Dettson GREE E Series Service Manual
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Dettson GREE E Series Service Manual

Normal-temperature versati water heater
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E Series Normal-temperature Versati Water Heater

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Summary of Contents for Dettson GREE E Series

  • Page 1 Service Manual E Series Normal-temperature Versati Water Heater...

  • Page 2: Table Of Contents

    Contents Product Data ........................1 1 Product Data ....................... 1 1.1 Lineup ..........................1 1.2 Nomenclature ........................1 1.3 Product Features ......................1 1.4 Operating Principle ......................3 1.5 Technical Data ........................4 2 Outline Dimensions ....................7 2.1 Outline Dimensions of the Outdoor Unit ................7 2.2 Outline Dimensions of the Indoor Unit ................7 3 Explosive Views and Part Lists .................
  • Page 3 7.2 Heat Load Calculation .....................19 7.3 Model Selection ......................20 Control .......................... 21 1 Integral Control Concept ..................21 1.1 Control Principle Diagram ....................21 1.2 Control Flowchart ......................24 2 Main Control Logics ....................24 2.1 Cooling ..........................24 2.2 Heating ..........................25 2.3 Water Heating .......................25 2.4 Shutdown ........................26 2.5 Control to the Compressor ....................26 2.6 Control to the Fan ......................26...
  • Page 4 4.9 Wiring Diagram .......................74 4.10 Wiring of the Terminal Board ..................80 4.11 Wiring of the 2-Way Valve .....................80 4.12 Wiring of the 3-Way Valve .....................81 4.13 Wiring of Other Auxiliary Heat Sources .................82 4.14 Wiring of the Gate-Controller ..................82 4.15 Wiring of the Remote Air Temperature Sensor .............82 4.16 Wiring of the Thermostat ....................83 4.17 Wiring of the Control .....................84 5 Commissioning and Trial Run .................

  • Page 5: Product Data

    Air-to-water Heat Pump Split Versati SPLIT TYPE Product Data 1 Product Data 1.1 Lineup 1.1.1 Main Unit Cooling Heating Power Series Model Product Code Capacity Capacity Refrigerant Image Supply (kW) (kW) GRS- 49474 52886 208/230VAC ER01001490 R410A CQ16Pd/ (14.5) (15.5) 60Hz NaE-D 1.2 Nomenclature...

  • Page 6: Operating Principle

    Air-to-water Heat Pump Split Versati SPLIT TYPE 1.3.2 Features Wide Operation Range ◆ Heating: -4~95°F(-20~35°C); Cooling: 50~118.4°F(10~48°C); Water Heating: -4~113°F(-20~45°C). High-efficiency Component(Inverter pump, Inverter fan, Plate heat exchanger) ◆ (1) The DC inverter fan can control the air volume accuratately and make the system run more stably and save more energy.
  • Page 7 Air-to-water Heat Pump Split Versati SPLIT TYPE 1.4.1 Schematic Diagram Outdoor Unit Indoor Unit Field Supplied Name Name Name Liquid Temperature Compressor Water Tank Sensor of the PHE Discharge Temperature Gas Temperature Sensor Leaving Water Temperature Sensor of the PHE Sensor of the Solar System Flow Switch for the Solar High Pressure Switch...

  • Page 8: Technical Data

    Air-to-water Heat Pump Split Versati SPLIT TYPE 1.5 Technical Data 1.5.1 Parameter List Model GRS-CQ16Pd/NaE-D Product Code ER01001490 Cooling(floor cooling) Btu/h(kW) 49474(14.5) Capacity*1 Heating(floor heating) Btu/h(kW) 52886(15.5) Cooling(floor cooling) Power Input*1 Heating(floor heating) 3.75 EER*1(floor cooling) (Btu/h)/W, (W/W) 13.02(3.82) COP*1(floor heating) (Btu/h)/W, (W/W) 14.10(4.13) Cooling(for Fan coil)
  • Page 9 Air-to-water Heat Pump Split Versati SPLIT TYPE 1.5.2 Nominal Working Conditions Water Side Air side Item Entering Water Temp Leaving Water Dry Bulb Temperature Wet Bulb Temperature °F(°C) Temperature °F(°C) °F(°C) °F(°C) Floor Heating 86(30) 95(35) 44.6(7) 42.8(6) FCU Heating 104(40) 113(45) 44.6(7)
  • Page 10 Air-to-water Heat Pump Split Versati SPLIT TYPE 1.5.5 Capacity Correction Cooling Capacity Correction ◆ GRS-CQ16Pd/NaE-D Performance correction Ambient Temperature °C (°F) Leaving Chilled Water °C (°F) 25(77) 30(86) 35(95) 40(104) 45(113) 5(41.0) 0.995 0.955 0.905 0.855 0.805 6(42.8) 1.045 1.005 0.955 0.905 0.855...

