Outdoor reset sensor can help your
heat pump work better.
An outdoor reset added to your thermostat
can help your heat pump work better by adjusting the temperature of your
house with the outside temperature.
This feature can be added to
the Honeywell Y594 Thermostat. It is easy if your thermostat only has a
heat function since some of these thermostats will have a heat thermostat
on the left and a cool on the right.
The thermistor costs about $10 and
the heater is a 1K ohm resistor. With a little skill it can be added to
your existing Y594 for about $1.
For more information please contact us.
Image of the honeywell C815A outdoor reset thermistor
resistance curve. Notice the the "knee" of the curve is about 40 degrees
F at 1000 ohms.
This page will be updated soon
Blower: usually a squirrel cage centrifugal air moving device. Will move
large volumes of air relatively quiet. Will use less energy with more back
Fan: a paddle type air moving device used where noise is not a major consideration.
Will use more energy with more back pressure.
Combustion blower: A blower used on high efficiency furnaces or oil burners
to move combustion air. usually 1/20 to 1/6 horsepower.
OEM: Original equipment manufacturer.
Horsepower: 746 watts
KW Kilowatt (1000 watts) or 3400 BTUs per hour
RPM: revolutions per minute.
Service factor: the extent to which a motor can be safely overloaded beyond
its name plate ratting without over heating.
Air over horsepower: The rating of a motor assuming air flow through the
windings usually as a result of the air moving device.
SAE: Society of Automotive Engineers.
Ton 12,000 BTUs per hour of heating or cooling
Good Luck Scott
If your heat pump forms
ice outside in the heat mode click
If your air conditioner or heat pump ices
in the cooling mode click
If you have
water leaking problems with your air conditioner
click here to solve it.
To identify your gas furnace parts click
For other heat pump problems click
For other heating system problems click
Any other questions feel free to contact us by
any of the means below. good luck Scott.
If you were looking for Ice
Machine repairs click here.
are looking for solar energy click here.
Written By: Scott
Meenen N3SJH of:
This text written by: Scott Meenen * G & S Mechanical
G&S MECHANICAL SERVICES.
Specializing in Mechanical, Controls
and Electrical Modifications Of
Heating, Air-conditioning, Refrigeration,
Ice Production and Food preservation.
Anything having to do with Heat and Energy.
Serving MD, DC, and Northern
Contact us by pager: 1-877-467-2914
Email us at:
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