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Chiltrix CX34 Installation And Operation Manual

Air to water heat pump, dc inverter. for use with units shipped after 10-12-2018. options for heating, cooling and domestic hot water.
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DC INVERTER
AIR TO WATER HEAT PUMP
For Use with units shipped after 10-12-2018
(If unsure, contact Chiltrix technical support dept. with the serial number)
Installation and Operation Manual CX34-3
Options for Heating, Cooling and Domestic Hot Water
PLEASE REVIEW ENTIRE MANUAL BEFORE PROCEEDING
PLEASE SUBMIT SYSTEM DRAWING & SCHEDULE A COMMISSIONING
CALL BEFORE STARTING THE UNIT
Version 1.9
Chiltrix Inc.
www.chiltrix.com
1

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Summary of Contents for Chiltrix CX34

  • Page 1 DC INVERTER AIR TO WATER HEAT PUMP For Use with units shipped after 10-12-2018 (If unsure, contact Chiltrix technical support dept. with the serial number) Installation and Operation Manual CX34-3 Options for Heating, Cooling and Domestic Hot Water PLEASE REVIEW ENTIRE MANUAL BEFORE PROCEEDING PLEASE SUBMIT SYSTEM DRAWING &...

  • Page 2: Table Of Contents

    Chiltrix Inc. www.chiltrix.com Table of Contents Safety Precautions………………………………………………………………………………………… Page 3 CX34 Components………………………………………………………………………………………… Page 4 Hydronic Piping and Design…………………………………………………………………………… Page 5 Buffer Tanks…………………………………………………………………………………………………… Page 7 Head/Pressure Drop Calculations…………………………………………………………………… Page 8 Using Glycol……………………………………………………………………………………………………. Page 11 Heat Pump Installation………………………………………………………………………………….. Page 12 Valves G1, G2, G3…………………………………………………………………………………………… Page 20 Second Heat Source……………………………………………………………………………………..

  • Page 3: Safety Precautions

    Chiltrix Inc. www.chiltrix.com IMPORTANT NOTE – MAKE SURE TO PROVIDE YOUR DESIGN DRAWING FOR APPROVAL BEFORE GETTING STARTED, INCLUDING DESIRED OPERATING TEMPERATURES. Safety Precautions NOTE: It is required to read the Safety precautions in detail before operation. The precautions listed below are very important for safety, please follow all safety precautions.

  • Page 4: Cx34 Components

    Chiltrix Inc. www.chiltrix.com CX34 Components...

  • Page 5: Hydronic Piping And Design

    The installer should calculate the pipe and fitting resistance to determine the head pressure. See the examples on the following pages, maximum water flow for the CX34 is 6-7.5 gpm, design flow is 4.8 gpm. If necessary, a second Chiltrix-provided PWM pump may be added to the loop and controlled by the CX34.
  • Page 6 Preferred Method For 2 or 3 Units: Optional Method, multiple heat pumps piped in parallel: (Requires additional loop pump supplied by installer) PLEASE SEND YOUR PROPOSED FINAL DESIGN TO CHILTRIX SUPPORT DEPARTMENT FOR APPROVAL, COMMENTS, AND SUGGESTIONS Pipe Insulation All loop piping must be insulated per local and national mechanical codes. Any piping in a system with chilled water (used for cooling) must also be sealed vapor tight to prevent condensate issues.

  • Page 7: Buffer Tanks

    A 15-20 gallon buffer tank is used generally for best performance with a single CX34. 30-45 gallons is used for systems of two or three CX34s, and used when multiple CX34s are to be combined. A G3 seasonal valve may be used to isolate the tank in cooling mode, if applicable, note that isolating the buffer tank in this manner may cause the need for an additional volume tank to be added.

  • Page 8: Head/Pressure Drop Calculations

    Chiltrix Inc. www.chiltrix.com Head Calculation Example: To calculate the head pressure for the correct water flow, the pipe length must be measured and all fittings counted. It is advisable to use flexible red oxygen barrier PEX piping and route it so as to avoid as many elbows as possible.
  • Page 9 The previously shown example loop has a volume of 4.5 gallons. The internal thermal expansion tank is 2 liters or .52 Gallons. The volume of the CX34 is 4.5 liters. An additional thermal expansion tank may be required for larger loops. There are many thermal expansion calculators on the internet, the following is an example.
  • Page 10 If required flow is 8.8 GPM, the maximum allowed head would be 18.0 Ft. Note: The CX34 unit adds max 6 ft. head. A booster pump may be needed for non-optimal designs, longer piping distances, dual or triple CX34s, other complex or larger systems.

