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AIR/WATER CHILLERS AND HEAT PUMPS
WITH AXIAL FANS
CONTROLLER MANUAL
Models
HWA1-A / HWA1-H 0140
HWA1-A / HWA1-H 0147
HWA1-A / HWA1-H 0260
HWA1-A / HWA1-H 0272
HWA1-A / HWA1-H 0285
This manual has been created for informative purpose. The company declines any responsibility for the results of any projecting or any installation based on the explanations and/or on
the technical specifications provided in this manual. It is besides forbidden the reproduction under any form of the texts and of the figures contained in this manual.
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Related Manuals for MAXA HWA1-A 0140
Summary of Contents for MAXA HWA1-A 0140
- Page 1 AIR/WATER CHILLERS AND HEAT PUMPS WITH AXIAL FANS CONTROLLER MANUAL Models HWA1-A / HWA1-H 0140 HWA1-A / HWA1-H 0147 HWA1-A / HWA1-H 0260 HWA1-A / HWA1-H 0272 HWA1-A / HWA1-H 0285 This manual has been created for informative purpose. The company declines any responsibility for the results of any projecting or any installation based on the explanations and/or on the technical specifications provided in this manual.
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Page 2: Table Of Contents
HWA1-A Air/water chillers with axial fans INDICE CONSERVATION OF THE MANUAL ............................3 ............................3 RAPHIC SYMBOLS USED IN THE MANUAL PERMITTED USES ................................... 3 GENERAL SAFETY GUIDELINES ..............................3 ............................... 3 ERSONAL PROTECTION EQUIPMENT ..............................3 EALTH AND SAFETY OF WORKERS PURPOSES AND CONTENTS OF THE MANUAL ......................... - Page 3 HWA1-A Air/water chillers with axial fans 14.1 ..................................15 COOLING 14.1.1 Ventilation in freecooling ............................. 16 14.2 (DHW) ......................16 NABLEMENT OF DOMESTIC HOT WATER PRODUCTION 14.2.1 MEMORIZATION OF THE SENSOR IN HEATING MODE ....................17 14.2.2 SANITARY MODE CALL FROM DIGITAL INPUT ......................17 14.2.3 REGOLATOR IN COOLING .............................
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Page 4: Conservation Of The Manual
HWA1-A Air/water chillers with axial fans CONSERVATION OF THE MANUAL The manual has to be always kept for future reference. It has to be stored in a safe place, away from dusts and moisture. It has to be available and accessible to all users who shall consult it any time they are in doubt on how to operate the equipment. The company reserves the right to modify its products and related manuals without necessarily updating previous versions of the reference material. -
Page 5: Purposes And Contents Of The Manual
HWA1-A Air/water chillers with axial fans WARNING: Before proceeding, you should read the user’s-installer manual accompanying the appliance. All the operations described below must be carried out only by QUALIFIED PERSONNEL. The wiring to the terminal block must be performed by qualified personnel. Any routine and/or not-routine maintenance operation shall be carried out when the equipment has been shut down, disconnected from electric power supply. -
Page 6: User - Onboard Controller Interface
HWA1-A Air/water chillers with axial fans 5 USER – ONBOARD CONTROLLER INTERFACE In normal visualization, the 7 segment display with 4 digits shows the regulating temperature reported in tenths of degrees or the warning code if at least one alarm is active. The type of visualization in menu mode page is depending on the position where you are. -
Page 7: Menu's Structure Diagram
HWA1-A Air/water chillers with axial fans Menu’s structure diagram Level 0 (U) = It’s always visible Level 1 (M) = it’s visible if you enter the maintainer or manufacturer password Level 2 (C) = it’s visible if you enter the manufacturer password Level 3 (A) = it’s visible only via Modbus Menu The main functions of the menus are listed below, especially when there are some unambiguous functions. -
Page 8: Alarms Menu
HWA1-A Air/water chillers with axial fans DESCRIPTION Unit Water inlet temperature °C Water outlet temperature °C Compressor intake temperature °C Compressor discharge temperature °C Outdoor air temperature °C Low pressure High pressure *t15 Desuperheater gas temperature sensor (if present) °C *t16 Recovery temperature (if present) °C... -
Page 9: User Adjustable Set-Points
