32
Do not place any part of the body in the path of the
material spray.
Do not point the gun at or near other personnel.
Do not look into the Mixing Chamber orifice at any
time.
Because of the hazardous materials used in this
equipment, it is recommended that the operator
use an air mask, goggles, protective clothing, and
other safety equipment as prescribed by current
regulations, recommendations of the chemical sup-
pliers, and the laws in the area where the equip
ment is being used.
The system will dispense liquid at high pressure
when Gun Trigger is activated. Read and note
WARNINGS contained in this User Manual and
the Probler P2 Gun User Manual, GC-1386.
The Polyol will expand in the Hose if any normal
operating pressures are bled off whenever the mate-
rial is above approximately 75 degrees F. Hot Polyol
hoses should never be bled, by any method, to zero
pressure for two reasons.
1. The seals in the Gun rely on high pressure to make
their seal. The high pressure cannot be maintained if
the pumps are attempting to apply this pressure
through a hose full of expanded froth; therefore, the
Gun seal may leak.
2. Re-starting immediately after hot Polyol has ex-
panded in the system may result in spraying sub-
stantial amounts of “bad” foam. This will continue un-
til the expanded Polyol in the primary Heater and the
Hose has been completely purged
.
Over Pressure System Protection
The system incorporates monitors for high
pressure monitoring. These monitoring devices will
prevent the system from continued operation if
high pressure situations develop.
There are pressure sensors located on each propor-
tioning pump. The high pressure sensor is located at
the outbound of the fluid section.
The high pressure monitoring sensor will engage if
fluid pressure increases above 2000 psi.
If a high pressure situation develops, the sensor will detect
this and immediately engage the hold-in circuit.
This will disengage power to the air motor and will also
turn the heaters off
.
On the control box panel, there are three yellow lighted push
buttons marked over pressure. One of these push buttons
will be illuminated after the monitoring sensor engages, indi-
cating where the problem is located
(ISO, Poly, or Hose).
In the over pressure situation, the system will remain shut-
down until it is manually reset.
At this point, it is necessary to determine if the problem is an
over pressure situation.
When the sensor engages, the system will be frozen, giv-
ing you the pressure readings at the time the problem was
detected.
Inspect the fluid pressure gauges, in an over pressure situ
-
ation, one of the fluid pressure gauges will be significantly
higher than the other gauge.
When main power to unit is on, the console will have wires
that are live. Disconnect or turn off main power source be-
fore opening console to make any repairs.
Before performing any repairs on the system,
ALL AIR and FLUID PRESSURES SHOULD BE RELIEVED
TO ZERO (BLEED-OFF)!
Section 3 - General Information: Troubleshooting
Summary of Contents for Guardian A5-6000 IP
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