Daikin DV25PTCB14 Series - User Manual

DV**PTC*14 SERIES AIR HANDLERS
IOD-4021K
06/2021
Only personnel that have been trained to install, adjust, service
or repair (hereinafter, “service”) the equipment specified in
this manual should service the equipment. The manufacturer
will not be responsible for any injury or property damage
arising from improper service or service procedures. If you
service this unit, you assume responsibility for any injury or
property damage which may result. In addition, in jurisdictions
that require one or more licenses to service the equipment
specified in this manual, only licensed personnel should service
the equipment. Improper installation, adjustment, servicing
or repair of the equipment specified in this manual, or
attempting to install, adjust, service or repair the equipment
specified in this manual without proper training may result in
product damage, property damage, personal injury or death.
INSTALLATION INSTRUCTIONS
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19001 Kermier Road Waller, TX 77484
Index
1 Important Safety Instructions ................................................................ 2
2 Shipping Inspection ............................................................................... 3
2.1 Parts ............................................................................................... 3
2.2 Handling .......................................................................................... 3
3 Codes & Regulations ............................................................................. 3
4 Replacement Parts ................................................................................. 3
5 Pre-Installation Considerations ............................................................ 3
5.1 Preparation ..................................................................................... 3
5.2 System Matches ............................................................................. 3
5.3 Interconnecting Tubing ................................................................... 4
5.4 Clearances ...................................................................................... 4
5.5 Horizontal Applications ................................................................... 4
6 Installation Location ......................................................... 4
6.1 Upow Installation ........................................................................... 4
6.2 Horizontal Left Installation .............................................................. 4
6.3 Downow/Horizontal Right Installation ........................................... 4
7 Refrigerant Lines .................................................................................... 6
7.1 Tubing Size ..................................................................................... 6
7.2 Tubing Preparation ......................................................................... 6
7.3 Tubing Connections for TXV Models .............................................. 7
7.4 Thermal Expansion Valve System Adjustment ............................... 8
8 Condensate Drain Lines .................................................. 8
9 Ductwork ......................................................................... 10
9.1 Thermal Expansion Valve System Adjustment ...................................... 10
10 Return Air Filters .................................................................................. 10
11 Electric Heat .......................................................................................... 10
12 Electrical and Control Wiring ..............................................................11
12.1 Building Electrical Service Inspection ..........................................11
12.2 Wire Sizing ...................................................................................11
12.3 Maximum Overcurrent Protection (MOP) ....................................11
12.4 Electrical Connections – Supply Voltage .................................... 12
12.4.1 Air Handler Only (Non-Heat Kit Models) .................................. 12
12.4.2 Air Handler - Non-Circuit Breaker Heat Kits ............................. 12
12.4.3 Air Handler With Circuit Breaker Heat Kit ................................ 12
12.5 Low Voltage Connections ........................................................... 12
13 Achieving 1.4% and 2.0% Airow Low Leakage Rate ......................11
14 Start-Up Procedure ............................................................................. 12
15 Regular Maintenance ......................................................................... 12
16 Circulator Blower ................................................................................ 15
17 Troubleshooting ................................................................................. 17
© 2014 - 2021
If an “Ec” error is encountered on
startup, verify that the electric heater
DIP switches have been set to the
appropriate heater size. See pages
14-17 for the heater kit airflow
delivery and DIP switch se�ngs.
NOTICE

Summary

Important Safety Instructions

Pre-Installation Considerations

Preparation for Installation

Read all instructions, assemble tools, and ensure all necessary supplies are available before installation.

System Matches and AHRI Listing

Ensuring the complete HVAC system is manufacturer approved and AHRI listed for proper operation.

Installation Location Requirements

Refrigerant Line Installation and Adjustment

Thermal Expansion Valve System Adjustment

Procedure for adjusting the TXV valve to achieve correct subcooling and superheat.

Condensate Drain Line Installation

Ductwork Installation and Requirements

Electric Heat Kit Installation

Electrical and Control Wiring

Building Electrical Service Inspection

Wire Sizing and Safety

Maximum Overcurrent Protection (MOP)

Supply Voltage Electrical Connections

Specifics for connecting supply voltage, including knockouts, adapter rings, and strain reliefs.

Low Voltage Connections

Unit Start-Up Procedure

Regular Maintenance Recommendations

Non-Communicating Thermostat Wiring

Circulator Blower Speed Adjustment

Troubleshooting and Diagnostic Codes

Electrostatic Discharge (ESD) Precautions

Steps to protect the integrated control module from static discharge during handling and servicing.

Diagnostic Chart for Unit Problems

Reference chart to identify unit operational problems based on fault codes displayed by the 7-segment LED.

Fault Recall Procedure

Fully Communicating Daikin System

System Overview and Interaction

Airflow Demand Management

Control Wiring for Communicating Systems

System Diagnostics and Network

Accessing fault history and troubleshooting network communication issues using LEDs and a learn button.

Final Unit Start-Up Procedures

Diagnostic Codes and Conditions

Wiring Diagrams and Component Codes

Daikin DV25PTCB14 Series Specifications

General

Model	DV25PTCB14
Refrigerant	R-410A
Seasonal Energy Efficiency Ratio (SEER)	Up to 16
Phase	1
Weight	112 lbs
Type	Air Handler
Cooling Capacity	24, 000 BTU/H
Voltage	208/230V
Filter Type	Standard