CTC Union EcoZenith i255 Installation And Maintenance Manual
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CTC Union EcoZenith i255 Installation And Maintenance Manual

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Installation and Maintenance Manual
CTC EcoZenith i255
400V 3N~/ 230V 1N~/ 230V 3~
Important!
• Read carefully before use,
keep for future reference.
• Translation of the original
instructions.
162 505 67-5 CR00678 2024-01-22

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Summary of Contents for CTC Union EcoZenith i255

  • Page 1 Installation and Maintenance Manual CTC EcoZenith i255 400V 3N~/ 230V 1N~/ 230V 3~ Important! • Read carefully before use, keep for future reference. • Translation of the original instructions. 162 505 67-5 CR00678 2024-01-22...

  • Page 2: Table Of Contents

    13.2 Positioning of electrical components ........99 Function description ............17 13.3 Electrical connection to heat pump ........100 Parameter list EcoZenith i255...........18 13.4 Extra low voltage protection ...........102 13.5 Settings to be carried out by the installation electrician ..104 Control system ..............20 13.6 Connection of pump (G46) to Differential thermostat...

  • Page 3: Congratulations On Your New Product

    Congratulations on your new product! You have just purchased a CTC EcoZenith i255, with which we hope you will be very pleased. Read about how you can take care of your boiler on the following pages. Save this manual containing the installation and maintenance instructions. If it is properly maintained, you will be able to enjoy the use of your CTC EcoZenith i255 for many years.
  • Page 4 Important to remember! Check the following points at the time of delivery and installation: • The product must be transported and stored in an upright position. If these instructions are When moving the product, it can be placed temporarily on its back. not followed during the •...

  • Page 5: Safety Instructions

    Safety instructions Turn off the power with an omnipolar switch before doing any work on the product. The product must be connected to protective earth. The product is classified as IPX1. The product must not be rinsed with water. When handling the product with a hoist ring or similar device, make sure that the lifting equipment, eyebolts and other parts are not damaged.

  • Page 6: Installation

    Take your time going through functions and settings with the property owner and answer any questions. Both you and the CTC EcoZenith i255 benefit from a user who has completely understood how the system operates and should be maintained.

  • Page 7: Control Functions (Std.) And With Expansion Card

    Control functions (std.) and with expansion card The product is supplied from the factory with control functions according to "Basic functions" below. Supplementing with the expansion card accessory (A3) adds solar control and its variants as well as bore hole recharging and various tanks. In addition, DHW circulation and pool control are also included.
  • Page 8 Following installation, the unit must be inspected, functional checks performed and the customer informed. The points below must be checked off: Pipe installation CTC EcoZenith i255 filled, positioned and adjusted in the correct manner according to the instructions. † †...

  • Page 9: Your Home's Heating Installation

    Your home's heating installation The House Heating Curve The heating curve is the central part of the product’s control system. It is the heating curve which determines For more information on how to set the the compensated flow temperature requirements for your heating curve, see section ”Heating curve”...
  • Page 10 Appropriate Default Values During installation you can seldom achieve a precise setting for the heating curve instantly. In this case, the values given below may provide a good starting point. Radiators with small heat-emission surfaces require a higher primary flow temperature. You can adjust the gradient (heating curve gradient) for your heating system under the "Installer / Settings ...
  • Page 11 Examples of Heating Curves You can see in the diagram below how the heating curve changes with different Inclination settings. The gradient of the curve shows the temperatures that the radiators require at different outdoor temperatures. Curve Inclination Primary Flow Temperature The inclination value which is set is the primary flow temperature when the outside temperature is –15 °C.
  • Page 12 Heating Summer season Primary Flow Temperature switched off ºC All properties have internal heat gains (lamps, oven, Heating up body heat, etc.), which means that the heating can be switched off when the outdoor temperature is lower than the desired room temperature. The better insulated the house is, the earlier the heating from the heat pump can be switched off.

