E93.1001EN.C Manual CD
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Tank connection sizes:
Code
Connection
M / F Remarks
EWD300
EWD450
EWD750
A
return to water heater
M
incl. reducing ring
R 2"
R 2"
R 2"
excl. reducing ring
R 1½"
R 1½"
R 1½"
B
flow from water heater
M
incl. reducing ring
R 2"
R 2"
R 2"
excl. reducing ring
R 1½"
R 1½"
R 1½"
C
cold water inlet
M
incl. reducing ring
R 2"
R 2"
R 2"
excl. reducing ring
R 1½"
R 1½"
R 1½"
D
DHW outlet
M
incl. reducing ring
R 2"
R 2"
R 2"
excl. reducing ring
R 1½"
R 1½"
R 1½"
E
free connection (T&P valve)
F
incl. plug
Rp 1½" Rp 1½"
Rp 1½"
F
circulation return
M
incl. cap
R ¾"
R ¾"
R ¾"
G
bleed valve
-
-
-
-
-
H
thermometer connection
F
incl. plug
Rp ½"
Rp ½"
Rp ½"
C
ONDENSATE DRAIN CONNECTION
The condensate drain is placed at the centre at the bottom of the water heater and has a ¾ inch hose discharge.
Connect this flexible hose to the sewer system.
Use only plastic parts with the condensate drain. Metal lines are not allowed.
Blockage of this drain might damage the water heater. The drain connection is correct when the condensate can
be seen flowing away, e.g. using a funnel. Any damage that might occur, when the drain is not installed correctly,
is not covered by the warranty of the water heater.
There should be an open connection between the condensate hose and the sewage system, to make sure that
any pressure difference between the two can never affect the condense water level and hence the functioning of
the water heater:
When mounting the bottom part of the siphon, before commissioning the water heater and/or after
maintenance, it must
ALWAYS
be completely filled with water.
This is a safety measure: the water in the siphon keeps the flue gases from entering the water
heater room via the condensate drain.
The siphon must always be filled to the edge
with water, before replacing to the unit
open
connection
