1. DL manuals
  2. Navien
  3. Water Heater
  4. NPE-180A
  5. Installation Manual

Navien NPE-180A Installation Manual

Manual is about: NPE series Condensing Water Heaters

Summary of NPE-180A

  • Page 1

    Installation manual add-on controller installation kit npe-180a/240a this device is designed to work with npe-180a/240a models only. Warning all installations should be done only by a qualified expert and in accordance with the appropriate navien manual. Installing an electric appliance with imprope...

  • Page 2

    When installing this product: 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for the application. 3. Installers must be traine...

  • Page 3: Contents

    Contents 3 contents 1. About the comfortair + 5 1.1 included items 5 1.2 specifications 6 1.3 csa p.9 –11 rating 6 1.4 device layout 7 1.4.1 wiring connection table 7 1.4.2 dip switch function table 7 2. Installing the device 8 2.1 basic principles 8 2.2 installing the device in an npe-180a/240a wat...

  • Page 4

    4 contents 5.3 parameter table 24 5.4 configuring water heater functions 25 5.4.1 pump exercise operation time (p04) 25 5.4.2 burn delay time (p.05) 26 5.4.3 pump post purge time (p.06) 27 5.4.4 outdoor reset control (p07–p10) 28 6. Maintenance 34 7. Appendix 35 7.1 npe-180a/240a pressure drop curve...

  • Page 5: 1. About The Comfortair

    About the comfortair + 5 1. About the comfortair + navien comfortair + is an add-on controller for the navien npe-180a/240a water heaters. It adds input and output functions to the npe-180a/240a water heaters for a combination application where space heating and domestic hot water (dhw) are supplied...

  • Page 6: 1.2 Specifications

    6 about the comfortair + 1.2 specifications refer to the following table for product specifications. Items specifications model name kdo-a100 device type add-on controller for navien npe-180a/240a water heaters installation type snap-on (onto the npe-180a/240a water heater pcb tray) connections main...

  • Page 7: 1.4 Device Layout

    About the comfortair + 7 1.4 device layout refer to the following diagram for the product layout. 1.4.1 wiring connection table terminal wiring connection ahu w1 connect to ahu w1 ahu w2 connect to ahu w2 ahu r connect to ahu r flow switch flow switch input terminal t/s w1 connect to thermostat w1 t...

  • Page 8: 2. Installing The Device

    8 installing the device 2. Installing the device this section provides information required to install the comfortair + add-on controller in an npe-180a/240a water heater. Warning ensure that you have turned off the power to the water heater before installing the device. 2.1 basic principles the fol...

  • Page 9: Warning

    Installing the device 9 warning a mixing valve must be installed in the system in order to limit the dhw output temperature and prevent scalding. Setting the mixing valve to 115–120℉ is recommended. Install a spring check valve for vertical pipe runs. Do not use a swing check valve with vertical pip...

  • Page 10

    10 installing the device 3. Remove the two screws holding the pcb tray in place and pull out the pcb tray from the unit. 4. Verify the current pcb version of the npe water heater. For old pcb version kdc-330-5m p12: the pcb must be replaced with an updated version. Remove all the cables and connecto...

  • Page 11: Caution

    Installing the device 11 6. Align the two latches at the back of the comfortair + with the two catch bars at the back of the water heater’s pcb tray. Then pivot the comfortair + onto the pcb tray until the latches snap-on to the catch bars. 7. Connect cables to the comfortair + . For more details, r...

  • Page 12: 3. Wiring The Device

    12 wiring the device 3. Wiring the device this section provides information required to plan and install the system wiring. 3.1 system wiring examples refer to the following wiring diagrams to properly install wiring for various setups you may need in your system. Set dip switch (sw) #3 as specified...

  • Page 13

    Wiring the device 13 3.1.2 1-stage thermostat / 1-stage control heating system set dip switch (sw) #3 to ‘off’ to configure the system to use a 1-stage thermostat / 1-stage control. 3.1.3 2-stage thermostat / 2-stage control heating system set dip switch (sw) #3 to ‘on’ to configure the system to us...

  • Page 14: Combo System)

    14 wiring the device 3.1.4 configuring the cooling system (for a heating / cooling combo system) to configure the cooling system, connect the thermostat y terminal to the ahu cooling input terminal y, and connect the thermostat r terminal to the ahu r output..

  • Page 15: 3.2 Cable Connections

    Wiring the device 15 3.2 cable connections follow the instructions below to connect the cables to the comfortair + . 3.2.1 connecting the outdoor temperature sensor cable an outdoor temperature sensor is supplied with the navien comfortair + installation kit. Insert the exposed wire into the termina...

  • Page 16

    16 wiring the device 3.2.2 connecting the thermostat cables the comfortair + receives input signals from thermostats to control the ahu. Insert the fork connector into the contact. Then tighten the terminal screw with a screwdriver..

  • Page 17

    Wiring the device 17 3.2.3 connecting the flow switch cables insert the fork connector into the contact. Then tighten the terminal screw with a screwdriver..

  • Page 18

    18 wiring the device 3.2.4 connecting the main control connector to connect the comfortair + to the navien npe-180a/240a water heater, use the 13- pin main control connector supplied with the navien comfortair + . Connect one end of the cable to the connector socket on the comfortair + pcb. Then, co...

  • Page 19: 4. Configuring The Device

    Configuring the device 19 4. Configuring the device this section provides the information required to set the desired options for the npe- 180a/240a water heater system with the comfortair + add-on controller. 4.1 pump control options caution the drawings in this instruction are intended only as a g...

