Carrier 40RU manual Remove Filter Retainer Clip, Filter Removal/Replacement, Unit Operation Hazard

40RU

Chilled Water Coil Freeze Protection - Shut off water supply to unit. Remove side panel of unit and remove vent and drain plugs in top and bottom of coil header. Drain coil and blow out remaining water. Reinstall plugs and side panel.

Alternative freeze protection methods follow:

S Circulate hot water within the water coil’s supply main or supplementary space heating.

S Close off supply lines to unit and open a union or field-supplied drain valve in the return line.

IMPORTANT: Draining from return line will not completely drain water from coils.

S After draining as much water as possible from coils, add sufficient antifreeze to prevent residual water in the coil from freezing.

SAdd a sufficient quantity of non-corrosive antifreeze to the entire system to prevent all water within the system from freezing.

Coil Removal - Remove unit panels and corner posts as required. Disconnect coil connections and remove fastening screws. Remove coil through end or side sections of unit.

Cleaning Cooling Coil - Remove return-air filters. Remove any heavy dirt that may have accumulated on underside of coil. Coil can be cleaned more easily with a stiff brush, vacuum cleaner, or compressed air when coil is dry. If coil is wet or if water is to be used for cleaning, guard against splashing water on electrical components or damaging surrounding area. Clean coil baffles as applicable and check for tight fit to be sure air does not bypass coil.

Cleaning Insulation - The insulation contains an immobilized antimicrobial agent that helps prevent the growth of bacteria and fungi. Clean the inner surface of the insulation according to the separate maintenance instructions shipped with the unit.

Replacing Filters - Filters can be removed and installed from either side of the unit. Install new filters in units that have one fan as follows:

1.Remove the side access panel (retain screws).

2.Remove the filter retainer clip (see Fig. 28).

3.Remove old filters by lifting and tilting them out of the filter track. See Fig. 16 and 29. Use the factory- supplied filter hook to slide filters within reach for re- moval. The filter hook is shipped inside the unit in the filter track

4.Reverse the procedure to install new filters.

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution could cause equipment damage.

Do not operate unit without air filters.

FILTER

RETAINER

CLIP

C10703

Fig. 28 - Remove Filter Retainer Clip

C10704

Fig. 29 - Filter Removal/Replacement

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