Carrier 40QA024-060 specifications Installing Hex-HeadMounting Bolts, in Fan Coil Unit

Fig. 6 — Installing Hex-Head Mounting Bolts

in Fan Coil Unit

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

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

Fig. 9 — Removing Rear Knockout in Side Panel

if Right-Side Piping Connection is Used

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.

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 cor- rect 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 Appli- cation Guide.

DO NOT BURY MORE THAN 36 IN. OF REFRIGER- ANT PIPE IN THE GROUND. If any section of pipe is buried, there must be a 6-in. vertical rise to the valve con- nections on the outdoor unit. If more than the recommended length is buried, refrigerant may migrate to the cooler, bur- ied section during extended periods of unit shutdown, caus- ing 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 accept- able heat resistant closed-cell foam insulation (mini- mum 3/8-in. wall thickness). When insulating piping, cap ends and slide insulation over the piping. Insula- tion 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 transmitted 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 meter- ing 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 require- ments. The arrow on the metering device body must face away from the indoor coil.

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