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Installation

8 VAV-SVN09B-EN

No hanger brackets are provided on these units since the

unit should be supported by means of a hanger strap.The

hanger strap should be secured to the unit casing as

shown in Figure 1, p. 6.

Unit Accessibility

VRRF does not provide internal access, as all functioning

components are external to the unit.

Clearances

For proper service it is recommended that 36" side

clearance be provided for service and access. It is also

recommended that 6" of top and bottom clearance be

provided.

The minimum clearance for the controls is 36".

NEC and/or local codes overrides all clearance

requirements.

Duct Connections Installation

All VRRF units should have a minimum of 1.5 duct

diameters of straight duct prior to the inlet of the VRRF.

This is to allow accurate reading from the flow ring.The

outlet connection is dependent on a number of factors.

The main factor is your application. If the VRRF is used as

a new installation, then you connect the outlet of theVRRF

to the ductwork. If it is a retrofit of an existing unit, then it

depends upon what type of unit you are looking to replace.

(Table 1and Table 2 show the different styles of units and

the possible outlet connection. When determining which

of these two tables to use, reference the fourth digit in

Model Number of the existing VAV unit.)

Table 1. C, D, or E style units

(a)

(a) C, D, E digit is found in the 4th digit of model number

Controls Air Valve Type

Outlet

Connection

Type

Pneumatic Normally Closed

Single Duct

Elec. Heat

Retrofit not

possible

(b)

(b) When retrofit not possible, replace the existing unit.

Pneumatic Normally Closed

Parallel Fan

Elec. Heat

Retrofit not

possible

(b)

Pneumatic Normally Closed All Others 1

Pneumatic Normally Open

Single Duct

Elec. Heat

Pneumatic Normally Open

Parallel Fan

Elec. Heat

Pneumatic Normally Open All Others 1 & 2

Analog Normally Open

Single Duct

Elec. Heat

Analog Normally Open

Parallel Fan

Elec. Heat

Analog Normally Open All Others 1 & 2

DDC Normally Open

Single Duct

Elec. Heat

DDC Normally Open

Parallel Fan

Elec. Heat

DDC Normally Open All Others 1 & 2

Notes:

1. Adapter design (Remove Old Air Valve and replace with Adapter for

RIRO)

2. Standard RIRO unit (Drive valve to max. and install RIRO upstream

of unit.)

Table 2. F style units

(a)

(a) F digit is found in the 4th digit of model number

Controls Air Valve Type

Outlet

Connection

Type

Pneumatic Normally Closed All 2

Analog Normally Open All 2

DDC Normally Open All 2

Notes:

1. Standard RIRO unit (Drive valve to max. and install RIRO upstream of

unit.)

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power can not be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

WARNING

Heavy Objects!

Ensure that all the lifting equipment used is properly

rated for the weight of the unit being lifted. Each of the

cables (chains or slings), hooks, and shackles used to

lift the unit must be capable of supporting the entire

weight of the unit. Lifting cables (chains or slings) may

not be of the same length. Adjust as necessary for even

unit lift. Other lifting arrangements could cause

equipment or property damage. Failure to follow

instructions above or properly lift unit could result in

unit dropping and possibly crushing operator/

technician which could result in death or serious injury.

WARNING

Fiberglass Wool!

Product contains fiberglass wool. Disturbing the

insulation in this product during installation,

maintenance or repair will expose you to airborne

particles of glass wool fibers and ceramic fibers known

to the state of California to cause cancer through

inhalation. You MUST wear all necessary Personal

Protective Equipment (PPE) including gloves, eye

protection, mask, long sleeves and pants when

working with products containing fiberglass wool.

Exposition to glass wool fibers without all necessary

PPE equipment could result in cancer, respiratory, skin

or eye irritation, which could result in death or serious

injury.

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