Carel heaterSteam UR Series, Руководство пользователя

Страница: 22 / 72

22
ENG
“heaterSteam” +0300075EN - rel. 1.2 - 29.09.2015
5. SUPERVISOR NETWORK
5.1 RS 485 SUPERVISOR NETWORK
The control board of the humidifi er can be connected serially RS485 with
a remote supervisor system.
1J
2J
3J
4J
24 Vaux
L+
L-
G
N
D
Fig. 5.a
The transmission line can reach a maximum distance of 1000 metres
between the two most distant points.
Attention: for the RS485 connections in industrial (CEI61000-6-2)
environment, use shielded cable (with shield connected to PE just
on one side, either the terminal or the controller side) with maximum
shielded cable length of 30 m.
Use shielded twisted pair cable (AWG26), the 485 input stage impedance
is 1/8 unit-load (96kOhm). RS485 cables must lay in separate conduits
from the power cables.
6. PREPARING FOR OPERATION
Attention: upon installation completion, drain the supply pipe for
around 30 minutes by passing water directly through the pipe
and without introducing it into the humidifi er. This will allow the
elimination of any scoria and processing residues that may cause the
formation of foam during the boiling.
6.1 Preliminary checks
Before starting the humidifi er, check that:
•
the water and electrical connections are made and the steam
distribution system is confi gured according to the instructions
contained herein;
•
the shut-off tap for water into the humidifi er is open;
•
the power fuses are installed and in tact;
•
terminals 7I and 8I are connected by jumper or connected to the
remote ON/OFF contact, and that the latter is closed;
•
the probes or the external control device are correctly connected
(and that the ground of these devices is electrically connected to the
ground of the main control board);
•
the steam outlet pipe is not choked;
•
in the event of ducted humidifi cation, the operation of the humidifi er
is slave to the operation of the air fan (replacing or in series with the
remote ON/OFF contact);
•
the distributor condensate return pipe is installed and free;
•
the drain pipe is correctly connected and free.
Attention: before starting the humidifi er, check that it is in
perfect condition, that there are no water leaks and that the
electrical parts are dry. Do not supply voltage if the humidifi er is damaged
or even partially wet!
6.2 Removing the heating element centring
spring (only for three-phase models)
To prevent the heating elements in three-phase models hitting each
other or against the internal wall of the cylinder and thus damaging
the appliance, due to vibrations or bumps during transport, the heating
elements are factory-fi tted with a centring spring, which has no function
during the operation of the appliance. As the centring spring may hinder
the removal of lime-scale from the elements and diminish the interval
between cleaning cycles, the spring should be removed before the
initial start-up. To do this, remove the cylinder by following the relative
instructions (see Maintenance of the cylinder).