AVG WATTS User manual

FUNCTION
Pressure reducing valves are
installed to reduce & stabilize
inlet pressure of mains water
supply and to allow domestic
water heaters and appliances
to operate properly.
INSTALLATION INSTRUCTIONS FOR
PRESSURE REDUCING VALVES
(PRV and NRI-PRV)
15mm, 20mm & 25mm
PRV TECHNICAL SPECIFICATIONS
Materials: Performance:
Body: DR Brass Pressure setting range: 250-750 kPa
Factory Setting: 500 kPa
Control Spindle: DR Brass Max inlet Pressure: 1600 kPa
Seat: Stainless Steel 316 Max working Temp.: 80 °C
Medium: Water
Complies with AS1357.2
Seals: EPDM Rubber Flow rate as per Appendix M @ 700 kPa dynamic
Strainer: Stainless Steel PRV15 set pressure 500 kPa Flow rate 60 L/Min
set pressure 250 kPa Flow rate 22 L/Min
Spring: Stainless Steel PRV20 set pressure 500 kPa Flow rate 130 L/Min
set pressure 250 kPa Flow rate 30 L/Min
PRV25 set pressure 500 kPa Flow rate 155 L/Min
set pressure 260 kPa Flow rate 25.4 L/Min
set pressure 750 kPa Flow rate 165 L/pm
A
B
CD
TM
WaterMark
MODEL NO. A B C D
PRV15F 68mm 22mm 78mm 34mm
PRV20F 68mm 22mm 78mm 34mm
PRV25F 70mm 25mm 83mm 38mm
PRODUCT RANGE
Pressure reducing valve sizes:
15mm (1/2”), 20mm (3/4”) &
25mm (1”)
MODELS:
PRV15F, PRV20F and PRV25F
Female BSP connections
MODELS:
NRI-PRV-15C &
NRI-PRV-20C
CxC connections.

NRI-PRV TECHNICAL SPECIFICATIONS
Materials: Performance:
Body: DR Brass Pressure setting range: 250-650 kPa
Factory Setting: 500 kPa
Control Spindle: DR Brass Max inlet Pressure: 1600 kPa
Seat: Stainless Steel 316 Max working Temp.: 80 °C
Medium: Water
Complies with AS1357.2
Seals: EPDM Rubber Flow rate as per Appendix K @ 700 kPa dynamic
Strainer: Stainless Steel NRI-PRV-15C
set pressure 500 kPa Flow rate 55 L/Min
set pressure 250 kPa Flow rate 22 L/Min
Spring: Stainless Steel NRI-PRV-20C
set pressure 500 kPa Flow rate 120 L/Min
set pressure 250 kPa Flow rate 30 L/Min
Leave this operating manual with the user
A
B
C
D
TM
WaterMark
MODEL NO. A B C D
NRI-PRV-15C 43mm 111mm 143mm 36mm
NRI-PRV-20C 43mm 111mm 146mm 36mm

IMPORTANT NOTE:
Flush out your lines to remove any debris or dirt particles that may cause the valve to
malfunction.
Installation
The pressure reducing valve must be installed by a licensed plumber and in accordance
with AS/NZS 3500, the Building Code, all relevant local requirements and the following
manufacturer’s instructions.
1. The pressure reducing valve may be installed horizontally or vertically.
2. ItisrecommendedthatisolationvalvesbettedeithersideofthePressurereducing
valve to assist future maintenance operations.
3. The PRV15, PRV20 and PRV25 are protected by an internal stainless steel mesh
lter.Ifthevalveisbeinginstalledinanenvironmentwherenedirtparticlesare
presentitisrecommendedthatalinestrainerbettedupstreamofthevalve.
4. Ensure that the valve is installed in an accessible position for future maintenance
operations.
5. Installthevalvewiththearrowonthevalvebodypointinginthedirectionofow.
For best operation the inlet pressure should be at least 150 kPa higher than the outlet
pressure.
Recommendations for installation
1. DonotinstallPRV’sbelowgroundunlessthevalveisttedinsideaprotectiveboxasto
prevent damage and corrosion by chemicals in the soil.
2. Iftheinstallationisatriskofwaterhammer,tawaterhammerarrestor.Ifthe
pressuresettingisimportantfortheprotectionofequipmenttapressurereliefvalve
downstream of the valve.
3. Multistorey Buildings - where multiple pressure reducing valves will be used as part of a
hydraulic circuit, consideration should be given to the design of the hydraulic circuit to
avoidtheoperatingconditionwherecombinedhighinletpressure/lowoutletow-rate
results in high water velocity within the Pressure Reducing Valve. Where inlet pressures
are likely to exceed 1,000 kPa, this may be achieved through staged pressure reduction
measures.
Installation Diagram
Manual Isolation Valve Pressure Reducing Valve
Line Strainer Manual Isolation Valve

