MAXA HWA1-A Installer Manual
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MAXA HWA1-A Installer Manual

MAXA HWA1-A Installer Manual

Chillers and air/water heat pumps with axial fans
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  • Page 2 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Changes of SEER values and HWA1-A chiller performance after unit revision for E.M. A.R. ErP 2021, updated heat pump refrigerant charges, modified coil treatments and 11-2020 KA accessory E.M.

  • Page 3: Table Of Contents

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans INDEX PURPOSES AND CONTENTS OF THE MANUAL ......................... 5 CONSERVATION OF THE MANUAL ............................5 GRAPHIC SYMBOLS................................. 5 SAFETY LAWS ..................................5 PERMITTED USES ................................... 5 GENERAL SAFETY GUIDELINES ..............................6 WORKERS’...
  • Page 4 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 13.2 CHILLED WATER PRODUCTION (SUMMER OPERATION) ...................... 52 13.3 HOT WATER PRODUCTION (WINTER OPERATION)....................... 52 13.4 AMBIENT TEMPERATURE OPERATING LIMITS AND RECAPITULATIVE TABLE ............... 52 USER – ONBOARD CONTROLLER INTERFACE ........................54 14.1...

  • Page 5: Purposes And Contents Of The Manual

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans The manual of HWA1-A/HWA1-H units describes all the necessary information concerning the better use of the appliance under the operator’s safety conditions meeting with the requirements listed in the 2006/42/CE Equipment Directive and following amendments.

  • Page 6: General Safety Guidelines

    4 GENERAL SAFETY GUIDELINES Before beginning to operate on HWA1-A/HWA1-H units every user has to be perfectly knowledgeable about the functions of the equipment and its controls and has to have read and understood the information listed in this manual.

  • Page 7: Refrigerant Safety Data Sheet

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans REFRIGERANT SAFETY DATA SHEET Name: R410A (50% Difluoromethane (R32); 50% Pentafluoroethane (R125). RISKS INDICATIONS Major risks: Asphyxia Specific risks: The rapid evaporation may cause freezing. FIRST AID General information: Never give anything by mouth to an unconscious person.

  • Page 8: Available Sizes, Versions And Accessories

     nr. 4 fixed digits, different depending on the number of mounted fans and on the type of unit (heat pump or chiller): 2 fans – the digit 0127 stands for HWA1-A and the digit 0227 stands for HWA1-A/H. 3 fans – the digit 0137 stands for HWA1-A and the digit 0237 stands for HWA1-A/H 4 fans –...
  • Page 9 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans FATHER CODE Variant type 0127#(RV)(PCF)(TA)(CI1) Special tightening Standard tightening Integrated tank kit Special mechanical tightening for glycol> 40% (*) Electrical variants 2 Antifreeze kit 0 Without Electrical variants With integrated...
  • Page 10 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans FATHER CODE Variant type 0127#(RV)(PCF)(TA)(CI1)(TE)(KS)(KA)(EL)(EL2) Refrigeration variants Silencing Treatment Accessory 1 Accessory 2 Without Taps on compressors’ discharge and suction lines Double relief valve Taps on compressors’ discharge and...
  • Page 11 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans HWA1-A/H MAIN CODE Type of variant 0227# Refrig-Rooftop-Condensing Heating/cooling power /H reversible heat pump 109 kW 121 kW 142 kW 148 kW Water pipes configuration 160 kW Pump configuration...
  • Page 12 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans MAIN CODE Type of variant 0127#(RV)(PCF)(TA)(CI1) Special seal Integrated tank kit Antifreeze kit None Special mechanical seal for Electrical variants glycol >40% (*) Electrical variants 2 None With integrated Technical...
  • Page 13 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans MAIN CODE Type of variant 0127#(RV)(PCF)(TA)(CI1)(TE)(KS)(KA)(EL)(EL2) Refrigerant variants Silencing 0 None Valves on compressor Treatment delivery and intake lines 2 Double safety valve Accessory 1 Valves on delivery and...

  • Page 14: Installation

    WARNING: The HWA1-A/HWA1-H units are designed for outdoor installation and for places not directly accessible to unqualified personnel. The place of installation must be entirely far away from fire risk. All the necessary measures should be adopted in order to prevent the fire risk in the place of installation.

