Pipe Installation - Nibe PUB2 Series Installation And Maintenance Instructions Manual

GB
Assembly
The copper-lined hot water heater must be installed up-
right and can be aligned using the adjustable feet (11).
Dismounting of insulation (only
applies to PUB2 500 & PUB2 DS 500)
The hot water heater can be made less bulky upon
installation by removing the insulation (water heater
diameter without insulation is Ø 670).
Loosen all the screws along the joining plate on
■
both jacket halves.
Remove the drain valve.
■
Lift off the top cover.
■
Pull the insulated jacket halves straight out.
■
Carry out assembly in reverse order.
If the screws are difficult to fit in the old holes, the plate
can be turned upside down, which gives new, unused
holes in the insulated jacket halves.
Finally fit all the enclosed cover discs on each connec-
tion by pressing them over the connections.
Once the hot water heater is in the required position
remove the lifting device from the top and fit the ac-
companying insulation plug in the hole left by the lifting
eye (10).
2
Fit the cover discs before the
pipe installation is made.

Pipe installation

The pipe installation must be carried out in accordance
with applicable standards.
NOTE!
The hot water heater must be filled with water before
the charging via the coil is started.
Internal support bushes should be fitted when a plastic
pipe or annealed copper pipe is used.
An overflow pipe should be routed from the safety valve
to an appropriate drain. The size of the overflow pipe
must be the same as on the safety valve (according to
applicable standards). The overflow pipe must be routed
downwards to prevent water pockets and to be frost
proof. The outlet of the overflow pipe should be visible.
When the hot water heater is installed without a mixing
valve, the charging control must ensure that the tap wa-
ter temperature does not exceed 60°C. Should a higher
temperature be required, follow applicable directions for
the application.
Coil
When determining the water speed one should not
exceed 1.5 m/s in event of continuous charge flow. This
corresponds to a water flow of approx 1650 l/h for Ø22
mm coil (PUB2 160/210/300/500) and approx 1050 l/h
for double separation coil (PUB2 DS 160/300/500).
The flow temperature to the coil must not exceed
120 °C. The operating temperature of the hot water
heater must not exceed 95 °C.
Risk of air bubbles in the coil is eliminated because the
intake connection is the highest point.
PUB2
NOTE!