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Models:
LAHP-252LT to LAHP-5004LT
Installation manual_LAHP252-5004LT_March 2021
Amicus
Air to Water Heat Pumps
Installation, commissioning, user
and maintenance instructions
READ AND UNDERSTAND THE
INSTRUCTIONS
Read and fully understand all instructions
before attempting to operate maintain or
install the unit.
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Summary of Contents for Lochinvar Amicus
- Page 1 Amicus Air to Water Heat Pumps Installation, commissioning, user and maintenance instructions Models: READ AND UNDERSTAND THE INSTRUCTIONS LAHP-252LT to LAHP-5004LT Read and fully understand all instructions before attempting to operate maintain or install the unit. Installation manual_LAHP252-5004LT_March 2021...
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Page 3: Table Of Contents
CONTENTS 1 INTRODUCTION .................................. 5 2. SAFETY ..................................10 Refrigerant handling............................10 Prevent inhalation of high vapour concentration ....................11 Procedures to be adopted in the event of accidental release of refrigerant ............11 Main Toxicological Information Regarding the Type of refrigerant used ..............11 First Aid Measures ............................... - Page 4 PROBES key ................................. 51 ALARM key................................51 CIRC key ................................52 SERVICE key ................................ 54 Weather compensated function .......................... 57 Setting date and time ............................58 Compressor maintenance............................ 59 Circuit maintenance ............................59 Alarms ................................60 Defrost ................................60 Electrical heater ..............................62 I/O Status (Input/Output) ............................
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Page 5: Introduction
Preliminary information Reproduction, storage or transmission of any part of this publication in any form, without the prior written consent of Lochinvar, is prohibited. The unit to which these instructions refer, is designed to be used for the purposes described and to be operated in accordance with these instructions. - Page 6 Potential Risks Whilst the unit has been designed to minimize any risk posed to the safety of people who will interact with it, it has not been technically possible to eliminate completely the causes of risk It is therefore necessary to refer to the requirements and symbolism below: LOCATION OF RISK POTENTIAL RISK METHOD OF INJURY...
- Page 7 General Description of Symbols Used Safety symbols combined in accordance with ISO 3864-2: Safety symbols combined in accordance with ISO 3864-2: P a g e...
- Page 8 Safety symbols used GENERAL RISK Observe all signs placed next to the pictogram. The failure to follow directions may create a risk situation that may be injurious to the user. ELECTRICAL HAZARD Observe all signs placed next to the pictogram. The symbol indicates components of the unit and actions described in this manual that could create an electrical hazard.
- Page 9 Unit identification Each unit has a rating plate that provides key information regarding the machine. The rating plate may differ from the one shown below as the example is for a standard unit without accessories. For all electrical information not provided on the label, refer to the wiring diagram. A facsimile of the label is shown below: The product label should never be removed from the unit.
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Page 10: Safety
2. SAFETY Warning re potentially hazardous toxic substances Identification of the Type of Refrigerant Fluid Used: R410A • Difluoromethane (HFC-32) 50% by weight CAS No.: 000075-10-5 • Pentafluoroethane (HFC-125) 50% by weight CAS No.: 000354-33-6 Identification of the Type of Oil Used. The lubricant used is polyester oil. -
Page 11: Prevent Inhalation Of High Vapour Concentration
REVENT INHALATION OF HIGH VAPOUR CONCENTRATION Atmospheric concentrations of refrigerant must be minimized and kept to a level that is below the occupational exposure limit. Vapour is heavier than air and can form dangerous concentrations near the ground where the ventilation rate is lower. Always ensure adequate ventilation. -
Page 12: Technical Characteristics
3. TECHNICAL CHARACTERISTICS Unit description The Ami c us series of high efficiency heat pumps has been specifically designed for use with radiant floor heating systems or those applications where it is necessary to have maximum efficiency when heating. They have been optimized on heating mode, are able to produce water up to 60°C and can operate down to -20°C ambient temperature. All versions are supplied with reverse cycle valve used for winter defrost;... -
Page 13: Accessories Description
Electric enclosure The enclosure is manufactured in order to comply with the requirements of the electromagnetic compatibility standards CEE EN60204. Access to the enclosure is achieved by removing the front panel of the unit. The following components are supplied as standard on all units: main switch, a sequence relay that disables the power supply in the event that the phase sequence is incorrect (scroll compressors can be damaged if they rotate in the wrong direction), thermal overloads (protection of pumps and fans), compressor fuses, control circuit automatic breakers, compressor contactors, fan contactors and pump contactors. - Page 14 rotor, to guarantee an ideal cooling of the windings and the absence of power lost due to pulleys and belt transmission. The fan is statically and dynamically balanced class 6.3 according to ISO1940. The electric motor has a separate electronic commuter (driver) and a speed modulation 0-10V, integrated PFC, “burn out”...
