Nova Florida VELA COMPACT - 3.2.10 Power Mains Connection; 3.2.11 Room Thermostat Connection; 3.3 Loading the System

2
5
3
.2.1
0
.
Po
w
e
r m
a
in
s
co
nn
ec
ti
o
n
s
Th
e
b
o
il
er
i
s supp
li
e
d
w
i
t
h
a t
h
ree-po
l
e
d
power ca
bl
e, a
l
rea
d
y connecte
d
to t
h
e e
l
ectron
i
c
b
oar
d
an
d
i
t
i
s prov
id
e
d
w
i
t
h
an ant
i
-ruptu
-
r
e

rming clamp.
T
h
e
bo
il
e
r i
s
t
o
be
co
nn
ec
t
ed
t
o
a
23
0
V-50Hz electric power suppl
y
.
C
omply with phase
/
neutral polarity sequence when power connecting the boiler.
I
nstallation standards must be complied with and they are considered as an inte
g
ral part of this booklet.
A
n easil
y
accessible two-poled switch, with a minimum
3
mm distance between contacts
,
is to be installed outside of the boiler. The
s
witch is to allow power supply cut-o
ff
in order to sa
f
ely per
f
orm maintenance and service procedures.
P
ower supply to the boiler must be tted with a differential ma
g
netic-thermal automatic switch of suitable disconnection capacity.
El
ectr
i
c power supp
l
y must
b
e proper
l
y eart
h
e
d
.
T
he above mentioned sa
f
ety measure must be veri

ed. I
f
in doubt, ask a quali

ed technician to thoroughly check the power network.
W
ARNIN
G
T
he manufacturer shall not be held responsible for any dama
g
e due to failure in
g
roundin
g
the system:
g
as,
h
ydraulic, or
C
H system pipes are not suitable for grounding power networks.
3
.2.11. Room thermostat connection
(
o
p
tional e
q
ui
p
ment
)
T
he boiler is designed to be connected to an ambient thermostat
(
not supplied with the boiler
)
.
R
oom thermostat contacts must be properl
y
sized in compliance with a load of 5 mA load at
24
V
dc
.
A
mbient thermostat wirin
g
must be connected to the relevant terminal board (see electric layout), after removin
g
the
j
umper supp
li
e
d
as stan
d
ar
d
w
i
t
h
t
h
e
b
o
il
er.
T
he ambient thermostat wirings are N
O
T to be grouped together with power mains supply cables.
3
.3. Loadin
g
the system
O
nce all boiler connections have been completed,
C
H system can be lled.
T
he procedure is to be cautiously carried out, followin
g
each step:
-
open the air pur
g
in
g
valves on all radiators and verify the boiler automatic valve operation;
-
gradually open the relevant loading tap
(
pic.
2
)
, checking all automatic air purging valves installed in the system properly work;
-
c
l
ose a
ll
ra
di
ator a
i
r purg
i
ng va
l
ves as soon as water starts com
i
ng out;
-
check boiler water pressure
g
au
g
e not to exceed 1 / 1.
3
bars readin
g
;
-
shut the loadin
g
tap and bleed any air out a
g
ain, by openin
g
the air bleedin
g
valves on radiators;
-
start the boiler and bring the system to working temperature, stop the boiler and wait
f
or the pump to stop, then repeat the air blee
-
di
ng proce
d
ures;
-
allow the s
y
stem to cool and restore water pressure to 1 / 1.
3
ba
r
s
.
W
ARNIN
G
A
s
f
ar as
d
omest
i
c
h
eat
i
ng systems treatment o
f
water
i
s concerne
d
,
i
n or
d
er to opt
i
m
i
ze per
f
ormance an
d
sa
f
ety, to
p
reserve t
h
ese con
di
t
i
ons over t
i
me, to ensure
l
ong-
l
ast
i
ng regu
l
ar operat
i
on o
f
aux
ili
ary equ
i
pment as we
ll
, an
d
to m
i
n
i
m
i
ze
e
ner
g
y consumption, thereby inte
g
ratin
g
current local laws and standards it is advisable to use specific products that are
s
uitable for multi-metal
p
lants.
W
ARNIN
G
T
he safety low water pressure switch will not
g
ive electric consensus to the burner turn on procedure when water pressure
i
s below 0,4/0,6 bar. CH water pressure is not to be less than 0,8/1 bar. Restore proper value as needed, via the loadin
g
tap
w
hich is
p
rovided as standard with the boiler
(p
ic. 2
)
. The
p
rocedure is to be followed while the s
y
stem is cold. The
p
ressure
g
auge fitted on the boiler control panel indicates the pressure in the
C
H system.
W
ARNIN
G
A
fter lon
g
inactivity of the boiler has its pump may be stuck. Before startin
g
up the boiler, make sure that the pump is operati
-
v
e,
b
y t
h
e
f
o
ll
ow
i
ng proce
d
ure:
-
remove t
h
e
b
o
il
er cas
i
ng;
-
unscrew the
p
rotective ca
p
at the centre of the
p
um
p
motor;
-
p
ut a screwdriver into the hole and manuall
y
rotate the
p
um
p
shaft clockwise;
-
once the unblockin
g
operation is completed, screw the protective cap back on and check for water leaks.
Wh
en t
h
e protect
i
on cap
i
s remove
d
, some water may
fl
ow out.
B
e
f
ore re-
i
nsta
lli
ng t
h
e
b
o
il
er cas
i
ng, ma
k
e sure a
ll
i
nterna
l
s
ur
f
aces are
d
ry.