1. Manuals
  2. Brands
  3. Taco Electronic Solutions Manuals
  4. Controller
  5. iWorx HPU3
  6. Application manual

Taco Electronic Solutions iWorx HPU3 Application Manual

Water source heat pump controller
Hide thumbs Also See for iWorx HPU3:
Table of Contents

Advertisement

Quick Links

Download this manual
HPU3 Water Source Heat Pump Controller
Self-Contained Interoperable Controller Model UCP-1 for Software Version 2
SUPERSEDES: December 15, 2014
Plant ID: 001-4056
HPU3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Purpose of This Guide . . . . . . . . . . . . . . . . . . . . . . . . . 3
Representations and Warranties . . . . . . . . . . . . . . . . . 4
Applicable Documentation . . . . . . . . . . . . . . . . . . . . . . 4
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . 5
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Static Electricity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FCC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Before Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
About this Document . . . . . . . . . . . . . . . . . . . . . . . . 5
Inspecting the Equipment . . . . . . . . . . . . . . . . . . . . 5
Equipment Location . . . . . . . . . . . . . . . . . . . . . . . . . 6
Selecting a Power Source . . . . . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mounting the Device . . . . . . . . . . . . . . . . . . . . . . . . 6
Routing Cabling to the Device . . . . . . . . . . . . . . . . . 7
Grounding the Device . . . . . . . . . . . . . . . . . . . . . . . 7
Wiring Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Connecting Input Devices . . . . . . . . . . . . . . . . . . . . 9
Connecting Output Devices . . . . . . . . . . . . . . . . . . 10
Other Connections . . . . . . . . . . . . . . . . . . . . . . . . . 11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Application Description . . . . . . . . . . . . . . . . . . . . . . . . 13
© 2015 Taco Electronic Solutions, Inc.
Application Guide

Table of Contents

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . 14
Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Heating Sequence . . . . . . . . . . . . . . . . . . . . . . . . . 16
Cooling Sequence . . . . . . . . . . . . . . . . . . . . . . . . . 18
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Dehumidification with Reheat . . . . . . . . . . . . . . . . 20
Auxiliary Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Global Unit Enable. . . . . . . . . . . . . . . . . . . . . . . . . 21
Humidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Local Backup Schedule . . . . . . . . . . . . . . . . . . . . . 21
Runtime Accumulation. . . . . . . . . . . . . . . . . . . . . . 21
Reversing Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Alarms and Events. . . . . . . . . . . . . . . . . . . . . . . . . 22
Hydronic Zone Interaction . . . . . . . . . . . . . . . . . . . 23
Automatic Configuration . . . . . . . . . . . . . . . . . . . . 23
Controller Identification . . . . . . . . . . . . . . . . . . . . . . . 23
Network Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . 32
505-035
EFFECTIVE: June 30, 2015
1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the iWorx HPU3 and is the answer not in the manual?

Questions and answers

Related Manuals for Taco Electronic Solutions iWorx HPU3

Summary of Contents for Taco Electronic Solutions iWorx HPU3

  • Page 1: Table Of Contents

    Mechanical ....... 12 Application Description ......13 © 2015 Taco Electronic Solutions, Inc.
  • Page 2 HPU3 THIS PAGE LEFT BLANK INTENTIONALLY 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 3: Hpu3

    This application manual is written for: ORKS • Users who engineer control logic • Users who set up hardware configuration • Users who change hardware or control logic • Technicians and field engineers 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 4: Representations And Warranties

    REPRESENTATIONS AND WARRANTIES This Document is subject to change from time to time at the sole discretion of Taco Electronic Solutions, Inc. All updates to the Document are available at www.taco-hvac.com. When installing this product, it is the reader’s responsi- bility to ensure that the latest version of the Document is being used.

  • Page 5: Installation Instructions

    The instructions in this manual are for the HPU3 module which supports a liquid source heat pump. Inspecting the Equipment Inspect the shipping carton for damage. If damaged, notify the carrier immediately. Inspect the equipment for damage. Return damaged equipment to the supplier. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 6: What Is Not Included With This Equipment

    3.Using a small drill bit pre-drill the mounting holes. 4.Using two #6 pan head screws, mount the controller to the panel. 5.Wire the controller (See Routing Cabling to the Device). 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 7: Routing Cabling To The Device

    For best performance, connect the power supply common terminal (T38) to the same external point as the ground terminal (T40). 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 8: Wiring Information

    WARNING: Terminals 6, 9, and 12 are connected internally on all HPU3 controllers. Disconnect ALL power sources when installing or servicing this equipment to prevent electrical shock or equipment dam- age. Figure 2: HPU3 Wiring Example - Power Sourcing 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 9: Connecting Input Devices

    To connect the equipment switch to the digital input, attach one wire of the contact to EQS (T5) and the other wire to the adjacent common (T6). This must be a dry contact switch. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 10: Connecting Output Devices

    The reheat valve output must be connected to a 24 VAC pilot relay if the load is greater than 1 Amp. If the load is less than 1 Amp, connect the reheat valve to RH (T22) and the adjacent COM (T21). 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 11: Other Connections

    • Dry Contact • Configurable as Disabled, Normally Open, or Normally Closed • 5 Volts DC Max Outputs Stage 1, Stage 2, Reversing Valve, Fan, and Dehumidification • 24 Volts AC 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 12: Mechanical

