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Chiltrix CX35-1 Installation And Operation Manual

Air to water heat pump
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DC INVERTER
AIR TO WATER HEAT PUMP
For Use with units (with serial number beginning as CX35)
(If unsure, contact Chiltrix technical support dept. with the serial number)
Installation and Operation Manual CX35-1
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
Cx35-1 Version 1.0
Chiltrix Inc.
www.chiltrix.com
1

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  • Page 1 DC INVERTER AIR TO WATER HEAT PUMP For Use with units (with serial number beginning as CX35) (If unsure, contact Chiltrix technical support dept. with the serial number) Installation and Operation Manual CX35-1 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 CX35 Components………………………………………………………………………………………… Page 4 Hydronic Piping and Design…………………………………………………………………………… Page 5 Buffer Tanks…………………………………………………………………………………………………… Page 8 Head/Pressure Drop Calculations…………………………………………………………………… Page 9 Using Glycol……………………………………………………………………………………………………. Page 12 Heat Pump Installation………………………………………………………………………………….. Page 13 Valves G2, G3………………………………………………………………………………………………… Page 21 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: Cx35 Components

    Chiltrix Inc. www.chiltrix.com CX35 Components...

  • Page 5: Hydronic Piping And Design

    See the examples on the following pages, maximum water flow for the cx35 is 6-7.5 gpm, design flow is 5.2 gpm. If necessary, a second Chiltrix-provided PWM pump may be added to the loop and controlled by the cx35. The second water pump connections are always in series with the internal pump. The loop example above shows a fully involved system, your system may be far more simple.
  • Page 6 Preferred Method For 2 or 3 Units: PLEASE ALWAYS SUBMIT YOUR DESIGN TO CHILTRIX FOR APROVAL NOTE about fittings: All Chiltrix V18, tanks, etc., have stainless steel fittings. It is difficult to connect stainless to stainless, we suggest to use brass fittings for all connections.
  • Page 7 </= 12kbtu capacity. Otherwise, consider using a VCT37 tank and locating the fan coil/AHU units on the load side of a buffer tank. 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.

  • Page 8: Buffer Tanks

    The radiant loop pump in the buffer tank drawing is controlled by the customer’s radiant controller. The buffer tank isolates the Chiltrix internal pump from other pumps, and in the case of multiple heat pumps, from each other - providing hydraulic separation and thermal buffering.

  • Page 9: Head/Pressure Drop Calculations

    Chiltrix Inc. www.chiltrix.com 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 10 Chiltrix Inc. www.chiltrix.com Head Calculations - Continued: 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 cx35 is 4.5 liters. An additional thermal expansion tank is likely required for larger loops.
  • Page 11 Chiltrix Inc. www.chiltrix.com GRUNDFOS UPMM 15/25-95 230V PWM This is the Grundfos pump head curve for Chiltrix CX35. Note, the CX35 itself has 4.5ft of head. This leaves about 19 ft of head net of the chiller.

  • Page 12: Flow Rates

    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 13: 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 14 Chiltrix Inc. www.chiltrix.com Chiltrix Heat Pump Installation NOTE: The cx35 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” Grundfos internal pump. Internal Pump Installation...
  • Page 15 Chiltrix Inc. www.chiltrix.com Internal Pump Wiring Pump Control wires Blue is negative (left) Brown is positive(right)
  • Page 16 Chiltrix Inc. www.chiltrix.com Pump Control wires Blue is negative (left) Brown is positive(right) The blue and brown pump CONTROL WIRES are connected to the (+ & -) on the Pump PWM terminal connector at the top of the main control pcb.

  • Page 17: Electrical Connection General

    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 18: Water Flow

    Chiltrix Inc. www.chiltrix.com Electric Connections and Component Locator 1 2 3 4 C4 Pump and V18 SSR connections C4=> Blue is Negative(1) Brown is positive (2) V18 SSR=> Black wire to negative(3) Red wire to positive (4) controller plug in...
  • Page 19 Chiltrix Inc. www.chiltrix.com cx35 System Wiring Diagram HI-Res diagram located on https://www.chiltrix.com/documents/...
  • Page 20 When using a second NON-PWM water pump Generally there should be no need for this, please consult Chiltrix support dept. with any questions. 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 21: Valves G2, G3

    See the Chiltrix Tank Manual before proceeding to install or connecting any DHW or buffer tank. See the Chiltrix Tank Manual for important details and options for using cx35 with DHW, including backup heat options, and anti-legionella function. READ THE CHILTRIX TANK MANUAL BEFORE DESIGNING, CONNECTING, CONFIGURING, OR USING DHW.
  • Page 22 Chiltrix Inc. www.chiltrix.com DHW (Domestic Hot Water) G2 Valve DHW and AC / Heating with two chillers in Parallel G2 and G3 valves use 220v Primary from the cx35. Use conduit and install per local code. Below shows 2x G2 valves, used this way so that Chiller 2 can continue to provide cooling or heating while Chiller 1 deals with any DHW load.
  • Page 23 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 G2 valve should be located as close to the cx50 as practical.
  • Page 24 If the actuator is in any other orientation then install the DHW valve as shown in figure 2 on the previous page and then power up the Chiltrix and with the actuator connected electrically BUT NOT ATTACHED TO THE VALVE, make sure DHW is disabled.
  • Page 25 Chiltrix Inc. www.chiltrix.com G3 Valve: Seasonal Switch Valve G2 and G3 valves use 220v Primary from the cx50. Use conduit and install per local code. The G3 port can be used to control a seasonal switch valve. The seasonal switch valve is used to isolate the floor coils from the fan coils when switching over from heating to cooling.
  • Page 26 Chiltrix Inc. www.chiltrix.com G3 VALVE Seasonal Switch Valve G3 Ports...

