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Table 1 — Physical Data (cont)
UNIT SIZE 48
NLT
042
!
NMT
042
!
NET
I
042
NHT
042
NVT
042
'
NLT
048
NMT
048
i
NHT
048
1
NVT
1
048
NLT
060
NMT
060
NHT
060
1
NVT
i
060
NOMINAL CAPACITY (ton)
3Vz
4
5
OPERATING WEIGHT (lb)
496
1
500
(
500
(
550
|
556
574
1
580
i
586
|
586
604
1
610
1
616
I
616
COMPRESSORS
Quantity
Reciprocating Hermetic, 3500 Rpm
1
REFRIGERANT*
R-22
REFRIGERANT METERING
DEVICE
Accu Rater® Piston
CONDENSER COIL
Rows
FIns/in.
2
20
CONDENSER FAN
Nominal Airflow (Cfm)
Nominal Speed (Rpm)
Quantity...Dlameter (in.)
Motor Hp (single-phase)
(three-phase)
2500
I
Vz
I
I
3000
I
35
1100
1
20
1
%
1
3/4
00
1
1
EVAPORATOR COIL
Rows
Fins/In.
3
14
4
14
EVAPORATOR FAN
Nominal Cfm
Nominal Speed (Rpm)
Diameter x Width (In.)
Motor Hp (single-phase)
(three-phase)
Vz
I
Vz
\
1400
1
1
1600
1100
lOx 10
3/4
1
3/4
1
2000
1
3450
1
1
[
1
FURNACE SECTION
Burner Orifice No.
(Qty...drlll size) Natural Gas
Burner Orifice No.
(Qty...dri)l size) Propane Gas
.
Pilot Orifice Diameter
(In. ...drill size) Natural Gas
Pilot Orifice Diameter (in.)
Propane Gas
3 44
3 55
4. 44
4 55
4 42
!
4 54
5 44
5 55
6
44
6
. 55
3 44
3 .55
4 44
4 55
018 77
009
5 44
5 55
6
42
1
6
54
3 44
3 55
4 44
4 55
5 44
5 55
6
42
6
54
RETURN-AIR FILTERS (sq ln.)t
'
Disposable
Cieanable
720
480
816
544
960
640
'Operating charge is listed on unit namepiate
tRequired fieid-suppiied fiiter areas are based on the larger of the ARI-rated (Air Conditioning & Refrigeration institute) cooling airflow or the heating airflow at a velocity of 300 ft/min
for disposable type or 450 ft/min for high-capacity type. Air filter pressure drop must not exceed 0 08 in wg
Step 5 — Connect Condensate Drain
NOTE: When installing condensate drain connection be sure
to comply with local codes and restrictions.
The unit disposes of condensate water through a y4-in.
NPT drain fitting. See Fig. 2 and 3 for location.
Install a 2-in. trap at the drain fitting to ensure proper
drainage. See Fig. 5. Make sure the outlet of the trap is at
least one-in. lower than the unit drain pan connection to
prevent the pan from overflowing. Prime the trap with
water.
If the installation requires draining the condensate water
away from the unit, connect a drain tube using a minimum
of Vs-in. OD copper tubing, y4-in. galvanized pipe or y4-in.
plastic pipe. Do not undersize the tube. Pitch the drain tube
downward at a slope of at least one inch in every 10 ft of
horizontal run. Be sure to check the drain tube for leaks.
UNIT 48
CORNER WT (LB)
A
B
C
0
NLT018
99.
126
1^6
99
NLT024
100
127
127
100
NHT024
101
129
129
101
NLT030
103
132
132
103
NMT030
105
133
133
105
NHT030
106
134
134
106
NLT036
107
136
136
107
NMT036
108
137
137
108
NET036
108
137
137
108
NHT036
117
147
148
118
NVT036
119
148
149
120
NLT042
109
139
139
109
NMT042
110
140
140
110
NET042
110
140
140
110
NHT042
117
147
147
117
NVT042
124
153
154
125
NLT048
128
158
159
129
NMT048
130
159
160
131
NHT048
131
161
162
132
NVT048
131
161
162
132
NLT060
136
165
166
137
NMT060
138
166
167
139
NHT060
139
168
169
140
NVT060
139
168
169
140
Fig. 4 - Suggested Rigging
5
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