Carrier AquaSnap Plus 30AWH004HB Installation Manual

Contents

930AWHAuxiliary accessories connection (Fig. 17)3-way valveFrequency LimitationStop Unit or Defrosting signalsExternal temperature probeThe 30AWH units drive a 3-way valve to manage a sanitarywater accumulation tank. The operating logic provides that, incase of a request for sanitary water by an accumulation tank,the system controls a 3-way valve to direct the hot water onlyto the tank and to operate at the maximum capacity to providewater at 60 °C (compatible with the operating envelope).For operation, connect the 3-way valve between PINS 18, Nand 10 of the terminal strip (see Fig. 17). PINS 18 (Line) andN (Neutral) power the valve (1ph ~ 230V, 2A max), and acommand signal (1ph ~ 230V, 2A max) is available on PIN 10.If using a valve with spring return, only connect PINS 10 and N.The sanitary water request signal must be a Dry Contact type(contact quality greater than 25mA @ 12V) that closes thecircuit between PINS 15 and 13 of the terminal strip(see Fig. 17).Attention: The sanitary water request has higher priority thanthe programmed operating mode in both heating and coolingmode.To force the unit to operate at a lower maximum frequency(to reduce noise) in the absence of a User Comfort Interface,provide a Dry Contact (contact quality greater than25mA @ 12V) between PINS 13 and 14 of the terminal strip(see Fig. 17). With the contact closed, the unit will operatewith a maximum frequency lower than the standard one,There are several signals available on the terminal strip to indicateparticular conditions or the stop of the external unit.The available signals are:• Defrosting: When operating in Heating mode, depending onthe external environmental conditions, the unit could performdefrosting cycles to clean the external battery of any iceformations. Under these conditions, it is not possible to guaranteethe requested temperature output water temperature, whichcould reduce general comfort.(PINS: 4-N or 11-N, NUI CODE: 106 or 108)• Alarm: Indicates an alarm condition that stops the compressor.If the positioning of the external unit could induce a non-representative reading of the external temperature by theprobe positioned on the machine, an additional temperatureotherwise it will operate in standard mode.For correct operation, it is necessary to configure the unitusing parameters 5 and 6 from the User Interface menu ofthe 33AW-CS1.The maximum noise reduction is about 3dB at 75% of themaximum operating frequency of the compressor.(PINS: 5-N or 11-N, NUI CODE: 147 or 108)• Ambient Temperature Reached: If suitably programmed using theUser Comfort Interface (NUI), and operating with this interface, asignal is provided that indicates that the pre-set temperature hasbeen reached. This signal can be used as the contact windownormally implemented in the fan-coils. (PINS: 5-N, NUI CODE:147)Several outputs are used for more than one condition. It is possibleto configure these outputs through the User Comfort Interfaceinstallation menu (refer to the 33AW-CS1 manual).Refer to the tables on page 11 for the correct pin-outs and use ofthe signals.Dehumidifier or HumidifierA Dehumidifier or a Humidifier can be driven by Aquasnap Plususing humidity sensor into 33AW-CS1 interface.Connect electrically a Dehumidifier or a Humidifier to N, 11terminals to a relay that drives Dehumidifier (NO contact) ora Humidifier (NC contact)Configure NUI code 108 (2 for dehumidifier /Humid.)Configure ambient humidity limit (NUI CODE 107) whereDehumidifier or a Humidifier is activated (eg. with code 107 =65, Dehumidifier is activated with ambient humidity >UR65%5% hysteresis)probe can be provided (NTC 2 wire, 3kΩ @ 25°C, Carrier code:33AW-RAS01) remote. Connect the terminals of the probebetween PINS 23 and 24 of the terminal strip (see Fig. 17).English