frost-trol ONEGA R290, Руководство по установке и обслуживанию

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INSTALLATION AND MAINTENANCE MANUAL
TRANSLATION OF THE
ORIGINAL DOCUMENT
For additional copies visit:
www.frost‐trol.com
ONEGA R290 SOLID LINES
Versión: 7 -13-
Difusión Restringida Interna
Using a fork-lift truck or pallet-lift, lift the cabinet, remove the wooden or plastic
supports and replace them with the plastics bases that can be found inside the
cabinet with the other accessories.
Packaging materials (plastic bags, nails, screws, polystyrene, etc.)
should not be left within reach of children as they pose potential
sources of danger.
2.3. LEVELLING
Use the adjustable bases to level the unit. Poor levelling could result in problems
with the defrost-water drainage, which could then freeze and thus cause the unit to
break down.
Poor levelling could result in problems with the drainage of water
resulting from defrosting, which could cause the unit to break down.
IMPORTANT!
The surfaces that the lines are to be placed on may not be perfectly horizontal.
Therefore it would be best to first take the section of line that is to be placed onto
the highest part of the surface and screw its adjustable bases to their smallest
possible heights whilst allowing the section to remain horizontal. This will ensure
that the bases on the end sections do not need to be excessively extended.
2.4. THERMOSTATIC VALVE CONTROL
In order to obtain maximum evaporator efficiency, the expansion valves should be
adjusted to have a reheating value of 3 to 6 degrees.
When viewed from the front, the expansion valve is situated on the far left of the
unit.To ascertain the reheating value measure the evaporation pressure on the
Schrader valve, which is located on the unit. Read the pressure on the pressure
gauge, which also displays the temperature, Te, that corresponds to the
evaporation pressure.
Measure the exact aspiration line temperature using the thermocouple in front of
the thermostatic expansion valve bulb. This will ensure that you obtain the
temperature of the evaporator's exit, Tse. The difference between the two
temperatures is the reheating value, Tr, in the evaporator:
Tse-Te=Tr
To adjust the reheating remove the cap from the thermostatic expansion valve
reheating screw and turn it anti-clockwise to lower the reheating, or clockwise to
increase the reheating.
Turn the screw in no more than quarter turn movements at a time and wait 15
minutes between each adjustment so that the system can stabilize. Once an
adequate reheating value has been obtained, replace the cap on the thermostatic
expansion valve reheating screw and close its lid.