Specifications

ManualsBrandsYork ManualsConditionersDM150

035-17377-000 REV A (0201)

Unitary Products Group 41

NOTES FOR TABLE 27 THROUGH TABLE 46:

• Blower performance includes dry coil and two-inch fil-

ters.

• Blower performance for gas heat includes the maximum

number of heat tubes available for each tonnage.

• ESP (External Static Pressure) given is that available for

the supply and return air duct system. All internal resis-

tances have been deducted from the total static pressure

of the blower.

AIR BALANCE

Start the supply air blower motor. Adjust the resistances in

both the supply and the return air duct systems to balance

the air distribution throughout the conditioned space. The job

specifications may require that this balancing be done by

someone other than the equipment installer.

CHECKING AIR QUANTITY

1. Remove the dot plugs from the duct panel (for location of

the dot plugs see figure 10).

2. Insert eight-inches of 1/4 inch metal tubing into the air-

flow on both sides of the indoor coil.

NOTE:

The tubes must be inserted and held in a position per-

pendicular to the air flow so that velocity pressure will not

affect the static pressure readings.

3. Use an inclined manometer to determine the pressure

drop across a dry evaporator coil. Since the moisture on

an evaporator coil can vary greatly, measuring the pres-

sure drop across a wet coil under field conditions could

be inaccurate. To assure a dry coil, the compressors

should be de-activated while the test is being run.

NOTE:

De-energize the compressors before taking any test

measurements to assure a dry evaporator coil.

4. The CFM through the unit with clean 2 inch filters can be

determined from the pressure drop indicated by the

manometer by referring to the curves in the supplement.

5. After readings have been obtained, remove the tubes

and replace the dot plugs.

TABLE 47: INDOOR BLOWER SPECIFICATIONS

MODEL

MOTOR MOTOR SHEAVE BLOWER SHEAVE

BELT

HP RPM Eff. SF Frame Datum Dia. (in.) Bore (in.) Model Datum Dia. (in.) Bore (in.) Model

DM078

1-1/2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 9.5 1 AK99 A58

2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 7.5 1 AK79 A55

DH078

1-1/2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 9.5 1 AK99 A58

2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 7.5 1 AK79 A55

DM090

1-1/2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 9.0 1 AK94 A57

2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 7.5 1 AK79 A55

DH090

1-1/2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 9.0 1 AK94 A57

2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 7.5 1 AK79 A55

DM102

2 1725 80% 1.15 56 3.4 - 4.4 7/8 1VM50 9.0 1 AK94 A56