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step up function. Reference manual "Special Installation/Application Instructions" for
additional assistance.
ii.
Gas/oil as emergency – depending upon the action within the HP stat sub-base, the "A1"
tab on the main WarmFlo board could be used as an input to cause standby mode.
However, even though you apply 24 volts to "A1" the system still needs a call for heat
(in this case probably W). In other sub-bases the "E" wire turns on and off as a
temperature controlled function. Support drawing HH320 can provide additional hookup
information. Assuming only two sub-base types exist, a hookup summary would be:
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.
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 table below represents the typical WF II chip codes and defaults for use with a WF-LGR3. 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°
MU Time - Standby or Gas Furnace Operation - Whenever all four stages are full on (if it is not a
four-stage Electro-Mate, this simply means full Electro-Mate output), and operating at a continuous 100%
for a fixed delay (see Chip Code Reference Table, MU Time); the WarmFlo II controller automatically
terminates all electric and starts the gas furnace. The gas furnace will be used to complete the heating
cycle until room thermostat heat call ends.
During the next heat call, the heat pump and Electro-Mate stages again attempt to produce the WarmFlo
II desired temperature. Again, if everything is at 100% plus the MU time, the gas furnace takes over.
HPDH Chip Code – Electro-Mate Sized for Complete Heating Load
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.
Stage 1 = 5Ø°F
MU Time – Set to 90 minutes
11/01/2007
Stat "E" direct function of lever, still need W – connect Stat E to A1 and route stat W
through "COM" (T7) and adjacent "SB" (T8) tabs, see HH320 page 2.
Stat "E" function of temperature bulb – requires an additional 2-pole, 24-volt relay at
WF-LGR enclosure. The relay coil goes to stat "E" (and "C"), one contact goes across
"SB" tab (T17, left center) and COM on the LGR3 board. The second contact goes
across furnace fan center TB "R" and "W", see HH320 page 1.
Chip Code Reference Table
Stg. Enable
MU Time
2 = 38°F
17
ODT Mode
90
HP
30
EL to SB
00
HP
3 = 36°F
4 = 34°F
OT Function
DT cal.
DT cal.
DT cal.
HI320
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