Taco 409 User Manual

Instruction Sheet

409 High Pressure Vent

402-008

SUPERSEDES: November 1, 2003 EFFECTIVE: October 1, 2007

Plant ID: No. 001-3806

INSTALLATION INSTRUCTIONS:

1. The Taco 409 has to be mounted in a vertical (or upright)
position on places in a system where air collects natu­rally. It will not operate properly if installed at an angle,
sideways, or upside down.

2. For the Taco 409 to vent air properly, the fill pressure of
the system must always be higher than atmospheric
pressure. If the atmospheric pressure is higher than the
fill pressure of the system, outside air will be pulled into
the system via the vent opening.

3. The Taco 409 is intended for installations filled with
100% water or approved glycol solutions (do not
exceed 50% glycol) for hydronic heating systems.
However, please check with your local dealer, distribu­tor or representative when using other boiler or system
additives.

4. The Taco 409 will arrive with its air valve open. The air
valve can be closed off by turning the screw clockwise.
However, for automatic performance, the vent valve
must be open.

5. Please note that when installing a new system or retro­fitting an old, you must flush out the disturbed dirt as
well as any oily film or solder paste entrained in the sys­tem water. If this is not done, it is entirely possible that
the internal float mechanism will become clogged open,
causing the air vent to leak. For installations where pos­sible property damage may occur due to fluid leaking
from the vent, a

3

⁄4" ID hose may be clamped to the air
vent outlet. The hose may then be fed to a drain or col­lection area designed for the fluid in use. DO NOT USE

A SOLDER CONNECTION AT THE OUTLET!

6. Please leave these instructions with the end user.

1

2

3

4

6

5

7

1. Gearing

2. Venting valve

3. Air chamber

4. Float

5. Protective filter

6. Housing (brass)

7.

3

⁄4" NPT connection

Maximum allowable working temperature: 240°F
Minimum allowable working temperature: 35°F
Maximum working pressure: 150 psi

CAUTION: Do
not solder here.
Product failure
will result.

Do it Once. Do it Right.

®

TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: [phone] FAX: [phone].
TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: [phone]. FAX: [phone].

Visit our web site at: http://www.taco-hvac.com

Copyright 2007

TACO, Inc.

Ta co, Inc. will repair or replace without charge
(at the company’s option) any product or part
which is proven defective under normal use
within one (1) year from the date of start-up or
one (1) year and six (6) months from date of
shipment (whichever occurs first).

In order to obtain service under this warranty, it
is the responsibility of the purchaser to prompt­ly notify the local Taco stocking distributor or
Taco in writing and promptly deliver the subject
product or part, delivery prepaid, to the stocking
distributor. For assistance on warranty returns,
the purchaser may either contact the local Taco
stocking distributor or Taco. If the subject prod­uct or part contains no defect as covered in this
warranty, the purchaser will be billed for parts
and labor charges in effect at time of factory
examination and repair.

Any Taco product or part not installed or operat­ed in conformity with Taco instructions or which

has been subject to misuse, misapplication, the
addition of petroleum-based fluids or certain
chemical additives to the systems, or other
abuse, will not be covered by this warranty.

If in doubt as to whether a particular substance
is suitable for use with a Taco product or part, or
for any application restrictions, consult the
applicable Taco instruction sheets or contact
Taco at [401-942-8000].

Taco reserves the right to provide replacement
products and parts which are substantially simi­lar in design and functionally equivalent to the
defective product or part. Taco reserves the right
to make changes in details of design, construc­tion, or arrangement of materials of its products
without notification.

TACO OFFERS THIS WARRANTY IN LIEU OF
ALL OTHER EXPRESS WARRANTIES. ANY
WARRANTY IMPLIED BY LAW INCLUDING
WARRANTIES OF MERCHANTABILITY OR

FITNESS IS IN EFFECT ONLY FOR THE DURA­TION OF THE EXPRESS WARRANTY SET
FORTH IN THE FIRST PARAGRAPH ABOVE.

THE ABOVE WARRANTIES ARE IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR
STATUTORY, OR ANY OTHER WARRANTY
OBLIGATION ON THE PART OF TACO.

TACO WILL NOT BE LIABLE FOR ANY SPE­CIAL, INCIDENTAL, INDIRECT OR CONSE­QUENTIAL DAMAGES RESULTING FROM THE
USE OF ITS PRODUCTS OR ANY INCIDENTAL
COSTS OF REMOVING OR REPLACING
DEFECTIVE PRODUCTS.

This warranty gives the purchaser specific
rights, and the purchaser may have other rights
which vary from state to state. Some states do
not allow limitations on how long an implied
warranty lasts or on the exclusion of incidental
or consequential damages, so these limitations
or exclusions may not apply to you.

LIMITED WARRANTY STATEMENT

4-24-198/10-2003 Printed in Holland