2.1. Analog inputs: there are 2 inputs for PTC sensors with reinforced electric insulation for temperature monitoring;
2.2. A digital fire alarm input (the decision is made according to "closed/open" state, closed state corresponds to the running order, open state corresponds to the fire alarm signaling);
2.3. Two digital inputs for air conditioner fault sensors (if closed the air conditioner is faulty);
2.4. Main outputs:
- two-way break-before-make relay output for the 1st climate device control - 8A 250V at cosφ=1;
- a normally open relay output for the 2nd climate device control - 8A 250V at cosφ=1;
- a normally open relay output for the electric heater control - 8A 250V at cosφ=1;
- an opto-relay output to start the alarm signaling - 100 mA ~AC or =DC;
2.5. Temperature resolution - 0.1 ° C;
2.6. Nominal supply voltage: one-phase voltage is 220V/ 50Hz or three-phase voltage is 380V/ 50Hz;
2.7. Operating voltage: 160V - 330V;
2.8. Power consumption is no more than 5Wt;
2.9. Enclosure: IP40;
2.10.Terminal block enclosure: IP20;
2.11. Operating temperature: -10 °C to +55 °C;
2.12. Storage temperature: -45 °C to +75 °C;
2.13. Weight is no more than 0,3kg;
2.14. Mounted on the standard 35 mm DIN-rail;
2.15. Mounting position is arbitrary.
2.16. Operating controls and the dimensions of the device are shown on fig.1.
3.1. Connect 1st air conditioner, 2nd air conditioner,
electric heater, fire alarm sensor, alarm signaling and temperature
sensors according to fig.2.
3.2. Plug-in the MCK-301-6.
3.3. Power ON and set required operation modes according to the table 2.
Fig. 1. MCK-301-6 front panel, indications and buttons
diagram.
Fig. 2. The MCK-301-6 connections to the three-phase
mains supply.
At the initial state the MCK-301-2 indicator displays the current indoor temperature as the average value of the temperature sensor ¹1 and the temperature sensor ¹2. On one of the temperature sensors fault the indicator shows the temperature measured by the serviceable sensor and an error code for the faulty temperature sensor.
The controller provides three control levels:
4.2. Keyboard locking level
Only viewing of the following parameters is available on this level:
- temperature setting, SP;
- temperature of the first temperature sensor, tS1;
- temperature of the second temperature sensor, tS2.
To view parameters one needs to press simultaneously the DOWN
and the UP buttons, the parameters scrolling is performed by the DOWN
and the UP buttons, to access a parameter it's necessary to press the
SET button.
When the keyboard is locked any button pressing (except simultaneous the UP and the DOWN buttons pressing) makes to appear the LOC label on the indicator. To unlock the keyboard the SET button is pressed. The "SET" LED lights up, and label "0" is blinking on the indicator. By the UP and DOWN buttons user enters a password digit from 1 to 9 and presses the DEF button. If the password is correct, the keyboard is unlocked. If after the keyboard unlocked no button is pressed during 16 sec and the lockage setting is not released by user, the keyboard is relocking.
4.3. User level with keyboard unlocked
This level allows:
- to change and to view the user level parameters;
- to view the adjuster level parameters.
To view and to change the user level parameters one
needs to press the SET button, then "SET" LED will glow. Parameters
scrolling is performed by the DOWN and UP buttons, to access a parameter
one needs to press the SET button, parameters changing is effected by
the DOWN and UP buttons, to set the parameter and go back into the MENU
one needs to press the DEF button, going back to the menu without parameter
setting is effected by the SET button. If no button is pressed during
16 sec the MCK-301-6 goes into the initial state.
4.4. Adjuster level
To access the adjuster level one needs to press and hold down SET button for 5sec. If the level is protected by a password, the label PAS appears on the indicator. Then press the SET button again. The "SET" LED lights up and the label "000" starts blinking on the indicator. Step-by-step enter three digits (from 1 to 9) of the adjuster password, pressing the DEF button after each digit has been entered. If the password is incorrect, the PAS label lights on (S is blinking), and the MCK-301-2 goes back to the initial state in 16 sec, otherwise the first parameter of the adjuster menu appears on the indicator.
Parameters scrolling is performed by the DOWN and UP buttons, to access a parameter one needs to press the SET button, parameter changing is effected by the DOWN and UP buttons, to set a parameter and go back into the menu one needs to press the DEF button, going back to the menu without parameter setting is effected by the SET button. If no button is pressed during 16 sec the MCK-301-2 goes into the initial state.
On the adjuster level the access to any user level parameter can be inhibited or permitted by simultaneous the SET and DOWN buttons pressing. If the access is inhibited a point indication appears on the right digital indicator when one is viewing the parameter value.
