Related Manuals for Daikin EWYT021CZI-A1
Summary of Contents for Daikin EWYT021CZI-A1
- Page 1 Date 31/05/2022 Supersedes Installation and Maintenance Manual D-EIMHP01505-22_00EN Air to water heat pump units with scroll compressors – split version EWYT~CZ(I/O) Original Instructions D-EIMHP01505-22_00EN 1/59...
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Page 2: Table Of Contents
Contents 1. INTRODUCTION ................................5 1.1. Precautions against residual risks .......................... 5 1.2. General description..............................6 1.3. Information about the refrigerant ..........................7 1.4. Safety Devices General Description ........................7 1.5. Installation Site Requirements for the Indoor Unit ....................8 1.5.1. - Page 3 6.4. To connect the refrigerant piping to the indoor unit ....................36 6.5. Checking the refrigerant piping ..........................37 6.5.1. Pressure Leak Test ........................... 37 6.5.2. To perform vacuum drying ........................37 6.5.3. To insulate the refrigerant piping ....................... 38 6.6.
- Page 4 List of tables Table 1 – Physical properties of R32 refrigerant........................7 Table 2 – Space requirements: NOT Lowest Underground Floor..................9 Table 3 – Space requirements: Lowest Underground Floor ....................10 Table 4 – Temper Grade for piping material ........................21 Table 5 –...
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Page 5: Introduction
1. INTRODUCTION This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons. The appliance shall not be accessible to the general public: it must be installed in a safety area, protected from easy access. -
Page 6: General Description
32. During transport, always secure the unit to the bed of the vehicle to prevent it from moving about and overturning. 33. The machine must be transported according to the regulations in force considering the characteristics of the fluids in the machine and the description of these on the safety data sheet. 34. -
Page 7: Information About The Refrigerant
1.3. Information about the refrigerant This product contains R32 refrigerant that has a minimal environmental impact, thanks to its low value of Global Warming Potential (GWP). According to ISO 817, R32 refrigerant is classified as A2L, which is slightly flammable, since the flame propagation rate is low, and nontoxic. -
Page 8: Installation Site Requirements For The Indoor Unit
1.5. Installation Site Requirements for the Indoor Unit Also read the following requirements: ▪ General installation site requirements. See the “General safety precautions” chapter. ▪ Service space requirements. ▪ Refrigerant piping requirements (length, height difference). Local building codes and safety standards shall be followed; in absence of local codes and standards refer to EN 378 3 / ISO 5149-3 as a guide. -
Page 9: Table 2 - Space Requirements: Not Lowest Underground Floor
The indoor unit is provided with a leak detection system and an integrated emergency fan. 1.5.1.1. Toxicity Requirement (EN 378) With respect to the toxicity value, the maximum refrigerant quantity is evaluated through the following formula �� → �� = ���������������� ���������� �� �������� ������������ = 0,3 �� �� �� �� ��... -
Page 10: Table 3 - Space Requirements: Lowest Underground Floor
Flammability Requirement (IEC 60335-2-40) – Lowest Underground Floor 1.5.1.3. On the other hand, if the indoor unit is installed on the lowest underground floor, the maximum refrigerant quantity with respect to the flammability value shall be evaluated through the following formula: ��... -
Page 11: Countermeasures
Then, in these conditions, if: Not Lowest Underground Floor: • > 18 kg → Machinery Room (EN378 – 3) Required • < 18 kg → Ventilation (Natural or Forced) + Alarms (sound & light) Required 10,2 kg < M • <... - Page 12 1.5.2.3. Safety Alarms The safety alarm system shall warn both audibly and visibly, such as both a loud buzzer (15 dBA above the background level) and a flashing light. At least one safety alarm inside the occupied space shall be installed. For the occupancy listed below, the safety alarm system shall also warn at a supervised location, such as the night porter’s location, as well as the occupied space: •...
