Carel DLAQ2DF100, User Manual

Page: 38 / 48

38
ENG
"humiFog direct" +0300073EN rel. 1.4 - 29.03.2022
•
Check pump oil level.
To check the level visually, use a mirror that allows a view of side of the
pump facing to the cabinet wall. There is a small mark behind a circular
transparent Plexiglas cover. The oil level is correct if, with the unit off , it
remains around the central circumference. If the level is lower than the
minimum shown in the fi gure, top up with oil (SAE 15W40) to the correct
level (oil P/N 5024646AXX).
Generally the oil level should remain constant and periodical top ups
should not be needed. If oil leaks are found, contact CAREL.
Fig. 13.a
•
Check the nozzles: make sure the spray cone from the nozzles is
regular.
Even when using demineralised water, some particle may at times
build-up on the nozzle opening, making the spray cone less uniform
and aff ecting absorption effi
ciency. If this happens, remove the nozzle
(unscrew using a 10 mm spanner) and clean it (immersing in acetic acid
tom remove scale) or replace it (P/N UAKMTP%000). Before assembling
the nozzle again, remove the residual Tefl on from the thread and the
small white fi lter at the base of the nozzle, and apply the sealant again to
ensure water tightness.
•
Check the fans
Make sure that all of the fans on the blower units are working. In the
event of malfunctions, check the power supply wiring. If the wiring is OK,
replace the fan.
•
Check that there are no water leaks inside cabinet and on the
distribution line and fi ttings.
13.3 Special maintenance
Special maintenance involves all those operations that are performed
on a one-off basis in the event of malfunctions or breakages of certain
components.
The following components are those susceptible to breakage:
•
solenoid valves
•
pressure reducer
•
pressure switches
•
pump motor
•
pump
•
electronic controller
•
fuses
•
nozzles
•
nozzle manifold
•
fans on the blower units
To replace these contact specialist and authorised personnel.
To fi nd the replacement part number, see the paragraph "Cabinet spare
parts"
13.4 Pump maintenance
The pump is the most complex mechanical device inside the cabinet, as
well as the heart of the high pressure system.It therefore requires regular
maintenance, involving the operations described below.
Pump
Check/replace
monthly every 1000 h
check oil level x
check/change oil x
check/replace gaskets and valves x
Tab. 13.a
13.4.1 Oil change
Important: after the fi rst 50 hours of operation, the oil in the pump needs
to be changed (P/N 5024646AXX). Failure to change the oil after the fi rst
50 hours may cause damage to the pump and reduce its working life.
The fi rst oil supplied, in fact, will accumulate debris due to transport and
commissioning, and a longer operating time cannot be guaranteed.
Important: change the pump oil after the fi rst 50 hours of operation.
Important: if there are no leaks or faults, when the "1000 h" check
warning is shown, the oil change may be postponed.
Under normal operating conditions, except for the fi rst oil change
after only 50 hours, we recommend an oil change every 3000 hours of
operation. Every 1000 hours, a notifi cation is generated by the electronic
controller and the 3000 hours of operation are signalled by the electronic
controller through an appropriate "request for oil change and parts
replacement" alarm, which appears on the display.
To change the oil, follow the sequence described below (with the unit off
and the water line closed):
7. Remove the yellow cap on the top of the pump and unscrew the oil
drain plug attraction the bottom (steel hexagonal plug).
8.
Empty the oil into a suitable container. Close the plug.
9. Dispose of the oil in accordance with local standards.
10.
Fill the pump body with SAE 15W40 mineral oil, up to the level
suggested by the circular marker on the side of the pump (the
required oil content is around 350 ml).
11. Finally, close the yellow cap on the top of the pump.
13.4.2 Gasket and valve replacement
The gaskets and valves must be replaced every 3000 hours, duly
indicated by the "request for oil change and parts replacement" alarm
on the display. Nonetheless, in specifi c conditions of stress replacement
may be needed earlier. Carel recommends to check the pump operation
every 1000 operating hours (signalled by notifi cation). If the pump makes
noise, or is not able to reach the required operating pressure (70 bars), the
gaskets and valves may need to be replaced sooner.
Valves and gaskets are consumables, and wear does not refl ect a product
malfunction.
To replace the gaskets, proceed as follows:
1.
Disconnect the wiring from the high pressure switch, solenoid valve
BYP and the NTC probe.
2. Disconnect the pump outlet hose (at the top right).
3.
Unscrew the eight hex screws that hold the pump head to the guard.
4. Remove the gaskets and replace them with new ones (P/N
UAKVGO1501).
5.
Tighten the eight hex screws so as to secure the pump head to the
guard.
6. Connect the outlet hose to the pump.
7.
Reconnect the pressure switch, solenoid valve and NTC probe