Maximum Length; Minimum Length - Riello RESIDENCE HM Series Instructions For The User

The clapet accessory kits with integrated siphon available in the catalog are
suitable for the collection and flow of condensate inside the boiler.
WARNINGS:
b
The appliances connected to a joint flue must all be of the same type and
b
have equivalent combustion characteristics.
The number of appliances that can be connected to a collective smoke
pipe under positive pressure is defined by the smoke pipe designer.
The boiler is designed to be connected to a collective smoke pipe sized to
work in conditions where the static pressure of the collective flue gas pipe
may exceed the static pressure of the collective air pipe by 25 Pa when n-1
boilers are working at the maximum nominal heat output while 1 boiler is
working at the minimum heat output permitted by the controls.
b
The minimum permitted pressure difference between the flue gas out-
let and the combustion air inlet is -200 Pa (including -100 Pa of wind
pressure).
Additional accessories (bends, extensions, terminals, etc.) are available for
this type of discharge, which make possible the flue gas exhaust configura-
tions specified in the boiler manual.
b
The pipes must be assembled so as to avoid pockets of condensate
that would prevent the correct evacuation of the flue gases.
b
A data plate must be positioned in the point of connection with the
collective flue gas pipe. The plate must show at least the following
information:
- the collective flue is sized for boilers type C(10)3
- the maximum mass flow rate permitted for the flue gases, kg/h
- the dimensions of the connection to the shared pipes
- a warning concerning the air outlet and combustion product input
openings of the pressurised collective flue; these openings must
be closed and a check must be made when the boiler is discon-
nected, to make sure they are airtight
- the name of the manufacturer of the collective flue gas pipe, or the
b
company's logo
See applicable legislation for the discharge of the combustion prod-
b ucts as well as local regulations.
The flue gas pipe must be carefully chosen on the basis of the follow-
ing parameters.

maximum length

4,5 + 4,5
ø 80-80
4,5
ø 80/125
b
Before attempting any operation, disconnect the appliance from the
electrical supply.
b
Before assembling, lubricate the gaskets with a non-corrosive glide
lubricant.
b
If the flue gas discharge pipe is horizontal, it must be tilted 3° towards
the boiler.
b
The number and characteristics of the appliances connected to the
smoke pipe must be suitable for the real characteristics of the pipe
itself.
b
The terminal of the collective pipe must create a draught.
b
The condensate can flow inside the boiler.
b
The maximum permitted recirculation rate in windy conditions is 10%.
b
The maximum permitted pressure difference (25 Pa) between the flue
gas inlet and the air outlet of a collective smoke pipe cannot be ex-
ceeded when n-1 boilers are working at the maximum nominal heat
output while 1 boiler is working at the minimum heat output permitted
by the controls.
b
The collective flue gas pipe must be suitable for an overpressure val-
ue of at least 200 Pa.
b
The collective flue must not be equipped with a draught-breaking device.

minimum length

UM
0,5 m
0,5 m
Bends and extensions, available as accessories, can be installed according
to the desired type of installation.
The maximum permissible flue gas pipe and air intake pipe lengths are
shown in chapter "4.8 Flue gas exhaust and combustion air suction".
With C(10)3 installation, show the number of fan rotations (rpm) on the
label applied alongside the appliance serial number.
4.10 Filling the heating system and removing air
NOTE: operations for filling the system must be carried out using the
filling tap (outside the boiler) ensuring that the boiler is electri-
cally powered.
NOTE: whenever the boiler is powered electrically, the automatic vent
cycle is carried out.
NOTE: the presence of a water alarm (E040, E041 o E042) does not
allow the vent cycle to be performed.
Proceed to filling the heating system by carrying out the following steps:
- open the filling tap (outside the boiler) by turning it anticlockwise
- check that the pressure value reaches 1-1.5 bar by means of a hy-
drometer placed under the bracket
- close the filling tap (outside the boiler).
NOTE: if the mains pressure is less than 1 bar, keep the filling tap open
(outside the boiler) during the vent cycle and close it once
finished.
To start the vent cycle:
- switch off the power supply for a few seconds
- connect the power again leaving the boiler OFF
- check that the gas tap is closed.
At the end of the cycle, if the circuit pressure has decreased, act on the
filling tap again (outside the boiler) to bring the pressure to the recom-
mended value (1-1.5 bar).
After the vent cycle, the boiler is ready.
- Remove any air in the domestic system (radiators, zone manifolds,
etc.) using the bleed valves.
- Once again check that the system pressure is correct (ideally 1-1.5
bar), restoring the right level if necessary.
- If air is noticed when operating, repeat the vent cycle.
- Once the operations are finished, open the gas tap and ignite the
boiler.
At this point it is possible to carry out any heat request.
4.11 Emptying the boiler heating circuit
Before draining, set the boiler to OFF and shut off the electrical supply
setting the main system switch to OFF.
- Close the heating system taps (if present).
- Connect a pipe to the system drain tap (C), then manually turn it
anticlockwise to drain off the water.
NOTE: act on the system drain tap (C) with a size 13 wrench
- When finished, remove the pipe from the system drain tap (C) and
close it.
11
C