Commissioning
HDK-CNG_EN_03_2016
33
Checks before start-up
Purge system before start-up!
The dryer was subjected at the plant to a leak test using compressed air
and is supplied with a positive pressure of +0.5 bar.
Prior to commissioning, the dryer must be purged using a suitable
medium to remove any residual humidity or oxigen!
Warning!
Interrupt the start-up procedure if the controller displays an error
message. All displayed faults must be rectified prior to start-up.
Ensure that
all pipe, cable and bolt connections on the dryer have been retightened,
no pipes chafe against body edges,
All earthing connections have been made correctly
all connections on the dryer are sealed.
all mountings are perfectly secure,
the electrical connections are in safe contact and in good condition,
owner-end and pressurised parts such as safety valves or other devices are
not blocked up by dirt or paint,
all natural gas system components which are pressurised (valves, hoses etc.)
are free from wear symptoms and defects.
Note:
Run the dryer at least for 24 hours after commissioning so that the
dewpoint sensor displays a precise dewpoint.
Setting times of the operating phases
In its standard version the dryer is delivered with a time-dependent control
system. The phase sequence occurs in a fixed cycle.
With the optional
dewpoint-sensing control
the dryer can also be operated at
variable cycles (depending on the dewpoint).
The following table provides information on the duration of the individual phases.
Phase duration
Fixed cycle
Short cycle
Variable cycle
Fix
Adsorption
60
min
~ 20
min
120
min, max 35 min
Regeneration, total
60
min
~ 20
min
60
min
35 min
of which: expansion time
~ 3
min
~ 1
min
5 min
of which heating
~ 50
min
~ 15
min
~ 50
min
20 min
of which cooling
~ 5
min
~ 7
min
7 min
of which: pressure build-up ~ 2
min
~ 2
min
2:30 min
Standby
—
~ 60
min, max
