10 48008002-06
COMMISSIONING
Once units are fully installed they must be commissioned to ensure they have been correctly fitted in accordance with
manufacturer’s instructions.
Isolate mains supply before
1. Check that the unit is fitted correctly and all supporting drop rods are secure and lock nuts have been tightened.
2. Ensure that all the unit sections are thoroughly clean and free from any installation debris.
3. Check the coil faces are clean and free from dust; check all the water connections to the coil for leaks.
4. Ensure all air is vented from both coils and the system independently
5. Check the filters to make sure they are clean and free from dust and correctly fitted.
6. Ensure all access panels and blanking plates are securely fixed in position.
7. Check that all actuators are securely fitted to the correct valves.
8. Check electrical work to ensure it complies with BS7671 and that the necessary safety and isolating devises have been
fitted.[refer to wiring diagram supplied with the unit ]
9. Use manual air vents to vent any air trapped in the coil.
Manual Air Vents
Fig. 9
R/H pipe work connections shown
10. Check the condensation drain tray for debris and remove any if found.
11. Pour some water into the drain tray to verify the free flow of water.
12. Units with condensation pumps fitted check the operation of the condensation pump by pouring a small amount of water
into the drain tray and ensure the pump clears any water, and operates any alarms etc.
13. Start the fan and blow-through the system thoroughly.
14. Before operating Electric Air Heaters[if fitted] the air flow through the unit should be established.
15. Check the air volume and external pressure is as specified. Adjust air volume as necessary using speed selector and fine
adjustment switches.
16. Check the motor full load current. Nameplate denotes full load current at speed 6 [NR40]. Nameplate value to be unit max
current value.
17. Check the on/off temperature across the coil and adjust water flow accordingly.
18. Check the function of the controls and [water flow temperatures.]
19. After initial start up and continuous running of the unit it is recommended that the following checks are carried out,
a] Motor full load current.
b] Condition of filter.
c] Condensate and drains for free flow and leaks.
d] Operation of controls.
20. AC motor units, there is a fan speed switch to give three main speeds and a fine adjustment switch for adjusting fan motor
speed.
21. On EC / DC motor units the speed control must not exceed 10.0Vdc and be capable of supporting a 2mAmp Load
AIRSIDE MEASURING AND BALANCING
The most accurate air side measurement for air volume and balancing are obtained by taking readings with an anemometer
traverse across the inlet to the fan coil unit.
Flow connection heating
Return connection heating
Flow connection cooling
Return connection cooling
