DRY-O-TRON ®
MODEL #:
SERIAL #:
I.D.
D
ELECTRICAL RATING
460 V ac, 3 ph, 60 Hz
COMPRESSOR LRA RLA
COMPRESSOR LRA RLA
COMPRESSOR LRA RLA
COMPRESSOR LRA RLA
BLOWER MOTOR HP FLA
BLOWER MOTOR HP FLA
BLOWER MOTOR HP FLA
COND. FAN MOTOR HP FLA
COND. FAN MOTOR HP FLA
PUMP MOTOR HP F LA
ENTHALPY MOTOR HP FLA
ELECTRIC HEATER kW A
Max. L.A.T. (°F)
SERVICE POWER
SPACE HEATING COIL
PSIG Max.
MCA A MAX. FUSE/ CKT. BKR.*
15
A
*(HACR type per NEC)
R-22 FACTORY CHARGE
lbs
AIR VOLUME CFM
BELT SIZE
WIRING DIAGRAM
REFRIGERANT DESIGN PRESSURES: HIGH/LOW 300/150 PSIG
FABRIQUÉ AU CANADA / MADE IN CANADA
REF.:
POOL # 1: ft² POOL # 3: ft²
E.W.T.: °F E.W.T.: °F
POOL # 2: ft² POOL # 4: ft²
E.W.T.: °F E.W.T.: °F
AIR TEMP.: °F R.H.: %
R-22 TOTAL SYSTEM CHARGE:
lbs
MAX. LENGTH OF REF. LINES (ONE WAY) ft
BETWEEN D.O.T. & REMOTE CONDENSER:
LINE SIZE:
AIR COOLED COND. MODEL #:
HOT GAS: in
LIQUID: in
CFM
BOX A
Supply- Air
Flow Rate
CFM
BOX C
Outdoor- Air Intake
Flow Rate
CFM
BOX D
Exhaust- Air
Flow Rate
%
BOX J
%
BOX H
6. Copy your nameplate value AIR VOLUME into BOX A at right.
7. Copy the desired outdoor-air intake rate for occupied periods from the
project specifications into BOX C at right.
8. Multiply the value in BOX C times 100 and divide by the value in BOX A.
Enter the result in BOX J.
(BOX C) x 100 ÷ (BOX A) = BOX J
9. If the value in BOX J is less than or equal to the value in BOX H, then a unit
equipped with outdoor-air intake will suffice for that amount of outdoor air.
If the value in BOX J is greater than the value in BOX H, or if the unit is not
equipped with an outdoor-air intake, then other arrangements must be made for that
amount of outdoor air flow. Do not attempt to exceed the maximum.
10. Multiply the value in BOX C by 1.1. Enter this value in BOX D.
(BOX C) x 1.1 = BOX D
Example3: A unit with A/C option is installed at a site where the minimum outdoor air temperature
is 35°F and the maximum outdoor temperature is 102°F. The unit nameplate says AIR
VOLUME is 3000 CFM. The job specifications call for 700 CFM of outdoor air during
occupied periods.
BOX H would be 19%. BOX A would be 3000 CFM. BOX C would be 700 CFM.
BOX J would be 23%. Twenty-three percent is larger than 19%, therefore other
arrangements must be made to bring in that amount of outdoor air.
NOTICE
Risk of unit damage. Risk of building damage from water leakage.
Apply the requirements applicable to your unit. Do not confuse options.
32°F
0°C
5%
35%
30%
25%
20%
15%
10%
5%
35%
30%
25%
20%
15%
10%
50°F
10°C
100°F
38°C
91°F
32°C
150°F
66°C
allowable outdoor-air
intake rates for units
without
air-conditioning option
allowable outdoor-air
intake rates for units
with A/C option
(includes area below)
Allowable flow rate of outdoor air entering
a unit, as a percentage of AIR VOLUME
Outdoor-Air
Temperature
38°F
3°C
Example1
Example2
Example3
T.A.B.
0°F
-18°C
-20°F
-29°C
Determine Airflow Rates
1.
Note that only units with outdoor-air intake ports can accept outdoor air. Outdoor air must never enter a return
duct.
2. Note that outdoor air may have to be heated (by others) before entering a unit.
3. On the chart below, draw a vertical line from the lowest expected outdoor air temperature that will enter the unit.
4. On the chart below, draw a vertical line from the highest expected outdoor air temperature that will enter the unit.
5. Determine if the unit has the air-conditioning option. Using the correct curve in the chart below, select the lowest
allowable percentage of outdoor air for the curve between the low and high temperatures.
Example1: For A/C mode and entering outdoor-air temperatures between 40°F and 97°F, the lowest percentage is 25%.
Example2: For no A/C mode and entering outdoor-air temperatures between 32°F and 95°F, the lowest percentage is 15%.
5. Enter this lowest value for your conditions in BOX H.
allowable outdoor-air
intake rates for units
with A/C option and
either O/A preheat or
the SmartSaver option
(includes area below)
allowable outdoor-air
intake rates for units
without A/C option but
with either O/A preheat
or with the
SmartSaver option
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