Carrier 26H - Manual (Page 13)

Carrier INSTALLATION 26H
m
13. MAKE ELECTRICAL CONNECTIONS
Obtain a voltmeter or the special portable line vol­
tage tester recommended in the Carrier Product
Information Book. For satisfactory results, the vol­
tage when the unit is running must always remain
within 10 percent of the rated nameplate voltage.
Check the current supply at the customer's prem­
ises and resolve any wiring problems before pro­
ceeding with the installation. See Table 4 for nec­
essary electrical data.
208V APPLICATION "BUCK AND BOOST"
TRANSFORMER
For application on 208 volt circuits, a transformer
is recommended to boost the voltage from 208 volts
to 230 volts. The information in Table 5 should be
helpful in selecting the transformers. It is selected
on the basis of making a 10% voltage boost from
205 volts to 225 volts.
TABLE 4
MODEL VOLTAGE
FULL LOAD
CURRENT
FUSETRON
SIZE
WIRE SIZE (AWG) TYPE R,T
LENGTH OF RUN
25' 50' 100' 200'
26H3 115 10.8 15 14 12 10 6
26 H5 115 13.4 17 1/2 12 12 8 6
26H5 230 6.7 9 14 14 14 12
TABLE 5 - 208V APPLICATION
Carrier
Part No.
General
Electric
Part No.
Total
Amps
Allowable
HT04AH026 9T51Y6171 12.5 amps. Two units without crushers or one unit with
crusher plus one without crusher.
Will NOT handle two units with crushers.
HT04AH035 9T91Y6172 25 amps. Four units without crushers or two units with
crushers plus two units without crushers.
Will NOT handle four units with crusher.
Not stocked
at Carrier 37.5 amps. Six units without crushers or three units with
crushers plus three units without crushers
The wiring connections for this transformer for a 10% voltage boost are as follows:
m
-INPUT-
-OUTPUT-
-—I 2
FIG. n - "BUCK AMD BOOST" TRANSFORMER WIRING
13 26H 57PD