Product data

SPECIFICATIONS — 538A CONDENSING UNITS (cont)
UNIT 538A 048 060
NOMINAL CAPACITY (Tons) 45
OPERATING WEIGHT (lb) 270 290
REFRIGERANT TYPE R-22
Control (Cooling) AccuRaterT Piston at Fan Coil Unit
Factory Charge (lb)* 7.4 13.6
COMPRESSOR
Type Copeland Scroll Carrier Scroll
Model ZR49K3 SY60AC
Oil (Recharge) (oz) 53 52
Accumulator Yes
OUTDOOR FAN Propeller, Direct Drive
Rpm 850 850
Diameter (in.)...No. of Blades 24...3 24...3
Pitch (Degrees) 24 24
Motor Hp
1
⁄ 4
1
⁄ 4
Nominal Air Cfm 3900 3900
OUTDOOR COIL Copper Tube, Aluminum Fin
Face Area (sq ft)...No. of Rows 12.3...2 12.3...3
Fins/in. 15 15
CONTROLS
Cut-in 320±20
Cutout 426 ± 7
Low-Pressure (psig)
Cut-in 22 ± 5
Cutout 7± 3
Fusible Plug 210 F
Control Voltage† 24
REFRIGERANT LINES
Connection Type Sweat
Liquid Line OD (in.)
3
⁄ 8
3
⁄ 8
Vapor Line OD (in.)
7
⁄ 8 1
1
⁄ 8 **
Maximum Length (ft) 200 200
Maximum Lift Fan Coil (Above Outdoor) (ft) 65 65
Maximum Lift Fan Coil (Below Outdoor) (ft) 150 150
EXTERNAL FINISH Alpine Mist (Beige)
*See System Piston Guide and Refrigerant Charges table in Application Data section on page 41 for
proper charge with each fan coil type.
†24 v and a minimum of 40 va is provided in the fan coil unit.
**Valve connection size is
7
⁄ 8 inch. Recommended line size is 1
1
⁄ 8 inch.
8