Taco Comfort Solutions 4900 Series User manual
SUPERSEDES: September 15, 2015 Effective: June 13, 2022
402-080
Plant ID No. 001-5043
Instruction Sheet
4900 Series Air Separators
4900 Series Air & Dirt Separators
Taco 4900 series separators are designed and fabricated to ASME Code
for Unred Pressure Vessels, Sect. VIII Div. 1.
Prior to shipment all separators are hydrostatically tested to 1.3 times their
rated working pressure and certied by an independent Authorized inspec-
tor.
Upon receipt of each separator, the ship-
ping container should be examined for
external damage. If the shipping container
has been damaged in transit, the contents
of the packaging should also be examined
prior to acceptance of the shipment. If the
separator appears to be damaged the
shipment should be refused and or signed
for as damaged. If the separator is dam-
aged, the local Taco representative should
be contacted for further instructions.
WARNING: DO NOT BRAZE PIPING TO THE NOSE OF THE VENT;
PERMANENT DAMAGE WILL OCCUR TO THE AIR VENT INTERNAL
PARTS.
INSTALLATION
TO BE INSTALLED BY PROFESSIONAL INSTALLERS ONLY
4900A – Air Separators
Taco 4900A series separators are designed for installation in hydronic
systems. The purpose of the 4900A separator is the removal of air from
the heating or chilled water system. In a heating system application the
separator should be mounted in the piping as close as possible to the exit
of the boiler and upstream of the pumps in the system. These units are
not designed to withstand external piping loads which may be transmit-
ted to the nozzles from the piping system. Should external piping loading
requirements be present, conrmation from Taco’s Design Engineering
department regarding the suitability of the separator’s design should be
obtained prior to installing this product. External piping must be supported
within the design of the external piping system.
When separators are installed, care should be taken to allow access to
the ASME name plates, air vent (located at the top of each separator),
ushing cock (located at the side of each unit) and drain plug (installed in
the bottom of each unit).
All piping to each separator should be installed full size, to match the ves-
sel’s connections, isolation valves on each side of the unit should be in-
stalled for future maintenance. The isolation valves are used during main-
tenance to reduce the loss of system uid.
See Warning under General section.
4900AD – Air and Dirt or Dirt (D) Separators with or without
Switchable On/Off Magnet
Installation notes from 4900A - Air Separators in previous paragraphs ap-
ply to 4900 Air and Dirt Separators as well. On 4900AD air and dirt sep-
arators the drain/blowdown valve located at the bottom of the unit should
be piped to drain. This connection should be piped with a full port shutoff
valve to a nearby drain during installation.
WARNING: FAILURE TO COMPLY WITH THESE
INSTRUCTIONS REGARDING THIS PRODUCT CAN
RESULT IN SERIOUS PERSONAL INJURY OR DEATH AND/
OR SEVERE PROPERTY DAMAGE.
DIAGRAM 1 – LOCATION OF TANK FITTINGS
SUPERCEDES: December 8, 2014 EFFECTIVE: September 15, 2015
4900 Series Air Separators
4900 Series Air and Dirt Separators
Installation, Operation & Maintenance Manual
402-080
GENERAL
All Taco 4900 series separators are designed and fabricated in
accordance with the ASME Code for Unfired Pressure Vessels,
Sect. VIII Div. 1.
Prior to shipment all separators are hydrostatically tested to 1.3
times their rated working pressure and accepted by an indepen-
dent insurance inspector.
Upon receipt of each separator, the shipping container should be
examined for external damage. If the shipping container has been
damaged in transit, the contents of the packaging should also be
examined prior to acceptance of the shipment. If the separator
appears to be damaged the shipment should be refused and or
signed for as damaged. If the separator is damaged, the local Taco
representative should be contacted for further instructions.
WARNING: DO NOT BRAZE PIPING TO THE NOSE OF THE
VENT; PERMANENT DAMAGE WILL OCCUR TO THE AIR
VENT INTERNAL PARTS.