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Page 13: Receipt Of The Unit
Immediately report the damage to the manufacturer representative, a set of photographs would be helpful in recognizing responsibility. The restitution of the machinery is intended as ex-factory Daikin Applied Europe S.p.A. Daikin Applied Europe S.p.A. declines all responsibility for any damage that the machinery may suffer during transport to the destination. -
Page 14: Mechanical Installation
4. MECHANICAL INSTALLATION 4.1. Safety Before installation and commissioning of the machinery, the people involved in this activity must have acquired the information necessary to perform these tasks, applying all the information gathered in this manual. In particular: ▪ the unit must be firmly anchored to the ground when it must not be moved. ▪... -
Page 15: Lifting The Outdoor Dual Unit
4.2.2. Lifting the Outdoor DUAL unit Figure 2 – Lifting the outdoor DUAL unit 4.2.3. Lifting the INDOOR unit A forklift can only be used for transport as long as the unit remains on its pallet as shown above. Figure 3 – Indoor Unit Handling & LIFTING D-EIMHP01505-22_00EN 15/59... -
Page 16: Outdoor Unit Positioning And Assembly
4.3. Outdoor Unit Positioning and assembly All the outdoor units are designed for installation outdoors, either on balconies or on the ground, provided that the installation area is free of obstacles that could reduce air flow to the condensers coil. The unit must be installed on a robust and perfectly level foundation;... -
Page 17: Outdoor Unit Minimum Space Requirements
To fasten the unit to the floor, use M10 bolts. Before unit commissioning, the flatness must be verified by using a laser levelling device or other similar devices. The flatness shall not be over 5 mm for units within 7 m length. To ensure best performance on the installation site, the following precautions and instructions must be followed: ▪... -
Page 18: Indoor Unit Positioning And Assembly
NOTE: In case the calculated value of A and/or C is higher than 2000 mm, consider 2000 mm as minimum distance. If two units are installed in a free field side by side along their longer sides, A and C, the minimum recommended distance between them is 1000 mm;... -
Page 19: Additional Installation Site Requirements
▪ When the installation height of the unit needs to be increased, do NOT use stands to only support the corners. ▪ Stands under the unit must be at least 100 mm wide. There are two sides which can be mounted facing the wall. It is important to respect the minimum distances in any case. The unit must be fixed to prevent it from tilting. -
Page 20: Combining Units And Options
Combining Units and Options The outdoor and indoor model can be combined as indicated in the following table. Unit Compositions Size 21kW 1x EWYT021CZI-A1 + 1x EWYT021CZO-A1 Size 32kW 1x EWYT032CZI-A1 + 1x EWYT032CZO-A1 Size 40kW 1x EWYT040CZI-A1 + 1x EWYT040CZO-A1... -
Page 21: Figure 12 - Piping Scheme Indoor Unit - Outdoor Unit
Figure 12 – Piping scheme Indoor unit - Outdoor unit Piping dimensions Indoor Unit – Outdoor Unit INDOOR UNIT G = Gas Piping L = Liquid Piping EWYT021CZI-A1 Ø 28,6 mm Ø 9,52 mm EWYT032CZI-A1 Ø 28,6 mm Ø 12,7 mm EWYT040CZI-A1 Ø... -
Page 22: Noise And Sound Protection
Height difference between indoor and outdoor unit Table 7 – Piping length and height difference table If these maximum lengths and heights will not be respected, Daikin Applied Europe S.p.A. will not guarantee the correct functioning of the units. 4.8. -
Page 23: Water Piping
The flow switch is set up to intervene when the water flow of the BPHE reaches the minimum acceptable flow value (see the table below). Model Flow switch Setpoint [l/min] EWYT021CZI-A1 EWYT032CZI-A1 EWYT040CZI-A1 EWYT064CZI-A2 Table 9 – Flow Switch Setpoint 4.9.3. -
Page 24: Water Pressure Drops For Filters
The BPHE must not be exposed to flushing velocities or debris released during flushing. It is recommended that a suitably sized bypass and valve arrangement is installed to allow flushing of the piping system. The bypass can be used during maintenance to isolate the heat exchanger without disrupting flow to other units. -
Page 25: Operation Limits
Water flow range refer to pump only. For water flow limits of the unit refer to water flow section. Pump Curves Model Pump curve EWYT021CZI-A1 EWYT032CZI-A1 EWYT040CZI-A1 EWYT064CZI-A2 Table 11 – Pump curves associated with each unit size 4.13. -
Page 26: Operating Stability And Minimum Water Content In The System
