SECTION II: INST ALL ATION AND MAINTEN ANCE
31
II.2.5.4 Inspections
When installation is complete, it is necessar y to:
• Bleed the air c ont ained in th e circuit.
• Ensure that t here are no water l eaks.
• Carefull y co ver the val ve a nd c on necti on pipes wit h 10 mm anti-
condensate material or install the auxiliary tr ays.
• Pour water int o t he c onde nsat e dr ain tra y an d c hec k t ha t the liq uid
drains pr operl y, follo wing it right thr ough t o t he outl et of t he drain-tu be .
If it d oes no t, chec k t he i nclinati on an d lo o k for possibl e bl oc kages.
II.2.5.5 Assembly of the motorised electrothermal
valve
The unit c ontrol circuit onl y allo ws o pe ning of the mot orized valve wh en
the fan motor is working.
When a lower t empera ture is r equired b y th e t her most ats, the outlet V
and H (termin al bl oc ks) is po wered at 23 0V and th e c orrespo nding
chilled wat er or hot water valve is energized.
ATTENTION!
The pump control circuit stops water supply to the
cold v alv e if an irregul ar in cre as e of the cond ensat e
water level is detected into the drain pan.
If a n irregular increas e of th e c ondens ate wat er le vel is det ecte d int o
the drain pan (for e xample: possible de fecti ve drain, pump malf uncti on,
fan motor n ot working) th e c ont act of t he “s afet y level 2” flo at s witch
opens t o clos e th e regulation val ve, sto pping t he c old water fl ow
towards t he coil and a voi ding further condensation.
Regulation
The water flow rate must be chec ked:
• install th e mot orised val ves s upplied as acc essories
or:
• install th e mot orised val ves s up plied by t he i nstaller
List of components
a
b
c
d
e
22C
2-PIPE 4-PIPE
26 61 26 -
41 86 41 -
51 111 51 111
Ref. Description Q.t y Q.t y Q.t y Q.t y
1” Gas Valve - 1 - 1
¾” Gas Valve 1 - 1 1
a
½ Gas Val ve - - 1 -
b Shell 1 1 1 1
c O-ring 2 2 2 2
d Clip 1 1 1 1
e Clamp 3 3 3 3
II.2.5.6 Instructions to install the motorised
electrothermal valve
The el ectrot hermal val ve u nit must be ass embled on to th e unit once
the l atter has been i nstalle d, following the di agrams and acc ording to
the model.
e
ATTENTION!
Lightly grease the O-Rings before placing them into
their se ats.
The val ve u nit f or a c old c oil mus t b e ins talled first in t he 4-pipe models.
Conn ect t he val ve unit to the coil and fast en it by ap plyi ng a t orq ue of:
Type of gasket Nm
Rubber 10/ 12
FabriFibra 25/ 30
Install t he act uat or on to the val ve b ody.
When c onn ecting t he s te el pipes o f th e s yst em, e nsure these are
alig ned a nd support ed s o as n ot t o exert abn ormal force on th e u nit.
When the system is filled with water, verify the tightness of all the
fittings. If the KVA accessory is pr esent, install the auxiliar y tray below
the val ve unit, inserting t he drain pipe int o t he rel ati ve hole; level and
fasten it t o the previously ass embled clip with the three screws
supplie d. I nsul ate th e t hree scre ws an d t he l ower b order of t he tr ay with
insulating material.
NOTE:
The tightness efficien c y of the v alve unit is fa ctor y-
test ed. An y lea ks in t he s yst em a re t her efore due to
an incorr ect in stall ation.
Cover th e val ve with t he shell (b), bloc king it wit h the cla mps (e) a nd
ensure th at all th e cold p arts are insula ted.
Fit the act uat or on the val ve b ody, route t he val ve c abl e thr ough t he box
and connec t it t o t he t ermi nal bl oc k as shown in fig . To co nnect t he
steel pipes to the s ystem, ens ure t he y are alig ned and su pported to
avoid e xcess s train on the u nit. I f the s yst em is filled wit h wat er, chec k
all fitting seals. Aft er ending t he hydraulic co nnec tions , ma ke sure ther e
are n o le a ks Ins ulat e t he val ve using the sh ell, fi x it b y means of t he
clips and ma ke sure tha t all c old parts are ins ulate d. F or 4-pip e hot
wat er, repeat all t he operations with gas a daptors, as p er the t able .
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