Installing Hex-Head Mounting Bolts Fan Coil Unit

a40-620

Fig. 6 — Installing Hex-Head Mounting Bolts

in Fan Coil Unit

a40-930

DIMENSIONS (in.)

UNIT SIZE	A	B	C
024	5015/16	46	495/8
036	5813/16	537/8	571/2
048	719/16	665/8	701/4
060	92	87	905/8

Fig. 7 — Fan Coil Unit Hanging Dimensions

a40-1464

DIMENSIONS (in.)

UNIT SIZE	B	C
024	46	495/8
036	537/8	571/2
048	665/8	701/4
060	87	905/8

*Exposed mounting holes.

†Reverse bracket holes (concealed mounting).

Fig. 8 — Mounting Included with

Fan Coil Unit

a40-932

Fig. 9 — Removing Rear Knockout in Side Panel

if Right-Side Piping Connection is Used

F. To Install Thermostat:

If there is at least 3/8 in. of space between the back of indoor unit and wall:

1.Route thermostat wires (field-supplied) through slot in right side or rear panel of indoor unit (Fig. 3).

2.Route wires over refrigerant and drain piping as shown in Fig. 12.

IMPORTANT: Do not route wires under the piping, or wires could impede air filter removal.

IV. STEP 4 — CONNECT REFRIGERANT PIPING

Fan coil units may be connected to outdoor units using field- supplied refrigerant grade piping. Refer to Tables 3A and 3B for the correct size piping. The length of refrigerant pipe depends on the unit placement and building structure; run pipes as directly as possible. For piping requirements over 50 ft of total run, or more than 25 ft of lift, consult the Residential Long Line Application Guide.

CAUTION: DO NOT BURY MORE THAN 36 IN. OF REFRIGERANT PIPE IN THE GROUND. If any section of pipe is buried, there must be a 6-in. vertical rise to the valve connections on the outdoor unit. If more than the recommended length is buried, refriger- ant may migrate to the cooler, buried section during extended periods of unit shutdown, causing refrigerant slugging and possible compressor damage at start-up.

To connect piping:

1.Install insulation. It is extremely important that all refrigerant lines and the metering device be insulated on heat pumps and multi-splits. On cooling only units, the liquid line may be left uninsulated. Use any acceptable heat resistant closed-cell foam insulation (minimum 3/8-in. wall thickness). When insulating piping, cap ends and slide insulation over the piping. Insulation can also be cut and placed over piping.

2.Run liquid and gas refrigerant piping.

a.Run pipes as directly as possible, and avoid any unnecessary turns and bends.

b.Suspend refrigerant pipes so that the insulation is not damaged and vibrations are not transmit- ted to the structure.

c.Leave slack in the refrigerant pipe between the structure and the unit to absorb vibrations.

d.A piston is shipped in the factory-installed metering device body (Fig. 13) with the indoor unit. Use Tables 4A-4C to verify that you have the required piston size for the system being installed.

IMPORTANT: The metering device is factory-installed and only needs to be replaced for long line applications or if the system combination requires it. See Tables 4A-4C. See Fig. 13.

e.For special applications such as long lines or raised elevations, consult the Residential Long Line Application Guide for specific system requirements. The arrow on the metering device body must face away from the indoor coil.

f.Refer to the outdoor unit Installation, Start-Up and Service Instructions for additional information.

g.Install a factory-supplied filter drier near the outdoor unit. On heat pump systems, a bi-flow filter drier must be used.

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