  • Page 13: Technical Data

    Technical data Table 400V 3N~ Electrical Data CTC EcoZenith i255 H CTC EcoZenith i255 L Electrical data 400V 3N~ 50Hz Rated power (switching) 15 (18) Group fuse 15 kW: 25 (18 kW: 32) Immersion heater, upper (adjustable, steps of 0.3 kW) 0.3-9.0...
  • Page 14 Table 230V 1N~/230V 3~ CTC EcoZenith i255 L CTC EcoZenith i255 L Electrical Data 1 x 230V 3 x 230V Electrical data 230V 1N~ 50Hz 230V 3~ 50Hz Rated power Group fuse Immersion heater, upper (adjustable) 2 - 9 1.2 - 7.05 (0/2/3/4/5/6/7/9) (0/1.2/2.4/3.5/4.6/5.8/7.05)

  • Page 15: Measurements

    Measurements Low Model - CTC EcoZenit i255L High Model - CTC EcoZenit i255H Erforderlig reshöjd: 1628mm då ställfot har min Erforderlig reshöjd: 1628mm då st 80,50 80,50 Reservdelsstruktur: 586767008 Re Reservdelss Distr till/Antal Distr till/Antal Ytjämnhet RA Ytjämnhet RA 80,50 Skala Skala 1:20...
  • Page 16 Top view Bleeding Safety/connection waste pipe 3/4” 22 Cold water connection Ø22 DHW Ø22 Radiator primary flow clamp ring Ø22 Radiator return Ø22 /expansion connection From heat pump Ø22 (CTC EcoZenith i255L) To heat pump Ø22 (CTC EcoZenith i255L) Lifting sleeve 3/4" BSP Socket for connecting external systems/EnergyFlex (behind the front plate)

  • Page 17: Function Description

    Function description The picture below shows the basic construction of CTC EcoZenith i255. If a heat pump is connected, the energy in the air or bedrock/ground is drawn up by the cooling system. The compressor then increases the temperature to a usable level.

  • Page 18: Parameter List Ecozenith I255

    Parameter list EcoZenith i255 The tables show factory settings for important product parameters. Factory setting Factory setting Heating circuit Heat pump Program Economy Compressor Permitted Room temp change °C Stop at outdoor temp °C -2.0 Off delay, min Tariff HP...

  • Page 19: Program Economy

    Factory setting Upper tank Program Economy Stop temp HP °C Boiler upper °C Program Normal Stop temp HP °C Boiler upper °C Program Comfort Stop temp HP °C Boiler upper °C Start/stop diff. upper °C Max time upper tank (min) Max time lower tank (min) SmartGrid Blocking ºC SmartGrid Low price °C...

  • Page 20: Control System

    Heat pump On delivery the CTC EcoZenith i255 is ready for connection to a CTC heat pump – This means that the control system already contains all the controls for the heat pump. When the heat pump has been defined (On), CTC EcoZenith i255 senses which heat pump has been connected.

  • Page 21: Quick Start Touchscreen

    Quick start touchscreen The illustration below shows the most common functions you need to set and use as the end customer. Start menu increase value Scroll & Swipe Single click = Select Back Select and save Double click = Open decrease increase decrease value...
  • Page 22 Schedule "Extra DHW" Tip: Set the time approx. 1 hour earlier than when you need the hot water as it may take some time to heat. Start Extra DHW Timer Select DHW program Economy – Small DHW requirement Normal – Normal DHW requirement Comfort –...

  • Page 23: Installation Wizard

    Installation wizard When starting up the system and during reinstallation (refer to the "Installer /Service" chapter), a number of system options must be selected. The dialogue boxes which will then be displayed are described below. The values shown in the menu screenshots below are only examples. 1.

  • Page 24: Detailed Menu Descriptions

    Detailed menu descriptions All settings can be configured directly on-screen using the easy-to-read control panel. Operational and temperature information is also displayed here. You can easily enter the different menus to find information on the operation or to set your own values. For information about start-up and re- installation, refer to the "First Start"...

  • Page 25: Heating/Cooling

    Heating/Cooling In the menu "HC- Heating/Cooling" the following settings can be made: 9.3.1 Setpoint setting with room sensor Set the desired room temperature (set point) with the "minus" and "plus" buttons. In the example in the "HC1 Heating/Cooling" menu, the "Economy" programme and "Holiday mode"...
  • Page 26 9.3.2 Program Press the "Program" button and the heating program to be activated (Economy, Normal, Comfort or Custom). It is also possible to schedule the programmes. See chapter "Installer/Settings/Heating circuit/Program" for information on how to set temperature increases/ decreases and delay times for the programs. 9.3.3 Heating curve Press the heating curve symbol in the "HC1- Heating/...
  • Page 27 9.3.5 Room temperature setting without room sensor You can select “Room sensor - No” in the “Installer/ Define/Heating circuit” menu. This is used if the room sensor is difficult to place, if the underfloor heating system control has its own room sensor or if you are using a wood-burning stove/fireplace.
  • Page 28 9.3.7 Night Reduction Temperature Night reduction means reducing the temperature indoors, via remote control or during scheduled periods. In the menu ”HC1 Night reduction” menu, the periods during the week for night temperature reduction can be scheduled. The ”Night reduction” icon in the ”Heating/Cooling” menu only appears if a ”Schedule”...

