OJ Electronics WLTA, Руководство по установке

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Each Room sensor with manual adjustment is capable of increasing or decreasing the preset DAY & NIGHT setpoints on the master by +/- 4C for
the heating zone which it is controlling.
The Room controller WLCT has its own DAY & NIGHT temperature settings that can be set separately, and if manual Room sensors are attached to
its ”group” these will operate to the same settings as the WLCT, but still with the possibility of local ±4°C adjustment.
CHANNEL 15 OPERATION
It is possible to override all the automatic functions of the master control, and the Room controllers with a single function. This action is used for
holiday periods (e.g. to set the whole system under a frost protection mode), or to temporarily override all the temperature control of the system.
It is achieved by using the any WLTM Room sensor, as this has the override selector. If the cover is removed and the channel selector is set to F
(channel 15), that Room sensor will cease to operate its own output channel but will instead operate all the output channels of the system.
Using the WLTM Room sensor, the slide selector on the right side can be used for as follows:
Auto will allow the whole system to operate to the automatic settings.
DAY will keep the whole system working to the DAY Setpoint, but only for those Room sensors that are set for auto.
NIGHT will keep the whole system working to the NIGHT Setpoint, but only for those Room sensors that are set for either auto or day.
OFF will turn the whole system OFF, but still under a frost protection level of 5°C
NIGHT SETBACK (see also EXTERNAL SWITCH)
The external switch or timer function on the master module allows the whole system to be changed from the DAY Setpoint to the NIGHT Setpoint.
The external switch must have volt free contacts that are OPEN for NIGHT Setpoint, and CLOSED for DAY Setpoint. The factory fitted link wire is
removed when a remote switch/timer is used.
If a WLCT Room controller is employed in a part of the system, the external switch action of going to NIGHT Setpoint will override the Room
controller.
Emergency program for room control
- If a Room sensor/controller is defective or if the communication to the unit is interrupted, an alarm will be triggered. Depending on the system
configuration the regulation will continue in one of the following ways,
- If there are several units on the same channel which have a room sensor (which is still intact), the regulation will continue as before, however
without contribution from the defective unit
- If no valid room sensor/controller is found, the system will run at constantly 20% ON
- If an outdoor sensor is connected, the system will run 40% at 10°C (and Below) decreasing to 0% at 20°C (and above).
The emergency program is only valid for channels with heat control. Channels with cooling control will always run at 100% OFF in connection with
a defective room sensor.
Emergency program for supply limit sensor
- If the supply limit sensor is deffective, the system will run at constantly 20% on for the valve.
- If an outdoor sensor is connected, the system will run 40% at 10°C (and Below) decreasing to 0% at 20°C (and above).
Exercise of valves
If no automatic on/off sequence of valves or pumps occurs over a 72 hour period, an exercise of these components will take place. The actuators
will be activated for 3 minutes. The pumps will be started for 10 secs during that period, and the mixing valve, if fitted will be opened and closed.