Carrier 42C,V Instalační manuál stáhnout pdf (Strana 48)

Table 6 — Unit Riser Orientation

6. Insert cut riser extensions into the bottom swages of the

risers to a penetration depth of 2-inches.

7. Invert the riser with extension to allow for an easier braze.

Make the braze joint according to local building code

specifications.

8. Identify and orient the brazed risers so that they will

match the riser locations for the installed unit. Use Fig. 49

for reference.

9. Insert brazed extension/riser into the building’s floor

block-out hole in the order specified in Fig. 48. Insert ex-

tension into swage of unit below, approximately 2-inches.

10. Verify the floor to riser stub-out and/or ball valve assem-

bly dimension. For a return and supply riser, this dimen-

sion should be 39-inches. For a drain riser, this dimension

should be 5-inches. (See Table 6.)

11. Verify riser stub-out is correctly aligned so that stub-out

will penetrate through the riser knockout slot of the unit.

12. Secure the riser positions for final braze.

13. Make sure braze joint between riser and cut extension ac-

cording to local building code specifications.

14. Repeat steps 2 through 13 for each floor as you move up

the riser column.

15. Once all risers have been installed, the installer must per-

form a leak test for each riser column.

16. Once the riser column has passed its leak test inspection,

each riser extension should be properly insulated. No ex-

posed copper should be allowed for the riser columns.

17. Install the unit drain P-trap per unit instructions.

18. Prepare the unit for assembly per unit instructions.

19. Attach and install hose kits and P-trap to the unit per unit

instructions.

Submittals and product literature detailing unit operation,

controls, and connections should be thoroughly reviewed BE-

FORE beginning the connection and testing of risers and

piping.

To assure optimal unit performance, the supply connec-

tion(s) are marked on the unit’s coil with an “S” meaning sup-

ply or inlet and “R” meaning return or outlet indicating flow di-

rection to and from the coil. Blue letters mark the chilled water

connections and red letters mark the hot water connections.

The unit’s internal piping is designed to accommodate a to-

tal riser vertical movement of ±1½ in., due to thermal expan-

sion and/or contraction, when positioned properly at the job-

site. Risers must be anchored to the building structure to limit

expansion and contraction movement to a maximum of 3 inch-

es. Riser anchoring and expansion compensation is not includ-

ed in the unit and must be provided. Riser end caps, air vents,

and/or flushing loops must be provided at the jobsite by the

installer.

Proper field riser installation and vertical positioning in the

unit should have a pipe run-out to the service valves which are

centered in the knockout access slots and that slope down

slightly away from the riser (see Fig. 48). This prevents con-

densation from running back to the riser and possible damage

from dripping at the bottom of a riser column. Each job has

specific requirements and satisfying those requirements is the

responsibility of the installer.

Riser to Unit Installation

— Before making the riser joints,

the riser insulation must be pulled back away from the joint and

protected from heat during the brazing process. Each riser joint

must be in vertical alignment. Variations in floor-to-floor di-

mensions may require field work such as cutting off or extend-

ing the risers. This operation is the responsibility of the install-

er. The riser joint filler material must be selected to withstand

the total operating pressure (both static and pumping head) to

RISER

TYPE

TOP SWAGE TO

RISER

STUB-OUT (in.)

BOTTOM

SWAGE TO

RISER

STUB-OUT (in.)

STUB-OUT

HIGHT - AFF

(Above

Finished Floor)

Supply

and

Return

Riser

26.75 53 39

Drain

Riser

60.75 19 5

60.75

26.75

SUPPLY/

RETURN

TOP

DRAIN

TOP

Fig. 48 — Riser Extension

42SU

CABINET

RETURN AIR

HR HS

CR CS

R = Return

D = Drain

S = Supply

HR = Hot Water Return

HS = Hot Water Supply

S = Supply

CR = Cold Water Return

CS = Cold Water Supply

Fig. 49 — Brazed Riser Orientation

CAUTION

Toxic residues and loose particles resulting from manufac-

turing and field piping techniques such as joint compounds,

soldering flux, and metal shavings may be present in the

unit and the piping system. Special consideration must be

given to system cleanliness when connecting to solar,

domestic or potable water systems.

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