Multiple Dhw Tank - Viessmann VITOCELL 300-H Installation Instructions Manual

Connections
Steam Heating Side Connections
Recommended piping of a tank battery in a steam system
Legend
A Vitocell 300-H
B Condensate trap
C Sensor/Aquastat well
D Steam supply
E Steam valve
F Vacuum breaker
G Condensate line
14
[only for 92 and 119 USG (350 and 450 L)]

Multiple DHW tank

The following installation is also subject to local codes
and requirements:
The following installation is also subject to local codes
and requirements:
- Install a steam valve and vacuum breaker between
steam supply line and each tank.
Install a drain with a condensate trap at the end of
the steam supply line to each steam valve.
Install a condensate trap on each heat exchanger
outlet before connecting all condensate lines to a
common condensate return line.
or
- Install a steam valve in the common steam supply
line.
Install a vacuum breaker after the steam valve.
Install a drain with a condensate trap at the end of
the steam supply line to each steam valve.
Install a condensate trap on each heat exchanger
outlet before connecting all condensate lines to a
common condensate return line.
All piping reverse return.
1. Pipe together steam and condensate lines as
illustrated. Connections must be accessible for
service (use factory supplied adaptors).
2. Remove plastic grommets on each tank where steam
and condensate lines connect (grommets are left
threaded).
3. Install an approved type high limit aquastat for
temperature control of domestic hot water on each
tank.
4. Install aquastat temperature sensor in sensor well;
install steam valve.
5. Insulate piping.
WARNING
Do not stack more than three tanks. Stack only tanks of
identical size.
IMPORTANT
To ensure uniform heating of domestic hot water
within each tank battery, install domestic hot water
recirculation as illustrated on page 18.
Cap any unused recirculation connection on each tank.
Follow the control and safety recommendations of the
respective steam boiler manufacturer.
Vitocell 300-H, EHA Series Installation
(continued)