Kohler 32E User manual

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32E
E
Installer: This manual is the property of the customer
and must be retained with the product for maintenence
and operational purposes.
Product Manual

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32E
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32E BSP

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320 F
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32E
RADA 320 C
185 mm
49 mm
49 mm59 mm
127.5 mm
61 mm
41.5 mm
256 mm
314.5 mm
Ø83.5 mm
RADA 320 OEM
137 mm
Ø83.5 mm
185 mm
49 mm
49 mm
117 mm
32E BSP

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RADA 320 CF 118.5 mm
185 mm
49 mm
49 mm
108 mm
Ø83.5 mm
320 F

81290447-W2-B
Rada 32E
A suitable range is 16-37°C. Generally, temperatures higher than 37°C may cause
chemical interactions with the skin and result in further damage. At 16°C and below
hypothermia becomes a concern. Consulting a safety/health advisor will be a helpful
aid in the determination of the best temperature parameters. No two hazards are
exactly the same and each should be evaluated on a case-by-case basis".
Point of Use
Rada 32E Thermostatic Mixing Valves are suitable for installation at or near a point
potential for simultaneous operation.

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Rada 32E
Rada 32E is a Thermostatic Mixing Valve of “sealed for life” disposable cartridge construction.
For Emergency Drench Showers - The Rada 32E will pass a specied minimum of 76
litres per minute (l/min) and will ow a minimum of 38 l/min from direct cold water supply in
hot failure mode at 2.7 bar (40 psi) maintained equal inlet supply pressure.
For Emergency Eye Wash Stations - For single or multiple xture installation, the Rada 32E
will control accurately at ow rates from 76 to 8 l/min.
In ow applications between 76 and 38 l/min, the Rada 32E will pass approximately 50% of
original ow setting in hot failure mode.
In ow applications between 38 and 19 l/min, the Rada 32E will pass approximately 80% of
original ow setting in hot failure mode.
In ow applications below 19 l/min, the Rada 32E will pass approximately 95% of original
ow setting in hot failure mode.
Operational Specications
1. Site Adjustable—Mechanical maximum-temperature limit stop and single-temperature
locking features as a function of the temperature control handle design.
2. Thermal shutdown feature is designed to protect user from unsafe water temperatures
or hot water/chemical reaction should cold supply be interrupted during use.
3. Unique constant cold water ow design ensures that in the event of a hot supply failure
the Rada 32E will allow cold water to ow to xture.
4. Unique constant cold water ow feature allows the inlet hot water supply to be set within
a prescribed range, thus limiting the potential outlet temperature to a safe maximum in
the event of misadjustment, unauthorized tampering or thermostat failure. This feature
presumes that the correct initial commissioning was performed and that the cold water
supply has not been interrupted.
Technical Specications
• 32E - 1” BSP Female or 28 mm Compression
• 32E BSP - 3/4” BSP Male
• Chrome-plated DZR brass/polymer construction
• Operating pressures must be nominally equal
Maximum: 6.9 bar*
Minimum: 2.7 bar drench showers, 1.4 bar eye wash
• Integral replaceable cartridge-type inlet check valves
• Dual thermostatic elements
• Integral replaceable inlet strainers
• 38 LPM constant cold water ow in hot failure mode to open outlet at 2.7 bar pressure
drop
*High water pressures may deliver a volume and spray force that are injurious to the user.
Check with xture manufacturer or regulate water pressures within acceptable range.