INSTALLATION
TO BE INSTALLED BY
PROFESSIONAL INSTALLERS ONLY
4900A – Air Separators
Taco 4900A series separators are designed for installation in
hydronic systems. The purpose of the 4900A separator is the
removal of air from the heating or chilled water system. In a heating
system application the separator should be mounted in the piping
as close as possible to the exit of the boiler and upstream of the
pumps in the system. These units are not designed to withstand
external piping loads which may be transmitted to the nozzles from
the piping system. Should external piping loading requirements be
present, confirmation from Taco’s Design Engineering department
regarding the suitability of the separator’s design should be
obtained prior to installing this product. External piping must be
supported within the design of the external piping system.
When separators are installed, care should be taken to allow
access to the ASME name plates, air vent (located at the top of
each separator), flushing cock (located at the side of each unit)
and drain plug (installed in the bottom of each unit).
All piping to each separator should be installed full size, to match
the vessel’s connections, isolation valves on each side of the unit
should be installed for future maintenance. The isolation valves
are used during maintenance to reduce the loss of system fluid.
See Warning under General section.
4900AD – Air and Dirt or Dirt (D) Separators
Taco 4900AD series separators are designed for installation in
hydronic systems. The purpose of the 4900AD separator is the
removal of air and dirt from the heating or chilled water system. In
a heating system application, the separator should be mounted in
the piping as close as possible to the exit of the boiler and upstream
of the pumps in the system. These units are not designed to with-
stand external piping loads which may be transmitted to the nozzles
from the piping system. Should external piping loading require-
ments be present, confirmation from Taco’s Design Engineering
department regarding the suitability of the separator’s design
should be obtained prior to installing this product.
When separators are installed, care should be taken to allow access
to the ASME name plates, air vent (located at the top of each sepa-
rator), and flushing cock (located at the side of each unit). On
4900AD air and dirt separators the drain/blowdown valve located at
the bottom of the unit should be piped to drain. This connection
should be piped with a full port shutoff valve to a nearby drain during
installation.
All piping to each separator should be installed full size, to match
the vessel’s connections, isolation valves on each side of the unit
should be installed for future maintenance. The isolation valves
are used during maintenance to reduce the loss of system fluid.
See Warning under General section.
WARNING: FAILURE TO COMPLY WITH THESE INSTRUCTIONS
REGARDING THIS PRODUCT CAN RESULT IN SERIOUS PER-
SONAL INJURY OR DEATH AND/OR SEVERE PROPERTY DAMAGE.
SUPERCEDES: December 8, 2014 EFFECTIVE: September 15, 2015
4900 Series Air Separators
4900 Series Air and Dirt Separators
Installation, Operation & Maintenance Manual
402-080
GENERAL
All Taco 4900 series separators are designed and fabricated in
accordance with the ASME Code for Unfired Pressure Vessels,
Sect. VIII Div. 1.
Prior to shipment all separators are hydrostatically tested to 1.3
times their rated working pressure and accepted by an indepen-
dent insurance inspector.
Upon receipt of each separator, the shipping container should be
examined for external damage. If the shipping container has been
damaged in transit, the contents of the packaging should also be
examined prior to acceptance of the shipment. If the separator
appears to be damaged the shipment should be refused and or
signed for as damaged. If the separator is damaged, the local Taco
representative should be contacted for further instructions.
WARNING: DO NOT BRAZE PIPING TO THE NOSE OF THE
VENT; PERMANENT DAMAGE WILL OCCUR TO THE AIR
VENT INTERNAL PARTS.
INSTALLATION
TO BE INSTALLED BY
PROFESSIONAL INSTALLERS ONLY
4900A – Air Separators
Taco 4900A series separators are designed for installation in
hydronic systems. The purpose of the 4900A separator is the
removal of air from the heating or chilled water system. In a heating
system application the separator should be mounted in the piping
as close as possible to the exit of the boiler and upstream of the
pumps in the system. These units are not designed to withstand
external piping loads which may be transmitted to the nozzles from
the piping system. Should external piping loading requirements be
present, confirmation from Taco’s Design Engineering department
regarding the suitability of the separator’s design should be
obtained prior to installing this product. External piping must be
supported within the design of the external piping system.
