Coil Installation - Carrier AERO 39MN Installation, Start-Up And Service Instructions Manual

Coil Installation

NOTE: If installing a replacement coil, refer to Coil Removal
section, page 132 for instructions on removing existing coil.
INSTALLATION OF SINGLE HEIGHT COILS (sizes 03-
36)
1. Lock open and tag all power supplies to unit fan motor
and electric heaters if present.
2. Remove service panel/coil connection panel and the up-
stream service panel and set aside in a safe place.
3. a. Remove the flat corner plug from each end piece of
the top rail.
b. Extract the Torx T25 screw visible within the
exposed cavity. (Do not mix these screws with oth-
ers; they are specific for this location. Set screws
aside for reinstallation of the top rail.)
c. Remove the top rail by pulling out at a 45-degree
angle. Set top rail aside.
CAUTION
Do not handle the coil by the headers or connection nipples,
as irreparable damage might occur that is NOT covered by
warranty. Protect the finned surface from damage during all
handling and shipping.
4. Slip the foam sealing sleeves on the connection nipples
before installing the coil.
5. The coil may now be hoisted in through the top opening,
or it may be slid in through either side, taking care to
avoid tipping or dropping the coil. Some lower stacked
unit sections may require slightly tipping the coil from
the vertical position in order to clear the upper frame rail
and seal, which is not readily removed.
6. Loosely secure the coil at the top using the
ter hoisting holes located in the side channel/tube sheet
juncture at each end.
7. Install the first coil in the section. Access the upstream
face of the coil and install the screws holding the coil to
the mounting baffles around the entire perimeter. This
may require reaching through an opened damper assem-
bly or through the filter track after filters are removed.
8. Replace the top rail by reinstalling the Torx T25 screws
and flat corner plugs.
9. Replace all service panels.
INSTALLATION OF STACKED COILS (Sizes 40-110)
IMPORTANT: The lengths of the coil supports and
intermediate pans and channels are designed to work
with Carrier coils. Substitution of other manufacturer's
coils may require that custom mounting components be
field fabricated. Coil sections ordered without coils will
come with the referenced parts in kit form.
NOTE: The length that the intermediate drain pan extends
downstream from the coil face has been designed for use
with Carrier manufactured coils, and may prove insufficient
for other maker's coils.
1. Lock open and tag all power supplies to unit fan motor
and electric heaters if present.
2. Remove service panel/coil connection panel and the up-
stream service panel and set aside in a safe place.
3. a. Remove the flat corner plug from each end piece of
b. Extract the Torx T25 screw visible within the
c. Remove the top rail by pulling out at a 45-degree
Do not handle the coil by the headers or connection nipples,
as irreparable damage might occur that is NOT covered by
warranty. Protect the finned surface from damage during all
handling and shipping.
4. Slip the foam sealing sleeves on the connection nipples
before installing the coil.
5. Before placing the coils inside the unit, apply the adhe-
sive backed gasket to the lower baffle, spanning the en-
tire unit, on the surface that will contact the coil (see
Fig. 59).
6. a. Place the lower coil on the coil supports, sliding the
b. Place the heavy vertical angle (which is full height
3 / -in. diame-
c. Secure the lower side casing of the coil to the lower
8
7. For coil sections that do not have a drain pan within the
section, go to Step 10.
8. Secure the spacer (hat channel) to the top center of the
lower coil casing (see Fig. 60).
Do not penetrate through the coil casing into the fin pack.
Tube damage may occur.
9. Secure two spacers (hat channels) to each end of the
bottom of the upper coil casing before placing the coil in
position (refer to Fig. 59).
10. Place the intermediate condensate drain pan on the low-
er coil, centering the drain pan between the sides of the
unit, with the condensate outlet holes along the down-
stream edge. (It may be helpful to temporarily secure the
drain pan by a strip of double-stick tape on the center
hat channel.)
11. Lift the upper coil (with spacer hat channels on the bot-
tom of each end) into place, aligning the upper coil with
the lower coil. When the upper coil is lowered into
place, it will deflect the intermediate condensate pan
downward on each end, providing for positive drainage.
12. Install factory-supplied screws around the ends and top
of the coil.
78
the top rail.
exposed cavity. (Do not mix these screws with oth-
ers; they are specific for this location. Set screws
aside for reinstallation of the top rail.)
angle. Set top rail aside.
CAUTION
coil against the upstream baffle and aligning the
mounting holes so that the connection nipple will
extend approximately 3 in. outside the unit casing.
of the finished coil bank) along the upstream right
and left side of the mounting baffles (see Fig. 59).
Install screws through this angle first and then into
the baffles, engaging the coil tube sheet mounting
holes and securing the coil within the unit.
horizontal baffle, sandwiching the gasket in
between.
CAUTION