  • Page 11: Using Glycol

    Chiltrix Inc. www.chiltrix.com Glycol While not always required, customers in colder climates that are subject to occasional freezing should add an appropriate percentage of food-grade propylene glycol to the system. NEVER USE ETHYLENE GLYCOL. Ethylene Glycol is a poison. Propylene Glycol is a non-toxic anti-freeze also used in food, cosmetics, etc. and can safely be used.

  • Page 12: Heat Pump Installation

    Chiltrix Inc. www.chiltrix.com Chiltrix Heat Pump Installation Heat Pump Installation Installation position Note: Installation must be carried out by professional personnel. The recommended mounting pad should be at least 1 ½” above ground level. If you are in an area where snow occurs, mount the unit high enough above grade to avoid blockage by drifting snow.
  • Page 13 Chiltrix Heat Pump Installation NOTE: The CX34 is shipped with the pump in a separate box attached to the top of the chiller. Please follow the directions below to install the “C4” Wilo Yonos PARA internal pump. Internal Pump Installation...
  • Page 14 Chiltrix Inc. www.chiltrix.com Internal Pump Wiring Electronics Cabinet If the Wilo RS 25/7.5 PWM pump does not have the required flow rate, a second Wilo RS 25/7.5 may be added to increase the total pump pressure and flow. This will double the head pressure capability at the targeted flow rate.
  • Page 15 Chiltrix Inc. www.chiltrix.com The blue and brown pump CONTROL WIRES are connected to the (+ & -) on the PWM1 terminal connector at the top or the main control pcb. Pump POWER wires. Pump GROUND wire.
  • Page 16 Chiltrix Inc. www.chiltrix.com Electrical Connection General Note! Electrical installation and service must be carried out under the supervision of a qualified electrician. Electrical installation and wiring must be carried out in accordance with the NEC. The heat pump must be connected under the supervision of a qualified electrician. Wires, spare parts and materials etc.
  • Page 17 Chiltrix Inc. www.chiltrix.com Electric Connections and Component Locator...
  • Page 18 Chiltrix Inc. www.chiltrix.com CX34 System Wiring Diagram...
  • Page 19 Chiltrix Inc. www.chiltrix.com When using a second NON-PWM water pump When using a second NON-PWM water pump, use terminals L2 and C6L for relay coil power only. Do not connect a pump directly to L2 and C6L, always use a relay with a 240 vac coil.

  • Page 20: Valves G1, G2, G3

    Note* There is one sensor taped to the outer CX34 plastic wrapper with the rubber feet, it is for the DHW tank. The indoor ambient air temp is not used at this time, however, do not disconnect this sensor. Leave all unused sensors plugged in and wrapped in the bundle above the compressor.
  • Page 21 DHW and AC / Heating with two chillers in Parallel G1 and G3 valves use 220v Primary from the CX34. Use conduit and install per local code. Below shows 2x G1 valves, used this way so that Chiller 2 can continue to provide cooling or heating while Chiller 1 deals with any DHW load.
  • Page 22 7GPM. If a booster pump is needed for a different reason, this location should also be used. Check the DHW tank pressure drop from the Chiltrix Tank Manual or tank provider coil specs if not using a Chiltrix tank. The G1 valve should be located as close to the CX34 as practical.
  • Page 23 P50. When parameter P50 is 0, the valve is configured as a seasonal Switch. When parameter P50 is 1, the valve is configured as a solar pre-heat valve. The CX34 compares the solar tank temp and AC returned temp. When the solar tank temp – AC returned temp is ≥ 5 ℃, the 3-way valve G3S will be on;...
  • Page 24 Chiltrix Inc. www.chiltrix.com G3 VALVE Seasonal Switch Valve G3 Ports...

  • Page 25: Second Heat Source

    This would typically be a small inline tank located on the supply side of the loop, between the CX34 outlet and the first of any load inlets. The thermostat/element must be set to max 120F and any such tank used for this purpose must have code- compliant pressure relief valve installed and properly vented via copper pipe to a drain.

  • Page 26: External T-Stat Control

    The internal T-Stat allows a heat pump thermostat or other external controller to control switching the heating, cooling and standby modes (DIN 6 & 7 disabled) of the CX34 via relay. This method of control generally requires a single-stage standard heat pump thermostat, a installer provided 24 vac transformer and two relays, (Eg.
  • Page 27 Onboard External relay Control – Cont’d Once the relays are wired as shown, the CX34 DIN setting must be changed Disabling DIN6 & DIN7 will allow the standard CX34 controller and/or Psychrologix Controller to override the relays The switch status can be displayed in the C parameters C63 is DIN6 AC heating switch mode status;...

