2. Connections
Important: before making the connections, disconnect the power supply by turning the main switch
to OFF.
2.1
Pipe connections
gaSteam requires a connection to the gas and water supply and water drain pipes. The feedwater supply
can be connected using a hose with a minimum inside diameter (recommended) of 6 mm. Install a shut-
off valve to allow the appliance to be disconnected during maintenance. We recommend the use of
CAREL hoses (P/N FWH3415003), installing a mechanical filter to trap any solid impurities.
To make the connection:
l drain water: use non-conductive plastic tubing resistant up to 100°C (212°F), with an outside diameter
of 50 mm (ref. 3 in the figure);
l gas supply: use a flexible metal pipe (with vibration isolating joint) connected to a manual shut-off
valve.
Fig.2.a
Ref. Description
1 gas shut-off valve
2 water inlet shut-off valve
3 water drain connection
4 tank drain connection
Tab.2.a
2.2
Water
connection
diagram
Important: the drain pipe must not be obstructed, must not have back pressure and must be fitted
with a drain trap immediately downstream of the connection to the humidifier.
Ref. Description
1 shut-off valve
2 filter
3 feedwater
4
possible reverse osmosis water treatment
system
5 hose (P/N FWH3415003, not supplied)
6
hose (drain tempering option, not
supplied)
2.3
Feed water
The feedwater supply to the humidifier must not be corrosive, must not emit bad odours, and must not
have an excessive lime content to avoid scale build- up. The water supply must be potable or
demineralised water, and must comply with the limits shown in the following table. For proper
operation, it is recommended to use demineralised water; for this purpose, the use of a reverse osmosis
demineralisation system is suggested.
Important: water treatment with polyphosphates or water softeners is allowed, guaranteeing at least
60% of the initial hardness value and no less than 5°f. Softened water reduces maintenance however
favours the concentration of dissolved salts in the water inside the boiler, with the consequence of
foam formation.