o
To ensure continuous protection,
UV LAMP MUST BE REPLACED ANNUALLY
. After 1
year of use, it will no longer provide effective disinfection even though it stays lit.
o
USE ONLY
GENUINE
RAINFRESH UV LAMPS.
Use of non-Rainfresh UV lamps can
result in unsafe drinking water and will void your product warranty.
(see page 8 for details)
(C) WATER QUALITY REQUIREMENTS
The unit should only be operated with water that meets the following minimum criteria:
o
Tannins and Colour:
Water with tannins or colour has low UV transmittance that reduces UV system performance.
UV Transmittance of the water should be > 85%.
Caution: The UV system will not work if the water has tannins or
colour
.
A tannin-removal system should be installed for proper disinfection.
o
Hardness:
Less than 7 GPG (120 mg/L). Hard water causes scale build-up on the quartz dome which will reduce the
UV transmittance through the dome and result in reduced performance. The UV system will work with hard water for
a short time after which the scale build-up on the quartz dome will cause reduced disinfection performance (unsafe
condition). It is therefore recommended that, for hard water, a water softener should be installed prior to the UV
system (see Fig 2).
o
Iron & Manganese:
Iron less than 0.3 PPM (mg/L) and Manganese less than 0.05 mg/L is desirable. At higher
concentrations, a suitable water conditioner (e.g. an Iron Filter or Greensand filter) should be installed prior to the UV
system to prevent iron build-up on the quartz dome that can cause insufficient disinfection.
o
Turbidity/Suspended Solids:
Ideally less than 10 NTU (Nephelometric Turbidity Unit). If the water has high turbidity,
a back-washable sediment filter is recommended as a pre-filter.
We highly recommend a water test to confirm that your water quality is suitable for UV disinfection. Rainfresh can test
your water quality at no charge. For details, go to www.rainfresh.ca or call Rainfresh.
(D) INSTALLATION
INSTALLATION NOTES AND CAUTIONS
o
This system must be installed in accordance with local and provincial regulations.
o
The MEGA8 System is designed for installation on the cold water line only at the point of entry (POE). For installation
in the Province of Quebec, install the unit to serve a max of 2-3 outlets only, but not serving majority of the premises.
o
NOTE:
Provide a minimum clearance of 2 feet above the unit for lamp replacement
.
o
The system requires a constant power supply of 120V AC.
o
It is strongly recommended to have a
dedicated electrical circuit
for the UV system.
A CSA or equivalent certified
surge protector must be installed
to protect the ballast from electrical surges
. We recommend surge protector
rated for a clamping voltage of less than 400 Volts, response time of less than one nanosecond, and energy
absorption of at least 600 Joules.
o
The MEGA8 system is designed for maximum water flow rate of 8 US GPM (30 liters per minute). If higher flow rates
exist occasionally, it is recommended that an 8 US GPM flow restrictor (Rainfresh model FR8K) be installed so that the
water does not exceed the max system flow rate.
o
The system should be installed indoors in a protected area where the temperature does not fall below 4°C (40°F).
o
It is highly recommended to install
bypass piping
with unions and a shut-off valve around the unit. This way you can
still have water in case you need to remove the system for service.
o
Use only Teflon tape for all connections. Do not use any other sealant on the threads.
3