Airedale OptiChill FreeCool 500kW - 1365kW - Manual (Page 18)

OPTICHILL
™
Chillers
18
Chillers
Technical Manual : 6530166 V1.6.0 02_2013
Design Features & Information
PUMPS OPTIONS A variety of pump options to suit a wide range of applications is available:
Factory fitted in line as a single pump or run/standby configuration and available in
standard and larger nominal external head pressures.
Factory fitted run/standby pumps have a shut off valve to the inlet and a non return valve
to the outlet, enabling enable one pump to be maintained without interrupting chiller flow.
Supplied with electrical switchgear and isolating valve as standard.
Run/standby pumps may be rotated manually to ensure even pump usage and prolong
component life.
For performance curves, please refer to Performance Data , on page 34.
The pump motor speed can be supplied as fixed or variable:
Standard - ac Motor -
Fixed Speed The standard ac electric motors are 400Vac / 50Hz / 3ph and fixed speed.
Inverter Driven Motor -
Variable Speed for
constant water flow Flow is monitored by the onboard electronic flow meter to maintain the exact requirement
of the application, thus saving pump input power whilst providing optimum chilled water
flow control.
The option of an onboard variable speed drive combined with the electronic flow metering
system offers an exceptional combination of simple commissioning and
optimised efficiency.
Flow Schemes: A Single Head Pump - Standard ac Motor - Fixed Speed
B Run/Standby Pump - Standard ac Motor - Fixed Speed
C Single Head Pump - Inverter Driven Motor - Variable Speed with electronic flow
metering system
D Run/Standby Pump - Inverter Driven Motor - Variable Speed with electronic
flow metering system
1
3
1
1
4
2a
3
1
2a 2b
2b
1
3
1
1
3
1
4
5 5
6
6
4-20 mA
0-10V
4-20 mA
0-10V
A B C D
1 Shut off valve
2a Pump
2b Pump Inverter
3
Liquid Strainer
4 Non Return Valve
5 Electronic Flow Meter
6 Microprocessor