OPERATION RANGE HEATING – EWYT-CZ EWYT021~064-CZ Figure 18 – Operating limits on EWYTCZ in heating mode Outside ambient temperature CLWT Condenser Leaving water temperature Ref. 1 Certain unit sizes might work in part load in this area The charts shown above constitute a guideline on operating limits in the range. Refer to the CSS selection software for the actual operating limits in the working conditions for each model. -
Page 27: Water Flow Limits
A water flow rate higher than the maximum value shown in Table 13 will result in an unacceptable load loss and excessive erosion of the pipes, with vibrations that can cause breakage. Unit flow limits MODEL Min flow [l/s] Max flow [l/s] EWYT021CZI-A1 0.84 1.90 EWYT032CZI-A1 1.01 2.66 EWYT040CZI-A1 1.01... -
Page 28: Figure 20 - Initial Expansion Vessel Pressure Based On Maximum Water Volume
Maximum water volume Refer to the graph below to determine the maximum water volume in order to calibrate the expansion vessel: Figure 20 – Initial expansion vessel pressure based on maximum water volume Circuit without glycol Default The default value for initial pressure, shown in the figure, refers to a difference in H of 7 metres. If the total water volume of the entire circuit exceeds the permitted maximum volume, another expansion vessel must be installed. -
Page 29: Electrical Installation
Provide an electrical circuit to connect the unit. It must be connected to the copper cables with an adequate section relative to the absorption values and according to the current electrical standards. Daikin Applied Europe S.p.A. declines all responsibility for an inadequate electrical connection. The connections to the terminals must be made with copper terminals and cables, otherwise overheating or corrosion may occur at the connection points with the risk of damaging the unit. -
Page 30: Maximum Cable Dimension
Model [A] EWYT021CZO-A1 EWYT032CZO-A1 EWYT040CZO-A1 EWYT064CZO-A2 Model Max cable size [mm^2] Model [A] EWYT021CZI-A1 6 (rigid) / 4 (flexible) EWYT032CZI-A1 6 (rigid) / 4 (flexible) EWYT040CZI-A1 6 (rigid) / 4 (flexible) EWYT064CZI-A2 6 (rigid) / 4 (flexible) 5.3.2. Safety device requirements The power supply must be protected with a Residual current device, as indicated in the table below. -
Page 31: Master Wiring Diagram
Where: = phase with greatest unbalance = average voltage Example: the three phases measure 383, 386 and 392 V respectively. The average is: 383 + 386 + 392 = 387 �� The unbalance percentage is: ( 392 − 387 ) ∗ 100 = ��. -
Page 32: Table 15 - Reference No. 1
SWITCH DISCONNECTOR – 3P+N (QSP) Unit Data supply voltage /current Current Size Main Switch (A) EWYT021CZ—A1 360 Vac /25,90 A EWYT032CZ—A1 360 Vac / 41,46 A D100 EWYT040CZ—A1 360 Vac / 45,90 A D100 EWYT064CZ—A1 360 Vac / 74,63 A D125 Table 15 –... -
Page 33: Connecting The Refrigerant Piping
6. CONNECTING THE REFRIGERANT PIPING Precautions when connecting the refrigerant piping RISK OF BURNING ▪ Avoid anything but the designated refrigerant to get mixed into the refrigerant cycle (e.g., air). ▪ Only use R32 when adding refrigerant. ▪ Only use installation tools (e.g., manifold gauge set) that are exclusively used for R32 installations to withstand the pressure and to prevent foreign materials (e.g., mineral oils and moisture) from mixing into the system. -
Page 34: Using The Ball Valve
Refrigerant piping Part to be brazed Taping Manual value Pressure-reducing valve Nitrogen Figure 22 – Pipe Brazing ▪ Do NOT use antioxidants when brazing pipe joints. Residue can clog pipes and break equipment. ▪ Do NOT use flux when brazing copper-to-copper refrigerant piping. Use phosphor copper brazing filler alloy (BCuP), which does not require any flux. -
Page 35: To Connect The Refrigerant Piping To The Outdoor Unit
6.3. To connect the refrigerant piping to the outdoor unit All field piping must be installed by a licensed refrigeration technician and must comply with the relevant local and national regulations. Before installing the refrigerant piping system, it is important to perform a leak test with the use of leak detection tools, especially in the surroundings of the ball valves. -
Page 36: To Connect The Refrigerant Piping To The Indoor Unit
Unit Connection Unit Connection UNIT Gas Piping Liquid Piping Gas Side Liquid Side EWYT021CZ(O/I)-A1 Ø 28,6 mm Ø 9,52 mm Ø 28,6 mm F Ø 12,7 mm F EWYT032CZ(O/I)-A1 Ø 28,6 mm Ø 12,7 mm Ø 28,6 mm F Ø 12,7 mm F EWYT040CZ(O/I)-A1 Ø... -
Page 37: Checking The Refrigerant Piping