  • Page 11: Outline Dimensions

    Air-to-water Heat Pump Split Versati SPLIT TYPE 2 Outline Dimensions 2.1 Outline Dimensions of the Outdoor Unit (1) GRS-CQ16Pd/NaE-D(O) Unit:mm (inch) 900 (35-7/16) 572 (22-1/2) 2.2 Outline Dimensions of the Indoor Unit (1) GRS-CQ16Pd/NaE-D(I) Unit: mm (inch) 324 (12-3/4) 500 (19-11/16)

  • Page 12: Explosive Views And Part Lists

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3 Explosive Views and Part Lists (1) GRS-CQ16Pd/NaE-D(I) Parts List of GRS-CQ16Pd/NaE-D(I) for ER010N1490 Name of part Part Code Quantity Display Board 30292000047 Temp Sensor Sleeving 05212423 Water Pressure Gauge 49028009 Strainer 07412808 Electric Box Assy 100002064994 Plate-type Heat Exchanger...
  • Page 13 Air-to-water Heat Pump Split Versati SPLIT TYPE Name of part Part Code Quantity Receiver Board 30261014 (2) GRS-CQ16Pd/NaE-D(O) Parts List of GRS-CQ16Pd/NaE-D(O) for ER010W1490. Name of part Part Code Quantity Electric Box Assy 100002064984 Rear Grill 016001000045 Condenser Sub-Assy 0115410000802F Supporting Strip(Condenser) 01894100026 Capillary tube...

  • Page 14: Supply Scope

    Air-to-water Heat Pump Split Versati SPLIT TYPE Name of part Part Code Quantity Gas-liquid Separator 035027060007 Right Connection Board 01344100003P Cut off Valve 07334100016 Compressor and Fittings 00204100001 Electrical Heater(Compressor) 7651521216 Sensor Support 26905202 Drainage Connecter 06123401 Drainage hole Cap 06813401 Front Grill 016004060002...

  • Page 15: Model Selection

    Air-to-water Heat Pump Split Versati SPLIT TYPE Model Selection 1 Installation Example CASE 1: Connecting Under-floor Coil for Heating and Cooling Underfloor coil Indoor unit Outdoor unit Radiator FCU 1 FCU 2 Remote room thermostat 2-way valve (Field supplied) (Field supplied) By-pass valve Control line (Field supplied)
  • Page 16 Air-to-water Heat Pump Split Versati SPLIT TYPE CASE 2: Connecting Sanitary Water Tank Under floor coil Radiator FCU 1 FCU 2 Outdoor unit Indoor unit Hot water Sanitoary water tank City water Booster heater Remote room thermostat 2-way valve 3-way valve (Field supplied) (Field supplied) (Field supplied)

  • Page 17: Model Selection

    Air-to-water Heat Pump Split Versati SPLIT TYPE (c) Sanitary water tank should be equipped with internal electric heater to secure enough heat energy in the very cold days. (d) The 3-Way valve is automatic controlled by the unit. It switches to water tank loop for the water heating mode and switches to floor/FCU loop at the space cooling/heating mode.

  • Page 18: Design Principle

    Air-to-water Heat Pump Split Versati SPLIT TYPE 2.4 Design Principle (1) Cooling: capacity of the unit ≥ cooling load of the air conditioning (2) Heating: capacity of the unit ≥ max{ heating load, floor heating load, water heating load} (3) Water Tank: it should be selected based on the sanitary outfit or quantity of users. Each unit can accommodate only one water tank.

  • Page 19: Quantity And Location Of The Water Manifolds

    Air-to-water Heat Pump Split Versati SPLIT TYPE U-shaped Coil Square-shaped Coil (Recommended) Length of coils is calculated as below: Square-shaped coil: =L*W/tube spacing=area/tube spacing U-shaped coil: =L-1+L*W/tube spacing=L-1+area/tube spacing The reason why the square-shaped coils are recommended is because they can keep even temperature distribution.
  • Page 20 Air-to-water Heat Pump Split Versati SPLIT TYPE Example for how to calculating the floor heating area per single loop: when the tube length is 120m, and tube spacing is 200mm, then the floor heating area per single loop is 120×0.2=24m (4) One water manifold cannot be used for different floors, or it would cause uneven water distribution.

  • Page 21: Requirements On Installation Of The Water Manifold

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.2 Requirements on Installation of the Water Manifold (1) The water manifold should be installed on the wall or inside the special box. For housing constructions, it is generally installed in the kitchen. (2) The valve for the water manifold should be installed horizontally and keep a distance of at least 300mm to the ground.

  • Page 22: Selection Of The Water Tank

    Air-to-water Heat Pump Split Versati SPLIT TYPE Cooling Heating Static Air Volume Type Capacity Capacity Pressure Appearance CFM(m Btu/h(kW) Btu/h(kW) (Pa) 16951~60036 15354~30708 23202~46744 Cassette type —— (480~1700) (4.5~9) (6.8~13.7) 6 Selection of the Water Tank 6.1 Specifications of the Water Tank The insulation water tank is optional and can be purchased locally by customers.

  • Page 23: Examples For Model Selection

    Air-to-water Heat Pump Split Versati SPLIT TYPE Empirical values are worked out under conditions of 80L consumption (per day per person), 8L/min flow rate of the shower head, and 10 minutes use duration per person. 7 Examples for Model Selection 7.1 General Introduction to the Example Project For a three-floor apartment, there is a master room and a bath room for each floor and both of them require floor heating.

