connected with the entering water at the bottom and the
leaving water at the top.
Waterboxes with multiple pass arrangements utilize
baffle to separate the passes. These baffles are designed
for a maximum pressure of 137.9 kPad (20 psid). If larger
pressure drops are expected in the application, contact
your local Trane representative to discuss special water-
box options.
Important:
Water flows must be piped in accordance
with nameplate designation.
Field-provided isolation valves for the evaporator and
condenser water lines should be installed upstream and
downstream of the heat exchangers, and be installed far
enough away from the chiller to also provide practical
service isolation for flow sensing devices, field ther-
mometers, flexible connectors, and any removable pipe
spools.
Note:
Assure that the evaporator water piping is clear,
check it after the chilled water pump is operated
but before initial chiller start-up. If any partial
blockages exist, they can be detected and re-
moved to prevent possible tube damage resulting
from evaporator freeze-up or
erosion.
Note:
For condenser and large evaporator connections,
arrange the water piping so that the water supply
enters the shell at the lower connection, and exits
from the top connection. (Operational problems
may result if this is not obeyed) Some shells may
be piped as desired since both connections are at
the same level.
For applications that include an “infinite source” or
“multiple-use”, cooling condenser water supply, install a
valved bypass “leg” (optional) between the supply and
return pipes. This valved bypass allows the operator to
short-circuit water flow through the cooling condenser
when the supply water temperature is too low.
See CTV-PRB006-EN,
Condenser Water Temperature
Control for CenTraVac Centrifugal Chiller Systems -
Engineering Bulletin
, for additional application informa-
tion.
Note:
System refrigerant pressure differential must be
maintained above 3 PSID (21 kPa) at all times.
Failure to do so could result in operating prob-
lems.
Note:
Whenever a CVHE, CVHF, and CVHG unit is
equipped with an auxiliary condenser, use a
bypass valve system to avoid circulating water
through the auxiliary shell during unit shutdown.
Temperature and optimal water flow sensor
changes will also be required.
Water Box Locations
If necessary, the non-marine-style water boxes on each
shell whether evaporator or condenser can be switched
end-for-end to obtain the desired piping arrangement.
Contact Trane Chiller Marketing for switching of ma-
rine-style boxes.
Note:
Do not exchange positions of marine-style water
boxes. Failure to follow this recommendation
could alter designed water flow piping configura-
tion and prevent proper unit operation.
If removal of waterboxes is necessary, refer to the water-
box removal section of this manual.
If the water boxes on any of the shells are exchanged
end-for-end, be sure to reinstall them right side up to
maintain the correct baffle arrangements. Use a new
gasket with each water box cover.
RELEASED 10/Mar/2020 06:59:20 GMT
