Nortec ME Direct Feed - Manual (Page 19)

19 Operation
4.2 Initial commissioning
The initial commissioning of the Nortec ME Direct Feed requires appropriately trained technical person-
nel. We strongly recommend that your Nortec representative commissions your system.
Inspections
Prior to initial commissioning the complete system must be inspected for correct execution of the instal-
lations. Proceed as follows:
1. Switch off AHU.
2.
Evaporative module installation: Check correct selection of evaporative module on rating plate if
multiple units on site. Check that the evaporative module has been installed level in all planes with
secure blanking plates to prevent air bypass. Check that there is sufficient access for cassette re-
moval during maintenance. Ensure assembly is securely fixed, and that there is no visible damage.
Check that the evaporative module is installed in a waterproof section. Check evaporative module
(including tank) is free of dirt/ debris and clean as necessary.
3. Control unit installation: Check that the control unit is mounted in a convenient dry location
4. Supply water Installation: Ensure the water system in the building has been subject to a Risk As-
sessment. The Nortec ME Direct Feed must be connected to a clean, wholesome mains water
supply. It is the responsibility of the user to ensure that the water system complies with local regula-
tions and bylaws, particularly those for the control of Legionella microbes. The use of mains water
fed tanks and reservoirs is only permitted as part of a managed water treatment system. Check that
the evaporative module has a feed water supply in excess of 2 bar (29 psi) connected to the sup-
plied approved filling hose. Ensure that any hygiene options have been correctly installed. Check
all joints and fittings for leaks.
5. Drain installation: Check that the drain line is made according to the corresponding instructions
given in the installation manual. Ensure the drain line is connected to the main building drain and
that drain pipework is trapped to a suitable level for the applicable working duct pressure. Check all
joints and fittings. Ensure that the drain connection includes an air gap.
6. Distribution pipework: Check all water distribution pipework between the hydraulic manifold and
the distribution headers are securely fitted.
7. Electrical wiring: Check all electrical connections with reference to the corresponding wiring diagram
in this manual. Check that a 100...240V / 10A single phase supply is connected to the control unit.
Ensure that this power supply is isolated with an electrical isolator within 1 m (39") of the control unit.
Note: For systems equipped with a custom control unit please refer to the corresponding manual.
8. Optional controls: Check that appropriate controls connections have been made to the control unit.
Refer to the controls wiring section of the installation manual.
9. Flush water supply and test supply water quality: Disconnect water supply pipe from connector
on the hydraulic manifold. Fix hose to free end of supply pipe and lead hose to a drain. Carefully
flush supply pipe a suitable amount of time without creating splashing or aerosols.
Take a water quality sample to ensure that supply water meets the requirements specified in the
water quality guide. The sample should be tested using a dip slide to indicate the total number of
colony forming units per ml (cfu/ml). Generally, levels of 1x10 3 cfu/ml may be considered acceptable
for this type of humidifier provided the species of microbes and/or fungi involved are themselves not
considered to be harmful. If you are unsure of the quality of your water please consult your Nortec
distributor for advice.
Then reconnect the water supply pipe to the supply connector on the hydraulic manifold.