Graco Inc. EM390 User Manual download pdf (Page 8)

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SETUP

If you are supplying your own hoses and spray

gun,

be sure the hoses

are electrically conductive,

that

the gun has a

tip guard, and that each part is

rated for at least

2500 psi (172 bar) Maximum

Working

Pressure

. This is to reduce the

risk of se

-

rious bodily injury caused by static sparking,

fluid

injection

or over-pressurization and

rupture of the

hose

or gun.

WARNING

To avoid damaging the pressure control, which

may result in poor equipment performance and

component

damage, follow these precautions.

1. Always use nylon spray hose at least 50 ft.

(15.2

m) long.

2. Never

use a wire braid hose; it is too rigid to act

as

a pulsation dampener

.

3. Never install any shutoff device between the

filter

and the main hose. See Fig 9–1.

4.

Never plug the filter outlet.

CAUTION

1. Connect the hose and gun.

See Fig 9–1.

a. Remove

the plastic cap plug from the filter outlet

nipple

and screw a minimum 50 ft. (15.2 m)

fluid

hose

onto the nipple.

b. Connect

the 3 ft. (0.9 m) whip hose between

the

fluid

hose and the gun inlet connection, for more

flexible gun movement. If you have a Flex gun,

route the hose through the hose guard before

connecting

it to the gun.

c. DO

NOT

use thread sealant, and DO NOT install

the

spray tip yet!

2. Fill the packing nut/wetcup 1/3 full with Graco

Throat

Seal Liquid (TSL), supplied. Remove the plas

-

tic

plug from the top of the pump first. See Fig 9–1.

3.

Check the electrical service.

a. Be

sure the electrical service

is 120 V

, 60 HzAC,

15 Amp (minimum), and that the outlet you use

is

properly grounded.

b. DO

NOT remove the grounding prong of the

plug,

and

do not use an adapter

.

c. Use

a grounded extension

cord which has 3 wires

having a minimum 12 gauge size, and a

maximum

length of 200 ft. (61 m). Longer lengths

or smaller gauges will affect sprayer

performance.

Proper

grounding is essential to reduce the risk of

static

sparking which can cause a fire or explosion

and result in serious bodily injury and property

damage.

Read

the warning section FIRE OR

EXPLOSION

HAZARD

on page 3 of this manual and ground the

spray

system as explained there.

WARNING

4.

Plug in the sprayer

.

a. Be

sure the

ON/OFF switch is OFF

. See Fig 9–1.

b. Plug

the power supply cord into a grounded

elec

-

trical

outlet that is at least 20 ft. (6 m) away from

the

spray area to reduce the chance of a spark ig

-

niting

the spray vapors.

c. Do

not remove the third prong of

the power sup

-

ply

cord plug, which is the grounding prong,

and

do

not use an adapter

.

5. Flush the pump

to remove the lightweight oil which

was

left in the pump to protect it from rust. Refer to the

flushing

guidelines on pages 13 and 14.

6. Prepare the paint according to the manufacturer’s

recommendations.

a. Remove

any skin that may have formed.

b.

Stir the paint to mix pigments.

c. Strain the paint through a fine nylon mesh bag

(available at most paint dealers) to remove par-

ticles

that could clog the filter or spray tip. This is

probably

the most important step toward trouble-

free

spraying.

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