Carrier 42N_S Installation And Operation Manual

Also see for 42N E Series: Installation and operation manual Installation and operation manual

Carrier 42N_S Installation And Operation Manual Manual pdf 30 page image

30 42N_S 42N_EEnglishPower supply connection (fig. 30)t Make earth connection prior to any other electrical connections.t Disconnect the power supply to all circuits prior to handling anyelectrical components.t Before proceeding with the unit connection to the mains supply locatelive L and neutral N, then make connections as shown in the figure 30(ref. 25, 20).t The unit can be equipped with a “CRC” wire control or an I.R. controlwhich are supplied as accessories. If the “CRC” control is usedconnected to the terminal block ref. 33 fig. 30, disconnect the I.R.receiver cable of connector J5 (remote) ref. D.t Connect the “CRC” cable ref. “E” in the box to connector J5 (remote)ref. “D”.Window (1WS) and presence (1ECO) control(fig. 30c)The window and presence contacts must be connected to the terminalblock ref. 33 fig. 30 according to the diagram.Valve connection (fig. 30d)The valves must be connected to the terminal block ref. 33 fig. 30according to the diagram.Grouping connection (fig. 31)The communication card must be inserted into the special connector“communication J8” provided on the card.For more information refer to the manual provided with the grouping kit.Grouping configuration of several units (fig. 32)Connect the units in daisy chain configuration (white and blue cablesin parallel) for grouping. Refer to the figure below.Fault codes:In the case of failure and with the unit ON, the red LED on the boardstarts flashing according to the fault code: 0.5 seconds ON and 0.5seconds OFF followed by 5 seconds OFF.The fault code table is shown below:HDB ControlFault Code Description Resettable2 Air temperature sensor Yes3 Changeover sensor Yes4 Cold Draft thermistor Yes5 Condensate pump error No6 Electric heater configuration error Yes7 EEprom error Yes8 Chilled Beam configuration error YesThe electric heaters are controlled by CARRIER type “B” and “D” controls.The electric heaters are equipped with two safety thermostats, onewith automatic reset, the second with manual reset, to protect the unitagainst overtemperature that may happen in case of incorrect filtercleaning or obstructions of the air flow.NOTES:t In the size 15 unit with “HIGH -LOW POWER” heating element,the ULOW and LOW speed wire (RED AND YELLOW MOTOR WIRE)must be disconnected and insulated.t In case of failure in the electric fan, replace the electric heater too.Only qualified personnel should carry out this operation.To access the control box panel, remove the screw located at thebottom of the cover and delicately bend the tab to remove the cover.Connect the power supply to the electric heater terminal. Size thecables according to current drawn (see table III “Technical data ofelectric heater).It is important not to obstruct the supply or air flow and toperiodically check that the filter is clean.NOTE:The simultaneous use of hot water and electric heater is possiblein “ONLY LOW POWER” mode. Electric heaters and hot water cannot be used in high power mode. To operate the additional heatingfunction you need to buy the 42N9084 kit and connect the specialsensor as described in the installation manual. After this, thecorresponding dip switch no. 5 of the type B control must be set toON.Electric heater