enware AQUABLEND 2500 User manual

Part No. IS127
AQUABLEND 2500
25MM THERMOSTATIC
MIXING VALVE
For use in Australia
Call 1300 369 273
www.enware.com
Enware Australia Pty Limited
9 Endeavour Rd Caringbah NSW 2229 Australia
Ph: [phone] Fax: [phone]
I00045_Aug _16

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Aquablend 2500 Thermostatic Mixing Valve
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Contents
Introduction 2
Warranty 3
Safety 5
Product Range 5
Physical Description 6
Recommended Pressures & Temperatures 7
Flow Sizing Graph 8
Technical Description 9
Installation 10
Commissioning of the valve 12
Maintenance and servicing 15
Fault Finding 18
Spare Parts 20
Enware reserves the right to change any product specication or information
contained in this publication, at any time and without notice. Every care
has been taken to ensure accuracy in the Preparation of this publication
which has been issued for guidance only. No liability can be accepted for
any consequences which may arise as a result of its application. Enware =
trade mark of Enware Australia Pty Limited - A.C.N. 003 988 314
Aquablend TMV’s are exclusively manufactured for Enware Australia Pty Limited by
Reliance Worldwide, 27-28 Chapman Place, Eagle Farm, Qld, 4009 Australia.

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Aquablend 2500 Thermostatic Mixing Valve
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Introduction
The ENWARE AQUABLEND 2500 Thermostatic Mixing Valve
is a high performance Thermostatic Mixing Valve suitable for a
wide range of applications. The valve is designed to comply with
AS4032 - Thermostatic Mixing Valves. The mixing valve has the
following features:
• Complies with the requirements of AS4032 -
Thermostatic Mixing Valves,
• Provides high stability of mixed water temperature even
under changing inlet conditions,
• Ensures rapid shut down of mixed outlet ow in the
event of hot or cold water supply failure,
• Designed for quick and simple in-situ servicing,
• Suitable for installation into AS3500 compliant systems
with hot water temperature as low as 55°C
• Fitted with a Tamper Resistant temperature adjustment
mechanism.

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Warranty
The ENWARE AQUABLEND 2500 Thermostatic Mixing Valve is
guaranteed free from manufacturing defects for a period of 24
months, subject to the conditions outlined below:
Enware Product Warranty
Subject to the warranty conditions and exclusions set out below
ENWARE valves are warranted to be free from defects in material
and/or workmanship for a period of 24 months service life and if
found by ENWARE to be so defective will be replaced as set out
below. If the valve is sold by a party other than ENWARE then it
is sold by that seller as principal and the seller has no authority
from ENWARE to give any additional warranty on behalf of
ENWARE.
The benets of this warranty are in addition to all other rights
and remedies which the purchaser may have under the Trade
Practices Act (Cwth) or similar laws of each State and Territory
in Australia.
Warranty Conditions:
1. The valve must have been installed by a licensed plumber
in accordance with the ENWARE Installation Instructions and
Application Guidelines supplied with the valve, and in accordance
with the National Plumbing and Drainage Code AS3500 (the
Code) current at the date of installation and all relevant statutory
and local requirements in the State or Territory in which the valve
is installed.
2. Where the valve is installed outside the boundaries of a
metropolitan area as dened by ENWARE, the cost of transport
insurance and travelling shall be the purchaser’s responsibility.
(Refer to the ENWARE scale of fees for replacement of valves).
3. Where the valve comprises part of a hot water system,
installation of that system must be in accordance with its
manufacturer’s recommendations, the Code and all relevant
statutory and local State or Territory requirements.
4. The valve must be returned to ENWARE with a fully & correctly
completed ENWARE Warranty Claim Form.

