Sullair RD Series, User & Service Manual

Page: 13 / 268

SECTION 2 RH SERIES—HIGH TEMPERATURE
13
2.4.6 M
AINTENANCE BY AN
E
NGINEER
/
T
ECHNICIAN
1. Maintenance and repairs should only be
performed when the air dryer is shut down
and depressurized and when the main
power switch is turned OFF.
2. Use only the appropriate tools for mainte-
nance and repair.
3. Before dismantling any part that has been
pressurized, disconnect the pressure
sources and depressurize the system com-
pletely. Shut off all valves and isolate the
dryer.
4. Proceed carefully during maintenance and
repair. Prevent dirt from entering by covering
parts and orifices with a clean cloth, paper or
tape.
5. Receiver tanks should never be welded or
modified in any way.
6. Never leave tools, loose parts or cleaning
rags in or on the air dryer.
7. Before connecting the dryer back online,
check the setting of the control and safety
devices as well as the pressure and the tem-
perature of the compressed air circuit.
2.4.7 M
AINTENANCE BY THE USER
1. Keep the dryer clean.
2. In case of more than 4 pounds of refriger-
ant, the dryer should be regularly checked
to be leak free by qualified refrigerant
engineer. Refer to section “Environmental
protection” of this manual.
3. Every six months — check the correct
operation of the condenser drain trap.
Replace timer or solenoid valve in case of
clogging or malfunctioning.
4. Every six months —check and clean the
drain strainer or the electronic sensor by
undoing the access screw and rinsing the
filter with tap water to remove the trapped
dirt from the inside.
5. Clean the air condenser with a brush or
compressed air as soon as it’s dirty or
clogged: Take care not to bend the fins of
the condenser heat exchanger.
6. Check the troubleshooting list in case of
maintenance issues.
7. Check operating pressures, temperatures
and time settings after maintenance. If oper-
ating and safety devices function properly,
the air dryer may be used.
2.4.8 E
NVIRONMENTAL
P
ROTECTION
1. US/EU laws protect the environment against
refrigerant being released into the atmo-
sphere.
2. An annual leak control test at less than 5.0
gr/year should be performed by a qualified
engineer if the refrigerant dryer contains
more than 4.4 lbs/ 2 kg of refrigerant. This
control test has to be done twice a year if the
dryer contains more than 66 lbs/30 kg.
3. Prior to dryer disposal, the refrigerant must
be properly recovered by a qualified engi-
neer.