70
SS-SVX11K-EN
Table 25.
Economizer actuator circuit legend (continued)
Device
Designation
Device Designation
Parts And Notes
MP
Minimum Position
Potentiometer
M.H. S96A1012
EFI
Evaporator Fan Interlock
Field Provided
7TB88
Low Voltage Terminal Strip
Located in Temperature Controller Panel
R
1/4 Watt - 5% Carbon
1 Motor/Circuit = None Req; 2 Motors/ circuit = 1300 Ohms; 3 Motors/Circuit = 910 Ohms
No System Control
Temperature Control Parameters
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..
Each unit ordered with the “No Controls” option,
requires a field provided and field wired temperature
controller. Single refrigerant circuit units require a 2-
step control device, and dual refrigerant circuit units
require a 4-step (20 to 60 ton units) or 6-step (80-120
ton units) control device.
Each unit is shipped from the factory with internal
“Fixed-On” & “Fixed-Off” time delays wired into each
step of cooling. The “Fixed-Off” timers are 5 minutes
each and they begin timing when the circuit for that
step of cooling is deactivated. The “Fixed-On” timers
are 3 minutes each and they begin timing when the
circuit for that step is activated.
N
No
otte
e:: Units ordered with the “No Controls” option
cannot be used with EVP Chiller applications.
