Daikin EWYT040CZI-A1 Installation And Maintenance Manual

Air to water heat pump units with scroll compressors – split version

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Table Of Contents

Table of Contents

Table of Contents
Introduction
Precautions against Residual Risks
General Description
Information about the Refrigerant
Safety Devices General Description
Table 1 - Physical Properties of R32 Refrigerant
Installation Site Requirements for the Indoor Unit
Installation Room Area Requirements
Table 2 - Space Requirements: NOT Lowest Underground Floor
Table 3 - Space Requirements: Lowest Underground Floor
Countermeasures
Receipt of the Unit
Storage
Mechanical Installation
Safety
Handling and Lifting
Lifting the Outdoor MONO Unit
Figure 1 - Lifting the Outdoor MONO Unit
Lifting the Outdoor DUAL Unit
Lifting the INDOOR Unit
Figure 2 - Lifting the Outdoor DUAL Unit
Figure 3 - Indoor Unit Handling & LIFTING
Outdoor Unit Positioning and Assembly
Figure 4 - MONO Unit Positioning
Figure 5 - DUAL Unit Positioning
Figure 6 - Mounting Holes Location (Bottom View)
Outdoor Unit Minimum Space Requirements
Figure 7 - DUAL Unit
Indoor Unit Positioning and Assembly
Figure 8 - Units Installed Side by Side Along Their Shorter Sides, B or D
Figure 9 - Units Installed Side by Side Along Their Longer Sides (Case 1 and Case 2)
Additional Installation Site Requirements
Figure 10 - Indoor Unit Minimum Space Requirements
Combining Units and Options
Preparing Refrigerant Piping
Figure 11 - Seaside Installation of the Outdoor Unit
Figure 12 - Piping Scheme Indoor Unit - Outdoor Unit
Table 4 - Temper Grade for Piping Material
Table 5 - Pipe Thickness for R32
Table 6 - Piping Diameters Table
Noise and Sound Protection
Water Circuit for Connection with the Unit
Figure 13 - Hydraulic Diagram
Figure 14 - Hydraulic Elements
Table 7 - Piping Length and Height Difference Table
Water Piping
Flow Switch
Repairing and Checking the Water Circuit Connection
Water Pressure
Water Treatment
Table 8 - Water Piping Diameters
Table 9 - Flow Switch Setpoint
Water Pressure Drops for Filters
Indoor Unit Pump
Figure 15 - Water Filter Pressure Drops
Table 10 - Acceptable Water Quality Limits
Operation Limits
Figure 16 - External Pressure Head of Water Pump
Figure 17 - Operating Limits on EWYT_CZ in Cooling Mode
Table 11 - Pump Curves Associated with each Unit Size
Operating Stability and Minimum Water Content in the System
Figure 18 - Operating Limits on EWYTCZ in Heating Mode
Table 12 - Minimum Water Content in the System
Water Flow Limits
Calibrating the Expansion Vessel
Figure 19 - Minimum Water Volume Correction Factor
Table 13 - Operating Limits
Figure 20 - Initial Expansion Vessel Pressure Based on Maximum Water Volume
Electrical Installation
General Specifications
Electric Connections
Cable Requirements
Maximum Cable Dimension
Safety Device Requirements
Phase Unbalance
Table 14 - Table 1 of EN602041 Point 5.2
Master Wiring Diagram
Figure 21 - Master Wiring Diagram
Table 15 - Reference No. 1
Table 16 - Reference No. 2
Table 17 - Reference No. 3
Connecting the Refrigerant Piping
To Braze the Pipe End
Using the Ball Valve
Figure 22 - Pipe Brazing
Figure 23 - Ball-Valve
To Connect the Refrigerant Piping to the Outdoor Unit
To Connect the Refrigerant Piping to the Indoor Unit
Checking the Refrigerant Piping
Pressure Leak Test
To Perform Vacuum Drying
To Insulate the Refrigerant Piping
Charging Refrigerant
Precautions When Charging Refrigerant
To Determine the Additional Refrigerant Amount
Pre-Charging Refrigerant
Checks after Charging Refrigerant
Operator's Reponsibilities
Maintenance
Pressure / Temperature Table
Routine Maintenance
Table 18 - R32 Pressure/Temperature
Table 19 - Yearly Maintenance Checklist for the Indoor Unit
Table 20 - Standard Routine Maintenance Plan
Air Heat Exchanger Maintenance
Table 21 - Routine Maintenance Plan for Critical Application And/Or Highly Aggressive Environment
Electrical Installation
Service and Limited Warranty
Refrigerant Circuit Scheme
Figure 24 - Refrigerant Circuit (P&ID) Diagram for MONO Circuit EWYT~CZ Unit
Figure 25 - Water Circuit P&ID for EWYT-CZ Units
Figure 26 - Refrigerant Circuit (P&ID) Diagram for DUAL Circuit EWYT~CZ Outdoor Unit
Figure 27 - Refrigerant Circuit (P&ID) Diagram for DUAL Circuit EWYT~CZ Indoor Unit
List of the Labels Applied to the Units
Table 22 - Labels Applied to the Unit
Figure 28 - Labels on the Outdoor Unit
Figure 29 - Labels on the Indoor Unit
Figure 30 - Labels on the Indoor Unit - Electric Panel Side
Commissioning
Table 23 - Checks before Starting up the Unit
Important Information on the Refrigerant Used
Periodic Checks and Commissioning of Pressure Equipment
Dismission and Disposal

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1 Table of Contents
2 General Description
3 Mechanical Installation
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Air to water heat pump units with scroll compressors – split

version

EWYT~CZ(I/O)

Original Instructions

D-EIMHP01505-22_00EN 1/59

REV

Date

Supersedes

Installation and Maintenance Manual

D-EIMHP01505-22_00EN

31/05/2022

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Daikin EWYT040CZI-A1 Installation And Maintenance Manual

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