Name: Daikin EWYT040CZI-A1
Brand: Daikin
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D-EIMHP01505-22_00EN 1/59

REV

Date

31/05/2022

Supersedes

Air to water heat pump units with scroll compressors – split

version

EWYT~CZ(I/O)

Original Instructions

Installation and Maintenance Manual

D-EIMHP01505-22_00EN

Table of Contents2
Introduction5
Precautions against Residual Risks5
General Description6
Information about the Refrigerant7
Safety Devices General Description7
Table 1 - Physical Properties of R32 Refrigerant7
Installation Site Requirements for the Indoor Unit8
Installation Room Area Requirements8
Table 2 - Space Requirements: NOT Lowest Underground Floor9
Table 3 - Space Requirements: Lowest Underground Floor10
Countermeasures11
Receipt of the Unit13
Storage13
Mechanical Installation14
Safety14
Handling and Lifting14
Lifting the Outdoor MONO Unit14
Figure 1 - Lifting the Outdoor MONO Unit14
Lifting the Outdoor DUAL Unit15
Lifting the INDOOR Unit15
Figure 2 - Lifting the Outdoor DUAL Unit15
Figure 3 - Indoor Unit Handling & LIFTING15
Outdoor Unit Positioning and Assembly16
Figure 4 - MONO Unit Positioning16
Figure 5 - DUAL Unit Positioning16
Figure 6 - Mounting Holes Location (Bottom View)16
Outdoor Unit Minimum Space Requirements17
Figure 7 - DUAL Unit17
Indoor Unit Positioning and Assembly18
Figure 8 - Units Installed Side by Side Along Their Shorter Sides, B or D18
Figure 9 - Units Installed Side by Side Along Their Longer Sides (Case 1 and Case 2)18
Additional Installation Site Requirements19
Figure 10 - Indoor Unit Minimum Space Requirements19
Combining Units and Options20
Preparing Refrigerant Piping20
Figure 11 - Seaside Installation of the Outdoor Unit20
Figure 12 - Piping Scheme Indoor Unit - Outdoor Unit21
Table 4 - Temper Grade for Piping Material21
Table 5 - Pipe Thickness for R3221
Table 6 - Piping Diameters Table21
Noise and Sound Protection22
Water Circuit for Connection with the Unit22
Figure 13 - Hydraulic Diagram22
Figure 14 - Hydraulic Elements22
Table 7 - Piping Length and Height Difference Table22
Water Piping23
Flow Switch23
Repairing and Checking the Water Circuit Connection23
Water Pressure23
Water Treatment23
Table 8 - Water Piping Diameters23
Table 9 - Flow Switch Setpoint23
Water Pressure Drops for Filters24
Indoor Unit Pump24
Figure 15 - Water Filter Pressure Drops24
Table 10 - Acceptable Water Quality Limits24
Operation Limits25
Figure 16 - External Pressure Head of Water Pump25
Figure 17 - Operating Limits on EWYT_CZ in Cooling Mode25
Table 11 - Pump Curves Associated with each Unit Size25
Operating Stability and Minimum Water Content in the System26
Figure 18 - Operating Limits on EWYTCZ in Heating Mode26
Table 12 - Minimum Water Content in the System26
Water Flow Limits27
Calibrating the Expansion Vessel27
Figure 19 - Minimum Water Volume Correction Factor27
Table 13 - Operating Limits27
Figure 20 - Initial Expansion Vessel Pressure Based on Maximum Water Volume28
Electrical Installation29
General Specifications29
Electric Connections29
Cable Requirements29
Maximum Cable Dimension30
Safety Device Requirements30
Phase Unbalance30
Table 14 - Table 1 of EN602041 Point 5.230
Master Wiring Diagram31
Figure 21 - Master Wiring Diagram31
Table 15 - Reference No. 132
Table 16 - Reference No. 232
Table 17 - Reference No. 332
Connecting the Refrigerant Piping33
To Braze the Pipe End33
Using the Ball Valve34
Figure 22 - Pipe Brazing34
Figure 23 - Ball-Valve34
To Connect the Refrigerant Piping to the Outdoor Unit35
To Connect the Refrigerant Piping to the Indoor Unit36
Checking the Refrigerant Piping37
Pressure Leak Test37
To Perform Vacuum Drying37
To Insulate the Refrigerant Piping38
Charging Refrigerant38
Precautions When Charging Refrigerant39
To Determine the Additional Refrigerant Amount39
Pre-Charging Refrigerant40
Checks after Charging Refrigerant41
Operator's Reponsibilities42
Maintenance43
Pressure / Temperature Table44
Routine Maintenance44
Table 18 - R32 Pressure/Temperature44
Table 19 - Yearly Maintenance Checklist for the Indoor Unit44
Table 20 - Standard Routine Maintenance Plan45
Air Heat Exchanger Maintenance46
Table 21 - Routine Maintenance Plan for Critical Application And/Or Highly Aggressive Environment46
Electrical Installation47
Service and Limited Warranty47
Refrigerant Circuit Scheme48
Figure 24 - Refrigerant Circuit (P&ID) Diagram for MONO Circuit EWYT~CZ Unit48
Figure 25 - Water Circuit P&ID for EWYT-CZ Units50
Figure 26 - Refrigerant Circuit (P&ID) Diagram for DUAL Circuit EWYT~CZ Outdoor Unit51
Figure 27 - Refrigerant Circuit (P&ID) Diagram for DUAL Circuit EWYT~CZ Indoor Unit52
List of the Labels Applied to the Units53
Table 22 - Labels Applied to the Unit53
Figure 28 - Labels on the Outdoor Unit54
Figure 29 - Labels on the Indoor Unit54
Figure 30 - Labels on the Indoor Unit - Electric Panel Side55
Commissioning56
Table 23 - Checks before Starting up the Unit56
Important Information on the Refrigerant Used57
Periodic Checks and Commissioning of Pressure Equipment57
Dismission and Disposal57

Brand	Daikin
Model	EWYT040CZI-A1
Category	Heat Pump
Language	English

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