    • Flash: 48 Kilobytes • SRAM: 8 Kilobytes • Termination: 0.197” (5.0 mm) Pluggable Terminal Blocks, 14-22 AWG Environmental • Temperature: 32 °F to 140 °F (0 °C to 60 °C) 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 13: Application Description

    The controller maintains the comfort level to a user-defined setpoint during the occupied period, and uses setup and setback values during the unoccupied period to maintain the space temperature. An optional backup schedule is pro- vided for cases when the LCI is not available. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 14: Sequence Of Operation

    Next, the space setpoint is calculated from the zero energy band and the heating setpoint. Occupied Mode ZebOcc SpaceSp OccupiedHeatSp ------------------- - Unoccupied Mode ZebUnocc SpaceSp UnoccupiedHeatSp -------------------------- - 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 15 Occupied Mode  CalcCoolingSp OccupiedCoolingSp SpOffset  CalcHeatingSp OccupiedHeatingSp SpOffset  EffectiveSp SpaceSp SpOffset Unoccupied Mode  CalcCoolingSp UnoccupiedCoolingSp SpOffset  CalcHeatingSp UnoccupiedHeatingSp SpOffset EffectiveSp SpaceSp 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 16: Heating Sequence

    If the space temperature remains below the heating control band for an additional time period, the next available stage is turned on. This cycle continues until all available stages have been energized. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 17 Reversing Valve = HEAT T2 = Stage Cycle Time x 2 Stage 2 On Stage 2 Off Stage 1 On Stage 1 Off Temperature Heating Control Band Unoccupied Space Heating Setpoint Setpoint 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 18: Cooling Sequence

    When the space temperature drops below the space setpoint, all of the compressor stages turn off immediately; the stage time and minimum on time are ignored. During unoccupied periods, the cooling setpoint is adjusted upwards through a separate unoccupied cooling setpoint. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 19: Commissioning

    • Humidification • Reheat • Auxiliary Heat To enable Commissioning, configure the Enabled parameter in the Commissioning screen to “Yes.” Note that when commissioning is enabled, all values are overridden. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 20: Fan Operation

    To disable auxiliary heat without removing the ASM or CSM controllers from the network, configure the auxiliary heat setpoint to a value well below any possible outdoor air temperature. The auxiliary heat setpoint may be configured as low as -459.7°F (absolute zero). 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 21: Global Unit Enable

    The total runtime is accumulated for the compressor and fan outputs. The runtimes can be used to indicate that main- tenance is required on the equipment controlled by these outputs. The runtime can be reset by an operator or mainte- nance person once servicing has been performed. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 22: Reversing Valve

    To help eliminate nuisance alarms when the controller switches between the unoccupied and occupied modes of oper- ation, space temperature alarms are not reported for 30 minutes following the switch. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 23: Hydronic Zone Interaction

    The HPU3 allows a network manager to modify the Network Input Variables for the purpose of overriding configuration, operation, inputs and outputs of the controller. Values written to the Network Input Variables have priority over normal controller operation. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 24 Note: The HPU3 makes no attempt to interpret the outputs; assigning meaningless outputs may have unpredictable results. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 25 = AO 3 (pin 32) not used fpOut[4] SNVT_lev_percent: 32767 fpOut[0] = not used 0% to 100% 32767 fpOut[1] = not used 32767=no effect 32767 fpOut[2] = not used 32767 fpOut[3] = not used 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 26: Inputs

    Name Range Description Unit Status Structure as defined in a table below Status of the unit Output Status Structure as defined in a table below Status of the outputs 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 27: Configuration

    Heat Fan Runtime Limit 0 to 65,535 hours 1000 hours Runtime limit for Fan Comp. Runtime Limit 0 to 65,535 hours 1000 hours Runtime limit for the compressor stages 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 28 55 °F (12.8°C) Specifies the target Supply Air Temperature (4.4 to 26.7°C) Heating Setpoint 60 to 100°F 85 °F (29.4°C) Specifies the target Supply Air Temperature (15.5 to 37.8°C) 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 29 This screen displays all the Mod Fan settings and provides access to edit these parameters from a single screen. Setting Range Default Description 0.0% to 100.0% 5.0% Proportional band control constant 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 30 Off, On Set Dehumidification Output (DHUM) Humidification Off, On Set Humidification Output (HUM) Reheat Off, On Set Reheat Output (RH) Auxiliary Heat Off, On Set Auxiliary Heat Output (AUX) 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 31: Alarms

    – Green when there is network activity – Off when there is no network activity Service – Illuminated when the service pin is depressed or when a controller gets configured by the LCI. 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.

  • Page 32: Troubleshooting Tips

    HPU3 is a member of the controller. If there is no CCU2 or LHP2 con- ditioned air. nected, then the Unit Enable input of the ASM2 must detect water flow (On). 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 33 1.Make sure controllers, sensors, and power supplies are connected and communicating to desired devices. 2.Record precise hardware setup indicating the following: Version numbers of application software. Device and/or firmware version number. A complete description of difficulties encountered. Notes: 505-035, Effective: June 30, 2015 © 2015 Taco Electronic Solutions, Inc.
  • Page 34 Taco Electronic Solutions, Inc. is a subsidiary of Taco, Inc. Visit our web site at: http://www.taco-hvac.com Printed in the USA iWorx® and iView® are registered trademarks of Taco Electronic Solutions, Inc. © 2015 Taco Electronic Solutions, Inc. LON, LONWORKS, & LONMARK are trademarks of Echelon Corporation...

Table of Contents