Viessmann VITOCELL 300-H Service Manual download pdf (Page 21)

Connections

Recirculation Connections

H Pipe domestic hot water supply piping

with tank as illustrated. Connections

must be accessible for service (use

factory supplied adaptors).

Connection sizes are provided in

section entitled Orientation and

Dimensions on

page 12.

H Install recirculation pump, flow-check

valve and recirculation t imer (for

shut-down during off-hours where

feasible) on the recirculation piping

side.

H Gravity circulation of the recirculation

system is restricted due to the

upward-curved domestic hot water

discharge piping inside the tank.

H Connect tank battery to existing

recirculation piping. Cap off unused

recirculation connections of individual

tanks.

Connection of a recirculation sys tem in a multiple tank installation

for sy stems utilizing boilers or remote heating plants without low temperature boiler return water

and for steam heating operation with 15 psi and one recirculation line (Fig 18.)

Fig. 18.

Domestic hot water

Recirculation piping

Domestic cold water

Saving Energy

A timer on the recirculation pump

reduces the heat loss significantly in

commercial applications during times

when no or reduced demand for

domestic hot water occurs.

Connection of a recirculation sys tem in a multiple tank installation

for remote heating plants with low temperature boiler return water limit

and/or for multiple recirculation lines (Fig 19.)

Domestic hot water

Recirculation circuit

Domestic cold water

Fig 19.

5167 535 v1.3

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Viessmann VITOCELL 300-H Service Manual Page 21

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