26
Maintenance Procedures
Maintenance must be carried out in accordance with these instructions, and must be
conducted by designated, qualified and competent personnel. This mixing valve is
designed for minimal maintenance under conditions of normal use. External surfaces
may be wiped clean with a soft cloth, and if necessary, a mild washing-up type detergent
or soap solution can be used.
Warning!
many household and industrial cleaning products contain mild abrasives
and chemical concentrates, and should
not
be used on polished, chromed or plastic
surfaces.
Should an internal malfunction occur then this will probably require cartridge renewal.
The Thermostatic, flow and checkvalve cartridges contain no user-serviceable parts,
and must not be dismantled. Components are precision-made, so care must be
taken while servicing to avoid damage.
When ordering spare parts, please state product type, i.e. Rada Exact-3 or Exact-3
z, and identify part name and number (refer to the
PARTS LIST
). A Service pack is
available, containing all the seals and strainer screens that may be necessary for
renewal during maintenance or servicing.
Maintenance personnel should also ensure that the user's staff are aware of the
importance of reporting temperature variations and that when detected, these should
be recorded in the log.
Training
It is recommended that the user maintains a log of the in-service tests described herein,
together with a record of any service work carried out and the replacement of critical
components. It is also recommended that any maintenance personnel sign the user
log in respect of all thermostatic mixing valves examined on each attendance at the
user's premises.
Refer to 'Recommended content of Maintenance Log' on page
31.
Thermostatic Mixing Valve Performance Records
(Log Book)
Temperature Testing (Between In-Service Tests)
Check and record warm water temperature regularly to confirm correct operating
performance of the valve. In health care applications such as hospitals, aged
persons facility, nursing homes etc. such checks must be made at least every month.
More regular temperature checks should be made where increased risks are perceived
such as where patients are unable to immediately respond to an increase in water
temperature by either shutting the water off or removing themselves from the contact
with the water. Records of warm water temperature checks should be included in a log
book.Temperature Testing.