Fan Coils Units Control 25-Apr-17 Fan Coils Units Control Wall mounted, 2x2 and 3x3 cassette fancoil units MERCA, SRC and WRC

Wiring connection SRC SLM 3 or MERCA CN_DSP CN_WIR or MERCA Note: Only one application is function at one time, either wireless or wired

Wireless controller WRC-xxA Transmission LCD Display ON/OFF Switch 25-Apr-17 Wireless controller WRC-xxA Transmission LCD Display ON/OFF Switch Temperature Setting Operating Mode Fan Speed Timer Switch Setting SRC-HPA Turbo Mode “Sleep” Function Swing Real Time Clock

Simplified wired controller 25-Apr-17 Simplified wired controller SRC-xxA FWT / FWF / FWC Temperature Display Operating Mode Fan Speed ON/OFF Switch IR Receiver “Sleep” Function Timer Switch Setting Swing Temperature Setting SRC-HPA SRC-HPA

Standard wired controller 25-Apr-17 Standard wired controller MERCA FWT / FWF / FWC LCD Display Fan ON/OFF Switch Operating Mode Sleep Temperature Setting Swing SRC-HPA Real Time Clock Timer Active ON/OFF Timer

Mode Selection The PCB has 4 modes selection via jumper: Model 25-Apr-17 Mode Selection The PCB has 4 modes selection via jumper: Model Configuration Operating Modes M1 2 pipes Cooling or Heating (no Auto mode) M2 2 pipes + Aux. Htr Cooling or Heating with Aux. Htr (no Auto mode) M3 4 pipes with Boiler Cooling only or Boiler (with Auto mode) M4 4 pipe + Boiler Cooling or Heating with Boiler water (no Auto mode)

25-Apr-17 Last Memory Options for last memory setting is available by setting of J_LST. Last setting that memorized: 1. Mode and on/off status 2. Set Temperature 3. Fan Speed 4. DC & AC Swing 5. Flap stop coordinate (for DC swing off mode) For Default setting, power up is “OFF” mode, temperature setting is 24 o C, indoor fan speed is High and swing mode is off. Setting J_LST With Last Memory Setting Short Default Setting Open

Valve/Valveless Control Selection Setting Jumper Valve Valve control Short Valveless control Open Valve Jumper

Temperature range and setting 25-Apr-17 Turn ON/OFF 3 ways to turn on / off the system: 1. Via ON/Off triggering - pressing emergency ON/Off button or LCD controller ON/OFF button. Override timer setting 2. Via delay timer - Delay timer is to simulate the ON/OFF pressing after the set numbers of hours 3. Via real time ON/OFF timer - When the real time ON timer set time matches the internal real time clock, unit will switch on, similar for OFF time. The timer setting are retained so that similar switching can occur 24 hours later Temperature range and setting Temperature setting allowed in COOL, DRY, and HEAT mode Temperature range is 16 o C to 30 o C

Fan Priority Setting This option applied to Cool, Heat and Auto mode (apply only during thermostat off cycle) FAN_P Jumper Setting Jumper FAN_P User set speed or low fan if auto mode is selected Short Fan stop when thermostat cuts off Open

Bar Heat Mode Setting This setting is to bar user from using Heat mode Jumper Heat Heat mode allow to use Short Bar Heat mode Open Heat Jumper

Sleep Mode Only available for COOL & HEAT modes - 25-Apr-17 Sleep Mode Only available for COOL & HEAT modes - This function will increase (cooling mode) or decrease (heating mode) the set temperature with time The option can be set or reset by the LCD or LED controller. Activation of Emergency switch will reset this option .

25-Apr-17 Sleep Mode Sleep Mode: energy saving option while optimising comfort conditions by temperature adjustment In cooling mode, this function will prevent excessive cooling during summer season After the first 1/2h, T0°→ T0° + 0,5°C After 1h, T0°→ T0° + 1°C After 2h, T0°→ T0° + 2°C In heating mode, this function will prevent night sweat After the first 1/2h, T0°→ T0°-1°C After 1h, T0°→ T0°-2°C After 2h, T0°→ T0°-3°C Energy Saving Comfort Temperature profile – Sleep Mode Sleep Mode activated SRC-HPA Sleep Mode activated

Cool Mode - With Water Valve 25-Apr-17 Cool Mode - With Water Valve Water valve will cut in if the Tr >= Ts + 1 C. Water valve cut out if Tr=<Ts. Thermostat cut in or out is decided every 30 seconds. In this mode, indoor fan will follow jumper FAN_PRIO setting. If jumper FAN_PRIO is ON:- - For manual fan speed setting, indoor fan will run as per user set speed. - In AUTO FAN, the indoor fan speed will run as follows: Tr: room T° Ts: T°set

Cool Mode - Without Water Valve Fan speed decision is made every 30 seconds. Fan speed will run as the following diagram Manual fan speed Auto fan speed

Heat Mode - With Water Valve 25-Apr-17 Heat Mode - With Water Valve Water valve will cut in if the Tr =< Ts - 1 C. Water valve cut out if Tr<=Ts. Thermostat cut in or out is decided every 30 seconds. If jumper FAN_PRIO is ON:- - For manual fan speed setting, indoor fan will run as per user set speed. - In AUTO FAN, the indoor fan speed will run as follows: Tr: room T° Ts: T°set

Heat Mode - Without Water Valve Fan speed decision is made every 30 seconds. Fan speed will run as the following diagram Manual fan speed Auto fan speed

25-Apr-17 Pipe Water Temperature Sensor (Indoor Coil Sensor) Cool Mode - With Water valve Water valve and indoor fan at set fan speed will be forced to cut in minimum 2 minutes irrespective of thermostat cycle during power on reset / change mode/unit recover from fault

Pipe Water Temperature Sensor (Indoor Coil Sensor) Cool Mode - Without Water valve Indoor fan is forced to run at low speed for at least 2 minutes irrespective of thermostat cycle during power on reset / change mode / unit recover from fault

Pipe Water Temperature Sensor(Indoor Coil Sensor) Heat Mode - With Water valve Water valve will be forced to cut in minimum 2 minutes irrespective of thermostat cycle during power on reset / change mode / unit recover from fault

Pipe Water Temperature Sensor(Indoor Coil Sensor) Heat Mode - Without Water valve Indoor fan is forced to run at low speed for at least 2 minutes irrespective of thermostat cycle during power on reset / change mode / unit recover from fault

Fault Diagnostics Errors Cool LED 7 Segment Indicator 25-Apr-17 Fault Diagnostics Errors Cool LED 7 Segment Indicator Rooms sensor error (short/open) 1 blinks E1 Pipe water sensor error (short/open) 2 blinks E2 Water pump error 6 blinks E6 Pipe water temperature fault 5 blinks E5