- Operating Conditions 47
- Auxiliary Heat 47
- UPM Board LED Indications 48
- Unit Troubleshooting 48
- Compressor Ohms 50
- HRP Troubleshooting 51
- ELECTRONIC THERMOSTAT 52
- INSTALLATION 52
- OPERATING TEMPERATURES AND 53
- PRESSURES 53
- COOLING HEATING 54
- AIRFLOW TABLES 58
- (SM0**-***-*** 58
- Table(SM0**-***-***-T*) 59
- WIRING DIAGRAMS 60
- Figure # 114 61
- Figure # 115 62
- Figure # 116 63
- Figure # 117 64
- Figure # 118 65
- Figure # 119 66
- WIRING HARNESS DRAWINGS 67
- Figure # 121 68
- SPARE PARTS LIST 69
- Vertical (VT) 69
- VT Parts List - Cabinet 71
- VT Parts List - Blower 72
- Electrical 73
- 6 720 220 408 (02) 74
- Horizontal (HZ) 76
- HZ Part List - Cabinet 78
- HZ Parts List - Blower 79
- HZ Parts List - Refrigeration 80
- HZ Part List - Panels 81
- HZ Part List - Detailed View 82
- Counter Flow Part List 83
- 6 720 220 430 (00) 85
- DIMENSIONAL DRAWINGS 90
- Horizontal - Straight Through 91
- Figure # 139 92
- Counter Flow 93
- Vertical 94
- Revised 05-12 96
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