Controls; Electric Heater - Carrier 42NS15 Manual De Instalación Y De Uso

HDB Control
Power supply connection (ig. 30)
Make earth connection prior to any other electrical
connections.
Disconnect the power supply to all circuits prior to handling
any electrical components.
Before proceeding with the unit connection to the mains
supply locate live L and neutral N, then make connections as
shown in the igure 30 (ref. 25, 20).
The unit can be equipped with a "CRC" wire control or an I.R.
control which are supplied as accessories. If the "CRC" control is
used connected to the terminal block ref. 33 ig. 30, disconnect
the I.R. receiver cable of connector J5 (remote) ref. D.
Connect the "CRC" cable ref. "E" in the box to connector J5
(remote) ref. "D".
Window (1WS) and presence (1ECO) control
(ig. 30c)
The window and presence contacts must be connected to the
terminal block ref. 33 ig. 30 according to the diagram.
Fault Code Description
2 Air temperature sensor
3 Changeover sensor
4 Cold Draft thermistor
5 Condensate pump error
6 Electric heater coniguration error
7 EEprom error
8 Chilled Beam coniguration error

Electric heater

The electric heaters are controlled by CARRIER type "B" and "D"

controls.

The electric heaters are equipped with two safety thermostats,
one with automatic reset, the second with manual reset, to
protect the unit against overtemperature that may happen in
case of incorrect ilter cleaning or obstructions of the air low.
NOTES:
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.
In case of failure in the electric fan, replace the electric heater
too. Only qualiied personnel should carry out this operation.
30
42N_S 42N_E
Valve connection (ig. 30d)
The valves must be connected to the terminal block ref. 33 ig.
30 according to the diagram.
Grouping connection (ig. 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 coniguration of several units (ig. 32)
Connect the units in daisy chain coniguration (white and blue
cables in parallel) for grouping. Refer to the igure below.
Fault codes:
In the case of failure and with the unit ON, the red LED on the
board starts lashing according to the fault code: 0.5 seconds
ON and 0.5 seconds OFF followed by 5 seconds OFF.
The fault code table is shown below:
To access the control box panel, remove the screw located at
the bottom of the cover and delicately bend the tab to remove
the cover. Connect the power supply to the electric heater
terminal. Size the cables according to current drawn (see table
III "Technical data of electric heater).
It is important not to obstruct the supply or air low and to
periodically check that the ilter is clean.
NOTE:
The simultaneous use of hot water and electric heater is
possible in "ONLY LOW POWER" mode. Electric heaters and
hot water can not be used in high power mode. To operate the
additional heating function you need to buy the 42N9084 kit
and connect the special sensor as described in the installation
manual. After this, the corresponding dip switch no. 5 of the
type B control must be set to ON.
Resettable
Yes
Yes
Yes
No
Yes
Yes
Yes