Rev. B 06-2019
33
MTEC.6710.GB-B-1 Operation and maintenance manual HMA/Z series English
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with temperature control
5. UNIT START UP
5.1 Preliminary checks
Start-up operations must be performed in accordance with the instructions detailed in the previous paragraphs.
Do not modify internal wiring of the unit as this will immediately invalidate the warranty.
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• The operating voltage the one shown on the unit labels.
• Check that the unit is connected to the system earth.
• Check that there is no refrigerant leakage.
• Check for oil stains, sign of a possible leak.
• Check that the refrigerant circuit shows the correct standing pressure on the pressure gauges (if present) otherwise use external ones.
• Check that the Shrader port caps are the correct type and are tightly closed.
• Check that crankcase heaters are powered correctly (if present).
• Check that all water connections are properly installed and all indications on unit labels are observed.
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• Check that the water temperatures are within the operation limits reported in the manual.
• Before start up check that all panels are replaced in the proper position and locked with fastening screws.
Before starting the unit the checks detailed in this manual of the electric supply and connections, the hydraulic system and the refrigerant
circuit, should be performed.
5.1.1 Before start-up
Damage can occur during shipment or installation. It is recommended that a detailed check is made, before the
installation of the unit, for possible refrigerant leakages caused by breakage of capillaries, pressure switch con-
nections, tampering of the refrigerant pipework, vibration during transport or general abuse suffered by the unit.
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