Chapter 9 – Maintenance
Page 84
TestEquity 101H Temperature/Humidity Chamber
Refrigeration System Charging Instructions
!
WARNING:
Repair of the refrigeration system must be performed only by a properly
trained mechanic. Do NOT substitute any component. Do NOT substitute
refrigerants. Improper repairs will void the warranty.
These instructions are intended as guidelines for repairing TestEquity chambers. Details such as
how to attach a gauge manifold are not covered. These are NOT do-it-yourself instructions!
Refrigerant Charge
The proper charging procedure is as follows:
1.
Repair any leaks before recharging. Replace the filter/drier.
2.
Evacuate the system to 100 microns. DO NOT GUESS! You must use a micron gauge.
3.
Use a charging scale to measure in the correct weight of refrigerant as shown on the
Model/Serial label on the back of the chamber. DO NOT GUESS! You must use an accurate
charging scale.
4.
Verify the cooling performance as outlined in “How to verify the chamber performance”.
