Daikin McQuay AWS210BDS Installation Manual Download Page 14

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IM 1167

Installation and Startup

Electrical Connections

All wiring must be done in accordance with applicable local
and national codes. Pathfinder units can be ordered with either
standard multi-point power or optional single point power
connections and with various disconnect and circuit breaker
options. Wiring within the unit is sized in accordance with the

U.S.A. National Electrical Code. Field-supplied disconnect
switches are required if not factory-supplied with the unit.

Table 8: Electric Power Connection Option

Multi-Point

Power Connection

Single-Point

Power Connection

Standard:

Disconnect switch per circuit, no

compressor isolation circuit breakers

Optional:

one power block, compressor

isolation circuit breakers

Optional:

High short circuit current rated panel

with disconnect switch and no

isolation circuit breakers

Optional:

One disconnect switch replacing

the power block, compressor

isolation circuit breakers

Optional:

High short circuit current rated

panel with disconnect switch and

compressor isolation circuit

breakers

Note: Disconnect switches are molded case construction with lockable

through-the-door handles. They can be used to remove the unit/

circuit from the power system.

Note: The individual compressor isolation circuit breakers for each circuit

isolate the compressor and do not have through-the-door handles.

They are operable only after the panel doors are opened.

Note: The high short circuit rated panel means that a short circuit current

up to the ratings shown in

Table 9, Interrupt Ratings (kAmps)

will be

contained in the panel. There is a short period of time when the

circuit breaker will

short circuit before opening a circuit that can

damage downstream components. In other words, the enclosure is

stronger than a standard enclosure. It has a high interrupt rated

disconnect switch.

Note:

The factory-mounted control power transformer is protected by fuses.

Condenser fans are protected and isolated by circuit breakers.

Table 9: Interrupt Ratings (kAmps)

Disconnecting means are addressed by Article 440 of the
U.S.A. National Electrical Code (NEC), which requires
“disconnecting means capable of disconnecting air
conditioning and refrigerating equipment including motor-
compressors, and controllers from the circuit feeder.” Select
and locate the disconnect switch per the NEC guidelines.
Maximum recommended fuse sizes are given in the electrical
data tables of this catalog for help in sizing the disconnect.

Terminals are provided in a unit control panel for optional field
hookup of the control circuit to a separate fused 115-volt
power supply in lieu of the standard factory installed control
transformer.

RapidRestore Option

This option does not require field installation. Exception: Field
supplied inputs are required in the case of a backup unit being
started after the power interruption rather than restarting the
primary unit.. A field supplied control (normally a BAS) must
turn off the Backup Chiller connection on the primary chiller
and turn on the connection on the backup chiller at the time of
switching. See the unit Field Wiring Diagram for the Backup
Unit connection point (terminals #61 and #62).

-3.3

0.996

0.998

1.036

1.097

-7.8

0.988

0.994

1.061

1.219

-13.9

0.979