  • Page 29: Dhw

    This menu is used to set the hot water comfort level and "Extra DHW". Extra DHW The "Extra DHW" function can be activated here. When the function is activated (by setting the number of hours using the plus sign in the "Hot Water" menu), the heat pump immediately starts to produce extra DHW.

  • Page 30: Schedule

    Schedule In a Schedule, the periods can be set for when a function should be active or inactive during the weekdays. The system does not allow certain functions to be active at the same time on the same schedule; for example, the “Night Reduction”...
  • Page 31 9.6.3 Editing a schedule Go down to the first row and press "OK" to enable editing mode. Time Use the arrow keys to change the time (hours and minutes, respectively). Day by day Use the arrow keys (up arrow /down arrow) to mark active days in bold.

  • Page 32: Operation Data

    Operation data The screen shows operational data with the CTC EcoAir connected. The screen shows operating information with the CTC EcoPart When the pumps are in operation, the pump icons also rotate on connected. When the pumps are in operation, the pump icons also screen.
  • Page 33 9.7.1 Operation data, Control unit Status HP upper Current charging mode, see table below. Tank upper °C 49 (60) Temperature and setpoint in the upper part of the tank. Tank lower °C 42 (50) Temperature and setpoint in the lower part of the tank. Electric power kW 0.0 + 2.5 Main menu page for operation data of the defined system.
  • Page 34 9.7.2 Operation data, Heating circuit* Mode Custom Shows the active DHW program. Status Heating Shows the operational status of the heating circuit. See the table below. Primary flow °C 42 (48) Temperature and setpoint (in brackets) supplied to heating circuit. "Operation data, heating circuit"...
  • Page 35 9.7.3 Operation data, Heat pump (air-to- water) Status On, heating Heat pump status, see table below. Model EcoAir 622M Shows the heat pump model. Compressor 65RPS Shows the compressor speed. "R" stands for "Reduced Mode" (for example, during "Silent Mode"). Charge pump Shows operating status of the charge pump ("On"...
  • Page 36 9.7.4 Operation data, Heat pump (brine- to-water) Status On, heating Heat pump status, see table below. Model EcoPart 410 Shows model of selected heat pump. Compressor On (On/Off) Shows whether the compressor is operating or not. Charge pump Shows operating status of the charge pump ("On" or The menu shows detailed operation data of the selected heat pump.

  • Page 37: Max Primary Flow °C

    9.7.5 Stored Operation data This menu shows cumulative operation values. The operation values shown in the menu screenshots are only examples. The historical operational info presented varies depending on the language choice. Total operation time h 3500 Shows the total time the product has been powered. Max primary flow °C Shows the highest temperature that has been supplied to Menu: "Stored oper.
  • Page 38 9.7.8 Operation data, El.prices This menu is displayed if ”El.prices” has been defined in the ”Installer/Define/Communication” menu. El.price mode High Indicates the current price category (”High”, ”Medium” or ”Low”). El.price/kWh SEK 7.5 Indicates the current electricity price in local currency. Menu: "Operation/El.prices".

  • Page 39: Display

    Installer This menu contains four sub-menus: • Display • Settings Define • • Service For "System Information", click the "i" button in the lower right corner of the screen in the "Installer" menu. This displays the product serial number, MAC address, Menu: "Installer".
  • Page 40 9.8.2 Language Click a flag to select the language. The language selected is highlighted with a green square. To view more language options than those shown in the menu, scroll down the page, or press the down arrow key. 9.8.3 Country Click on the ”Country”...

  • Page 41: Settings

    Settings This is used to set the parameters for your home’s heating requirements. It is important that this basic setting is right for your home. Values which are set incorrectly may mean that your property is not warm enough or that an unnecessarily large amount of energy is being used to heat your property.
  • Page 42 Program Press ”OK” on the ”Program” menu bar to make settings for the ”Economy”, ”Comfort” and ”Custom” heating programs. Selected programme is marked with an ”X”. To activate a heating program or set a schedule, press the ”Program” button from the ”Heating/Cooling” menu. See chapter ”Control system / heating/cooling”.
  • Page 43 Heating curve The heating curve determines the primary flow temperature (and thus the indoor temperature) to the heating circuit at different outdoor temperatures. See chapter ”Your home’s heating installation” for more information on adjusting the heating curve. Possible choices are ”Set. heating curve”, ”Fine adjustment”, ”Active curve”, ”Copy from ...”...