Once completed, it is possible to perform a leak test and vacuum within the piping system (outdoor unit excluded, remember to keep the ball valves in CLOSED position during these phases, otherwise the refrigerant within the outdoor unit may leak) and the indoor unit. 6.5. -
Page 38: To Insulate The Refrigerant Piping
The first step in order to correctly perform a vacuum within the indoor unit + piping system requires to make sure that the expansion valve inside the indoor unit is fully open. To open the valve, it is necessary to have already electrically installed the unit, and to turn it on. -
Page 39: Precautions When Charging Refrigerant
6.6.1. Precautions when charging refrigerant ▪ Only use R32 as refrigerant. Other substances may cause explosions and accidents. ▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. DO NOT vent these gases into the atmosphere. ▪... -
Page 40: Pre-Charging Refrigerant
6.6.3. Pre-charging refrigerant Calculate the additional amount of refrigerant to be added using the formula mentioned in “6.6 To determine the additional refrigerant amount”. The outdoor units will be shipped with an initial amount of charge (pre-charge) which differs for each unit. Once installed, the technician shall add the extra quantity based on the formula above mentioned. -
Page 41: Checks After Charging Refrigerant
6.6.4. Checks after charging refrigerant ▪ Are all ball valves open? ▪ Is the amount of refrigerant, that has been added, recorded on the refrigerant charge label? Make sure to open all stop valves before operating. Operating with the stop valves closed will damage the compressor. To fix the fluorinated greenhouse gases label Fill in the label as follows: A: total refrigerant charge added... -
Page 42: Operator's Reponsibilities
7. OPERATOR’S REPONSIBILITIES It is essential that the operator is appropriately trained and becomes familiar with the system before operating the unit. In addition to reading this manual, the operator must study the microprocessor operating manual and the wiring diagram to learn the start-up sequence, unit operation, the shutdown sequence and the operation of all the safety devices. -
Page 43: Maintenance
8. MAINTENANCE Personnel working on the electrical or the refrigeration components must be authorized, trained and fully qualified. Maintenance and repair requiring the assistance of other skilled personnel should be carried out under the supervision of the person competent in the use of flammable refrigerants. Any person conducting servicing or maintenance on a system or associated parts of the equipment should be competent according to EN 13313. -
Page 44: Pressure / Temperature Table
8.1. Pressure / temperature table °C °C °C °C 2.97 7.62 16.45 31.41 3.22 8.13 17.35 32.89 3.48 8.67 18.30 34.42 3.76 9.23 19.28 36.00 4.06 9.81 20.29 37.64 4.37 10.43 21.35 39.33 4.71 11.07 22.45 41.09 5.06 11.74 23.60 42.91 5.43 12.45... -
Page 45: Table 20 - Standard Routine Maintenance Plan
Yearly/ Monthly List of Activities Weekly Seasonal (Note 1) (Note 2) General: Reading of operating data (Note 3) Visual inspection of unit for any damage and/or loosening Verification of thermal insulation integrity Cleaning Paint where necessary Analysis of water (4) Check of flow switch operation Electrical Installation: Verification of control sequence... -
Page 46: Air Heat Exchanger Maintenance
Yearly/ Monthly List of Activities (Note 8) Weekly Seasonal (Note 1) (Note 2) General: Reading of operating data (Note 3) Visual inspection of unit for any damage and/or loosening Verification of thermal insulation integrity Cleaning Paint where necessary Analysis of water (4) Check of flow switch operation Electrical Installation: Verification of control sequence... -
Page 47: Electrical Installation
Galvanic corrosion of the Copper/Aluminium connection can occur in corrosive atmosphere under the plastic protection; during the maintenance operations or periodic cleaning, check the aspect of the plastic protection of the copper/aluminium connection. If it is inflated, damaged, or removed contact the manufacturer representative for advice and information. 8.2.2. -
Page 48: Refrigerant Circuit Scheme
9. REFRIGERANT CIRCUIT SCHEME Figure 24 – Refrigerant circuit (P&ID) diagram for MONO circuit EWYT~CZ unit D-EIMHP01505-22_00EN 48/59... - Page 49 EQUIPMENT DESCRIPTION SCROLL COMPRESSOR 4 WAY VALVE TUBES&FINS HEAT EXCHANGER (COIL) BIFLUX FILTER MECHANICAL FILTER ELECTRONIC EXPANSION VALVE LIQUID RECEIVER HEAT EXCHANGER (BPHE) CHECK VALVE SUBCOOLER (BPHE) ACCESS FITTING (¼” SAE FLARE) SHUT-OFF VALVE RECEIVER VALVE ¼” x ¼” DRIER FILTER COPPER PIPE CAP Crankcase heater LINE...
