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Remote Condensing Unit Installation Instructions
©2019 Tecumseh Compressor Company LLC. All rights reserved.
TPC Part #71511 | Rev A 05/13/2019
www.tecumseh.com
• The regulating valve must be equipped with two pressure gauges:
– One gauge to measure cylinder pressure
– One gauge to measure discharge or down stream pressure
• Use a pressure relief valve.
– In addition to pressure regulating valve and gauges, always install a pressure relief valve. This can also be
a burst disc type pressure relief device. This device should have a discharge port at least ½” NPT size.
The valve or frangible disc device must be set to 175 psig.
• Do not pressurize the system beyond 150 psig field leak test pressure.
• Disconnect nitrogen cylinder and release the pressure in the system before evacuating
and connecting a refrigerant container.
Nitrogen pressurizing method can be used for gross leak detection. A more detailed leak check with refrigerant leak
detectors is necessary. Use only the refrigerant noted on the serial label.
PRESSURE CONTROLS
Always protect low (or dual) pressure control from excessive high pressure. It is recommended to disconnect
the low-pressure (or the low side of the dual pressure) control prior to pressurization.
SYSTEM EVACUATION
Following the pressure testing for leaks, the system must be evacuated.
Confirm system pressure of 0 psi before connecting vacuum pump to system.
Use a vacuum pump (not a compressor) to draw a vacuum of 500 microns or less from both sides of the system.
Do not attempt to draw a vacuum on the system with the pump connected only on the low side. The high side
of the system should be interconnected with the low side by using a minimum 3/8” OD copper tube.
Use a good electronic gauge to measure the vacuum because a refrigeration gauge cannot provide an
accurate reading at this resolution.
Break the vacuum with dry nitrogen.
Note: Never use a compressor to evacuate a system. Instead, use a high pressure vacuum pump specifically
designed for that purpose. Never start the compressor while it is under a deep vacuum. Always break the vacuum
with a refrigerant charge before energizing the compressor. Failure to follow these instructions can damage the
hermetic terminal. As always, to avoid serious injury or death from terminal venting with ignition, never energize
the compressor unless the terminal cover is securely fastened.
Summary of Contents for Argus
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