  • Page 24: Model Selection

    Air-to-water Heat Pump Split Versati SPLIT TYPE 7.2.5 Check A. Check for the flow rate 0.3622/2 =0.2503m/s 3.14*0.008 *3600 Floor rate of each loop is within 0.25~0.5m/s and the system can run stably. B. Check for the tube length When the average tube spacing is 30mm, the required length of the heating pipe per square meter is 3.5m, length of total coils is 3.5×40=140 and length for each loop is 140/2=70.

  • Page 25: Control

    Air-to-water Heat Pump Split Versati SPLIT TYPE Control 1 Integral Control Concept 1.1 Control Principle Diagram Output Control Main Unit Field Instalaltion RS485 Power Main Board Supply Field Instalaltion Main Unit Input Control (1) The environment temperature is detected by the sensor installed at fins of the finned heat exchanger, which is mainly used to control the initialization steps of the fan and the electronic expansion valve and also limit the maximum running frequency of the compressor.
  • Page 26 Air-to-water Heat Pump Split Versati SPLIT TYPE (4) The suction temperature is detected by the sensor installed at the suction pipe of the compressor, which is mainly used to control superheating degree. When this sensor fails, this error will be displayed at the controller, all loads except the water pump of the solar system and the electric heater of the water tank will stop.
  • Page 27 Air-to-water Heat Pump Split Versati SPLIT TYPE the leaving water temperature, if this sensor fails, this error will be displayed but the main unit will resume normal operation. (14) Only when the control function of the thermostat has been activated through the wired controller, then the thermostat can switch run modes among cooling, heating and shutdown, otherwise, the unit will run as per the run mode set by the wired controller.

  • Page 28: Control Flowchart

    Air-to-water Heat Pump Split Versati SPLIT TYPE 1.2 Control Flowchart Power Switch On Operation Mode Judgment Cooling Heating Water Heating 3-Way Vavle and 3-Way Vavle and 3-Way Vavle and 2-Way Vavle 2-Way Vavle 2-Way Vavle Control Control Control Water Pump Error Water Pump Error...

  • Page 29: Heating

    Air-to-water Heat Pump Split Versati SPLIT TYPE frequency. Then if it is still detected that the leaving water temperature is lower than the freeze protection temperature, the main unit will stop as per the shutdown frequency but the water pump keeps normal operation. When it is detected that the leaving water temperature of the plate heat exchanger is equal to or larger than the freeze protection withdrawing temperature, freeze protection will exit.

  • Page 30: Shutdown

    Air-to-water Heat Pump Split Versati SPLIT TYPE unit and the 4-way valve will stop. Over-temperature protection will exit when the leaving water temperature is lower than the over-temperature protection temperature. Then, the main unit will resume normal operation. 2.3.2 Water Heating by the Solar System When the solar water heating system is equipped but temperature difference ( it is the difference of solar panel temperature and the actual water tank temperature) for startup is not satisfied, the water pump of the solar system will not start.

  • Page 31: Control The Electronic Expansion Valve

    Air-to-water Heat Pump Split Versati SPLIT TYPE 2.9 Control the Electronic Expansion Valve There are two electronic expansion valves for two-stage throttling control. The opening angle of the first-stage electronic expansion valve is adjusted based on the ratio of readings of the high-pressure sensor, low-pressure sensor and enthalpy-adding sensor.

  • Page 32: Control Panel

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3 Control Panel 3.1 External View (This effect drawing is just for reference) 3.1.1 Keys & Indicating LEDs Symbol Name Functional Description Running indicating LED It will light on/off when the unit is turned on/off. (green) Power indicating LED It will light on/off when the unit is powered on/off.
  • Page 33 Air-to-water Heat Pump Split Versati SPLIT TYPE Symbol Name Functional Description Function key no. 4 Function key no. 3 It is intended to perform different functions at difference pages. Function key no. 2 Function key no. 1 [Note] The key icon is just for reference and the real object always prevails. 3.1.2 Standby Page and Homepage Standby Page Home Page...

