Siemens Venturi Air Valve Installation Instructions

Document No. 546-00580 | May 22, 2012

Product Overview

The Siemens Venturi Air Valve is a pre-packaged, easy-to-install airflow measurement and control solution. It provides stable and precise airflow control for room supply, room general exhaust, or fume hood exhaust.

Options

Sizes: 6 in, 8 in, 10 in, 12 in, 2 x 10 in, 2 x 12 in, 3 x 12 in
Construction: Aluminum or Heresite coated
Controller Integration: Laboratory Room Controller (LRC) in an enclosure with or without Fume hoods
Control Types: Constant Air Volume Controller (CAV), Variable Air Volume Controller (VAV)
Additional Features: Hot water reheat coils (one or two row)

Electronic Actuation

Control packages include fast-acting or basic electronic actuation (optional) and a differential pressure transmitter (optional). These components are factory-mounted in an enclosure on the outside of the valve.

Expected Installation Time

30 minutes

Required Tools and Materials

Small flat blade screwdriver
3/8-inch open end wrench
Needle nose pliers
Sealant
1/4-inch poly tubing

Prerequisites

Valve ductwork free of debris
Construction filters in place
Supply/Exhaust ductwork installed
Water lines installed (if reheat coils are used)

? NOTE: Valves should be located to avoid contact with rigid conduit, sprinkler piping, Greenfield metal covering, or rigid pneumatic tubing. Avoid installing valves tightly against concrete slabs or columns, as vibrations can be amplified. Ensure clearance for service access to controls.

Installation Instructions

These installation instructions are provided for various actuator types of Venturi Air Valves and consist of the following sections:

Section 1: Mounting the valve.
Section 2: Adjusting AVC airflow.
Section 3: Actuation and sensors.

Section 1: Mounting

Move the valve to the installation area. Remove the valve from its shipping package. Do not carry the valve by the flow sensor, valve extension rod, or any controls. Refer to Table 1 for single-body and Table 3 for multi-body valve measurements.
? NOTE: Take care not to break or bend the airflow sensor taps during installation.
Verify the correct airflow direction and orientation of the valve in the ductwork (e.g., Horizontal).
? NOTE: Before installing, hold the valve in its intended position and push on the internal cone to ensure it moves freely. Valves not mounted in a true horizontal or vertical position (as determined by a level) may have performance issues. If a controls enclosure is attached, it must be mounted vertically.
Support the ductwork within 12 inches of the valve.
? NOTE: For single-bodied air valves, do not crimp or otherwise deform the ends of round air valves.
Connect the ductwork to the valve's inlet collar using drawband, bolting, or other accepted trade practice.
A diagram illustrates a drawband connection for ductwork and valve.
Connect the ductwork to the valve's outlet collar using drawband, bolting, or other accepted trade practice.
Seal all ductwork and verify that the duct connections are airtight.

Venturi Air Valve Dimensions

Table 1: Single-body Venturi Air Valve Dimensions

Air Valve Size	Length (L)	Inlet/Outlet Outside Dia. (OD)	Overall Height (H_O)	Overall Height with Enclosure (H_E)	Overall Width with Enclosure (W_E)
106	21 3/4	552	5 15/16	151	13 15/16	354	13 7/8	352	9 1/4	235
108	24 3/4	629	7 7/8	200	15 7/8	403	14 7/8	378	9 1/4	235
110	26 1/2	673	9 7/8	251	17 7/8	454	15 7/8	403	10	254
112	29 1/2	749	11 7/8	302	19 7/8	505	17 7/8	454	12	305

Valve Configurations

Diagrams illustrate different valve configurations:

AVC (Constant Volume): No actuator. Dimension H_O = OD + 4".
AVV (Variable Volume) with Actuator Bracket: Dimension H_O = OD + 8".
AVV (Variable Volume) with Enclosure: Dimension W_E = Max [W₁ or W₂]. Requires 12" spacing around the enclosure for access.

Flanged ends are available for single-body Air Valves, without bolt holes. These have a Flange End width of 1.5 inches.

Table 2: Multi-Body Venturi Air Valve Dimensions

Slip Configuration (S & I)

Size	Matching Duct Minimum Inside		Matching Duct Outside Dimension		Face-to-face Length^a) (L₁)	Slip Tab Length	Overall Height with Enclosure
Size	Height	Width	Height (H)	Width (W)	Face-to-face Length^a) (L₁)	Slip Tab Length	Overall Height with Enclosure
2x10	10	21	11	22	29 1/2	1.5	19
2x12	12	25	13	26	32 1/2	1.5	21
3x12	12	38	13	39	32 1/2	1.5	21

^a) Slip end Air Valves need an extra 3 inches of clearance during installation.