When separators are installed, care should be taken to allow
access to the ASME name plates, air vent (located at the top of
each separator), flushing cock (located at the side of each unit)
and drain plug (installed in the bottom of each unit).
All piping to each separator should be installed full size, to match
the vessel’s connections, isolation valves on each side of the unit
should be installed for future maintenance. The isolation valves
are used during maintenance to reduce the loss of system fluid.
See Warning under General section.
4900AD – Air and Dirt or Dirt (D) Separators
Taco 4900AD series separators are designed for installation in
hydronic systems. The purpose of the 4900AD separator is the
removal of air and dirt from the heating or chilled water system. In
a heating system application, the separator should be mounted in
the piping as close as possible to the exit of the boiler and upstream
of the pumps in the system. These units are not designed to with-
stand external piping loads which may be transmitted to the nozzles
from the piping system. Should external piping loading require-
ments be present, confirmation from Taco’s Design Engineering
department regarding the suitability of the separator’s design
should be obtained prior to installing this product.
When separators are installed, care should be taken to allow access
to the ASME name plates, air vent (located at the top of each sepa-
rator), and flushing cock (located at the side of each unit). On
4900AD air and dirt separators the drain/blowdown valve located at
the bottom of the unit should be piped to drain. This connection
should be piped with a full port shutoff valve to a nearby drain during
installation.
All piping to each separator should be installed full size, to match
the vessel’s connections, isolation valves on each side of the unit
should be installed for future maintenance. The isolation valves
are used during maintenance to reduce the loss of system fluid.
See Warning under General section.
WARNING: FAILURE TO COMPLY WITH THESE INSTRUCTIONS
REGARDING THIS PRODUCT CAN RESULT IN SERIOUS PER-
SONAL INJURY OR DEATH AND/OR SEVERE PROPERTY DAMAGE.
INITIAL SYSTEM FILL
WARNING: Prior to the initial lling of the system the automatic air vent
installed in the top of the separator should be closed to prevent system
debris from fouling the venting mechanism. The automatic air vent may
be manually closed by turning the orice screw located in vent face
clockwise until seated. Additionally, the ushing cock installed on the side
of the separator should be opened to allow the air within the system to
exit during the system lling process. The ushing cock should be closed
when system uid rst appears to exit the separator from the ushing
cock.
Upon the completion of the system lling process the orice of the
automatic vent should be re-opened by turning the screw 1 to 1½ turns
counter-clockwise. Do not overturn the screw beyond 1 to 1½ turns.
4"
OPTIONAL
SWITCHABLE
ON/OFF
STYLE
MAGNET
USE SUFFIX
M, FOR EX.
4904ADM-125 SIDE VIEW
A Taco Family Company
2022
LIMITED WARRANTY STATEMENT
Taco, Inc. will repair or replace without charge (at the company’s option) any
commercial pump 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 form date of shipment (whichever occurs rst).
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 exam-
ination 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 addi-
tion of petroleum based uids 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 defec-
tive product or part. Taco reserves the right to make changes in details of
design, construction, or arrangement of materials of its products without
notication.
TACO OFFERS THIS WARRANTY IN LIEU OF ALL OTHER EXPRESS
WARRANTIES. ANY WARRANTY IMPLIED BY LAW INCLUDING WAR-
RANTIES 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 WARRAN-
TIES, EXPRESS OR STATUTORY, OR ANY OTHER WARRANTY OBLI-
GATION ON THE PART OF TACO.
TACO WILL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDI-
RECT 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 specic 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 in-
cidental or consequential damages, so these limitations or exclusions may
not apply to you.
