Water Cooler Instruction Manual
Model: 826A
© Aurora Scientific, 2015 VER. 1.00
page 7
Figure 2: Filling Coolant Reservoir
NOTE: Be careful not to overfill the reservoir, since any overflow from the reservoir will drain
directly into the 826A case. You should fill the reservoir to approximately 1.5cm (1/2”) from the
top of the reservoir. If you should overfill the reservoir, screw the cap back on, place a towel under
the liquid circulator and tilt the unit from left to right to drain the liquid from the case. Under no
circumstances should you turn the 826A upside down to drain overflow liquid from the case since
this will damage the fan due to the liquid draining through the fan. .
Once the reservoir has been filled, switch on the 825A to allow the pump to fill the rest of the system and
tubing with coolant. When the system begins running for the first time the fluid inside the reservoir will
begin to drain. As this happens continue to fill the reservoir with distilled water until the draining has
stopped. Once full, replace the cap and unplug the power adapter from the system until ready for use.
If the fluid refuses to flow through the system immediately when power is connected, it is likely that the
pump is still dry. In this case you may attempt to prime the pump by slightly tilting the unit back and
forth to encourage the liquid to flow. Once the pump has begun to circulate, you may replace the
circulation hoses to the test system.
2.3
Positioning the Unit
Positioning the coolant circulator correctly is essential to its proper operation. Firstly the unit should be
positioned a reasonable distance away from the actual test system as vibration from the pump and fan
will make mechanical measurements noisy. If the test system is mounted on a vibration isolation table,
DO NOT locate the coolant circulator on it as this will cause vibration noise to appear in the data.
Since the head pressure generated by the pump is small, the 826A Water Cooler should be mounted
slightly above or at about the same height as the test system. Take care to mount the unit within ±0.5m
of the height of the 800-series apparatus or the circulator will have trouble driving coolant through the
entire loop.
