Bosch MC Series - Page 2

68 pages

Save Page as PDF

To Next Page

To Previous Page

Installation, Operation, and Maintenance Manual

MC Series Heat Pumps - 8733850301 (2025/02) US

2 |

Main Page

Table of Contents3
Document Conventions5
Key to Symbols5
Important Information5
Additional Symbols5
General Safety Instructions5
Refrigerant Safety Warnings6
Model Nomenclature8
General Description9
Operating Limits9
Environment9
Power Supply9
Unit Starting Conditions9
Normal Operating Conditions9
Inspecting and Storing the Equipment10
Moving and Storage10
Initial Inspection10
Inspection and Unpacking Prior to Installation10
Unit Installation11
Location Selection11
Minimum Conditioned Room Area12
Protecting the Unit During Construction13
Condensate Drain13
Duct System13
Piping13
Installation of Pressure Regulating Valves14
Discharge Water14
Antifreeze14
Electrical-Power Supply Wiring15
Electrical Component Box Layout15
High-Voltage Wiring15
Electrical-Low-Voltage Wiring16
Product Damage16
Units with Dual Power Supplies16
Transformer Settings for 208/230-V Units16
Thermostat16
Thermostats with a Malfunction Light17
Thermostat to HVAC Equipment Wiring17
Remote Sensor to Programmable Thermostat Wiring17
VA Capacity17
Low-Voltage VA Draw18
Specific Application Considerations19
Well Water Systems19
Cooling Tower/Boiler Systems20
Water-Quality Considerations21
Post-Installation System Checkout23
Pre-Start-Up23
Checking Pulley Alignment and Belt Tensioning23
Checking Scroll Compressor Rotation23
Correcting Direction of Rotation23
Start-Up24
Unit Start up Cooling Mode24
Unit Start up Heating Mode24
Commissioning24
Safety Devices and the UPM Controller Overview25
First-Stage UPM Board/S25
Second-Stage UPM Board/S26
UPM Default Settings and DIP Switch Positions28
UPM Board Features28
Leak Detection System30
UPM Sequence of Operation31
Unit Sequence of Operation by Mode32
Cooling Mode32
Heating Mode32
Factory-Installed Options33
Flow Proving Switch (DPS)33
Boilerless Control33
Variable Frequency Drive (VFD)33
Phase Monitor33
Hot Gas Reheat (HGRH)33
Hot Gas Reheat Sequence of Operation-ON/OFF Control33
Modulating Hot Gas Reheat (MHGRH)33
MHGRH Sequence of Operation33
Hot Gas Bypass34
Limit Switch34
Economizer34
Economizer Sequence of Operation34
Maintenance35
Filter Changes35
Annual Checkup35
Annual Condensate Drain Cleaning35
Blower Motor Lubrication (Optional)35
Handling Periodic Lockouts35
Installing Fan Motor Sheaves35
Pulley Alignment and Belt Tensioning Procedure36
Alignment36
Evaporator Fan Performance Adjustment36
Belt Tension Adjustment36
Servicing and Repair Information37
Confined Space Work37
Controlled Work Procedure37
Safety Checks37
Inform Everyone in the General Work Area37
Check for the Presence of Refrigerant37
Fire Extinguisher37
Ignition Sources37
Ventilated Area37
Checks to the Refrigerating Equipment37
Checks to Electrical Devices38
Repairs to Sealed Components38
Repair to Intrinsically Safe Components38
Check Cabling38
Detection of Flammable Refrigerants38
Removal and Evacuation38
Charging Procedures38
Recovery39
Decommissioning Information40
Decommissioning Procedure40
Unit Troubleshooting41
Specification Tables48
Water-Side Pressure Drop Table53

Bosch MC Series - Page 2

Table of Contents

Related product manuals