Hunter 50 - Pumps (Fresh Water, AC Cooling)

Hu
nt
e
r
50
• Water S
y
stems
9
.4
9
.3 Pum
p
s
O
n board
y
our boat there are both
f
resh water and raw
water pumps that control the flow of water to the related
c
omponents.
Th
ese are e
l
ectr
i
ca
lly
powere
d
pumps .
S
ome o
f
the
f
eatures o
f
these pumps are
:
•Smooth Flo
w
•
S
el
f
-Primin
g
up to 10
f
eet
(
3m
)
• Dr
y
runnin
g
capabilit
y
• Soft noise absorbin
g
mounts
•
S
nap-
f
it port
f
ittin
g
s
• Built-in b
y
pass — less pulsation
• R
educes
n
eed
f
o
r
accu
m
u
l
a
t
o
r t
a
n
k
•
C
orrosion resistant materials
Remember to read your OEM manuals for complete informa-
tion, as well as safety warnings, or notices.
9.3.1 Fresh Water Pum
p
The fresh water pump supplies water to the s
y
stem
under pressure when the potable water suppl
y
is not
co
nn
ec
t
ed
.
The FRE
S
H WATER P
U
MP breaker switch is on the D
C
side o
f
the MDP. When the breaker is switched to
O
N,
t
h
e pumps w
ill
run unt
il
t
h
e
h
ot an
d
co
ld
water s
y
stems
are pressurized. An automatic pressure switch shuts the
pumps o
ff
until the pressure drops to a preset level
(f
or
e
xample, a pressure drop caused b
y
openin
g
a faucet
)
.
The pumps will then run a
g
ain until the s
y
stem is pressur-
ized and turn itsel
f
o
ff
. The pumps have a build-in check
valve to prevent backflow throu
g
h the pumps
.
Th
e
fr
es
h w
a
t
e
r w
as
h
do
wn
co
nn
ec
ti
o
n i
s
l
oca
t
ed
o
n th
e
t
r
a
n
so
m.
Important: Operate the fresh water pumps only when there
is water in the tank. Running the pumps dry will damage the
diaphragm.
Note: If the pumps run from time to time even though no water
is being used, a leak in a water line is a likely cause. Check all
lines for leaks and repair immediately.
9
.3.2 A/C Coolin
g
Pump
Your boat ma
y
be equipped with the optional air condi-
tioner reverse c
y
cle unit. This t
y
pe of unit can heat or
c
oo
l
y
our
b
oat.
The Air Conditionin
g
s
y
stem is made up of a pickup valve
(
or thru hull
)
(
See Underwater Gear for its location
)
, a sea
strainer, an A
/C
coolin
g
pump, and the ma
j
or compres-
so
r
s
a
n
d
a
ir h
a
n
d
l
e
r
s.
To
f
ind the A
/C
coolin
g
pumps’ location re
f
er to the
arran
g
ement illustration at the end of this chapter or the
M
echanical Arran
g
ement at the end of the Boatin
g
Safet
y
C
hapter.
The A/C coolin
g
pump receives sea water from the pick-
up strainer and pumps it throu
g
h the A
/C
compressor to
c
ool the compressor.
S
ee the A
C
Electric
S
ection
f
or an explanation o
f
the
e
lectrical controls o
f
this s
y
stem.
9
.3.4.1 To o
p
erate the air conditioner
:
1.
Op
en the air conditioner seacock. The valve is o
p
en
wh
e
n it
s
h
a
n
d
l
e
i
s
in lin
e
with th
e
h
ose
. Th
e
seacoc
k i
s
located to the port side o
f
the Lazarette area, a
f
t o
f
the
A/C pump, in the bil
g
e.
2.
C
heck the strainer.
C
lean i
f
necessar
y
to assure a
stead
y
flow of water to the unit.
3
.
S
et the thermostat to the temperature desired.
Important: Be sure to close air conditioner seacock
when the air conditioner is not in use. Refer to the man-
ufacturer’s owner’s manual furnished with the air con-
ditioner for more information regarding its operation.
9
.3.3 Toilet water suppl
y
The toilet aboard
y
our boat is supplied with flushin
g
water
f
rom the
f
resh water s
y
stem.
M
ore information concernin
g
the operation and main-
Fig 9.3