well as the routing and size of corresponding
pressure-relief piping. The routing and size of new
pressure-relief piping will be per ASHRAE 15.
**************************************************************************
The assembly shall be a combination pressure relief valve and rupture disc
designed for refrigerant usage. The assembly shall be in accordance with
ASME BPVC SEC VIII D1 and ASHRAE 15. The assembly shall be provided with a
pressure gauge assembly which will provide local indication if a rupture
disc is broken. Rupture disc shall be the non-fragmenting type.
2.8.3
Refrigerant Signs
Refrigerant signs shall be a medium-weight aluminum type with a baked
enamel finish. Signs shall be suitable for indoor or outdoor service.
Signs shall have a white background with red letters not less than 13 mm
0.5 inches in height.
2.8.3.1
Installation Identification
Each new refrigerating system shall be provided with a refrigerant sign
which indicates the following as a minimum:
a.
Contractor's name.
b.
Refrigerant number and amount of refrigerant.
c.
The lubricant identity and amount.
d.
Field test pressure applied.
2.8.3.2
Controls and Piping Identification
Refrigerant systems containing more than 50 kg 110 lb of refrigerant shall
be provided with refrigerant signs which designate the following as a
minimum:
a.
Valves or switches for controlling the refrigerant flow [, the
ventilation system,] and the refrigerant compressor(s).
b.
Pressure limiting device(s).
2.8.4
Refrigerant Recovery/Recycle System
**************************************************************************
NOTE: A refrigerant recovery/recycle system will
not be specified if the designer determines that on
site staff will not be responsible for chiller
teardown or major service. If the designer
determines the on site staff will be responsible for
chiller teardown or major service, the designer
shall investigate whether another recovery/recycle
system is available to maintenance personnel before
specifying a new system. The recovery/recycle
system is an expensive item and all alternatives to
providing a new system should be investigated.
If a refrigerant recovery/recycle system is
specified, the recovery/recycle system shall be
SECTION 15620A
Page 43
Previous Page
