31
Table 12 – Altitude Compensation
}
(48LCL/M/N*04--06) -- Low NO
x
Units
ELEVATION
ft (m)
60,000, 90,000
BTUH Nominal
120,000
BTUH Nominal
NG Orifice Size
NG Orifice Size
0 --- 2000 (610)
38
2
32
1
2000 (610)
39
2
33
1
3000 (914)
†40
33
1
4000 (1219)
†41
35
1
5000 (1524)
†41
35
1
6000 (1829)
†42
36
1
7000 (2134)
†42
36
1
8000 (2438)
†43
37
2
9000 (2743)
†43
38
2
10000 (3048)
44
2
†40
11000 (3353)
44
2
†41
12000 (3658)
45
2
†42
13000 (3962)
47
3
†43
14000 (4267)
48
3
†43
LEGEND
NG = Natural Gas
}
As the height above sea level increases, there is less oxy-
gen per cubic ft. of air. Therefore, heat input rate should
be reduced at higher altitudes.
{
Not included in kit. May be purchased separately through
dealer.
1 = CRLPELEV001A00
2 = CRLPELEV002A00
3 = CRLPELEV003A00
Minimum heating entering air temperature
When operating on first stage heating, the minimum
temperature of air entering the dimpled heat exchanger is
50
_
F continuous and 45
_
F intermittent for standard heat
exchangers and 40
_
F continuous and 35
_
F intermittent for
stainless steel heat exchangers. To operate at lower
mixed--air temperatures, a field--supplied outdoor--air
thermostat must be used to initiate both stages of heat
when the temperature is below the minimum required
temperature to ensure full fire operation. Wire the
outdoor--air thermostat OALT (part no. HH22AG106) in
series with the second stage gas valve. See Fig. 41. Set the
outdoor--air thermostat at 35
_
F for stainless steel heat
exchangers or 45
_
F for standard heat exchangers. This
temperature setting will bring on the second stage of heat
whenever the ambient temperature is below the thermostat
setpoint. Indoor comfort may be compromised when
heating is initiated using low entering air temperatures
with insufficient heating temperature rise.
CTB
W2
Thermostat
TH1
TH2
W1
W1
W2
OALT
C14041
Fig. 41 -- OATL Connections
Troubleshooting Heating System
Refer to Table 13 and Table 14 for additional
troubleshooting topics.
48L
C
Summary of Contents for 48LC 05
Page 10: ...10 COOLING CHARGING CHARTS C14037 Fig 13 Cooling Charging Charts 3 Ton 48LC ...
Page 11: ...11 COOLING CHARGING CHARTS cont C14038 Fig 14 Cooling Charging Charts 4 Ton 48LC ...
Page 12: ...12 COOLING CHARGING CHARTS cont C14039 Fig 15 Cooling Charging Charts 5 Ton 48LC ...
Page 35: ...35 WIRING DIAGRAMS C14043 Fig 44 Unit Wiring Diagram Power 208 230V 460V 3 Phase 48LC ...
Page 36: ...36 C14044 Fig 45 Unit Wiring Diagram Power 575V 3 Phase 48LC ...
Page 37: ...37 C14045 Fig 46 Unit Wiring Diagram Control 48LC ...
Page 47: ...47 48LC ...