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Safety Warnings
The function of a Thermostatic Mixing Valve is to deliver water consistently at a pre-designated
temperature.
Rada Thermostatic Mixing Valves are precision engineered to give continued superior and
safe performance provided:
1. They are installed, commissioned, operated and maintained in accordance with the
recommendations provided and accepted plumbing practices.
2. Periodic attention is given, as necessary, to maintain the product, the accessory ttings
and the plumbing system in good functional order.
In keeping with every other mechanical product, Rada Mixing Valves should not be considered
as functionally infallible and, as such will never totally replace the vigilance and attention of
maintenance, supervisory and safety staff. Provided that they are installed, commissioned,
operated and maintained, the risk of product failure and its associated consequences, if not
eliminated, are reduced to the minimum achievable.
Rada 32E Operating Specications
Maximum Hot Water Supply Temperature *70°C
Minimum Cold Water Supply Temperature 1°C
Minimum Flow Rate at mid blend with nominally equal supply pressures. 8 l/min
Maximum Flow Rate 120 l/min
Maximum Dynamic Inlet Supply Pressure (supplies must be nominally equal) 6.9 bar
MAximum Static Pressure 10 bar
Minimum Inlet Supply Pressures 2.7 bar Drench Shower
1.4 bar Eye Wash
Important! To ensure continued safe operation of this product, it should be checked and
maintained (see servicing and maintenance section). In addition All 'Critical Components'
must be changed every 5 years, irrespective of supply and usage conditions or the evidence
of in-service tests. However, when supply conditions or usage patterns do not conform to the
recommended operating parameters the cartridge may need to be replaced more frequently
in line with appropriate risk assessments.
Critical components are Cartridge Assembly pt. no. 1812.007 and inlet service pack 1847.232
or 1847.233 where applicable.
*Note! For optimum performance it is recommended that the maximum hot water temperature
is limited to 65°C.
Caution! During thermal disinfection the mixing valve can operate up to 85°C for short
periods ensure safety precautions are followed during discharge. Chemical disinfection agents
e.g. chlorine/chloramines combined with higher temperatures will affect the life of the product
adversely and could detrimentally affect the thermostatic performance, to ensure continued
safe operation refer to ‘Safety’ Critical components.

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Rada 32E Installation
The Rada 32E Thermostatic Mixing Valve must be installed as per the Installation Schematic.
1. The Rada 32E should be installed in a horizontal position.
2. The Rada 32E must be installed in a standard HOT-LEFT/COLD-RIGHT inlet supply
conguration. There are red(hot) and blue(cold) markings on each valve.
3. Be sure to thoroughly ush the pipework before tting the Rada 32E.
4. Do not expose the Rada 32E or any of its ttings to extreme temperatures.
5. The Rada 32E is serviced from the front of the valve as you face it. A minimum
180 mm clearance in front of the Temperature Control Handle is suggested for internal
parts access.
6. The Rada 32E is pre-set at the factory to a 25°C Blend outlet temperature. The RADA
32E MUST NOT BE TEMPERATURE ADJUSTED ON-SITE.
7. The Rada 32E is designed to control a single drench shower or combination drench
shower/eye wash station.
8. The Rada 32E is designed to control a single eye wash station.
Multiple eye wash stations can be controlled by a single Rada 32E as long as the potential
multiple simultaneous demand does not exceed valve capacity.
9. Ensure that the inlet supply pressures are nominally equal.
Caution! High water pressures may deliver a volume and spray force which is injurious to the
user. Check with xture manufacturer or regulate water pressures within acceptable range.
Warning! Correct on site commissioning of Rada 32E is critical.
Warning! The constant cold water ow design ensures that in the event of a hot water supply
failure the Rada 32E will allow cold water to ow to the xture.
In addition, Rada 32E is designed to shutdown the hot water supply in the event of a cold
water supply failure.
These features will only function if:
1. There is a minimum of 20°C differential between the Hot Supply and the Blend set point
25°C.
2. The Rada 32E has been factory set to deliver a maximum temperature at 25°C. It is
critical to note that under certain inlet temperature supply conditions, the constant cold
water supply feature may give the false impression that a blend set point has been
correctly established. However, the blend temperature may just be a function of the
combination of inlet hot water temperature and the constant cold water ow.
Important! The valve may actually be inadvertently set to deliver temperatures well in excess
of the set point but it is unable to do so due to the constant cold water ow. In this situation
the cold water failure safety shutdown has been compromised.

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6.0 mm
3.0 mm
a
b
1
3.0 mm
6.0 mm
2
6.0 mm

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3
32E
Install the connections
32E BSP 320 F

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4
1 min
5
3.0 mm

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32E
Install the pipework
a
32E BSP
b

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c
732E shown. The rest of the installation procedure is similar for all variants of the 32 valve.
320 F

