Bryant 581B Ð Electrical Data Units with Electrical Convenience Outlet, Thermostat List

Table 3B Ð Electrical Data (Units with Electrical Convenience Outlet)

	NOMINAL	VOLTAGE						COMBUSTION	POWER SUPPLY		MINIMUM UNIT
UNIT				COMPRESSOR		OFM	IFM				DISCONNECT
	VOLTAGE	RANGE						FAN MOTOR	WITH OUTLET
581B												SIZE*
	(V-Ph-Hz)
		Min	Max	RLA	LRA	FLA	FLA	FLA	MCA	MOCP²	FLA		LRA
	208/230-1-60	187	254	16.0	88.0	0.7	4.9	.57	31.6/31.66	40/40	30/30		106/106
036	208/230-3-60	187	254	10.3	77.0	0.7	4.9	.57	24.5/24.5	30/30	24/24		95/ 95
(3 Tons)	460-3-60	414	508	5.1	39.0	0.4	2.2	.30	14.6	20	14		59
	575-3-60	518	632	4.2	31.0	0.4	2.2	.30	11.5	15	11		47
	208/230-1-60	187	254	23.7	129.0	0.7	4.9	.57	41.2/41.2	50/50	39/39		147/147
048	208/230-3-60	187	254	13.5	99.0	0.7	4.9	.57	28.5/28.5	35/35	28/28		117/117
(4 Tons)	460-3-60	414	508	7.4	49.5	0.4	2.2	.30	14.6	20	14		59
	575-3-60	518	632	5.8	40.0	0.4	2.2	.30	11.5	15	11		47
	208/230-1-60	187	254	28.8	169.0	1.5	8.8	.57	52.3/52.3	60/60	51/51		221/221
060	208/230-3-60	187	254	17.3	123.0	1.5	5.8	.57	34.9/34.9	40/40	34/34		173/173
(5 Tons)	460-3-60	414	508	9.0	62.0	0.8	2.6	.30	17.4	20	17		87
	575-3-60	518	632	7.1	50.0	0.8	2.6	.30	13.8	20	13		61
072	208/230-3-60	187	254	20.5	156.0	1.4	5.8	.57	38.8/38.8	45/45	35/35		205/205
	460-3-60	414	508	9.6	70.0	0.6	2.6	.30	17.9	20	17		95
(6 Tons)
	575-3-60	518	632	7.7	56.0	0.6	2.6	.30	14.4	20	14		75

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

*Used to determine minimum disconnect per NEC. ²Fuse or HACR circuit breaker.

max voltage deviation

%Voltage Imbalance = 100 x from average voltage 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 percentage of voltage imbalance:

% Voltage Imbalance = 100 x

7

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. The CUL 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- age of voltage imbalance.

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.

3. 575-v units are CUL approved only.

Control Voltage Connections

Install a factory-approved room thermostat. See Table 4. Lo- cate the thermostat on an inside wall in the space to be con- ditioned where it will not be subjected to either a cooling or heating source or direct exposure to sunlight. Mount the ther- mostat 4 to 5 ft above the ¯oor.

Route thermostat cable or equivalent single leads of colored wire from subbase terminals through connector on unit to low- voltage connections (shown in Fig. 14).

Connect thermostat wires to matching screw terminals of low- voltage connection board. See Fig. 14.

NOTE: For wire runs up to 50 ft, use no. 18 AWG insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insu- lated wire (35 C minimum). For 75 to 155 ft, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

Pass control wires through the hole provided in the corner post; then feed wires through the raceway built into the cor- ner post to the 24-v barrier located on the left side of the con- trol box. See Fig. 15. The raceway provides the UL required clearance between high- and low-voltage wiring.

Connect thermostat wires to pigtails of low-voltage circuit in low-voltage section on control box using wirenuts.

Table 4 Ð Thermostat List*

TYPE

Manual Changeover (Standard)

2 Heat/2 Cool

Auto. Changeover (Standard)

2 Heat/2 Cool

Manual Changeover (Electronic Setback)

2 Heat/2 Cool

Auto. Changeover (Electronic Setback)

2 Heat/2 Cool

*See Trade Prices for part numbers.

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