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Page 15: Technical Data
TECHNICAL DATA Heating only version (HH) Performances are referred to the following conditions: Sound power level in accordance with Heating: Ambient temperature ISO 3744. 7°C DB, 6°C WB, water Sound pressure level at 10 mt from the temperature 30/35°C. unit in free field conditions in accordance Average conditions, low with ISO 3744. -
Page 16: Operational Limits
Cold water temperature (RV versions only) The minimum user outlet water temperature allowed is 4°C. To operate below this limit the unit should need some structural modifications. In this case please contact Lochinvar Limited. The maximum user outlet water temperature 18°C. - Page 17 (DHW.). The units must be used for this specific purpose only. Lochinvar will not be liable for claims for damage caused to persons, animals or material goods or property caused by improper installation, adjustment and maintenance or improper use.
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Page 18: Domestic Hot Water Production
OMESTIC HOT WATER PRODUCTION Amicus Low temperature units can produce domestic hot water by Pre-heating a gas fired water heater or as part of our Hybrid heat pump system. With a heat pump it is not possible to achieve the supply temperature or work at the large ΔT’s associated with fossil fuel boilers hence the output of a standard indirect coil would be substantially less than that calculated above. -
Page 19: Correction Tables
ORRECTION TABLES Operation with glycol Glycol percentage Freezing point (°C) IPCF WFCF PDCF -3.2 0.985 1.02 1.08 -7.8 0.98 0.99 1.05 1.12 -14.1 0.97 0.98 1.09 1.22 -22.3 0.965 0.97 1.14 1.25 -33.8 0.955 0.965 1.33 CCF: Capacity correction factor IPCF: Input power correction factor WFCF: Water flow correction factor PDCF: Pressure drops correction factor... -
Page 20: Sound Data
OUND DATA Sound data for standard unit Octave band (Hz) dB(A) dB(A) Model 86.1 77.3 71.2 69.7 68.6 63.2 59.8 50.7 86.9 87.1 78.3 72.2 70.7 69.6 64.2 60.8 51.7 87.9 87.1 78.3 72.2 70.7 69.6 64.2 60.8 51.7 87.9 88.1 79.3 73.2... -
Page 21: Installation
5. INSTALLATION ENERAL SAFETY GUIDELINES AND USE OF SYMBOLS Before undertaking any task the operator must be fully trained in the operation of the machines to be used and their controls. They must also have read and be fully conversant with all operating instructions. All maintenance must be performed by TRAINED personnel and be in accordance with all national and local regulations. -
Page 22: Inspection
• List the damage on the delivery note • Inform Lochinvar of the extent of the damage within 8 days of receipt of the goods. After this time any claim will not be considered. • A full written report is required for cases of severe damage. - Page 23 23 | P a g e...
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Page 24: Location And Minimum Technical Clearances
OCATION AND MINIMUM TECHNICAL CLEARANCES All units are designed for external installation: any overhang above the unit and location near trees, if they partially cover the unit, must be avoided in order to prevent air by-pass. It is advisable to create a proper mounting plinth, with a size similar to the unit foot-print. Unit vibration level is very low: it is advisable however, to install vibration dampers (spring or rubber) between the plinth and the unit base-frame to keep vibrations at a very low level. - Page 25 The unit has to be installed such that maintenance and repair is possible. The warranty does not cover costs for the provision of lifting apparatus, platforms or other lifting systems required to perform repairs during warranty period. The installation site should be chosen in accordance with EN 378-1 and 378-3 standards. When choosing the installation site, all risks caused by accidental refrigerant leakage should be taken into consideration.
- Page 26 The unit has to be installed such that maintenance and repair is possible. The warranty does not cover costs for the provision of lifting apparatus, platforms or other lifting systems required to perform repairs during warranty period. The installation site should be chosen in accordance with EN 378-1 and 378-3 standards. When choosing the installation site, all risks caused by accidental refrigerant leakage should be taken into consideration.
