PF4MNB, PF4MNP: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
Downflow Installation
In this application, field conversion of the evaporator is required using
accessory downflow kit along with an accessory base kit. Use fireproof
resilient gasket, 1/8 to 1/4-in (3 to 6 mm) thick, between duct, unit, and
floor.
NOTE: To convert units for downflow applications, refer to Installation
Instructions supplied with kit for proper installation. For slope fan coils,
use kit Part No. KFADC0201SLP. For A-coils, use kit Part No.
KFADC0401ACL. Use fireproof resilient gasket, 1/8 to 1/4-in (3 to 6
mm) thick, between duct, unit, and floor.
NOTE: Gasket kit number KFAHD0101SLP is also required for all
downflow applications to maintain low air leak/low sweat performance.
Horizontal Installation
Units must not be installed with access panels facing up or down. All
other units are factory built for horizontal left installation (Fig. 2 and
Fig. 3). When suspending unit from ceiling, dimples in casing indicate
suitable location of screws for mounting metal support straps (Fig. 2).
For horizontal applications having high return static and humid return
air, the Water Management Kit, KFAHC0125AAA, may need to be used
to assist in water management.
NOTE: Modular units can be disassembled and components moved
separately to installation area for reassembly. This process
accommodates small scuttle holes and limiting entrances to installation
sites (Fig. 6).
Horizontal Right Conversion of Units with Slope Coils
NOTE: Gasket kit number KFAHD0101SLP is required for horizontal
slope coil conversion to maintain low air leak/low sweat performance.
1. Remove blower and coil access panels and fitting panel (Fig. 5).
2. Remove coil mounting screw securing coil assembly to right side
casing flange.
3. Remove coil assembly.
4. Lay fan coil on its right side and reinstall coil assembly with
condensate pan down (Fig. 4).
5. Attach coil to casing flange using previously removed coil
mounting screw.
6. Make sure pan cap in fitting door is properly seated on fitting door
to retain low air leak rating of the unit.
7. Add gaskets from kit - KFAHD.
8. Align holes with tubing connections and condensate pan
connections. Reinstall access panels and fitting panel.
9. Make sure liquid and suction tube grommets are in place to prevent
air leaks and cabinet sweating. Install grommets after brazing.
Horizontal Right Conversion of Units with A-Coils
1. Remove blower and coil access panels (Fig. 5).
2. Remove metal clip securing fitting panel to condensate pan.
Remove fitting panel.
3. Remove 2 snap-in clips securing A-coil in unit.
4. Slide coil and pan assembly out of unit.
5. Remove horizontal drain pan support bracket from coil support rail
on left side of unit and reinstall on coil support rail on right side of
unit (Fig. 7).
6. Convert air seal assembly for horizontal right.
a. Remove air seal assembly from coil by removing 4 screws
(Fig. 5).
b. Remove air splitter (B) from coil seal assembly by removing 3
screws (Fig. 3 inset).
c. Remove filler plate (A) and install air splitter (B) in place of filler
plate.
d. Install filler plate (A) as shown in horizontal right application.
e. Remove condensate troughs (C) and install on opposite tube
sheets.
f. Install hose onto plastic spout.
7. Install horizontal pan on right side of coil assembly.
8. Slide coil assembly into casing. Be sure coil bracket on each corner
of vertical pan engages coil support rails.
9. Reinstall 2 snap-in clips to correctly position and secure coil
assembly in unit. Be sure clip with large offsets is used on right side
of unit to secure horizontal pan.
10. Remove two oval fitting caps from left side of the coil, access
panel, and fitting panel.
11. Remove insulation knockouts on right side of coil access panel.
12. Remove 2 oval coil access panel plugs and reinstall into holes on
left side of coil access panel and fitting panel.
13. Install condensate pan fitting caps (from Step 10) in right side of
coil door making sure that cap snaps and seats cleanly on back side
of the coil door. Make sure no insulation interferes with seating of
cap.
14. Reinstall access and fitting panels, aligning holes with tubing
connections and condensate pan connections. Be sure to reinstall
metal clip between fitting panel and vertical condensate pan.
15. Make sure liquid and suction tube grommets are in place to prevent
air leaks and cabinet sweating.
Manufactured and Mobile Home Housing Applications
1. Fan coil unit must be secured to the structure using field-supplied
hardware.
2. Allow a minimum of 24-in (610 mm) clearance from access panels.
3. Recommended method of securing for typical applications:
a. If fan coil is away from wall, attach pipe strap to top of fan coil
using no. 10 self-tapping screws. Angle strap down and away
from back of fan coil, remove all slack, and fasten to wall stud of
structure using 5/16-in. lag screws. Typical both sides of fan coil.
b. If fan coil is against wall, secure fan coil to wall stud using 1/8-in
(3 mm) thick right-angle brackets. Attach brackets to fan coil
using no. 10 self-tapping screws and to wall stud using 5/16-in.
lag screws (Fig. 8).
CAUTION
!
PRODUCT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or property damage.
The conversion of the fan coil to downflow requires special procedures
for the condensate drains on both A-coil and Slope-coil units. The
vertical drains have an overflow hole between the primary and
secondary drain holes. This hole is plugged for all applications except
downflow, and must be used for downflow. During conversion process,
remove plastic cap covering vertical drains only and discard. Remove
plug from overflow hole and discard. At completion of downflow
installation, caulk around vertical pan fitting to door joint to retain low
air leak performance of the unit.
CAUTION
!
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or property damage.
For optimum condensate drainage performance in horizontal
installations, unit should be leveled along its length and width.
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