  • Page 34: Operation Instructions

    Air-to-water Heat Pump Split Versati SPLIT TYPE Item Functional Description VIEW It is intended to access to the view page. GEN. It is intended to access to the general setting page. [Note] "1*": it includes the “Sanitize mode”, “Quiet” mode, “Auto” mode, “Floor debug” mode, “Emergen.mode”, “Holiday mode”, “Forced Cooling”...
  • Page 35 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.2 Function Setting It enables the user to set each function. [Operation Instructions] (1) At the homepage, by pressing the Function key no. 1 , the control will access to the FUNCTION page 1, as shown in the figure below.
  • Page 36 Air-to-water Heat Pump Split Versati SPLIT TYPE Function Settings Full Name Displayed Name Range Default Remarks Cool Heat When the water tank is Running mode Mode Hot water Heat unavailable, then only “Cool” and setting Cool+Hot water “Heat” are included in the range. Heat+Hot water T-water out / T-water...
  • Page 37 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Range Default Remarks This setting cannot be changed from “Air” to “Air+hot water” directly but via “Without” this option and the unit will go to Without status. Meanwhile, the control will send out “Without”...
  • Page 38 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.2.1 Mode It enables the user to select the run mode of the unit. When the water tank is not prepared, then only Cool and Heat modes are available. When the water tank has been prepared and Water Tank is set to “With” through the wired controller (see Section 3.2.2.26 for more details), then Cool, Heat, Hot water, Heat + hot water, and Cool + hot water modes are available.
  • Page 39 Air-to-water Heat Pump Split Versati SPLIT TYPE [Operation Instructions] After “Floor config” is set to “Without” (see 3.2.2.28), go to the FUNCTION page and locate “T-water ctrl.”, then, configure it through the Up/Down key , “High temp.” or “Low temp.”. [Notes] (a) When this setting is changed, the following parameters will return to the default values.
  • Page 40 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.2.8 Quiet Timer When running noise is too high at some specific timer period, this function enables the unit run quietly at this time period. [Operation Instructions] (1) Go to the FUNCTION page and locate Quiet timer, then, access to the QUIET TIMER setting page. (2) At the QUIET TIMER setting page, select “Start time”...
  • Page 41 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.2.10 Holiday Release In summer or high-temperature season, this function will make the unit pause to run in some specific periods when the user is out. [Operation Instructions] Go to the FUNCTION page and locate “Holiday release”, then, configure it through the Up/Down key , “On”...
  • Page 42 Air-to-water Heat Pump Split Versati SPLIT TYPE (e) When Sanitize is activated, “Disinfection” will show on the home page of the control until this operation is finished. If this operation fails, “Disinfect fail” will show. In this case, by pressing any key, “Disinfect fail” will be cleared or it will be always there.
  • Page 43 Air-to-water Heat Pump Split Versati SPLIT TYPE (4) When above settings are finished, pressing the Return key and then pressing “Save”, a pop-up window will pop up to remind if you are determined to save these settings. If so, press the OK key .
  • Page 44 Air-to-water Heat Pump Split Versati SPLIT TYPE (e) Temperature Setpoint The control is able to decide the temperature type and temperature range based on the current “Clock Timer”, “Floor config”, “T-water Ctrl.”, and “Ctrl. state” settings. See the followings for more details. If the set mode is “Hot water”, the temperature set point shows nothing, indicating there is no need to set “T-water out”...
  • Page 45 Air-to-water Heat Pump Split Versati SPLIT TYPE (4) When the setting is finished, save it by pressing the Function key no. 2 , or this setting without being saved is ineffective. (5) When the setting has been saved, activate the “Clock Timer” at the FUNCTION page. [Notes] (a) When “Weekly timer”...
  • Page 46 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.2.15 Solar kit When the solar system is prepared (water tank and solar heater both are set to “with”), this function will decide which period to let the solar system to run. However, if the solar system will run virtually depends on the temperature difference between the solar panel and the water tank.
  • Page 47 Air-to-water Heat Pump Split Versati SPLIT TYPE (2) At the FLOOR DEBUG setting page, by the Left/Right key select the desired parameter and then by the Up/Down key configure it. The configurable parameters include “Segments”, “Period 1 temp”, “ΔT of segment”, and “Segment time”, as listed in the following table. Full Name Displayed Name Range...
  • Page 48 Air-to-water Heat Pump Split Versati SPLIT TYPE Segments ΔT Period 1 Temp Segment Time Floor Debug 3.2.2.17 Emergency Mode (Emergen. Mode) When the compressor fails to run owing to some urgent condition, this function will allow the unit to run in the “Heat”...
  • Page 49 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.2.18 Holiday Mode In winter or low-temperature season, this function will control the leaving water temperature or room temperature within a certain range to avoid the water system from being frozen when the user is out on holiday for a long time. [Operation Instructions] (1) Locate where “Holiday mode”...
  • Page 50 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.2.21 Other Heater It can be configured to “With” or “Without” through the wired controller. [Operation Instructions] Go to the FUNCTION page and locate Other heater, then, configure it through the Up/Down key “With”...
  • Page 51 Air-to-water Heat Pump Split Versati SPLIT TYPE [Operation Instructions] Go to the FUNCTION page and locate “Water tank”, then, configure it through the Up/Down key , “1” or “2”. When the water tank is unavailable, this option will be reserved. [Notes] It will be memorized upon power failure.
  • Page 52 Air-to-water Heat Pump Split Versati SPLIT TYPE [Notes] (a) It will not be memorized upon power failure. (b) It can be set only when the unit is turned off. 3.2.2.31 Address It is used to identify the unit in use in the central control system. [Operation Instructions] Go to the FUNCTION page and locate “Address”, then, configure it through the Up/Down key to set...
  • Page 53 Air-to-water Heat Pump Split Versati SPLIT TYPE (3) When the setting is finished, press “Save” and a dialog box will pop up, reminding “Save settings?”. If so, press the OK key ; if not press the Cancel key to not save this setting. [Notes] (a) For those parameter which default value vary by different condition, the value will set to default when the condition changes.
  • Page 54 Air-to-water Heat Pump Split Versati SPLIT TYPE Displayed Full Name Range(°C) Range(°F) Default Name 48°C/118°F[High temp.] Upper limit water-out 115~131°F[High temp.] 35°C/95°F[Low temp.] temperature at the Upper WT- 46~55°C[High temp.] 86~95°F Set to default value when Weather-dependent Heat 30~35°C[Normal temp.] [Normal temp.] the Weather-dependent Mode for heating...
  • Page 55 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.3.2 Weather-dependent Parameter Group (1) In heating mode, T-water out Ctrl.state, Normal temp. Water-out temp./℃ (x1,y1) Upper WT-Heat (x2,y2) Lower WT-Heat Upper AT-Heat Lower AT-Heat -20 -15 -10 Ambient temp./℃ x1: Lower AT-Heat, -20~5 ℃ (-4~41°F), default -15 ℃ (5°F); y1: Upper WT-Heat, 30~35 ℃ (86~95°F), default 35℃...
  • Page 56 Air-to-water Heat Pump Split Versati SPLIT TYPE At the view pages, the user is enabled to view the unit’s running state, running parameters, errors, version of the wired controller etc. [Operation Instructions] At the homepage, by pressing the Function key no.3 , it is able to go to the VIEW page as shown in the figure below.
  • Page 57 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Status Chassis heater running state Chassis heater On/Off Reserved Reserved Reserved Defrost Defrost On/Off Oil return Oil return On/Off Thermostat Thermostat Off/Cool/Heat Assistant heater running state Assist. Heater On/Off Circulating two-way valve 1 running state 2-way valve 1 On/Off...
  • Page 58 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Remote room temperature T-remote room Solor kit-entering water temp T-SL water I Solor kit-leaving water temp T-SL water O Solar panel temp T-SL panel Discharge pressure Dis.pressure Reserved Reserved Reserved Reserved Target temperature for Weather-dependent Mode...
  • Page 59 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Error Code Ambient temperature sensor error Ambient sensor Defrost temperature sensor error Defro. sensor Discharge temperature sensor error Disch. sensor Suction temperature sensor error Suction sensor Outdoor fan error Outdoor fan Compressor internal overload protection Comp.
  • Page 60 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Error Code Drive module resetting Driver reset Compressor over-current Com. over-cur. Overspeed Overspeed Sensing circuit error or current sensor error Current sen. Desynchronizing Desynchronize Compressor stalling Comp. stalling Radiator or IPM or PFC module overtemperature Overtemp.-mod.
  • Page 61 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.5 General Setting At the general setting pages, the user is enabled to configure general parameters, like temperature unit, language, On/off memory, time & date, etc. [Operation Instructions] At the homepage, by pressing “GEN.” access to the GENERAL SET page.
  • Page 62 Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2.5.1 Time & Date [Operation Instructions] At the homepage, by pressing “GEN.” access to the GENERAL SET page. Then, select “Time & Date” at this page. After that, go to the “Time & Date” setting page by pressing the OK key Change the set value by pressing the Up/Down key .

