Carel heaterSteam UR Series - Supervisor Network and Operation Preparation; Pre-Operation Checks and Preparations

22
ENG
“heaterSteam” +0300075EN - rel. 1.2 - 29.09.2015
5. SUPERVISOR NETWORK
5.1 RS 485 SUPERVISOR NETWORK
The control board of the humidi er can be connected serially RS485 with
a remote supervisor system.
1J 2J 3J 4J
24 Vaux
L+
L-
GND
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 humidi 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 humidi er, check that:
• the water and electrical connections are made and the steam
distribution system is con gured according to the instructions
contained herein;
• the shut-o tap for water into the humidi 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 humidi cation, the operation of the humidi 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 humidi 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 humidi 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- 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).