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5. Where the valve is replaced under warranty the replacement
valve carries a new warranty as detailed herein.
Warranty Exclusions:
Replacement work will be carried out as set out in the ENWARE
Warranty above, but the following exclusions may cause the
warranty to become void, and may incur a service charge
including cost of parts where:
6. Damage has been caused by accident, Acts of God, misuse,
incorrect installation of the hot water system of which the valve
forms a part or attempts to disassemble the valve.
7. It is found that there is nothing wrong with the valve.
8. The failure of the valve is due in part or in whole to faulty
manufacture/installation of the hot water system of which the
valve forms part.
9. The valve has failed directly or indirectly as a result of
excessive water pressure or temperature outside the Application
Guidelines, thermal input or corrosive environment.
10.The valve has failed due to foreign matter either from
installation or the water supply.
11.The failure of the valve is due to scale formation in the
waterways of the valve.
12.The failure of the valve is due in part, or in whole, to installation
not in conformance with the requirements of the Code.
13.ENWARE reserves the right to change its specications
without prior notice and will not accept liability for any claim
arising from such change.
14.Subject to any statutory provisions to the contrary, claims for
damage to furniture, carpets, walls, foundations or any other
consequential loss either directly or indirectly due to leakage
from the valve are also excluded from warranty cover.
TM = Trademark of
Enware Australia Pty Limited (ENWARE)
9 Endeavour Road, Caringbah NSW 2229
© All rights reserved 1996

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Aquablend 2500 Thermostatic Mixing Valve
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Safety
The ENWARE AQUABLEND 2500 Thermostatic Mixing Valve
is a high performance valve designed to give stable and
dependable operation, provided it is installed, commissioned,
operated and maintained as per the recommendations outlined
in this manual. It should be noted however that this valve should
not be considered as an alternative to adequate supervision and
duty of care during its use and operation.
Note: When installed, the mixing valve, inlet controls, pipework
and the surrounding area may become hot, which may cause
burn injuries. Precautions should be taken to ensure that these
surfaces cannot cause such injuries.
Product Range
The ENWARE AQUABLEND 2500 Thermostatic Mixing Valve
is available complete with inlet service ttings. The inlet to the
ttings is 3/4” BSP female, the outlet from the valve is 1” BSP
male. The service ttings consist of isolating ball valves, strainers,
pressure test points and non-return valves. The strainers can be
serviced and cleaned without disturbing the installation (refer to
Maintenance & Servicing Pg 15).
The inlet service ttings also incorporate union type ttings
enabling the thermostatic mixing valve to be removed from its
installation without disturbing its pipework.
The ENWARE AQUABLEND 2500 Thermostatic Mixing Valve is
also available without inlet ttings as an option.
The schematics and dimensions of these valves with their
corresponding order codes are shown in below.
Figure 1.1
AQUABLEND
2500 – CHROME
FINISH
With 3/4” Female
Thread Inlet
Fittings – Dry
Weight 3.0kg
ATM725

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Physical Description
Figure 1.2 located below shows a general arrangement drawing
of the ENWARE AQUABLEND 2500 Thermostatic Mixing
Valve showing the method of operation. Hot and cold water is
supplied to each side of the valve respectively. The hot water
enters through a port below the piston, the cold water enters
above the piston. Upon entry the water begins to blend and
enters the mixing tube. At this point the mixed water contacts the
thermostatic wax element. The element will extend or contract to
match the water temperature it is exposed to causing the piston
to move, thereby regulating the amounts of hot and cold water
entering the valve. This maintains the mixed water temperature
at a constant temperature.
If for instance the inlet hot pressure dropped, the ow of hot water
into the valve would be reduced. Therefore the element would
see mixed water at a reduced temperature. This would cause the
element to contract. This would move the piston downwards as
to close off more of the cold port restricting cold ow therefore
opening more of the hot port and hence reducing the cold ow
rate. This has the effect of the valve attempting to restore itself to
its original temperature setting.
Similarly if the hot inlet temperature dropped, the element would
again see blended water at a lower temperature and therefore
the element would again contract reducing the cold port piston
gap and hence supply more hot water and less cold. Once again
the valve attempts to restore itself to its original setting. This will
occur for all changing conditions including changes to ow rate,
inlet temperatures and inlet pressures.
In the event of a sudden loss of the cold water supply the piston
will shut off the hot port thus stopping any ow through the valve.
The valve will also shut down the cold supply if there is a hot
water failure.
Figure 1.2
General
Arrangement
Drawing

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Recommended Pressures & Temperatures
MIXED OUTLET TEMPERATURE
Temperature Adjustment Range 35°-50°Celsius
INLET TEMPERATURES
Cold Supply Minimum 5° Celsius
Maximum 30° Celsius
Hot Supply Minimum 55° Celsius
Maximum 90° Celsius
Hot to Mix Temperatures
Differential for Stable
Operation
Minimum 10° Celsius
Cold to Mix Temperatures
Differential for Stable
Operation
Minimum 5° Celsius
FLOW RATES
To ensure stable outlet
conditions Minimum 6 litres/minute
Maximum 85 litres/minute
DYNAMIC INLET PRESSURES
Hot & Cold Inlet Pressures Minimum 10kPa
Maximum 500kPa
STATIC INLET PRESSURES
Hot & Cold Inlet Pressures Maximum 1000kPa
INLET PRESSURE RATIO
Maximum inlet pressure ratio for stable
operation. (Hot : Cold or Cold : Hot)
5:1 (either
supply)
NOTE: For optimum operation it is recommended that the hot & cold
water supply pressures be balanced to within +/- 10%.
NOTE: Notwithstanding the above, compliance with AS3500 must be
maintained.

