Step 7 — orifice change, Table 3 — orifice quantity, Fig. 12 — condensate drain piping details – Carrier 48TJ016-028 User Manual
Page 10
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INDUCED
DRAFT
MOTOR
COMBUSTION MAIN BURNER HEAT EXCHANGER
FAN HOUSING SECTION
SECTION
Pig -|o — Combustion Fan Housing Location
Fig. 11 — Condensate Drain Details
(48TJ016 Shown)
Step 7 — Orifice Change
— This unit is factoiy as
sembled for heating operation using natural gas at an elevation
from sea level to 2000 ft. Tliis unit uses orifice type
LH32RFnnn, where “nnn” indicates the orifice size based on
drill size diameter in thousands of an inch.
HIGH ELEVATION (Above 2000 ft) — Use accessoiy high
altitude kit when installing tliis unit at an elevation of 2000 to
7000 ft. For elevations above 7000 ft, refer to Table 2 to identi
fy the correct orifice size for fhe elevafion. See Table 3 for the
number of orifices required for each unit size. Purchase these
orifices from your local Carrier dealer. Follow instmctions in
accessoiy Installation Instmctions to install the correct orifices.
Table 2 — Altitude Compensation*
ELEVATION (ft)
NATURAL GAS ORIFICEf
Low Heat
High Heat
0-1,999
30
29
2,000
30
29
3,000
31
30
4,000
31
30
5,000
31
30
6,000
31
30
7,000
32
31
8,000
32
31
9,000
33
31
10,000
35
32
*As the height above sea level Increases, there is less oxygen per
cubic foot of air. Therefore, heat input rate should be reduced at
higher altitudes. Includes a 4% input reduction per each 1000 ft.
fOrifices available through your Carrier dealer.
Table 3 — Orifice Quantity
UNIT
ORIFICE QUANTITY
48TJD016
5
48TJD020,
48TJD024,
48TJD028,
48TJF016
48TJF020,
48TJF024,
48TJF028
7
CONVERSION TO LP (Liquid Propane) GAS -- Use acces
soiy LP gas conversion kit when converting this unit for use
witli LP fuel usage for elevations up to 7000 ft. For elevations
above 7000 ft, refer to Table 4 to identify the correct orifice
size for tlie elevation. See Table 3 for the number of orifices
required for each unit size. Purchase these orifices from your
loctil Carrier dealer. Follow instmctions in accessoiy Installa
tion Instmctions to install the correct orifices.
Table 4 — LP Gas Conversion*
ELEVATION (ft)
LP GAS ORIFICEf
0-1,999
36
2,000
37
3,000
38
4,000
38
5,000
39
6,000
40
7,000
41
8,000
41
9,000
42
10,000
43
*As the height above sea level increases, there is less oxygen per
cubic foot of air. Therefore, heat input rate should be reduced at
higher altitudes. Includes a 4% input reduction per each 1000 ft.
fOrifices available through your Carrier dealer.
Fig. 12 — Condensate Drain Piping Details
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