  • Page 28: System Filling/Purging

    System filling with Propylene Glycol and water At or near the CX34 a flush/fill valve assembly must be installed. This can be made with three ball valves and a couple hose fittings. See example below. Pre-mix the propylene glycol in a container large enough to hold the loop volume plus a few gallons.
  • Page 29 If a DHW tank is installed, it should be the first device on the loop as shown. The G1 valves should always be as close to the CX34 as possible. The tank should be as close to the G1 valve as possible.

  • Page 30: Using The Controller/Operation

    Chiltrix Inc. www.chiltrix.com Standard Controller (Included with all Cx34 Units) Functions and features Cooling, Heating, DHW, cooling + DHW, heating + DHW mode of operation options, automatic fault detection, alarm processing, and energy control. 1. The 4-conductor control cable can be extended up to 300 feet of 20 AWG or larger.
  • Page 31 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) (4) Shutdown button: Used to execute the shutdown command, when clicked it will pop up a confirmation window, click "OK" to execute the boot command, or click "Cancel" for no action. The shutdown command us used to take the chiller out of heating or cooling mode.
  • Page 32 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) Figure 1-3 Figure 1-3 (16) Time: Used to display and set the current time. When clicked, a pop-up showing the date and time is displayed, Figure 1-3. From left to right, and from top to bottom is the year, month, day, hour, minute, and second.
  • Page 33 Consider writing the password on the back of the controller. NOTE: Chiltrix technical support has no easy or simple way to reset this password for you. If you decide to use a password, make sure to write it down and keep it in a secure location.
  • Page 34 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) Figure 1-6 After the password is entered correctly, as shown in Figure 1-6, The Mode may be set, click "Exit" in the main menu or "X" in the task bar to exit the application.
  • Page 35 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) 1.3 SYSTEM  Language: Default is English.  Screensaver: Sets the screen saver pop-up time.  Buzzer: Disables or uses the buzzer sound when the unit has an alarm.  Date & Time: you can set the machine date and time.
  • Page 36 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) After enabling the timer function touch the X in the top right screen to return to the previous screen.
  • Page 37 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) Touch the current time values to change the hour, minute and second. Touch the day of the week buttons to highlight them and make active. There are 5 modes that can be set to use electricity when the rate is lower. Only one mode can be set...
  • Page 38 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) Program each timer the same way using the touch screen to set the values. Timer 3 “OFF” settings.
  • Page 39 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) Timer 3 “Mode” settings. Timer 4 ON, OFF and MODE settings.
  • Page 40 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) Timer 4 “ON” settings. Timer 4 “OFF” settings.
  • Page 41 Chiltrix Inc. www.chiltrix.com Standard Controller (cont’d) Timer 4 “Mode” settings...
  • Page 42 Touch the mode bar and the screen below will appear. Select the mode you want by touching the bar associated with the mode. AU Heat Mode should be disabled unless using Dynamic Outdoor Reset (p. 57) and AU DHW Mode is not used on the CX34 and should be disabled...
  • Page 43 Chiltrix Inc. www.chiltrix.com To Start the selected mode hit the Start button then “OK” Use this same sequence for all of the modes. Always “shutdown” the chiller and wait for the compressor to turn off before removing the power To shut down a mode, touch the “shutdown” icon.
  • Page 44 Chiltrix Inc. www.chiltrix.com Setting the target or Set Point Temperature Next, to set the temperature, go back to the desktop and touch the “set target AC” icon. Using the keypad select the desired temperature and touch the “ENT” icon. Note* The AC Target must be set for both heating and cooling modes. The target temperature is the EWT (entering water temperature) (return temperature) and implies a LWT (leaving water temperature)(supply temperature) 9-10F higher.

