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Electro Industries WARMFLO II Installation And Operations

Dual heat system
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W
ARM
Furnace Interface Controller and Control Voltage Installation
Application – Heat Pump Multi-Wire Thermostat
Basic or Single Speed Heat Pump
As in previous interface modules, this is the plug-in controller for Electro-Mate EM-WU***** or EM-
WD***** plenum heater. Mechanical installation information is contained within companion installation
manual EI703 or EI707.
Also accompanying each system is a specific control program "chip". This is typically part of ordering
information and should be listed on packing slip. A listing of these "chip codes" is in the controller setup
sections of this document.
This is an upgraded and improved WF-LGR3. Improvements are the response of field requests.
Thermostat wiring terminal block, pass through
Improved stat emergency heat function, no longer requiring extra relay
Reversing valve detection relay, positive WarmFlo and gas furnace interrupt during
cooling (RV logic pin jumper setup required)
Front panel "cool" light
Equipped for ECM blower motor, direct Y connection
Faster defrost response
Easier single cable plug-in to the upgraded (10-pin connector) WarmFlo II board
Reference Field Service Bulletin 1094 which relates to heat pump units with RV logic high for heating –
this unit identified as "Rev A" and has a control board identifier "WFIH46708A" includes revisions
relating to stat emergency "E" hookup and operation, cool light function, etc. Also study page 7,
determine the need for "stat-B" pin jumper.
Any application –
this design assumes the connected room thermostat cannot and does not output an
emergency "E" function during cooling. During any and all cooling operations, this controller board "E WF"
and "E GAS" tab must be at 0 volts.
Drawings:
HH340
HD320
HH339 page 1
01/10/2008
F
Dual Heat System
and Operations
WF-LGR4
®
LO
II
HI321

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Summary of Contents for Electro Industries WARMFLO II

  • Page 1 Equipped for ECM blower motor, direct Y connection Faster defrost response Easier single cable plug-in to the upgraded (10-pin connector) WarmFlo II board Reference Field Service Bulletin 1094 which relates to heat pump units with RV logic high for heating –...

  • Page 2: Table Of Contents

    WF-LGR4 & WF II Wiring & Setup Chip Code: HPDH HPDF HPEL OPERATION INDICATORS Furnace Interface Module WarmFlo II Controller HANDHELD ANALYZER/LAPTOP SOFTWARE SPECIAL APPLICATION/INSTALLATION For Various Heat Pump, Multi-Speed, Multi-Stage Furnaces, Blower Options, Oil Furnace, etc. OPTIONAL ACCESSORIES TROUBLESHOOTING Drawings Included:...

  • Page 3: Introduction

    If your application does not include dual heat with standby furnace, but electric heat with an air handler, do not use this WarmFlo II series or this installation manual. Contact factory for other models (EM-WE series, WF-DH*** kits, etc.).

  • Page 4: Mechanical Installation

    When cycling on the hi-limit probe, the WarmFlo II supply sensor basically gets confused because at one point it is way up in temperature and then the elements simply disappear and it dips down, the net result probably is switching over to standby at premature intervals.

  • Page 5: Em-Wd***** Downflow Application

    When cycling on the hi-limit probe, the WarmFlo II supply sensor basically gets confused because at one point it is way up in temperature and then the elements simply disappear and it dips down, the net result probably is switching over to standby at premature intervals.

  • Page 6: Wiring Installation

    Please reference manual EI707 pages 2 and 3. Low Voltage WarmFlo II Sensors Located within each WarmFlo control are two sensing probes, OT (outdoor sensing) and ST (supply sensing) necessary for proper operation and installation of the WarmFlo systems. Without proper installation of these probes the WarmFlo system will not operate correctly.
  • Page 7 OT & ST Sensor Reconnection 1. A plug-in terminal block is provided for wiring convenience. 2. Both red wires are terminated in the same single screw (+), and both white or green wires are terminated in the single common screw (COM). Each appropriate black wire is terminated in the appropriate OT and ST screw.

  • Page 8: Wf-Lgr4 & Wf Ii Wiring & Setup

    04-04 (ARL 3074). On the 10-pin connector may be a dummy cap plug, remove and expose all 10 pins. b. If with this installation you do not have WarmFlo II main board with the 10-pin header, you can either update the WarmFlo board or call factory for special instructions for cutting up the cable and terminating with female ¼”...
  • Page 9 Caution – 24 volts common grounding – the installer must determine whether the furnace fan center COM screw terminal has a good ground bond (not simply furnace skin). If the fan center COM is not adequately grounded, use the pigtail green wire (WarmFlo board, upper, C tab) for a ground bond to the Electro-Mate cabinet power source ground lug.

  • Page 10: Chip Code

    Application: 8-wire standard heat pump thermostat, WF II Electro-Mate, Heat Pump, gas/oil furnace using ODT to control heat pump only – The WarmFlo II controller with this chip has outside temperature reference for enabling the electric heat staging (except “E” tab). The outside temperature (actual sensor) must be below these values before the stage will come on, independent of supply sensor requirement.

  • Page 11: Hpdf

    Application: 8-wire standard heat pump thermostat, WF II Electro-Mate, Heat Pump, and gas/oil furnace using ODT setting as full electric control – The WarmFlo II controller with this chip has outside temperature reference for enabling the electric heat staging (except “E” tab). The outside temperature (actual sensor) must be below these values before the stage will come on, independent of supply sensor requirement.