  • Page 15: Location And Minimum Technical Clearances

    LOCATION AND MINIMUM TECHNICAL CLEARANCES The HWA1-A and HWA1-H models are all designed for outdoor installations; any covering over the unit or locating near trees (even if they partially cover the unit) should be avoided in order to allow the air recirculation. It is advisable to realize a supporting basement, with adequate size similar to unit foot-print.

  • Page 16: Dimensions

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans MODEL [mm] [mm] [mm] [mm] HWA1-A 02106-04349 1000 1000 1000 HWA1-A/H 02109-04345 1000 1000 1000 Installation, maintenance and operation minimum technical clearances DIMENSIONS The dimensions of the standard and super silent (SSL) versions are reported in the below tables.

  • Page 17: Barycentre And Dampers Location

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Height [mm] Max Height Model Length A With B Height C Max Height Versions “SSL” Versions “SSL” or “C” HWA1-A/H [mm] [mm] [mm] Packing [mm] and “C” Packing [mm]...
  • Page 18 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Standard 1960 1970 1151 1118 04239 2200 2860 /PDAP/SI 2300 2840 1386 1168 Standard 1960 1980 1148 1102 04258 2200 2860 /PDAP/SI 2310 2840 1402 1165 Standard 2670 2690...
  • Page 19 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans The ideal installation positions of the dampers for each type of machine are shown in the below images. HWA1-A/H 2 fans: 02109, 02121 HWA1-A/H 3 fans: 02142, 02148, 02160...
  • Page 20 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans HWA1-A/H 6 FANS: 04273, 04304, 04345 HWA1-A 2 FANS: 02106, 02120, 02128 HWA1-A 3 fans: 02140, 04155, 04177, 04184...
  • Page 21 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans HWA1-A 4 fans: 04209, 04239, 04258 HWA1-A 6 fans: 04305, 04349...

  • Page 22: Hydraulic Connections

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans HYDRAULIC CONNECTIONS The hydraulic connections have to be installed in accordance with national and/or local regulations; the pipes can be made up of steel. The pipes have to be accurately sized as a function on the nominal water flow of the unit and on the hydraulic pressure drops of the hydraulic circuit.

  • Page 23: Characteristics Of Water Of The Plant Circuit

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 6.6.1 Characteristics of water of the plant circuit To ensure the correct operation of the unit, the water should be adequately filtred (see what is reported at the beginning of this paragraph) and that the amounts of dissolved substances should minimal.
  • Page 24 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Coupled primary and secondary circuits — common pumps for chiller units User User User User Delivery Return Pumps of the chillers (constant water flow Since the primary and secondary circuits are not divided, the flow rate of the pumps must be dimensioned on the sum of the design flow rates of the whole terminals without regarding the contemporaneity.
  • Page 25 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Uncoupled primary and secondary circuits— single pump for chiller units and a proper pump for secondary chiller units The diagram is suitable for the same refrigeration units also the flow rate can be constant or variable or the users.
  • Page 26 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Domestic hot water production with total or partial heat recovery chillers With the use of desuperheaters, it is possible to increase the temperature of the domestic hot water. The SC heat exchanger prevents encrustations caused by the deposited scale on the heat exchanger of the refrigeration unit and must always be provided.
  • Page 27 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Thermo-refrigerating unit for mixed air conditioning systems with primary air plus radiant panels or chilled beams — plant with chilling reversible heat pump units The heat generators feed the high temperature circuits of the heating and sanitary hot water production systems.

  • Page 28: Handbook

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Thermo-refrigerating unit for mixed air conditioning systems with primary air plus radiant panels or chilled beams — plant with chiller reversible heat pump units The heat generators work to integrate existing renewable sources and any post-heating elements if necessary.
  • Page 29 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans EXCH Plate heat exchanger Storage tank Differential pressure switch Air vent valve Temperature sensor Expansion vessel Pump Manometer Discharge valve Flow switch Shut-off valve Water filter Relief valve H/CR User’s water inlet...

  • Page 30: Drainage System

    6.6.5 Drainage system The HWA1-A/HWA1-H units all of them adopt drainage holes on the basement for the condensate draining which can leach from the pipes of hydraulic and refrigerant circuits, and to discharge the generated water during defrosting cycles.

