Daikin EWAT016CZN-A1 Installation, Maintenance And Operation Manual Download Page 24 | Manualshive

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DEIMHP0140521_00EN

24

EWYT~CZ / EWAT~CZ

Figure 19 –

Refrigerant circuit (P&ID) diagram for DUAL circuit EWYT~CZ unit

REFRIGERANT

PED

GROUP

LINE

PS

(bar)

Ts

(°C)

R32

1

HIGH PRESSURE GAS

42,9

+10/+120

HIGH PRESSURE LIQ

42,9

10/+65

LOW PRESSURE

30

30/+60

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Summary of Contents for EWAT016CZN-A1

Page 1: ...REV 00 Date 04 2021 Supersedes Installation Maintenance and Operation Manual DEIMHP0140521_00EN Air to water heat pump units with scroll compressors EWYT CZ EWAT CZ...

Page 2: ......

Page 3: ...RESSURE EQUIPMENT 27 12 DISMISSIONAND DISPOSAL 27 List of tables Table 1 Physical properties of R32 refrigerant 5 Table 2 Minimum glycol percentage for low ambient air temperature 11 Table 3 Flow Swit...

Page 4: ...to check possible refrigerant leaks 13 Disable the unit from the mains using the main switch before opening the control panel 14 Check that the unit has been grounded correctly before starting it 15...

Page 5: ...pagation rate is low and nontoxic R32 refrigerant can burn slowly when all the following conditions are present The concentration is between the lower and upper flammability limit LFL UFL Wind velocit...

Page 6: ...it contacts the duct material n Airflow of the emergency mechanical ventilation shall be at least V 0 014 m Where V is air flow in m s m is the amount of refrigerant present in the machine room in kg...

Page 7: ...osphere may damage electrical components 4 MECHANICAL INSTALLATION 4 1 Safety Before installation and commissioning of the machinery the people involved in this activity must have acquired the informa...

Page 8: ...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 per...

Page 9: ...y side of the unit must be accessible for postinstallation maintenance operations and vertical air discharge must not be obstructed Figure below shows the minimum space required Figure 4 DUAL unit Whe...

Page 10: ...the main wind direction Frontal wind will disturb the operation of the unit If necessary use a screen to block the wind Ensure that water cannot cause any damage to the location by adding water drains...

Page 11: ...ition The water filter must be installed as close as possible to the unit If the water filter is installed in another part of the water system the Installer must guarantee the cleaning of the water pi...

Page 12: ...Z P H A2 2 43 6 00 Table 4 Operating limits 4 7 3 Preparing and checking the water circuit connection The units have water inputs and outputs for connecting the heat pump to water circuit of the syste...

Page 13: ...300 CO2 Sulphate ion mg SO4 2 l 100 Alkalinity mg CaCO3 l 200 Total Hardness mg CaCO3 l 75 150 Iron mg Fe l 0 2 Ammonium ion mg NH4 l 0 5 Silica mg SiO2 l Chlorine molecular mg Cl2 l 0 5 Note 1 Heat P...

Page 14: ...ater temperature Ref 1 Unit operations in this area require OP 192 HIGH AMBIENT TEMPERATURE KIT Ref 2 Unit operations in this area require the enabling of the Brine version in the controller and the u...

Page 15: ...t to have a water temperature difference of 2 5 K which allows it to operate with the minimum volume mentioned in the previous table However if a smaller temperature differential is set as in the case...

Page 16: ...appropriate antifreeze protection is always maintained Failing to follow the instructions above could result in unit damage 4 ELECTRIC HEATER Option on request A heater tape is instal led on the water...

Page 17: ...d the earth according to IEC 614391 table 1 and 2 and to the local national laws The cables connected to the main switch must be tightened using a pair of keys and respecting the unified clamping valu...

Page 18: ...ompressors must be carried out exclusively by qualified personnel Sharp edges and the surface of the condenser section could cause injury Avoid direct contact and use adequate pro tection device Do no...

Page 19: ...t maintenance could degrade all parts of the units coils compressors frames pipes etc with negative effect on performances and functionality There are two different levels of maintenance which can be...

Page 20: ...trical problem has been solved 4 No safety device either mechanical electrical or electronic must be disabled or overridden 5 The water used for filling the water circuit must be clean and sui tably t...

Page 21: ...X Check the safety valve X Coil section Checking the cleaning of the air heat exchanger Note 6 X Check the cleaning of water heat exchangers Note 6 X Verify that fans are well tightened X Verify coil...

Page 22: ...CZ 7 2 4 Refrigerant circuit scheme Figure 17 Refrigerant circuit P ID diagram for MONO circuit EWYT CZ unit REFRIGERANT PED GROUP LINE PS bar Ts C R32 1 HIGH PRESSURE GAS 42 9 10 120 HIGH PRESSURE LI...

Page 23: ...IMHP0140521_00EN 23 Figure 18 Refrigerant circuit P ID diagram for MONO circuit EWAT CZ unit REFRIGERANT PED GROUP LINE PS bar Ts C R32 1 HIGH PRESSURE GAS 42 9 10 120 HIGH PRESSURE LIQ 42 9 10 65 LOW...

Page 24: ...24 EWYT CZ EWAT CZ Figure 19 Refrigerant circuit P ID diagram for DUAL circuit EWYT CZ unit REFRIGERANT PED GROUP LINE PS bar Ts C R32 1 HIGH PRESSURE GAS 42 9 10 120 HIGH PRESSURE LIQ 42 9 10 65 LOW...

Page 25: ...nd outlet are indicative Please refer to the machine dimensional diagrams for exact water connections The series is composed by mono one circuit and dual two circuits reversible unit Legend Item Descr...

Page 26: ...raulic circuit Check the oil level in the compressors Chilled Water Yes No N A Piping complete Water System filled and vented Pumps installed operational rotation checked Strainers installed and clean...

Page 27: ...nd III of the classification established by the European Directive 2014 68 EU PED For units belonging to these categories some local regulations require a periodic inspection by an authorized person P...

Page 28: ...Notes...

Page 29: ...y is given for the completeness accuracy reliability of its contents All data and specifications contained therein may be subject to change without notice Refer to the data communicated at the time of...

Page 30: ...DEIMHP0140720_00EN 2021 04 Via Piani di Santa Maria 72 00072 Ariccia Roma Italy Tel 39 06 93 73 11 Fax 39 06 93 74 014 http www daikinapplied eu...

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