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SK2017 AHRI PFWSL-V/P-AECM-001
G.3.
Thermostat for W Type Control
This thermostat adopts digital control technology with large LCD display. It shows the following items: working states (cool,
heat or ventilation), the speed of fan coil, room temperature, set-point.
There are following keys on the panel:
On/Off “ ”, Mode (cool, heat or ventilation) “ ”, Fan speed (high, medium, low or auto) “
”, Temperature setting “
△
”
and “
▽
”.
OPERATION
On/Off: Press “ ” to turn on, press “ ” again to turn off thermostat and its output.
Note
：
The thermostat will turn on directly when the digital input is activated.
Setting temperature: Press “
▽
” to reduce set-point, press “
△
” to raise set-point, and 0.5
℃
changed once
；
Mode Selection: Press “ ” to change system working in cooling “ ”, heating “ ” or ventilation “ ” mode.
If No.3 parameter of Parameter B is 01, you can press “ ” to change system working in cooling “ ”, heating “ ”, ventilation
“ ” or auto changeover”
” mode.
In auto changeover mode for 2 pipe configuration, the mode will be selected automatically by the water temperature which is
measured by the external sensor (if the water temperature is less than or equal to 18
℃
, the system will work in cooling; if the
water temperature is higher than or equal to 22
℃
, the system will work in heating), the related icon will flash, and it will be
confirmed automatically after 5 seconds.
If No.3 parameter of Parameter B is 01. the fan will turn ON when external sensor is higher than or equal to 38
℃
in heating
mode,
Fan Speed Selection: Press “
” to change fan speed among “
(Hi)”, “
(Med)”, “
(Low)” or “Auto”.
Under auto fan speed “Auto”, the fan-speed will be changed automatically. Auto LOW-speed When the difference between
room-temperature and set-point exceed 1
℃
, Auto MED-speed When exceed 2
℃
, Auto HI-speed When exceed 3
℃
.
Control Motorized Valve under 2-pipe configuration: If the difference between room temperature and set-point exceed 1
℃
, FCU valve will be open; if room temperature and set-point are equal, type DA will close the FCU valve with the fan
still running, type DB will close the FCU valve and Fan both.
Control FCU Valve under 4-pipe configuration: In cooling, when the room temperature is higher than set-point, the
cooling valve will be opened. Otherwise it will be closed. Heating valve is always closed. In heating, When the room
temperature is lower than set-point, the heating valve will be opened. Otherwise it will be closed. Cooling valve is always
closed.
Note: (If No.2 parameter of Parameter A is 01)
Check the water temperature: press “ ” and hold for 3 seconds, all the Symbols will not be showed except the temperature,
and this temperature is just the water temperature. If the external sensor is damaged or not connected, E2 will be showed
and fan runs 3 minutes and then stop.
Digital input control:
When the dry contact signal is provided, the thermostat will turn off all its outputs.
DEFROST (LOW TEMPERATURE PROTECTION)
Description: when the thermostat turns off and the room temperature is lower than 5
℃
, it will be turned on
automatically in heating mode with “ ” showing, the system will be in heat mode and fan runs in high speed. The
thermostat will turn off when room temperature is higher than 7
℃
；
Set low temperature protection: Turn off the thermostat, press “ ” and “
△
” buttons simultaneously and hold for 3
seconds, it will display “00” or “01”, press “
△
” or “
▽
” key to adjust. “00” indicates low temperature protection invalid,
“01” indicates low temperature protection function valid. The default is “00”.