Belt Drive Blower Motor And Drive Data; Pg. # 26 Static Resistances; Electric Heater Cfm Limitations - York DJ 036 Technical Manual

TABLE 25: BELT DRIVE BLOWER MOTOR AND DRIVE DATA
MOTOR
BLOWER
MODEL
RANGE
SIZE
(RPM)
HP FRAME
DJ036 600/920 1-1/2
DJ048 790/1120 1-1/2
DJ060 850/1220 1-1/2
1. All motors have solid bases and are inherently protected. These motors can be selected to operate into their service factor because they are located
in the moving air, upstream of any heating device.
TABLE 26: STATIC RESISTANCES
DESCRIPTION
1,3
ECONOMIZER
7-15KW
ELECTRIC
1
HEATERS
20-30KW
2
COOLING ONLY
1. Deduct these resistance values from the available external static pressure shown in SUPPLY AIR BLOWER PERFORMANCE Tables.
2. Add these resistance values to the available static resistance values on SUPPLY AIR BLOWER PERFORMANCE Tables.
3. The pressure through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct system is less than
0.25 IWG, the unit will deliver less CFM during full economizer operation.
TABLE 27: ELECTRIC HEATER CFM LIMITATIONS
UNIT MODEL SIZE
NOMINAL TONS
3
4
5
30
1
ADJUSTABLE MOTOR PULLEY
OUTSIDE
DESIG-
DIA.
NATION
(IN.)
56 1VL40 2.7-3.7
56 1VL40 2.7-3.7
56 1VL40 2.7-3.7
1000 1200 1400
0.07 0.08 0.09
0.04 0.05 0.06
0.06 0.07 0.08
0.08 0.10 0.12
VOLTAGE
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-1-60
208/230-3-60
460-3-60
575-3-60
FIXED BLOWER PULLEY
PITCH OUTSIDE
BORE DESIG-
DIA. DIA.
(IN.) NATION
(IN.) (IN.)
2.4-3.4 5/8 AK74 7.2
2.4-3.4 5/8 AK61 5.9
2.4-3.4 5/8 AK56 5.4
RESISTANCE, IWG
CFM
1600 1800 2000
0.11 0.13 0.15
0.07 0.08 0.10
0.09 0.11 0.13
0.14 0.16 0.18
MINIMUM SUPPLY AIR CFM
HEATER SIZE NOMINAL KW
5 7
1100 1100 1200
1100 1100 1200
- 1100 1200
- - 1200
1300 1300 1300
1300 1300 1300
- 1300 1300
- - 1300
1600 1600 1600
1600 1600 1600
1600 1600 1600
- 1600 1600
036-21687-002-A-1105
PITCH
BORE DESIG-
DIA.
(IN.) NATION
(IN.)
7.0 1 A39
5.7 1 A36
5.2 1 A36
2200 2400 2600
0.17 0.20 0.23
0.12 0.14 0.16
0.15 0.17 0.20
0.20 0.23 0.26
10 15 20
1200 1300
1200 1300
1200 1300
1200 1300
1300 1300
1300 1300
1300 1300
1300 1400
1600 1600
1600 1600
1600 1600
1600 1600
Unitary Products Group
BELT
(NOTCHED)
PITCH
LENGTH QTY.
(IN.)
40.3 1
37.3 1
37.3 1
2800 3000
0.26 0.30
0.19 0.22
0.23 0.26
0.29 0.32
30
-
-
-
-
-
-
-
-
1600
1600
1600
1800