Installation manual

30 Magnitude™ Frictionless Centrifugal Chillers – Model WMC IM 1029-2
Optional Harmonic Filter
The optional harmonic filters are field mounted and wired option, wired from the chiller power panel circuit
breakers out to the filter and back to the chiller’s power fuses and contactors. They limit current distortion to
less than 7% and meet IEEE 519 standards chiller power factor is improved across the entire load range. The
filters are mounted in a UL Type 1 enclosure and are UL and cUL listed. Model HG60 is wall mounted, the
balance are floor mounted.
!
WARNING
Only qualified electricians should carry out all electrical installation and maint enance wor k on the
harmonic filter.
!
WARNING
A l l wi r i ng must be i n accor dance wi th the N at i onal El ect r i cal Code ( N EC) and/or any ot her codes
that apply to the installation site.
!
WARNING
Di sconnect all power bef ore working on the equipment. Do not attempt any work on a powered
HG7 filter.
!
WARNING
T he HG7 har moni c f i l ter, dri ve, mot or, and ot her connect ed equipment must be properly grounded.
!
WARNING
A f ter swi tchi ng of f the power, al ways al l ow 5 mi nut es f or t he capaci t or s i n the H G7 f i l ter and in
the dri ve to discharge before worki ng on the HG7, the dri ve, the motor, or the connecti ng wi ri ng. It
i s a good i dea to check wi t h a v ol tmeter to make sure that al l sour ces of power hav e been
di sconnect ed and that al l capaci t ors have di schar ged bef or e begi nni ng work.
Mounting
As is the case with the chiller unit, the filter must be mounted in an indoor location suitable for a type 1
enclosure. Provide sufficient access and working space around the unit to permit ready and safe installation.
The installation must conform to all working space and clearance requirements of the National Electrical
Code (NEC) and/or any other applicable codes. Provide sufficient unobstructed space to allow cooling air to
flow through the front and sides of the unit. The filter must be mounted vertically on a smooth, solid surface,
free from heat, dampness, and condensation.
Power Wiring
Refer to the power wiring diagrams beginning on page 23. Route the conduit and wiring from the chiller
power panel to the filter and then back to the power panel. The compressor variable speed drives are located
in the compressors. The harmonic filter is provided with internal fuses. Additional fuses may be required at
the connecting point to protect the tap conductors. Refer to the National Electrical Code (NEC) and/or any
other applicable codes.
Cable Entry Locations: The harmonic filters are not provided with enclosure wiring knockouts. Typical or
recommended cable entry locations are shown on the drawings located in this section of this manual. A
selection can be made at the time of installation to best suit job conditions.
Field Wiring Connection Terminals: Compression type terminals are provided for all field wiring
connections. The control circuit terminals will accommodate 18 AWG to 10 AWG wire and should be
tightened to 7 lbs. - in. torque.
The wire size range and tightening torque for the grounding and power terminals are listed on the filter
dimension drawings.