3006411-2022-04-25 Note 8.3.2 Heating coil HCW Error on unit 0% No Operation To avoid the electric heating coil dropping out due to an overheating alarm when the electric heating coil is stopped: ● Do not exit the menu or stop the supply air fan until Run-on is shown as "No" . For water heating coil HCW : If there are no current faults for the heating coil ("Fault on unit" shown as "No"), forced start may be activated: ● Enter an output level for HCW to start the motor valve and pump for the water heating coil 8.3.2 Heating coil COCW 0% Heat./Cool. Heating Analogue output 0,0V Error on unit No For water heating coil MCOCW If there are no current faults for the heating coil ("Fault on unit" shown as "No"), forced start may be activated: ● Enter an output level for MCOCW to start the motor valve and pump for the water heating coil ● Select "Heating" for choice of heating or cooling state. Menu 8.3.3 Cooling unit 8.3.3 Cooling unit CCW Error on unit 0% No (The menu screen is different depending on which cooling unit is selected - CH, CCH, CCW, MXCU, MXHP) If there are no current faults for the cooling unit ("Fault on unit" shown as "No"), forced start may be activated: ● Set the output level for the cooling unit Menu 8.3.4 Dampers and relays 8.3.4 Dampers and relays LSF > LSA > RGS/AUX OUT > Alarm relay > VDI light > BP1 [2.00V] > BP2 [2.00V] > RAD [2.00V] > Off Off Off Off Off 2.00V 2.00V 2.00V The following dampers may be forced open or closed via the menu: ● LSF (closing damper, outdoor air) ● LSA (closing damper, exhaust air) ● RGS/AUX OUT (flue gas damper) ● The alarm relay may be forced to trigger. ● The light in units fitted with VDI lights may be switched on and off ● BP1 (bypass damper 1) ● BP2 (bypass damper 2 - only VEX340-350-360-370) ● BP3 (bypass damper 3 - only VEX370) ● RAD (return air damper - only VEX340). Menu 8.4 - Calibrating MPT NB: The pressure transducers (MPT) may only be calibrated when the unit is stopped. The doors should be opened to equalise pressure with the surroundings and to ensure correct calibration. ● Select "Yes" for calibration (automatically changes to "No" again when the MPTs have been calibrated). 67/120
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