RHOSS UTNC-EV Instructions For Use Manual page 15

II.2.5.4 Inspections
When ins tallation is c omplete, it is nec essar y to:
• Bleed the air c ontained in the circuit.
• Ensure that there are no water l eaks.
• Carefull y cover the val ve and c onnecti on pipes with 10 mm anti-
condens ate material or install the auxiliary tr ays.
• Pour water into the c ondensate dr ain tray and c hec k that the liquid
drains pr operl y, following it right thr ough to the outl et of the drain-tube.
If it does not, chec k the i nclinati on and look for possibl e bl oc kages.
II.2.5.5 Assembly of the motorised electrothermal
valve
The unit c ontrol circuit onl y allows opening of the motorized valve when
the fan motor is working.
When a lower temperature is r equired by the ther mostats, the outlet V
and H (terminal bl oc ks) is powered at 230V and the c orresponding
chilled water or hot water valve is energized.
ATTENTION !
The pump control circuit stops water supply to the
cold valve if an irregular in crease of the cond ensate
water level is detected into the dr ain pan.
If an irregular increas e of the c ondens ate water level is detected into
the drain pan (for example: possible defecti ve drain, pump malfuncti on,
fan motor not working) the c ontact of the "s afety level 2" float s witch
opens to clos e the regulation val ve, stopping the c old water fl ow
towards the coil and avoi ding further condensation.
Regulation
The water flow rate mus t be chec ked:
• install the motorised val ves s upplied as acc essories
or:
• install the motorised val ves s upplied by the i nstaller
List of components
b
c
d
e
Ref. Description
1" Gas Valve
a
¾" Gas Valve
½ Gas Valve
b
Shell
c
O-ring
d
Clip
e
Clamp
22C
a
2-PIPE 4-PIPE
26 61 26 -
41 86 41 -
51 111 51 111
Q.ty Q.ty Q.ty Q.ty
- 1 - 1
1 - 1 1
- - 1 -
1 1 1 1
2 2 2 2
1 1 1 1
3 3 3 3
SECTION II: INST ALL ATION AND MAINTEN ANCE
II.2.5.6 Instructions to install the motorised
electrothermal valve
The el ectrothermal val ve unit must be ass embled on to the unit once
the l atter has been i nstalled, following the di agrams and acc ording to
the model.
e
ATTENTION !
Lightly gr ease the O-Rings before placing them into
their seats.
The val ve unit for a c old c oil mus t be ins talled first in the 4-pipe models.
Connect the val ve unit to the coil and fasten it by applyi ng a torque of:
Typ e of gasket
Rubber
FabriFibra
Install the actuator on to the val ve body.
When c onnecting the s teel pipes of the s ystem, ensure these are
aligned and supported s o as not to exert abnormal force on the unit.
When the s ys tem is filled with water, verify the tightness of all the
fittings. If the KVA acc essor y is pr esent, ins tall the auxiliar y tray below
the val ve unit, inserting the drain pipe into the rel ati ve hole; level and
fasten it to the previously ass embled clip with the three screws
supplied. Insul ate the three screws and the l ower border of the tr ay with
insulating material.
NOTE:
The tightness efficien cy of the valve unit is factor y-
tested. An y leaks in the syst em are ther efore due to
an incorr ect in stallation.
Cover the val ve with the shell (b), bloc king it with the clamps (e) and
ensure that all the cold parts are insulated.
Fit the actuator on the val ve body, route the val ve c abl e thr ough the box
and connec t it to the termi nal bl oc k as shown in fig. To connect the
steel pipes to the s ystem, ens ure they are aligned and supported to
avoid excess s train on the unit. If the s ystem is filled with water, chec k
all fitting seals. After ending the hydraulic connec tions , make sure ther e
are no leaks Ins ulate the val ve using the shell, fi x it by means of the
clips and make sure that all c old parts are ins ulated. F or 4-pipe hot
water, repeat all the operations with gas adaptors, as per the table.
31
Nm
10/12
25/30