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LA 6 MI LA 9 MI LA 12 MI LA 16 MI Installation Instructions For LA MI inverter air-to-water heat pump systems packages 8/60379/0
The installation instructions are intended for use by the installer whilst they are on site. Further clarification can be obtained from the relevant technical manuals. Supporting documents The following documents are available to aid in the planning, installation, operation and maintenance of the Air-eau heat pumps: Technical manuals Contains the necessary information required during the planning stages.
Contents Supporting documents ......................................................................................................................................................... 2 Section 1: Scope of delivery and handling ................................................................................................................................ 5 Table 1: Items supplied with the LA MI ..................................................................................................................
Setting the Advanced settings ............................................................................................................................................ 22 Setting the Advanced settings (continued) ......................................................................................................................... 23 Setting the Advanced settings ............................................................................................................................................
Section 1: Scope of delivery and handling Description Qty Product handling Protective grommet to prevent damage to cables (LA 12 / 16 MI only) 2+3 Remote controller for internal wall mounting 1 Use a wooden pallet for transporting the heat pump to the final installation location. Remote controller cable 15m long 1 Note that the two metal rails that hold the heat pump together are essential for the structural stability and should not be removed. Removing these rails would invalidate the warranty.
Section 2: Pre-installation checks Before starting the practical work the installer must ensure that the following information has been confirmed during the design stage. Correct selection of the heat pump, heat emitters and circulation system is essential for efficient operation of the entire system. For information about efficient design and operation see the Inverter heat pump planning manual.
Section 3: Installation considerations The installation of an air source heat pump should be carried out by a Dimplex Accredited installer. Installation location The heat pump is for outdoor installation only. The following should be verified. Further information is available in the planning manual.
Minimum Ventilation clearances Wall mounting For adequate air flow the distances shown in Figure 3 must be observed. The free field indicates that no object will disrupt the air flow out of the unit. If the heat pump is to be wall mounted a condensate collection tray (supplied by the installer) should be fixed under the heat pump. The pipe from the tray to a suitable drain should be heated so that it can‟t freeze and become blocked.
Section 4: Heating System Connection When connecting the heating system, all applicable regulations must also be adhered to including all relevant European and national regulations and local building regulation codes. Work that requires the covers to be removed must only be carried out under supervision of qualified contractor, installation engineer or service person. The installation of an air source heat pump must be carried out by a Dimplex Qualified installer.
Condensate During normal operation the heat pump will remove water vapour from the air. The condensate will run down the evaporator into the condensate tray where it will drain out of the unit. Defrosting takes place up to 16 times per day, with up to 3 litres of condensed water being produced each time. Figure 6: Minimum straight pipe distance before entrace to Taconova unit Condensed water that forms during operation must be drained off frost-free.
Figure 8: Isolation valve and filter supplied in LA MI packages to be fitted to the heat pump return. Figure 11: Pressure relief valve Expansion vessel sizing The heat pump comes with an expansion vessel already installed as shown in the „Performance data table‟. Depending upon the specific system the installer must determine if a second expansion vessel is required. For most installations the 10L expansion vessel should be able suitable with a volume up to 150L and a static height of 7m.
Controlling DHW temperature The cylinder temperature is controlled via an NTC2 sensor. For safety reasons the heat pump controller also checks for continuity from the DHW thermostat. The temperature regulation thermostat and high limit stat are wired in series. To keep the contacts closed on the regulation stat the dial must be set to maximum. The contacts on the high limit stat will remain closed during normal operation.
Section 5: Electrical Connection When connecting the heat pump to the power supply, the relevant EN standards must be complied with. Any further connection requirements stipulated by local utility companies must also be observed. It is important that the hydraulic connections have been completed prior to switching on the power supply. Depending upon the installation the heat pump could have the following cables that it will be necessary to route from the heat pump into the property. 1. 2. 3. 4. 5.
Connection of the power supply to the Heat pump LA 6 and 9 MI LA 12 and 16 MI Figure 15: Connection of the power supply cable Main power supply cable The power connection of the heat pump is made via a standard 3-core cable. The cable has to be supplied by the installer and the wire cross-section is to be selected according to the power consumption of the heat pump as shown in Similarly, the main circuit breaker (MCB) at the distribution board should be correctly rated as shown in Table 2.
RCCD 1 RCCD 2 MCB In line flow boiler In line flow boiler + + DHW immersion switched by heat pump DHW immersion switched by a relay controlled by the heat pump or no DHW immersion installed 21A 26A 13A Compressor & controller LA 6 MI 23A 26A LA 9 MI LA 16 MI Suggested „type C‟ MCB rating 47 50 34 50 49 50 36 50 13A LA 12 MI Total running current (Amps) RCCD 1 RCCD 2 RCCD 3 MCB Compressor & controller In line flow boiler DHW immersion switched by hea
Inline flow boiler If the inline flow boiler is not wired in the frost protection function will not fully function. The circulation pump will run but no additional heat will be added to the system by the inline flow boiler. This increases the risk of the water in the system freezing. Domestic hot water immersion The heat pump is capable of switching a 3kW immersion directly without the need for an additional relay as shown on the standard wiring diagram.
