JFD KI40018AA, Руководство по эксплуатации и обслуживанию

Страница: 23 / 110

15
KI-OM-6768 R0 Chapter 2
10. Heater Bank Selection - Determine the temperature rise required through the unit to provide
the correct temperature of fluid at the user. Use the heater selection table, (See Table 3.1),
mounted on the panel door to determine which heater banks should be used to achieve
calculated temperature rise. Switch on the required heater bank switches sequentially. Refer
to trouble shooting if any fault lights illuminate during this operation.
11. Monitor Performance - Monitor the unit inlet and outlet temperature and the differential
temperature rise. The outlet temperature should rise until the set point is reached. As the
outlet temperature approaches the set point the controller begins to govern the process by
activating the automatic dump valve. The process should stabilize and accurately maintain
the temperature differential provided that that the inlet flow and temperature is sustained and
consistent. The inlet water pressure should be a minimum of 3 bar and should be maintained
during dumping of excess hot water.
12. Filter Check - Two water filters are provided to clean inlet water. One for operation and the
other for stand-by. The pressure drop across each filter should be between 0.5 – 1 bar.
Check the pressure drop after running the unit for a 4 to 5 hour settling-in period. The filter
will trap all contaminants introduced into the system during installation and should be
regularly checked after set-up. Replace/rinse the filter elements when the pressure drop rises
above 1.2 bar.
13. Current Drawn - Check input current and voltage to make sure acceptable limits are
maintained.
14. Process Control - When the unit is set-up and operating properly with the correct heater
selection and supplies it will deliver water heated to within ± 1ºC of the controller set point.
Confirm that the unit controls the process as specified.
C
AUTION
SYSTEM FLUSHING
When the system is not in use it should be thoroughly flushed
with fresh water and completely drained according to the
Shutdown Procedure detailed in section 3.4.
I
MPORTANT
When diving in dirty water it may be necessary to pre-filter the water supply to the water
heater to 100 micron, or less to ensure satisfactory performance and manageable filter
element changeovers.