13 48008002-06
COILS
The coil shall be inspected every three months to ascertain if any solids or foreign matter have accumulated between the fins and
that the coil connections are free from leaks. Should any matter be found, the coils shall be cleaned by using a soft brush and a
mild solution of detergent. Great care to be taken not to damage the fins. Should the fins become contaminated too frequently it is
advisable to check the air filter to ensure it is correctly fitted and functioning correctly. Coils are fitted with manual air vents to be
used for venting air from the coils.
To remove the coil and condense tray assembly from the unit the following procedure must be adopted:-
1. Isolate the electrical supply
2. Isolate flow and return pipe work to both heating and cooling connections
3. Drain down both heating and cooling coils. Then remove flow and return pipe work to valves and disconnect the condense
pipe from the drain tray..
4. Disconnect valve actuator control leads.
5. Support weight of condensate tray and remove four-off M6 screws holding tray to unit.
6. Support coil and remove 8- M5 bolts. Slide the coil down out of the unit.
CAUTION
– The fins on coils are easily damaged and can have sharp edges so protective gloves should be warn,
care should be taken when removing.
7. To re-install follow reverse procedure remembering to vent coil when re-filling with water.
8. Ensure all seals are intact and fixing screws are secure.
9. Check all water connections for leaks.
FILTERS
Filters must be properly maintained in order to ensure proper air cleaning efficiency. Dirty filters will reduce the air volume handled
by the unit, thus adversely affecting its performance. The length of time between cleaning of filters is dependant upon the
environment. A six to twelve month cycle is normal, more frequent servicing may be required in some cases.
Filters on Sapphire series-units are held in place by an inbuilt channel top and bottom.
To remove the filter:
Place fingers in material loops and gently pull out.
Filters on units with out return air plenums shall be removable from the open inlet, and via a bottom access panel on units with
return air plenums. [see fig. 12]
Material Loops used to remove Filters
Fig. 12
Optional pad in frame washable air filter pads
.
These can be cleaned by gently tapping and removing loose dust with a compressed air-line or vacuum cleaner. Having removed
the pad from the frame, fully immerse in warm water to which a mild detergent has been added. Agitate the water until all
contaminants have been removed. Rinse in clear water, and then allow to drain and dry before replacing pad into the filter frame.
INSULATION
The insulation must be checked annually for condition and to make sure it is still firmly fixed in position, if a piece of insulation
becomes loose it could restrict the air flow through the unit.
If insulation shows signs of deterioration it must be replaced, if peeling off then it must be
made secure.
To replace the insulation the following procedure must be adopted:-
1. Isolate the electrical supply.
2. Peel off affected insulation pad from casing and discard.
3. Remove old securing tape and residue foam.
4. Clean the area thoroughly before securing insulation in place with new adhesive tape.
5. Press new insulation pad into position on tape.
NOTE: REPLACEMENT INSULATION MUST HAVE CLASS ‘O’ FIRE RESISTANCE
