10
PIPING
After the chiller has been leveled
properly, the piping for the chilled water
cooling water, and heat medium circuits
may be installed. Piping arrangements
should be made with care so that there is
no interference with service access or
panel removal. Piping should be
adequately
supported
and
braced
independently of the unit so as to avoid
undue
strain
on
the
unit
piping
connections.
Maximum
allowable
pressure in any fluid circuit is 85.3 PSI
(588 kPa)
.
Piping rules and conventions used
with Yazaki chiller are exactly the same
as used with any other type of chiller;
therefore, this installation manual will not
delve deeply into piping design.
Thermo-wells,
pressure
gauges,
Pete’s Plugs, etc. may be installed at the
inlet and/or outlet of each fluid circuit
connection to facilitate startup, future
service,
and
routine
maintenance.
Strainers in each circuit, particularly the
cooling water circuit, are recommended
as well. These should be placed before
the inlet connection of the chiller.
CHILLED WATER PIPING
A balance valve should be installed at
the chilled water outlet and a stop valve
should be installed at the chilled water
inlet. Both valves should be placed in
close proximity to the chiller.
After thoroughly testing for leaks,
insulate the piping circuit, ensuring an
adequate vapor barrier is obtained. Be
sure to allow access to any valves, wells,
and ports that may be present. Also,
ensure the chiller panels are not
restricted by the pipe insulation.
CAUTION
1. DO NOT EXCEED 80
– 120% OF
STANDARD
CHILLED
WATER
FLOW.
2. DO NOT EXCEED 85.3 PSI (588 kPa)
IN THE CHILLED WATER CIRCUIT
AT THE ABSORPTION CHILLER.
3. DO NOT INSTALL ANY VALVES IN
THE EXPANSION LINE.
Figure 8
– Chilled Water Piping