  • Page 27: Second Heat Source

    If no backup of any kind is used, leave it at value = 1. E2 may display at times, but there will be no action taken. • DO NOT USE ELEMENTS IN A BUFFER TANK FOR BACKUP HEATING. SEE CHILTRIX TANK MANUAL. Elements would be used in a buffer tank for *emergency heat* not for backup heat. •...

  • Page 28: External T-Stat Control

    Chiltrix Inc. www.chiltrix.com Onboard External Relay/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 of the cx35 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 29 C63 is X06 AC heating switch mode status; 0=OPEN; 1=CLOSE C64 is X07AC cooling switch mode status; 0=OPEN; 1=CLOSE NOTE: Using this relay control option will NOT override inputs from the Chiltrix standard wired controller unless p111 is enabled. See the Psychrologix manual for important additional information if this applies to you.

  • Page 30: System Filling/Purging

    Chiltrix Inc. www.chiltrix.com System filling with Propylene Glycol and water At or near the cx35 a flush/fill valve assembly must be installed. This can be made with three ball valves and a couple hose fittings. If you don’t already have a fill kit for use with solar thermal, hydronic, or chiller systems, you can easily create one with the following Bill of materials: All Pex fittings are available at www.supplyhouse.com...
  • Page 31 Chiltrix Inc. www.chiltrix.com Purging Air From DHW Tank & Fan Coils If a DHW tank is installed, the G valve should be the first device on the loop as shown unless there is a V18 (which would always be in front of the G valve, The G2 valves should always be as close to the cx35 as possible.

  • Page 32: Using The Controller/Operation

    Chiltrix Inc. www.chiltrix.com Standard Controller (Included with all cx35 Units) 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 33 Chiltrix Inc. www.chiltrix.com cx35 Desktop Settings: Chiltrix heat pump setting for space heating/cooling are always set for return temperature, with a steady-state leaving temperature +/- 9F Standard Settings: Space cooling: 54F (note, this implies a leaving temperature of 44F) Space heating: For Chiltrix supplies AHU/FCU 96F (Note this implies a 105F leaving temperature.
  • Page 34 Chiltrix Inc. www.chiltrix.com cx35 Desktop Click the arrow ">" button to go to next page.

  • Page 35: Settings Menu

    Chiltrix Inc. www.chiltrix.com Click “Setting” button, and you will enter the system setting page. Then you select the language, set time and Administrator settings. Settings Menu...
  • Page 36 Chiltrix Inc. www.chiltrix.com Language Screen Screen Saver...

  • Page 37: Time Setting

    Chiltrix Inc. www.chiltrix.com Touch Screen Fixing (Calibration) Time Setting...

  • Page 38: Timer Function

    Chiltrix Inc. www.chiltrix.com Back Light Setting Timer Function Click “Timer” button, you can set the heat pump to turn on and off times, you can select different working modes for different time periods. There are total 4 periods, (8 points), in the timer setting.
  • Page 39 Chiltrix Inc. www.chiltrix.com Timers 1 and 2 set to Heating Mode with no times set Timers 3 and 4 set to Heating mode with no times set...
  • Page 40 Chiltrix Inc. www.chiltrix.com Setting the mode for timer 1, same menu for timers 1-4 Timer 1 turned off, timers 1-4 use the same menu...

  • Page 41: Administrator Functions And-Parameters

    Chiltrix Inc. www.chiltrix.com Timer 1 Start time and Days of the week selected (TU and WE), timers 1-4 use the same menu Administrator Functions Click “Administrator” button, you need to enter the password “2222” to enter the “P” parameters setting page as shown below.

  • Page 42: Mode Switching

    Chiltrix Inc. www.chiltrix.com Mode Click “Mode” at homepage, you will enter mode selection page. To select the desired mode, press the corresponding button. There are 5 standard modes available with DHW enabled, plus an AU Setting. Auto Heating Target Curve Function For HEATING AU configuration see https://www.chiltrix.com/dynamic-heat-reset/...
  • Page 43 Chiltrix Inc. www.chiltrix.com Error Log Error Log above shown with no errors Error Log above shown with sample errors...
  • Page 44 To access the Error Codes touch the “ERROR” button from the desktop. Suggested/supported Settings: Space cooling: 54F (note, this implies a leaving temperature of 44F) Space heating: For Chiltrix supplier AHU/FCU 96F (Note this implies a 105F leaving temperature. Max recommended temp 111F (120F leaving temperature DHW: Max 120F...