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Flow Sizing Graph
The ENWARE AQUABLEND 2500 Thermostatic Mixing Valve is
suitable for many applications. The Headloss Characteristic for
Mixed Outlet Flowrate versus Balanced Inlet Pressure is shown
Graph 2.1 below. It is important that the valve is not oversized
for its intended application.
HEADLOSS CHARACTERISTICS OF AQUABLEND 2500
with Inlet Fittings
(with mix temperature at 42°C at Valve Outlet)
Pressure Drop
(Balanced Inlet Pressure) - kPa
Graph 2.1 - Headloss Characteristics
Note: To ensure optimum performance the minimum outlet ow
of the mixing valve during operation should be at least
6 litres/minute.
It is important that the valve is sized such that the ow rates
from the outlets are not less than those listed in AS3500.1. The
pipework between the valve and the system must be sized in
accordance with AS3500.1 to ensure the water velocity in the
pipework is within allowed limits.
If the valve is to be installed and operated under unequal inlet
pressures then it is the lower inlet pressure that will determine the
outlet ow rate. However, for optimum performance and stability
it is recommended that the valve is installed with balanced
dynamic inlet pressures (+/- 10%).
Mixed Outlet Flowrate - Litres per minute

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Aquablend 2500 Thermostatic Mixing Valve
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Technical Description
THERMOSTATIC ELEMENT
(PART No. ATMS306)
PISTON ASSEMBLY
(PART No. ATMS303)
& PISTON O-RING*
INLET FITTING
O-RING (PART
No. ATMS302)
INLET CONTROL
VALVE STRAINERS
(PART No. ATMS305)
ANTI-THERMOSYPHON
DEVICE (INSIDE
INLET VALVE)
INLET CONTROL
VALVE - 2 OFF
* AVAILABLE IN O-RING KIT (PART No. ATMS301)
MIXING
VALVE BODY
FACE SEAL
(PART No. ATMS313)
SEAT SHELL WITH SEAT
(PART No. ATMS308) &
1 CARTRIDGE O-RING*
RETURN SPRING
(PART No. ATMS311)
PRESSURE TEST
POINT PLUG
(PART No.ATMS314)
MIXED WATER
TEMPERATURE
ADJUSTER
(PART No. ATMS310)
& SPINDLE O-RING*
LOWER TOP CAP
(PART No. ATMS309)
& 2 CARTRIDGE
O-RINGS*
ALLEN KEY
(SUPPLIED)
LOCK NUT & TOP COVER
(PART No. ATMS304)
CARTRIDGE COMPLETE
(PART No. ATMS3002)

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Installation
The ENWARE AQUABLEND 2500 Thermostatic Mixing Valve
should be installed to conform with AS3500, Code of Practice
and legislation applicable to each state and following the details
outlined in this section.
The ENWARE AQUABLEND 2500 must be installed by a
licensed plumber, or where applicable, a licensed plumber who
has undertaken T.A.F.E. training in Thermostatic Mixing Valves.
Note: To effectively control microbial hazards during system
design, installation, commissioning and maintenance the
requirements outlined in AS/NZS3666-2003 and local legislation
shall be adhered to.
The inlets on the valve are clearly marked. The Hot Inlet is
indicated by a red identication ring on the inlet and the
Cold Inlet by a blue identication ring.
If the valve is not installed correctly then it will not function
correctly and may put the user in danger. It may also void the
warranty of the valve.
Prior to the installation of the valve the system must be checked
to ensure that the system operating conditions fall within the
recommended operating range of the ENWARE AQUABLEND
2500 as detailed in Reccomended Pressures & Temperastures
Pg 7. If the hot water supply temperature is greater than 85°C
the valve may be damaged. A suitable temperature limiting
valve must be tted to the hot water supply, prior to the inlet
ttings, if the temperature of the hot water will rise above 85°C.
This temperature limiting valve must be installed as per the
manufacturers instructions. It is also important that both of the
inlet dynamic supply pressures are 500kPa or less. If either
supply pressure exceeds 500kPa then a suitable pressure
reducing valve must be tted prior to the inlet control valve to
reduce the pressure to an acceptable limit. These pressure
reducing valves must be installed as per the manufacturer’s
instructions. In order to achieve optimum performance from the
valve it is recommended that the inlet pressures are balanced to
within 10% of each other.
The water quality conditions should be checked to ensure they
do not exceed the limits as listed in AS3500, Section 1.6 If they
do exceed these limits then it will be necessary to install a water
softener or water treatment device.

