6
Table 1 – Physical Data
UNIT 48PM
20
24
28
NOMINAL CAPACITY (TONS)
18
20
25
VOLTAGE (volts)
208/230 / 460 / 575
208/230 / 460 / 575
208/230 / 460 / 575
OPERATING WEIGHT (lbs)
Unit*
2329
2344
2494
Humidi--MiZer
™
System
80
80
100
Economizer
170
170
195
Roof Curb 14--in
…
24--in
305
…
385
305
…
385
270
…
345
REFRIGERANT SYSTEM
Refrigerant
…
Metering Device
Puron (410a)
…
Balanced--Port TXV with Bypass
# Circuits
…
# Comp.
2
…
2
2
…
2
2
…
2
STD Unit Charge A
…
B (lbs)
13.7
…
12.0
15.0
…
15.0
16.7
…
16.7
Humidi--MiZer
™
Unit Charge A
…
B (lbs)
22.6
…
20.9
22.6
…
22.6
27.1
…
27.1
COMPRESSOR
Scroll
Oil Type
Copeland 3MA
Oil A
…
B
…
C (oz)
110
…
60
110
…
110
110
…
110
HIGH- PRESSURE SWITCH (psig)
Cutout
…
Reset (Auto.)
630+/--10
…
505+/--20
630+/--10
…
505+/--20
630+/--10
…
505+/--20
CONDENSER COIL
Microchannel
Circuit A
…
B
Outer
…
Inner
Outer
…
Inner
Outer
…
Inner
Rows
…
Fins/in.
1
…
20
1
…
20
1
…
20
Face Area (sq ft)
52.6
57
65.5
CONDENSER FAN (type)
Propeller
Quantity
…
Diameter (in.)
4
…
22
6
…
22
6
…
22
Nominal CFM (Total, all fans)
14400
21000
21000
Motor Hp ... Watts
0.25
…
1400
0.25
…
2100
0.25
…
2100
Nominal RPM
1100
1100
1100
EVAPORATOR COIL
Round Tube Plate Fin
Circuit A
…
B
Bottom...Top
Bottom...Top
Bottom...Top
Rows
…
Fins/in.
4..15
4..15
4..15
Face Area (sq ft)
23.1
23.1
28.9
Condensate drain conn. Size (in.)
3/4 NPT
3/4 NPT
3/4 NPT
Humidi- MiZer
™
COIL
Round Tube Plate Fin
Circuit A
…
B
Bottom...Top
Bottom...Top
Bottom...Top
Rows
…
Fins/in.
2
…
15
2
…
15
2
…
15
Face Area (sq ft)
12.4
12.4
17.1
EVAPORATOR FAN (see motor & drive tables for more)
Fan Quantity
…
Size (in.)
2
…
15x11
2
…
15x11
2
…
15x11
Type Drive
Belt
Belt
Belt
Nominal CFM
7200
8000
10000
Fan Bearing Type
Ball -- Concentric Lock
Maximum Fan RPM
1400
1400
1400
Blower Shaft Diameter (in.)
1.1875
1.1875
1.1875
Blower Pulley Type
Fixed
Fixed
Fixed
FILTERS
RA Filter # ... size (in)
9
…
16x25
9
…
16x25
9
…
20x25
Economizer OA inlet screen # ... size (in)
3
…
20x25
3
…
20x25
3
…
20x25
GAS HEAT SECTION
Manifold Pressure (in. wg.)
Natural Gas Vertical
…
Horizontal
3.00
…
2.95
3.00
…
2.95
3.00
…
2.95
Liquid Propane Vertical
…
Horizontal
3.00
…
2.8
3.00
…
2.8
3.00
…
2.8
Thermostat Heat Anticipator Setting (amps)
First Stage
…
Second Stage
0.98
…
0.44
0.98
…
0.44
0.98
…
0.44
Field Gas Connection Size (in.)
3/4
3/4
3/4
Gas Supply Pressure Range (in. wg.)
5.5 -- 13.0
5.5 -- 13.0
5.5 -- 13.0
Gas Supply Pressure Range (PSIG)
0.235 -- 0.469
0.235 -- 0.469
0.235 -- 0.469
LO
W
HE
A
T
# of burners (total)
5
5
5
Rollout switch opens ... closes (deg F)
225
…
175
225
…
175
225
…
175
Temperature Rise Min -- Max (deg F)
15 -- 45
15 -- 45
15 -- 45
Natural Gas
Input (Btuh) Stage1...Stage 2
199,000
…
250,000
199,000
…
250,000
199,000
…
250,000
Burner Orifice Diameter (in. ...drill size)**
0.136
…
29
0.136
…
29
0.136
…
29
Liquid Propane
Input*** (Btuh) Stage1...Stage 2
207,000
…
250,000
207,000
…
250,000
207,000
…
250,000
Burner Orifice Diameter (in. ...drill size)**
0.110
…
35
0.110
…
35
0.110
…
35
M
EDI
UM
HE
AT
# of burners (total)
8
8
8
Rollout switch opens ... closes (deg F)
225
…
175
225
…
175
225
…
175
Temperature Rise Min -- Max (deg F)
25 -- 55
25 -- 55
25 -- 55
Natural Gas
Input (Btuh) Stage1...Stage 2
281,000
…
365,000
281,000
…
365,000
281,000
…
365,000
Burner Orifice Diameter (in. ...drill size)**
0.1285
…
30
0.1285
…
30
0.1285
…
30
Liquid Propane
Input*** (Btuh) Stage1...Stage 2
291,000
…
365,000
291,000
…
365,000
291,000
…
365,000
Burner Orifice Diameter (in. ...drill size)**
0.1015
…
38
0.1015
…
38
0.1015
…
38
HI
G
H
HE
AT
# of burners (total)
8
8
8
Rollout switch opens ... closes (deg F)
225
…
175
225
…
175
225
…
175
Temperature Rise Min -- Max (deg F)
25 -- 55
25 -- 55
25 -- 55
Natural Gas
Input (Btuh) Stage1...Stage 2
317,000
…
400,000
317,000
…
400,000
317,000
…
400,000
Burner Orifice Diameter (in. ...drill size)**
0.136
…
29
0.136
…
29
0.136
…
29
Liquid Propane
Input*** (Btuh) Stage1...Stage 2
331,000
…
400,000
331,000
…
400,000
331,000
…
400,000
Burner Orifice Diameter (in. ...drill size)**
0.110
…
35
0.110
…
35
0.110
…
35
* Aluminum evaporator coil/aluminum condenser coil with low heat
** For applications less than 2000 ft elevation
*** Vertical application numbers shown. For horizontal, see product data
book
48PM20
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