Carel HeaterSteam 4 UR002, User Manual

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70
ENG
“heaterSteam” +0300087EN - rel. 1.4 - 22.01.2021
Drain pump
Models UR002-UR013
Procedure:
•
remove the boiler as shown in par. 6.4;
•
identify the drain pump on the base of the humidifi er, unthread the 3
screws (V) and remove it;
•
check the condition of gasket (G) and replace it, if required.
V
G
Fig. 14.w
Models UR020-UR080
Procedure:
•
unthread the 2 screws (V), remove the cover (C) and the drain pump;
•
Check the condition of gasket (G) and replace it, if required.
V C
G
Fig. 14.x Fig. 14.y
Solid state relay (SSR)
The solid state relays (number depending on the model) can be damaged
in two ways: by short-circuit or burn-out. With regard to power supply,
the possible consequences are: continuous conduction or permanent
opening. In the event of malfunctioning, check the conduction of the
relay using a tester.
!
Fig. 14.z Fig. 14.aa
Fan
SSR relays are cooled by a fan. This is located at the base of the humidifi er,
for models UR002-UR013; at the top right of the unit for models UR020-
UR080. With insuffi
cient ventilation the temperature of the electrical
panel may rise excessively until it reaches 65°C. Power to the solid-state
relays is cut off by a special Klixon (heat sensor) with manual reset (see the
wiring diagram), without signalling the intervention.
In this case, check:
•
if an SSR thermal breaker has been triggered;
•
that the controller supplies 24 Vac to the fan. On models U002-UR013
a 24 Vdc rectifi er card is used to power the fan.
F
F
Fig. 14.ab Fig. 14.ac
If the fan is faulty:
Models UR002-UR013:
•
replace it after having unthreaded the fastening screws;
Models UR020-UR080:
•
unscrew the 4 fastening screws placed on the right side of the
structural work and extract the fan from the inside of the panel.
In case of malfunction, the thermal switch can be replaced unscrewing
the fastening screws.
Note :
•
for models UR002-UR013 the fan is of suction type;
•
for models UR020-UR080 the fan is of exhaust type.
14.8 Mechanical discharge of water in the
cylinder
Discharge by gravity without turning on the humidifi er is recommended if:
•
the humidifi er is out of order
•
it is required to empty the cylinder without turning on the humidifi er.
Procedure:
•
make sure the humidifi er is not powered;
•
remove the front panel;
•
enable the mechanical device located below the cylinder (A).
Models UR002-UR013
A
Fig. 14.ad