Bryant 575A installation instructions Electrical Data, Accessory Electric Heater Data, Ð7Ð

Table 4 Ð Electrical Data

UNIT	NOMINAL VOLTAGE	VOLTAGE RANGE		COMPRESSOR		OFM		POWER SUPPLY		MINIMUM DISCONNECT
575A	(V-Ph-Hz)	Min	Max	RLA	LRA	FLA	MCA		MAX FUSE OR	FLA	LRA
									HACR BRKR AMPS
090	208/230-3-60	187	254	31.5	160	3.1	42.5		50	45	177
	460-3-60	414	508	15.7	80	1.4	21.0		25	25	89

	LEGEND
FLA	Ð Full Load Amps
HACR Ð Heating, Air Conditioning and Refrigeration
LRA	Ð Locked Rotor Amps
MCA	Ð Minimum Circuit Amps
NEC	Ð National Electrical Code
OFM	Ð Outdoor Fan Motor
RLA	Ð Rated Load Amps

Example: Supply voltage is 460-3-60.

AB = 452 v BC = 464 v AC = 455 v

Average Voltage =

452 + 464 + 455

3

=

1371

3

NOTES:

1.In compliance with NEC requirements for multimotor and combina- tion load equipment (refer to NEC Articles 430 and 440), the over- current protective device for the unit shall be fuse or HACR breaker.

2.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 determine the percent voltage imbalance.

= 100 x	max voltage deviation from average voltage
	average voltage

= 457

(AB) 457 2 452 = 5 v (BC) 464 2 457 = 7 v

(AC) 457 2 455 = 2 v Maximum deviation is 7 v. Determine percent voltage imbalance

7

% Voltage Imbalance = 100

457

= 1.53%

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.

Table 5 Ð Accessory Electric Heater Data

UNIT	NOMINAL kW	V-PH-HZ	HEATER	HEATER	MCA*	MOCP*
524A-H			PART NO.	AMPS
	5	240-3-60	CAELHEAT001A00	12.0	25.6	30
		480-3-60	CAELHEAT002A00	6.0	12.3	15
	10	240-3-60	CAELHEAT004A00	24.1	40.7	50
		480-3-60	CAELHEAT005A00	12.0	19.8	25
090	15	240-3-60	CAELHEAT007A00	36.0	55.7	80
		480-3-60	CAELHEAT008A00	18.0	27.4	40
	25	240-3-60	CAELHEAT010A00	60.1	85.8	125
		480-3-60	CAELHEAT011A00	30.1	42.4	60
	35	240-3-60	CAELHEAT013A00	84.0	115.8	175
		480-3-60	CAELHEAT014A00	42.1	57.4	80

	LEGEND
MCA	Ð Minimum Circuit Amps
MOCP	Ð Maximum Overcurrent Protection (Amps)

*Sizes shown are for single-point connection of electric heat accessory and air handler.

NOTES:

1.MCA and MOCP values apply to both standard and alternate factory- supplied motors.

2.Electrical resistance heaters are rated at 240 v or 480 v. To deter- mine heater capacity (kW) at unit nameplate voltage, multiply 240-v or 480-v capacity by multipliers found in table below.

HEATER RATING			ACTUAL SITE VOLTAGE
VOLTAGE	200	208	230	240	400		440	460	480
240	.694	.751	.918	1	Ð		Ð	Ð	Ð
480	Ð	Ð	Ð	Ð	.694	.	840	.918	1

NOTE: The following equation converts kW of heat energy to Btuh: kW x 3,412 = Btuh.

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