HeatGuardTM - RMC Water Control Valves

HeatGuardTM - RMC Water Control Valves
Part No. IS275
Rev A
- 09584
- 09584
HeatGuard
INSTALLATION INSTRUCTIONS
Certified Product
TM
Australian
Standard
AS4032.2 Lic. No. 1593
SAI-Global
CONTENTS
Choosing the correct model . . . . . . . . . 3
How to install the valve . . . . . . . . . . . . 4
How to set the desired temperature . . . . 6
Installation diagrams . . . . . . . . . . . 7-11
Valve specifications . . . . . . . . . . . . . . 12
Insulation . . . . . . . . . . . . . . . . . . . . . 16
Troubleshooting . . . . . . . . . . . . . . . . 17
Maintaining the valve . . . . . . . . . . . . 19
1
Failure to comply with all aspects of these
instructions may result in unsafe performance. All
installations must comply with AS/NZS 3500 and
any State or Local Authority requirements.
2
CHOOSING THE CORRECT MODEL
Ensure you have chosen the correct model HeatGuard for the
application.
Standard model:
HeatGuard
High Performance model:
Low Pressure model:
(blue cap)
HeatGuard Ultra
(orange cap)
HeatGuard Solar HF
(orange cap)
For instantaneous systems, use ONLY HeatGuard Ultra
For low pressure systems, use ONLY HeatGuard Solar HF
Do not use ANY HeatGuard model on steam-supplied
systems.
CHECKING SITE PARAMETERS
Check site parameters against the specifications of the chosen
valve. If the site conditions are outside those specified for the
valve, they must be rectified prior to installing the valve.
3
HOW TO INSTALL THE VALVE
• It is recommended the valve be installed as close as possible
to the hot water system, however it may be fitted anywhere
on the hot water supply pipe if necessary.
• If the valve is fitted at the point-of-use there must be a
minimum one (1) metre pipe run between the valve and the
outlet fixture.
• Insulation is provided with this valve. Insulation must be fitted
in situations where freezing is a possibility.
4
STEP 1
Flush the system thoroughly before fitting HeatGuard.
It is CRITICAL that all debris is flushed from the
pipework prior to installing the valve. Not flushing the
system properly is the most common cause of
difficulties.
STEP 2
If the water supply is of poor quality so that the valve’s
strainers will continue to block, fit an additional filter
or strainer to the system.
STEP 3
Install HeatGuard in accordance with the installation
diagrams in this booklet. Do not use excess thread
sealant as this may cause the valve to fail.
STEP 4
Set the valve at the desired temperature by following
the instructions on Page 6.
STEP 5
Enter installation details on sticker provided, and affix
near system.
• Valve MUST NOT be subjected to heat during installation as
this may damage the valve internals.
• It is recommended that isolating valves be fitted to allow easy
access to the valve if the strainers need to be cleaned.
• In situations where the hot pressure may exceed the cold
pressure and on pumped ring main systems, non-return valves
MUST be fitted to BOTH inlets.
ABOUT SUPPLY PRESSURES
Tempering valves provide optimum performance when installed
with hot and cold supplies of equal dynamic pressure, i.e.
pressure under flow conditions. (The static supply pressures
often give NO indication of the dynamic supply pressures). It is
recommended that the hot and cold supplies to each tempering
valve be delivered via pressure control valves. In most domestic
installations it should be possible to fit one control valve at the
property boundary to control pressure to the whole site. For
commercial installations it is recommended to fit a pressure
control valve on each inlet to the tempering valve.
5
HOW TO SET THE DESIRED TEMPERATURE
• Every valve must be commissioned on-site to ensure correct
delivery of the desired mixed water temperature, as
installation conditions can vary from site to site.
• Prior to commissioning the valve the hot water system must be
switched on and delivering hot water at a minimum of 60°C.
STEP 1
Locate the nearest outlet being supplied by the valve.
