Daikin Navigator WWV - Maintenance Procedures; Pre-Startup Inspection and Procedures; Flow Switch Installation and Calibration

MAINTENANCE
NAVIGATOR WWV/TWVDAIKIN APPLIED
52
Maintenance
NOTICE
Installation and maintenance are to be performed only by qualied
personnel who are familiar with local codes and regulations, and
experienced with this type of equipment.
DANGER
LOCKOUT/TAGOUT all power sources prior to starting,
pressurizing, de-pressuring, or powering down the Chiller. Failure
to follow this warning exactly can result in serious injury or death.
Be sure to read and understand the installation, operation, and
service instructions within this manual.
Pre-Startup
Inspect the chiller to ensure no components became loose or
damaged during shipping or installation including leak test and
wiring check. Complete the pre-start checklist at the front of this
manual and return to Daikin Applied prior to startup date.
NOTICE
Daikin Applied service personnel or factory authorized service
agency must perform initial startup in order to activate warranty.
Return the “WWV Screw Compressor Equipment Warranty
Form” within 10 working days to Daikin Applied as instructed on
the form to obtain full warranty benets.
CAUTION
Most relays and terminals in unit control center are powered
when S1 is closed and control circuit disconnect is on.
Therefore, do not close S1 until ready for startup or unit may
start unintentionally and possibly cause equipment damage.
Before powering the machine and thus starting the compressors,
open all valves that were closed at the factory for shipping. The
valves to be opened are:
1. Valve (optional) installed on the compressor line
2. Oil return pipe shuto󰀨 valves (jet pump). These valves are
positioned below the evaporator sleeve in the vicinity of the
jet pump.
3. Liquid line valve installed under the condenser.
4. Oil valves installed on the line that feeds the compressor
lubrication system. This line comes from the bottom of the
oil separator located inside the condenser.
5. Valve (optional) installed on the compressor pump line.
Flow Switch Installation and
Calibration
A thermal dispersion ow switch uses heat to determine ow and
therefore must be calibrated during system startup. A thermal
dispersion ow switch can be an acceptable replacement for
paddle type ow switches and di󰀨erential pressure switches, but
care must be taken regarding wiring.
The thermal dispersion ow switch supplied by Daikin Applied,
shown in Figure 1, comes as a two part unit consisting of a ow
switch and an adapter labeled E40242 by the supplier.
Figure 31: Thermal Dispersion Flow Switch and Adapter
NOTICE
Flow switch MUST be calibrated before chiller operation. Failure to properly
calibrate the switch may result in severe chiller damage and/or void warranty.
Mounting
Figure 32 highlights the position of the electrical connector and
indentation ‘mark’ on ow switch.
Figure 32: Flow Switch Details
No. Descriptions
1 Electrical Connector
2 Indentation