Controller cable The controller cable is connected to the heat pump controller using the two rectangular plug connectors as shown in Figure 18. The cable cannot be extended because this would increase the resistance and correct operation of the controller cannot be guaranteed. The cable is 15m long but 1.5m is required inside the heat pump leaving 13.5m for routing to the controller. The cable is included within the scope of supply. The power for the controller is supplied from the heat pump.
Figure 21: Heat pump communication connections External controller cable This can be used to remotely put the heat pump in standby mode upon breaking the connection from an external control device. When in standby the heat pump frost protection will still be activated. To enable this function a factory fitted jump lead between terminals 17 and 18 must be removed. 2 x Two way valves 2 x two-way valves are necessary if the heat pump needs to switch mode from space heating to domestic hot water production.
Section 6: Installation of the controller The controller should be installed: In a place which is away from direct sunlight and high humidity. On a flat surface to prevent warping of the remote controller and damage to the LCD screen. Where the LCD can be easily seen for operation. (Standard height from the floor is 1.2 to 1.5 meters.) In a location where the cable can be fed though the wall or to the surface of the wall and attached in such a way as not to cause snagging.
Section 7: Programming of the controller OFF/ON Standby Button Quiet Operation Indicator OFF/ON Operation LED Inline flow boiler request Indicator OFF/ON Operation Mode Button Force Inline flow boiler Request Indicator OFF/ON Quiet Operation Button Inline flow boiler status (OFF/ON) Inline flow boiler ( Enable / Disable ) Immersion Heater status (OFF/ON) System Set-up Buttons System Set-up mode Indicator OFF/ON Timer Setting Buttons System Check mode indicator OFF/ON Force Inline flow boiler
Quiet Operation Button Timer/Clock Setting Display The time and day must be set at first power on or after a prolonged power outage. The time must also be set before the other menus can be accessed. 1. Press 2. Press 3. Press . or Reduces the noise of the heat pump by approximately 5dbA for the double fan heat pumps and 3dBA for the single fan heat pumps by reducing the fan and compressor speed. This will affect the COP and kW output. Inline flow boiler ( Enable / Disable ) to set current day.
Setting the Advanced settings 2. Press The special functions can only be set if the Operation LED is OFF. or 3. Press 1. Press and for 5 seconds to enter the 4. Press to scroll through the functions. to enter the function. or to select the desired value. advanced settings mode. The “SETTING” indicator Room thermostat connection (Yes / No) Yes - the heat pump is interlocked with a wall mounted thermostat such has the Horstmann PRT1.
Setting the Advanced settings (continued) 3. Press The special functions can only be set if the Operation LED is OFF. 4. Press 1. Press and for 5 seconds to enter the advanced settings mode. The “SETTING” indicator will be displayed. or or to select the desired value. to confirm. to scroll through the functions. Sterilization (Yes / N0) To sterilization of the DHW cylinder. Sterilisation Day & Time set To the start time for sterilisation once per week.
Setting the Advanced settings 2. Press The advanced settings can only be set if the Operation LED is OFF. or 3. Press 1. Press to scroll through the functions. to enter the function. for 5 seconds to enter the advanced 4. Press settings mode. The “SETTING” indicator will be or to select the desired value. displayed. 5. Press to confirm.
Figure 23: Weather compensation graph Setting the timer Weekly timer setting Press . Press or to select the correct day. Press for each of the required days. A hat symbol will be displayed above the selected days. The program number 1 to 6 will then start flashing. It is possible to set 6 programs per day. This function can be used to set the time and day in the week when: The mode changes to HEAT, HEAT + TANK or TANK. Quiet mode Press or to scroll to the correct program and then press .
Section 8: Setting the system to work After completing the heating system and electrical connections the following procedure should be followed to set the system to work. 11. Check the water flow rate on the Taconova unit is within the correct limits. Adjust the circulation pump if necessary. Hydraulic circuit 12. Check that the heat pump is able to achieve the correct temperature in the DHW cylinder by reading the sensor using the heat pump controller. 1.
. Section 9: Technical specification of the LA MI range Component Notes Water Pump Circulates water around the heating circuit. Pressure Gauge Gives the pressure of the water in the heating circuit. Flow Switch Checks the water flow in the heating circuit for efficient and safe operation. Pressure relief valve A safety device that relieves the pressure in the heating circuit if it exceeds 3 bar. Inline flow boiler Additional heating capacity for Bivalent operation.
Performance Data 1 Type and order code 2 Design LA 6 MI 2.1 Degree of protection according to EN 60 529 for a compact unit or heating element 2.2 Installation location 3 Performance Data 3.1 Operating temperature limits: 3.2 LA 9 MI IP 24 IP 24 Outdoors Outdoors Heating water flow / return flow °C Max. 55 / min. 25 Max. 55 / min. 25 Air °C -20 to+35 -20 to+35 Heating water temperature difference at A7 / W35 Heat output / COP (defrost) at A7 / W35 5 5 kW / --- 6 / 4.