STEP 2
Open the outlet to allow a flow rate of at least four
(4) litres/minute.
STEP 3
Allow the water to run for at least one minute to
ensure the mixed water temperature has settled.
STEP 4
Using a thermometer, check the mixed water
temperature.
Is desired temperature achieved?
6
Yes? – go to Step 7.
No? – go to next Step.
STEP 5
Adjust the valve as shown in Diagram 4 on page 15
until desired mixed outlet temperature is achieved.
STEP 6
Repeat Steps 1-4.
STEP 7
Replace the cap.
For Controlled Pressure Water Heater: Domestic Building
- Valve fitted at the Heater -
INSTALLATION DIAGRAMS
7
8
Where there is no Pressure Reducing Valve controlling the whole installation (*), it is
recommended that the cold supply to the tempering valve be controlled by a Pressure
Limiting Valve (**) of the same pressure setting as the valve supplying the water heater.
For Controlled Pressure Water Heater: Domestic Building
- Valve fitted remotely from the Heater -
9
For Solar Water Heater: Domestic Building
10
For Heat Exchange Water Heater: Domestic Building
11
It is recommended that Pressure Reducing Valves are installed for each valve to ensure
any pressure fluctuations from the pumped supply or other source are minimised prior
to supplying water to the tempering valves.
There MUST be non-return valves fitted to BOTH hot and cold inlets for this type of
installation. Easily accessed, fully serviceable strainers (in addition to the strainers
supplied with the Tempering Valve) should be installed on each floor or circuit.
For Pumped Supplies, Multiple Valves: Commercial Building
VALVE
SPECIFICATIONS
VALVE SPECIFICATIONS
Cold water supply temperature:
5°C – 30°C
Hot water supply temperature:
60°C – 90°C
1
Optimum outlet temperature range:
40°C – 50°C
2
Set temperature
Must be commissioned
on site to achieve desired
outlet temperature
Accuracy of outlet temperature:
±3°C - tested to
AS4032.2
between 40°C and 50°C
Minimum temperature differential
15°C
Supply pressure, static:
1600kPa maximum
Supply pressure, dynamic:
500kPa maximum
(between hot supply and outlet temperature):
3
Supply pressure imbalance, dynamic: 2 : 1 maximum
4
(at time of commissioning)
Maximum permitted pressure
variation in either supply, in order
to control outlet temperature to ±3°C: ±10% maximum
(from supply pressure at commissioning)
Minimum flow rate:
12
4 litres/min
5,6
Notes:
1. AS/NZS 3500.4 Clause 1.9.1 requires the minimum hot water storage
temperature to be 60°C.
2. For applications outside the requirements of AS/NZS 3500 and AS4032.2, it
is possible to set the valve as high as 55°C or as low as 35°C, depending on
site conditions
3. This is the minimum difference required to ensure shut-off of outlet flow in the
event of cold supply failure in accordance with AS4032.2, providing the
valve is set between 40°C and 50°C.
4. The maximum permitted ratio of supply pressures, under dynamic (flow)
conditions. For optimum performance it is recommended that the hot and
cold pressures at commissioning are as close as possible to equal.
5. The maximum permitted variation in either supply pressure from the pressure
at commissioning in order to control the outlet temperature to ±3°C.
6. Note that rapid changes in supply pressure can result in a spike in the outlet
temperature beyond ±3°C. Following a rapid change in supply pressure it
may take a number of seconds for the temperature to return to within a ±3°C
limit. Steps should be taken on-site to eliminate any cause of rapid supply
pressure variation.
