Pneumatech AD Series, Руководство пользователя

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10
Service Due Indication
“Service Due” indicates the dryer is due for routine
maintenance. Please read the maintenance section or
contact your Pneumatech dealer. In SERVICE DUE
mode, several functions relating to the accumulated run
time can be accessed. The accumulated run time can be
viewed, and the service due threshold (total
accumulated run time before SERVICE DUE indicator
lights) can be viewed and tested.
CAUTION
Drains will not operate normally in Service Due
mode. Drains will not receive power in Service Due
mode unless the DRAIN TEST key is held down.
Never operate the unit in Service Due mode for an
extended period of time.
To enter the SERVICE DUE mode (and view the
accumulated run time) press SELECT, UP (
↑ ) and
DOWN ( ↓ ) keys simultaneously. The display will show
the accumulated run time in tens of hours. If the display
reads 50, for example, the accumulated run time is 500
hours.
1. To display the service due threshold, hit the DOWN
( ↓ ) arrow key. The service due indicator will light up.
2. To test the service due timer function, push the
SELECT and UP ( ↑ ) keys simultaneously. The
accumulated run time will temporarily be set to a
value that is 60 seconds less than the service due
threshold setting. If the service due timer is
functioning properly, the SERVICE DUE indicator
will flash after the 60 seconds has elapsed. After a
few seconds, SERVICE DUE mode will return to
normal operation. The indicator will stop flashing and
the accumulated run time will return to its previous
value.
3. To reset the accumulated run time to zero, hold the
SELECT key for 5 seconds. To exit SERVICE DUE
mode, press the UP (
↑ ) and DOWN ( ↓ ) keys
simultaneously. This can not be done while a service
due timer test is in progress.
SHUTDOWN PROCEDURE
1. Open the bypass valve to allow process flow to
continue downstream. Then close the outlet isolation
valve on the dryer bypass piping.
2. Close the inlet isolation valve on the dryer bypass
piping. At this time the dryer is isolated and can be
depressurized, ready for servicing.
3. Turn the power switch to the OFF position.
NOTE:
The alarm indication light (red) signifies the
refrigerant compressor is not running. The reasons can
be:
• Low suction pressure
• High discharge pressure
• Electrical problems
• Loss of refrigerant
• Dirty condenser
• Leaking evaporator, etc.
Refer to Troubleshooting Guide,
Page 16 , for problem
analysis and remedy. Call the factory if further
assistance is required.
CAUTION
Contact factory before authorizing any warranty
refrigeration service on the air dryer. Identify the
dryer by model and serial numbers when calling
factory.
OPERATING CONDITIONS
Entering Air Temperature
Units are designed for entering air temperature of 100°F
(38°C). If the temperature of entering air is to be greater
than 100°F (38°C), the factory should be consulted to
determine the maximum possible air flow through the
unit.
CAUTION
The increased heat content or higher temperature air
requires the dryer to be oversized to prevent
overloading of the refrigerant compressor.
Entering Air Pressure
Standard units are designed for operating air pressure
100 PSIG (150 PSIG MAX.). Operating below 100 PSIG
will reduce system capacity.
Ambient Air Temperature
The allowable ambient temperature range is 40°F to
110°F (4°C to 43°C). As temperatures approach freezing
conditions, frost or icing may develop in the unit. At
temperatures above 100°F (38°C), refrigeration capacity
will decrease, therefore affecting dew point.