T9901018-1
Page 22 of 26
Vacuum clean and remove any build-up of dust, dirt and debris within the dry cooling unit,
especially on the cooling coil.
Note: Fan motors are permanently lubricated and require no additional lubrication.
If the Dry Cooling Unit has been condensing during the last service interval :-
(e.g. has experienced an emergency situation)
Unclip the condensate pipe at the right hand rear of the dry cooling unit.
The drain tray now angles down along its front edge and the
inside surface of the tray can be easily cleaned. Remove all
debris from the drain tray, outlet spout and condensate hose.
BEWARE
of sharp metal fins on the cooling coil !
Check there are no kinks in condensate hoses. If the
condensate pump is a peristaltic type change the rubber
pump head tube.
If the dry cooling unit has been condensing it is important to find out why this has been
happening and correct the situation. It may be that there has been a failure in the air
conditioning on site or environmental conditions in the server room have gone above
24°C/40%Rh due to some other circumstance, e.g. doors left open, extreme weather
conditions.
Once the dry cooling unit has been cleaned, visually inspect the cooling unit
components. Ensure the two temperature sensors are located correctly on the front face
of the cooling coil (see Section – Commissioning, Page 16). Check all electrical
connections and terminals within the unit are tight and that crimp connections have not
become loose.
Refit the drain tray (if released), bottom access panel and air inlet grilles with air filters.
Switch on the electrical supplies and fully function test the dry cooling unit to ensure
correct operation (see Section – Commissioning, Page 16). Check the condensate
pump operates, if fitted.
Loosen by 3 turns, the rear row of
drain tray fixing screws along the
whole length of the tray. Do not
remove these screws completely.
Remove the front row of drain tray
fixing screws along the whole
length of the drain tray. Keep the
screws.