HWA1-A Air/water chillers with axial fans 8. Remove the USB pen-drive from its port. 9. Feed the unit by placing the main switch on the ON state. Perform the procedure for all controllers in the unit. • PARAMETERS UPDATING You can upgrade the parameters using the USB pen-dive via its port on the controller. For the update: 1. -
Page 10: Domestic Hot Water Mode
HWA1-A Air/water chillers with axial fans • b07 = integral time • HzMin = Minimum frequency of operation derived from the algorithms of limitation • HzMaxReg = Maximum working frequency of the compressor in cooling mode The various characteristics are represented in the below table: Step 1 Step 2 Step 2... -
Page 11: Calculation Of The Correction With 0-10V Input
HWA1-A Air/water chillers with axial fans Calculation of the correction with 0-10V input if the input is at 5 volts, the set point will be the value parameter setting. if the input is at 0 volts, the actual set point will be: set point - b15/2. if the input is 10 volts, the actual set point: set point + b15/2. -
Page 12: Circolator Management
HWA1-A Air/water chillers with axial fans Set-point 5°C 5°C 37°C -17°C 10°C 8°C 40°C -20°C 8 CIRCOLATOR MANAGEMENT The circulator of the pump can be set according to one of the following operation modes: Operation by thermo-regulator (default) Operation by thermo-regulator with periodic activation - Continuous operation The circulator will switch off immediately if: - You have a pump (circulator) in locking alarm including the manual reset flow switch alarm. -
Page 13: Operation Under Thermoregulator Call With Periodic Activation
HWA1-A Air/water chillers with axial fans Operation under thermoregulator call with periodic activation The function is disabled if P17= 0 (default). If the pump is set to operate by thermo-regulator actuation (P03 = 1, default), it will be activated periodically for a duration given by the parameter P17 (in seconds) after a counting time set by the parameter P16 (in minutes), activated when the thermoregulation is fulfilled and the pump turned off. -
Page 14: Management Of Double Circulator
HWA1-A Air/water chillers with axial fans Example in cooling: If the difference in temperature between water inlet and outlet is greater than P09 + P10, the pump will run at maximum speed. If the difference temperature between water inlet and outlet is less than P09 - 0.2°C, the pump will run the minimum speed. In the other cases, the pump modulates trying to match the temperature difference with P09. -
Page 15: Defrosting Cycle Management
HWA1-A Air/water chillers with axial fans F11 = Cut-off hysteresis and silent/maximum fan speed F13 = Maximum fan speed in cooling mode F14 = Set temperature/pressure to the maximum fan speed in cooling mode F6-F10 = Set forced fan stop for low condensing pressure The fan operation control in heat pump mode occurs following the diagram shown below, where: F10 = F10 = Delta cut-off of the fan motor in cooling/heating F11 = Cut-off hysteresis in cooling/heating... -
Page 16: Remote On/Off Control
HWA1-A Air/water chillers with axial fans In case you want to produce gelid water, it is necessary to modify the actions of antifreeze resistances, as well as the set of activation of the antifreeze alarm (A08 = 4°C by default) and its hysteresis (A09 = 3.0°C by default). 12 REMOTE ON/OFF CONTROL The ON/OFF function is already enabled by default. -
Page 17: Ventilation In Freecooling
HWA1-A Air/water chillers with axial fans Freecooling demand Temperatura di ripresa Temperatura esterna The free-cooling demand will be activated when the outdoor temperature is lower with F26 than the intake temperature. After activation of the free-cooling, it will stop when the outdoor temperature increases above T - F26 + F27. -
Page 18: Memorization Of The Sensor In Heating Mode
HWA1-A Air/water chillers with axial fans NOTE: − If H10 = 15, the remote shutdown of the unit (remote on-off) or from the on-board unit controller, or from the remote control panel has no effect on sanitary operating mode. The unit will be placed in sanitary mode as setting priority after its power on. -
Page 19: Heating Mode On Domestic Hot Water Tank
HWA1-A Air/water chillers with axial fans 14.2.6 HEATING MODE ON DOMESTIC HOT WATER TANK If the parameter Pa H130 is set to be 1, the unit uses the domestic hot water tank also for heating the plant side. Under these conditions, therefore, the relay that controls the domestic hot water will be excited even during heating mode operation and not only in sanitary mode. -
