Table of Contents

Important Safety Information

2-4

Introduction

4

Vert-I-Pak Model Number Identification Guide

5

Serial Number Identification Guide

5

Chassis Specifications

6

Extended Cooling Performance

7

Electrical Requirements

8

Remote Thermostat and Low Voltage Control

9-10

V-PAK Electronic Control Board Features

11

Electronic Control Configuration

12

Electronic Control Error Code

 

Diagnostics/Test Mode

12-13

Electronic Control Features

14

Checking External Static Pressure

15

Checking Approximate Airflow

16

Airflow Charts

16

Components Testing

17-18

Refrigeration Sequence of Operation

19

Service

20

Sealed Refrigeration System Repairs

21

Refrigerant Charging

21

Method Of Charging

22

Undercharged Refrigerant Systems

22-23

Overcharged Refrigerant Systems

23

Restricted Refrigerant Systems

23

Capillary Tube Systems/Check Valve

24

Reversing Valve — Description/Operation

25

Testing Coil

25

Checking Reversing Valves

25-26

Reversing Valve

 

Touch Testing Heating/Cooling Cycle

26

Procedure For Changing Reversing Valve

26-27

Compressor Checks

27

Locked Rotor Voltage Test

27

Single Phase Connections

27

Determine Locked Rotor Voltage

27

Locked Rotor Amperage Test

27

Single Phase Running & Locked Rotor Amperage

27

Checking the Overload

27-28

External Overload

28

Compressor Single Phase Resistance Test

28

Compressor Replacement

29-30

Routine Maintenance

30

9-18 Electrical Troubleshooting Chart – Cooling

31

2-Ton Electrical Troubleshooting Chart – Cooling

32

Electrical Troubleshooting Chart – Heat Pump

33

Refrigerant System Diagnosis – Cooling

34

Refrigerant System Diagnosis – Heating

34

Electrical and Thermostat Wiring Diagrams

35-40

Technical Service Data

41

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Friedrich H)A24K25L, R410A, H)A12K25L, H)A09K34L, H)A12K50L, H)A12K34L, H)A24K10L, H)A24K34L, H)A09K50L Table of Contents

H)A09K25L, H)A12K50L, H)A09K50L, H)A24K10L, H)A24K25L specifications

Friedrich R410A is a refrigerant blend that has become a cornerstone in the HVAC industry, particularly for air conditioning systems. This hydrofluorocarbon (HFC) is known for its efficiency and environmentally friendly properties, making it a popular alternative to older refrigerants like R22.

One of the main features of R410A is its exceptional thermal efficiency. It has a higher cooling capacity compared to R22, which allows for smaller and more efficient equipment. This efficiency translates to reduced energy consumption and lower operating costs for users. Additionally, the higher pressure capability of R410A enables the design of more compact systems, which is particularly beneficial for residential and commercial applications where space is often limited.

R410A is characterized by its zero ozone depletion potential (ODP), which is a significant advantage over its predecessors. This makes it a more environmentally responsible choice, aligning with global initiatives to phase out substances that harm the ozone layer. However, it is essential to note that while R410A does not deplete the ozone, it does have a global warming potential (GWP) of approximately 2,088, making it less favorable in terms of climate impact compared to natural refrigerants.

In terms of technology, R410A is typically utilized in systems that are designed specifically for this refrigerant. Equipment compatible with R410A often features advanced components that can handle the higher pressures required. Many modern air conditioning systems equipped with R410A also incorporate variable-speed compressors and advanced electronic controls, enhancing overall performance and comfort.

Additionally, R410A systems often come equipped with variable refrigerant flow (VRF) technology, which allows for precise temperature control in multiple zones of a building. This versatility makes R410A an ideal choice for both residential and commercial installations, providing optimal comfort throughout various spaces.

In summary, Friedrich R410A stands out due to its high energy efficiency, zero ozone depletion potential, and suitability for modern HVAC technologies. As the industry moves towards more sustainable practices, R410A serves as a reliable refrigerant that balances performance with environmental responsibility. It’s a significant choice for anyone looking to invest in efficient and eco-friendly heating and cooling solutions.