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.
Make sure liquid and suction tube grommets are in place to prevent air leaks and cabinet sweating.
D.
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” 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. 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. (See Fig. 7.)
PROCEDURE 3—AIR DUCTS
Connect supply-air duct over the outside of 3/4-in. flanges provided on supply-air opening. Secure duct to flange, using proper fasteners for type
of duct used, and seal duct-to-unit joint. If return-air flanges are required, install factory-authorized accessory kit.
Use flexible connectors between ductwork and unit to prevent transmission of vibration. When electric heater is installed, use heat-resistant
material for flexible connector between ductwork and unit at discharge connection. Ductwork passing through unconditioned space must be
insulated and covered with vapor barrier.
Units equipped with 20-30kw electric heaters require a 1-in. clearance to combustible materials for the first 36 in. of supply duct.
Ductwork Acoustical Treatment
Metal duct systems that do not have a 90° elbow and 10 ft of main duct to first branch takeoff may require internal acoustical insulation lining.
As an alternative, fibrous ductwork may be used if constructed and installed in accordance with the latest edition of SMACNA construction
standard on fibrous glass ducts. Both acoustical lining and fibrous ductwork shall comply with National Fire Protection Association as tested by
UL Standard 181 for Class 1 air ducts.
PROCEDURE 4—ELECTRICAL CONNECTIONS
All products from the factory utilize a printed-circuit board (PCB) which has a low voltage circuit protective fuse (5 amp), fan motor speed tap
selection terminal (SPT), and time delay relay (TDR) jumper. To disable the TDR feature, sever the jumper wire JW1. (See Fig. 8.)
When a factory-approved accessory control package has been installed, check all factory wiring per unit wiring diagram and inspect factory wiring
connections to be sure none were loosened in transit or installation. If a different control package is required, see unit rating plate.
CAUTION: If a disconnect switch is to be mounted on unit, select a location where drill or fastener will not contact
electrical or refrigerant components. Failure to follow this CAUTION could result in minor personal injury or porduct and
property damage.
Fig. 5—Conversion for Horizontal Right Applications Using A-Coil
A00071
COIL
SUPPORT
RAIL
COIL
BRACKET
DRAIN PAN
SUPPORT
BRACKET
COIL
SUPPORT
RAIL
COIL
BRACKET
HORIZONTAL
DRAIN PAN
PRIMARY DRAIN
HORIZONTAL RIGHT
SECONDARY DRAIN
HORIZONTAL RIGHT
REFRIGERANT
CONNECTIONS
AIR SEAL
ASSEMBLY
A
B
C
HORIZONTAL
RIGHT
APPLICATION
—5—