Rational LM1 Series User Manual

8 | Water connection
80.06.070_iCombi Pro-iCombi Classic_IM_V01_en-GB 65 / 92
8.3 Notes on water treatment
If the water quality is inappropriate for the unit, then water treatment is re-
quired. Please note the following:
n
Treated water with hardness below 5°dH may be aggressive and corrosive,
and can shorten the lifespan of the device. Do not use treated water with
hardness below 5°dH.
n
Observe all country-specific regulations regarding water and waste water
connections, especially those regarding installation of water tapping points.
n
Contact the local water supply company to inquire about water chloride
levels (Cl
–
), chlorine levels (Cl
2
), conductivity and hardness.
n
Connecting the iCombi Pro to water with hardness below 7°dH: When the
self-test begins, the system will prompt the user to indicate the hardness of
the water the unit is connected to. In this case, select Water hardness below
7°dH.
n
In most cases, water connections do not require additional filters or water
treatment.
n
If critical water conditions prevail, filtration and/or water treatment is re-
quired.
8.4 Selecting the water filter
If critical water conditions prevail, filtration and/or water treatment is required.
Please note the following in relation to the selection:
(A) Fine filters
We recommend particle filters with fineness of 5 - 15 µm [0.0002 – 0.0006
inches] for filtering water contaminated with sand, iron particles or suspended
particles.
(B) Activated charcoal filters
If water contains high levels of chlorine (Cl
2
) over 0.2 mg/l ( corresponds to 0.2
ppm), an upstream activated carbon filter must be installed. Information about
the chlorine level (Cl
2
) can be obtained from the local water supply company.
(C) Reverse osmosis system
If the chloride concentration (C
l-
) is above 80 mg/l [80 ppm], a reverse osmosis
system must be installed, due to the risk of corrosion. Information about the
chloride level (Cl
-
) can be obtained from the local water supply company.
NOTICE
Malfunction due to minimum conductivity not being met
Make sure that the minimum conductivity of the water is 50 μS/cm [32 ppm
TDS].
(D) Water softening
iCombi Pro / iCombi Classic
When used according to instructions, iCombi Pro / iCombi Classic units will
automatically remove limescale. Upstream water softening is not necessary.

Rational LM1 Series Specifications

General

Brand	Rational
Model	LM1 Series
Category	Oven
Language	English