Daikin Trailblazer AGZ030E-070E, Инструкция по установке, эксплуатации и обслуживанию

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IOM 1207-6 • TRAILBLAZER
®
MODEL AGZ CHILLERS 128 www.DaikinApplied.com
Startup and Shutdown Procedures - Pumps
Startup and Shutdown Procedures - Pumps
Pre-Startup
Follow the chiller startup procedure beginning on page 123
and complete the pre-start checklist for scroll compressor
chillers found in the front of this manual as well as the pump
commissioning startup form.
Other operational guidelines are as follows:
• Check rotation of the pump by bumping its power. It
should be clockwise when viewed from the top of the
motor looking down at the fan rotation.
• Do not run the pump without fluid in the system. Fluid is
required to cool and lubricate the pump.
• Before starting pump(s) and with water in the pump,
purge the seal flush line by cracking the vent valve until
water appears. The valve will protrude from the pump
insulation. The seal is the highest point in the pump and
requires water for sealing and lubrication.
Figure 103: Location of Vent Valve
• VFD equipped pumps are shipped with the pump
VFD controller in the AUTO mode. Confirm this by
checking the VFD controller and pressing the Auto key if
necessary. The AUTO ON button is located at the bottom
of the controller.
• Check that the “Y” strainer valve is open (horizontal
position) and the triple-duty valve is open.
In addition to making any settings required, it is often desirable
to run the pumps without the chiller running to check the chilled
water circuit. De-energize the compressors by turning off
the three switches located in the unit left-hand control panel
(SW1, PS1 and PS2). Energize the unit by closing the main
disconnect located in the right-hand panel door. Non-VFD
pumps can then be operated using the switch located on the
door of the pump control panel. Use the display keypad on
VFD unit for operation. Press the Hand on key and use the
▲ or ▼ key to regulate the pump speed and flow. The VFD
should be changed to the Auto mode for normal operation.
Setting the Operating Mode
For convenience, the operating parameters for each of the
three operating modes have pre-programmed setups.
Setup #1 Sensorless
The pump control is factory set for this mode and no field
changes or programming is required.
NOTE: Sensorless operation is only allowed for single chiller
systems. Systems with parallel chiller operation must
use one of the other control methods.
Setup #2 External Sensor
Normally a differential pressure sensor.
Setup #3 BAS
See BAS Integration of Pumps on page 119.
Hand On
Manual operation - not programmed.
Change from the sensorless default setup #1 to setup #2 or #3
on the graphic keypad display as follows.
1. Press the OFF key. The keypad display will remain
powered.
2. Press the MAIN MENU key. Should show parameter “0-
** Operations/Display”.
3. Press OK.
4.
Press ▼ key to 0-1 “Set UP Operations”.
5. Press “OK”. Display goes to 0-10 “Active Setup”
6. Press “OK”. Display will show boxed #1, #2, or #3
7.
Press ▼ or ▲ key to select either mode #2 or #3. #1 is
factory default.
8. Press OK. The upper right-hand corner of the display
should show 2(2) or 3(3) depending on the choice.
9. Press AUTO for normal operation.
10. Press STATUS to return to the normal operating screen.
Startup
Occasionally the impeller may be temporarily bound up and will
not turn at start up. If this is the case, loosen the insulation and
loosen the hold-down bolts holding the motor assembly to the
pump casing (do not remove them) and bump the pump.
The pump package is shipped with three strainers:
• A “Y” type strainer at the unit inlet connection
• A perforated strainer located in the inlet guide assembly
at the inlet of the pump.
• A fine mesh temporary start-up strainer located in the
inlet guide.
The “Y” strainer has a finer mesh than the inlet guide strainer
and should catch most debris before it reaches the inlet guide
strainer which also functions as suction flow direction device.
No special attention need be paid to the Suction Guide strainer
at initial start-up. It will strain the pumped fluid and stabilize the
flow into the pump suction automatically.