Bryant 558F installation instructions

Table 2D — Electrical Data (Units With Convenience Outlet) (558F091, 103, 121, 151) (cont)

558F			VOLTAGE		COMPRESSOR			OFM (ea)				HEATER	ELECTRIC HEAT			POWER SUPPLY				DISCONNECT			SINGLE POINT
	NOMINAL	IFM	RANGE			(ea)					IFM										SIZE*
UNIT												MODEL NO.											BOX P/N
SIZE	V-PH-Hz	TYPE	Min	Max	Qty	RLA	LRA	Qty	Hp	FLA	FLA	CRHEATER---A00	Nominal	FLA		MCA		MOCP†		FLA		LRA	CRSINGLE---A00
													kW
												NONE	—/—	—/—		61.0/ 61.0		70/ 70**		65/ 65		364/364	—
												017	7.8/10.4	21.7/	25.0	61.0/	61.0	70/	70**	65/	65	364/364	012
		STD									10.6	010	12.0/16.0	33.4/	38.5	61.0/	66.8	70/	70**	65/	65	364/364	012
												012	24.0/32.0	66.7/	77.0	102.6/114.9		110/125**		94/106		364/364	012
												012 and 017	31.8/42.4	88.4/102.0		129.7/146.2		150/150**		119/135		364/364	015
	208/230-3-60		187	254	2	19	156	2	1/4	1.4		010 and 012	37.6/50.0	104.2/120.3		149.6/169.0		150/175**		138/156		364/364	015
												NONE	—/—	—/—		65.4/ 65.4		80/ 80**		70/ 70		383/383	—
												017	7.8/10.4	21.7/	25.0	65.4/	65.4	80/	80**	70/	70	383/383	012
		ALT									15	010	12.0/16.0	33.4/	38.5	66.5/	72.3	80/	80**	70/	70	383/383	012
												012	24.0/32.0	66.7/	77.0	108.1/120.4		110/125**		99/111		383/383	012
												012 and 017	31.8/42.4	88.4/102.0		135.2/151.7		150/175**		124/140		383/383	015
												010 and 012	37.6/50.0	104.2/120.3		155.1/174.5		175/175**		143/161		383/383	015
												NONE	—	—		28.7		35		30		176	—
												013	16.5	19.8		33.5		35		31		176	011
		STD									4.8	014	27.8	33.4		47.8		45		46		176	011
												015	33.0	39.7		58.3		60		54		176	011
151
												014 and 016	41.7	50.2		71.4		80**		66		176	014
	460-3-60		414	508	2	9	75	2	1/4	0.7		013 and 015	50.0	60.1		83.9		90**		77		176	014
												NONE	—	—		31.3		35		33		215	—
												013	16.5	19.8		36.8		40		34		215	011
		ALT									7.4	014	27.8	33.4		51.0		60		49		215	011
												015	33.0	39.7		61.6		70**		57		215	014
												014 and 016	41.7	50.2		74.7		80**		69		215	014
												013 and 015	50.0	60.1		87.1		90**		80		215	014
												NONE	—	—		23.3		30		25		129	—
		STD									4.8	018	17.0	17.1		28.3		30		26		129	011
												019	34.0	34.1		49.6		45		46		129	011
	575-3-60		518	632	2	7.4	54	2	1/4	0.7		018 and 019	51.0	51.2		71.0		80**		65		129	014
												NONE	—	—		25.4		30		27		160	—
		ALT									7.4	018	17.0	17.1		30.9		35		28		160	011
												019	34.0	34.1		52.2		50		48		160	011
												018 and 019	51.0	51.2		73.6		80**		68		160	014

		LEGEND
FLA	—	Full Load Amps
HACR	— Heating, Air Conditioning and Refrigeration
IFM	— Indoor (Evaporator) Fan Motor
LRA	—	Locked Rotor Amps
MCA	—	Minimum Circuit Amps
MOCP	—	Maximum Overcurrent Protection
NEC	—	National Electrical Code
OFM	— Outdoor (Condenser) Fan Motor
RLA	—	Rated Load Amps

*Used to determine minimum disconnect per NEC. †Fuse or HACR circuit breaker per NEC.

**Fuse only.

††Compressor no. 1 is shown in table.

208/230-3-60: Compressor no. 2 RLA is 14.1 amps and LRA is 105 amps.

460-3-60: Compressor no. 2 RLA is 7.1 amps and LRA is 55 amps.

575-3-60: Compressor no. 2 RLA is 6.4 amps and LRA is 40 amps.

NOTES:

1.In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit 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 of voltage imbalance.

% Voltage Imbalance

max voltage deviation from average voltage

= 100 x

average voltage

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

452 + 464 + 455

Average Voltage =

3

=1371

3

=457

Determine maximum deviation from average voltage. (AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v Maximum deviation is 7 v.

Determine percent of voltage imbalance.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

3.For units with power exhaust: If a single power source is to be used, size wire to include power exhaust MCA and MOCP. Check MCA and MOCP when power exhaust is powered through the unit (must be in accordance with NEC and/or local codes). Determine the new MCA including the power exhaust using the following formula:

MCA New = MCA unit only + MCA of Power Exhaust

For example, using a 558FPX091000 unit with MCA = 40.1 and MOCP = 45, with CRPWREXH030A01 power exhaust.

MCA New = 40.1 amps + 1.6 amps = 41.7 amps

If the new MCA does not exceed the published MOCP, then MOCP would not change. The MOCP in this example is 45 amps, the MCA New is below 45, therefore the MOCP is acceptable. If “MCA New” is larger than the published MOCP, raise the MOCP to the next larger size. For separate power, the MOCP for the power exhaust will be 15 amps per NEC.

POWER EXHAUST	MCA	MCA	MCA	MOCP
				(for separate
PART NO.	(230 v)	(460 v)	(575 v)
				power source)
CRPWREXH021A01	N/A	0.9	N/A	15
CRPWREXH022A01	3.3	N/A	1.32	15
CRPWREXH023A01	N/A	1.8	N/A	15
CRPWREXH028A01	1.7	N/A	0.68	15
CRPWREXH029A01	N/A	1.0	N/A	15
CRPWREXH030A01	1.6	N/A	0.64	15

4. Determine heater capacity using multiplication factors table below:

HEATER				ACTUAL HEATER VOLTAGE
RATING	200	208	230	240	380	440	460	480	550	575	600
VOLTAGE
240	0.694	0.751	0.918	1.000	—	—	—	—	—	—	—
480	—	—	—	—	0.626	0.840	0.918	1.000	—	—	—
600	—	—	—	—	—	—	—	—	0.840	0.918	1.000

NOTE: The following equation converts kW of heat energy to Btuh: kW x 3.412 = Btuh.

EXAMPLE: 32.0 kW (at 240 v) heater on 208 v

=32.0 (.751 mult factor)

=24.0 kW capacity at 208 v

% Voltage Imbalance = 100 x

7

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

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