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To ensure proper functioning and to avoid false readings, the discharge line thermostat must be
installed and insulated according to the procedure and recommendations hereunder.
Assembly of the discharge line thermostat
▪
Install the discharge line thermostat on the
discharge tube 120 mm from top cap.
▪
Snap the retainer clip over the tube and onto
the thermostat.
▪
The thermostat should be placed on the
discharge tube so that its body is in upward
position on a horizontal tube installation.
▪
Ensure that the thermostat is not tilted.
▪
The wire must not be in contact with the top
cap of the compressor or the discharge tube.
Care should be taken to route wires so that
they do not come into contact with sharp
objects.
▪
To avoid any impact on tripping temperature
by the ambient, the discharge line thermostat
must be insulated.
▪
Wrap thermal insulation around the pipe left
and right of the thermostat and secure it with
plastic straps.
▪
Wrap a second layer of insulation around the
first one and around the thermostat, and
secure it with plastic straps.
3.7 Internal pressure relief valve
An internal pressure relief valve is provided on Copeland Scroll compressor models YBD*K1E. It
opens at a differential pressure of 28 bar ± 3 bar between high- and low-pressure sides. A high-
pressure protection must be provided by the system manufacturer/installer for each system and
according to EN 378-2, clause 6.2.6.2. The IPR valve is a safety device, not a high-pressure switch.
It is not designed for repeated operation and there is no guarantee that it will reset correctly if it does
have repeated operation.
3.8
Discharge check valve
Compressor models YH*K1E contain an internal check valve on the discharge connection. The
discharge check valve prevents the high-side, high-pressure discharge gas from flowing rapidly back
through the compressor after shutdown.
NOTE: This check valve cannot be used with recycling pumpdown because it is not entirely
leak-proof.
Summary of Contents for Copeland Scroll YH16K1E
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