Bryant 548D installation instructions Physical Data

Table 1 — Physical Data

UNIT SIZE 548D		090		102	120
NOMINAL CAPACITY (tons)		71/2		81/2	10
OPERATING WEIGHT (lb)
Unit
Al/Al*		940		965	1015
Economizer
Durablade		44		44	44
EconoMi$er		62		62	62
Roof Curb†		143		143	143
COMPRESSOR				Hermetic Scroll
Quantity		2		2	2
Oil (oz)		45 ea		62 ea	54 ea
REFRIGERANT TYPE				R-22
Operating Charge (lb-oz)
Circuit 1		5-14		8- 6	7-14
Circuit 2		5-13		8-13	8- 3
OUTDOOR COIL		Enhanced Copper Tubes, Aluminum Lanced Fins, Acutrol™ Feed Device
Rows...Fins/in.		1...17		2...17	2...17
Total Face Area (sq ft)		20.50		18.00	18.30
OUTDOOR FAN				Propeller Type
Nominal Cfm		6500		6500	6500
Quantity...Diameter (in.)		2...22		2...22	2...22
Motor Hp...Rpm		1/4...1100		1/4...1100	1/4...1100
Watts Input (Total)		600		600	600
INDOOR COIL		Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol Fixed Orifice Metering Feed Device
Rows...Fins/in.		3...15		3...15	3...15
Total Face Area (sq ft)		8.0		8.0	11.1
INDOOR FAN				Centrifugal Type
Quantity...Size (in.)	Std	1...15 x 15		1...15 x 15	1...15 x 15
	Alt	1...15 x 15		—	1...15 x 15
Type Drive	Std	Belt		Belt	Belt
Nominal Cfm	Alt	Belt		—	Belt
		3000		3600	4000
Maximum Continuous Bhp	Std	2.40		2.40	2.40
	Alt	—		—	2.90
Motor Frame Size	Std	56		56	56
	Alt	—		—	56
Nominal Rpm High/Low	Std	—		—	—
	Alt	—		—	—
Fan Rpm Range	Std	590-840		685-935	685- 935
Motor Bearing Type	Alt	685-935		—	835-1085
		Ball		Ball	Ball
Maximum Allowable Rpm		2100		2100	2100
Motor Pulley Pitch Diameter Min/Max (in.)	Std	2.4/3.4		2.8/3.8	2.8/3.8
	Alt	2.8/3.8		—	3.4/4.4
Nominal Motor Shaft Diameter (in.)	Std	5/8		5/8	5/8
	Alt	—		—	7/8
Fan Pulley Pitch Diameter (in.)	Std	7.0		7.0	7.0
	Alt	7.0		—	7.0
Belt, Quantity...Type...Length (in.)	Std	1...A...48		1...A...48	1...A...48
	Alt	1...A...48		—	1...A...48
Pulley Center Line Distance (in.)	Std	16.75-19.25		16.75-19.25	15.85-17.50
Speed Change per Full Turn of	Alt	15.75-19.25		—	15.85-17.50
Movable Pulley Flange (rpm)	Std	50		50	50
Movable Pulley Maximum Full Turns	Alt	50		—	50
From Closed Position	Std	5		5	5
	Alt	5		—	5
Factory Setting	Std	5		5	5
	Alt	5		—	5
Factory Speed Setting (rpm)	Std	590		685	685
Fan Shaft Diameter at Pulley (in.)	Alt	685		—	835
		1		1	1
HIGH-PRESSURE SWITCH (psig)**
Standard Compressor Internal Relief (Differential)			450 ± 50
Cutout			428
Reset (Auto.)			320
LOSS-OF-CHARGE SWITCH (psig)**
Cutout			7 ± 3
Reset (Auto.)			22 ± 5
FREEZE-PROTECTION THERMOSTAT (F)**
Opens			30 ± 5
Closes			45 ± 5
OUTDOOR-AIR INLET SCREENS				Cleanable
Quantity...Size (in.)				1...20 x 25 x 1
				1...16 x 25 x 1
RETURN-AIR FILTERS				Throwaway
Quantity...Size (in.)		4...16 x 20 x 2		4...16 x 20 x 2	4...20 x 20 x 2

LEGEND

Al — Aluminum

Bhp — Brake Horsepower

*Indoor coil fin material/outdoor coil fin material. †Weight of 14-in. roof curb.

**Requires an accessory or optional controls upgrade kit.

NOTE: The 548D units have a loss-of-charge switch located in the liquid line avail- able as an option or an accessory. (Standard on 120 units.)

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