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All installations and services must be performed by qualified personnel.
16
Read the temperature at header assembly to calculate the superheat. Then read the suction
pressure and then add the line loss of 2 lbs. for 25’ of tubing. Then convert pressure into
temperature.
Next, subtract the converted suction temperature from the measured coil header temperature and
the end result is the superheat.
EXAMPLE:
Measured Temp = 50
o
F
(Off header assembly at 10:00 or 2:00 position) See Figure I.
Measured Pressure = 71PSI + 2PSI = 73PSI which equates to a 43
o
F saturation temperature.
(Measured from pressure port)
(Listed temperature for measured pressure according to R-22 temperature scale on manifold
gauge or R-22 section of pressure temperature chart)
The difference equals the degrees superheat = 7
o
F
All 10 SEER models of Thermo Pride air conditioners should have a 3
o
F to 7
o
F superheat at an
85
o
F to 95
o
F outdoor temperature and a 70
o
F to 80
o
F indoor temperature. The superheat
temperature will not be accurate if the indoor temperature is not within the 70
o
F to 80
o
F range.
Therefore, an indoor temperature within the above range must be achieved before an accurate
superheat can be measured.
MEASURING TEMPERATURE DROP ACROSS THE “A” COIL:
The temperature drop across the coil should be around 15
o
F to 20
o
F difference between inlet and
outlet air. This should be measured as close to the air handler as possible, to eliminate duct
losses.
ELECTRICAL
All wiring must conform to the provisions of local codes or in the absence of local codes with the
provisions of the National Electrical Code, ANSI/NFPA No. 70-Latest Edition and this
instruction manual. Equivalent type wire must be used if any of the original wire supplied with
the unit needs to be replaced A 10 amp time delayed fuse or circuit breaker is recommended.
NOTE: Condensing unit is not included in above amp rating.