Bosch RF Series - UPM Sequence of Operation

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Safety Devices and the UPM Controller Overview

12.3 UPM Sequence of Operation

Fig. 22 UPM Sequence of Operation Flowchart

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RF Series Heat Pumps — 8733980022 (2024/12)

Main Page

Table of Contents2
Document Conventions3
Key to Symbols3
General Safety Instructions3
Refrigerant Safety Warnings4
Model Nomenclature6
General Description7
Operating Limits8
Approved Supplementary Heaters9
Inspecting and Storing the Equipment10
Moving and Storage10
Initial Inspection10
Inspection and Unpacking Prior to Installation10
RF Unit Installation11
Location Selection11
Minimum Conditioned Room Area12
Protecting the Unit During Construction12
Return and Supply Air Duct Flanges Preparation12
Mounting Vertical (VT) Units12
Horizontal (HZ) Units13
Mounting Horizontal (HZ) Units14
Condensate Drain16
Duct System16
Piping17
Electrical-Power Supply Wiring18
Electrical-Low-Voltage Wiring20
Standard Construction20
ECM Interface Board22
Specific Application Considerations23
Well Water Systems23
Open Well Water Systems23
Cooling Tower/Boiler Systems24
Geothermal Closed-Loop Systems25
Water-Quality Considerations26
Post-Installation System Checkout28
Pre-Start-Up28
Air Coil28
Checking Scroll Compressor Rotation28
Start-Up29
Unit Start up Cooling Mode29
Unit Start up Heating Mode29
Commissioning29
Safety Devices and the UPM Controller Overview30
UPM Default Settings and DIP Switch Positions32
Position Function32
UPM Board Features32
Factory Default32
UPM Sequence of Operation34
Options35
Refrigerant Leak Detection System35
Heat Recovery Package (HRP)35
HRP Water Tank Preparation36
Water Tank Refill37
Initial Start-Up of a HRP System37
Fan Motor Options37
Constant Torque Motors (ECM)37
Constant Airflow Motors (ECM)40
Maintenance47
Filter Changes47
Annual Checkup47
Annual Condensate Drain Cleaning47
Handling Periodic Lockouts47
Servicing and Repair Information47
Personal Protective Equipment47
Confined Space Work47
Controlled Work Procedure47
Safety Checks47
Checks to Electrical Devices48
Repairs to Sealed Components48
Repair to Intrinsically-Safe Components48
Check Cabling48
Detection of Flammable Refrigerants48
Removal and Evacuation49
Charging Procedures49
Recovery49
Service Access50
Decommissioning Information51
Protecting the Environment51
Decommissioning Procedure51
Labeling51
Troubleshooting52
Unit Troubleshooting52
Specification Tables58
Operating Temperatures and Pressures58
Water-Side Pressure Drop Table64
Compressor Characteristics65
Corner Weights (Horizontal Cabinets Only)66
Model 24 Thermistor (Freeze Sensor) Test Values67
Wiring Diagrams68
Single-Stage, Single-Phase, Standard Unit with Constant Torque (CT) Motor68
Single-Stage, Single-Phase, Standard Unit with Constant Airflow (CA) Motor69
Two-Stage, Single-Phase, Standard Unit with CA Motor70
Dimensional Drawings71
Vertical (VT) Unit Dimensions71
Vertical (VT) Cabinet Options Dimensions73
Horizontal (HZ) Unit Dimensions74
Horizontal (HZ) Cabinet Options Dimensions76
Counter Flow Unit Dimensions78
Counter Flow Options Dimensions80
Service Clearance81
Terminology82
Acronyms82
Terms82
Check-Out Sheet83
Unit Nameplate83
Operating Conditions83
Notes84

Bosch RF Series - UPM Sequence of Operation

Table of Contents

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