Lennox GAH 020S, Инструкция по установке, эксплуатации и обслуживанию

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Installation manual /
eCOMFORT-MIL150E-0916 / 05/2017
N°
MAINTENANCE PLAN
Monthly + Quarterly Half
Y
early
Task Operating mode
Check water fl ow
Measure the water fl ow rate and compare to the selected initial value
from the order
Inspection and cleanning the water
fi lter
ATTENTION : The water circuit can be under pressure. Follow the
usual precautions when depressurizing the circuit before opening.
Ignoring this rules can lead to accidents and cause injury to the
personal.
Check the watertightness of the unit
and it’s accessories
Verify the gaskets, if cracked or ripped, repair them or replace them.
Check CLIMATIC™ control, set-points
and variables Refer to the commissioning sheet; Check all set points are set ac-
cording to this document.
Check refrigeration system for proper
functioning (Thermal expansion valve)
Retrieve/Check the values of overheating and subcooling. Resume
the expansion valve settings when needed and verify the behavior
in partial loads and at 100%. Resume settings to obtain overheating
between 5K and 10K
Check refrigeration system for proper
functioning (Electronic expansion
valve)
Retrieve/Check the values of the pressure and temperature sensors.
Check also the good behavior of the expansion valve (Open/closed)
in full load and partial load. The overheant must be betweend 5K an
8K.
Check the position and tightness
of refrigeration components
Check systematically all connections and fi xings on the refrigeration
circuit. Check for oil traces, eventually a leak test should be conduct-
ed. Check operating pressures correspond to the ones indicated on
the commissioning sheet.
SIGHT GLASS (when applicable)
The liquid refrigerant fl ow through the sight glass should be steady
and without bubbles. Bubbles are a sign of a low charge, a possible
leak, or of a restriction in the liquid line. Each sight glass is
fi tted
with a humidity indicator. The color of the element changes accord-
ing to the level of humidity in the refrigerant, but also according to
temperature. It should indicate «dry refrigerant. If it shows «wet» or
«CAUTION», contact a quali
fi ed refrigeration technician.
CAUTION: when starting up the unit, run the compressor for at least
2 hours before taking a humidity reading. The humidity detector is
also sensitive to temperature, and as a consequence, the system
must be at normal operating temperature to give a meaningful read-
ing.
Check antifreeze protection Test antifreeze function (leakage rate, frost protection thermostat)
Check refrigeration 3-way valve Check the proper functionning of the system.
Check tightness of all electrical
connections
Power down the unit and check and tighten all screws, terminal and
electric connections (including the terminal boxes)
When turning on the unit, check the deterioration of the electrical
components with a thermal camera, with the unit working at 100% of
it’s power.
Check HP / LP safety switches
Install a pressure gauge HP / LP and check if the safety switches
overall working.