Filter
Top Products
26
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.
S Add 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.
4. Reverse the procedure to install new filters.
To install new filters in larger units that have 2 fans,
follow the preceding steps, but use the factory--supplied
filter hook to slide filters within reach for removal. The
filter hook is shipped inside the unit in the filter track.
UNIT OPERATION HAZARD
Failure to follow this caution could cause equipment
damage.
Do not operate unit without air filters.
CAUTION
!
SLIDE
FILTER
RETAINER
CLIP
C10703
Fig. 28 -- Remove Filter Retainer Clip
C10704
Fig. 29 -- Filter Removal/Replacement
40RU