SECTION 3 - HANDLING, STORAGE, INSTALLATION AND REASSEMBLY
FORM 155.32-ICOM2.EN.UL
ISSUE DATE:1/10/2018
30
JOHNSON CONTROLS
The metallic disk is mounted at the factory between two special flanges. The flanges have
a knife-edge that perforates a special flange on the disk to create an airtight seal.
The outer flange of the disk holder has a plastic pipe stub supplied by the factory for
shipping purposes. The PLASTIC stub must be removed! Refer to
Rupture Disk Discharge Piping Material
ANSI/ASHRAE 15-2001 calls for the relief piping material to be compatible with the
refrigerant in the system. The refrigerant is de-ionized water that could exceed 200°F
(93.3°C) in some cases. Johnson Controls recommends using schedule 40 steel pipe
for the rupture disk discharge line material.
Rupture Disk Discharge Piping Construction
For the piping material, Johnson Controls recommends carbon steel. The relief piping must
be fabricated and constructed in accordance with piping best practices. Follow any local
codes (if applicable) governing the rupture disk discharge relief piping. Due to the high
temperatures of an absorption unit during operation, and the expansion and contraction
associated with this, the rupture disk vent piping must have a flexible connection between
the rupture disk outlet and the relief piping. The installing contractor must supply the
flexible connection and the relief piping.
Piping supports must be spaced according to the pipe material, size and temperature.
Figure 8 -
Plastic Pipe Stub
CAUTION: Liquid coming out of the rupture disk could be in excess of 200°F (93.3°C)!
NOTE: Do not loosen the bolts around the flange or remove the disk from the holder. If
the disk is removed for any reason, it must be replaced with a new one!
NOTE: At no time should there be any weight or moment arm forces imposed on the
flanges of the rupture disk!
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