  • Page 20: Warning

    20 configuring the device a system with the internal circulation pump set the 2-way valve inside the water heater to ‘ext’. For more information about settings, refer to “selecting a recirculation mode (“a” model only)” in the water heater installation manual. Warning an anti-scalding device must be...

  • Page 21: 4.2 Dhw Priority Options

    Configuring the device 21 4.2 dhw priority options refer to the following options to configure the system’s dhw supply modes. 4.2.1 dhw priority mode when the system is configured for the dhw priority mode, space heating does not operate if there is dhw demand (the flow switch is ‘closed’). Set the ...

  • Page 22

    22 configuring the npe-180a/240a water heater 5. Configuring the npe-180a/240a water heater this section provides information required to properly configure the npe-180a/240a water heater to setup and utilize the functions provided by the comfortair + add-on controller. 5.1 entering the service info...

  • Page 23

    Configuring the npe-180a/240a water heater 23 5.2 entering the r&d information menu this section describes how to enter the r&d information mode to configure various parameters and control system functions. 5.2.1 entering the r&d information menu follow the instructions below to enter the r&d inform...

  • Page 24: 5.3 Parameter Table

    24 configuring the npe-180a/240a water heater 5.3 parameter table the following table lists the parameters used to configure the water heater system functions. No. Mode display 4 pump exercise operation time 5 burn delay time 6 pump post purge time 7 outdoor low temperature set-point 8 outdoor high ...

  • Page 25

    Configuring the npe-180a/240a water heater 25 5.4 configuring water heater functions this section describes the water heater functions and provides the information required to configure the parameters for the desired operation. 5.4.1 pump exercise operation time (p04) the pump exercise function is d...

  • Page 26

    26 configuring the npe-180a/240a water heater 5.4.2 burn delay time (p.05) this function is used to set the burner delay time at an optimal value for the air handler application. If there is no burner delay time, the water heater might turn on or off once or twice during the air handler delay time. ...

  • Page 27

    Configuring the npe-180a/240a water heater 27 5.4.3 pump post purge time (p.06) this function is used to set the post purge time after a combustion cycle is completed. To change the pump post purge time: 1. In the parameter information time mode, use the up (+) or down (-) buttons to select p.06. Th...

  • Page 28

    28 configuring the npe-180a/240a water heater 5.4.4 outdoor reset control (p07–p10) the outdoor reset control feature can be used to enhance energy efficiency while maintaining optimal heating performance. Outdoor reset control automatically changes the space heating temperature setting based on the...

  • Page 29

    Configuring the npe-180a/240a water heater 29 outdoor low temperature set-point (p.07) to change the outdoor low temperature set-point: 1. In the parameter information time mode, use the up (+) or down (-) buttons to select p.07. Then, press the info button to enter the outdoor low temperature set-p...

  • Page 30

    30 configuring the npe-180a/240a water heater outdoor high temperature set-point (p.08) to change the outdoor high temperature set-point: 1. In the parameter information time mode, use the up (+) or down (-) buttons to select p.08. Then, press the info button to enter the outdoor high temperature se...

  • Page 31

    Configuring the npe-180a/240a water heater 31 heating min set-point (p.09) to change the heating min set-point: 1. In the parameter information time mode, use the up (+) or down (-) buttons to select p.09. Then, press the info button to enter the heating min set-point mode. 2. In the heating min set...

  • Page 32

    32 configuring the npe-180a/240a water heater heating max set-point (p.10) to change the heating max set-point: 1. In the parameter information time mode, use the up (+) or down (-) buttons to select p.10. Then, press the info button to enter the heating max set-point mode. 2. In the heating max set...

  • Page 33

    Configuring the npe-180a/240a water heater 33 2-stage t/s output heat-capacity (p.11) models with the 2-stage air handler control function (w1, w2) can use a 2-stage thermostat or can be automatically controlled by the comfortair + controller (if the dip switch # 3 is off). When using the automatic ...

  • Page 34: 6. Maintenance

    34 maintenance 6. Maintenance the navien npe-180a and npe-240a water heaters that are used in the dhw/heating systems should be properly maintained and flushed on an annual basis. Please see the npe water heater service manual for more details regarding annual servicing and maintenance..

  • Page 35: 7. Appendix

    Appendix 35 7. Appendix this section provides additional information to be considered when you design a hydronic system using an npe-180a/240a water heater. 7.1 npe-180a/240a pressure drop curve 7.2 npe-180a/240a flow rate graph.

  • Page 36

    36 appendix 7.3 npe-180a/240a pump p-q curve when the system uses an internal circulation pump with the npe-180a/240a water heaters, the flow rate may vary depending on the type and capacity of the ahu in use. If the system uses an internal circulation pump with the npe-180a/240a water heaters or pu...

  • Page 37

    Limited warranty navien, inc. 37 limited warranty navien, inc. Warranty period navien products come with a limited warranty covering parts. The following warranty periods begin to run from the date of original installation. The date of original installation must be provided to navien, and upon reque...

  • Page 38

    38 limited warranty navien, inc. Warranty exclusions navien’s limited warranty shall be void in the event of an occurrence of any of the following: improper installation, failure to install in strict compliance with the installation manual procedures, installed by a non-licensed installer, and insta...

  • Page 39: Installation Manual

    Installation manual getting service if your comfortair + requires service, you have several options for getting service: contact technical support at 1-800-519-8794 or on the website: www.Navien.Com. For warranty service, always contact technical support first. Contact the technician or professional...