Pressure Adjustment
The Pressure reducing valve has been factory set to 500kPa and has an adjustment range
of 250 - 750kPa.
To adjust the pressure:
1. Ensurethelineshavebeenushedandtheairpurgedfromthesystem.
2. Turnthewateroandrelievethepressurefromthesystem.
3. Removethetestpointpluglocatedontheoutletsideofthevalveandtyourtest
gauge.
4. Turn the water on and observe the gauge pressure.
5. Using a screw driver turn the screw clockwise to increase the pressure and anti-
clockwise to decrease the pressure.
6. During this process it may be necessary to open a tap on the line and allow water to
runandthenclosethetaptoconrmyouradjustment.Checkyourtestgaugeand
repeat if necessary.
7. Repeatsteps2and3andremovetestgaugeandre-ttestpointplug.
8. Make sure all joints are water tight and check for leaks.
Installation
The Pressure reducing valve must be installed by a licensed plumber and in
accordance with AS/NZS 3500, relevant local requirements and the following
manufacturer’s instructions.
Important Note
Flush out your lines to remove any debris or dirt particles that may cause the
valve to malfunction.
1. The pressure reducing valve may be installed horizontally or vertically.
2. It is recommended that isolation valves be fitted either side of the
Pressure reducing valve to assist future maintenance operations.
3. The PRV15 and PRV20 are protected by an internal stainless steel mesh
filter. If the valve is being installed in an environment where fine dirt
particles are present it is recommended that a line strainer be fitted
upstream of the valve.
4. Ensure that the valve is installed in an accessable position for future
maintenance operations.
5. Install the valve with the arrow on the valve body pointing in the direction
of flow.
For best operation the inlet pressure should be at least 150 kPa higher than the
outlet pressure.
Recommendations for installation
1. Do NOT install PRV’s below ground.
2. If the installation is at risk of water hammer, fit a water hammer arrestor.
3. If the pressure setting is important for the protection of equipment fit a
pressure relief valve downstream of the valve.
Installation Diagram
Pressure Adjustment
The Pressure reducing valve has been factory set to 500kPa and has an
adjustment range of 150 - 600kPa
To adjust the pressure:
1. Ensure the lines have been flushed and the air purged from the system.
2. Turn the water off and relieve the pressure from the system.
3. Remove the test point plug located on the outlet side of the valve and fit
your test gauge.
4. Turn the water on and observe the gauge pressure.
5. Remove the factory set pressure sticker located on top of the valve cover
and expose the adjustment screw.
6. Using a screw driver turn the screw clockwise to increase the pressure and
anti-clockwise to decrease the pressure.
7. During this process it may be necessary to open a tap on the line and
allow water to run and then close the tap to confirm your adjustment.
Check your test gauge and repeat if necessary.
8. Repeat steps 2 and 3 and remove test gauge and re-fit test point plug.
9. Make sure all joints are water tight and check for leaks.
Adjustment Diagram
Trouble Shooting
Reduced Flow Rate.
This problem is caused by a build up of foreign material on the gauze filter inside
the valve (see maintenance procedures)
The Pressure Reducing Valve does not maintain its set pressure.
This problem is caused by a build up of foreign material on the valve seat. This
prevents the valve from shutting off causing leakage with a resulting increase in
pressure down stream. (see maintenance procedures to clean or replace cartridge)
• Drain lines must have a continuous fall
Adjustment Diagram
CAUTION!
If the pressure reducing valve is not installed, commissioned and maintained properly in
accordance with the instructions contained in this manual, it may not operate correctly,
and cause damage to objects and or persons.
Disclaimer: Every care has been taken in the preparation of these instructions, which have been issued as a guide only. Compliance
with the requirements of local Authorities is required at all times. These requirements may change from time to time. Always be aware
of local requirements. Subject to any statutory obligations and manufacturers warranties no liability can be accepted for any losses,
consequential or otherwise which may arise or be said to have arisen from relying upon the contents of this installation instruction as to
thetnessofanyparticularproductforanyparticularpurpose,useorapplication.TheAustralianValveGroupPtyLtdreservestherightto
modifydesignsandspecicationsandtowithdrawandintroduceproductsatanytimewithoutnotice.
Leave this operating manual with the user
01/21
Unit 2, 9-11 Noble St, Kewdale, WA, 6105
Tel: 1800 AVG AUS (284 287) Fax: [phone]
www.avg.net.au