  • Page 44: Min Primary Flow °C Off

    Max primary flow °C 60 (30...70) Maximum permitted temperature supplied to the respective heating circuit. Min primary flow °C Off (Off/15...65) Minimum permitted temperature supplied to the respective heating circuit. Heating mode Auto (Auto/On/Off) Switching between heating season and summer mode can take place automatically (Auto) or a selection can be made here to set the heating to "On"...

  • Page 45: Night Reduction Down To °C

    Night reduction down to °C 5 (-40...40) When the outdoor temperature is lower than this, the "Night Reduction" function stops since too much energy is consumed and it takes too long to increase the temperature again. This menu overrides remote control of "Night Reduction". Room temp.

  • Page 46: Drying Period Temp °C

    Anti Water Hammer No (No/Yes) Anti Water Hammer means that the heat pump never switches over and heats the upper tank (DHW charging). This is provided solely by the immersion heater. In summer mode however, i.e. if the outdoor temperature is above the limit (Heating off, outdoor), the heat pump will be allowed to send water to the upper tank.

  • Page 47: Stop At Outdoor Temp

    9.9.2 Settings Heat pump Compressor Blocked (Permitted/Blocked) The heat pump is supplied with a blocked compressor. "Permitted" means that the compressor can start. Stop at outdoor temp °C -22 (-22...10) This menu relates to settings for the outdoor temperature at which the compressor is no longer permitted to operate.

  • Page 48: Ext. Noise Reduction Rps

    Ext. noise reduction RPS 0 (20...-120) Set the compressor speed value applicable for remote control. Read more in the "Def. Remote Control" section of the "Installer  /   D efine" chapter. Noise reduction schedule This menu starts a schedule with limited compressor speed to reduce the noise level.

  • Page 49: Defrost Heating Temp Min M

    Defrost heating temp min m 10 (0...360) Set the minimum heating time "Min m" (minutes) for Max m the heating coil in the condensation tray at outdoor temperature T1. Defrost heating temp max m 10 (0...360) Min m Set the maximum heating time "Max m" (minutes) for the heating coil in the condensation tray at outdoor temperature T2.

  • Page 50: Boiler Upper Add. °C

    9.9.3 Settings Immersion heater Boiler upper add. °C 57 (30...70) Temperature when the immersion heater kicks in and helps EcoHeat 400 to produce DHW when there is great demand. The immersion heater is also responsible for providing the house with additional heating. If the house requires a higher temperature than that selected, the control system compensates by automatically raising the temperature of the immersion heaters.

