JOHNSON CONTROLS
58
FORM100.50-EG12 (918)
Electrical Data
ELECTRICAL SERVICE SIZING
In order to determine the electrical service required for the cooling only Series 100 single
package unit, use the appropriate calculations listed below from UL 1995. Based on the
configuration of the single package unit, the calculations will yield different minimum cir-
cuit ampacity (MCA) and maximum overcurrent protection (MOP).
Using the following load definitions and calculations, determine the correct electrical siz-
ing for your unit. All concurrent load conditions must be considered in the calculations, and
you must use the highest value for any combination of loads.
Load Definitions:
• LOAD1
is the current of the largest motor – compressor or fan motor.
• LOAD2
is the sum of the remaining motor currents that may run concurrently with
LOAD1.
• LOAD3
is the current of the electric heaters – zero for cooling only units.
• LOAD4
is the sum of any remaining currents greater than or equal to 1.0 amp.
Use the following calculations to determine MCA and MOP for units supplied with a single-
point power connection:
MCA = (1.25 x LOAD1) + LOAD2 + LOAD3 + LOAD4
MOP = (2.25 x LOAD1) + LOAD2 + LOAD3 + LOAD4
If the MOP does not equal a standard current rating of an overcurrent protective device,
then the marked maximum rating is to be the next lower standard rating. However, if the
device selected for MOP is less than the MCA, then select the lowest standard maximum
fuse size greater than or equal to the MCA.
TABLE 27 -
COMPRESSOR DATA (R-410A)
MODEL
COMPRESSOR
NOMINAL VOLTAGE
QTY
MODEL
208/230
460
575
RLA
LRA
RLA
LRA
RLA
LRA
YPAL 70 TON
6
ZP120
33.3
239
17.9
125
12.8
80
YPAL 75 TON
2
ZP154
51.3
300
23.1
150
19.9
109
4
ZP137
48.1
245
18.6
125
14.7
100
YPAL 80 TON
4
ZP154
51.3
300
23.1
150
19.9
109
2
ZP137
48.1
245
18.6
125
14.7
100
YPAL 90 TON
4
ZP182
55.8
340
26.9
173
23.7
132
2
ZP154
51.3
300
23.1
150
19.9
109
YPAL 105 TON
3
ZP182
26.9
173
23.7
132
3
ZP236
30.8
229
25.0
180
NOTE:
*RLA data is per compressor
Содержание YPAL070
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