Viessmann EHA Series - Page 9

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5696 674 - 03
Vitocell 300-H, EHA Series Technical Data
Product Installation
Connections
IMPORTANT
When connecting an externally powered anode to the top
flange lid, separate the magnesium anode in the bottom
flange lid from the grounding cable. The magnesium anode
may remain installed.
IMPORTANT
When connecting an externally powered anode to the top
flange lid, separate the magnesium anode in the bottom
flange lid from the grounding cable. The magnesium anode
may remain installed.
Legend
A Domestic hot water supply
B DHW recirculation line
C DHW recirculation pump
D Spring loaded flow check valve
E Discharge pipe of temperature and pressure relief valve
F Temperature and pressure relief valve
G Shut-off valve
H Drain
K Domestic cold water supply lines
L Backflow preventer
M Domestic cold water inlet
N Precharged expansion tank
(required where backflow preventer is installed;
check local plumbing codes and requirements)
O Thermostatic mixing valve/anti-scald
Domestic hot water connections
42 and 53 USG (160 and 200 L) capacity
Domestic hot water connections
92 and 119 USG (350 and 450 L) capacity