  • Page 51: Tariff El No

    Tariff EL No (Yes/No) This menu bar is displayed if an “Input” for remote control is defined for the “Tariff EL” function in the “Installer/ Define/Remote Control” menu. “Yes” means the function can be activated via remote control. Read more in the “Installer/Define/Remote Control/Tariff EL”...
  • Page 52 9.9.4 Settings Upper tank DHW program Available options are “Economy”, “Normal” and “Comfort”. Press “OK” to open the settings for the selected DHW program. The factory settings shown below apply to “Normal” mode. Refer to the “Parameter List” chapter for the “Economy”...
  • Page 53 9.9.5 Settings Lower tank SmartGrid Low price °C Off (Off/1...30) The setpoint for lower tank heating is increased by the value set in this menu when ”SmartGrid Low price” is active. Both SmartGrid A and SmartGrid B must be defined in the remote control menu for this menu to be displayed.
  • Page 54 Settings Diff thermostat function 9.9.6 The function must be defined before the settings can be entered. Diff thermostat function is used to charge the system tank from a different heat source. Charge start diff temp °C 7 (3...30) Here you can set the temperature difference determining when charging from the heat source is started.
  • Page 55 9.9.7 Settings Cooling Room temp. cooling °C 25.0 (18...30) This is used to set the desired room temperature for cooling. Active delay 10 (Off/1...600) Delay refers to the time (minutes) before the production of cooling is allowed when there is a need for cooling. Start delay 180 (Off/1...240) The menu determines the delay time (minutes) from the...
  • Page 56 9.9.8 Settings Communication Settings can be made here to control the product with a control system. 9.9.8.1 Settings Ethernet DHCP Yes (Yes/No) "Yes" enables automatic connection to the network. If "No", custom router settings (IP address, Netmask and Gateway) as well as DNS setting must be made. Menu: "Installer/Settings/Communication".
  • Page 57 9.9.8.4 Settings El. prices Ensure that "myUplink" is selected in the "Def. Communication" menu. Select "El.prices" in the "Installer/Settings/ Communication" menu to access the "Set. El.prices" menu. Price control On/Off Select "On" to show the other menu lines of the "Set. El.prices"...
  • Page 58 Days in calculation 1...10 Select the number of days on which the dynamic calculation of the electricity price will be based. Since the dynamic calculation is based on the average price per day, more days in calculation result in a more stable and reliable value.
  • Page 59 9.9.9 Settings Current sensor These menu bars are displayed if "Current Sensor" is defined in the "Installer/Define Current Sensor" menu. In the menu, specify the phases (L1, L2 and L3) to which the current sensors have been connected. In the lower left corner of the screen, "Invalid configuration"...
  • Page 60 9.9.11 Settings SmartGrid schedule This menu is used to schedule the weekday periods during which the "SmartGrid" functions should be active. This schedule is repeated every week. "SmartGrid" can be used to block a function ("SG Block.") or to achieve a temperature increase during periods when the energy price is low ("SG Low price") or ("SG Overcapacity").

  • Page 61: Define

    9.10 Define The "Define" menus specify which components and subsystems the system consists of. Menu: "Installer/Define". 9.10.1 Def. Remote control This chapter describes all remote control functions; how they are set up and how they are used. The "Installer/Define/Remote Control" menu defines how the remote control inputs should be activated by specifying one of the following three modes of activation in the "Input"...
  • Page 62 9.10.1.1 Setting the remote control function, example 1. Define an "Input" First, an input must be assigned to the function or functions to be controlled remotely. This is done in the "Installer/Define/Remote Control" menu. In the example, terminal block K24 is selected as the input for the "HC1 Heating mode, Ext."...
  • Page 63 9.10.1.2 Remote control functions The "Installer/Define/Remote Control" menu defines Inputs for current remote control functions: Inputs K22, K23, K24, K25. • • wireless accessories in the SmartControl series (Channel 1A, 1B, 2A, 2B, 3A, 3B and so on up to 7B).
  • Page 64 HC1- Program economy/normal/comfort/custom ext. config. (Off / K22-K25  /  Channel 1A-7B /  B MS DI0-7) The program functions "Economy", "Normal" "Comfort" and "Custom" can be used to change the indoor temperature for a certain period. In the "Installer  /  Define/Remote Control" menu: • specify an "Input"...
  • Page 65 Tariff EL (Off/ K22-K25 /Channel 1A-7B /  B MS DI0-7) This function is used to block the immersion heater during periods when the electricity rate is higher. In the "Installer  /  Define/Remote Control" menu: • specify an "Input" for the remote control function. In the "Installer/Settings/Additional Heat"...
  • Page 66 SmartGrid A / SmartGrid B (Off/  K 22-K25 /Channel 1A-7B /  B MS DI0-7) In the “Installer  /  Define/Remote Control” menu: • specify an “Input” for the remote control function. There are three SmartGrid functions: • SmartGrid Low Price • SmartGrid Overcapacity •...
  • Page 67 DHW tank/Lower tank/Upper tank SmartGrid Blocking °C (Off/−1...−50 °C) • • SmartGrid Low Price °C (Off/1...30 °C) • SmartGrid Overcapacity °C (Off/1...30 °C) Buffer tank • SmartGrid Low Price °C (Off/1...30 °C) • SmartGrid Overcapacity °C (Off/1...30 °C) SmartGrid functions are enabled by activating the K22 (SG A) K23 (SG B) Function...
  • Page 68 Diff Thermostat function (Off/ K22-K25  / Channel 1A-7B  /  BMS DI0-7) This function is used to block the diff thermostat function. In the "Installer / Define/Remote Control" menu: • specify an "Input" for the remote control function. In the "Installer / Define/Diff thermostat function" menu: configure the normal mode for the external •...
  • Page 69 9.10.2 Def. Heating Circuit Heating Circuit 1 Yes (Yes/No) Heating Circuit 1 (HC 1) is predefined by the control system. Heating Circuit 2 is shown on the row underneath if connected. Room sensor Yes (Yes/No/Show) Selection “Yes” means that room sensors should be connected to the heating circuit.
  • Page 70 9.10.3 Def. Heat pump Heat pump Off (On/Off) Select whether the heat pump should be On or Off. Flow/level switch None (None/NC/NO) This menu bar is displayed if an “Input” for remote control is defined for the “Flow/level switch” function in the “Installer/Define/Define Remote Control”...
  • Page 71 9.10.6 Def. Diff thermostat Diff thermostat function No/Yes If ”Yes” is selected, the menu ”Blocking diff thermostat ext. config.” is displayed. Blocking diff thermostat ext. config. None (None/NC/NO) This menu defines the Normally Open (NO) or Normally Closed (NC) mode for the external control signal when controlling the function remotely.
  • Page 72 9.10.8 Def. Cooling Cooling is adjusted using primary flow sensor 2 (B2), which then means that heating circuit 2 and cooling cannot be used simultaneously. Cooling No (Passive/No) "Passive" means that cooling is used. Common Heating/Cooling No (Yes/No) "Yes" means that cooling and heating are distributed in the same heating circuit.
  • Page 73 9.10.9 Def. SMS Activate No (Yes/No) If "Yes" is selected, the menus below are displayed: Level of signal The signal strength of the reception is shown here. Phone Number 1 The first activated phone number is shown here. Phone Number 2 Menu: "Installer ...

