Chapter 9 – Maintenance
TestEquity 101H Temperature/Humidity Chamber
Page 73
How to inspect/change the water recirculation system filter cartridge
1.
The color of the top half of the cartridge changes gradually from white to brown through
continued use. If the top half is completely brown it should be replaced. Replacement
cartridges are available from TestEquity (our part number 383911).
2.
Use a screwdriver to loosen the clamps from the bottom and top of the filter and remove the
tubing from the barbed fitting on the filter. Be prepared to catch a small amount of water
from the tubes and bottom of the filter with a rag or paper towel.
3.
Lift the filter up to disengaged it from the bottom flange and then pull the bottom of the filter
towards you. Then, pull the filter out of the top flange. Perform the installation in the reverse
order.
4.
If you are using the chamber in a stand-alone mode without any plumbing, refill the water
reservoir per the Water Fill instructions above.
5.
If the chamber is connected to a plumbed and filtered water source, turn the water supply
back on. The reservoir will automatically re-fill to the correct level.
How to listen for abnormal noise or vibration
You should become familiar with normal operating noises. Being able to recognize changes from
normal operating noises can be a valuable way to identify problems and prevent further damage.
Examples of noises to be aware of include:
•
Circulator motor noise (with compressor off).
•
Compressor start-up and running noise.
•
Condenser fan noise.
•
Valve cycling noise.
How to inspect the door seal
The door and chamber opening have silicone gaskets to minimize thermal losses and moisture
migration.
•
Inspect the gaskets for dirt and tears.
•
Repair minor tears with a high quality RTV silicone such as RTV167.
•
Check the integrity of the door seal by closing the door on a sheet of paper. With the door
closed, slowly pull the paper. You should feel the resistance. Repeat this all around the door
at several places.
•
If the seal is not tight on the latch side, adjust the latch bracket. The latch bracket is mounted
to the chamber, and has slotted holes to permit adjustment.
•
If the seal is not tight on the hinge side, adjust the door hinge. The hinges have a slotted hole
on the door side to permit adjustment.