Flange Configuration (F & J)

Size	Matching Duct Minimum Inside		Matching Duct Outside Dimension		Face-to-face Length^a) (L_1-3)	Overall Height with Enclosure
Size	Height	Width	Height (H)	Width (W)	Face-to-face Length^a) (L_1-3)	Overall Height with Enclosure
2x10	10	21	12	23	26 1/2	19
2x12	12	25	14	27	29 1/2	21
3x12	12	38	14	40	29 1/2	21

Diagrams of a Dual Air Valve -- Slip End and a Triple Air Valve -- Flange End are provided.

Section 2: Adjusting AVC Valve Airflow

The control arm is held by a threaded rod with two nuts on opposite sides of the flange on the indicator gauge. To change the flow setting:

Locate the nut on the upstream side of the indicator gauge flange (towards the valve inlet where the flow sensor is located). This is the calibration locking nut. Loosen this nut and back it off to provide sufficient distance to adjust the flow.
Locate the nut on the downstream side to move the control arm. This is the flow adjustment nut. Turning this nut clockwise reduces airflow. Turn it counter-clockwise to increase airflow rate.
Once the required airflow is achieved, tighten the calibration locking nut.

Diagrams for Style 1 AVC and Style 2 AVC are provided, showing the flow adjustment nut and calibration locking nut.

Section 3: Controls, Sensors and Actuation

Differential Pressure Transmitter

Connect a two-conductor 20 AWG cable to the controller's 4 to 20 mA input. Connect the wire to the differential pressure transmitter or through the wiring bushing/knockout to the transmitter inside the enclosure. Connect the cable to the differential pressure transmitter.

A diagram illustrates differential pressure transmitter wiring connections, showing high-pressure port, low-pressure port, span adjustment, zero adjustment, and transducer terminals.

GMA 121 Actuation

2-position control, 24 Vac/dc.

Table 4: 2-position Control 24 Vac

Standard Symbol	Function	Terminal Designation	Color	Color Symbol
1	Supply (SP)	G	Red	RD
2	System Neutral	G0	Black	BK

A diagram shows the wiring for 2-position GMA 121 Actuators.

GDE/GLB 131 Actuation

Wiring

All wiring must conform to NEC and local codes and regulations.
Use earth ground isolating step-down Class 2 transformers. Do not use auto transformers.
Determine the supply transformer rating by summing the total VA of all actuators used.

Three-position control (24 Vac), 24 Vac power supply.

Table 5: 3-position Control 24 Vac

Standard Symbol	Function	Terminal Designation	Color Standard	Plenum Color
1	Supply (SP)	G	Red	Red
6	Control signal clockwise	Y1	Violet	Violet
7	Control signal counter-clockwise	Y2	Orange	Orange

GLB/GDE/GMA 161 Actuation

Modulating control (0-10V), 24 Vac/dc.

Table 6: Modulating Control 24 Vac

Standard Symbol	Function	Terminal Designation	Color	Color Symbol
1	Supply (SP)	G	Red	RD
2	System Neutral	G0	Black	BK
8	Input Signal: 0-10 Vdc (GMA161) or 2-10 Vdc (GMA15x)	Y	Gray	GY
9	Position Output: 0-10 Vdc (GMA161) or 2-10 Vdc (GMA15x)	U	Pink	PK

A diagram shows actuator wiring for VAV/CV TECs.

GNP191 Actuation - Modulating Control (0 to 10 Vdc)

Connect the Fast Acting Lab Electronic Actuator to a source of 24 Vac power.
Connect the wire from the Fast Acting Lab Electronic Actuator to the controller.

Diagrams show switch settings for the Fast Acting Lab Electronic Actuator for both supply and exhaust configurations.

GNP191 Actuation - Pulsed Control

Connect the Fast Acting Lab Electronic Actuator to a source of 24 Vac power.
Connect the wire from the Fast Acting Lab Electronic Actuator to the controller.

⚠️ CAUTION: This actuator requires a maximum of 20 VA, 24 Vac source. DO NOT connect any other non-isolated devices to the transformer that powers the electronic actuator or the hot water valve actuator.

? NOTE: Refer to the Open Air® GNP/GAP Fail-Safe/Fail-in-Place 53 lb-in (6 Nm), Rotary, Electronic Damper Actuators Technical Instructions (155-771) for more details.