5. The MCK-301-2 modes of operation
5.1. The controller provides the following modes of operation:
- connected electric heater thermostat conditions;
- air conditioning zone control thermostat conditions;
- alarm conditions;
- testing conditions.
5.2. Connected electric heater thermostat conditions (rrt=0)
5.2.1. If two air conditioners are connected to the MCK-301-6
and the parameter nCo=2, the air conditioners are working in such mode
of operation as "a main air conditioner - a stand-by air
conditioner". The ttC parameter specifies the operating time for
each air conditioner. After
the time has expired the other air conditioner starts working.
5.2.2. Parameters SP (Set Point - check point), t_H
(relative value of lower temperature threshold), tC1 (relative value
of the first upper temperature threshold), tC2 (relative value of the
second upper temperature threshold) specify the indoor temperature conditions.
If the indoor temperature exceeds the programmable SP+tC1 parameter,
the air conditioner that is the main one at the moment will be ON and
it will operate until the indoor temperature drops below Set Point.
If the indoor temperature exceeds SP+tC1+tC2, the stand-by
air conditioner is ON.
The stand-by air conditioner cut-out moment is specified by
the stand-by air conditioner selected conditions. In the 1 conditions
(CoC=0) it cuts-out when Set Point temperature is achieved. In the 2
conditions (CoC=1) it cuts-out after SP + tC1 temperature is reached
when the programmable time delay Ctt has expired.
EXAMPLE. According to factory settings SP=18, t_H=3,
tC1=4, tC2=3:
- lower temperature threshold is SP-t_H=18-3=15 (electric heater ON-temperature
is 14, 9 °C);
- the first upper temperature threshold is SP+tC1=18+4=22 (cut-in
temperature of main air conditioner is 22,1 °C);
- the second upper temperature threshold is SP+tC1+tC2=18+4+3=25 (cut-in
temperature of stand-by air conditioner is 25,1 °C).
5.3. Air conditioning zone control thermostat conditions
In this mode of operation the air conditioners control
complies with 5.2, but the electric heater relay operates as the air
conditioning zone control relay. This zone is specified by the lower
(LAE parameter) and the upper (HAE parameter) thresholds.
If the room temperature is within air conditioning zone limits (between
the lower and the upper thresholds), the relay contacts are closed.
If the room temperature is outside the air conditioning zone limits,
the relay contacts are open.
5.4. Alarm conditions
5.4.1. If both temperature sensors are faulty both air conditioners
are ON, the indicator sequentially shows temperature sensor fault codes,
Erd code and alarm will be ON.
5.4.2. In the thermostat conditions the controller performs
a room temperature monitoring and is checking whether a room temperature
has been outside preset limits (HAL and LAL parameters)
If the indoor temperature exceeds user-preset temperature (HAL parameter)
the indicator shows A1 code and the alarm will be ON.
If the indoor temperature drops below user-preset temperature
(LAL parameter) the indicator shows A2 code and the alarm will be ON.
To disable premature alarm trippings for temperature
tAO and PAO parameters are used. tAO is alarm tripping time delay for
temperature (in minutes) and PAO is alarm tripping time delay for temperature
after power has been applied (in hours).
5.4.3. If air conditioner safe operation control is
allowed (dAc=1) the faulty air conditioner is OFF and the stand-by air
conditioner is ON. On return the faulty air conditioner to normal operating
conditions the MCK-301-6 reverse the air conditioners.
5.4.4. If fire alarm sensor analysis is allowed (dAc=1) the
fire alarm cuts-in (the 5, 6 contacts open), all climate devices cut-out
and the Fir code is displayed on the indicator.
5.4.5. All fault state codes are displayed on the
digital indicator according to the Table 1.
Fault codes
Table 1.
| Fault signals on the indicator |
Alarm signals on the indicator |
| Fault in controller |
Er1 |
Temperature is higher then the maximum temperature threshold |
A1 |
| Sensor 1 is disconnected |
Er2 |
Both temperature sensors are faulty |
|
Erd |
| Short-circuited sensor 1 |
Er3 |
Fire alarm sensor goes off |
Fir |
| Sensor 2 is disconnected |
Er4 |
Faulty air conditioner 1 |
CO1 |
| Short-circuited sensor 2 |
Er5 |
Faulty air conditioner 2 |
CO2 |
| |
|
Both temperature sensors are faulty |
Erd |
NOTE: If several faults take place
simultaneously the fault codes are displayed on the MCK-301-6 indicator
sequentially one after another.
5.4.6. If any of faults referred to above occur the controller triggers
alarm system (the 16,17 contacts open).
