HydraMaster Corporation
1/18/00
Water and Chemical System
MAXX 450D/470D/450 Diesel
Section 5-1
T
his high pressure chemical system has been designed to be simple and trouble
free.
WATER AND CHEMICAL FLOW OPERATION
The chemical pump draws the chemical from the inlet filter which is in the chemical
container. It flows through the flow meter indicating the GPH’s of chemical being
used. The chemical then flows through the chemical pump to the chemical selector
valve. The chemical valve can be used to prime the pump (evacuate air from the
system), inject chemical into the system or turn the chemical flow off. In the “ON”
position, chemical flows through the metering valve, and is injected into the heated
water path just prior to its leaving the machine.
The low water float switch in the water box, is a safety switch that is designed to
protect your system from sudden or unexpected loss of water supply. If, for ex-
ample, the water source at the house were turned off, the water level of the water
box would drop, activating the low water float switch, which automatically disen-
gages the system and prevents the water pump from running dry.
The desired chemical injection ratio may be obtained by an adjustment of the
chemical flowmeter during the spraying of water through the cleaning tool.
CHEMICAL SYSTEM MAINTENANCE
The chemical lines may need to be flushed with vinegar periodically to prevent abnor-
mal chemical build-up. This flushing may be done by removing the clear plastic hose
from the chemical jug and inserting it into a one quart container of vinegar. This
should be done with the chemical flowmeter setting 10 GPH. Simply spray water
from the wand until the quart of vinegar is exhausted. Then repeat the process with
one quart of clear water to void all lines of vinegar.
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