Metos 40E - Water Connection, Electrically Heated Models; Water Connection, Steam Heated Models

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35
VIKING / VIKING COMBI
Rev. 2.0 (1.8.2017)
Installation
6.3.2. Water connection (electrically heated models)
The water connection is to be done according to the installation drawing. Connections to the water tap
are to be fi tted with one-way and shut-off valves (not included in delivery). The cold water connection is
of size Ø 15 mm (G 1/2”) and the warm water connection of size Ø 10 mm (G 3/8”).
Quality requirements for water used for fi lling the steam generator.
• 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.
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 water quality for steam generator fi lling. Specifi ed
water quality is a mandatory requirement for proper function of the unit and for avoidance of 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.
3. Reverse osmosis system
A reverse osmosis system must be used if the chloride concentration exceeds 60 mg/l. This is very cru-
cial in order to avoid corrosion.
4. Water softener
If a high level of scale build-up is experienced, a water softener is needed. H+ Ion Exchanger or
Kleensteam are recommended systems. Sodium ion exchangers must not be used because of problems
caused by high salt content.
6.3.3. Water connection (steam heated models)
The water connection is to be done according to the installation drawing. Connections to the water tap
are to be fi tted with one-way and shut-off valves (not included in delivery). The cold water connection is
of size Ø 15 mm (G 1/2”) and the warm water connection of size Ø 10 mm (G 3/8”).