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Page 27: Installation Of Rubber Vibration Dampers (Kavg)
(KAVG) NSTALLATION OF RUBBER VIBRATION DAMPERS All units should be installed on vibration dampers in order to prevent the transmission of vibration to the supporting surface and reduce the noise level. Rubber vibration dampers are available as an option in the catalogue. The vibration dampers (optional) are supplied by the factory in separate packaging. -
Page 28: Installation Of Condensate Drip Tray (Brca)
(BRCA) NSTALLATION OF CONDENSATE DRIP TRAY In heating and domestic hot water mode, the unit can produce a quantity of condensate, depending upon the ambient conditions and the working hours. This condensate may freeze in severe ambient conditions. The unit must therefore be installed in such a way as to prevent a slipping hazard to the user or third parties due to the presence of ice around the heat pump. -
Page 29: Hydraulic Connections
YDRAULIC CONNECTIONS The water pipe-work must be installed in accordance with national and local regulation and can be made from copper, steel, galvanized steel or PVC. The Pipework must be designed to cater for the nominal water flow and the hydraulic pressure drops of the system, a maximum pressure drop of 300 Pa/m run being typical. -
Page 30: Hydraulic Components
YDRAULIC COMPONENTS Standard Versions (no Hydraulic kit fitted) User Circuit The water pump must be installed with the supply side toward the water inlet connection of the unit. A1NTU (with Hydraulic kit fitted) User Circuit System Filling Group User water tank Shut-off Valve Flexible Connection Vent Valve... -
Page 31: User Circuit Minimum Water Content
The above values do not guarantee the availability and temperature of domestic hot water; the correct volume MUST be calculated based upon the domestic hot water system type and on the user requirements. Please contact Lochinvar for information regarding this. ILLING THE HYDRAULIC CIRCUIT •... -
Page 32: Typical Installations
YPICAL INSTALLATIONS Amicus Air source heat pump pre-heating an Amicus boost heat pump system 32 | P a g e... - Page 33 Amicus Air source heat pump working with support gas condensing boilers 33 | P a g e...
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Page 34: Electric Connections: Preliminary Safety Information
LECTRIC CONNECTIONS PRELIMINARY SAFETY INFORMATION The electric panel is located inside the unit at the top of the technical compartment where the various components of the refrigerant circuit are also to be found. To access the electrical board, remove the front panel of the unit: Power connections must be made in accordance to the wiring diagram enclosed with the unit and in accordance to the norms in force. -
Page 35: Electric Data
LECTRIC DATA The electrical data reported below refer to the standard unit without accessories. In all other cases refer to the data reported in the attached electrical wiring diagrams. The line voltage fluctuations cannot be more than ±10% of the nominal value, while the voltage unbalance between one phase and another cannot exceed 1%, according to EN60204. - Page 36 Electric data may change for updating without notice. It is therefore necessary to refer always to the wiring diagram present in the units. 36 | P a g e...
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Page 37: Electric Connections
LECTRIC CONNECTIONS Power supply and electrical connections Input for electrical connections Input for power supply Remote wiring connections (compulsory) All terminals referred to in the explanations below will be found on the terminal board inside the electrical box. All electric connections mentioned below have to be made by the installer, on site. - Page 38 Remote wiring connections (optional) REMOTE SUMMER / WINTER CHANGE OVER To remotely switch the unit from heating to cooling, the cable jumper connected across terminals 50 and 49 must be replaced with a switch. 50 49 Contact closed, unit in Winter mode, Contact open, unit Summer mode.
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Page 39: Priority Selector (Hot Water)
PRIORITY SELECTOR (H OT WATER If a priority selector switch is to be fitted, a voltage free switch has to be connected to terminals 50 and 57. The selector operates as follows: Closed contact: Domestic hot water only; 50 57 Opened contact: Domestic hot water / Heating (and / or cooling);... -
Page 40: Positioning Of The User Circuit Water Inlet Sensor (Bti)
(BTI) OSITIONING OF THE USER CIRCUIT WATER INLET SENSOR The correct positioning of the BTI sensor is extremely important to guarantee the correct operation of the heat pump. The BTI sensor is used to cycle the unit to maintain the user water temperature at set point. The BTI sensor is also used to activate the user water pump and to stop it when the user water temperature set point is reached. -
Page 41: Refrigerant Circuit Layout
EFRIGERANT CIRCUIT LAYOUT Refrigerant circuit layout version SAISE P2U - P2S - single finned coil P2U Version This is a two pipe version that can produce hot water for heating and cold water for cooling. The unit is used with two pipe water based change-over systems. - Page 42 Refrigerant circuit layout version HAIHE P2U - P2S - double finned coils P2U Version This is a two pipe version that can produce hot water for heating and cold water for cooling. The unit is used with two pipe water based change-over systems. It is not able to produce domestic hot water. P2S Version This is a two pipe version that can, in addition to producing hot water for heating and cold water for cooling, also generate domestic hot water.