  • Page 63: Unit Installation

    Air-to-water Heat Pump Split Versati SPLIT TYPE UNIT INSTALLATION 1 Installation Guides WARNING • Installation should be performed by GREE appointed personnel, or improper installation would lead to unusual operation, water leakage, electric shock or fire hazard. • The unit should be installed on the foundation which is capable of supporting the unit, or the unit would fall off or even lead to personal injury.

  • Page 64: Installation Positions Of The Indoor Unit

    Air-to-water Heat Pump Split Versati SPLIT TYPE 1.2 Installation Positions of the Indoor Unit (1) Avoid direct sunshine. (2) Ensure the hanger rod, ceiling and building structure have sufficient strength to support the weight of air conditioner unit. (3) Drainage pipe is easy to connect out. (4) Indoor and outdoor connection pipes are easy to go outdoors.

  • Page 65: Service Tools

    Air-to-water Heat Pump Split Versati SPLIT TYPE Usage Name Picture Water manifold It is used to distribute water. Pipe and Pipe It is used to connect the water pipes. Joint Cut-off Valve It is used to cut off or get through the waterway. 3 Service Tools Name Image...

  • Page 66: Installation Instructions

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4 Installation Instructions 4.1 Installation Examples CASE 1:Connecting Under-floor Coil for Heating and Cooling Underfloor coil Indoor unit Outdoor unit Radiator FCU 1 FCU 2 Remote room thermostat 2-way valve (Field supplied) (Field supplied) By-pass valve Control line (Field supplied)

  • Page 67: Pre-Installation

    Air-to-water Heat Pump Split Versati SPLIT TYPE (b) In this case, the three-way valve should be installed and should comply with installation of this manual. (c) When the FCU and the underfloor coil are used at the same time, performance of the underfloor coil is satisfied firstly.

  • Page 68: Installation Of Outdoor Unit

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.3.2 Select installation location of indoor unit (1) Avoid direct sunshine. (2) Ensure the hanger rod, ceiling and building structure have sufficient strength to support the weight of air conditioner unit. (3) Drainage pipe is easy to connect out. (4) Indoor and outdoor connection pipes are easy to go outdoors.

