ModBus - Direct access with Modbus connection to set, conﬁgure and - monitor the 30 RBV/RQV Input remote contact : - Remote On/Off Contact - Remote Heat/Cool Contact: This switch is used to select the Cooling Mode (contact opened) or the Heating Mode (contact closed). - Remote Economic Contact: This switch is used to select the regular Home Mode when contact is opened or the Economic Away Mode when contact is closed. - Safety Input Contact: This switch is normally closed type, according to conﬁguration it is used either to stop the unit, to ban the Heating Mode or to ban the Cooling Mode when contact is opened. Large choice of Input Contacts Several functions can be conﬁgured by the installer. They allow to adapt to the environment of the machine: - Power Limitation / Night Mode: This switch is used to reduce the compressor maximum frequency to avoid noise. - Off Peak: If the General Purpose Contact, conﬁgured to “Off Peak”, is closed then the Electric Heat Stages are not allowed. - Loadshed Request: If the General Purpose Contact, conﬁgured to “Loadshed Request”, is closed then unit shall be stopped as soon as possible.
Solar Input: If the General Purpose Contact, conﬁgured to “Solar Input”, is closed then the unit is not allowed to run in Heating or DHW Mode because hot water is produced from a solar source. - DHW Request Switch from tank : When this input is closed, the Domestic Hot Water production is requested (need DHW sensor delivered in accessory). - DHW Priority : When this input is closed, the unit is switching to Domestic Hot Water production regardless of the Space Heating demand and the current DHW schedule (need DHW sensor delivered in accessory). - Anti-Legionella Cycle Request : When this input is closed, the Domestic Hot Water production is requested with the Anti-Legionella setpoint. - Summer Switch : This switch is used to select the Winter (contact opened) or the Summer Mode (contact closed). - Energy Meter Input : This input is used to count the number of pulses received from an external energy meter (not supplied) - External Alarm Indication Input : When this input is opened, alarm is tripped. This alarm is for information only, it does not affect the unit operation. Output remote contact available 2 Output contacts could be chosen on the NHC board, upon conﬁguration for the following purposes: alert, alarm , Standby, running (Cool), IAT Reached.
Evaporator Water Temperature Entering water temperature at start-up Leaving water temperature during operation Condenser Air Temperature Standard unit
Maximum 30 18 Maximum 46
5(1) °C Minimum -10(2)
Minimum leaving water temperature of 7°C and minimum entering water temperature of 7.5°C for air temperature of -10°C to 0°C for 30RBV 17-21 For operation at an outdoor ambient temperature below 0°C (cooling mode and heating mode), the water freeze protection should be available and / or the water loop can be protected against frost by the installer, using an anti-freeze solution.
Operating range 30RQV 17-21 units
55 45 35 25 15 5 -5 -15 0 5 10 15 20
Outside air temperature (°C)
leaving water temperature (°C)