Carel compactSteam - 1 Compactsteam Operation; Operating Stages; Cylinder Service Life

9
ENG
“compactsteam” +0300092IE - rel. 1.2 - 14.01.2021
1. COMPACTSTEAM OPERATION
Range of isothermal humidiers for steam production in rooms. The
steam is produced from the water contained in the cylinder (connected
to the mains). The water boils and evaporates due to the electric current
generated by two immersed electrodes in the cylinder.
1.1 Operating stages
• the humidier opens the ll valve (1) connected to the main water
supply;
• the water ows through the hose (2) to the tank (3), the ow restrictor
(4) controls the lling speed;
• when the tank is full, the water overows into the hose (6) and starts
lling the cylinder (5);
• once the level of water in the cylinder has been reached, the humidier
closes the ll valve (1);
• the current generated by the immersed electrodes in the cylinder (7)
heats the water until it boils;
• the steam exits the cylinder through the outlet (8) and - depending on
the model of humidier - is distributed directly into the room (using a
fan), or into the duct (via a steam line).
Note:
• if the water in the cylinder exceeds the level sensor (9), the humidier
will activate the drain pump (11) and empty the excess quantity;
• if the current generated in the cylinder exceeds the required level, the
humidier will activate the drain pump (11) and discharge the amount
of water needed to restore the correct current;
• before emptying the humidier activates the tempering valve (10) to
cool the water to 60°C/140°F;
• the humidier automatically controls the quantity of mineral salts
dissolved in the water by activating the ll (1) and drain (11) pumps;
• the cylinder is tted with a lter (12) to prevent the mineral debris from
blocking the drain pump (11);
• if the humidier is in standby and does not produce steam for more
than 3 days (72 hours), the water in the cylinder is automatically
emptied;
• the ll tank (3) is connected to an overow hose (13) to prevent contact
between the mains water and the water in the cylinder;
• the current running through the cylinder is controlled by the current
transformer connected to the electrodes (7).
HL
DP
DT
EVF
7
12
5
10
1
4
6
2
13
13
9
8
11
Fig. 1.a
Key:
No. Description No. Description
1 ll valve 8 steam outlet
2 ll hose 9 level sensor
3 ll tank 10 tempering valve
4 ow restrictor 11 drain pump
5 cylinder 12 water drain lter
6 cylinder ll hose 13 overow hose
7 immersed electrodes
A
F
B
C
D
E
Fig. 1.b
Key:
No. Description
A Steam generator cylinder
B Steam blower (optional)
C User interface/display
D On/o button
E Fill and mixing valves
F Drain pump
1.2 Cylinder service life
Basic information
The plastic cylinder containing the electrodes is the most important
component of the humidier. During operation, the water in the cylinder
boils to produce steam. As the steam does not entrain any of the minerals
dissolved in the water, the concentration of such minerals will increase
the more steam is produced; moreover, some salts (especially calcium
and magnesium bicarbonates) tend to foul the electrodes, until these
become electrically insulated. As the electrodes become progressively
coated with scale, the water level in the cylinder is increased so that a
new portion of clean electrodes can conduct the current. Eventually, the
electrodes will be completely coated with scale and will no longer be
able to conduct the current needed to produce steam. The humidier
controller can detect when there is low current between the electrodes,
indicating the end of the cylinder’s service life; this is displayed by
alarm code E3. Several factors inuence cylinder service life (water
characteristics, such as hardness and quality, % of steam production); for
the part numbers specied in Table 8.a, the cylinder has a service life of
600 or more hours.
Water drain
Water ll