  • Page 69: Installation Of Indoor Unit

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.4.2 Space requirements for installation Unit: mm (inch) 4.4.3 Precautions on installation of outdoor unit (1) When moving the outdoor unit, it is necessary to adopt 2 pieces of long enough rope to hand the unit from 4 directions.
  • Page 70 Air-to-water Heat Pump Split Versati SPLIT TYPE Step2:Releasing screws, detach front cover from the indoor unit. Step3: Attaching indoor unit to the wall make use of accessory expansion bolt. Expansion bolt Wall Note NOTE • While lifting the indoor unit, at least two persons should join together. Weight of the indoor unit is more than 110.25lb/50kg.
  • Page 71 Air-to-water Heat Pump Split Versati SPLIT TYPE 4.5.2 Outline Dimension of Indoor Unit Unit: mm (inch) 324 (12-3/4) 500 (19-11/16) Unit: inch Name Remarks Leaving Water Pipe 1″Male BSP Returning Water Pipe 1″Male BSP Gas-side Pipe GRS-CQ16Pd/NaE-D Liquid-side Pipe GRS-CQ16Pd/NaE-D 4.5.3 Space requirements for installation Unit: mm (inch) 250 (9-13/16)
  • Page 72 Air-to-water Heat Pump Split Versati SPLIT TYPE 4.5.4 Precautions on installation of indoor unit (1) Indoor unit shall be vertically mounted on the wall of the room with expansion bolt. (2) Keep the indoor unit away from heat sources like heat sink and so on in the room as much as possible. (3) Keep the indoor unit as close as possible to outdoor unit.

  • Page 73: Connection Of Pipeline

    Air-to-water Heat Pump Split Versati SPLIT TYPE Water expansion factor in different temperature Temperature(°F/°C) Expansion factor e 113/45 0.0099 122/50 0.0121 131/55 0.0145 140/60 0.0171 149/65 0.0198 158/70 0.0227 167/75 0.0258 176/80 0.029 185/85 0.0324 194/90 0.0359 203/95 0.0396 212/100 0.0434 4.6 Connection of Pipeline 4.6.1 Connection of Outlet Pipe for Indoor &...
  • Page 74 Air-to-water Heat Pump Split Versati SPLIT TYPE After completing the protection work and wrapping the pipe properly, close the wall holes with sealing • materials. No clearance Indoor unit Outdoor unit Indoor unit Outdoor unit Outdoor unit Indoor unit Oil trap Pipe size (Diameter:Φ) Length B (m/ft) Elevation A (m/ft)

  • Page 75: Installation Of Insulated Water Tank

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.7 Installation of Insulated Water Tank 4.7.1 Installation measure The insulated water tank should be installed and keep levelly within 5m/16.40ft and vertically within 3m/9.84ft from the indoor unit. It can be installed in the room. Standing water tank must be installed vertically with the bottom on the ground, never suspended.
  • Page 76 Air-to-water Heat Pump Split Versati SPLIT TYPE (3) Installation of circulating water inlet/outlet pipes: connect the water inlet of the unit with circulating outlet of water tank and water outlet of unit with circulating inlet of water tank. (4) Installation of water inlet/outlet pipes of the water tank: safety check valve, filter and cut-off valve must be installed for the water inlet pipe according to the installation sketch of the unit.

  • Page 77: Electric Wiring

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.8 Electric Wiring 4.8.1 Wiring principle (1) Wires, equipment and connectors supplied for use on the site must be in compliance with provisions of regulations and engineering requirements. (2) Only electricians holding qualification are allowed to perform wire connection on the site. (3) Before connection work is started, the power supply must be shut off.

  • Page 78: Wiring Diagram

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.9 Wiring Diagram 4.9.1 Control Board (1) Main Board (AP2): GRS-CQ16Pd/NaE-D(O) AC_N AC_L VA-1 HEAT H-PRESS COM-ESPE2 PWR1 DC-MOTOR0 T-SENSOR3 DC-MOTOR1 T-SENSOR2 Silk Screen Specification AC_N Neutral wire input of power supply AC_L Live wire input of power supply 4-way valve VA-1...
  • Page 79 Air-to-water Heat Pump Split Versati SPLIT TYPE (2) Main Board (AP1):GRS-CQ16Pd/NaE-D(I) OTHER_HEAT OTHER_HEAT 3V1_OFF 3V2_OFF 3V1_OFF 3V2_OFF 2V2_OFF 2V2_OFF HEAT2 2V1_OFF 2V1_OFF OTHER_HETA_DCOUT OTHER_HETA_DCOUT 3V1_ON 3V1_ON WT_HEAT WT_HEAT HEAT1 BAN_HEAT 2V1_ON 2V1_ON 3V2_ON 3V2_ON 2V2_ON 2V2_ON AC-L ERR RUN ERR RUN PUMP2 PUMP2 PUMP1...
  • Page 80 Air-to-water Heat Pump Split Versati SPLIT TYPE Silk Screan Location Introduction T-SEN11 CN15 Remote room temp sensor1 T-SEN4 CN20 Reserved T-SEN2 CN21 Reserved T-SEN3 CN22 Reserved T-SEN10 CN24 Solar water-in temp sensor T-SEN7 CN29 Solar water-out temp sensor T-SEN9 CN30 Solar board temp sensor T-SEN8 CN32...
  • Page 81 Air-to-water Heat Pump Split Versati SPLIT TYPE Silk Screan Location Introduction 3V2_ON Electric magnetic 3-way valve 2 is normally open 3V2_OFF Electric magnetic 3-way valve 2 is normally closed INDOOR_PUMP Control of the water pump for the main unit Reserved SOLAR_PUMP Control of the water pump for solar system (3) Drive Board (AP4):GRS-CQ16Pd/NaE-D(O)
  • Page 82 Air-to-water Heat Pump Split Versati SPLIT TYPE (4) Filter Board (AP3):GRS-CQ16Pd/NaE-D(O) N-OUT AC-N L-OUT AC-L Silk Screen Introduction AC-N Neutral line of the power supply for the main unit AC-L Live line of the power supply for the main unit Neutral line output of the filter board (to the drive board) N-OUT Neutral line output of the filter board (to the main board )
  • Page 83 Air-to-water Heat Pump Split Versati SPLIT TYPE 4.9.2 Electric Wiring Refer to Section 4.8. for wiring principle. The wiring diagram stuck to the unit always prevails. (1) Wiring diagram: indoor unit GRS-CQ16Pd/NaE-D(I) at field. (2) Wiring diagram: outdoor unit GRS-CQ16Pd/NaE-D(O)

