Carrier 42C,V Manual de instalación descargar pdf (Pagina 53)

10. Use adhesive or glue to re-attach insulation that has

pulled away from the unit during knockout removal

process.

11. For ducted applications tape should be applied along and

around all of the supply air opening knockouts to prevent

air leakage.

Step 2 — Make Piping Connections — Access to

piping is available through the access panels at the side of the

units or front of the unit. Qualified personnel in accordance

with local and national codes must perform all piping connec-

tions. Refer to Tables 1-4 for piping connections.

NOTE: It is important to have a common understanding of

which side of the unit is the right hand side and which is the

left hand side.

When facing the supply air outlet from the front of the unit

(air blowing in your face), your right hand will be on the right

side of the unit and your left hand will be on the left side of the

unit. See Fig. 65. Refer to Fig. 66 and 67 for typical piping

connections.

The supply and return piping connections of the factory-

provided valve package are either swaged for field brazing

(standard) or union fitted (optional) for field connection to the

coil.

VALVE PACKAGES — There are limitations on physical

size of pneumatic valves, quantity and type of matching

components, and required control interface. See Fig. 68.

Consult factory before ordering any special valve package

components that are not covered in this book.

Valve packages are shipped with the units or in unit cartons.

Valve packages include belled ends for field soldering to coil

connections.

All factory-furnished cooling valve packages are arranged

to position as much of the package as possible over an auxiliary

drain pan or drip lip. This helps minimize field piping insula-

tion requirements. Refer to Fig. 69-72 for pipe connection

configurations. See Table 7 for descriptions of common piping

components.

KNOCKOUT TAB

10 PLACES

DUCT BREAK

4 PLACES

KNOCKOUT TAB

TRIM LINE

a42-4301

Fig. 63 — 42SM Unit Supply Air Installation

UNIT

WALL

UNIT

INSULATION

90º

DUCT FLANGE

Fig. 64 — 42SM Unit Supply Air Installation

a42-4302

Fig. 65 — Unit End Reference

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 87 88

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