Daikin EWWD370H-XS, Installation, Operation And Maintenance Manual

Page: 14 / 192

D-EIMWC00308-16EU - 14/192
Open the isolation valves and / or interception
Before compressor start up, be sure that all isolating valves
are fully open and back seated and the valve spindle tightly
capped.
ATTENTION
Before starting the compressors, it is imperative that the
discharge shut-off valve after the oil separators is fully
open and back-seated, and the valve spindle tightly
capped.
The taps are open:
1. Isolation valves installed above the oil separators. These
valves must be opened up to the stop and the safety caps
repositioned.
2. Shut-off valves of the oil return pipe (jet pump). These
valves are located below the evaporator shell near the jet
pump.
3. Shut-off valves of balancing the oil lines. These valves are
installed on the vessel of the oil separators.
4. Tap of the liquid line installed in the condenser.
5. Taps installed on the oil line that feeds the compressor
lubrication system. This line comes from the bottom of the
oil separator.
6. Intake valves installed, optionally, in the vicinity of the
compressor intake above the evaporator.
ATTENTION
Before filling the water circuit, please close the water
valves, on the heads of the heat exchangers.
Routine maintenance
Minimum maintenance activities are listed in
Table 1.
Service and limited warranty
WARRANTY IS VOID IN CASE OF MISSING OF THE
MAINTENANCE ROUTINE.
These units have been developed and constructed according
to high quality standards ensuring years of failure-free
operation. It is important, however, to ensure proper and
periodical maintenance in accordance with all the procedures
listed in this manual and with good practice of machines
maintenance.
We strongly advise stipulating a maintenance contract with a
service authorized by the manufacturer in order to ensure
efficient and problem-free service, thanks to the expertise and
experience of our personnel.
It must also be taken into consideration that the unit requires
maintenance also during the warranty period as per below
Table 1.
It must be borne in mind that operating the unit in an
inappropriate manner, beyond its operating limits or not
performing proper maintenance according to this manual can
void the warranty.
Observe the following points in particular, in order to conform
to warranty limits:
1.
The unit cannot function beyond the specified limits
2. The electrical power supply must be within the voltage
limits and without voltage harmonics or sudden changes.
3. The three-phase power supply must not have an
unbalance between phases exceeding 3%. The unit must
stay turned off until the electrical problem has been
solved.
4. No safety device, either mechanical, electrical or
electronic must be disabled or overridden.
5. The water used for filling the water circuit must be clean
and suitably treated. A mechanical filter must be installed
at the point closest to the evaporator and condenser inlet.
6. Unless there is a specific agreement at the time of
ordering, the evaporator water flow rate must never be
above 120% and below 80% of the nominal flow rate.
Periodic obligatory checks and starting up of
appliances under pressure
The units are included in category IV of the classification
established by the European Directive PED 2014/68/EU.
For chillers belonging to this category, some local regulations
require a periodic inspection by an authorized agency. Please
check with your local requirements.
Table 1 - Routine maintenance programme
List of Activities Monthly Quarterly
Semi-
annually
Annually
As
requested
by
performance
I. Compressor
A. Performance Evaluation (Log & Analysis) * O
B. Motor

Meg. Windings X

Ampere Balance (within 10%)
X

Terminal Check (tight connections, porcelain clean)
X
C. Lubrication System

Oil Lines Temperatures
O

Oil Analysis X

Oil Appearance (clear color, quantity)
O

Oil Filter Change X

Oil change if indicated by oil analysis
X
D. Unloading Operation

Compressor Loads:
Record Motor Amps X

Compressor Unloads:
Record Motor Amps X
E. Internal Compressor Check X
II. Controls
A. Operating Controls

Check Settings and Operation X

Check Unloading Setting and Operation
X

Verify Load Balance Operation X
B. Protective Controls

Test Operation of:
Alarm Relay X
Pump Interlocks X