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Page 50: Figure 25 - Water Circuit P&Id For Ewyt-Cz Units
WATER CIRCUIT EQUIPMENT PUMP DRAIN PLUGGED FITTING SAFETY VALVE 3 BAR ½” SHUT OFF VALVE AIR VENT EXPANSION VESSEL AIR FILTER TEMPERATURE SENSOR PRESSURE GAUGE FLOWSWITCH Figure 25 – Water Circuit P&ID for EWYT-CZ Units D-EIMHP01505-22_00EN 50/59... -
Page 51: Figure 26 - Refrigerant Circuit (P&Id) Diagram For Dual Circuit Ewyt~Cz Outdoor Unit
Figure 26 – Refrigerant circuit (P&ID) diagram for DUAL circuit EWYT~CZ outdoor unit D-EIMHP01505-22_00EN 51/59... -
Page 52: Figure 27 - Refrigerant Circuit (P&Id) Diagram For Dual Circuit Ewyt~Cz Indoor Unit
Figure 27 – Refrigerant circuit (P&ID) diagram for DUAL circuit EWYT~CZ indoor unit REFRIGERANT PED GROUP LINE (bar) (°C) HIGH PRESSURE GAS 42.9 +10/+120 HIGH PRESSURE LIQ 42.9 -10/+65 LOW PRESSURE -30/+60 D-EIMHP01505-22_00EN 52/59... -
Page 53: List Of The Labels Applied To The Units
10. LIST OF THE LABELS APPLIED TO THE UNITS Labels Label Number Description Location On the electric panel Hazardous voltage warning (outside) On the electric panel A2L symbol (outside) On the electric panel Manufacturer’s logo (outside) One on the unit frame and Lifting instruction* one on the packaging One on the unit panel near... -
Page 54: Figure 28 - Labels On The Outdoor Unit
Figure 28 – Labels on the outdoor unit Figure 29 – Labels on the indoor unit D-EIMHP01505-22_00EN 54/59... -
Page 55: Figure 30 - Labels On The Indoor Unit - Electric Panel Side
Figure 30 – Labels on the indoor unit – Electric panel side D-EIMHP01505-22_00EN 55/59... -
Page 56: Commissioning
A minimum system load of 60% of machine capacity is available for testing and adjusting controls Table 23 – Checks before starting up the unit This list must be completed and sent to the local Daikin Service department at least two weeks before the start-up date. -
Page 57: Important Information On The Refrigerant Used
12. IMPORTANT INFORMATION ON THE REFRIGERANT USED This product contains fluorinated greenhouse gases. Do not vent gases into the atmosphere. Refrigerant type: GWP Value (global warming potential): The refrigerant system is charged with fluorinated greenhouse gases and the refrigerant charge is impressed on the plate. In Europe, the greenhouse gas emissions of the total amount of refrigerant in the system (expressed in equivalent tonnes of CO ) is used to determine the frequency of maintenance. - Page 58 Notes...
- Page 59 The present publication is drawn up only for technical support and it does not constitute a binding commitment for Daikin Applied Europe S.p.A. Its content has been written by Daikin Applied Europe S.p.A. to the best of its knowledge. No explicit or implie d warranty is given for the completeness, accuracy, reliability of its contents.