Technical data

14
USA
5938 035 01
have its own branch circuit protection. An air-o-steam® unit stacked
with an air-o-chill® unit should have a separate protection for the
upper and lower units.
4. WATER MAINS CONNECTION
(Refer to the installation diagrams at the beginning of this booklet).
This equipment is to be installed to comply with the applicable
Federal, State, Local plumbing codes, or the Basic Plumbing
Code of the Building Officials and Code Administrators
International Inc. (BOCA) and Food Service Sanitation Manual
of the Food and Drug Administration (FDA).
When connecting the appliance to the water system with
flexible tubes they must be new and not used.
The appliance is fitted with two separate water inlets ("B" and "N").
The water lines supplying both inlets must be fitted with a
mechanical filter and shut-off valve (keeping with local plumbing
codes).
Before fitting the filters allow the water to flow out for sufficient time
to flush any solid particles from the piping.
Pressure between 22 and 65 psi (150-450 kPa).
WATER INLET “N”
Attention (water inlet N)
If the supply pipes provided with the appliance are not long
enough for installation, use longer ones with int. diameter at
least ø 20 mm and free of elbow unions.
Note:
To check correct water installation, make sure the rotating wash
arm (CLEANING SYSTEM) does not turn below 100 rpm (120
max).
4.1 WATER SUPPLY CHARACTERISTICS
The appliance must be supplied with drinking water having
specific characteristics given in this section.
HARDNESS FILTER
°f ppm °dH
Water
in le t
Appl. Hardness
A ^ 0,5 - 5 5 - 50 0,28 - 2,8
B ^ 0,5 - 5 5 - 50 0,28 - 2,8
C ^ m ax 5 m ax 50 m ax 2,8
A ^ m ax 5 m ax 50 m ax 2,8
B ^ m ax 40 m ax 400 m ax 22
C ^ m ax 5 m ax 50 m ax 2,8
N
B
^ OPERATING LEVEL (C = Convect, Convection).
The hardness values given in the table are for reducing scaling
inside the steam generator and possible cooking compartment
washing system.
If the available water does not have these hardness characteristics
a water softener must be installed.
Therefore the Automatic Water Softener with automatic
regeneration for installing on the inlet line, can be requested as
an accessory; it has a Resin Sterilizer kit (also by request).
HARDNESS AND CHLORIDE FILTERS
The chloride concentration (Cl-) (ppm - mg/l) values with pH
(>7) and Conductivity (µS/cm) (measured at 68°F)(20°C) must
be such as to not damage the steel structures inside the oven
(only water inlet B).
Therefore the characteristics of the available water must be
identified in the graph given at the end of this handbook (page
99), if necessary installing at the inlet the type of filter indicated
in the relevant area of the values.
The filters indicated are:
- No filter for chloride (Cl-) in the conforming area (Normal)
- Nanofilter
as an accessory on request, called Water Filter.
- Osmotizer.
Make sure the water coming out the filter is inside the optimum
area (Normal).
These filters also have the function of reducing the water
hardness to optimum values (below 50ppm)(5°fH), and therefore
also act as a water softener.
ATTENTION: Periodical checking according to the filter
manufacturer’s instructions is important to maintain its efficiency
and avoid the risk of corrosion in the appliance.
Level C ovens are convection ovens. If water having
characteristics outside those specified is used to create humidity
inside the oven, there will be the risk corrosion of the compartment
and that present inside it.
Carry out regular maintenance of the water softeners and filters
to ensure their optimum efficiency.
To avoid damage to the appliance, after every periodical
regeneration do a filter cleaning cycle without introducing water
in the oven.
The manufacturer declines any liability in case of incorrect
maintenance.
Important:
The use of dosing systems designed to prevent the build-
up of lime-scale in pipes (i.e. polyphosphate dosing
systems) is prohibited since such systems may impair the
performance of the appliance.
4.2 WATER DRAIN SYSTEM
- OVEN level A -
The oven is supplied with an air-break system to prevent any
backflow from the drainage system from reaching the oven’s inter-
nal circuits and the cooking chamber. The presence of this system
means that the drain pipe can be connected directly to the mains
drainage system or routed to a floor gulley with grating.
The flexible drainage hose or rigid pipe can be directed to the
side or rear of the appliance if the oven is not positioned against
a wall; this line must not be directed towards the front of the
appliance to prevent interference with roll-in grid racks. The drain-
age pipe internal diameter must be no smaller than the oven
drain outlet (1 1/4"), no longer than 3 feet (1 metre) and must
resist temperatures of up to at least 212°F (100°C). Avoid re-
strictions in the case of flexible hose pipes, do not fit elbows on
metal pipes anywhere along the drainage line. Also avoid
horizontal sections in which water might collect (minimum gra-
dient 5%).
WARING: BLOCKING THE DRAIN IS HAZARDOUS.
C - Oven drain
C1 - Safety outlet
Important:
- Do not obstruct the safety outlet C1.
- Do not connect the safety outlet C1 to the drainage system.
Note:
If water comes out of the AIR-BREAK (safety outlet C1) this means
the drain C is blocked. Any elimination of the obstruction must
be carried out by specialised technical personnel.