Rev. 0608
9
Thermostatic expansion valve location
This device is located on the same side as the refrigeration
stub. A Sporlan balanced port expansion valve model
is furnished as standard equipment, unless otherwise
specified by customer.
expansion valve adjustment
Expansion valves must be adjusted to fully feed the
evaporator. Before attempting any adjustments, make
sure the evaporator is either clear or very lightly covered
with frost, and that the fixture is within 10°F of its expected
operating temperature.
measuring the Operating superheat
1. Determine the suction pressure with an accurate
pressure gauge at the evaporator outlet.
. From a refrigerant pressure temperature chart,
determine the saturation temperature at the
observed suction pressure.
3. Measure the temperature of the suction gas at the
thermostatic remote bulb location.
4. Subtract the saturation temperature obtained in step
No. from the temperature measured in step No. 3.
The difference is superheat.
5. Set the superheat for 5°F - 7°F.
T-sTaT location
T-STATS are located within the electrical raceway. Refer
to diagram below.
Tstat & Ballast
ISM
T-Stat Locations
Tstat Location
ISM
Plan View
Thermometer location
Thermometer is located at the warmest part of the unit
as determined by the factory. This thermometer is factory
installed.
Refrigeration (Cont'd)
