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INDUCED DRAFT
MOTOR
COMBUSTION MAIN BURNER HEAT EXCHANGER
FAN HOUSING SECTION SECTION
Fig. 10- Combustion Fan Housing Location
3/4" FPT DRAIN 1-3/8"
CONNECTION DRAIN HOLE
Fig. 11 -- Condensate Drain Details
(48TJ016 Shown)
3/4 -IN. FPT
DRAIN CONNECTION
(HALF CO_--
BASE RAIL _@_
____. (FIELD-SUPPLIED)NIPPLE
3"
8 1/2-1N. (FIELD ....
SUPPLIED) NIPPLE
Fig. 12- Condensate Drain Piping Details
Step 7 -- Orifice Change -- This unit is factory as-
sembledfor heating operation using natund gas at an elevation
from sea level to 2000 ft. This 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 accessory high
altitude kit when inst_dling this unit at an elewttion of 2000 to
7000 ft. For elevations above 7000 ft, refer to Table 2 to identi-
fy the correct orifice size for the elevation. See Table 3 for the
number of orifices requiled for each unit size. Purchase these
orifices from your local Carrier dealel: Follow instructions in
accessory Installation Instructions to install the correct orifices.
Table 2 -- Altitude Compensation*
ELEVATION (ft)
0-1,999
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
NATURAL GAS ORIFICE]-
Low Heat High Heat
30 29
30 29
31 30
31 30
31 30
31 30
32 31
32 31
33 31
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.
1-Orifices available through your Carrier dealer.
Table 3 -- Orifice Quantity
UNIT ORIFICE QUANTITY
48TJD016 5
48TJD020,
48TJD024, 6
48TJD028,
48TJF016
48TJF020,
48TJF024, 7
48TJF028
CONVERSION TO LP (Liquid Propane) GAS -- Use acces-
sory LP gas conversion kit when converting this unit for use
with 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 the elewttion. See Table 3 for the number of orifices
required for each unit size. Purchase these orifices from your
loc_fl Carrier dealel: Follow instructions in accessory Installa-
tion Instructions to inst_dl the correct orifices.
Table 4 -- LP Gas Conversion*
ELEVATION (ft)
0-1,999
2,000
3,000
4,000
5,000
6,000
7,000
8,000
0,000
10,000
LP GAS ORIFICE]"
36
37
38
38
39
40
41
41
42
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.
1-Orifices available through your Carrier dealer.
10