29
M
INI
-S
PACE
EC I
NSTALLATION
, O
PERATION
AND
M
AINTENANCE
M
ANUAL
4.3.4.2
Standard Clean out Procedure
NOTE
Cleaning operations must be performed by a
journeyman refrigeration mechanic or air conditioning
technician.
1. Turn off power to unit at the main power disconnect
switch.
2. Remove the old compressor and install the new com-
pressor.
3. Remove the liquid line drier and install an oversized
liquid line fi lter-drier (one size larger than the normal
selection size).
4. Evacuate the system according to standard procedures.
Normally, this will include the use of a high-vacuum
pump and a low-vacuum micron gauge for measuring
the vacuum obtained.
5. Recharge
the
system.
6. Turn on the power at the main power disconnect switch
and start the system at the controller.
4.3.4.3
Burn-Out/Acid Cleanup Procedure
The unit should be cleaned using the suction line fi lter-drier
method.
CAUTION
Avoid touching or contacting the gas and oil with
exposed skin. Severe burns will result. Use long
rubber gloves in handling contaminated parts.
NOTE
Cleaning operations must be performed by a
journeyman refrigeration mechanic or air conditioning
technician.
1. Turn off power to the unit at the main power disconnect
switch.
2. Remove the burned out compressor and install the new
compressor.
3. Install a suction line fi lter-drier designed for acid removal.
4. Remove the liquid line drier and install an oversized liquid
line fi lter-drier (one size larger than the normal size for
the unit).
5. Check the expansion valve, sight glass and other controls
to see if cleaning or replacement is required.
6. Evacuate the system according to standard procedures.
Normally, this will include the use of a high-vacuum
pump and a low-vacuum micron gauge for measuring
the vacuum obtained.
7. Recharge the system through the access valve on the
suction line fi lter-drier.
8. Turn on power at the main power disconnect switch and
start the system at the controller.
9. The permanently installed suction line fi lter-drier permits
small system cleanup to be completed in one service
call. The pressure drop across the suction line fi lter-drier
should be measured during the fi rst hour of operation. If
the pressure drop becomes excessive, the suction line
fi lter-drier should be replaced (See Sporlan Bulletin 40-
10, for the maximum recommended pressure drop (PSI)
for the suction line fi lter drier).
10. In 24 hours, take an oil sample. Observe the color and
test for acidity. If the oil is dirty or acidic, replace the suc-
tion line fi lter-drier.
11. In 2 weeks, examine oil to determine if another suction
line fi lter-drier change is necessary.
4.3.4.4
Humidifi er Cylinder Replacement
The cylinder is disposable and cylinder life is dependent
on water supply conditions and humidifi er usage. After an
extended period of operation a yellow LED on the humidifi er
cabinet will fl ash in a four-fl ash sequence to indicate the
cylinder is completely used and a replacement cylinder must
be installed. The following procedures should be followed
when replacing the cylinder.
CAUTION
Failure to replace cylinder at the end of cylinder life
may result in humidifi er damage.
NOTE
Decrease the low humidity setpoint below ambient
humidity to allow the cylinder to cool down before
removing the cylinder.
1. Turn the unit off, preferably in a manner that uses the
controller, such as via the graphic controller, BMS or
external shutdown control.
2. Drain the cylinder by switching the “On/Off/Drain” switch
to the “Drain” position. Let the humidifi er drain until no
more water is fl owing out to drain (usually not more than
10 minutes).
3. Turn
the
humidifi er On/Off/Drain switch to off.
4. Turn off water supply to the humidifi er.
5. Exit the cabinet and disconnect power to the humidifi er
at the main power disconnect switch.
