Cooling Water Piping; Heat Medium Piping - Yazaki AROACE Installation Instructions Manual

COOLING WATER PIPING

If possible, the cooling tower should
be installed at the same level or above
the level of the chiller.
possible, give careful consideration to the
prevention of drain-back and loss of
cooling water due to overflow of the
tower. Such matters must be given prior
consideration by the design engineer.
As with the chilled water connections,
a balance valve should be installed on
the cooling water inlet and a stop valve
installed on the cooling water outlet.
Both valves should be 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 insulation.

HEAT MEDIUM PIPING

The Heat Medium Piping contains the
hot water to drive the absorption system.
As long as this water remains between
158-203°F
(70-95°C)
can be liberated in a usable quantity. If a
mixing valve is to be used to control this
temperature, IT
COMBINED WITH THE HEAT MEDIUM
BYPASS VALVE.
separate and distinct control.
If this is not
Figure 9 – Cooling Water Piping
, refrigerant vapor
MUST NOT BE
It MUST be a
Additionally, there should be flush and
drain valves
machine and the balance/stop valves so
as to allow for flushing of the absorber-
condenser coils should it ever become
necessary.
CAUTION
1. DO NOT EXCEED 100 – 120% OF
STANDARD
FLOW.
2. DO NOT EXCEED 85.3 PSI (588 kPa)
IN THE COOLING WATER CIRCUITS
AT THE ABSORPTION CHILLER.
3. DO NOT INSTALL ANY VALVES IN
EXPANSION LINES, WHEN USED.
The key device required for the proper
operation of the unit is a Heat Medium
Bypass Valve. When the unit requires
heat medium, it will send a signal to this
valve to open. When the unit does not
require heat
reason, this valve will be commanded to
move into bypass position.
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installed between
COOLING WATER
medium, for whatever
the