13
OPERATION
For models with knob fitted for adjustable temperature control, adjustment of blend
temperature from preset maximum to cold is achieved by clockwise rotation of the
knob.
For models with locked temperature control, no user adjustment is intended.
Control of flow is via separate outlet valve(s), refer
Flow Control
.
Commissioning Checks
(Temperatures should always be recorded using a thermometer with proven
accuracy).
-
Check inlet pipework temperatures for correct function of checkvalves.
-
Operate the outlet flow control and check:
1.
Flow rate is sufficient for purpose.
2.
Temperature(s) obtainable are acceptable.
3.
All connections and mixer body are water tight.
-
It is advisable to establish a performance check at this time, which should be
noted for future reference as part of a Planned Maintenance Programme (a
Maintenance Record Card has been provided with this Manual).
The procedure should be chosen to imitate both typical and difficult operating
conditions, such as any supply pressure fluctuations that may be likely. An
ideal method is to locate another outlet on the common cold water supply close
to the mixing valve (operating this outlet may cause a drop in supply pressure),
and subsequently have a temporary effect on blend temperature (should be no
more than 2
o
C change).
Note!
Causing thermal shutdown of the mixer by full closure of the cold supply may
not adequately indicate the practical capability of the mixer, nor its service condition.
Consequently this is not a recommended performance check, and repeated such
testing may ultimately affect service life.