  • Page 31: Plant Unlaoding

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans You can use the service valve, when it is necessary to refill the plant or adapt the concentration of glycol. Unscrew the plug (cap) of the service valve and connect to the hose a pipe of 14 mm (inner diameter) connected to the water network, and then fill the system by unscrewing the knurled nut.

  • Page 32: Refrigerat Circuits

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans REFRIGERAT CIRCUITS Herein below are reported the conceptual diagrams of chillers and heat pumps. Refrigerant circuit of HWA1-A/H heat pump units Refrigerant circuit of HWA1-A chiller units Electronic expansion valve for...

  • Page 33: Electric Connections

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 6.8 ELECTRIC CONNECTIONS 6.8.1 Access to electrical panel The steps for getting access to the electrical panel are detailed below: 1. Turn the disconnector switch to break the voltage 2.
  • Page 34 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans HWA1-A TERMINAL CONNECTION TYPE Connect the grounding wire Connect L1 phase cable coming from the mains Power supply input 3-Ph+PE, 400 Vac, 50Hz. Connect L2 phase cable coming from the mains Connect L3 phase cable coming from the mains XU-1.1...

  • Page 35: Start Up

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 7 START UP Before start-up: • Check out the availability of the supplied wiring diagrams and manuals of the installed appliance. Check out the availability of the electrical and hydraulic diagrams of the plant in which the unit is installed.

  • Page 36: Shutdowns For Long Periods

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans It is recommended to keep track of assistance operations that are executed on the unit; this will make easy searching any troubleshooting. In case breakdown or malfunction situations: •...

  • Page 37: Operation

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans It is a good rule to carry out periodic checks in order to verify the proper operation of the unit: Recommended routine control periods. OPERATION 1 month 4 month 6 month 12 month...

  • Page 38: Cleaning Finned Coils Treated With The Anti-Corrosion Method

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 10.1.1 Cleaning finned coils treated with the anti-corrosion method The anti-corrosion treatment applied to the finned coils (available as an alternative to the standard coils) guarantees protection against aggressive atmospheres.

  • Page 39: Residual Risks

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 11.1 RESIDUAL RISKS We point out the most common situations that could give rise to risks for persons or things. The manufacturer can not control what is illustrated above.
  • Page 40 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans • Coming in contact with the transmission or extraction of the fans this can cause injury. Before getting access to the unit or removing the protection grilles or the fans themselves, open the disconnecting switch located on the connection line of the unit, padlock it and attach on it the appropriate warning sign.

  • Page 41: Technical Data

    12 TECHNICAL DATA 12.1 COOLING ONLY VERSION “HWA1-A” Model HWA1-A TECHNICAL CHARACTERISTICS Unit 02106 02120 02128 02140 04155 04177 04184 04209 04239 04258 04305 04349 Cooling capacity 105,0 118,7 129,5 139,3 155,0 175,9 182,4 207,9 238,1 256,6 304,8 347,7 Total power...
  • Page 42 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans circuits Type R410A Refrigerant charge (Circuit 10,5 10,5 10,5 13,0 13,0 13,0 13,0 13,5 13,5 19,5 20,0 1) (4) Refrigerant Refrigerant charge (Circuit 10,5 10,5 10,5 13,0 13,5 13,5...
  • Page 43 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 54 std/ 54 std/ 55 std/ 54,9 std/ 54,9 std/ 55,9 std/ 55,9 std/ 55,9 std/ 55,9 std/ 55,9 std/ 55,8 std/ 57,8 std/ 53 SL/ 53 SL/ 54 SL/...

  • Page 44: Heat Pump Standard Version

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 12.2 HEAT PUMP STANDARD VERSION Model HWA1-A/H Unit TECHNICAL CHARACTERISTICS 02109 02121 02142 02148 02160 04176 04199 04215 04237 04273 04304 04345 Cooling capacity 102,8 113,1 131,8 137,9 148,1...
  • Page 45 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Type SCROLL Refrigerant oil Emkarate RL 32 3MAF (type) Number Capacity steps Compressor Oil charge 4,44+4,44 4,44+4,44 4,44+4,44 6,3 + 4,44 6,3 + 4,44 3,25+3,25 4,44+3,25 4,44+4,44 4,44+4,44 6,3 + 4,44...
  • Page 46 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Max pressure on water side Max pressure on hydronic kit side (relief valve Hydraulic circuit calibration) Water 2" 1/2 2" 1/2 2" 1/2 2" 1/2 2" 1/2 3" 3"...
  • Page 47 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Operating conditions: (1) Internal heat-exchanger water temperature = 12/7 ° C, external heat exchanger air intake temperature 35°C. (2) Internal heat exchanger water temperature = 23/18°C, external heat-exchanger air intake temperature 35°C.