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Page 43: Unit Start Up
6. UNIT START UP RELIMINARY CHECKS Before starting the unit the checks detailed in this manual of the electric supply and connections (par. 4.20), the hydraulic system (par. 4.11) and the refrigerant circuit (par. 5.1.4), should be performed. Start-up operations must be performed in accordance with the instructions detailed in the previous paragraphs. If it is required to switch the unit on and off, never do this using the main isolator: this should only be used to disconnect the unit from the power supply when the unit is to be permanently off. -
Page 44: Device Set-Point Differential Reset
If the unit is required for heating only (without domestic hot water production) the internal parameter of the microprocessor FS1 has to be modified from 2 to 1 in order to avoid configuration alarms. Please contact Lochinvar for support. ONTROLS DURING UNIT OPERATION •... -
Page 45: Position Of The Control Panel
OSITION OF THE CONTROL PANEL Control panel Unit ON: Heating 00:00 01/01/2014 30.0 °C Evaporator inlet temperature 35.0 °C Evaporator outlet temperature 5.0 °C External air temp. (FC) San. water temperature 50.0 °C PROBES ALARM CIRC. SERVICE Display icons Meaning Meaning Number of compressors in operation. - Page 46 Key function Allows to read the value of the probes configured PROBES Allows to switch on the unit in cooling mode Allows to read and modify the set point Allows to read and reset the alarms ALARM Allows to switch on the unit in heating mode Allows to enter the SERVICE menù...
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Page 47: To Remote The Control
O REMOTE THE CONTROL Remote keyboard connection (VGI890) ENTER Rosso / Red Nero / Black Nero / Black Rosso / Red Special care must be taken when connecting the keyboard to the Ichill200D, to avoid irreparable damage to the controller or/and keyboard •... -
Page 48: Switch The Unit On
WITCH THE UNIT ON Unit switch-on and switch-off can take place: • From the keyboard • From digital input configured as remote ON/OFF Switch the unit on from the keyboard Heating mode To start the unit in heating mode, press the key. -
Page 49: Switch The Unit On From Digital Input
Heating and cooling mode The display shows the typical visualization during the unit working in: HEATING MODE Unit ON: Heating 00:00 01/01/2014 Evaporator inlet temperature 28.4 °C 27.0 °C Evaporator outlet temperature External air temp. (FC) 31.8 °C San. water temperature N.C. -
Page 50: Set Point
Set point compensation 0÷15°C 10°C Password (Contact Lochinvar) The units are supplied with a very sophisticated control system with many other parameters that are not adjustable by the end user; these parameters are protected by a manufacturer password. 50 |... -
Page 51: Probes Key
• Password: in this case the alarm is no longer active, but you need a password to reset it (please contact Lochinvar). • Active: the alarm is still active and it is not possible to reset it. -
Page 52: Circ Key
CIRC CIRC Pressing can view the different parameters of the unit: Pressing you move from one screen to another while with you scroll through the menu items. Press ENTER key to view the values. State of the compressors; the display shows compressors present in each circuit and the activation status of each one. Colour black: compressor running Colour white: compressor on standby In case of use of compressors in part-loading (typically screw compressors) an icon appears to the right of the compressor showing the... - Page 53 53 | P a g e...
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Page 54: Service Key
SERVICE Press the SERVICE key to access the following menus: Setting parameters (for service only) Electrical heater and pump down valve status Time and date setting I/O status (Inputs and Outputs) Compressors status Screw compressor information (Not configured) Pumps Auxiliary outputs Circuit maintenance Domestic hot water (if available) Free cooling and Solar panel visualization (if... - Page 55 Service parameters setting ENTER To enter service menu select moving between the icons with keys and press The system prompts you to enter the password to access to different levels of security. 1st level password (Pr1) ALARM EXIT The first level allow to modify some parameters as for example heating and cooling set points and dynamic set points. Press key, with modify the password to 1 then press again to confirm.