  • Page 74: Service

    9.11 Service NB: This menu is intended for the installer only. Menu: "Installer/Service". 9.11.1 Function test From this menu, the installer can test the connection and function of separate components of the heating circuit. When this menu is activated, all control functions are stopped.
  • Page 75 Defrost Manually Off (Off/On) When the “Manual defrosting” function is tested, a defrosting cycle will be performed in the air-to-water heat pump. Defrosting cannot be stopped once it has been started and the defrosting programme will be completed. Compressor heater Off (Off/On) Function test compressor heater.
  • Page 76 9.11.2 Alarm log In the alarm log, up to 500 alarms can be displayed at the same time. An alarm which reoccurs within an hour is ignored so as not to fill up the log. Click an alarm row to see more information about an alarm.
  • Page 77 9.11.6 Software update The display software can be updated either via USB drive or online. The rows are greyed out until the USB drive is installed or the display is connected to the internet. Click OK to confirm the upload. The settings are retained during updating, but the old values are overwritten by any new factory values.

  • Page 78: Operation And Maintenance

    10. Operation and Maintenance When the installer has installed your new system, you should check along with the installer that it is in perfect operating condition. Let the installer show you where the switches, controls and fuses are so that you know how the system works and how it should be maintained.

  • Page 79: Troubleshooting

    11. Troubleshooting The heat pump is designed to provide reliable operation and high levels of comfort, and to have a long service life. Various tips are given below which may be helpful and guide you in the event of an operational malfunction. If a fault occurs, you should always contact the installer who installed your unit.
  • Page 80 Current monitor The heat pump has an integrated current monitor. If the system is fitted with a current sensor, the property’s main fuses are continuously monitored to ensure they are not overloaded. If the fuses are overloaded, the heat pump will automatically reduce its power output.

  • Page 81: Information Messages

    11.1 Information messages Information messages are displayed when appropriate and are intended to inform users about various operational situations. [I002] HC1 Heating off [I013] Start delay [I005] HC2 Heating off The compressor is not allowed to start too quickly when it Shows for each heating circuit that the product is has stopped.

  • Page 82: Alarm Messages

    11.2 Alarm messages If a fault occurs with e.g. a sensor, an alarm is triggered. A message appears on the display with information about the fault. You reset the alarm by pressing the Reset Alarm button on the display. If several alarms are triggered, they are displayed one after the other. A persisting fault must first be rectified before it can be reset.
  • Page 83 Alarm messages Description [E055] Incorrect phase sequence The product’s compressor motor must rotate in the right direction. The product checks that the phases are connected correctly; otherwise, an alarm is triggered. This will require changing two of the phases into the product. The power supply to the system must be shut off when rectifying this fault.
  • Page 84 Alarm messages Description [E135] Risk of freezing Alarm indicating that the temperature of the outgoing water from the heat pump (HP out) is too low for defrosting. The water volume in the system may be too low. The flow may be too low. (Applies to EcoAir) [E152] 4-way valve This alarm message is displayed if a fault occurs with EcoAir's 4-way valve or if the connection pipes to the EcoAir are incorrectly connected.

