Fill The Coolant Reservoir - Oce Arizona 200 GT User Manual

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 print-
heads 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 feed-
back. 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.
Fill the Coolant Reservoir
Chapter 12 - Printer Maintenance 263