Pumps options, Chillers optichill, Installation data – Airedale OptiChill FreeCool 500kW - 1365kW User Manual
Page 27
Chillers
OPTICHILL
Chillers
27
Installation & Maintenance : 6564868 02/2013
Installation Data
PUMPS OPTIONS
CAUTION
Full design water flow MUST be maintained at all times. Variable water volume is
NOT recommended and will invalidate warranty.
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 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
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
4
Non Return Valve
2a Pump
5
Electronic Flow Meter
2b Pump & Inverter
6
Microprocessor
3
Liquid Strainer