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5696 675 - 06
Vitocell 300-H, EHA Series Installation
Steam Heating Side Connections [only for 92 and 119 USG (350 and 450 L)] (continued)
IMPORTANT
WARNING
Do not stack more than three tanks. Stack only tanks of
identical size.
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.
Legend
A Vitocell 300-H
B Condensate trap
C Sensor/Aquastat well
D Steam supply
E Steam valve
F Vacuum breaker
G Condensate line
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.
Recommended piping of a tank battery in a steam system
Multiple DHW tank
Connections
14


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