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To ensure that the mixing valve operates correctly it is
necessary that the pipework is thoroughly ushed with
clean water before the valve is installed. This will remove
any physical contaminants from the pipework, ensuring
trouble-free operation. During the ushing procedure care
should be taken to prevent water damage occurrng to the
surrounding area.
It is required by AS3500.4 that “Each thermostatic mixing valve
shall have an isolating stop tap/valve, line strainer & non-return
valve tted to the hot and cold water supply lines”. The inlet
ttings supplied with each TMV will ensure this requirement is
met. If the ENWARE AQUABLEND 2500 Thermostatic Mixing
Valve is to be installed without the supplied inlet control valves
then it will be necessary to install a separate isolating valve, non-
return valve and strainer to both inlets to the valve. Strainers
must be tted to prevent any particulate contamination from
entering the valve. These strainers should be 60 Mesh stainless
steel. Isolating valves are required so that the water supply to the
valve can be isolated in the event that servicing is required. Non-
return devices must also be tted to both the hot and cold inlets
to prevent cross-connection.
Ensure that the test plugs in the top of the inlet ttings are tight.
The 4mm Allen key for adjusting the temperature can be used to
tighten the test plugs.
The valve should be installed so it can be accessed easily for
maintenance or servicing. The pipework to and from the valve
must not be used to support the weight of the valve. Saddle clips
or pipe support brackets must be used to mount the inlet control
valves and TMV rmly to a wall or rigid support structure. If the
inlet control valves are not used then a suitable support bracket
or saddle is required to support the weight of the valve. This is to
ensure that the pipework is not under load from the valve.
The valve can be installed in a wall cavity, under a basin or on a
wall, however it is essential that the mixing valve and inlet ttings
are easily accessible for servicing.
During installation or servicing, heat must not be applied
near the mixing valve and inlet ttings during installation
or servicing as this will damage the valve and inlet ttings
internals. Failure to comply with this requirement will damage
the valve and ttings. It will put the user at risk, and it will void the
warranty of the valve.

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Commissioning Of The Valve
Upon completion of the installation, the valve should be tested
and commissioned as per the procedure outlined below or as
specied by the local authority. The entire procedure should be
read through thoroughly prior to the commissioning of the valve.
A calibrated digital thermometer having rapid response time with
maximum temperature hold, large at bladed screwdriver and
4mm Allen key (supplied with the Thermostatic Mixing Valve) will
be required to check and set the outlet mixed temperature of the
valve.
Figure 3.1 Schematic
Installation Diagram

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• Ensure all outlets that will be serviced by the valve have
adequate warning signs posted to ensure that no outlet is used
during commissioning.
• Open the cold supply line to the valve, then open the hot supply
line, ensuring there are no leaks.
• Open the outlet that is serviced by the shortest length of pipe
work between the mixing valve and outlet xture.
• Allow the mixed outlet to ow for at least 60 seconds to allow
the temperature to stabilise before taking a temperature reading
at the outlet with a digital thermometer. The ow rate should be
at least 4L/min. The ow rate can be checked with the aid of a
known size container and a stopwatch. The temperature should
be taken at the closest outlet served by the thermostatic mixing
valve.
• If the outlet temperature requires adjustment the followings
steps are required;
Temperature Adjustment
1. Remove the chrome locking nut from the top of the mixing
valve with a large at bladed screwdriver. The white cover can
then be removed.
2. Insert the supplied 4mm Allen key into the adjusting spindle.
To increase the mixed outlet temperature rotate the spindle
anti-clockwise as shown below in Figure 3.2.
To decrease the mixed outlet temperature, rotate the
spindle clockwise as shown below in Figure 3.2
The detail of this adjustment is printed on the valve body,
underneath the plastic top cover. These details can be accessed
by removing the plastic top cover.
3. Allow the mixed outlet temperature to stabilise for 60 seconds
and once again take a temperature reading. Repeat the procedure
until the desired temperature has been reached.
4. Replace the plastic top cover and t the chrome locking nut to
the top of the valve with the at bladed screwdriver, ensuring that
the locking nut is fastened tightly.
5. Check that the outlet temperature is stable over the full range of
ow rates and that the ow rate is adequate for the application.
6. Close the outlet.
7. The mixing valve is now set and locked.