  • Page 45: P-Parameters, C-Parameters And Error Code Lists

    Chiltrix Inc. www.chiltrix.com P- Parameters Power-down recovery function 0：off；1：on Single / three phase selection 0：Single-phase power supply Three-phase power supply Power frequency 0：50HZ； 1：60HZ Heat source selection 0：Geo； 1：Air source Heating temperature control method 0：Method 1 : 1：Method 2 Defrost method selection 0：Method 1 : 1：Method 2...
  • Page 46 Chiltrix Inc. www.chiltrix.com P-Parameters Electric heater start delay minute 5-15min SSR Ramp Up rate 1-20min Automatic heating temperature 0-17℃ Automatic cooling temperature 0-28℃ Allowed defrost coil temperature -20~5℃ -4℃ hot water frequency limitation 2~10= max frequency 20~100% AC heating AU mode highest temp 30~50℃...
  • Page 47 Chiltrix Inc. www.chiltrix.com P-Parameters AC water flow switch type selection 0：Normal Water flow switch； 1：Water flow volume meter sensor 2:DN50 water flow sensor 3: New flow sensor SEN-HZG1WA AC minimum water flow 3-80L/m Water source Water flow switch type selection 0：Normal Water flow switch；...
  • Page 48 Chiltrix Inc. www.chiltrix.com P-Parameters night mode ending point 0-23（for relative time） Model selection 0~255 Whether to use high and low pressure transmitter 0 Disabled; 1 Used temperature difference to control C4 water pump speed EEV min open degree Manual Virus Killing 0,normal;1,forced;(Automatic recovery of 0...
  • Page 49 Chiltrix Inc. www.chiltrix.com C Parameters Coil Temp -30~97℃ compressor discharge temp -30~128℃ ambient temp -30~97℃ Suction temperature -30~97℃ Plate heat exchanger inlet temperature -30~97℃ AC outlet water temp -30~97℃ Solar temperature -30~97℃ Compressor current value(Tested by main PCB) 0.00~30.00A(show P4 if C09>16A)
  • Page 50 Chiltrix Inc. www.chiltrix.com C Parameters Heating Method 2 target temperature -30~97℃ Running returning lubrication oil function. 1：On； 0： Off fan type 0：AC fan；1：EC fan EC fan motor 1 speed 0~3000 EC fan motor 2 speed 0~3000 water pump types 0：AC WATER PUMP；1：EC WATER PUMP...

  • Page 51: Error Codes

    Chiltrix Inc. www.chiltrix.com Error Codes Compressor discharge high temp protection Outdoor air temp sensor error Outer coil pipe temp sensor error Pipe returned gas sensor error indoor refrigerant pipe temp sensor error Coil high temp protection solar water temp sensor error...
  • Page 52 Chiltrix Inc. www.chiltrix.com Error Codes voltage protection IPM Fault Compressor Drive Fault Compressor over current protection 1(DC current on U,V,W wire of compressor pins,checked by IPM) IPM Overheat PFC Fault DC bus overvoltage DC bus undervoltage AC input over or under voltage...

  • Page 53: Dynamic Outdoor Reset Control

    Chiltrix Inc. www.chiltrix.com Dynamic Outdoor Reset Control (AU of HEAT) The Chiltrix heat pump unit is equipped with an automatic outdoor reset function that can be accessed via the onboard controller. Advantages & Misconceptions of Using Outdoor Reset Most people in the radiant heating industry will tell you that outdoor reset is used to get more BTU delivery from the radiant system on a day when the radiant system can't deliver enough BTUs to keep up with the load, and they use outdoor reset to crank up the radiant heat operating temperature to 120F, or higher.
  • Page 54 Chiltrix Inc. www.chiltrix.com How to Use Chiltrix Dynamic Outdoor Reset Control (AU of Heat) Use With or Without V18-B Backup Heat Use the free Excel curve development worksheet tool to create the proper curve and discover correct parameter settings for P48 and P49. The tool is located at https://www.chiltrix.com/dynamic-heat-reset...

  • Page 55: Auto Switch-Over

    Chiltrix Inc. www.chiltrix.com How to Use Automatic Switch-Over This is an on-board function and does not require a separate add-on controller to operate. This function allows the cx to automatically select its mode, either heating, cooling, or standby (off), according to outdoor temperature.

  • Page 56: Commissioning

    P5 and possibly P1 errors. Call tech support if any error codes are displayed on the wired controller. Chiltrix Tech Support hours of operation, M-F, 9 am-6 pm EST, 757-410-8640 ask for tech support. MOST IMPORTANT! 1.

  • Page 57: Footprint/Placement Dimensions

    Chiltrix Inc. www.chiltrix.com...
  • Page 58 Chiltrix Inc. www.chiltrix.com...

  • Page 59: Extending Wires

    Chiltrix Inc. www.chiltrix.com Extending Wires If you need to extend any of the sensor wires, control wires, MODBUS wires, please follow the instructions below as the wires are very sensitive to resistance and EMF. Cut and strip the wire ends (1) that you wish to extend.

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