Suburban DynaPack S & H Series Owner's Manual 06/2020 Rev.2
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10. Your recorded value on input must be or- 2% of the rated input. If it is not then adjust the manifold pressure lower to reduce
the input or higher to increase the input. Do not go outside of 3.2” to 3.8” water column.
11. The only adjustment for LP gas is to maintain the 10” water column manifold pressure.
12. Turn off the unit, close the manual gas valve, and remove the pressure gauge. Make sure the gas valve pressure port plug screws
are tightened along with the gas valve regulator cap. Replace the burner compartment door.
13. Open the manual gas valve and turn on the furnace.
14. Place a thermometer in the return air along with one in the supply air as close to the furnace as possible. Once the supply air
temperature is constant, record both temperatures. Subtract the return air temperature from the supply air temperature. This
difference is the temperature rise of the furnace.
15. Compare the measured temperature rise to the nameplate range. If the measured rise is lower than the nameplate minimum, then
select the next lower blower speed for the heating speed. If the measured temperature rise is above the nameplate maximum, then
select the next higher blower speed for the heating speed.
16. If a new blower speed was selected then re-measure the temperature rise and repeat the adjustment if needed.
3.4 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 supply air opening as close to the unit as possible.
3. The a/c unit must operate until condensate water is coming off of the evaporator coil. Measure the return and supply air temperatures.
4. Proper cooling operation is obtained if there is a 20 degree Fahrenheit drop in air temperature through the a/c unit.
5. If the air temperature drop is greater than 22 degrees then switch the 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.
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.
3.5 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.
A: ROOM AIR BLOWER
The Dynapack unit contains a 5 speed motor to allow a range of adjustments so the proper cooling and heating speeds can be obtained
after installation. For "S" Series units, Table 2 and for "H" Series units, Table 5 list the factory settings for the heating and cooling speeds
based on capacity. The factory settings should work for most installations but the actual ductwork will dictate the best settings for your
installation. The indoor motor is permanently lubricated and does not require periodic re lubricating.
The room air blower is controlled by the unit control board in addition to the wall thermostat. With the thermostat fan switched to ‘AUTO’,
the room air blower will operate only when there is a call for heat or cooling. If the thermostat fan switch is switched over to ‘ON’, then
the room air blower will run continuously. The control board will over ride the wall thermostat when switched to ‘AUTO’. There are various
delay timings built into the board to delay starting and stopping of the room air blower to increase comfort and energy efficiency.
The furnace also contains safety limits that will operate when an abnormal condition is detected. These limits serve a particular purpose
and should not be tampered with by relocating or wired around. If the furnace does not operate, or the room air blower does not come on,
or the a/c unit does not operate, then call a licensed service technician to diagnose and repair.
The Dynapack unit is designed certified to operate up to 4500 feet above sea level without modification for both the USA and Canada.
Call Technical Service at 229-273-3636 for installations above 4500 feet.
B: OPERATION IN EXTREME COLD OR SNOWY AREAS
In those areas where the ambient temperature is consistently below 0° F, indoor comfort can be improved by adjusting the heating blower
speed to obtain the maximum temperature rise allowed per the unit data plate.
A Dynapack unit installed on the ground floor must have the furnace intake and exhaust above the anticipated snow fall for that area.
Higher snowfall than anticipated will block the furnace intake and lead to the unit shutting off.
