6
Table 1 — Physical Data
LEGEND
*Evaporator coil fin material/condenser coil fin material. Contact your local representative
for details about coated fins.
†Weight of 14-in. roof curb.
NOTES:
1. The 50TFF units have a loss-of-charge switch located in the liquid line.
2. High-static motor not available on size 014 units.
UNIT SIZE 50TFF 008 009 012 014
NOMINAL CAPACITY (tons)
7
1
/
2
8
1
/
2
10 12
1
/
2
OPERATING WEIGHT (lb)
Unit
Al/Al*
755 760 915 930
Al/Cu*
766 776 937 957
Cu/Cu*
778 787 960 980
Durablade Economizer
44 44 44 44
EconoMi$er
62 62 62 62
Roof Curb†
143 143 143 143
COMPRESSOR
Reciprocating Reciprocating Reciprocating Scroll
Quantity
2222
No. Cylinders (per circuit)
2222
Oil (oz)
42 ea 65 ea 54 ea 54 ea
REFRIGERANT TYPE
R-22
Operating Charge (lb-oz)
Circuit 1
4-13 6-14 7- 3 8-10
Circuit 2
4-14 9- 2 7-13 8- 6
CONDENSER COIL
Enhanced Copper Tubes, Aluminum Lanced Fins
Rows...Fins/in.
1...17 2...17 2...17 2...17
Total Face Area (sq ft)
20.50 18.00 20.47 25.00
CONDENSER FAN
Propeller Type
Nominal Cfm
6400 6400 7000 7000
Quantity...Diameter (in.)
2...22 2...22 2...22 2...22
Motor Hp...Rpm
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
Watts Input (Total)
600 600 600 600
EVAPORATOR COIL
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Metering Device
Rows...Fins/in.
3...15 3...15 3...15 4...15
Total Face Area (sq ft)
8.0 8.0 10.0 11.1
EVAPORATOR FAN
Centrifugal Type
Quantity...Size (in.) Std
1...15 x 15 1...15 x 15 1...15 x 15 1...15 x 15
Alt
1...15 x 15 — 1...15 x 15 1...15 x 15
High-Static
1...15 x 15 1...15 x 15 1...15 x 15 —
Type Drive Std
Belt Belt Belt Belt
Alt
Belt — Belt Belt
High-Static
Belt Belt Belt —
Nominal Cfm
3000 3100 4000 5000
Maximum Continuous Bhp Std
2.40 2.40 2.40 3.70
Alt
2.40 — 2.90 5.25
High-Static
3.70 3.70 5.25 —
Motor Frame Size Std
56 56 56 56
Alt
56 — 56 56
High-Static
56 56 56 —
Nominal Rpm High/Low Std
————
Alt
————
High-Static
1725 1725 1725 1725
Fan Rpm Range Std
590- 840 685- 935 685- 935 860-1080
Alt
685- 935 — 835-1085 900-1260
High-Static
860-1080 860-1080 830-1130 —
Motor Bearing Type
Ball Ball Ball Ball
Maximum Allowable Rpm
2100 2100 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Std
2.4/3.4 2.8/3.8 2.8/3.8 4.0/5.0
Alt
2.8/3.8 — 3.4/4.4 3.1/4.1
High-Static
4.0/5.0 4.0/5.0 2.8/3.8 —
Nominal Motor Shaft Diameter (in.) Std
5
/
8
5
/
8
5
/
8
7
/
8
Alt
5
/
8
—
7
/
8
7
/
8
High-Static
7
/
8
7
/
8
7
/
8
—
Fan Pulley Pitch Diameter (in.) Std
7.0 7.0 7.0 8.0
Alt
7.0 — 7.0 5.9
High-Static
8.0 8.0 5.8 —
Belt, Quantity...Type...Length (in.) Std
1...A...49 1...A...49 1...A...49 1...A...52
Alt
1...A...49 — 1...A...49 1...BX...46
High-Static
1...A...55 1...A...55 1...BX...46 —
Pulley Center Line Distance (in.) Std
16.75-19.25 16.75-19.25 15.85-17.50 15.85-17.50
Alt
15.75-19.25 — 15.85-17.50 15.85-17.50
High-Static
15.75-19.25 16.75-19.25 15.85-17.50 —
Speed Change per Full Turn of
Movable Pulley Flange (rpm) Std
50 50 50 44
Alt
50 — 50 50
High-Static
60 60 60 —
Movable Pulley Maximum Full Turns
From Closed Position Std
5555
Alt
5—5 6
High-Static
556—
Factory Setting Std
5555
Alt
5—5 5
High-Static
555—
Factory Speed Setting (rpm) Std
590 685 685 860
Alt
685 — 835 960
High-Static
860 860 887 —
Fan Shaft Diameter at Pulley (in.)
1111
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential)
450 ± 50 500
±
50
Cutout
428 428
Reset (Auto.)
320 320
LOW-PRESSURE SWITCH (psig)
Cutout
7 ± 3
Reset (Auto.)
22 ± 7
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 4...20 x 20 x 2
Al —
Aluminum
Bhp —
Brake Horsepower
Cu —
Copper
To Next Page
Loading...