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8
Commissioning the Rada 32E
Commissioning must be carried out in accordance with these instructions, and must
be conducted by designated, qualied and competent personnel.
Temperature Checking
The blend temperature obtainable through the mixing valve should be limited to prevent
selection of a ushing temperature that is too hot.
The Rada 32E is fully performance tested and then pre-set at the factory to a 25°C blend
outlet temperature. TEMPERATURE SHOULD NOT BE ADJUSTED.
Check that an adequate supply of hot water is available at the hot inlet of the mixing valve.
For optimum performance the minimum temperature of the hot water must be at least 20°C
above the blend.
Validate The Commissioning
It is important that the commissioning is validated. Proceed as follows:
1. Operate the xture(s) at full ow and take a temperature reading. Water temperature
should not uctuate more than 4°C. If water temperature control is unsatisfactory, refer
to “Fault Diagnosis”.
2. Operate the xture(s) at full ow and intentionally “fail” the hot water supply to the Rada
32E. Cold water should continue at a reduced ow rate. Conrm that the cold water ow
rates meet the specications. If cold water does not ow, refer to “Fault Diagnosis”.

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3. Operate the xture(s) at full ow and intentionally “fail” the cold water supply to the Rada
32E. All ow through the xture should shut off completely within 2 seconds. If ow does
not shut off to specication, refer to “Fault Diagnosis”.
Servicing and Maintenance
Rada 32E Thermostatic Mixing Valves must be inspected and tested on a regular basis. We
recommend preventative maintenance procedures based on individual site conditions must be
employed to ensure continued and safe operation of the valve, for example site conditions such
as water with high mineral content may dictate an increased frequency. In lieu of any guidance
we would recommend at least 6 monthly checks be conducted to include the following – For
optimum performance and safety repeat steps 1-3 of the commissioning. Record and
report any variations to the Plant Management and the Plant Safety Ofcer. Annually we
recommend minimum changing Filters, oval seals on inlets of cartridge. See 'safety section'
for critical component replacement information.
Note! All seals are pre-lubricated. If further lubrication is required, use only silicone based
lubricants on this product. Do not use petroleum based lubricants.
The Rada 32E Thermostatic Mixing Valve is of non-serviceable single “cartridge construction”.
The cartridge can be removed from the valve for inspection or replacement by rst removing
the temperature control handle using a 3 mm hex wrench. The hub assembly may inadvertently
remain attached to the inside of the temperature control handle. This is a “push t” and can
be “levered” out using a thin blade screwdriver or pliers.
Warning! The Rada 32E has a specially designed replacement cartridge.
Important! Do not install a replacement cartridge which does not have the 32E identier.
The Temperature Indicator Ring, which ts beneath the temperature control handle can be
“levered” off using a suitable thin edged tool.
Before proceeding further be sure to isolate the valve by turning off each inlet supply.
The complete cartridge assembly is accessed by rst removing the 6 retaining screws and
then smoothly drawing the cartridge out. Do not twist or apply “side load” leverage when
extracting the cartridge.
When installing a new or reinstalling an existing cartridge note the raised “H” on the hot inlet
of the cartridge and align to hot supply accordingly.
Important! After re-installing a replacement cartridge, the Rada 32E must be re-commissioned
and validated.
Warning! The Rada 32E Cartridge Assembly is non-serviceable. Do not attempt to dis-
assemble the cartridge or tamper with the factory settings beyond those detailed in this
product manual.

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2
Maintenance Procedure - Cartridge Replacement
1
4
56
Identication Label Fixed Here
WARNING!
This cartridge is only suitable for use
with the 32E Emergency Shower
at low blend temperatures 25˚C
or below. Do not use in any other
product.
F17170/1 Kohler Mira Limited, Jan 2017
F17170_1 32E Warning Label.indd 1 09/01/2017 09:04:11

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7
8
WARNING!
This cartridge is only suitable for use
with the 32E Emergency Shower
at low blend temperatures 25˚C
or below. Do not use in any other
product.
F17170/1 Kohler Mira Limited, Jan 2017
F17170_1 32E Warning Label.indd 1 09/01/2017 09:04:11
Important! Do not remove hub when tting the spare cartridge. Temperature Factory preset
must not be adjusted
Identication Label Fixed Here
WARNING!
This cartridge is only suitable for use
with the 32E Emergency Shower
at low blend temperatures 25˚C
or below. Do not use in any other
product.
F17170/1 Kohler Mira Limited, Jan 2017
F17170_1 32E Warning Label.indd 1 09/01/2017 09:04:11