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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.
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A potential convenience or secondary usage for this upgraded E tab function is to provide
an easy manual means for rapidly bringing up the building or room temperature if the
system has been set for non-occupancy. By installing a pushbutton between W and E tab,
the homeowner can easily activate all stages on to the end of the thermostat cycle.
Warning: This is all stages on, no temperature monitor. This should only be used in this
manner when it is a very cold building from non-occupancy, the outdoor temperature is
quite low with low temperature rise coming from the heat pump.
Stat override timer (SOT) – this is an option WarmFlo internal timer which can be programmed
with WF analyzer to select a roomstat 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.
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SOT S – this is the longer set timer which allows transfer to standby if something might
have happened to the electric system.
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SOT E – this must be shorter time, is typically used to overcome morning setback pickup
issues. In other words, if you would field download 30 minutes and you program the
setback stat to begin bringing up the temperature 30 minutes prior to the wakeup time;
and the system is not at the new higher temperature at the 30-minute point it will
automatically jump to DT Flat in order to more rapidly raise the building temperature.
However, this also means you will be "short cycling" the HP compressor during other
heat calls. The maximum run time for the compressor is then about 30 minutes at any
time of the day or at any particular heat call.
Note: Beginning approximately 7-04 the SOT S has been factory default at 90 minutes
for all dual heat chip codes.
MU – this is an internal timeout function which begins when all stages are on at 100%. Anytime
the electric section is operating with all stages on at 100% for a continuous operating time greater
than the programmed MU (3 initial minutes), the system automatically switches to standby. MU
= 00 is a disable setting. The amber LED on the main WarmFlo board will correctly follow
electric or standby. On the Interface module (EZ3, etc.) the "gas call" LED also will be on, but
the "utility off-peak" LED remains on.
Electro-Mate or strip heat undersizing – there are provisions within WarmFlo and within
Electro's various heating products to add partial resistance heating section to heat pumps. To
provide optimum operation and comfort, the setup functions need to be activated accordingly.
Default program code chip "HPDF" has been designed for this application. As a field setup, you
probably want MU to be relatively short (30 minutes), the ODT mode will be "EL to SB" with an
ODT dial switch temperature selection at about the combination heat pump and Electro-Mate
output energy (probably 0°) or position #3.
Electro-Mate only, no heat pump – there are two default chip codes, EMW or EMA.
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EMW – all normal WarmFlo functions and modulation, front dial, etc.
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Must be auto standby, no wood furnace.
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EMA – does not use an OT sensor, at each thermostat call outlet temperature goes to
a preset value (commonly called electronic aquastat). This value is the "min. warm
air" adjustment (inside main board).
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The decal table shows the outlet temperature at the various "temperature"
settings.
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The plug-in Analyzer OT Function must be "disable" (no OT sensor).
11/05/2008
2
HD320
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