Technical data

Connections
15
Boiler Water Connections (Continued)
Multiple DHW tanks only for 92 and 120 USG / 350 and 450 ltr capacity
DHW tank battery with
184 and 240 USG /
700 and 900 ltr capacity
(dual cell)
DHW tank battery with
1350 USG / 360 ltr capacity
(triple cell)
DHW tank battery with
2 x 184 and 2 x 240 USG /
2 x 700 and 2 x 900 ltr capacity
(2×dual cell)
DHW tank battery with
2 x 1350 USG / 2 x 360 ltr capacity
(2 x triple cell)
All piping reverse return or use
balancing valves.
1. Pipe together boiler (not shown) and
tanks as illust rated. Connections
must be accessible for service (use
factory supplied adaptors).
Use hemp and pipe dope on all threaded
stainless steel nipples on tank.
2. For boiler water supply temperatures
over 203°F / 95°C:
Remove plastic supply and return
grommets (grommets are left
threaded).
3. Pipe supply line with an elevation and
install an automatic air vent at the
highest point.
4. Install boiler sensor in s ensor well
(see page 14).
5. Insulate piping.
The circulation pump is activated by the
sensor / operating aquastat and by the
control system installed. The operating
aquastat should be mounted on the tank
which receives the boiler water s upply
last.
Viessmann recommends the installation of
an additional high limit aquastat in the
main discharge pipe of the DHW system.
This aquastat should be wired in series
with the operating aquastat and should be
set approximately 9°F / 5°C higher than
the operating aquastat.
Vitocell 300 1
1
/
4
”
*1
Boiler water supply 2”
*1
Boiler water return 3”
*1
Operating aquastat 4”
*1
5”
*1
*1
Pipe size for boiler supply and return to heat exchanger.
5167 535 v1.3
IMPORTANT
IMPORTANT
Do not stack more than three tanks.
Stack only tanks of identical size.
WARNING
Install tempering v alve(s) to protect
against scalding.
WARNING