24
10
MAINTENANCE
10.1
Pressure Vessel
The pressure vessel should be checked once every 12 months to have its pre-
charge checked or replenished, this should be carried out as follows:
1.
Isolate pump electrically.
2.
Remove the front cover.
3.
Isolate the water supply by closing the appropriate isolating valves.
4.
Release system water pressure by opening an outlet on the system.
5.
Check pre-charge at Schrader valve (Figure 17) using a tyre pressure
gauge.
6.
Replenish pre-charge by injecting air into the vessel via the Schrader
valve using a car or bicycle pump (Figure 17).
7.
Close all system outlets, open inlet and outlet isolating valves.
8.
After maintenance is completed refer to Section 11 - Commissioning for
instructions on re-starting pump.
Model
Pre-charge bar (psi)
iMatic
The pressure vessel pre-charge must be set to 90% of the
pump set pressure. I.e. If pump pressure is set to 3 bar, then the
pre-charge value should be 3 x 0.9 = 2.7 bar (39 psi).
10.2
Water Scale
In areas of hard water, scale can cause the mechanical pump seal to stick if left
without use for long periods. The pump must be run for at least 5 minutes every
four weeks to “exercise” all working parts. See Section 13 - Technical Specification
for note on water temperature.
10.3
Water Quality
The iMatic has been manufactured to the highest standard from WRAS approved
materials.
As with any stored volume of water; in order to ensure that the water remains fit
for use the water temperature needs to remain below 20
o
C. The quality of stored
water will deteriorate with time and temperature. Bacterial growth is dependent
on the water temperature, growth rates will be higher when the conditions are
warm.
If the water remains unused for long periods of time, the tank should be drained
and flushed through. The tank should be cleaned on an annual basis to protect
against bacterial growth. If the iMatic is installed in a rental property, it must be
maintained in line with current Health & Safety regulations.
