Thermo King SLXi Spectrum, Руководство по обслуживанию

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Refrigeration Maintenance 10-8
SLX, SLXe, SLXi Spectrum Charging Procedures
The following procedures outline the steps that must be taken to correctly charge Thermo King SLX/ SLXe/SLXi SPECTRUM
units to ensure maximum performance and reliability.
Note: Please take note of your refrigerant type (label on outside of unit), and make sure not to cross-contaminate.
Micro-channel condenser and auxiliary receiver design.
Thermo King introduced micro-channel condenser coils on SLX SPECTRUM units manufactured after
the 14
th
of
November 2011. All SLX/SLXe/SLXi SPECTRUM units equipped with micro-channel condensers are
fitted with
auxiliary receivers alongside the main receiver. The auxiliary receiver is not fitted with a sight glass so the main receiver sight
glass must be used to determine the refrigerant charge level within the system (including the auxiliary receiver). The serial plate
on the unit frame will no longer contain the refrigerant charge information, instead there is a refrigerant charge decal near the
serial number plate, which will need to have the charge entered on completion, please refer to step 11 below.
Unit configuration categories.
As a result of continuous improvement and design changes, Thermo King SLX SPECTRUM units may be categorized as A,
B or C depending on the date of manufacture.
•
Category A
:
SLX SPECTRUM units manufactured prior to the 14
th
of November 2011. These units are equipped with
mechanical throttling valves and fin-tube condensers.
•
Category B:
SLX SPECTRUM units manufactured between the 14
th
of November 2011 and the 30
th
of April 2012.
These units are fitted with mechanical throttling valves and micro-channel condensers.
•
Category C:
SLX SPECTRUM units manufactured after the 30
th
of April 2012. These units are fitted with electronic
throttling
valves and micro-channel condensers.
SLXe/SLXi Spectrum units should all be regarded as Category C.
The exact quantity of refrigerant charge required will depend on the layout of the refrigeration systemconcerned; therefore,
without this procedure it is difficult to pre-determine the correct charge.
Refrigerant charge levels should be checked by running all zones in high speed cool with all separation walls stowed in the
open position.
Charging procedure for SLX SPECTRUM categories.
Prior to charging, it is necessary to make a rough estimate of the charge requirements of the unit. The correct quantity of
refrigerant required for an installation will depend on the type and number of remote evaporators used, and the refrigerant line
route between host unit and remote evaporators.
Each S-2 and S-3 remote evaporator will require an additional 0.75kg and 1kg of refrigerant charge
respectively.
The following table refers to the combined length of refrigeration tube for adding refrigerant. This is for the combined total
for 1 metre of length for the three tubes not for each individual tube. Irrespective of suction line size the calculation is the same.
Example:
1 metre = 0.13kg refrigerant in total for the 3 lines