DIAGRAM 1 – FLOW CHARACTERISTICS
20mm
Pressure Loss (kPa)
15mm
Flow Rate (litres/min)
13
DIAGRAM 2 – DIMENSIONS
Model
14
A
B
C
D
E
HeatGuard 15
121
58
37
107
61
HeatGuard 20
140
58
37
61
DIAGRAM 3 – FITTING CONFIGURATION
HeatGuard 15
HeatGuard 20
DIAGRAM 4 – TEMPERATURE ADJUSTMENT
TURN ANTI-CLOCKWISE TO
INCREASE TEMPERATURE
TURN CLOCKWISE TO
REDUCE TEMPERATURE
15
INSULATION
16
PROBLEM
3. Either full hot or full
cold water flowing
from outlet fixture
2. Mix temperature
unstable or changing
over time
1. The desired mixed
water temperature
cannot be obtained or
valve is difficult to set.
POSSIBLE CAUSE
• Hot/Cold water has
migrated to other inlet.
Refer also to point 1.
• Hot and cold supplies are
reversed.
• Inlet temperatures may have
altered due to seasonal
temperature variations.
• Strainers contain debris.
• Fluctuating supply pressures.
• Strainers contain debris.
• Valve contains debris.
• Hot and cold supplies are
reversed.
• Inlet temperatures are not
within specified limits
SOLUTION
• Refit the valve with
Hot/Cold supplies fitted to
the correct connections.
• Check non-return valve is
not fouled. Clean if
necessary.
• Install pressure reducing
valves.
• Clean strainers, ensuring
debris is removed.
• Reset valve. (See Page 6.)
• Ensure inlet temperatures
are within the specified
limits for the valve.
• Refit the valve with
Hot/Cold supplies fitted to
the correct connections.
• Flush water through valve
and clean non-returns and
strainers.
• Clean strainers, ensuring
debris is removed.
TROUBLESHOOTING
17
18
• Refit the valve with
Hot/Cold supplies fitted to
the correct connections.
• Clean non-returns and
strainers, ensuring all
debris is removed.
Flush valve.
• Reduce water velocity (best
achieved by fitting a
pressure reducing valve).
• Hot and cold supplies are
reversed.
• Non-return valves fouled by
debris.
• Water velocity above
velocity requirements of
AS3500.1
6. Mixed water
temperature does not
change when
temperature adjuster is
altered
7. Hot water flows into the
cold water system or
vice versa
8. Valve is noisy
• Fluctuating supply
pressures.
• Check valve and inlet
fittings for blockages.
Clean or flush as
necessary.
• Install pressure reducing
valves.
• Inlets fouled by debris.
5. Flow rate reduced or
fluctuating
SOLUTION
• Restore inlet supplies and
check mix temperature.
• Clean strainers and
non-returns, ensuring all
debris is removed.
Flush valve.
POSSIBLE CAUSE
• Hot or cold water supply
failure.
• Strainers are blocked by
debris.
PROBLEM
4. No flow from the valve
outlet
TROUBLESHOOTING (continued)
MAINTAINING THE VALVE
• We recommend the valve is checked annually to ensure its
continued function. For installations with poor or unknown
water quality, or other adverse supply conditions, it may be
necessary to check the valve more frequently.
• The temperature should be checked at the same outlet as was
used for commissioning in the first instance (refer to the
installation sticker). If the temperature is more than 2°C from
the commissioning temperature or outside the requirements of
AS/NZS 3500.4, refer to Troubleshooting guide on page 16.
• The strainers and non-return valves can be easily accessed for
cleaning via the union connections.
• The valve itself cannot be serviced. If the valve fails it must be
replaced. Do not disassemble the valve other than to remove
the snap-on cap, strainers and non-return valves as shown.
19
NOTES
4
NOTES
4
CUSTOMER SERVICE:
Phone: 1800 810 803
Fax: 1800 062 669
www.relianceworldwide.com.au
www.rwc.com.au
Reliance Worldwide Corporation (Aust.) Pty. Ltd.
ABN 71 004 784 301
© All Rights Reserved 2016
Reliance Worldwide, a division of GSA Industries (Aust.) Pty. Ltd.
ABN 71 004 784 301
© All Rights Reserved 2012
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