Pre-connection pipe flushing – Rockwell Automation 20L-LL PowerFlex 700L Liquid-to-Liquid Heat Exchanger User Manual
Page 15
Installation
1-5
PowerFlex 700L Liquid-to-Liquid Heat Exchanger User Manual
Supply Loop Liquid Quality, Maintenance, and Precautions
The supply loop liquid quality is not expected to be as clean as the drive loop
liquid. Clean water will prolong the time needed between cleanings and/or
replacement of the plate heat exchanger. A strainer with screen element is
provided on the input of the supply loop. This screen element is a 20 Mesh,
meaning it has 0.5 mm (0.020 in.) openings. When using a natural or
municipal source of water for the supply loop, sediments could clog the
strainer and openings between the exchanger plates causing the heat transfer
between the drive and supply loop to degrade over time. Scheduled yearly
maintenance to check, clean or replace the strainer element is recommended.
Additional supply liquid filtering may be required if water quality is poor
and supply loop fouling causes drive faults due to overheating. For
instructions to drain the supply loop for maintenance, see
Side Cooling Loop for Periodic Maintenance on page 2-4
Pre-Connection Pipe Flushing
All piping to the drive or supply loop made by the user must be flushed to
remove debris before being connected to the heat exchanger.
!
ATTENTION: The single walled heat exchanger is not
suitable for use in a potable water system. Do not connect the
supply return to a potable water system.