Page 20: Adjustable Setpoints
HWA1-A Air/water chillers with axial fans 14.5.2 ADJUSTABLE SETPOINTS Setpoint type Setpoint (summer/winter) Summer Winter First setpoint (°C) Coo/Hea 7 (5÷18) 45 (35÷57) Second setpoint (°C) Co2/He2 18 (7÷23) 35 (25÷45) For setting the setpoint from the conboard control panel, you can use the SET button. The second setpoint is greater than the first setpoint in the summer and lower in the winter: •... -
Page 21: Handbook For Some Configurations Of Installation
HWA1-A Air/water chillers with axial fans Value Description Signalization of defrosting period • The digital output is activated at the beginning of defrosting cycle, once the Pa d06 time period has terminated • The digital output is deactivated at the end of defrosting cycle, once the Pa d07 time period is terminated. Signalization of heat pump alarms Signalization of plant season •... -
Page 22: Setting Parameters
HWA1-A Air/water chillers with axial fans 17.4 SETTING PARAMETERS REGULATION PARAMETERS Parameter Description Unit Default Range Visibility Allowed configurations Notes 1.5 (mod. 255-272) Band in cooling mode °C 0÷10,0 INSTALLER 2 (mod. 142) Recommended values included between 1 and 1.5 Hysteresis cut-off of the compressor °C 0.0÷25.5... -
Page 23: Set-Point's Configuration Parameters
HWA1-A Air/water chillers with axial fans 18.1 SET-POINT’S CONFIGURATION PARAMETERS Parameter Description Unit Default Range Visibility Allowed configurations Notes First setpoint in cooling °C H03÷Co2 USER First setpoint in heating °C 45.0 He2÷H01 USER DHW (sanitary) setpoint °C 48.0 H02÷H01 USER Second setpoint in cooling °C... -
Page 24: Circulator Pump Configuration Parameters
HWA1-A Air/water chillers with axial fans 18.6 CIRCULATOR PUMP CONFIGURATION PARAMETERS Parameter Description Unit Default Range Visibility Allowed configurations Note Pump ON Compressor ON delay 0÷255 INSTALLER Pump OFF compressor OFF delay 0÷255 INSTALLER 0 = continuous operation Pump operation mode 0÷1 INSTALLER 1 = operation according to the thermoregulation... -
Page 25: E002 - Low Pressure
HWA1-A Air/water chillers with axial fans 19.3 E002 – LOW PRESSURE If the on board pressure transducer detects a pressure lower than value set from the controller (A16=5 bar by default in cooling mode, 1.5 bar in heating mode) the alarm will be activated. In this case the compressor will stop immediately. The alarm will reset when the pressure goes over a hysteresis of 2.0bar. -
Page 26: E611÷E682] Temperature Sensors' Alarm
HWA1-A Air/water chillers with axial fans 19.15 [E611÷E682] TEMPERATURE SENSORS ALARMS The sensor alarms are all auto-reset type. The alarm of a given sensor inhibits the functions which need its value. For each encoding, see the table below. Conditions of alarm sensor: - Disconnected sensor. - Page 27 HWA1-A Air/water chillers with axial fans H125 : PARITY, STOP BIT NONE, 2 bit ODD, 1 bit EVEN, 1 bit NONE, 1 bit H126 : DEVICE ID 1 ÷ 200 Modbus comands: HOLDING READING REGISTER WRITING 6-16 Register Format Range Name Description Note...
- Page 28 HWA1-A Air/water chillers with axial fans Active only if the setting of bit 3 is Sanitary Sanitary call prohibition (without exiting 7202 BIT MASK 7201 (when the room temp. call is disabling from the actual mode + SAN function) also managed remotely). Only if the machine is in heating 7202 BIT MASK...
- Page 29 HWA1-A Air/water chillers with axial fans Probe 4 error E641 Probe 5 error E651 Probe 6 error E661 Probe 7 error E671 Probe 8 error E681 Probe 9 error E691 Probe 10 error E701 Probe 11 error E711 Module 1 probe 1 error E612 Module 1 probe 2 error E622...
- Page 30 HWA1-A Air/water chillers with axial fans Abnormal condition inverter 3 E963 Inverter 1 EEPROM error E971 Inverter 2 EEPROM error E972 Inverter 3 EEPROM error E973 High discharge temperature of Cp3 E029 Anti-legionella performed correctly E060 Anti-legionella failed or stopped E061 ¹⁾...
- Page 32 09-2020 M.S. A.B. UPDATE OF DEFAULT PARAMETERS 05-2020 M.S. A.B. UPDATE OF THE PARAMETERS b05, b25, MODBUS TABEL 05-2019 M.S. A.B. 10-2018 M.S. A.B. ADDING MODBUS PARAMETERS TABLE 10-2017 A.B. F.M. UPGRADE ACCORDING TO V415R003S01 10-2016 A.B. F.M. UPGRADE ACCORDING TO VER234REV15RC3 08-2016 A.B.
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