Carrier 39L handleiding
Handleiding
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Table 22 — Field Wiring for Incoming Conductors
Sized for 125% of Heater Load
LEGEND
Discharge Modification
If field modification of discharge position is required, 39L fans
can be converted (by a skilled mechanic) to any standard hand and
discharge without any additional parts.
NOTE: This does not apply to a model change conversion.
All mounting holes are prepunched.
To convert a 39L fan, note the following:
1. Sizes 03-18 — See Fig. 61. It is not necessary to remove the
bearing support channels from the fan housing.
2. Sizes 21 and 25 — See Fig. 62. The “A” frame support must
be removed. To change from upblast to horizontal discharge
or from horizontal to upblast discharge, the bearings must be
relocated to keep the wheel centered in the housing. To
change from upblast front (UBF) to upblast rear (UBR) or
from top horizontal front (THF) to top horizontal rear (THR)
or vice versa, turn the entire fan housing 180 degrees about its
base.
3. The fan shaft may be driven out and reinstalled to place the
drive pulley on the opposite end.
4. The fan scroll is prepunched for horizontal or vertical dis-
charge to match the support angles at the base of the unit.
5. The motor and motor base may be rotated to place the motor
at the front or rear of the unit. Proper location is that which
results in the longest drive center line distance. The motor
conduit box location may need to be reversed.
6. When hand of fan is changed, it may be necessary to turn the
discharge panel inside-out to fit correctly with the fan dis
-
charge. In this case, remove the existing insulation and install
new duct-liner type insulation on the opposite side of the dis
-
charge panel.
7. Rebalancing of the unit is recommended.
Fig. 61 — Fan Discharge Positions, Sizes 03-18
WIRE SIZE
(AWG or kcmil)
LOAD AMPS
a
NOTE(S):
a. Values are based on Table 310-16 of the NEC (National Electrical Code) for
75°C insulated copper wire. Not more than 3 conductors in a raceway.
b. Be sure to consider length of wiring run and possible voltage drops when sizing
wires.
c. Field power wiring — Heaters are furnished with a terminal block sized for in-
coming copper conductors with 75°C insulation rated to carry at least 125% of
the heater load. However, conductors can be sized to carry 100% of the heater
load if the heater is rated at 50 kW or more, and the heater is controlled by a
cycling device such as a multi-stage thermostat, step controller, or SCR (silicon
control rectifier) power controller. Terminal blocks and knockouts are sized to
handle either 100% or 125% conductors.
WIRE SIZE
(AWG or kcmil)
LOAD AMPS
a
Copper Copper
12 16 1/0 120
10 24 2/0 140
8 40 3/0 160
6 52 4/0 184
4 68 250 204
3 80 300 228
2 92 350 248
1 104 400 268
500 304
AWG — American Wire Gage
kcmil — Thousand Circular Mils
LEGEND
THF — Top Horizontal Front
THR — Top Horizontal Rear
UBF — Upblast Front
UBR — Upblast Rear
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Productinformatie
| Merk | Carrier |
| Model | 39L |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 14640 MB |