  • Page 84: Wiring Of The Terminal Board

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.10 Wiring of the Terminal Board GRS-CQ16Pd/NaE-D(I) 4.11 Wiring of the 2-Way Valve The 2-way valve 1 is required to control water flow for cooling or heating operation. The role of 2-way valve 1 is to cut off water flow into the underfloor loop when the fan coil unit is equipped for cooling operation.

  • Page 85: Wiring Of The 3-Way Valve

    Air-to-water Heat Pump Split Versati SPLIT TYPE 2-Way Valve 1 WARNING (1) Normal Open type should be connected to wire (OFF) and wire (N) for valve closing in cooling mode. (2) Normal Closed type should be connected to wire (ON) and wire (N) for valve closing in cooling mode. (ON): Live signal (for Normal Open type) from PCB to 2-way valve (OFF): Live signal (for Normal Closed type) from PCB to 2-way valve (N): Neutral signal from PCB to 2-way valve...

  • Page 86: Wiring Of Other Auxiliary Heat Sources

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.13 Wiring of Other Auxiliary Heat Sources Other auxiliary heat sources are allowed for the equipment and controlled in such a way that the mainboard will output 230V when outdoor temperature is lower than the set point for startup of the auxiliary heat source. Other Thermal 4.14 Wiring of the Gate-Controller If there is gate control function, installation guide follow as:...

  • Page 87: Wiring Of The Thermostat

    Air-to-water Heat Pump Split Versati SPLIT TYPE Remote Air Environmen t CN15 Temp sensor Electric box Notes: (a) Distance between the indoor unit and the remote air temperature sensor should be less than 15m(49.21ft) due to length of the connection cable of remote air temperature sensor; (b) Height from floor is approximately 1.5m(4.92ft);...

  • Page 88: Wiring Of The Control

    Air-to-water Heat Pump Split Versati SPLIT TYPE 50~86°F/10~30°C, by means of Directly onto the wall or wall-box (mounting screws Setpoint range Mounting a large setpoint dial supplied) Up to 9 screw-in terminals per unit, capable of Supply voltage 230V, 50/60Hz Wiring accepting wires up to 1.5mm Thermostat switch S.P.
  • Page 89 Air-to-water Heat Pump Split Versati SPLIT TYPE...
  • Page 90 Air-to-water Heat Pump Split Versati SPLIT TYPE Notes (a) The wired controller can be connected to the terminal of AP1 CN6 through the four-wire communication line. (b) AP1 (CN 5) and AP2 (CN 7) have been connected with the communication line (three-wire communication line before delivery.

  • Page 91: Commissioning And Trial Run

    Air-to-water Heat Pump Split Versati SPLIT TYPE 5 Commissioning and Trial Run 5.1 Check before Startup For safety of users and unit, the unit must be started up for check before commissioning. The procedures are as below: The following items shall be performed by qualified maintenance personnel. Confirm together with the sales engineer, dealer, installing contractor and customers for the following items finished or to be finished.

  • Page 92: Trial Run

    Air-to-water Heat Pump Split Versati SPLIT TYPE 5.2 Trial Run Trial run is testing whether the unit can run normally via preoperation. If the unit cannot run normally, find and trial solve problems until the run is satisfactory. All inspections must meet the requirements before performing the trial Trial run.

  • Page 93: Test Operation & Troubleshooting & Maintenance

    Air-to-water Heat Pump Split Versati SPLIT TYPE TEST OPERATION & TROUBLESHOOTING & MAINTENANCE 1 Pre-check 1.1 Check for Wiring NOTE • Do not check for the power supply unless proper checkout equipment has prepared and preventive measures have been taken, otherwise it would lead to severe injury. (1) Are sizes of connection lines and the air switch proper? (2) Does wiring comply with relative standards and electric codes? (3) Is there any incorrect wiring?

  • Page 94: Check For The Communication System

    Air-to-water Heat Pump Split Versati SPLIT TYPE Requirements for Water Makeup ◆ Make up water from the tap water pipe to the return water pipe and meanwhile open the air vent cap until the water system is full and no air is trapped. The gage pressure requirement for makeup water is 2.0~2.5bar.

