Suburban DynaPack S Series Architects And Engineers' Manual page 32

START UP/SYSTEM PERFORMANCE
Suburban DynaPack A&E Manual 07/2019 Rev.6
Cooling Adjustments
The only cooling adjustment that can be made is in the blower speed.
1. Turn the unit on in the cooling mode and allow to operate until stable.
2. Place a thermometer in the return air opening and another in the
3. The a/c unit must operate until condensate water is coming off of the
4. Proper cooling operation is obtained if there is a 20 degree Fahrenheit
5. If the air temperature drop is greater than 22 degrees then switch the
NOTE: If the cooling speed and the heating speed are the same, then the
heating pigtail from the board and the cooling pigtail from the board can be
attached to the same pigtail from the motor. Cap and secure with electrical
tape all unused blower speed pigtails.
SYSTEM PERFORMANCE
The unit has been factory tested to insure proper air conditioning
performance. If it is suspected that there is a refrigerant leak in the unit then
the charge can be checked by placing a thermometer on the liquid line near
the filter dryer and connecting a pressure gauge to the high side pressure
fitting. Use a R410A saturated temperature chart to calculate the liquid
subcooling. The unit is properly charged if it is operating between 8 and 14
degrees subcooling at any outdoor temperature above 65° F. The system should
be checked to see that none of the wiring worked loose during shipment.
DYPA12AC3A*** Charging Chart
CHART 1
supply air opening as close to the unit as possible.
evaporator coil. Measure the return and supply air temperatures.
drop in air temperature through the a/c unit.
cooling speed to the next higher speed. If the air temperature drop is
less than 18 degrees then switch the cooling speed to the next lower
blower speed.
32
For DYPA12 units only, check
for proper charge as described in
the following:
On DYPA12 models, place
a thermometer on the
compressor suction line above
the accumulator. Connect a
pressure gauge to the suction
line pressure port. Use a R410A
saturated temperature chart to
calculate the suction super heat.
Acceptable values are shown on
the chart on the left.
(continued on next page)
See Chart 1.