15
5696 675 - 04
Vitocell 300-H, EHA Series Installation
Connections
Domestic Water Connections
Legend
A
Domestic hot water
B
1
a
"
*1
C
1
b
”
*1
D
Domestic cold water
E
2"
*1
F
2
b
”
*1
G
Secondary high limit aquastat
*1
Pipe size for domestic cold and hot water piping.
DHW tank battery
with 184 and 238 USG
(700 and 900 L)
(dual cell)
DHW tank battery with
2 x 184 and 2 x 238 USG
2 x (700 and 2 x 900 L)
(2 x dual cell)
DHW tank battery with
2 x 357 USG
2 x (1350 L)
(2 x triple cell)
Ensure that local rules and regulations regarding this
type of product have been observed.
1. Pipe boiler and tank as illustrated. Connections must
be accessible for service (use factory supplied
adaptors).
2. Insulate domestic hot water piping and valves.
IMPORTANT
In order to avoid temperature stratification Viessmann
recommends the use of a small recirculation pump
between the DHW supply point
A
and the DCW
supply point
D
in multiple tank arrangements.
The recirculation pump will only operate when there
is no DHW draw from the tank batteries.
DHW tank battery with
357 USG (1350 L)
(triple cell)
