Carrier Install Supply Grille, Pre-Start-Up, a50-8302.eps, 50VS Unit Airflow Arrangements

Step 12 — Install Supply Grille

Refer to Fig. 2, 3, and 12 to determine grille size and location based on the type and size of the unit cabinet/chassis combina- tion. Perform the following to install supply grilles over the cabinet discharge openings.

1.To prevent supply air from short circuiting back into the return air panel a supply duct extension(s) is provided with each cabinet.

2.Insert the grille into the cabinet supply duct extension(s). Assure that the grille flange rests against the drywall cov- ering the cabinet.

3.Secure the grille to the drywall with the screws provided.

NO SUPPLY OPENINGS

NA NC NB

SINGLE SUPPLY

SC SA SB

a50-8302.eps

SG SE SF

PRE-START-UP

Check the following before system start-up.

1.Balancing/shutoff valves: Ensure that all isolation valves are open and water control valves are wired.

2.Line voltage and wiring: Verify that voltage is within an acceptable range for the unit and wiring and fuses/break- ers are properly sized. Verify that low voltage wiring is complete.

3.Entering water and air: Ensure that entering water and air temperatures are within operating limits of Table 9.

DOUBLE SUPPLY

DB	DC	DA
DF	DG	DE

DK DL DJ

TRIPLE SUPPLY

SL SJ SK

SUPPLY RETURN

DRAIN

RISERS

LEFT RIGHT

CABINET

FRONT

Supply Grille Sizes and Arrangements

UNIT	DISCHARGE (in.)
	Single	Double	Triple
50VSA,B	14x12	10x8	10x8
(Small Cabinet)
50VSC,D	14x12	10x8	10x8
(Small Cabinet)
50VSE,F	14x12	10x8	10x8
(Small Cabinet)
50VSG,H	14x12	10x8	10x8
(Small Cabinet)
50VSI,J	16x14	12x10	12x10
(Large Cabinet)
50VSK,L	16x14	12x10	12x10
(Large Cabinet)
50VSM,N	16x14	12x10	12x10
(Large Cabinet)

TA TE TJ

SUPPLY AIR TO ROOM

RETURN AIR FROM ROOM

Field-supplied and installed piping Cross hoses in slave cabinet

(36 in. hoses required in slave unit)

SR R

C C

RS S

SLAVE		MASTER
			LEGEND
Dimension to suit local codes			C — Condensate Drain
	and installer		R — Return

S — Supply

NOTES:

1.Refer to the table and the airflow arrangements above to determine grille size and location based on the type and size of the unit cabinet/chassis combination.

2.The riser compartment is defined as being the rear of each unit. Supply air grilles and return air/access panel can be any side except rear.

3.Return air location also denotes the control location and servicing access.

4.Single discharge openings are not recommended for 50VSI-VSN units. Triple discharge openings are not recommended for 50VSA-VSD units.

Fig. 12 — 50VS Unit Airflow Arrangements

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