Feedwater; Drain Water - Carel humiSonic User Manual

4.5 Feedwater

To ensure correct operation, humiSonic requires the use of demineralised
water, with the chemical and physical characteristics specified in the table.
To ensure these water quality values, a reverse-osmosis demineralisation
system is typically used.
FEEDWATER
Water connection pipe
Temperature limits °C (°F)
Pressure limits bars (psi)
Specific conductivity at 20°C
Total hardness
Temporary hardness
Total quantity of dissolved solids (cR) Depending on specific conductivity (1)
Dry residue at 180°C
Iron + manganese
Chlorides
Silicon dioxide
Chlorine ions
Calcium sulphate
Instant flow- fill SV
l/min (gpm)
C =0.65 * σ
(1) = typically
R R,20
The reverse osmosis system must be sized based on hourly production
and not instant production, to avoid oversizing. For this purpose, an
expansion vessel should be installed between the water treatment
system and humiSonic. Discontinuous water consumption must be
taken into account, involving the following phases:
• filling (fill valve open);
• production (fill valve closed);
• washing (fill valve open).
The table below suggests the minimum sizes for connection to a generic
reverse osmosis system.
Mod. Storage Total exp. vessel volume l (gal) (pre-
l (gal) charge 1.5 bars/22 psi)
UU02 2.8 (0.62) 11.2 (2.46)
UU05 3.6 (0.79) 14.4 (3.17)
UU06 4.4 (0.97) 17.6 (3.87)
UU08 5.2 (1.14) 20.8 (4.56)
If no storage vessel is available, the reverse osmosis system must
guarantee the instant flow-rate of the fill SV, equal to 0.6 l/min (0.16 gpm).
Connecting humiSonic to the Carel WTS Compact
The Carel product range includes a series of reverse osmosis systems
("WTS Compact") designed to produce water according to the feedwater
specifications and optimise connection to and operation with humiSonic
(see manuals +0300017EN and +0300019EN). All WTS Compact systems
(P/N ROC%) always come with an expansion vessel, that maintains the
required pressure in the circuit downstream. Operation of the system
is managed by pressure switches in the outlet circuit. The basic rule for
connection to the humidifier is that the water contained in the expansion
vessel must be sufficient to satisfy initial filling and, if necessary, the
washing cycle, while the WTS production time must cover humiSonic
production demand and fill the vessel as quickly as possible.
OD 8 mm (OD 5/16")
1 to 40 (33.8 to 104)
1 to 6 (14.5 to 87)
3 to 80 μS/cm
0 to 25 mg/l CaCO3
0 to 15 mg/l CaCO3
Depending on specific conductivity (1)
0 mg/l Fe+Mn
0 to 10 ppm Cl
0 to 1 mg/l SiO2
0 mg/l Cl
mg/l CaSO4
0.6 (0.16)
Tab. 4.a
°C; R = 0.93 * σ
180 R,20 °C
Reverse osmosis
system l/h (gph)
4.8 (1.27)
7.6 (2.01)
10.4 (2.75)
13.2 (3.49)
Tab. 4.b
The table below suggests the water consumption values and connections
for all sizes of humidifiers.
Mod. Prod. Tank capacity
l/h (gph) l (gal)
UU02 2 (0.53) 0.8 (0.18)
UU04 4 (1.06) 1.6 (0.35)
UU06 6 (1.59) 2.4 (0.53)
UU08 8 (2.11) 3.2 (0.70)
(*) Water consumption during the washing cycle is calculated based on the default
settings (1 wash every 12 h, lasting 1 minutes, which ends by totalling filling and
emptying the volume of the tank). Consumption depends on the fill solenoid valve
flow-rate, which is 0.6 litres/minute (0.16 gpm). The duration and frequency of
the washing cycles are parameters that can be set by the user, and these have a
significant impact on the sizing of the WTS system.
Periodic washing is also recommended so as to maintain the WTS that
supplies the humidifier in good working condition. The water inside the
reverse osmosis system needs to be stirred periodically to avoid excessive
build-up of minerals on the membranes.
DANGER:
• do not add disinfectants or anticorrosive compounds to the water, as
these are potential irritants;
• the use of well water, industrial water or water from cooling circuits
and, in general, any potentially chemically or bacteriologically
contaminated water is prohibited. Bacteria and viruses can enter the
air we breather via contaminated water and cause serious illness.

4.6 Drain water

This is not toxic and can be drained into the sewerage system, as
defined by Council Directive 91/271/EEC concerning urban waste water
treatment.
DRAIN WATER
Quick coupling
Typical temperature °C (°F)
11 Direct version for room applic. +0300062EE - rel. 1.4 - 24.09.2020
ENG
Wash (*) WTS P/N
l/h (gph) (non-US markets)
2.8 (0.74) ROC025500N
3.6 (0.95) ROC025500N
4.4 (1.16) ROC025500N
5.2 (1.37) ROC025500N
Tab. 4.c
OD 8 mm (OD 5/16")
1 to 40 (33.8 to 104)