Settings; Temperature Control - Graco Aerobotix RC50 Instructions Manual

Settings

Temperature Switch Pressures
Pressure Switch Pressures
Settings

Temperature Control

The high and low temperature setpoints on the HMI are
used to alert the operator of an out-of-limit condition.
When these alarms are triggered, the pumps will still
function and pouring will not be stopped.
There is a mechanical heater switch that will shut off
power to the heater if the chemical temperature goes
above the setting. The pumps will continue to run if the
heater is shut off so that the chemical can be cooled by
flowing through the Heat Exchanger.
Built into the HMI program there is an absolute high
temperature alarm that will shut down the pumps when
triggered.
A MAG drive over-temperature alarm is provided to pre-
vent motor overheating. See table at beginning of this
section for alarm setting.
313813A
MAG drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170° F (76.7°C)
Chemical Absolute High Temperature . . . . . . . . . . . . . . . . . . . 180°F (82.2°C)
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180°F (82.2°C)
Max Metering Pump Outlet . . . . . . . . . . . . . . . . . 3200 psi (22.0 MPa, 220 bar)
Min Metering Pump Inlet . . . . . . . . . . . . . . . . . . 10 psi (0.068 MPa, 0.68 bar)
Day Tank Operating Air Pressure . . . . . . . . . . . . . . 40 psi (0.27 MPa, 2.7 bar)
Supplied Air Pressure . . . . . . . . . . . . .80-120 psi (0.55-0.83 MPa, 5.5-8.3 bar)
Day Tank Pressure Relief Valve . . . . . . . . . . . . . . . 75 psi (0.51 MPa, 5.1 bar)
Supplied Water Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 psi (2.76 bar)
Supplied Water Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65°F (18°C)
Temperature Control On/Off
The temperature control should always be turned on
when the machine is turned on unless there is a spe-
cific reason not to. With the temperature control
turned off, the chemical temperature will slowly heat
up until it eventually triggers one of the over-tempera-
ture alarms. If the MAG drive over-temperature alarm
caused the shutdown, the machine will not be able to
be started until the machine has cooled to signifi-
cantly below the over-temperature setting.
Temperature Control is turned on/off from the Tank Con-
trol screen, see F
Control turned on, the heat exchanger and heater will
work to maintain each chemical temperature to the input
temperature setpoint. The heat exchanger works to cool
the fluid with water from the inlet. Water inlet valves con-
trol cooling by cycling open and closed as necessary.
The heater works to heat the material by exposing the
chemical to heated rods that are turned on and off as
necessary.
Temperature Setpoint
The temperature setpoint is the goal temperature for the
chemical. The machine will automatically maintain the
temperature of the chemical within a reasonable range
from the input temperature setpoint based on the cur-
rent gain settings, see Temperature Gains, page 46.
NOTICE
. 10 on page 23. With Temperature
IG
Settings
45