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Figure 3.2 Increasing and Decreasing Mixed Water Temperature
Shut Down Test
• Now that the mixing valve has been set & locked it’s
necessary to perform a shut down check. Allow the mixed
water temperature to stabilise & note the outlet temperature.
While holding a digital thermometer in the outlet ow, quickly
isolate the cold water supply to the valve. The outlet ow should
quickly cease owing. As a rule of thumb the ow should be less
than 0.1L/min following the isolation. Monitor maximum outlet
ow temperature, & record this on the Commissioning Report
(Appendix A). The temperature should not exceed that allowed
by the applicable standard or code of practice for each state.
Restore the cold water supply to the valve. After the mixed
water temperature has stabilised note the outlet temperature
ensuring the outlet temperature has re-established.
• Now repeat the above test, except this time quickly isolate
the hot water supply to the valve. The outlet ow should
quickly slow to a trickle. As a rule of thumb the trickle should
typically be less than 0.4L/min@500kPa down to less than
0.1L/min@100kPa following the isolation. Restore the hot
water supply to the valve and measure and record the outlet
temperature after the mixed water temperature has stabilised
ensuring the outlet temperature has re-established.
• Ensure that all details of the Commissioning Report are
completed & signed and a copy of this report should be kept
with the installer & owner of the premises.
• The valve is now commissioned and it can be used within
the technical limits of operation.
REMOVE THE LOCKNUT
& TOP COVER WITH A
FLAT BED SCREWDRIVER
ALLEN KEY
SUPPLIED
HOT
COLD

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UPPER/LOWER TOP CAP
WRENCHING FLATS
(2 FLATS)
Maintenance and Servicing
The ENWARE AQUABLEND 2500 Thermostatic Mixing Valve will
only require minimal preventative maintenance work to ensure it
operates at its optimum level of performance. The valve should
be commissioned and serviced annually, unless the installed
conditions dictate more frequent servicing is necessary.
Annual Maintenance Procedure
Every 12 months the ENWARE AQUABLEND 2500 should be
serviced and cleaned. The external surface of the valve should be
given a light wipedown. The valve & surrounding area should be
inspected for leaks or water damage and action taken if required.
The valve is to be disassembled as detailed in Figure 4.1 ,4.2
and 4.3 below. In order to service the valve, an O-ring Kit, Part
No. ATMS301 will be required, prior to disassembling the valve.
Ensure a clean dry work area is available. Open the replacement
service kit and lay all parts out neatly. Firstly isolate the hot and
cold supplies to the mixing valve by closing the inlet ball valves.
Remove the inlet tting top cover with a suitable spanner and
then remove the mesh strainer. The strainers should be cleaned
with a dilute water solution of suitable descaling solvent (such as
CLR), checked for physical damage and then thoroughly rinsed
with clean water. The strainers can then be re-installed into the
valve, and the top cover replaced and tightened to a maximum
torque of 15Nm into the inlet valve bodies.
The non-return cartridges can be cleaned by ushing the inlet
service ttings with clean water. This can best be done by
removing the valve from the inlet service ttings and ushing
water up the pipework through
the inlet ttings and into a
bucket or similar, ensuring
that the surrounding areas are
protected from water damage.
Remove the chrome locking
nut from the top of the mixing
valve with a large at bladed
screwdriver. Removal of the
Figure 4.1
Removing the Inlet Strainers