Performance Data 1 Type and order code 2 Design LA 12 MI 2.1 Degree of protection according to EN 60 529 for a compact unit or heating element 2.2 Installation location 3 3.1 3.2 LA 16 MI IP 24 IP 24 Outdoors Outdoors Performance Data Operating temperature limits: Heating water flow / return flow °C Max. 55 / min. 25 Max. 55 / min. 25 Air °C -20 to+35 -20 to+35 K 5 5 kW / --- 11.9 / 4.6 15.9 / 4.1 kW / --- 10.6 / 3.5 13.7 / 3.0 kW / --- 12.3 / 2.9 13.8 / 2.
Product Dimensions LA 6 MI and LA 9 MI Page 30
Product Dimensions LA 12 MI and LA 16 MI Page 31
Section 10: Annual System Health checks Hydraulic Any work on the heat pump may only be performed by authorised and qualified after-sales service technicians. The following items should be verified to ensure efficient operation of the system: Water pressure higher than 1 bar. Pressure relief valve operation is normal. The filter is clear of debris. Check entire system for leaks.
Section 11: Trouble shooting for the installer Symptom Heat pump emits mist Heat pump does not operate Cause This is normal during certain atmospheric conditions because the drop in air temperature caused by the heat pump is cold enough for mist to form. If the external temperature is above the HEAT OFF (in advanced settings menu) the heat pump will not operate. If the water inlet temperature is lower than 20°C the inline flow boiler will activate to raise the temperature.
Section 12: Error codes Diagnosis display Abnormality control / Protection H12 Indoor/Outdoor capacity unmatched Abnormality Judgement Primary location to verify 90s after power supply • Indoor/outdoor connection wire • Indoor/outdoor PCB • Specification and combination table in Catalogue H15 Outdoor compressor temperature sensor Continue for 5 sec. • Compressor temperature sensor (defective or disconnected) abnormality H23 Indoor refrigerant liquid temperature Continue for 5 sec.
Diagnosis display Abnormality control / Protection F12 Pressure switch activate Abnormality Judgement Primary location to verify 4 times occurrence within 20 • Pressure switch minutes F14 F15 F16 F20 Outdoor compressor abnormal revolution 4 times occurrence within 20 • Outdoor compressor Outdoor fan motor lock abnormality 2 times occurrence within 30 • Outdoor PCB minutes • Outdoor fan motor Total running current protection 3 times occurrence within 20 • Excess refrigerant minutes
Diagnosis display Abnormality control F43 F45 / Protection Abnormality Judgement Primary location to verify Outdoor defrost sensor abnormality Continue for 5 sec. • Outdoor defrost sensor (defective or Indoor water outlet temperature sensor Continue for 5 sec.
Section 13: Standard packages To assist with the design and installation of a system Dimplex have collated wiring and hydraulic schematics for the following designs: Package 1 and 2 Package 3 Heating and Domestic hot water preparation is done using the heat pump. Buffer cylinder is supplied either in a combined buffer/DHW cylinder (pack 1) or as a standalone buffer (pack 2) 2 x two port valves are used to switch between heating and DHW preparation.
Suggested additional components Pack 1 1 heating zone and DHW with combined buffer and DHW cylinder Pack 2 1 heating zone and DHW with separate buffer and DHW cylinder Pack 3 1 heating zone with buffer tank Concrete base, fixing bolts, condensate drain method Interconnecting pipe work Ducting for wiring and pipe work Chemicals for cleaning existing pipe work and standard corrosion inhibitors for central heating systems Air purge valves at every high point Isolation switch for isolation of heat pump durin
Package 1 and 2 – Plumbing Schematic 1 x heating zone, buffer and DHW cylinder, DHW immersion powered by heat pump ` Notes: 1. Air bleed valves must be installed at every high point. 2. Depending upon the system volume an expansion vessel may be required in addition to the one already installed in the LA MI 3. When using a Dimplex Ec-Eau cylinder with an Air-Eau heat pump it is not necessary to install a separate 2 port value for G3 compliance. Page 39 4.
User’s guide to an Air-eau heat pump system How the heat system works Advanced operation The heat pump takes renewable energy from the surrounding air and converts it into usable heat. For every 1kW of electrical energy the heat pump uses it will extract approximately 3kW of energy from the outside air making it 400% efficient which reduces carbon emissions and money off your fuel bills! At the commissioning stage the installer will set-up the advanced settings.
Adjusting the heat pump Adjusting the central heating The central heating is controlled using the wall mounted thermostat shown below. You should press the large buttons to adjust the room temperature. OFF/ON Standby Button When the unit is ON, the operation LED is lit and the compressor will operate when required. When in standby the compressor will not operate however the circulation pump and inline flow boiler can be activated to provide frost protection. The green LED should remain on at all times.
