40
WSHP-SVX015C-EN
Figure 43.
Through the base electrical option 12.5 to
20 tons
Field Installed Control Wiring
An overall layout of the various control options
available with the required number of conductors for
each control device.
N
No
otte
e:: All field wiring must conform to NEC guidelines
as well as state and local codes.
Control Power Transformer
The 24 volt control power transformers are to be used
only with the accessories called out in this manual.
Transformers rated greater than 50 Vac are equipped
with internal circuit breakers. If a circuit breaker trips,
turn “Off” all power to the unit before attempting to
reset it.
W
WA
AR
RN
NIIN
NG
G
H
Ha
azza
arrd
do
ou
uss V
Vo
olltta
ag
ge
e!!
F
Fa
aiillu
urre
e tto
o d
diisscco
on
nn
ne
ecctt p
po
ow
we
err b
be
effo
orre
e sse
errv
viicciin
ng
g cco
ou
ulld
d
rre
essu
ulltt iin
n d
de
ea
atth
h o
orr sse
erriio
ou
uss iin
njju
urry
y..
D
Diisscco
on
nn
ne
ecctt a
allll e
elle
eccttrriicc p
po
ow
we
err,, iin
nccllu
ud
diin
ng
g rre
em
mo
otte
e
d
diisscco
on
nn
ne
eccttss b
be
effo
orre
e sse
errv
viicciin
ng
g.. F
Fo
ollllo
ow
w p
prro
op
pe
err
llo
occkko
ou
utt//tta
ag
go
ou
utt p
prro
occe
ed
du
urre
ess tto
o e
en
nssu
urre
e tth
he
e p
po
ow
we
err
cca
an
n n
no
ott b
be
e iin
na
ad
dv
ve
errtte
en
nttlly
y e
en
ne
errg
giizze
ed
d.. V
Ve
erriiffy
y tth
ha
att n
no
o
p
po
ow
we
err iiss p
prre
esse
en
ntt w
wiitth
h a
a v
vo
ollttm
me
ette
err..
The transformer is located in the control panel. The
circuit breaker is located on the left side of the
transformer and can be reset by pressing in on the
black reset button.
Controls Using 24 VAC
Before installing any connecting wiring, refer to the
Unit Dimensions section for the electrical access
locations provided on the unit and the
Electromechanical thermostat 24 Vac conductors with
ReliaTel
™
for AC conductor sizing guidelines.
1. Use copper conductors unless otherwise specified.
2. Ensure that the AC control wiring between the
controls and the unit’s termination point does not
exceed three (3) ohms/conductor for the length of
the run.
N
NO
OT
TIIC
CE
E
C
Co
om
mp
po
on
ne
en
ntt F
Fa
aiillu
urre
e!!
R
Re
essiisstta
an
ncce
e iin
n e
ex
xcce
essss o
off 3
3 o
oh
hm
mss p
pe
err cco
on
nd
du
ucctto
orr
cco
ou
ulld
d rre
essu
ulltt iin
n cco
om
mp
po
on
ne
en
ntt ffa
aiillu
urre
e d
du
ue
e tto
o
iin
nssu
uffffiicciie
en
ntt A
AC
C v
vo
olltta
ag
ge
e ssu
up
pp
plly
y..
D
Do
o n
no
ott e
ex
xcce
ee
ed
d tth
hrre
ee
e ((3
3)) o
oh
hm
mss p
pe
err cco
on
nd
du
ucctto
orr ffo
orr
tth
he
e lle
en
ng
gtth
h o
off tth
he
e rru
un
n..
3. Be sure to check all loads and conductors for
grounds, shorts, and mis-wiring.
4. Do not run the AC low voltage wiring in the same
conduit with the high voltage power wiring.
5. Route low voltage wiring per illustrations.
Table 5. Electromechanical thermostat 24 Vac
conductors with ReliaTel
™
™
Distance from Unit to
Control
Recommended Wire
Size
000 - 460 feet (000 - 140 m)
18 gauge (0.75 mm2)
461 - 732 feet (141 - 223 m)
16 gauge (1.3 mm2)
733 - 1000 feet (224 - 305 m)
14 gauge (2.0 mm2)
Controls Using DC Analog Input/Outputs
(Standard Low Voltage Multiconductor
Wire)
Before installing any connecting wiring between the
unit and components utilizing a DC analog input\output
signal, refer to Unit Dimensions for the electrical access
locations provided on the unit.
1. The DC conductors zone sensor module wiring
table lists the conductor sizing guidelines that must
be followed when interconnecting the DC binary
output devices and the system components
utilizing a DC analog input\output signal to the unit.
N
No
otte
e:: Resistance in excess of 2.5 ohms per conductor
can cause deviations in the accuracy of the
controls.
2. Ensure that the wiring between controls and the
unit’s termination point does not exceed two and a
half (2.5) ohms/conductor for the length of the run.
