HDWA-SVX001D-EN
65
the refrigerant condensing temperature and the leaving
condenser water temperature) is higher than predicted.
Condenser tube fouling is indicated when the approach
temperature (the difference between the condensing
refrigerant temperature and the leaving condenser
water temperature) is higher than predicted. Refer to
sales order selection data for approach temperatures.
N
No
otte
e:: Glycol in the water system typically doubles the
standard approach.
If the annual condenser tube inspection indicates that
the tubes are fouled, two cleaning methods
(mechanical or chemical) can be used to rid the tubes
of contaminants. The methods are described in the
following sections.
Mechanical Cleaning
Mechanical tube cleaning is used to remove sludge and
loose material from smooth-bore condenser tubes.
W
WA
AR
RN
NIIN
NG
G
H
He
ea
av
vy
y O
Ob
bjje
eccttss!!
F
Fa
aiillu
urre
e tto
o p
prro
op
pe
errlly
y lliifftt w
wa
atte
errb
bo
ox
x cco
ou
ulld
d rre
essu
ulltt iin
n
d
de
ea
atth
h o
orr sse
erriio
ou
uss iin
njju
urry
y..
E
Ea
acch
h o
off tth
he
e iin
nd
diiv
viid
du
ua
all cca
ab
blle
ess ((cch
ha
aiin
nss o
orr sslliin
ng
gss))
u
usse
ed
d tto
o lliifftt tth
he
e w
wa
atte
errb
bo
ox
x m
mu
usstt b
be
e cca
ap
pa
ab
blle
e o
off
ssu
up
pp
po
orrttiin
ng
g tth
he
e e
en
nttiirre
e w
we
eiig
gh
htt o
off tth
he
e w
wa
atte
errb
bo
ox
x.. T
Th
he
e
cca
ab
blle
ess ((cch
ha
aiin
nss o
orr sslliin
ng
gss)) m
mu
usstt b
be
e rra
atte
ed
d ffo
orr
o
ov
ve
errh
he
ea
ad
d lliiffttiin
ng
g a
ap
pp
plliicca
attiio
on
nss w
wiitth
h a
an
n a
acccce
ep
ptta
ab
blle
e
w
wo
orrkkiin
ng
g llo
oa
ad
d lliim
miitt.. R
Re
effe
err tto
o tth
he
e tta
ab
blle
e ffo
orr w
wa
atte
errb
bo
ox
x
w
we
eiig
gh
httss..
Waterbox Removal
Review mechanical room limitations and determine the
safest method or methods of rigging and lifting the
waterboxes.
IIm
mp
po
orrtta
an
ntt::
•
Do NOT rotate waterboxes.
•
Be sure to replace water boxes right-
side-up to maintain proper baffle
orientation. Use new O-rings.
•
if the waterbox is reversed, be sure to
match mark on the baffle and waterbox
to ensure that they are aligned.
1. Determine the size of chiller being serviced. See
unit nameplate located on chiller control panel.
2. Use a 3/8-in. (9.5-mm) rigging shackle for waterbox
removal as shown in the following figure. The rated
lifting capacity of the selected lift connection device
must meet or exceed the published weight of the
waterbox. Refer to the tables in
.
3. Install rigging shackle onto the lifting connection on
the waterbox.
4. Disconnect water pipes, if connected.
5. Match mark on the waterbox and the baffle to
ensure that they are aligned.
6. Remove waterbox bolts.
W
WA
AR
RN
NIIN
NG
G
O
Ov
ve
errh
he
ea
ad
d H
Ha
azza
arrd
d!!
F
Fa
aiillu
urre
e tto
o ffo
ollllo
ow
w iin
nssttrru
uccttiio
on
nss cco
ou
ulld
d rre
essu
ulltt iin
n
d
de
ea
atth
h o
orr sse
erriio
ou
uss iin
njju
urriie
ess..
N
Ne
ev
ve
err sstta
an
nd
d b
be
ello
ow
w o
orr iin
n ccllo
osse
e p
prro
ox
xiim
miitty
y tto
o
h
he
ea
av
vy
y o
ob
bjje
eccttss w
wh
hiille
e tth
he
ey
y a
arre
e ssu
ussp
pe
en
nd
de
ed
d ffrro
om
m,,
o
orr b
be
eiin
ng
g lliifftte
ed
d b
by
y,, a
a lliiffttiin
ng
g d
de
ev
viicce
e iin
n cca
asse
e tth
he
e
o
ob
bjje
ecctt d
drro
op
pss..
7. Lift the waterbox away from the shell.
8. Store the waterbox in a safe and secure location
and position.
9. Work a round nylon or brass bristled brush
(attached to a rod) in and out of each of the
condenser water tubes to loosen the sludge.
10. Thoroughly flush the condenser water tubes with
clean water.
N
No
otte
e:: To clean internally enhanced tubes, use a bi-
directional brush or consult a qualified
service organization for recommendations.
