We thank you for choosing an LAE controller. Before proceeding to the installation of the CDC 12, please read this instructions sheet carefully;
only in this way you will obtain maximum performances and safety.
1. INSTALLATION
1.1 The CDC122T1R2 and CDC122T1R3B have got a size of 77x35x77 mm (WxHxD), while the CDC122T1R3G and CDC122T1R3J have got a
size of 77x35x97 mm (WxHxD). The instrument is inserted into the panel through a 71x29 mm hole and secured via the suitable brackets exerting
corret strength. The rubber gasket must be placed between the panel and the instrument front, so please make sure that there are no gaps allowing
liquid infiltrations.
1.2 The unit works with an ambient temperature between -10°...+50°C and 15%...80% relative Humidity. To reduce the effects of electro-magnetic
interference, place the cables carrying signals (probes and serial connections etc.) and the controller as away as possible from power lines.
1.3 Probes, power supply, inputs and outputs must be wired strictly following the diagram indicated on the enclosure, where the maximum loads also
appear. For supply voltage, the suitable transformer (mod. TRxxx) must be used.
1.4 Probe T1 measures air temperature and is used for the thermostat function; probe T2 measures the evaporator temperature and must be secured
to it on the place where the maximum frost growth occurs.
1.5 The remote defrost start input needs an external activation voltage between 10 … 16Vac, 10mA. When this voltage is applied to the input,
defrost is started.
1.6 The RS485 serial communication port or, if fitted, the TTL ouput for the remote display is available on the DATA connector. PIN 1 is identified by
a dot.
Caution:
• If the relays switch a large load frequently, we suggest you contact us to obtain information about the relay contact life.
• Where delicate or valuable products have to be maintained under strict conditions, please use a different controller for limit and alarm functions.
2. CONTROL PARAMETERS
The adaptation of the CDC 12 to the system that it controls is achieved through the parameters in the SETUP. Access to the parameters is obtained
by pressing + + for 4 seconds. Scroll through the parameters by pressing or until you select the desired one. Check its value by means
of and change it via + or . Exit from the SETUP occurs after 10 seconds of no key activation. To help yourself during programming, refer
to the following table.
SPL minimum programmable temperature [-50 ... +150°]
SPh maximum programmable temperature [SPL ... +150°]
hyS thermostat on switching hysteresis [+01 ... +20°K]
coF cooler minimum off time [00 ... 10 minutes]
con cooler minimum on time [00 ... 10 minutes]
cdc cooler safety run in case of probe failure [00=off ... 10(0)%=always on]
crS cooler re-start delay after power failure [00 ... 120 seconds]
drE hours between two defrosts [01 … 99 hours]
dLi defrost limit temperature [+01 ... +70°]
dto defrost time-out [01 ... 120 minutes]
drP drain time [00 ... 10 minutes]
diS display control during defrost [-01=”dEF”; 00=”T3”; 1... 30 minutes=timed “dEF”]
dty defrost type [FAn=off cycle; ELE=electrical; GAS=hot gas]
doP time count for defrost optimisation [con=continuous; Acc=frost accumulation]
Fct evaporator fan control [-01=always on; 00=on/off with cooler; 1... 10 minutes=delayed off]
FrS fan re-start after defrost [-50 ... +150°]
Fid ventilation during defrost [00=off; 01=T2<FrS; 02=always on]
Alo low alarm threshold [-50 ... +150°]
Ahi high alarm threshold [ALo ... +150°]
AdL temperature alarm delay [-01=excluded; 00... 120 minutes]
Ain alarm temperature selection [temperature 1, 2, 3]
oS1 thermostat probe offset [-20 ... +20°K]
oS2 evaporator probe offset [-20 ... +20°K]
oS3 displayed probe offset [-20 ... +20°K]
SiM slowdown of displayed temperature [00 ... 200]
Adr peripheral number [00 ... 255]
INSTRUCTIONS FOR INSTALLATION AND USE.
CDC122T1R2
CDC122T1R3B
CDC122T1R3G
CDC122T1R3J
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