Decommissioning, dismantling, and disposal
Unless otherwise indicated, the following operations can be performed by any correctly trained
maintenance technician.
1. Isolate all sources of electrical supply to the unit, including any control system supplies
switched by the unit. Make sure that all points of isolation are secured in the off position.
2. Disconnect and remove the supply cables. For connection points, see
3. Fill the interior of the unit with N2 gas to pressurize up to 1.5 psig to 3 psig (0.01 MPaG to 0.02
MPaG).
4. Prepare a suitable container. See Table 7, Table 8, Table 9, and Table 10. Drain the remainder of
the solution and refrigerant in the unit from each service valve as completely as possible into a
container. Dispose of them in a suitable and safe manner.
5. Isolate the unit heat exchanger from the external water systems and drain the heat exchanger
section of the system. If no isolation valves are installed it is necessary to drain the complete
system.
6. If glycol was used in the water system, or chemical additives are contained, dispose of the
solution in a suitable and safe manner. Never drain any system containing glycol directly into
domestic waste or natural water systems.
7. After draining, disconnect and remove the water.
8. Remove fixing down bolts, and then lift the unit from position, using the points provided and
equipment with adequate lifting capacity.
See
Handling, storage, installation, and reassembly
for unit installation instructions, and Table 4
and Table 5 for unit weights.
Units that cannot be removed in one piece after disconnection, must be dismantled in position.
Handle each component carefully. Where possible, dismantle units in the reverse order of
installation.
Make sure that while components are being removed, the remaining parts are supported in a safe
manner.
CAUTION
Only use lifting equipment of adequate capacity.
After removing the unit from position, dispose of the unit parts according to local laws and
regulations.
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Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
