Carrier Complete Guide for 48TJF024 Gas Heater - Installation, Maintenance, and Specifications

INDUCED DRAFT

MOTOR

COMBUSTION MAIN BURNER HEAT EXCHANGER

FAN HOUSING SECTIONSECTION

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

____. (FIELD-SUPPLIED)NIPPLE

(HALF CO_--

3"

BASE RAIL _@_

81/2-1N.(FIELD ....

SUPPLIED) NIPPLE

Fig. 12- Condensate Drain Piping Details

Step 7 -- Orifice Change -- This unit is factory as-

sembled for 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	NATURAL	GAS ORIFICE]-
	(ft)	High Heat
	Low 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.

1-Orifices available through your Carrier dealer.

Table 3 -- Orifice Quantity

UNIT ORIFICE QUANTITY

48TJD0165

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)	LP GAS ORIFICE]"
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
0,000	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.

1-Orifices available through your Carrier dealer.

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