Disinfection Procedure - Pentair VH200 Owner's Manual

3.2 Disinfection Procedure

UV disinfection is a physical disinfection process and does not add any potentially harmful chemicals to the water. As UV
does not provide a disinfection residual, it is imperative that the entire distribution system located after the UV be chemically
disinfected to ensure that the plumbing system is free from any bacteriological contaminants. The disinfection process must
be performed immediately after the UV unit is installed and repeated thereafter whenever the UV is shut down for service,
without power, or inoperative for any reason. The procedure for sanitizing the plumbing system is readily accomplished as
follows:
1
• Ensure the controller is
plugged in for entire
disinfection process.
5
2
1
2
2
• Re-install the housings.
• Turn on the cold water supply.
• Open each faucet and all
water openings until you
smell the bleach and then
close the faucets.
Notes: 1) The addition of chlorine (bleach) to a hot water tank that has in the past been fed with untreated raw water with
high levels of other contaminants (iron, manganese, hydrogen sulphide, organics, etc.) will result in oxidation
of these contaminants and may require repeated flushing of the hot water tank. This contingency must be dealt
with independently under the start-up procedure for any other conditioners that may form a part of the pre-
treatment for the UV unit.
2) The above disinfection procedure will result in a massive chlorine residual far in excess of the 0.5 to 1.0 mg/L
typically present in municipally chlorinated water and of a magnitude consistent with the minimum 50 mg/L
chlorine solution recommended for the disinfection of distribution systems known to be contaminated. Do not
consume water until complete system has been flushed.
3) As the monitored systems include a 254nm UV intensity monitor, note that the introduction of the bleach
solution required for disinfection will trigger a temporary low UV condition. This is due to the fact that the bleach
physically "clouds" the raw water. Once the bleach runs through the system, the alarm condition will return to
normal. During this sanitization process, the audible alarm condition on the controller can be temporarily
deferred by pressing the "RESET" switch for 5 seconds. By doing this, the audible alarm will be silenced. The
system will display
manually reset as outlined on page 10 of this manual.
2
2
2
2
• Shut off the water supply.
• Close each faucet.
6
2
1
2
2
• Turn on the hot water supply.
• Open each faucet and all
water openings until you smell
the bleach and then close the
faucets.
on the controller LED. This condition will remain for 12 hours unless the system is
3
1
2
• Remove filter cartridge(s).
7
1
30 mins
2
2
• DO NOT use water for 30
minutes.
• Flush the system until no
chlorine smell is detectable
and reinstall the filters.
4
1
• Pour 2 cups of household
bleach solution into the filter
housing(s).
Note: DO NOT use Hydrogen
Peroxide.
8
2
• Reinstall filter cartridge(s).
Installation
2
x2
9