Autotransformer - Carrier PrimeLINE 69NT40-561-200 Operation And Service Manual

2.5.8

Autotransformer

An autotransformer may be provided to allow operation on 190/230, 3-phase, 50/60 Hz power. The autotrans-
former raises the supply voltage to the nominal 380/460 volt power required by the base unit. The autotransformer
may also be fitted with an individual circuit breaker for the 230 volt power.
If the unit is equipped with an autotransformer and communications module, the autotransformer will be fitted with
a transformer bridge unit (TBU) to assist in communications.
2.5.9 Gutters
Rain gutters may be fitted over the control box and recorder section to divert rain away from the controls.
2.5.10 Handles
The unit may be equipped with handles to facilitate access to stacked containers. These fixed handles are located
on either side of the unit.
2.5.11 Thermometer Port
The unit may be fitted with ports in the front of the frame for insertion of a thermometer to measure supply and/or
return air temperature. If fitted, the port(s) will require a cap and chain.
2.5.12 Water Cooling
The refrigeration system may be provisioned for a water-cooled condenser. The condenser is constructed using
copper nickel tube for sea water applications. Refer to
2.5.13 Back Panels
Aluminum back panels may have access doors and/or hinge mounting.
2.5.14 460 Volt Cable
Various power cable and plug designs are available for the main 460 volt supply. The plug options tailor the cables
to each customer's requirements.
2.5.15 230 Volt Cable
Units equipped with an autotransformer require an additional power cable for connection to the 230 volt source. Vari-
ous power cable and plug designs are available. The plug options tailor the cables to each customer's requirements.
2.5.16 Cable Restraint
Various designs are available for storage of the power cables. These options are variations of the compressor sec-
tion cable guard.
2.5.17 Upper Air (Fresh Air Make Up)
The unit may be fitted with an upper fresh air makeup assembly. The fresh air makeup assembly is available with a
vent positioning sensor (VPS) and may also be fitted with screens.
2.5.18 Lower Air (Fresh Air Make Up)
The unit may be fitted with a lower fresh air makeup assembly. The fresh air makeup assembly is available with a
vent positioning sensor (VPS) and may also be fitted with screens.
2.5.19 Labels
Safety Instruction and Function Code listing labels differ depending on the options installed. Labels available with
additional languages are listed in the parts list.
2.5.20 Controller
Two replacement controllers are available:
1. Re-manufactured - Controller is equivalent of a new OEM controller, supplied with a 12-month warranty.
2. Repaired - Controller has had previous faults repaired and is upgraded with the latest software.
Section 3.1.6 for more information.
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