Advertisement
•
Y - The HP compressor relay coil, when the Y terminal goes to 24-volt, the compressor
and its internal functions should be on.
•
RV - Reversing valve, determines outdoor unit heat or cool mode. See below for logic
selection. This may also be called "0".
•
C – 24-volt system common, same as furnace fan center.
7. Heat Pump Reversing Valve Logic - Depending upon the heat pump manufacturer, the "RV" may
be different logic for heating and cooling. This is selectable on the WF-EZ3 circuit board, top.
•
Heating – RV = 24-volt, high – jumper header between center pin and H.
•
Cooling – RV = 24 volt, high – jumper header between center pin and C.
Factory set at 24 volt = Cooling
WarmFlo II Controller Connection
1. Sensor connection – see page 4 "WarmFlo II Sensors".
2. WF II Controller is located on the cabinet right side door.
3. Plug the 4-wire pigtail from WF-EZ3 into the left center connector. Do not force on the connector,
the connector only plugs in one way and should slide on easily.
4. Plug the yellow wire and connect to the WarmFlo II "Y" tab located on the top left portion of WF
controller.
5. The harness also comes with a violet wire, the violet wire is used as a "built-in" ODT for heat pump
compressor shut-off function. Connect the violet wire to the WarmFlo II tab "HP ODT" or T4 (this
wire must be connected).
th
6. The cable has a 7
wire (brn/yel) which is simply an extra wire for special stat field hookups and
options. Reference "Special Applications/Installation Instructions" part of this manual.
7. 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. The upper right circuit board mounting screw is a
static ground protection point.
If your installation has special application and hookup conditions please see section located in
this manual called "Special Application/Installation instructions"
CONTROLLER SETUP OR PROGRAMMING
Important - Located on the WF II board is a firmware chip that determines a specific set of defaults (see
table below). However, this can be programmed (altered) with optional PC software (ET-SOFT-WF) or a
plug-in WarmFlo analyzer (WF-ANZ*). As part of the WF II system this chip represents critical defaults
and settings that make your system operate correctly. It is a critical portion of the installation to verify
that the chip code sent with your WF II is correct for your intended application. The chip code is located
on a white label in the center of the WF II controller.
The table below represents the typical WF II chip codes and defaults for use with a WF-EZ3. Please use
this table as a reference as you setup your WF II. See Operational Information and last section of this
manual for further information on these defaults.
Code
HPDH
50°, 38°, 36°, 34°
HPDF
50°, 38°, 36°, 34°
HPEL
50°, 38°, 36°, 34°
11/01/2007
Information - The WarmFlo II controller receives its operating power
through the plug-in wire harness. The yellow wire is simply the thermostat
"call for heat" signal being forwarded to the WarmFlo II controller.
Chip Code Reference Table
Stg. Enable
MU Time
11
ODT Mode
90
HP W/STEP
30
EL to SB
00
HP
OT Function
DT cal.
DT cal.
DT cal.
HI320
Advertisement
