Carrier RDS006-060 Mounting the Unit, Conversion Right Return, Side Discharge to Back Discharge

Water

Connection End

Return Air

Supply

Duct

Side Discharge	Water
	Connection End

Return Air

vibration absorption pad slightly larger than the entire base to minimize vibration transmission. It is not necessary to mount the unit on the floor. See Fig. 14.

NOTE: Some codes require the use of a secondary drain pan under vertical units. Check local codes for more information.

Step 5 — Duct System — Size the duct system to han- dle the design airflow quietly.

NOTE: Depending on the unit, the fan wheel may have a ship- ping support installed at the factory. This must be removed before operating unit.

SOUND ATTENUATION — To eliminate the transfer of vibration to the duct system, a flexible connector is recom- mended for both discharge and return air duct connections on

Drain

Discharge Air

Back Discharge

metal duct systems. The supply and return plenums should in- clude internal duct liner of fiberglass or be made of duct board construction to maximize sound attenuation of the blower. Installing the WSHP unit to uninsulated ductwork in an uncon- ditioned space is not recommended since it will sweat and

Fig. 12 — Conversion Right Return,

Side Discharge to Back Discharge

Step 4 — Mounting the Unit

HORIZONTAL UNITS (50RHC,RHR,RHS) — Horizontal units should be mounted using the factory-installed hangers. Proper attachment of hanging rods to building structure is critical for safety. See Fig. 4 and 13. Rod attachments must be able to sup- port the weight of the unit. See Tables 1-3 for unit operating weights.

VERTICAL UNITS (50RVC,RVR,RVS,RDS) — Vertical and downflow units are available in left or right return air configu- rations. See Fig. 6-8. Mount the unit (except 50RDS) on a

D

		Compressor
			Air Handler
C	A			E
		Section
			Section

B

50RHC UNITS		DIMENSIONS (in.)
	A		B	C
006-012	16.9		34.1	21.1
018-030	18		43.1	22.2
036,042	18		47.1	22.2
048,060	22		54.1	26.2

50RHR UNITS		DIMENSIONS (in.)
	A	B	C	D	E
006-024	22.375	43.1	24.375	43.1	20.375
030,036	22.375	52.1	24.375	52.1	20.375
042,048	22.375	61.1	24.375	61.1	20.375
060	25.375	71.1	27.375	71.1	23.375

50RHS UNITS		DIMENSIONS (in.)
	A	B	C	D	E
015,018	22.375	51	24.375	53	20.375
024-036	22.375	61	24.375	63	20.375
042,048	25.375	70	27.375	72	20.375
060	25.375	75	27.375	77	23.375
070	25.375	80	27.375	82	23.375

Fig. 13 — Horizontal Hanger Bracket

(Factory Installed)

adversely affect the unit’s performance.

To reduce air noise, at least one 90-degree elbow could be included in the supply and return air ducts, provided system performance is not adversely impacted. The blower speed can also be changed in the field to reduce air noise or excessive air- flow, provided system performance is not adversely impacted.

EXISTING DUCT SYSTEM — If the unit is connected to existing ductwork, consider the following:

•Verify that the existing ducts have the proper capacity to handle the unit airflow. If the ductwork is too small, install larger ductwork.

•Check existing ductwork for leaks and repair as necessary.

NOTE: Local codes may require ventilation air to enter the space for proper indoor air quality. Hard-duct ventilation may be required for the ventilating air supply. If hard ducted venti- lation is not required, be sure that a proper air path is provided for ventilation air to unit to meet ventilation requirement of the space.

Vibration

Absorption

Pad

Fig. 14 — 50RVC,RVR,RVS Units Mounted With

Vibration Absorption Pad

15