Water Supply - Graco AquaMax 3540GHW Instructions Manual

INSTALLATION & PREPARATION
INSTRUCTIONS

Water Supply

Select a water supply hose which is a quality grade of
garden hose measuring at least 3/4" ID and no longer
than 50 feet.
Check the water inlet strainer to ensure it is clean and
free of any obstructions. Periodic cleaning of the water
strainer will help prevent pump problems.
As a strainer becomes obstructed, it restricts proper
flow of water to the pump. This can result in cavita-
tions which will cause premature failure of pump
packings.
1. Unscrew the strainer cap from the unit.
2. Remove strainer screen, clean or replace if
necessary.
Connect the hoses.
1. Connect one end of the water supply hose to the water
inlet of the unit.
2. Connect the other end of the hose to your pressurized
water supply.
Note: When connecting the water inlet to the water
supply mains, local regulations of your water company
must be observed. In some areas, the unit must not be
connected directly to the public drinking water supply.
This is to ensure there is no feedback of detergents
into the water supply. (Direct connection is permitted
if the backflow preventer is installed. Check with local
authorities for approval.)
10
NOTICE
Note: If the mineral content of the water in your area is
extremely high, the use of a water softener is recom-
mended to prevent the possibility of excessive scale
buildup inside the heat exchanger coil.
Follow the incoming water requirements listed below:
1. Water pressure must be a minimum of 20 pounds per
square inch (PSI) and a maximum of 125 PSI. (A typical
outdoor faucet will generally supply this PSI if turned
completely "ON".)
2. Incoming GPM must be approximately one gallon more
than the outgoing GPM stated on the pressure washer
nameplate. (You can check GPM by timing how long
it takes to fill a 5 gallon container.)
Incoming water temperature must not exceed
125°F. Excessive pump damage may result if the
water temperature exceeds this acceptable level.
Damage to the equipment could occur. Never allow
the unit to operate without the incoming water line
attached and the water supply completely turned
on.
NOTICE
NOTICE