Bryant 569J 08G Series Installation, Start-Up And Service Instructions Manual page 15

External Devices —
The 569J control transformers provide 24- - v NEC Class 2
power sources to energize external control devices. These
devices will include the indoor fan motor contactor (or
control relay). These devices may also include liquid line
solenoid valve, economizer control relay, supplemental
electric heater contactors or control relays and other devices
selected by system designer.
UNIT V ---Ph---Hz
208/230--- 3--- 60
460--- 3--- 60
569J*08G/H
575--- 3--- 60
UNIT V ---Ph---Hz
208/230--- 3--- 60
460--- 3--- 60
569J*08G/H
575--- 3--- 60
Legend and Notes for Table 7
LEGEND:
FLA --- Full Load Amps
LRA --- Locked Rotor Amps
MOCP --- Maximum Over Current
Protection
NEC --- National Electrical Code
RLA --- Rated Load Amps
} Units are suitable for use on electrical systems where voltage
supplied to the unit terminals is not below or above the listed
limits.
NOTES:
1. The MCA and Fuse values are calculated in accordance with
The NEC. Article 440.
2. Motor RLA and LRA values are established in accordance
with Underwriters' Laboratories (UL). Standard 1995.
3. The 575--- v units are UL, Canada--- listed only.
4. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply
voltage is greater than 2%. Use the following formula to de-
termine the percentage of voltage imbalance.
Table 7 – Electrical Data — 569J*08G/H 60 Hz Units
WITH POWERED CONVENIENCE OUTLET
VOLTAGE
COMPRESSOR
RANGE }
MIN MAX RLA LRA
187 253 24.0 186
414 506 12.6 100
518 633 9.9 78
WITHOUT POWERED CONVENIENCE OUTLET
VOLTAGE
COMPRESSOR
RANGE
}
MIN MAX RLA LRA
187 253 24.0 186
414 506 12.6 100
518 633 9.9 78
Control transformer TRAN1 provides control power through
terminal R to C on the field connection terminal strip TB for
supply fan motor interlock. This source may also be used to
energize economizer control relay and electric heater
contactors or relays. Maximum available power is 20 va.
Check concurrent loadings by external control devices. If the
maximum concurrent loading exceeds 20 va, purchase and
install the accessory Transformer- - Relay package (available
for 208/230 and 460- - v units).
POWER
OFM (ea)
SUPPLY
QTY FLA MCA
2 1.5 38
2 0.8 20
2 0.7 16
POWER
OFM (ea)
SUPPLY
QTY FLA MCA
2 1.5 33
2 0.8 18
2 0.6 14
Example: Supply voltage is 230-3-60
max voltage deviation from average voltage
% Voltage Imbalance = 100 x
AB = 224 v
BC = 231 v
AC = 226 v
(224 + 231 + 226)
Average Voltage =
3
= 227
Determine maximum deviation from average voltage.
(AB) 227 – 224 = 3 v
(BC) 231 – 227 = 4 v
(AC) 227 – 226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
= 1.76%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
15
DISCONNECT SIZE
MOCP FLA LRA
60 37 197
30 19 106
25 15 84
DISCONNECT SIZE
MOCP FLA LRA
50 31 192
25 16 104
20 13 82
average voltage
681
=
3
4
227