Carrier 42C,V Manual de instalación descargar pdf (Pagina 46)

8. Anchor risers as required:

a. Do not fasten risers rigidly within each unit.

Risers must be free to move within pipe chase

in response to normal vertical expansion and

contraction. The unit internal piping is designed to

accommodate a total riser vertical movement of

in., due to thermal expansion and/or contrac-

tion, when positioned properly at the jobsite.

b. Built-in risers must be anchored at some point

to building structure. Unit design accommodates

up to 1

-in. expansion and contraction in riser

assemblies when positioned properly at the job-

site. Risers must be anchored to the building struc-

ture to limit expansion and contraction movement

to a maximum of 1

inches. Riser anchoring and

expansion compensation is not included in the fac-

tory-supplied unit and must be field provided.

While some special riser features are available

from the factory, riser end caps, air vents, and/or

flushing loops are normally provided on the job by

the installer.

9. Test the system for leaks after the connections are com-

pleted. When testing with air or some other gas, it might

be necessary to tighten stem packing nuts on some valves

to maintain air pressure in the riser. Pressure testing risers

with water should be done with the unit service valves

closed to prevent flushing debris into the unit valve pack-

ages. This will also allow risers to be drained down after

testing in the winter to avoid freeze-up problems. In the

event that leaking or defective components are discov-

ered, the sales representative must be notified before any

repairs are attempted. All leaks should be repaired before

proceeding with the installation.

10. After system integrity has been established, pull the riser

insulation back into place over the joint and glue or seal

to prevent sweating and heat loss or gain. Internal chilled

water piping and valves are located over the drain pan

and need not be insulated.

11. If required, fireproof where necessary. Any fireproofing

requirements where risers or piping penetrate floors or

walls are the responsibility of the installer. This work

should be done only after all pressure testing is complet-

ed. The fireproofing method used must accommodate

pipe expansion and contraction and the piping must be

protected from abrasion and chemical attack. The pipe in-

sulation also must be maintained to prevent sweating and

must be protected from wear or erosion at the joint be-

tween the insulation and the fireproofing material.

42 SU Units

— The unique design of the universal stack fan

coil unit allows for field configuration for each unit. Air dis-

charge, riser, drain, and outside air knockouts have been strate-

gically located on each unit. Risers, shown with unit, are for

reference only. All risers are factory fabricated and shipped

loose for field installation.

It is important that you identify all of the unit feature loca-

tions and which knockouts you intend to use before proceeding

with the installation. See Fig. 43-47. Also, it must be deter-

mined whether your application requires a Mating Unit (prima-

ry/secondary) and its configuration. Consult your local sales

representative or the factory for further details on primary/sec-

ondary arrangements.

Potential 42SU Unit Configurations

Risers: Three Locations — The pre-installed supply, return,

and drain risers (2-pipe or 4-pipe applications) can be oriented

on any of three sides of the unit (see Fig. 43).

NOTE: Risers cannot be installed on the return air side of the

cabinet.

Unit orientation is determined based on the location of the

risers in the building. The riser side of the universal stack unit

always determines the rear of the unit. See Fig. 44.

Return Air: Single Location — The return air/access panel

may then be oriented on the left, right, or front of the unit.

Supply Air: Five Locations (4 sides and top) includes stitched

design for

-in. duct flanges.

Outside Air: Two Locations — Either side adjacent to the

return air opening.

NOTE: Outside air opening may be used on a side if risers are

configured on that same side.

Supply, Return, and Drain Riser Installation

1. Three sides of each universal stack unit have four supply

and return riser knockouts along the center and one drain

knockout near the lower part of the unit (see Fig. 45).

Identify whether your application uses a 2-pipe or 4-pipe

configuration.

a. Two-pipe configurations typically use the two

inner riser knockouts.

b. Four-pipe configurations will use all four riser

knockouts.

IMPORTANT: Chilled water and hot water risers should

never be piped to drain down into the condensate riser.

Extensive water damage can occur due to drain over-

flow. Drain chilled and hot water risers to a remote loca-

tion away from the unit such as sink, room or floor

drains.

42SU

CABINET

RETURN AIR

HR CRDHS

HR CRDHS CS

HR CRDHS

HR = HOT WATER RETURN

HS = HOT WATER SUPPLY

D = DRAIN

CR = COLD WATER RETURN

CS = COLD WATER SUPPLY

R = RETURN

D = DRAIN

S = SUPPLY

2- or 4-PIPE

Fig. 43 — 42SU Unit Configuration

a42-4283

REAR

RISER SIDE

42SU

CABINET

RIGHT

FRONT

LEFT

Fig. 44 — 42SU Unit Orientation

a42-4284

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 87 88

Comentarios a estos manuales

Sin comentarios

Carrier 42C,V Manual de instalación Pagina 46

Comentarios a estos manuales

Relacionado con productos y manuales para Acondicionadores de aire del sistema de división Carrier 42C,V