REMEHA P 320 Service Manual download pdf (Page 12)

P 320 20/09/2011 - 300016243-001-D

`Operation with modulating burner

- The water temperature in the boiler is maintained at 50°C or more: The burner can modulate down to 30% of the nominal stage

- Operation at modulated low temperature (minimum outlet temperature: 30°C) ; The burner can modulate down to 50% of the nominal stage

5.3 Filling the system

Filling shall be performed with a low flow rate from a low point in the

boiler room in order to ensure that all the air in the boiler is bled from

the high point of the system.

All the pumps must be stopped before filling (included shunt

pump(s)).

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VERY IMPORTANT: Instructions for starting up the boiler

for the first time after the system is fully or partly drained:

If all the air is not bled naturally to an expansion vessel

which opens out onto the air, the system must include

manual bleeder valves, in addition to automatic bleeder

valves with the capability to bleed the system by

themselves when it is operating, the manual bleeder valves

are used to bleed all the high points of the system and to

make sure that the filled system is free of air before the

burner is turned on.



Do not add cold water suddenly into the boiler when it is

hot.

5.4 Sludge removal

A tapped Ø 1’’ 1/2 hole with a plug has been provided on the bottom

of the front of the boiler.. Fit a 1/4 turn valve (not supplied) on the

opening to remove the sludge.

Sludge removal leads to the draining of large quantities of water, so

remember to refill the system after the operation.

Note:

never replace a boiler in an existing system without carefully rinsing

the system first. Install a sludge decanting pot on the return pipe, very

close to the boiler.

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REMEHA P 320 Service Manual Page 12