Convotherm OEB 10.10, Manual

Page: 46 / 115

4. Water connection
42
EN
4.1 Water inlet
Water connection position, see point (A, B)
in connection plan.
•
A water flow plan can be found on the
inside of the motor cover.
•
Unit must be connected to a cold water
supply of drinking water quality. Note
label on water inlet.
•
Find information on water quality and
water hardness at your local water
supply company.
•
Before carrying out the water
connection, rinse the customer’s water
line.
•
Customer is to install a stop valve (Y)
with drain sieve.
•
Water pressure (flow pressure) must be
min. 200 kPa (2bar) and max. 600 kPa
(6bar). For combi steamers with
automatic cleaning (CONVOClean
system) flow pressure should be min.
300 kPa (3bar).
•
Water connection using ½" pressure
hose with ¾" threaded joint. Assemble
drain sieve!
•
Adjusted water pressure for OES and
OGS :
see Chapter 10 (Operation
start up)
•
Water conducting capacity must be
between 10 - 200µS/cm.
•
The water must have the following
characteristics:
– pH: 6.5 – 8.5
– Cl
-
< 100 mg/l
– SO
4
< 400 mg/l
– Fe
≤
0.1 mg/l
– Mn
≤
0.05 mg/l
– Cu
≤
0.05 mg/l.
– Cl
2
≤
0.1 mg/l
•
If there are high levels of impurities in
the water, add a (X) 0.08 mm sediment
filter.
•
If the redox potential of the water
exceeds 300 mV at a chlorine
concentration (Cl
2
> 0.1 mg/l) add an
activated carbon filter (W).
Information from water supplier.
Instruct the user that the filter cleaning
intervals must be maintained.
•
If the chlorine value (Cl) is exceeded or
for the combi steamer OEB/OGB the
water hardness is > 18°dH (33° fH; 23°
eH; 320 ppm (USA)), a hydrogen ionic
exchanger (V) is recommended.
•
For combi steamer OES/OGS a
hydrogen ionic exchanger (V) is
absolutely essential (partial
desalinization system i.e. from the
company Brita) if the water hardness is
> 7°dH (13° fH; 8.8° eH; 125 ppm
(USA)).
•
Attention: On all units, note the
residual hardness of the
demineralized water after the
softening:
– Drinking water quality
– Residual:
min. 5°dH - max. 7° dH
min. 9° fH – max. 13° fH
min. 6.3° eH - max. 8.8° eH
min.90 - max.125 ppm (USA).
For more information, see Drinking Water
Installation data sheet
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