  • Page 95: Trial Run

    Air-to-water Heat Pump Split Versati SPLIT TYPE 1.4 Trial Run Start the unit when there is no any problem for wiring and piping. After startup, check for the electronic expansion valve, water pump, fan, and compressor to see if they work normally. When there is any error, solve it according to the troubleshooting flowchart covered in this manual.
  • Page 96 Air-to-water Heat Pump Split Versati SPLIT TYPE IPM defective IPM defective PFC defective FPC defective Start failure Start failure Phase loss Phase loss Communication error drive-main com. Drive module resetting Driver reset Compressor over-current Com. over-cur. Overspeed Overspeed Sensing circuit error or current sensor error Current sen.

  • Page 97: Flow Chart Of Troubleshooting

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3 Flow Chart of Troubleshooting 3.1 Compressor High-pressure Protection E1 Comp High-pressure protection E1 Replace the High-pressure Check if the High-pressure switch switch is broken Check if the High-pressure switch Replace the wiring wiring is loose.

  • Page 98: Compressor Low- Pressure Protection E3

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2 Compressor Low- pressure Protection E3 Comp Low-pressure Protection E3 Replace comp Check if comp low-pressure switch low- pressure or rewire is broken or the wiring is loose. Check the fans Check if the fans stop running or reverse Repair the leakage of system pipe and add refrigerant Check if the system has leaked...

  • Page 99: Overload Protection Of Compressor Or Driver Error

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.4 Overload Protection of Compressor or Driver Error Comp Overload Protection Check if the AC Replace the AC contactor contactor is damaged Adjust the Check if the compressor compressor wiring wiring is correct Contact the power Check if the voltage is normal supply company...

  • Page 100: Temperature Sensor Error

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.6 Temperature Sensor Error Temperature Sensor Error Check if the plug Check the orientation on temperature sensor is correctly of plug and socket connected to the socket. Check if the resistance of Replace the temperature sensor is correct.

  • Page 101: Capacity Switch Error (Code:"E5")

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.8 Capacity Switch Error (Code:"C5") E5 is displayed on the wired controller Is the jumper Connect the jumper connected ? Is the number Connect the right of the jumper jumper right ? Is the jumper Tighten the jumper loose ? Replace the...
  • Page 102 Air-to-water Heat Pump Split Versati SPLIT TYPE IPM or PFC Over-temperature Protection(Code:"P8") ◆ “Overtemp.-mod.” is displayed on the wired controller P8 is displayed in the mainboard 88 Indicating Lamp Is the IPM or PFC module of the driver board AP4 tightened ? Tighten the IPM or Replace the...
  • Page 103 Air-to-water Heat Pump Split Versati SPLIT TYPE Drive-to-main-control Communication Error(Code:"P6") ◆ “Drive-main com.” is Displayed on the wired controller P6 is displayed in the mainboard 88 Indicating Lamp Is the CPU tightened? Replace Tighten the CPU the driver board AP4 Work Normally Compressor Startup Failure(code:"LC") ◆...
  • Page 104 Air-to-water Heat Pump Split Versati SPLIT TYPE Compressor Current Protection (Code:"P5"); Compressor Motor Desynchronizing (Code:"H7"); IPM ◆ Protection (Code:"H5"); Phase Loss (Code:"LD") “Com. over-curr.”, “Desynchronize”, “IPM defective” or “Phase loss” is Displayed on the wired controller P5、H7、H5 or LD is displayed in the mainboard 88 indicating lamp Is the...

  • Page 105: Daily Maintenance And Repair

    Air-to-water Heat Pump Split Versati SPLIT TYPE 5 Daily Maintenance and Repair 5.1 Daily Maintenance In order to avoid damage of unit, all protecting devices in the unit had been set before outgoing, so the user can never adjust or remove them. For the first startup of the unit or next startup of unit after long-period stop (above 1 day) by cutting off the power, please electrify the unit in advance to preheat the unit for more than 8hr Never put sundries on the unit and accessories.

  • Page 106: Repair

    Air-to-water Heat Pump Split Versati SPLIT TYPE Malfunctions Reasons Troubleshooting 1.Enhance heat insulation efficiency of the 1.Poor heat insulation of water system. system. Poor efficiency of 2.Poor heat exchange of evaporator. 2.Check if air in or out of unit is normal and clean hot water heating 3.Poor refrigerant of unit.
  • Page 107 Air-to-water Heat Pump Split Versati SPLIT TYPE Picture Name Function It is used to prevent the heat exchanger from being frozen owing to reduced water flow rate. When the flow rate goes Flow Switch down to the point at which the flow switch will act, the switch will trip off and the unit will raise an alarm and shut down.
  • Page 108 Air-to-water Heat Pump Split Versati SPLIT TYPE WARNING • When charging is interrupted or finished, reinspect the unit but do not let the compressor run into operation. NOTE • Do not use mixture of refrigerant vapor and air or oxygen for pressurizing for fear of explosion.
  • Page 109 Add: 3400 Industriel Blvd, Sherbrooke, QC Canada J1L 1V8 Tel: (819) 346-8493 E-mail: support@dettson.ca www.dettson.ca For continuous improvement in the products,Dettson reserves the right to modify the product specification and appearance in this manual without notice and without incurring any obligation. X62433B...

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