  • Page 45: P-Parameter Setting

    Chiltrix Inc. www.chiltrix.com Manufacturers Settings (Parameter Checking and Setting) “P Parameters” Touch and hold the lower left side of the main window for more than 3 seconds to enter the factory setting confirmation window as shown in Figure 3-1, press "Confirm" Factory setting, or press “Cancel”...
  • Page 46 Chiltrix Inc. www.chiltrix.com 3.1 Communication Setting Communication settings include settings for the protocol and baud rate. These settings should never be changed. Fig 3-3 Enter the factory settings menus as shown in figure 3-1, the left is the "main menu", on the right are the "P parameters".
  • Page 47 Chiltrix Inc. www.chiltrix.com 4. Parameter Checking and Setting “MFG MODE” NOTE: Your controller will show some parameters that are not listed here, If they are not listed they are not applicable to the CX34 NO Name scope/means Range, Meaning Default P00 Power-down recovery function 0：off；1：on...
  • Page 48 Chiltrix Inc. www.chiltrix.com NOTE: Your controller will show some parameters that are not listed here, If they are not listed they are not applicable to the CX34 P47 hot water frequency limitation 2~10，max frequency 20~100% 2~10= max frequency 20~100% P48 AC heating AU mode highest temp 30~50℃...
  • Page 49 Chiltrix Inc. www.chiltrix.com NOTE: Your controller will show some parameters that are not listed here, If they are not listed they are not applicable to the CX34 P74 Debugging fixed operating frequency 10~100 HZ 10~100 HZ 50HZ P75 run setting frequency...

  • Page 50: Status/C-Parameter Checking

    Chiltrix Inc. www.chiltrix.com 5 STATUS The status application is used to check the detailed status of the unit operation, such as compressor speed, fan speed, G1, G2, G3, G4 valves and so on. See Fig. 5-1 5.1 State preview display interface Compressor: Displays the current working status of the compressor.
  • Page 51 Chiltrix Inc. www.chiltrix.com 6. Parameter Checking Only NOTE: Your controller will show some parameters that are not listed here, If they are not listed they are not applicable to the CX34 Name Scope/means Range, Meaning out pipe temp -30~97℃ -30~97℃...
  • Page 52 Chiltrix Inc. www.chiltrix.com NOTE: Your controller will show some parameters that are not listed here, If they are not listed they are not applicable to the CX34 Thermal switch status 1=on, 0= off 1=on, 0= off outdoor fan motor 1= run, 0= stop...

  • Page 53: About Screen (Software Version)

    Figure 7-1 8 INITIAL TEMPERATURE SETTINGS *Note – All set points refer to the CX34 return (inlet) temperature, and implies a leaving (outlet) temperature of ~10°F cooler(cooling)/warmer(heating) than what you set. For example if you want heating output to be ~100°F you would set the heating target to 90°F. Default setting for cooling should be 54°F, therefore the leaving (outlet) temperature would be around 44°F.

  • Page 54: Error Codes

    Chiltrix Inc. www.chiltrix.com Error Codes / Faults 9 FAULTS Touch the ERROR icon to access the current error. Fault application is used to query the current or historical fault. After entering the fault application, click on the main window of the "current fault" or "historical failure" to display errors.
  • Page 55 Chiltrix Inc. www.chiltrix.com 9.3 CX34 Error Codes, Error Meaning, and Reason Error code Error Meaning Reason Compressor discharge high temp Poor refrigerant or throttle is not normal protection (stop compressor) Outdoor air temp sensor open or short circuit (stop Outdoor air temp sensor error...
  • Page 56 Chiltrix Inc. www.chiltrix.com (1) less refrigerant; (2) throttle failure; (3) low-voltage low pressure protection switch failure compressor overheat protection (1) less refrigerant; (2) throttle mechanism failure over current protection Verify that (1) too much refrigerant; (2) throttle mechanism P88 = 4 failure;...

  • Page 57: Dynamic Outdoor Reset Control

    But that's not the case with a heat pump. Here's why: For a real-world example, at 0F outdoor temperature, an air to water heat pump such as the CX34 will have >20% higher capacity when used with an operating temperature of 95F compared to operating at 122F. And COP at 95F will be >30% higher at 95F than at 122F.
  • Page 58 The tool is located at https://www.chiltrix.com/dynamic-heat-reset/ Set parameter P48 and P49 in cx34 controller according to the values used in your curve. Enable AU of heat mode as shown below. There also is an "AU" icon on first page of the standard controller display that will indicate when the AU setting is enabled.

  • Page 59: Commissioning And Initial Test Run

    Running a Test- Call tech support if this is your first time commissioning a CX34. Apply power to the CX34 and select heating mode using the wired controller. If there is not enough flow in the system or air in the lines and you will get P5 and P1 errors. Call tech support if any error codes are displayed on the wired controller.

  • Page 60: Footprint/Placement Dimensions

    Chiltrix Inc. www.chiltrix.com...
  • Page 61 Chiltrix Inc. www.chiltrix.com...

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