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SPECIFICATIONS — 538A AND 538C CONDENSING UNITS
UNIT 538C 009 538C 012 538A 018 538A 024
NOMINAL CAPACITY (Tons)
3
⁄
4
11
1
⁄
2
2
OPERATING WEIGHT (lb) 55.0 62.0 150 154
REFRIGERANT TYPE R-22
Control (Cooling) Capillary AccuRaterா Piston at Fan Coil Unit
Factory Charge (lb)* 1.5 1.5 4.6 5.3
COMPRESSOR TYPE
Carlyle Rotary
Tecumseh
Reciprocating
Copeland
Scroll
Model EAA090111A EBB120111A AW5517G ZR23K1
OUTDOOR FAN Propeller Type
Rpm 1050 1050 850 850
Nominal Air Cfm (High Speed) — — 1720 1720
OUTDOOR COIL Copper Tube, Aluminum Fin
Face Area (sq ft)...No. of Rows 3.5...1 3.5...2 6.1...1.5 6.1...2
Fins/in. 18 18 15 15
CONTROLS
High-Pressure (psig)
Cutout — — 426 ± 7
Cut-in — — 320±20
Low-Pressure (psig)
Cutout —— 7±3
Cut-in —— 22±5
Fusible Plug 210 F 210 F 210 F
Control Voltage† 115 230 24
REFRIGERANT LINES
Connection Type Flare Sweat
Liquid Line OD (in.)
1
⁄
4
1
⁄
4
3
⁄
8
3
⁄
8
Vapor Line OD (in.)
1
⁄
2
1
⁄
2
5
⁄
8
5
⁄
8
Maximum Length (ft) 35 35 200 200
Maximum Lift (Fan Coil Above Outdoor) (ft) 16 16 65 65
Maximum Lift (Fan Coil Below Outdoor) (ft) 30 30 150 150
EXTERNAL FINISH Grey Alpine Mist (Beige)
*See System Piston Guide and Refrigerant Charges tables in Application section on page 21 for proper
charge and piston with each fan coil type. Charge is based on duct-free fan coil requiring smallest
amount of refrigerant and 25 ft of interconnecting line.
†24 v and a minimum of 40 va is provided in the fan coil unit.
6