Oce Arizona 365 GT, User Manual

Page: 195 / 234

Fill the Coolant Reservoir
Introduction
The coolant is a thermal fluid used to maintain the temperature of the ink in the printheads and
ink reservoirs on the carriage. Temperature control of the ink is required in order to achieve the
correct ink viscosity, which affects the jetting velocity of the ink and thus the quality of printed
images. The coolant is pumped past a heater that has a thermostat to maintain the coolant
temperature. The coolant flows in series through each of the printheads and then returns to the
coolant reservoir. Each printhead has an internal sensor that provide temperature feedback. The
reservoir block also has a sensor to provide feedback. The coolant reservoir contains an optical
level sensor. A sight tube on the side of the gantry, at the opposite end from the carriage,
displays the level of coolant in the reservoir. The operator must maintain this level.
Purpose
If the coolant level is low, the ink and printheads cannot be maintained at the proper temperature.
Periodically check the level of coolant and add more coolant if it is below the center of the sight
tube.
When to do
Check the coolant level sight-tube, located at the side of the gantry, to verify that the level is low.
When filled to the proper level, the fluid will be at the center of the sight-tube. If the level of
coolant is lower than the center, it is time to fill it. Keep the coolant at the correct level to maintain
the proper ink temperature as the coolant is important to that process.
NOTE
Change the coolant fluid at least one time every 12 months with new coolant. Over time and
with use, crystal deposits build up in the coolant and can impede the flow and result in pump
damage. Consult your service representative for details.
Before you begin
Verify that the coolant level is below the center of the sight-tube. If it is at the center or higher, it
is not necessary to add coolant. The sight-tube is located on the side at the right end of the
gantry.
Syringe (supplied with Starter kit)
Wear gloves (coolant will not harm the skin, but gloves are recommended).
Coolant
Fill the Coolant Reservoir
Chapter 11 - Printer Maintenance 195