Filling And Draining The System - Riello ALUDOMUS SOLAR KV/200 20 ISC SOLAR Installation And Maintenance Manual

INSTALLER

2 . 1 4 Filling and draining the system

ALUDOMUS SOLAR boilers incorporate a CH system fill
cock (1).
FILLING THE STORAGE CyLINDER
− Make sure that the storage cylinder drain cock (2)
is closed.
− Open the DHW user taps.
− Open the DHW circuit shut-off cocks and slowly
fill the storage cylinder until clean, air-free water
flows out from the taps in a uniform manner.
FILLING THE CENTRAL HEATING SySTEM
− Make sure that CH system fill cock (3) is closed.
− Open the non-return valve (4) to facilitate filling.
See the figure to ascertain the correct position for
the dot on the screw.
− Slacken off the cap of the automatic vent valve (5)
to let air out of the system.
− Slacken off the caps of the manual bleed valve
(6). Close the valve again as soon as water starts
to come out.
− Open the CH system fill cock (1) and slowly fill the
system until the pressure gauge reads out a value
of 1.5 bar.
− Close the CH system fill cock (1) and tighten down
the cap on the automatic vent valve (5).
− Close the non-return valves (4). See the figure to
ascertain the correct position for the dot on the
screw.
FILLING THE SOLAR HEATING CIRCUIT
Heat transfer liquid
Use only non-toxic propylene glycol as heat transfer
fluid. Mix the propylene glycol with water (preferably
demineralised), by pouring the glycol into a container
of water and not vice-versa. Establish the necessary
concentration of glycol using the table alongside. The
temperatures given in the table define the level of anti-
freeze protection provided.
1
2
Glycol / water proportions for different
minimum temperatures
% glycol by weight
10
20
26
30
36
40
44
6
5
4
4
3
CLOSED
OPEN
Minimum outdoor
temperature °C
-3,5
-8,0
-12,5
-15,0
-20,0
-24,0