SECTION 16: E
LECTRICAL
41
16.1 Disconnect Fuse Sizin
g
The f
u
se classification m
u
st be determined by the ser
v
ice disconnect rating plate and all applicable codes.
F
u
se sizing is determined by the motor size, control c
u
rrent and s
u
pply
v
oltage. F
u
ses that are being
replaced m
u
st be replaced
w
ith the same type, size and class of f
u
se that
w
as s
u
pplied
w
ith the air handler.
For additional information or to confirm original f
u
se specifications, cons
u
lt the factory.
Table
8
: Minimum and Maximum Fuse Size by Motor Size and Supply Volta
g
e
16.2 Wirin
g
and Electrical Connections
All electrical
w
iring and connections, incl
u
ding
electrical gro
u
nding, m
u
st comply
w
ith:
United States: Refer to National Electrical Code
®
,
NFPA 70 - latest re
v
ision. Wiring m
u
st conform to the
most c
u
rrent National Electrical Code
®
, local
ordinances, and any special diagrams f
u
rnished.
Canada: Refer to Canadian Electrical Code, CSA
C22.1 Part 1 - latest re
v
ision.
Check rating plate on air handler for s
u
pply
v
oltage
and c
u
rrent req
u
irements.
If any of the original control
w
ire s
u
pplied
w
ith the air
handler m
u
st be replaced, replace it
w
ith type MTW
105°C, 600 V, 16 ga
u
ge
w
ire or eq
u
i
v
alent, except for
temperat
u
re control
w
iring,
w
hich m
u
st be a minim
u
m
of 20 AWG Type Beldon 5401FE CMR 75C shielded
or eq
u
i
v
alent.
For all other
w
ires, replace
w
ith the eq
u
i
v
alent size
and type of
w
ire that
w
as originally pro
v
ided
w
ith the
air handler.
16.3 Remote Panel
The remote panel m
u
st be
w
ired as sho
w
n on the
electrical schematic. For
w
ire ga
u
ge sizes,
w
er s
u
pply and motor
w
iring m
u
st
be minim
u
m type THWN
w
ith a 167° F (75° C)
temperat
u
re rise.
16.3.1 Remote Panel Mountin
g
Distance
If the interconnection
w
iring bet
w
een the remote
panel and the air handler control enclos
u
re is r
u
n in a
single cond
u
it, the
w
ire r
u
n can be as long as 100'
(30 m). For longer
w
ire r
u
ns, cons
u
lt the factory. If the
interconnection
w
iring bet
w
een the remote panel and
the air handler control enclos
u
re is r
u
n in t
w
o
cond
u
its (separating the shielded cable and the 120
V po
w
er s
u
pply for the remote panel), the
w
ire r
u
n
can be as long as 200' (60 m). For longer
w
ire r
u
ns,
cons
u
lt the factory. Care sho
u
ld be
u
sed to a
v
oid
r
u
nning the interconnect
w
iring near large ind
u
strial
loads or high
v
oltage
w
ire r
u
ns as that may f
u
rther
limit the length of the interconnect
w
ire r
u
n.
Table 9: Control Volta
g
e Wirin
g
For All Control
Systems
NOTE:
Wiring for temperat
u
re controls m
u
st be r
u
n in
shielded cable as indicated on the
w
iring diagram.
16.3.2 Low Volta
g
e Control Wirin
g
Lo
w
v
oltage (24 V - AC/DC) control
w
iring in excess
of 100' (30.5 m) in length sho
u
ld be in its o
w
n
separate cond
u
it r
u
n to pre
v
ent interference.
16.4 Motor Current Draw
For specific c
u
rrent req
u
irements, see rating plate
located on the blo
w
er motor. C
u
rrent dra
w
may be
adj
u
sted do
w
n
w
ard by red
u
cing blo
w
er rotations per
min
u
te (RPM) or by increasing external static
press
u
re.
Electrical Characteristics
Motor Size HP(kW)
20
8
/3/60
230/3/60
460/3/60
575/3/60
230/1/60
2(1.5)
7.3-10.2
6.9-9.6
3.4-4.8
2.6-3.6
13.3-18.6
3(2.2)
10.1-14.2
9.3-13.0
4.6-6.5
3.7-5.2
17.3-24.2
5(3.7)
15.4-21.6
15.1-21.1
7.5-10.6
6.1-8.5
24.3-34.0
7.5(5.6)
23.1-32.4
21.3-29.8
10.6-14.9
8.3-11.6
32.3-45.2
10(7.5)
30.4-42.6
28.1-39.3
14.0-19.7
10.6-14.8
40.3-56.4
15(11.2)
42.4-59.4
39.3-55.0
19.6-27.5
16.8-23.5
-
20(14.9)
51.4-72.0
49.3-69.0
24.6-34.5
19.8-27.7
-
25(18.6)
66.4-93.0
61.3-85.8
30.6-42.9
24.5-34.3
-
30(22.4)
78.4-109.8
73.3-102.6
36.6-51.3
29.6-41.4
-
40(29.8)
-
-
47.6-66.7
38.0-52.6
-
50(37.3)
-
-
59.5-83.3
48.1-66.7
-
Volts
Wire Gau
g
e
Max Wire
120
18
150' (45 m)
120
16
250' (75 m)
120
14
350' (106 m)
Summary of Contents for XT112
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