5.5. Testing conditions
To go to the testing conditions the SET and the DOWN buttons should
be pressed for 2 sec. Then the indicator displays tES code and both
compressor relays are energized and the alarm relay is de-energized.
The electric heater relay is energized if the MCK-301-6 is in the connected
electric heater thermostat conditions. If the MCK-301-6 is in the air
conditioning zone control thermostat conditions then the electric heater
relay is de-energized. The testing mode of operation is off when 15-sec
delay after the buttons were released has expired.
6. Programmable and used parameters are given in table 2.
Table 2
| Settings and read-off parameters |
Code Param eter |
Mini- mum values |
Maxi- mum values |
Facto- ry Setting |
Operation |
| Temperature control Temperature SP
|
SP |
0°C |
35°C |
18°C |
Setting (user-specified room
temperature) |
| Thermostat conditions |
Rtr |
0 |
1 |
1 |
0 - connected electric heater
thermostat conditions;
1 -- air conditioning zone control thermostat conditions |
| Stand-by air conditioner |
Coc |
0 |
1 |
1 |
0 -standby air conditioner cuts-out
when SP temperature has been reached;
1 - standby air conditioner cuts-out when after Ctt time from
the moment when (SP + tC) temperature is reached has expired |
| Programmable time delay for standby air conditioner cut-out |
Ctt |
0 min |
60 min |
15 min |
|
| Lower temperature threshold |
t_H |
0°C |
20°C |
3°C |
|
| First upper fault temperature threshold |
tC1 |
0°C |
20°C |
4°C |
|
| Second upper fault temperature threshold |
tC2 |
0°C |
20°C |
3°C |
|
| 1st temperature sensor calibration |
CA1 |
-9.9°C |
9.9°C |
0 °C |
CA1 scale shift from temperature read by 1st sensor |
| 2nd temperature sensor calibration |
CA2 |
-9.9°C |
9.9°C |
0°C |
CA2 scale shift from temperature read by 2nd sensor |
| Upper fault temperature |
HAL |
10°C |
50°C |
30°C |
The maximum temperature. If exceeded the alarm signaling for temperature
is ON. |
| Lower fault temperature |
LAL |
-10°C |
50°C |
0°C |
The minimum temperature.
Below this temperature the alarm signaling for temperature is ON.
|
| Lower fault temperature control |
rlA |
0 |
1 |
1 |
0 - forbidden;
1 - permitted |
| Upper air conditioning zone threshold |
HAE |
0°C |
50°C |
25°C |
|
| Lower air conditioning zone threshold |
LAE |
0°C |
50°C |
10°C |
|
| Fault temperature delay |
tAO |
0 |
90 min |
30 min |
|
| Fault temperature delay after power has been ON |
PAO |
0 |
48 hours |
1 hour |
|
| Minimum air conditioner cut-in delay |
c01 |
1 min |
15 min |
1 min |
Air conditioner protection from frequent cuts-in |
| Minimum air conditioner cut-out delay |
c02 |
1 min |
15 min |
1 min |
Air conditioner protection from frequent cuts-in |
| Minimum electric heater cut-in delay |
n01 |
1 min |
15 min |
1 min |
Electric heater protection from frequent cuts-in |
| Minimum electric heater cut-out delay |
n02 |
1 min |
15 min |
1 min |
Electric heater protection from frequent cuts-in |
| Delay between air conditioner cut-out and electric heater cut-in
or between electric heater cut-out and air conditioner cut-in |
cnt |
0 min |
30 min |
5 min |
Heat oscillatory process prevention |
| Analysis resolution of air conditioner safe operation sensors
|
dAc |
0 |
1 |
1 |
0 – air conditioner safe operation sensors are off;
1-- air conditioner safe operation sensors are on. |
| Fire alarm sensor analysis resolution |
dAF |
0 |
1 |
1 |
0 – fire alarm sensor is off;
1 – fire alarm sensor is on. |
| Number of connected air conditioners |
nCO |
0 |
2 |
2 |
|
| Delay of status change of working air conditioner |
ttC |
24 hours |
72 hours |
24 hours |
|
| User access code |
LOC |
0 |
9 |
0 |
0 - keyboard is unlocked
1-9 - user password
|
| Adjuster access code |
PAS |
000 |
999 |
123 |
000 - access to adjuster level is allowed;
000-999 - adjuster password.
|
| Temperature sensor type |
tPd |
0 |
1 |
1 |
0 - NTC,
1 - PTC
|
| Air conditioner fault sensor type | tPC |
0 | 1 | 1 | 0 -"no fault" signal: sensor contacts are open;
1 - "no fault" signal: sensor contacts are closed.
|
| Controller version |
rEL |
|
|
60 |
|
