Marine Air Systems vector compact - Seawater Pump and Plumbing

Marine Air Systems vector compact

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SEAWATER

PUMP

AND

PLUMBING

Seawater

temperature

will

directly

affect

the

a/c unit's

efficiency.

This

a/c

unit

can

effectively

cool

your

boat

in

water

temperatures

up

to

90°F

and

heat

(if

reverse

cycle

option

is

installed)

in

water

as

low

as

40°F.

Several

guidelines

should

be

followed

during

the

installation

of

the

seawater

system.

Since

the

circulation

pump

is

centrifugal

and

not

self-priming,

it

must

be

mounted

so

that

it

is

always

at

least

one

foot

below

the

water

line

regardless

of

which

tack

the

vessel

is

on.

The

pump

may

be

mounted

horizontally

or

vertically,

however

the

discharge

must

always

be

above

the

inlet.

If

possible,

the

pump

head

should

be

rotated

toward

the

direction

of

water

flow.

Install

the

seawater

speed

scoop

intake

as

far

below

the

water

line

and

as

close

to

the

keel

as possible

in

any

application,

but

especially

on

a

sailboat,

to

keep

the

intake

in

the

water

so

that

air

does

not

get

into

the

system

when

the

boat

heels

over.

The

speed

scoop

intake

must

face

forward

and

not

be

shared

with

any

other

pump.

A

seacock

(shut

off

valve)

must

be

installed

directly

on

the

speed

scoop

outlet.

A

seawater

strainer

is

mandatory

between

the

seacock

and

pump.

Failure

to

install

a

seawater

strainer

will

void

the

pump

warranty.

The

seawater

system

should

be

installed

with

an

upward

incline

from

the

speed

scoop

&

sea

cock,

through

the

strainer,

to

the

inlet

of

the

pump

and

then

up

to

the

inlet

of

the

a/c

unit's

condenser

coil.

The

discharge

from

the

a/c

unit

should

then

run

to

the

seawater

outlet

through

hull

fitting

which

should

be

located

where

it

can

be

visually

checked

for

water

flow

and

as

close

as

practicable

to

the

waterline

to

reduce

noise.

Use

only

reinforced

marine

grade

hose.

All

hose

connections

shall

use

double/reversed

stainless

steel

hose

clamps.

Below

is

an

installation

summary:

1.

Install

the

speed

scoop

thru-hull

inlet

as

close

to

the

keel

and

as

far

below

the

water

line

as

possible,

facing

forward.

Bed

the

scoop

with

a

marine

sealant

designed

for

underwater

use.

2.

Install

a

bronze,

full

flow

seacock

on

the

speed

scoop

thru-hull

inlet.

3.

Install

a

seawater

strainer

below

the

level

of

the

pump

with

access

to

filter.

4.

Mount

the

pump

at

least

one

foot

below

the

waterline

and

above

the

strainer.

5.

Connect

the

seacock,

strainer

and

pump

with

an

uphill

run

of

reinforced

marine

hose.

6.

Connect

the

discharge

from

the

pump

uphill

to

the

bottom

inlet

of

the

a/c

unit's

condenser

coil.

7.

Avoid

loops,

vertical

bends

(high

spots)

or

the

use

of

90°

elbows

with

seawater

hose

(each

90°

elbow

is

equivalent

to

2.5'

of

hose

and

a

90°

elbow

on

the

pump

is

equivalent

to

20'

of

hose).

8.

Double

clamp

all

hose

connections

with

stainless

steel

clamps,

reversing

the

clamps.

9.

Use

teflon

tape

on

all

threaded

connections.

10.

Connect

all

metallic

parts

in

contact

with

seawater

to

the

vesseVs

bonding

system

including

the

speed

scoop

inlet,

strainer,

pump

and

the

air

conditioner.

CORRECT

STEADY

UPWARD

FLOW FROM

INLET

TO

UNIT

THEN

DOWNWARD

TO

OUTLET,

HOSES

DOUBLE/REVERSED

CLAMPED

DOUBLE HOSE

CLAMPS

TO

BE

REVERSED

INCORRECT

HOSES

MUST

NOT

HAVE

KINKS,

LOOPS

OR

HIGH

SPOTS

WHERE

AIR

CAN

BE

TRAPPED

INCORRECT

STRAINER

MUST

BE

BELOW

PUMP,

HOSES

MUST

BE

DOUBLE

CLAMPED

INCORRECT

PUMP

&

STRAINER

MUST

BE

BELOW

WATER

LINE

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