Air Handlers Envirofresh Series Handleiding voor installatie, bediening en onderhoud - Pagina 13
Blader online of download pdf Handleiding voor installatie, bediening en onderhoud voor {categorie_naam} Air Handlers Envirofresh Series. Air Handlers Envirofresh Series 19 pagina's. Air handling units
Pagina afdrukkenRefrigeration Maintenance
SAFETY
ACCESS
SERVICE CHECKS
4 MONTHLY
REFRIGERATION
CIRCUITS
ELECTRICAL
SERVICE CHECKS
YEARLY
WARNING: Ensure that all power to the unit is switched off before carrying
out any servicing or maintenance task.
Only trained and qualified service personnel should repair or service air
conditioning equipment containing a refrigeration system.
Follow all safety codes. Wear safety glasses and work gloves.
Extinguish any cigarette or naked flame.
If on inspection of the refrigeration pressures a refrigerant leak is suspected,
open all access panels to ensure the gas has dissipated to atmosphere.
The access panel to the refrigeration service valves and switches is
identified by a red flammability label. Access to the compressor section is
identified on the unit drawing.
At every service visit the following checks should be carried out: -
Check the suction and discharge pressures using a service gauge
manifold and compare them with the commissioning sheet. If there is any
significant variation, then the fault should be found and corrected. Refer to
the troubleshooting chart. If on inspection of the refrigeration pressures a
refrigerant leak is suspected, open all access panels to ensure the gas has
dissipated to atmosphere.
Visually examine pipework and components for damage, wear and tear and
oil patches, the latter being indicative of a system leak.
Check that the high and low pressure switches are cutting out the
compressors at the correct settings.
High pressure switch cut-out
Low pressure switch cut-out
Low pressure switch cut-in
The gauges can then be removed from the system. Do not forget to replace
the security caps on the Schrader valves.
Check all electrical connections for signs of overheating or arcing.
Check all cables for signs of chafing or physical damage.
As four monthly plus the following: -
Check all electrical connections for tightness.
Check all refrigeration connections with a foam or detergent leak detector.
320psi
30psi
50psi