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PF4MNX: Installation Instructions
Introduction
These R-410A Fan Coils are designed for installation flexibility. The
units leave the factory compliant with low leak requirements of less than
2% cabinet leakage rate at 0.5 inches W.C. and 1.4% cabinet leakage rate
at 0.5 inches W.C. when tested in accordance with ASHRAE 193
standard.
All these fan coils use a multi-tap ECM motor for efficiency. The units
have been designed for upflow, downflow (kit required), and horizontal
orientations, including manufactured and mobile home applications.
These units require a field supplied air filter, and are designed
specifically for R-410A refrigerant air conditioners and heat pumps as
shipped. These units are available for systems of 18,000 through 60,000
BTUh nominal cooling capacity. See Product Data literature for all
available accessory kits.
Heater Packages
NOTE: Some heater sizes may require the removal of two screws which
connect the blower housing to the fan deck (removal will not impact
performance). See
(Care and Maintenance on p11)
For units not equipped with factory-installed heat, a factory-approved,
field-installed, UL listed heater package is available from your
equipment supplier. See unit rating plate for a list of factory-approved
heaters. Heaters that are not factory approved could cause damage which
would not be covered under the equipment warranty. If fan coil contains
a factory-installed heater package, minimum circuit ampacity (MCA)
and maximum fuse/breaker may be different than units with a same size
field-installed accessory heater. The differences is not an error and is due
to calculation difference per UL guidelines.
Installation
Check Equipment
Unpack unit and move to final location. Remove carton carefully.
NOTE: Remove shipping block(s)
NOTE: If the door gasket is damaged or missing, the unit may not meet
the ASHRAE 193 standard for cabinet air leakage. See the Product Data
for this model or contact your supplier to order the gasket kit.
Inspect equipment for damage prior to installation. File claim with
shipping company if shipment is damaged or incomplete. Locate unit
rating plate which contains proper installation information. Check rating
plate to be sure unit matches job specifications.
Fig. 1 – Remove Shipping Blocks
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
and
Fig.
21.
(Fig.
1).
A221016A
Mount Unit
Unit can stand or lie on floor, or hang from ceiling or wall. Allow space
for wiring, piping, and servicing unit.
IMPORTANT: When unit is installed over a finished ceiling and/or
living area, building codes may require a field-supplied secondary
condensate pan to be installed under the entire unit. Some localities may
allow as an alternative, the running of a separate, secondary condensate
line. Consult local codes for additional restrictions or precautions.
Nuisance sweating may occur if the unit is installed in a high humidity
environment with low airflow.
Upflow Installation
If return air is to be ducted through a floor, set unit on floor over opening
and use 1/8" to ¼" (3 to 6 mm) thick fireproof resilient gasket between
duct, unit, and floor.
Side return is a field option on slope coil models. Cut opening per
dimensions
(Fig.
2). A field-supplied bottom closure is required.
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 ¼" (3 to 6 mm) thick, between duct, unit, and
floor.
!
PRODUCT OR PROPERTY DAMAGE HAZARD
Failure to follow this warning 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.
NOTE: To convert units for downflow applications, refer to Installation
Instructions supplied with kit for proper installation. See the Product
Data or contact your supplier for the kit number. Use fireproof resilient
gasket, 1/8" to ¼" (3 to 6 mm) thick, between duct, unit, and floor.
NOTE: A gasket kit is also required for all downflow applications to
maintain low air leak/low sweat performance. See the Product Data or
contact your supplier for the kit number.
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.
4). When suspending unit from ceiling, dimples in casing indicate
suitable location of screws for mounting metal support straps
For horizontal applications having high return static and humid return
air, the Water Management Kit may need to be used to assist in water
management. See the Product Data or contact your supplier for the kit
number.
!
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.
2
CAUTION
CAUTION
(Fig. 3
and
(Fig.
3).
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