Ariston SGA X 500 Installation And Maintenance Instructions Manual page 51

DISCHARGE
Empty the appliance should this remain
inactive in unheated premises, with envi-
ronmental temperatures below zero.
Upon installation, envision such eventua-
lity and connect a drain cock to fi tting O.
TO EMPTY THE WATER HEATER:
• Switch-off the burner and close the
gas supply
• Close the shut-off cock upstream of
the appliance;
A. Gas supply
B. Gas inlet valve
C. Gas fi lter
D. Hot water delivery
E. Dielectric insulating fi tting
F. Air relief valve
G. Safety valve
H. Recirculation circuit
I. Recirculation pump
J. Non-return valve
K. Cold water valve
L. Cold water fi lter
M. Cold water supply
N. Safety valve drain
O. Drainage valve
P. Discharge water expulsion device
R. Flue condensate water expulsion
• Open the use cocks downstream from
the water heater;
• Open the drain cock connected to fi t-
ting R.
RECIRCULATION
Should the utility plant also include the
circuit for the DHW recirculation, fi tting H.
used for draining.
The circuit at the side schematises the
connection to be carried out in this case.
B
C
A
F
E
E J I
G
L
E
J
N
O
P
GB
D
H
K
M
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