  • Page 85: Critical Alarms - Risk Of Freezing

    [E135] Risk of freezing Applies to all air/water heat pumps controlled by CTC EcoLogic L/M/S, CTC EcoZenith i255/i360/i555 and CTC EcoVent i360F. Alarm conditions If the temperature of the water exiting the heat pump (HP out) is lower than 15 °C during a defrost period or if there is more than 15 °C difference between HP...
  • Page 86 [E216] HP flow temp diff Applies to CTC EcoAir 500/600M/700M. Alarm conditions The difference between HP in and HP out exceeds 12 °C in heat operation for more than 15 minutes. Possible cause The circuit temperature and/or flow rate is too low. •...

  • Page 87: Pipe Installation

    ∆t (e.g. 10 °C). Then move horizontally to the line for the EcoZenith i255 mixing valve = line 6.3 DN20. The reading for the pressure drop is taken from the scale directly below (4 kPa). For EcoZenith i255, see valve DN20.
  • Page 88 12.1.2 Pump curve charge pump 15-75 130 The diagram below shows the pump curve for the factory-installed charge pump for the heat pump. 15-75 130 [kPa] 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 Q [m³/h] Q [l/s] 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4...

  • Page 89: Schematic Diagram

    12.2 Schematic diagram This shows the main connection between the CTC EcoZenith i255 and the property’s heating circuit and DHW system. Different installations and systems may look different, e.g. a one or two-pipe system, which means that the finished installation may be different.
  • Page 90 Circulation pump, heating circuit (G1) (G2) The circulation pump is fitted on the boiler’s primary flow and must be connected electrically from the boiler; see chapter on Electrical installation. Mixing valve DHW (65) Install a mixing valve for the hot tap water in order to avoid the risk of scalding. Safety valve for DHW out temp (93) Fit the enclosed valve to the incoming cold-water connection.
  • Page 91 In some cases, unusual noises may be produced by the house’s pipe system and the EcoZenith i255 due to the pressure surges that occur when the flow is suddenly interrupted. There is no fault with the product, but the noise may occur when older types of instant closing mixers are used.
  • Page 92 DHW circulation system It is possible to connect a DHW circulation system, an example of such a connection is shown below. (*G40 Not controlled by the product. Use a separate control or constant voltage on the circulation pump).

  • Page 93: Connection To Heat Pump

    Pipe connection for CTC EcoZenith i255 L In CTC EcoZenith i255 L, the charge pump for the heat pump is factory-fitted. CTC EcoZenith i255 L has pipes on the rear of the right edge for connecting the heat pump. ...
  • Page 94 Incoming (heated water) from heat pump Ø22. Outgoing (cold water) to heat pump, union 3/4. The charge pump on CTC EcoZenith i255 H is fitted to the outgoing connection to the heat pump (behind the 3-way valves). The drainage valve must be fitted to this connection. It functions as drainage for both the boiler and the heating circuit.

  • Page 95: Schematic Diagram Of Passive Cooling - Combined Cooling/Heating

    12.4 Schematic diagram of passive cooling – Combined cooling/heating...

  • Page 96: Schematic Diagram Of Passive Cooling In Separate Heating Circuits

    12.5 Schematic diagram of passive cooling in separate heating circuits.
  • Page 97 12.5.1 Diff thermostat function The diff thermostat function is used to transfer heat from the tank with sensor (B46) to the H-tank. The function compares temperatures in the tanks and when it is warmer in the tank (B46), charging to the H-tank is started. H-tank...

  • Page 98: Electrical Installation

    13. Electrical installation Installation and connection in the CTC EcoZenith i255 must be undertaken by an authorised electrician. All wiring must be installed according to applicable provisions. Safety switch The installation should be preceded by an omnipolar safety switch according to overvoltage category III, which ensures disconnection from all electric power sources.

  • Page 99: Positioning Of Electrical Components

    G31-G40 Terminal block: A11-A20 Terminal block: G61-G76 Terminal block: A21-A30 Contactors Electrical installation CTC EcoZenith i255 Lower Electric Cartridge Cable clip Heat pump power supply The black connector that only supplies power to a connected heat pump is connected here.

