Welbilt Convotherm 4 - Drain Connection

6.5.3 Drain connection
Regulations for the drain connection
You must comply with local and national regulations on the design of the drain connection and on the composition of the
wastewater
. These include:
■
DIN 1988 part 2 and part 4
■
DIN EN 1717
■
Local wastewater regulations
For appliances with an NSK certificate, the following regulations must also be observed:
■
International Code Council (ICC) or the unified Plumbing Code from the International Association of Plumbing and Me-
chanical Officials (IAPMO)
■
Regulations from the National Sanitation Foundation (NSF)
Drain piping and connections must comply with the International Plumbing Code 2003, International Code Council (ICC) or
the Uniform Plumbing Code 2003, International Association of Plumbing and Mechanical Officials (IAPMO).
Rules for safe installation of the drain connection
Observe the following rules to prevent hazards caused by a faulty drain connection:
■
There must be no restriction or reduction in the cross-section of the drain pipe.
■
The slope of the drain pipe must equal min. 3.5% (2°).
■
If more than one appliance is connected to one drain pipe, this pipe must be large enough to allow the wastewater to flow
out unchecked.
■
The appliance must be connected to the drain using a NON-flexible pipe. Drainage into an open tub or channel is recom-
mended; alternatively
, a fixed connection can be installed.
Connection diagram
The following illustration shows the connection diagram for the wastewater installation on a size 12.20 combi oven as an
example for all appliances:
Item Name Function
1
Appliance drain On the appliance floor, connec-
tion point C, see
'Connection
drawing' on page 101
2
Safety overflow
■
On the appliance floor
, connec-
tion point M, see 'Connection
drawing' on page 101
■
Used to drain away water in the
event of a fault (blockage).
3
Drain pipe DN 50
■
Minimum internal diameter =
46 mm
■
Slope min. 3.5% (2°)
Drain options:
■
Open tank
■
Gully
■
Fixed connection
Connecting the appliance to the drain
Connect the appliance as shown in the connection diagram.
6 Installation
Installation manual 63