the lockout relay automatically resets after 15 minutes
simply disconnect power to the unit momentarily
just push reset button. they are all manual resets
the technician has to fix the unit before reset
dependant on ambient temperature
26*F if the ambient temperature is not known
There is not temperature difference
the seasonal energy efficiency ratio
Dividing the BTUs removed by the watts consumed during the cooling season
how highly efficient the unit is verses cost of the unit
heat produced divided by voltage rating on the compressor
The system will not properly remove the humidity from the conditioned space.
the second stage of the thermostat can override the first stage
the outdoor coil may become frosted
the system not get the conditioned space cool enough
superheat and subcooling
vapor into the suction line (unless its a blend)
liquid into the suction line if it is a blend
maintain 500 microns for 15 minutes
maintain 200 microns for 10 minutes
triple evacuate with nitrogen
pump it down for 3 hours
use a hacksaw to remove the old valve
to prevent oxidation while brazing purge the system with refrigerant
Use heat paste and wet rags while brazing in the new valve.
use locking pliers to hold the new valve body while brazing
a dual run capacitor, which allows a small amount of current to flow through the windings
a small amount of current is passed through the start capacitor to heat the start winding.
the crankcase heater is wired to an intermittent timer.
One leg of supply voltage is directed through the start winding
airflow in CFM is below normal range
airflow in CFM is within normal range
this is not enough information to calculate airflow.
airflow in CFM is above normal range
the peak hours of power consumption in your area
high fire on the gas valve.
The second heating stage of the indoor thermostat
the 1st outdoor thermostat
a maximum of 30 minutes
as long as it takes to get the ice off the coil
a maximum of 10 minutes
15 minutes if its hard ice
600 to 700 CFM
400 to 450 CFM
200 to 300 CFM
150 to 225 CFM
use temperature rise on emergency heat mode
assume 450 CFM per minute for all heat pumps
Multiply the horsepower of the motor times the square circumference of the blower wheel.
use temperature rise in cooling mode
lower the indoor fan speed
increase the ouytdoor fan speed
decrease the outdoor fan speed
Increase the indoor fan speed
选择要在Apple App Store上查看的Topgrade应用程序。