Metos PROVENO E, Инструкция по установке и эксплуатации, Страница: 58 / 72

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PROVENO E
Rev. 1.2 (24.08.2016) Installation
5.4.1. Icebank connections (C3 option)
The location of the connection points of an external icebank appears from the installation drawing.
Icebank in: R1/2” inner thread. The icebank must be fi tted with a solenoid valve to stop the fl ow of coo-
ling water after cooling has ended.
Icebank out: R3/4” inner thread.
5.4.2. Water connection and quality requirements
• The unit must be connected to the cold and warm water supply and, if fi tted with a twin water con-
nection option (T), also to the soft water supply.
• All water supply lines must be fi tted with a one-way valve and a shut-off valve (not included in deli-
very).
• Before connection to the unit all water lines must be thoroughly rinsed from all loose particles.
• The water pressure range for optimum performance is 250 - 600 kPa.
• The minimum water pressure allowed for proper function of the unit is 250 kPa. If the pressure is
lower, a pressure rise pump must be fi tted by the customer.
• The minimum water fl ow rate is 5 l/min, however, if optimum cooling capacity is required, the cold or
soft water fl ow rate must be at least 20 l/min.
• All water connections are of size Ø15mm (R 1/2”).
• Water conductivity should be below 1000μS/cm. Already when the conductivity is over 500μS/cm, a
water analysis is recommended.
• Maximum chloride concentration allowed is less than 60 mg/l.
• Maximum chlorine concentration allowed is less than 0,2 mg/l.
• The pH value of the water should be between 6,5 and 9,5.
• Unit damages caused by chloride, chlorine or pH values exceeding the stated limits are not covered
by manufacturer warranty.
5.4.3. Optional twin water connection (T) for soft water
If fi tted with a twin water connection this connection supplies softened water for fi lling of the kettle
jacket, and if fi tted with water-based cooling also for the cooling.
5.4.4. Extreme water conditions
When extreme water conditions not fulfi lling the requirements above exist, fi lters and water treatment
devices should be installed in order to ensure proper function of the unit and avoid corrosion. When
extreme water conditions are at hand, a water quality analysis must be carried out. Depending on the
results of the analysis, needed fi lters and water treatment devices are installed by the customer. The
most common fi lters and treatment equipment are:
The optional twin water connection should also be utilized when extreme water conditions not fulfi lling
the requirements above exist. This lowers the consumption of treated water, because raw water can be
used for cleaning purposes. Filters and water treatment devices should be installed in order to ensure
proper function of the unit and avoid corrosion. When extreme water conditions are at hand, a water
quality analysis must be carried out. Depending on the results of the analysis, needed fi lters and water
treatment devices are installed by the customer. The most common fi lters and treatment equipment are:
1. Particle fi lter
A 5-15μm particle fi lter is recommended when water contains sand, iron particles or other suspended matters.
2. Active carbon fi lter
An active carbon fi lter must be used if the chlorine level exceeds 0,2 mg/l.