Rupture Disk And Relief Piping - Johnson Controls York YHAU-CGN-CXR Series Installation, Commissioning, Operation, And Maintenance

Figure 14: YHAU-CGN-CXR nozzle locations
Item
1 Chilled/hot water outlet
2 Chilled/hot water inlet
3 Cooling water outlet
4 Cooling water inlet

Rupture disk and relief piping

Note: The ANSI/ASHRAE 15-2001 safety standard code was recently revised to include
absorption chiller relief devices. Please read and follow these instructions closely to ensure the
chiller installation is compliant to the revised code.
For YHAU units, this device is a metallic, one time use, rupture disk burst rated at 12.0 psig, +/- 2.0
psig (82.7 kPa, +/- 13.8 kPa). The size of the rupture disc will depend on the chiller capacity.
The rupture disk protects the chiller's integrity if there is ever a tube rupture, or in the very unlikely
event that the unit's refrigerant vapor pressure gets too high. Unlike vapor compression cooling
machines that relieve refrigerant vapor, if the rupture disk bursts, absorption machines could expel
a vapor and a liquid.
30 Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
Description