  • Page 100: Electrical Connection To Heat Pump

    13.3 Electrical connection to heat pump General The heat pump is powered from the CTC EcoZenith i255 via a separate connector. NOTE: does not apply to the CTC EcoAir 614M, 622M and 700M series, these products are powered separately. Charge pump...
  • Page 101 13.3.2 Heat pump power supply The heat pump can be powered from CTC EcoZenith i255 with the included black connector located at the bottom of the electrical box. (NOTE: does not apply to the CTC EcoAir 614M, 622M and 700M series, these products are powered separately.

  • Page 102: Extra Low Voltage Protection

    13.4 Extra low voltage protection The following outputs and inputs have extra low voltage protection: current sensor, outdoor sensor, room sensor, primary flow sensor, return sensor, NR/ SO, temperature sensor, level switch and PWM signals. Connection of outdoor sensor (B15) The sensor should be set up on the house’s northwest or north side, so that it is not exposed to morning and evening sun.
  • Page 103 13.4.1 Current sensor connection The three current sensors, one for each phase, are fitted on the fuse panel in the following manner: Each phase from the electricity distribution board supplying the product is channelled through a current sensor before termination at the relevant terminal.

  • Page 104: Settings To Be Carried Out By The Installation Electrician

    13.5 Settings to be carried out by the installation electrician The following settings shall be made by the installation electrician after installation: • Select main fuse size. • Select the power limitation for the immersion heater. • Check room sensor connection. •...
  • Page 105 13.5.2 Switching to 18 kW immersion heater power CTC EcoZenith i255 400V 3N~ can be reconnected to an 18 kW immersion Warning Begin by heater. disconnecting the NB: Installation must be carried out by a qualified electrician. power to the product.
  • Page 106 A code is printed on the black wires which indicates the cable number and connection position, e.g. 46 K2:1, where the 1 indicates screw joint position 1. - Begin by loosening the screw joint at position 1 and freeing the brown wire.

  • Page 107: Connection Of Pump (G46) To Differential Thermostat Function

    13.6 Connection of pump (G46) to Differential thermostat function 230V 1N~ The circulation pump (G46) is connected at the following terminal blocks: Relay card in EcoZenith i255 (see wiring diagram). Note the cable colours! Phase: brown Terminal block A11 Neutral:...

  • Page 108: Component List, Wiring Diagram

    13.9 Component list, wiring diagram Component Display Relay/main card CTC Solar controls/Expansion card Soft-start card with motor protection and contactor function HP control card Primary flow sensor 1 NTC 22 Primary flow sensor 2 NTC 22 Upper tank sensor NTC 22 Lower tank sensor NTC 22 Return sensor...

  • Page 109: Wiring Diagram 400V 3N

    13.10 Wiring diagram 400V 3N~ 586241...

  • Page 110: Wiring Diagram 230V 1N

    13.11 Wiring diagram 230V 1N~ 586595...

  • Page 111: Wiring Diagram 230V 3

    13.12 Wiring diagram 230V 3~ 586596...

  • Page 112: Installation Communication

    14. Installation Communication Menu: "Installer/Define/Communication". The back of the display unit has 3 communication ports. Communication Display communication ports Port 1. RS485 port without galvanic protection. For external equipment, e.g. property control (BMS*). Existing property control CTC Product Port 2. Network jack (ethernet), see connection information on following page.

  • Page 113: Installing The Network Cable

    14.1 Installing the network cable Turn off the product’s main switch before opening the front. 1. Remove the front plate. Run the network cable in front of the product’s top cover edge according to the arrows. 2. Open the ferrite from the packaging, clamp around the ethernet cable with the connector.

  • Page 114: Remote - Screen Mirroring

    14.2 Remote - Screen Mirroring • Connect the ethernet cable, see previous page. Installer/Define/Communication/Web – Yes. • Permits the product to connect with unencrypted web traffic on local area networks. Internet router and firewall required. • Installer/i – Scan the QR code with a tablet or smartphone.

  • Page 115: First Start

    15. First start When the heat pump is delivered, the compressor is blocked to avoid accidental start-up. The heat pump can be installed and started before the bedrock/ground source or air-to-water heat pump is commissioned. The heat pump can also be started without the room sensor installed, as the set curve will control the heating.
  • Page 120 www.ctc.se, www.ctc-heating.com +46 372 88 000 Fax: +46 372 86 155 P.O Box 309 SE-341 26 Ljungby Sweden...

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