RT-SVX063E-EN
49
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..
IIm
mp
po
orrtta
an
ntt:: HIGH VOLTAGE IS PRESENT AT
TERMINAL BLOCK OR UNIT
DISCONNECT SWITCH.
2. Close the disconnect switch or circuit protector
switch that provides the supply power to the unit
terminal block or the unit mounted disconnect
switch.
3. Turn the 115 volt control circuit fused disconnect
switch to the On position.
W
WA
AR
RN
NIIN
NG
G
L
Liiv
ve
e E
Elle
eccttrriicca
all C
Co
om
mp
po
on
ne
en
nttss!!
F
Fa
aiillu
urre
e tto
o ffo
ollllo
ow
w a
allll e
elle
eccttrriicca
all ssa
affe
etty
y p
prre
ecca
au
uttiio
on
nss
w
wh
he
en
n e
ex
xp
po
osse
ed
d tto
o lliiv
ve
e e
elle
eccttrriicca
all cco
om
mp
po
on
ne
en
nttss cco
ou
ulld
d
rre
essu
ulltt iin
n d
de
ea
atth
h o
orr sse
erriio
ou
uss iin
njju
urry
y..
W
Wh
he
en
n iitt iiss n
ne
ecce
essssa
arry
y tto
o w
wo
orrkk w
wiitth
h lliiv
ve
e e
elle
eccttrriicca
all
cco
om
mp
po
on
ne
en
nttss,, h
ha
av
ve
e a
a q
qu
ua
alliiffiie
ed
d lliicce
en
nsse
ed
d e
elle
eccttrriicciia
an
n
o
orr o
otth
he
err iin
nd
diiv
viid
du
ua
all w
wh
ho
o h
ha
ass b
be
ee
en
n p
prro
op
pe
errlly
y ttrra
aiin
ne
ed
d
iin
n h
ha
an
nd
dlliin
ng
g lliiv
ve
e e
elle
eccttrriicca
all cco
om
mp
po
on
ne
en
nttss p
pe
errffo
orrm
m
tth
he
esse
e tta
asskkss..
W
WA
AR
RN
NIIN
NG
G
R
Ro
otta
attiin
ng
g C
Co
om
mp
po
on
ne
en
nttss!!
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 rro
otta
attiin
ng
g cco
om
mp
po
on
ne
en
nttss ccu
uttttiin
ng
g a
an
nd
d sslla
assh
hiin
ng
g
tte
ecch
hn
niicciia
an
n w
wh
hiicch
h 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..
IIm
mp
po
orrtta
an
ntt:: This procedure is for A&B cabinets (20–
55 Ton) only.
4. Compare the static pressure reading to the static
pressure ranges and linkage positions in
Table 17,
p. 51
or
Table 18, p. 52
for the unit configuration,
unit size and operating CFM.
If the static pressure reading is greater than the
pressure listed in
Table 17, p. 51
or
Table 18, p. 52
for outside air damper position 1 then relocate the
outside air connecting rod to balance the outside air
damper pressure drop against the return static
pressure, using the following steps.
If the static pressure reading is less than the
pressure listed in
Table 17, p. 51
or
Table 18, p. 52
for outside air damper position 1, then determine
the appropriate pressure increase needed. Identify
the correct return damper linkage location using
Table 19, p. 52
. Then, relocate the return air
connecting rod to balance the outside air damper
pressure drop against the return static pressure
using the procedure starting in
Step 10
. If no
adjustment is necessary, proceed to the last step.
5. On the outside air damper remove the drive rod and
swivel from the crank arm(s). If only one hole
requires changing, loosen only that end.
6. Manually open the outside air dampers to the full
open position.
7. Manually close the return air dampers.
8. Reattach the drive rod and swivel to the appropriate
hole(s). The length of the drive rod may need to be
adjusted to align with the new hole(s) location. If so,
loosen the lock nut on the drive rod against the
swivel. Turn the swivel “in” or “out” to shorten or
lengthen the rod as necessary. For some holes,
both ends of the rod may need to be adjusted.
9. Tighten the lock nut against the swivel(s). Proceed
to the last step.
10. On the return air damper remove the drive rod and
swivel from the crank arm(s). If only one hole
requires changing, loosen only that end.
11. Manually open the return air dampers to the full
open position.
12. Manually close the outside air dampers.
13. Reattach the drive rod and swivel to the appropriate
hole(s). The length of the drive rod may need to be
adjusted to align with the new hole(s) location. If so,
loosen the lock nut on the drive rod against the
swivel. Turn the swivel “in” or “out” to shorten or
lengthen the rod as necessary. For some holes,
both ends of the rod may need to be adjusted.
14. Tighten the lock nut against the swivel(s).
15. Plug the holes (made during Step 1) after the proper
adjustments have been made.
IIn
nsstta
alllla
attiio
on
n