Honeywell PCR-110 - Manual (Page 5)

¼ If the unit cannot be operated without the risk of danger, it must
be taken out of service and precautions taken so that it cannot be
switched on again unintentionally.
This applies, in particular, if:
ൎ the housing has damage which is visible,
ൎ the unit is no longer operational or
ൎ it has been stored for a long time in unfavourable conditions.
¼ The unit must not be opened. If it is thought that the unit may be
defective, send it back to the dealer or manufacturer with a precise
description of the fault.
4.2 Safety precautions
¼ All electromagnetic loads (solenoid valves, contactors, horns,
motors) should be interference suppressed directly at the coil with
RC elements.
¼ Please note the maximum contact rating of the relays and
terminals.
If this is not observed, there is a risk that the contacts may pit or
stick, with the result that the refrigeration system will not operate
correctly and the refrigerated items may be damaged.
¼ Sensor leads are to be routed separately from mains voltage wires:
the clearance should be at least 5 cm.
¼ Sensor leads must not be routed in multiple cables with other leads
carrying mains voltage, otherwise the system may malfunction.
¼ Tighten the terminals carefully; excessive strain will result in
damage to the controller.
5 Installation and commissioning
5.1 Mechanical installation
¼ 4 DIN Standard modular housings to be mounted on a
standarr rail:
a) housing with 2 mounting tabs:
Open out the side mounting tabs; clip the unit on to the 35 mm rail
and press tabs in again.
b) housings with 1 mounting tab:
Put housing on the upper 35 mm rail. Clip the unit on the 35 mm
rail, lower tab clips on the rail automatically.
To remove the unit from the rail press in lower mounting tab a
screw driver, lift unit.
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