16
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white plastic cover will expose the mixed water temperature
adjuster, a set of octagonal wrenching ats & 2 wrenching ats.
Using the 2 wrenching ats only, undo the cartridge & remove
from the valve body, as per Figure 4.2. Thoroughly clean the
internals of the valve body using a dilute water solution of suitable
descaling solvent and rinse with clean water, taking care to prevent
scratching or damaging the O-ring bores.
UPPER/LOWER TOP CAP
WRENCHING FLATS
(2 FLATS)
SEAT SHELL WITH SEAT
WRENCHING FLATS
Figure 4.3 Cartridge Disassembly
Examination of the lower and upper portions of the cartridge will
reveal a set of wrenching ats. Using the wrenching ats provided
remove the Seat Shell With Seat from the Upper/Lower Top Cap
assembly. This is shown below in Figure 4.3.
UPPER/LOWER TOP CAP
WRENCHING FLATS
(2 FLATS)
Figure 4.2 Cartridge Removal
Extreme care must be taken when separating these two
sections to ensure that parts are not lost or personal injury
occurs as the cartridge is spring loaded. (Safety glasses
should be worn during this operation). Remove the piston
assembly. During valve servicing it is not necessary to
disassemble and separate the piston assembly.
NOTE: Do not disassemble the Upper/Lower Top Cap
assembly.

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Remove the mixed water temperature adjuster mechanism by
rotating clockwise. Refer to the exploded view on page 9
Remove the o-ring from the Piston Assembly, the o-ring from the
Mixed Water Temperature Adjuster, and the 3 Cartridge o-rings
from the Seat Shell and Lower Top Cap.
Cleaning of all parts can be done using descaling uid. Care
must be taken to ensure that the black PTFE coating on the
piston, the black rubber seat and thermostatic element are not
damaged. The replacement O-rings for the spindle and piston
can now be tted. These are the two smallest O-rings. An O-ring
template, facilitating easy identication of the O-rings, is shown
below in Figure 4.4.
Adequately grease each O-ring with a potable water approved
silicon-based lubricating grease (such as Clare FU-5) before
retting the O-rings. Ret the mixed water temperature adjuster.
Place the thermostatic element (The thermostatic element is to
be replaced every 5 years) inside the piston assembly and ret
into the upper cartridge portion. Place the spring inside the lower
portion of the cartridge and screw the upper and lower cartridge
parts together. The threads should be started by hand to prevent
any chance of cross-threading. Tighten the assembly to a torque
of 10 to 15Nm..
The 3 cartridge O-rings can now be tted, making sure that
they are adequately greased with a potable water approved
silicon-based lubricating grease (such as Clare FU-5) on each
O-ring. The cartridge can then be retted back into the body and
tightened to a torque of 10 to 15Nm.
The valve must then be recommissioned as per Commissioning
Of The Valve page 12, including temperature adjustment and the
shut down test.
Figure 4.4
O-ring Template
CARTRIDGE O-RING PISTON O-RING
3 OFF1OFF
SPINDLE O-RING
1 OFF

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Fault Finding
FAULT /
SYMPTOM
CAUSE RECTIFICATION
The desired
mixed water
temperature
cannot be
obtained or
valve is difcult
to set.
• Hot and cold
supplies are tted
to the wrong
connections.
• Valve contains
debris.
• Strainers contain
debris.
• Non-return devices
are damaged
• Top Cap and/or
Piston O-rings are
damaged
• Ret the valve with Hot/
Cold supplies tted to the
correct connections.
• Clean the valve ensuring
that all debris is removed
and components are not
damaged.
• Clean strainers
ensuring debris is
removed.
• Check non-return device
is not jammed.Clean it if
necessary.
• Check Top Cap & Piston
O-rings for damage.
Replace if necessary.
The valve will
not shut down
• The hot to mix
temperature
differential is not
10°C or greater.
• The piston O-ring is
damaged.
• Rubber sealing
seat is damaged or
fouled by debris.
• Thermostatic
element has failed.
• Raise hot water
temperature.
• Replace piston O-ring.
(ATMS301)
• Clean seat using mild
descaling solution.
• Replace element.
(ATMS306).
Mix
temperature
unstable
• Debris is fouling
valve.
• Flow rate below
6L/min.
• Strainers are
fouled.
• Clean the valve ensuring
that all debris is removed
and components are not
damaged.
• Rectify any pressure
deterioration.
• Clean strainers.
Mix
temperature
changing over
time
• Inlet conditions
(pressures or
temperatures) are
uctuating.
• Strainers contain
debris
• Install suitable pressure
control valves to ensure
inlet conditions are within
those stated in Section 5.
• Clean strainers ensuring
debris is removed