Carrier 50EH 1100, Инструкции по установке, эксплуатации и обслуживанию, Страница: 23 / 36

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12.3 Electrical heaters
● The auxiliary electrical heaters are ready for operation in two
power stages. This heaters are managed by the electronic
control of the unit that can activate them in the following cases:
- As support in HEATING mode, following the input of all the
available compressors.
- In HEATING mode, instead of compressors.
- During the defrosting operation if selected as support.
- As support in COOLING mode in accordance with the return
and outlet temperatures.
● Assembly and connection inside the unit. The electrical heaters
acquired with the unit will be incorporated to it modifying the
electric panel in the factory, so that it is compatible with the
electronic control.
● The electrical heaters requested for units already shipped will
be sent in a kit, and the installer will need to assemble the
necessary elements for the operation of the unit to assemble
and for the compliance with the legal regulations that are
applied to the modifi ed unit in terms of safety.
Note: Consult the available capacities in the technical brochure.
Kit assembly:
When the frame with the electrical heaters is provided in a kit,
follow the steps below for connecting it:
Step 1: the resistors are sent divided into 1, 2 or 4 frames,
depending on the required power, as shown in the following
table:
To attach these frames to the unit, four supports are provided.
In the case of 2 frames, screw each one of them to 2 supports
with the 4 Allen M4 screws included in the kit.
The height of the frame on the support will depend on the position
of the discharge, since it should never be behind the fan volute.
For example, in the following diagram, the frame location will
be valid for lower and side discharge.
Step 3: Take the hoses with the electric power supplies to the
main electric panel of the unit. On the wiring diagram supplied
with the unit an illustration is included with the implantation in
the platen of all the components.
Important: The connection of the necessary elements for the
adequacy to the operation of the unit must be performed by the
installer. The kit is supplied with the required electric material:
thermistors, contactors, hoses, etc.
Output (kW) 27 36 45 54 72 90
Stages (kW) 9 + 18 18 + 18 18 + 27 27 + 27 36 + 36 45 + 45
No. of frames
1 2 2 2 4 4
Step 2: attach the supports with the frames linked inside the
unit. To that extent, drills have been made in the unit to which
the supports must be screwed.
Supports attached to the unit
Access panel
Supports
attached to
the unit
Safety thermistor
location
Holes for screws M4 for
attaching to the unit
Electric power
supply outlet
Holes for M4
screws for
attaching to the
unit
Supports for
attaching to the
unit
Holes for M4
screws for
attaching to the
unit
12 - FACTORY OPTIONS AND ACCESSORIES