  • Page 12: Hpel

    Application: 8-wire standard heat pump thermostat, WF II Electro-Mate, Heat Pump, and gas/oil furnace. This code will only allow gas/oil on during utility control – The WarmFlo II controller with this chip has outside temperature reference for enabling the electric heat staging (except “E” tab). The outside temperature (actual sensor) must be below these values before the stage will come on, independent of supply sensor requirement.
  • Page 13 heat loss curve or the higher the operating efficiency. The closer a selected setting is to G, the steeper the heat loss curve or the lower overall heat pump system efficiency. If knob is turned to “full” the WF II will automatically go to “DT flat”.

  • Page 14: Operation Indicators

    WarmFlo II Main Board Strip Heat Disable – To maximize heat pump system energy efficiency and preventing “accidental” unnecessary resistant strip heat when it is not required, this WarmFlo II disables or locks out strip heat elements based upon outdoor temperature.
  • Page 15 (at the end of the cycle) the relay output immediately goes off and strip heat is turned off and not necessarily stepped down as shown by the WarmFlo II monitor Red LED’s. This is a safety feature; strip heat cannot be accidentally kept on by WarmFlo II internal logic if there is no “Y” input. 01/10/2008...

  • Page 16: Handheld Analyzer/Laptop Software

    STAT OVERRIDE TIMER (SOT) This is a field option internal timer which can be field programmed with WF analyzer to select a roomstat cycle run time. If this downloaded run time (typically 90 minutes) is exceeded before the thermostat is satisfied, the system automatically switches to either full electric elements or standby.

  • Page 17: Special Application/Installation

    Wood Furnace or Other Non-Automatic Standby Furnace WarmFlo II works ideally with a wood furnace because it modulates (or adds to) the electric element to maintain a fixed temperature output. Thus the wood fire can “die down” and the supply sensor (ST) will make up electric element heat to keep the building comfortable.

  • Page 18: Optional Accessories

    Caution: This is not a temperature checking situation. If you proceed with this function, the sensor automatically goes to 32°F. 2. Use WarmFlo II Analyzer test set or purchase special PC software disc and PC serial port cable. These plug-in devices allow direct readout of both temperatures, allows a visual determination of WarmFlo II internal temperature settings, and can be used to offset either temperature sensor for troubleshooting and demonstration purposes.
  • Page 19 “hang in conditioned space” and attempt to run this system. 5. Acquiring the WarmFlo II Analyzer test set or the PC software and serial port hook-up cable (see previous page) is a positive tool for understanding and troubleshooting the WarmFlo II controller.
  • Page 21 WarmFlo Terminology, Key Terms ST – supply temperature sensor. This is the warm air or duct sensor (boiler – supply outlet water). OT – outdoor temperature sensor. Provides the WarmFlo board with outdoor temperature information. DT – desired temperature to overcome building heat loss, the diagonal line on heat loss curve. The front panel efficiency knob selects one of 8 curves to determine DT at specific real time OT.
  • Page 22 New 2008 – version 2.38, 10.03, 12.04, 15.03, etc. – once activated, it remains for the completion of the heat call. Thus it only needs to be a temporary jumper (5 seconds or more) to step on all stages. User needs to remember to cycle the roomstat to cancel this E tab function.
  • Page 23 Note: With an Electro-Mate it is assumed there is always standby or gas furnace. For non-automatic or wood, suggest using EMA and select the desired outlet temperature. ODT dial switch mode – within the program chip default and Analyzer/software programming this function defines the use of the dial switch on the circuit board labeled “ODT”.
  • Page 24 Blower operation – the air handler or fossil fuel furnace blower is operated from its own fan center (G screw). The activation of this “G” input is either directly from a heat pump (total electric system) roomstat “G” screw or in the case of dual heat from the Furnace Interface module (WF-EZ3, LGR4, EM3, etc.).
  • Page 25 Normal Heating Operation – Whenever the WarmFlo II Y tab is at 24 volt (with reference to “C”), the WarmFlo II controller begins turning on the Electro-Mate elements (assume outdoor temperature is below disable value) and automatically controls the warm air temperature as sampled by the warm air sensor (ST).
  • Page 26 Also on the next call for heat, the WarmFlo II controller remembers what stages were on and starts at that point. A clamp-on amp meter at the service input can be used to “visualize” the Stage 1 modulation and/or Stages 2, 3, and 4 functions.
  • Page 27 Chip Code Reference Table for your application (within the various colored page sections). These tables show the various defaults associated with that particular code. With WarmFlo II a number of field re-programming possibilities and options exist using either PC software or WarmFlo analyzer, reference “WarmFlo Handheld Analyzer/Laptop Software”...
  • Page 29 TWENTY YEAR (20) LIMITED WARRANTY ON SPIN FIN ELEMENTS Electro Industries, Inc. warrants that the spin fin elements of its products are free from defects in materials and workmanship through the twentieth year following date of installation. If any spin fin elements are found to have a manufacturing defect in materials or workmanship, Electro Industries will replace them.
  • Page 30 ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED WITH RESPECT TO ALL PURCHASERS OR OWNERS. ELECTRO INDUSTRIES, INC. IS NOT BOUND BY PROMISES MADE BY OTHERS BEYOND THE TERMS OF THESE WARRANTIES. FAILURE TO RETURN THE WARRANTY CARD SHALL HAVE NO EFFECT ON THE DISCLAIMER OF THESE IMPLIED WARRANTIES.