Name: Friedrich VRP Series
Brand: Friedrich
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52 PB

INSTALLATION

Unit Installation

Unit Placement Prior to Installation

(Front-Install Conguration)

All louver, plenum, rough plumbing, and rough wiring steps must be complete prior to nal installation of the air

conditioning chassis.

FIGURE 411 (Unit Installation)

Table of Contents2
Introduction5
Part Load Performance6
VRP® Variable Speed System Vs. Fixed-Speed System7
Freshaire™ Conditioned Fresh Air8
Reheat Coil - Augments Vrp's Dehumidification Capability9
Important Safety Information10
Personal Injury or Death Hazards12
Model and Serial Number Identification Guides13
Specifications14
Cooling Performance14
12K/24K Extended Cooling Performance Data15
And 24K Extended Heating Performance Data16
Air Flow Data -12K and 24K17
Electrical Data18
12K and 24K Unit Dimensional Data19
12K and 24K Unit Installation Dimensional Data20
12K and 24K Accessories Dimensional Data-Louvers & Return Access Door21
12K and 24K Accessories Dimensional Data - Wall Plenums22
Operation23
Sequence of Operations23
Freshaire Control24
Component Identification25
Indoor Coil 12 & 24K26
Indoor Blower27
Outdoor Coil28
Outdoor Fan29
Compressor30
Electric Heater31
Electronic Expansion Valve32
4-Way Reversing Valve33
Remaining Components (Side View)34
VRP Control Boards35
Main Controller36
Compressor Control37
EEV Control38
Reheat Control39
Installation40
VRP Required Minimum Clearances41
Installation Orientations 12&24K42
Exterior Wall Opening Dimensions 12 &24K43
Interior(Closet) Wall Opening Dimensions 12 & 24K44
Preliminary Plumbing45
Wall Plenum Installation 12 & 24K46
Louver Installation50
Final Wall Plenum and Architectual Louver Installation51
Unit Installation52
Final Unit Installation Overview53
Side Configuration Installation54
Unit Drain Installation55
Ductwork Installation56
Wall Controller Installation 12 & 24K57
Return Air Door Installation12 & 24K60
Freshaire System Set-Up and Operation61
Final Installation Checklist62
Troubleshooting63
VRP Troubleshooting Map63
Required Tools64
Required Skills65
Troubleshooting by Rule out Methodology65
Diagnostic Codes66
Check for Power70
Diagnostic Code (Temperature Based)71
R-410A Sealed System Repair72
Refrigerant Charging73
Undercharged Refrigerant Systems74
Overcharged Refrigerant Systems75
Restricted Refrigerant System76
Sealed System Method of Charging/ Repairs77
Compressor Replacement78
Compressor Replacement -Special Procedure in Case of Compressor Burnout79
Replace the Reversing Valve80
Replace the Condensor Coil 12K/24K81
Replace the Evaporator Coil 12K/24K82
Replace the Evaporator Coil Drain Pan83
Component Testing84
Electronic Expansion Valve (EEV)84
Reversing Valve Description and Operation85
Testing the Reversing Valve Solenoid Coil86
Checking the Reversing Valve87
Testing the Reheat Valve Solenoid Coils88
Touch Test Chart : to Service Reversing Valves89
Compressor Checks90
Check the Outdoor Fan 12K91
Replace the Outdoor Fan 12K92
Check the Indoor Fan93
Replace the Indoor Fan 12K/24K94
Check the Heating Elements95
Replace the Heating Elements96
Driver Board Pin out97
Driver Board Replacement98
Check RS-485 Converterboard99
Fmc Board Pin out100
FMC Board Replacement101
Heater Board Pin out102
Heater Board Replacement103
Thermistor Locations104
T8 (Return Air Sensor)104
T1 (Evaporator Coil in Sensor)105
T5 (Evaporator Coil out Sensor)105
T9 (Discharge Air Sensor)106
T2 (Liquid Heat)107
T6 (Liquid Cool)107
T10 (Outdoor Ambient Air Sensor)108
T7 (Cond. Coil Sensor)109
T4 (Comp. Discharge)110
T3 (Comp. Suction)111
Thermistor Part Numbers112
Replace Transformer113
Check High and Low Pressure Limit Switches114
Check Basepan Heater115
Updating Vrp Firmware116
FMC Manual Update Process - Remove SD Card from FMC Load on a PC or Laptop116
FMC Update Process - Delete Current Files or Format SD Card117
FMC Update Process - Unzip Files to Blank or Formatted SD Card118
FMC Update Process - Verify Files on SD Card Drive119
FMC Update Process - Loading New Firmware119
Wiring Diagrams120
Btu (E Models) (208/230V 2.5, 3.4, & 5.0 Kw)120
BTU (E MODELS) (265V 2.5, 3.4, & 5.0 Kw)121
Parts Catalog122
E Models (Unit Assembly)122
12K E Models Basepan132
E Models (230V Electrical Controls)133
E Models (265V Electrical Controls)135
Accessories137
Accessories138
Wall Controller/ Thermostat138
Installation Accessories and Descriptions139
Appendix141
Thermistor Values141
CUSTOMER SATISFACTION and QUALITY ASSURANCE143
Friedrich Authorized Parts Depots143

Friedrich VRP Series Service & Parts Manual

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Friedrich VRP Series Specifications

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Brand	Friedrich
Model	VRP Series
Category	Heat Pump
Language	English