- Page 56 To modify the value of the parameter: press to select the parameter to modify then press the value start to blinking, press to modify, than press again to confirm. The values available in the group of parameters “Set point” (St) are: summer set point (St01), winter set point (St04), summer regulation band (St07) and winter regulation band (St08).
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Page 57: Weather Compensated Function
EATHER COMPENSATED FUNCTION This function makes it possible to activate the weather compensation sensor in order to optimize the efficiency of the unit. Automatically it modifies the set-point value with respect to external air temperature: a calculation is performed on the set-point to provide a revised value of set point for higher ambient conditions (see example given below). -
Page 58: Setting Date And Time
The values available in the group of parameters “Sanitary circuit” (FS) are: Sanitary water priority (FS02), Sanitary water set point (FS03), Sanitary water proportional band (FS04) . ETTING DATE AND TIME ENTER To enter this menu select moving between the icons with the keys and press Press to select the value you want to edit than press... -
Page 59: Compressor Maintenance
OMPRESSOR MAINTENANCE ENTER To enter this menu moving between the icons with the keys and press It is possible to display the compressors working hour and the number of activations. Select the circuit with the keys than ENTER ENB/DIS press to display the parameters. -
Page 60: Alarms
LARMS ENTER To enter this menu select moving between the icons with the keys and press For the management of alarms see par. 6.5. Alarms b1HP Ak t c ttv v o e Clock alarm Alarm log ENTER To enter this menu select moving between the icons with the keys and press RST ALL... - Page 61 Defrost Circuit 1 Time to start (mm:ss) 61 | P a g e...
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Page 62: Electrical Heater
Press to display all the available parameters. : cycle not in progress : cycle not in progress Condenser 1 probe Defrost end set 36.2 bar 36.2 bar Evaporator 1 probe Combined defrost probe N.C. N.C. Defrost start set Combined defrost start set Reale defrost set point Combined defrost end set ALARM... -
Page 63: Screw Compressor (If Available)
CREW COMPRESSOR F AVAILABLE ENTER To enter this menu select moving between the icons with the keys and press In the main screen it is possible to display the discharge temperature and the liquid injection set point. Press keys to ENTER select the required circuit than press key to read the discharge temperature and the status of the valves. -
Page 64: Sanitary Water
ANITARY WATER ENTER To enter this menu select moving between the icons with the keys and press It is possible to read information of the sanitary water regulation. Press key to modify the values. Sanitary water temp. Sanitary water temp. 44.9 °C 45.3 °C... -
Page 65: Maintenance Of The Unit
7. MAINTENANCE OF THE UNIT General warnings Starting from 01/01/2016 the new European Regulation 517_2014, “Obligations concerning the containment, use, recovery and destruction of fluorinated greenhouse gases used in stationary refrigeration, air conditioning and heat pumps”, became effective. This unit is subject to the following regulatory obligations, which have to be fulfilled by all operators: (a) Keeping the equipment records (b) Correct installation, maintenance and repair of equipment... -
Page 66: Periodical Checks
ERIODICAL CHECKS The start-up operations should be performed in compliance with all requirements of the previous paragraphs. All of the operations described in this chapter MUST BE PERFORMED BY TRAINED PERSONNEL ONLY. Before commencing service work on the unit ensure that the electric supply is disconnected. The top case and discharge line of compressor are usually at high temperature. -
Page 67: Decommissioning
• The units covered by the RAEE Directive are marked with the symbol shown above. • The potential effects on the environment and human health are detailed in this manual. • Additional information can be obtained from Lochinvar Limited. 67 |... -
Page 68: Diagnosis And Troubleshooting
Configuration alarm ACF2 Configuration alarm ACF3 Configuration alarm ACF4 Configuration alarm Wrong configuration of microprocessor ACF5 Configuration alarm Contact Lochinvar. control system. ACF6 Configuration alarm ACF7 Configuration alarm ACF8 Configuration alarm ACF9 Configuration alarm Switch OFF the unit and, after few... - Page 69 Code Alarm Description Cause Solution Alarm ambient sensor Not used Check the electrical connection of the Wrong electrical connection, Sensor sensor to the terminal board, if correct Not used defect. call the service to replace the sensor. AtE1 Evaporator water pump 1 overload AtE2 Evaporator water pump 2 overload In heating mode:...
- Page 70 Notes 70 | P a g e...
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