Water Connections - RHOSS UTNC-EV Instructions For Use Manual

II.2.5

WATER CONNECTIONS

IMPORTANT !
It is ver y important for the water conn ections to be
implemented with great care b y sp ecialised
personnel.
II.2.5.1 Connection to the System
Use threaded gas kets and suitable material for the water connections to
the heat exchanger or the val ves i n order to guarantee a perfect s eal.
The unit is equipped with female input and output fittings for the 2-pi pe
and 4-pipe configurations. T he unit is also equipped with an air bleed
val ve that c an be handled with an 8 mm wrench.
IMPORTANT !
The coil can only be partially drain ed. To drain it
completely, blo w air through the coil.
Model
26
41
51
26 (*)
41 (*)
51 (*)
61
86
111
111 (*)
(*) Hot circuits in the 4-pipe version
26 - 41 - 51
1
2
61 - 86 - 111
3
4
5
1 Cold water circuit inlet
2 Cold water circuit outlet
3 Air bleed val ve
4 Hot water circuit inlet
5 Hot water circuit outlet
Ø of fittings
¾"
¾"
¾"
½"
½"
½"
1"
1"
1"
¾"
3
4
5
1
2
SECTION II: INST ALL ATION AND MAINTEN ANCE
II.2.5.2 Setting up the condensate drain
For the condensate to fl ow correctl y, the drain pipe must have a
downward 2% i nclinati on with no bottlenec ks . Furthermore, s et up a
siphon that c an be inspected and is at least 50 mm deep s o as to
prevent odours from returning into the room.
The water can be dr ained to a level that is 200 mm higher than (max)
the unit, as l ong as the tract of the asc ending pipe is vertical and
positioned in line with the drain flange.
To drain the water to a higher level than that allowed, i nstall an auxiliary
condens ate drain pump with a collec tion tray and level regul ator. We
recommend models with a safety fl oat that stops the water flow if the
pump malfuncti ons.
The pi pes mus t be covered with anti-condensate material, e.g.
pol yurethane, polypropyl ene, neoprene or 5-10 mm expanded material.
If several units are installed in a room, the c ondensate drai n pi pes mus t
be ins talled as s hown in the figure.
II.2.5.3 Setting up the w ater siphon
The condens ate drain s ystem mus t be set up with an adequate siphon
so as to prevent the i nfiltration of odours. The diagram below shows
how a water si phon is ins talled.
Always set up or install a plug in the l ower part of the siphon so as to
allow a rapid disassembl y for the cl eani ng operations.
IMPORTANT !
Position the drain pipes so as not to mechanically
stress the drain fitting of the unit.
30
2%