Trane Flex II Series Installation Operation & Maintenance page 28

WATER CIRCUIT
THE FILTER IS INSTALLED ON THE HEAT EXCHANGER INLET PIPES,AT A MAXIMUM DISTANCE OF 2 METERS
FROM THE UNIT.
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PLEASE NOTE THAT THE FILTER INSTALLATION IS MANDATORY. FOR FURTHER TECHNICAL INFORMATION
RELATING THE FILTER PLEASE REFER TO THE TECHNICAL DOCUMENTATIONS.
THE FLOW SWITCH HAS BEEN INSTALLED AND ELECTRICALLY CONNECTED. PLEASE NOTE THAT FLOW SWITCH
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INSTALLATION IS MANDATORY.
THE VALVES ON THE WATER PLANT MUST BE OPENED. PLEASE BE AWARE THAT IF THE MACHINE IS POWERED
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(OR IN STAND-BY MODE) PUMPS WILL START IF THE WATER TEMPERATURE IS EQUAL OR BELOW 4°C. CLOSING
THE VALVES MAY THEREFORE CAUSE SEVERE DAMAGES.
DRAINAGE VALVES ARE INSTALLED. THE DRAINAGE VALVES ARE INSTALLED ON THE LOWEST POINT. THE
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UTILIZATION OF AUTOMATIC DRAINAGE VALVES IS RECOMMENDED.
AUTOMATIC OR MANUAL PURGE VALVES ARE INSTALLED.
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AUTOMATIC OR MANUAL PURGE VALVES ARE INSTALLED ON THE HIGHEST POINT.
THE HYDRAULIC CIRCUIT HAS BEEN FILLED AND PURGED.
THE PLANT SHALL BE PURGED SEVERAL TIMES BEFORE STARTING UP THE UNIT. THE FILTER INSTALLED NEXT
TO THE HEAT EXCHANGER SHALL BE CLEANED SEVERAL TIMES BEFORE STARTING UP THE UNIT, UNTIL THE
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CORRECT DELTA T IS ASSURED AND THE HYDRAULIC PRESSURE IS CONFORM TO THE PLANT AND TO THE
WATER PRESSURE DROPS.
FOR FURTHER TECHICAL INFORMATIONS PLEASE REFER TO TRANE DOCUMENTATIONS AND PROCEDURE FOR
THE FIRST START UP.
HYDRAULIC CONNECTIONS TO THE UNIT ARE COMPLIANT WITH THE UNIT NAME PLATE AND DIMENSIONAL
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DRAWINGS (HOT WATER INLET, HOT WATER OUTLET, COLD WATER INLET, COLD WATER OUTLET, EXT.).
RUBBER JOINTS ARE INSTALLED ON THE HYDRAULIC CONNECTIONS, IN ORDER TO MINIMIZE VIBRATIONS
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BETWEEN THE UNIT AND WATER PIPES.
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SHUTOFF VALVES ARE INSTALLED ON THE HYDRAULIC CIRCUIT.
THE EXPANSION TANK IS INSTALLED ON THE HYDRAULIC CIRCUIT. EXPANSION TANK CAPACITY CONCURS
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WITH THE WATER PLANT CAPACITY.
TEMPERATURE PROBES AND PRESSURE GAUGES ARE INSTALLED ON THE HYDRAULIC CIRCUIT, BOTH INLET
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AND OUTLET SIDE.
THE HYDRAULIC CIRCUIT IS FREE FROM OBSTRUCTION OR ANY KIND OF CONSTRAINT.
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BUFFER TANKS ARE INSTALLED IN THE HYDRAULIC CIRCUIT. THE BUFFER TANKS INSTALLATION IS STRONGLY
RECOMMENDED IN ORDER TO WARRANTY THE OPTIMAL UNIT OPERATION.
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SPECIFY BUFFER TANK CAPACITY:LT
THE PRESSURE RELIEF VALVE IS INSTALLED BETWEEN DELIVERY AND RETURN PIPES.
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WARNING: IN ORDER TO AVOID WATER-HAMMER, THE RELIEF VALVE PRESSURE SHALL BE SET UP IN
ACCORDANCE WITH THE STANDARD OPERATING PRESSURE OF THE WATER CIRCUIT.
THE AUXILIARY HEATING SYSTEM IS INSTALLED IN THE WATER CIRCUIT IN ORDER TO AVOID THE START-UP
OF THE UNIT WITH WATER TEMPERATURE BELOW 18°C. BEFORE STARTING UP THE UNIT THE INLET WATER
TEMPERATURE MUST BE EQUAL OR HIGHER THAN 18°C.
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WARNING: THE UNIT SHALL NEVER WORK (NOT EVEN FOR SHORT PERIODS) WITH AN INLET WATER
TEMPERATURE LOWER THAN 18°C.
ANTIFREEZE PROTECTIONS ARE INSTALLED IN THE WATER CIRCUIT (ELECTRICAL HEATERS ARE INSTALLED ON
42 WATER PIPES AND TANKS).
COMPLIANCE
YES NO
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