  • Page 48: Sound Levels

    UNI EN ISO 9614-2 standard, respecting the Eurovent certification requirements, which provides a tolerance of 3dB(A) on the total sound power level (the only data item to be considered certified). The sound pressure values are calculated from the sound power level using ISO 3744: 2010, both for standard machines and for those with installed SL and SSL accessories. Model HWA1-A Versions Sound power level [LW(A)]...

  • Page 49: Electrical Data Of The Units And Auxiliary Elements

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Model HWA1-A/H Versions Sound power level [LW(A)] Sound pressure level at 1 m Sound pressure level at 10 m Standard 69,6 02109, 02121 68,6 65,6 Standard 55,9 02142, 02148,...
  • Page 50 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans Model HWA1-A Greatness Unit 02106 02120 02128 02140 04155 04177 04184 04209 04239 04258 04305 04349 F.L.A. Input current input at the maximum allowable conditions F.L.A. Compressor 1 38,2...

  • Page 51: Operating Limits

    HWA1-A & HWA1-H Chillers and Air/Water heat pumps with axial fans 13 OPERATING LIMITS 13.1 EVAPORATOR WATER FLOW RATE The nominal water flow rate is referred to a ∆T=5°C, between the evaporator’s inlet and outlet temperatures. The allowed maximum water flow rate is that corresponding to ∆T=3°C. Higher values may produce too high pressure drops. The allowed minimum water flow rate is that corresponding to ∆T=8°C.

  • Page 52: Chilled Water Production (Summer Operation)

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 13.2 CHILLED WATER PRODUCTION (SUMMER OPERATION) The minimum temperature that is allowed of the user exchanger outlet is 4°C: for lowest temperatures the BT version units which guarantees the operation of the outgoing water temperatures down to -8°C. In case of lower outdoor temperatures, please contact our company for the feasibility study and evaluation of changes to be made according to your needs.
  • Page 53 HWA1-A & HWA1-H Chillers and Air/Water heat pumps with axial fans Partial load Partial load HWA1-A Partial l oad HWA1-A BT...

  • Page 54: User - Onboard Controller Interface

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 14 USER – ONBOARD CONTROLLER INTERFACE The unit is equipped with the display seen below having a transparent polycarbonate hinged door and its protection rating is IP67. The interface consists of a variable text part and a series of icons identifying the operation of the unit as shown in the table below.

  • Page 55: Other Conditions

    HWA1-A & HWA1-H Chillers and Air/Water heat pumps with axial fans LIVEL OF MENU LABEL OTHER CONDITIONS PASSWORD Setpoint User Sensor Installer Alarms User Only in case of active alarms Digital inputs Installer Parameters Installer Password User Operating Installer hours...

  • Page 56: Alatms' Menu (Err)

    HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans 14.3 ALATMS’ MENU (Err) In this menu shows only the active alarms. All active alarms can be displayed. If the unit is composed of multi-circuits, then the alarms are divided by circuit (the ALCx label gives access to the alarms of circuit number x).

  • Page 57: Important Information

    HWA1-A & HWA1-H Chillers and Air/Water heat pumps with axial fans 16 IMPORTANT INFORMATION IT IS FORBIDDEN • To remove and/or tamper with any safety device. • To touch the appliance when barefoot or parts of the body are wet or damp.
  • Page 58 HWA1-A & HWA1-H Air/Water chillers and heat pumps with axial fans...
  • Page 59 HWA1-A & HWA1-H Chillers and Air/Water heat pumps with axial fans...
  • Page 60 ADVANTIX SpA Via S. Giuseppe Lavoratore 24, 37040 Arcole (VR) Italy Tel. (+39).045.76.36.585 E-mail: info@advantixspa.it www.maxa.it...

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