OPTIONAL UNIONS
TO ALLOW FOR CONDENSATE --.._
PAN REMOVAL _
CONDENSATE
PAN ACCESS
PANEL
Fig. 8 - External Trap for Condensate Drain
/
C06234
MINIMUM PITCH
ONE IN. PER BASE
10 FT OF LiNE \ RAiL
\
\ OPEN
VENT __
TO ROOF I I _ _
DRAIN -- -
_=_ DRAIN PLUG
SEE
NOTE
_..ROOF
I CURB
NOTE: Trap should be deep enough to offset maximum unit static difference.
A 4-in. trap is recommended.
Fig. 9 - Condensate Drain Piping Details
C06291
Step 7 -- Orifice Change
This unit is factory assembled for heating operation using natural
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 It)
Consult the local gas utility company to deternfine if gas supply
has been de-rated for high altitude. If gas supply is not de-rated,
use accessory high altitude kit when installing this unit at an
elevation of 2000 to 7000 ft. For elevations above 7000 ft, refer to
Table 6 to identify the correct orifice size for the elevation. See
Table 7 for the number of orifices required for each unit size.
Purchase these orifices from your local Carrier dealer. Follow
instructions in accessory Installation Instructions to install the
correct orifices.
Table 5 - Altitude Compensation*
ELEVATION (ft) NATURAL GAS ORIFICEt
O- 1,999 45
2,000 47
3,000 47
4,000 47
5,000 48
6,000 48
7,000 48
8,000 49
9,000 49
10,000 50
11,000 51
12,000 51
13,000 52
14,000 52
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 6 - Orifice Quantity
UNIT 3 4 5 6 7
Low Heat (D/L) -- 3 3 4 4
Medium Heat (E/M) -- 4 4 6 6
High Heat (F/N) 3 6 6 8 8
11
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