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MU Time – Standby or Gas Furnace Operation - Whenever all four stages are full on, 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: 4-wire 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 at 90 minutes
WF II DIAL SETTINGS
Lower right dial switch – min. warm air – The lower inside yellow screwdriver adjustment dial sets a
"floor" or level minimum operating temperature. The supply temperature will never go below this point
independent of outdoor temperature. In other words, this is the flat horizontal line on the warm air versus
outdoor temperature curve. Reference manual "heat loss curve graph".
0 = 90
1 = 92
2 = 94
3 = 96
Top right dial switch - Built-in ODT or Low Temperature Switch-Over – The top inside yellow
screwdriver adjustment dial can be set to terminate the heat pump. Special programming can terminate
heat pump and electric to allow total gas operation below ODT temp. (reference manual WF-ANZ*) .
In addition this defaults as "HP W/STEP". This means below the ODT selected temperature, the Electro-
Mate output goes to "Flat DT" (see last page definition).
The temperature settings related to the "ODT dial" are:
Ø = Disabled, no ODT switch-over
1 = -15°F
2 = -10°F
3 = 0°F
4 = 5°F
COMMENT: If you are using outdoor compressor built-in ODT, set the dial to "0". At no time
can the outdoor compressor built-in ODT and WF II ODT setting (other than 0 = disable) be used
at the same time.
Temperature (Efficiency Dial) – Located on the front cover of the WF II Electro-Mate, the red center
screwdriver adjustment dial has a selection of A through G. These A through G selections represent a
supply temperature point at 0° outdoor. The closer the user or installer selection is to A, the flatter the
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".
11/01/2007
2 = 38°F
Factory set on #3.
4 = 98
5 = 100
6 = 102
7 = 104
5 = 10°F
6 = 20°F
7 = 30°F
12
3 = 36°F
4 = 34°F
Factory set on #3.
HI320
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