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Refrigerant Pressure-Relief
Valve Venting
WARNING
Possible refrigerant
asphyxiation!
Relief valve venting must be
vented outdoors. Refrigerant is
heavier than air and will
displace available oxygen to
breathe, causing asphyxiation or
other health risks. Each chiller
or Multiple chillers must have
their own separate relief valves
and vent piping. Consult local
regulations for any special relief-
line requirements. Failure to
vent relief valves outdoors could
result in death and serious
injury.
Note: Vent pipe size must
conform to the ANSI/ASHRAE
Standard 15 for vent pipe sizing.
All country, federal, state, and
local codes take precedence over
any suggestions stated in this
manual.
54
Installation:
Mechanical
All relief valve venting is the
responsibility of the installing
contractor.
All CVGF units use evaporator
and condenser pressure-relief
valves that must be vented to
the outside of the building.
Relief valve connection sizes and
locations are shown in the unit
submittals. Refer to local codes
for relief valve vent line sizing
information.
CAUTION
Do not exceed vent piping code
specifications. Failure to heed
specifications could result in
capacity reduction, unit damage,
and relief valve damage.
After the relief valve has opened,
it will reclose when pressure is
reduced to a safe level.
Note: Relief valves tend to leak if
they have opened and must be
replaced.
Thermal Insulation
All CVGF units are available with
optional factory installed
thermal insulation. If the unit is
not factory insulated, install
insulation over the areas with
designated dotted lines in Figure
13. Refer to Table 14 for types
and quantities of insulation
required. All CVGF units come
from the factory with oil sump
insulation.
Notes: Refrigerant charging
valves, water temperature
sensors, and drain and vent
connections, when insulated,
must remain accessible for
service.
Use only water-base latex paint
on factory applied insulation.
Failure to do so may result in
insulation shrinkage.
Note: Units in environments
with higher humidity may
require additional insulation.
CVGF-SVN02B-E4
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