11
1)
During the ramp cycle, the temperature controller will alternate the display between the normal state and the
ramping notification. The ramping notification displays
“
Attn
”
in the lower display and
“
rP1
”
in the upper display
(“
Attention; Ramping
”).
2)
Indicator will become illuminated when power is being provided to the heater. The temperature controller utiliz-
es a PID control loop to control the heater. This means that during the course of operation the light (indicating
power to the heater) will vary from fully on, blinking quickly, intermittent pulses, or even off for a duration of
time even when the system is heating.
3)
Depending on the fluid being heated and the flow rate, it may take several minutes for the displayed current
temperature to begin to rise.
)
Once the system has reached the desired temperature, the system is ready to spray.
4.3 USING THE WATLOW CONTROL PANEL
The HD15 Heater utilizes an EZ
-
Zone
®
series Watlow temperature controller. The figure below shows the key buttons
and displays of the controller. For more detail, reference the complete manual for the Watlow Temperature Control-
ler.
MOUNTING TO PANEL
1.
Make the panel cutout using the measurements in figure 1.
2.
Remove the green terminal connectors and the mounting collar assembly.
3.
Insert the controller into the panel cutout from the front.
4.
Orient the collar base so the flat side faces front and the screw openings are on the sides (see figure 2), then
slide the base over the back of the controller.
5.
Slide the mounting bracket over the controller with the screws aligned to the collar base. Push the bracket gently
but firmly until the hooks snap into the slots in the case.
6.
Tighten the two #6
-
19 x
1.5”
screws with a Phillips screwdriver until the device is flush to the panel (3 to
4”
lbs.
torque).
7.
Reinstall the terminal connectors to their original locations. (Or first connect field wiring as indicated in this
guide and then reinstall the connectors).
