Quantech QTC40160, Установка, эксплуатация и обслуживание

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Quantech
159
Form QTC4-NM2
Issue date: 05/12/2023
9
General requirements
The units have been designed to operate continuously,
provided they are regularly maintained and operated
within the limitations given in this manual. Include
each unit in a routine schedule of daily maintenance
checks by the operator or the customer, backed up by
regular service inspection and maintenance visits by a
suitably qualified service engineer.
It is entirely the responsibility of the owner to provide
for these regular maintenance requirements and to en-
ter into a maintenance agreement with a Quantech ser-
vice organization to protect the operation of the unit.
If damage or a system failure occurs due to incorrect
maintenance during the warranty period, Quantech is
not liable for costs incurred to return the unit to satis-
factory condition.
This Maintenance section applies to the
basic unit only and may, on individual
contracts, be supplemented by additional
requirements to cover any modifications
or ancillary equipment as applicable.
Read the safety section of this manual
carefully before attempting any mainte-
nance operations on the unit.
Weekly maintenance
The operator or customer must conduct the following
maintenance checks on a weekly basis. Note that the
units are not generally user serviceable so do no at-
tempt to rectify faults or problems found during daily
checks unless competent and equipped to do so. If in
any doubt, contact your local Quantech service agent.
Unit status
Press the STATUS key on the keypad and ensure that
no fault messages are displayed.
Section 9 - Maintenance
Operating conditions
Read the operating pressures and temperatures at the
control panel using the display keys and check that
these are within the operating limitations given in the
manual.
Compressor oil level
Compressor oil level runs below the bottom of the sight
glass. Oil levels will only be visible in the sight glass
after running for periods of 15 min to 30 min at full
compressor speed. Do not run with oil levels above the
sight glass. Be careful when viewing the sight glass not
to confuse a full sight glass with an empty sight glass.
Refrigerant charge
Ensure that there is a level of refrigerant in the evapo-
rator sight glass while running at full load for 15 min
to 30 min.
Adding charge to a system
A sight glass is located in the evaporator. When opti-
mally charged after running full load, the refrigerant
level is in the center of the sight glass, approximately.
If the level is high or low in the glass, it does not affect
operation.
It is not necessary to weigh charge unless
the entire charge has been lost. The ease
of charging is possible since the micro-
channel coils hold only a small amount
of refrigerant charge. Add charge as liq -
uid while circulating water through the
evaporator. If the complete charge needs
to be added, see Checking the system for
leaks on page 160 in this section. Use
the valve on the liquid line for adding
the full charge and open the valves per
the procedure.