Kohler rada 320 Manual Del Producto página 8

en
Make sure that the item is installed by a competent installer.
Shut off the main water supply.
Observe all local plumbing and building codes.
Provided that the thermostatic mixing valve is installed,
commissioned, operated within the specification limits and
maintained according to this Manual, the risk of malfunction,
if not eliminated, is considerably reduced.
The use of the word 'failsafe' to describe the function of a
thermostatic mixing valve is both incorrect and misleading.
In keeping with every other mechanism it cannot be
considered as being functionally infallible.
Malfunction of thermostatic mixing valves is almost always
progressive in nature and will be detected by the use of
proper temperature checking and maintenance routines.
Certain types of system can result in the thermostatic
mixing valve having excessive 'dead-legs' of pipework.
Others allow an auxiliary cold water supply to be added to
the mixed water from the mixing valve. Such systems can
disguise the onset of thermostatic mixing valve malfunction.
Ultimately, the user or attendant must exercise due diligence
to ensure that the delivery of warm water is at a stable, safe
temperature. This is particularly important in such healthcare
procedures as supervised bathing of patients unable to
respond immediately to unsafe temperatures.
Care is required when making any adujustments to flow or
temperature, make sure that the temperature is suitable
and has stabilised.
Specification
Pressures
Minimum Dynamic Supply Pressure: 0.1 bar (10 kPa)
Maximum Dynamic Pressure: 8 bar (800 kPa)
Maximum Supply Static Pressure: 10 bar (1000 kPa)
Maximum pressure loss ratio*: should not exceed 10:1 in
favour of either supply during flow.
Maximum pressure loss: inlets to outlet is 5.6 bar (560 kPa),
which equates to maximum 120 l/min flow rate at mid blend.
Note! Pressure loss is the pressure drop between the inlets
and the outlet of the mixing valve when flow is taking place.
* Pressure Loss Ratio is determined by subtracting the
resistance of the outlet pipework and outlet fittings from
the dynamic pressures of the hot and cold water at the
inlets of the mixing valve. This is at its extreme when the
mixing valve is used at its lowest flow-rate and when the
maximum inequality occurs in the pressure of the hot and
cold water supplies.
1245185-W2-D
General
Safety
Connections
320 IC - Inlets & outlet connections: 28mm compression.
320 IF - Inlets & outlet connections: 1" BSP female thread.
320 F - Inlet & outlet adaptors 1" BSP female thread.
320 M - Inlet & outlet adaptors 3/4" BSP male thread.
Temperature
Minimum Cold Water Temperature: 1°C - 25°C
Maximum Hot Water Temperature: 70°C
Factory Preset Outlet Temperature: 43°C
Optimum Thermostatic Control Range: 35°C - 50°C
Flow Rates
Minimum Flow Rate: 6 l/min at mid blend with nominally
equal supply pressures.
Maximum Flow Rate: 120 l/min
Troubleshooting
Only hot or cold water from outlet
a. Inlet supplies reversed (i.e. hot supply to cold inlet).
Check.
b. Check filters and inlet fittings for blockage.
Fluctuating or reduced flow rate
a. Check filters and inlet / outlet fittings for flow restriction
(check isolators are fully open).
b. Ensure that minimum flow rate is sufficient for supply
conditions.
c. Ensure that dynamic inlet pressures are nominally
balanced.
d. Ensure that inlet temperature differentials are sufficient.
No flow from mixing valve outlet
a. Check inlet isolators are fully open.
b. Check filters and inlet / outlet fittings for blockage.
c. Hot or cold supply failure.
Maximum blend temperature setting too hot or too cool
a. Indicates incorrect temperature setting.
Important! This is only a quick guide to allow for initial
installation & commissioning. We recommend you
review the full instructions available on our website
www.radacontrols.com for further general information,
fault diagnosis and critical maintenance.
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