Advertisement
Fan Coil Unit One-Way Cassette Type
6. Commissioning
ELECTRICAL HAZARD!
Before carrying out any work on the unit, power the unit down to avoid injury from electrical current.
Check that the unit is isolated and ensure that the appropriate point of the unit for the on-site
power supply is secured against being switched back on.
DANGER OF SCALDING!
Before performing work on the valves or the inlet or outlet pipes, seal off the heating or cooling
water inlet to prevent scalding. Do not commence work before the heating medium has cooled
down.
DANGER OF ROTATING UNIT PARTS!
Rotating fan wheels can cause injury! Before performing any work on the unit, ensure that it is
powered down. Ensure that the appropriate point of the unit for the on-site power supply is
secured against being switched back on.
6.1 Requirements for commissioning
After installation, the installers shall re-inspect and confirm the following items have been made.
This manual has been carefully read through. Operators are generally familiar with the unit and can
operate it.
-
The fan coil is electrically isolated.
-
The entire fan coil system has been installed both mechanically and electrically.
-
All water pipes have been rinsed and are free from residues and foreign objects.
-
The system is properly pressurized and then filled with clean water.
-
Check that the fan coil is properly fixed and mounted.
-
Manually check if valves, actuators thermostats are secured according to its operation manual.
-
Tighten all water screw connections.
-
Check all electric connections using current wiring diagrams and check terminal strip screws for
correct tight seat.
NOTE!
Before commissioning, ensure that
-
the unit discharge (heat exchanger),
-
the condensate trays and the condensate pump intake area
-
and the filter medium are clean.
If necessary, these components may have to be cleaned or the filter water changed.
NOTE!
-
For first water filling, the fan coil pipeline may retain some air, which will be finally
entrapped at top of the water system. A manual discharge valve is usually provided at
the water outlet joint of the water system. When abnormal noise is heard due to residual
air in the water system or coil, turn the discharge valve knob to release the air. If the
22
Advertisement
Troubleshooting
