Operating Instructions and Installation Instructions

EUWA(*)5~24KBZW1
Packaged air-cooled water chillers
4PW61653-1 – 07.2010
Installation and operation manual
10
Pump start up (only for EUWAP and EUWAB)
1 Turn the pump switch to manual. The pump must run now.
2 Set the desired flow by turning the pressure regulating valve.
3 Put the switch to auto. The pump will stop.
4 Switch the chiller on. The pump will be started by the chiller.
Detailed instructions for switching the unit on and operating the
unit, can be found in the chapter "Working with the units" on
page 11.
5 Check if the ∆t of the chiller is within expectations. If necessary,
regulate the flow by using the pressure regulating valve.
Figures pressure characteristics
- Pump characteristics (See figure 4)
- External static pressure (See figure 5)
- Pressure drop curves evaporators (See figure 6)
OPERATION
The units are equipped with a digital controller offering a user-friendly
way to set up, use and maintain the unit.
This part of the manual has a task-oriented, modular structure. Apart
from the first section, which gives a brief description of the controller
itself, each section or subsection deals with a specific task you can
perform with the unit.
Digital controller
User interface
The digital controller consists of a numeric display, four labelled keys
which you can press and LEDs providing extra user information.
Figure - Digital controller
Figure - Remote user interface (optional kit)
NOTE
■ The desired flow is depending on the capacity of the
chiller and the desired temperature difference
between water inlet and outlet (∆t).
■ If manometers are installed, the flow can be
deduced from the pressure difference over the
pump.
For pump and resistance characteristics, refer to
paragraph "Figures pressure characteristics" on
page 10.
1 pump 5, 8 Hp 4 pump 5, 8, 10 Hp (optional)
2 pump 10, 12 Hp 5 pump 12, 16, 20, 24 Hp
(optional)
3 pump 16, 20, 24 Hp
1 EUWAP5, EUWAB5 5 EUWAP16, EUWAB16
2 EUWAP8, EUWAB8 6 EUWAP20, EUWAB20
3 EUWAP10, EUWAB10 7 EUWAP24, EUWAB24
4 EUWAP12, EUWAB12
1 EUWA(*)5 5 EUWA(*)16
2 EUWA(*)8 6 EUWA(*)20
3 EUWA(*)10 7 EUWA(*)24
4 EUWA(*)12
4PW61653-1_digital_EN.book Page 10 Thursday, August 26, 2010 1:49 PM