MAINTENANCE
A regular inspection schedule should be adopted and carried out
by competent personnel to examine the pressure vessel for corrosion
and its cause, extent and possible arrest, to determine minimum metal
thicknesses, maximum metal temperatures, calculation of reduction in al-
lowable working pressure and to conduct hydrostatic tests. Also, defects
such as cracks, laminations and distortion of shell, heads or connections
should be noted and repaired if possible, after consultation with and ac-
ceptance by a commissioned authorized inspector who shall be involved
at all stages of any repairs or alterations of the ASME vessel.
In addition, the operation of the air vent, ush cock and drain valves,
and switchable on/off magnet (if installed) should be checked for proper
operation.
CAUTION: MAINTENANCE SHOULD ONLY BE UNDERTAKEN BY
PROPERLY TRAINED AND QUALIFIED PERSONNEL. NEVER OPEN
A VESSEL UNTIL THE SYSTEM PRESSURE IS OFF AND THE VES-
SEL HAS BEEN ISOLATED AND DRAINED. FAILURE TO FOLLOW
THESE INSTRUCTIONS MAY RESULT IN SERIOUS INJURY OR
DEATH.
The Taco automatic air vent located in the top of the air separator is
designed to prevent system uid or debris from fouling the venting mech-
anism. Periodically the ushing cock on the side of the separator should
be opened by qualied personnel in order to clean any system debris
which may have accumulated at the air/system uid interface beneath
the vent. CAUTION: MAINTENANCE SHOULD ONLY BE UNDERTAK-
EN BY PROPERLY TRAINED AND QUALIFIED PERSONNEL. CARE
SHOULD BE UNDERTAKEN WHEN OPENING THE FLUSHING COCK
AS SYSTEM FLUIDS MAY BE UNDER HIGH TEMPERATURE AND
OR PRESSURE. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY
RESULT IN SERIOUS INJURY OR DEATH. This procedure should only
be performed by properly trained personnel.
Systems where Air/Dirt or Dirt separators are installed should be period-
ically blow down by properly trained personnel to remove sand, dirt or
other system debris. The frequency of this cleaning is dependent upon
the nature of the system uid. Initially the system is blowdown after
the rst 12 hours of operation. Dependent upon the amount of debris
removed during the blowdowns process, subsequent blowdown should
be scheduled for a minimum of three minutes.
The blowdown process should be undertaken by trained personnel
only. CAUTION: MAINTENANCE SHOULD ONLY BE UNDERTAKEN
BY PROPERLY TRAINED AND QUALIFIED PERSONNEL. CARE
SHOULD BE UNDERTAKEN DURING SYSTEM BLOWDOWN AS
SYSTEM FLUIDS MAY BE UNDER HIGH TEMPERATURE AND PRES-
SURE. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT
IN SERIOUS INJURY OR DEATH.
Systems where Air/Dirt with the switchable on/off magnet or Dirt Sepa-
rators with the switchable on/off magnet are installed should follow the
same process for Air/Dirt or Dirt Separators except should consider pro-
hibiting system ow followed by turning the magnet handle from the On
to the Off position prior to performing the blow down to ensure magnetite
is released from the internal magnet sleeve. CAUTION: MAINTENANCE
SHOULD ONLY BE UNDERTAKEN BY PROPERLY TRAINED AND
QUALIFIED PERSONNEL. NEVER OPEN A VESSEL UNTIL THE SYS-
TEM PRESSURE IS OFF AND THE VESSEL HAS BEEN ISOLATED
AND DRAINED. 4900s with Switchable on/off magnet option contain 1 or
more high power magnet.
If loss of system uid is a concern, the separator should be isolated from
the system by closing the adjacent valves as needed. Residual pressure
within the separator should be reduced by slowly opening the factory
installed blowdown valve. Make-up water may be introduced through
the ushing cock located on the side of the separator to promote further
rinsing of the internals of the separator without wasting system uids.
THIS MAGNET SHOULD NOT BE REMOVED FROM
THE VESSEL WITHOUT CONSULTING THE FACTORY.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY
RESULT IN SERIOUS INJURY OR DEATH.
This manual suits for next models
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