Jetson FWCD Series, Installation Operation & Maintenance, Page: 17 / 96

Jetson
www.JetsonHVAC.com
17
D = Distribution Panel Connection = Terminal Block; Module Power Connection = Circuit
Breaker –
This feature is used for the single point power options in Digit 25. Factory provided
panelboard serves as a power distribution panelboard for chiller array.
Digit 27 — Service Options
0 = None
A = LED Lighted Control Cabinet -
LED lights provide bright lighting inside enclosure offer with
long service life and can provide improve safety and visibility when service inside the enclosure is
needed.
Digit 28 — Panel Ampere Rating
Panelboard rating for single point power. Panel is factory sized and provide when single point
power option is selected.
0 = None
D = 250 Amp
E = 400 Amp
F = 600 Amp
G = 800 Amp
H = 1200 Amp
Digit 29 — Control Style
0 = Master Secondary Controller w/ Single Controller per Array - This option allows up to six
(6) FWCD modular chillers to be controlled and operated. The Master-Secondary Array Controller
requires only a single controller for the array. This option is beneficial in replacement applications
where a single larger chiller, with one controller, is replaced by modular
chillers controlled with one controller.
A = Supervisory Array Controller w/ Controller per Module - This option allows up to ten (10)
FWCD modular chillers to be controlled and operated. The Supervisory Array Controller requires
each module have an individual unit controller. This option is beneficial in applications requiring
seven (7) or more modules to be controlled and in applications where chiller uptime is critical. If
communication between the individual FWCD modular chiller unit controller(s) and the
Supervisory Array Controller is lost, or the Supervisory Array Controller fails, the individual
FWCD modular chillers can be shifted into manual mode to operate independent from the
Supervisory Array Controller and will maintain a “manual mode” default chilled leaving water
temperature set point.
B = Non-Array, Single Unit Controller – Standalone Controller has control board with twelve 0-
5vdc sensor inputs, four 5vdc digital inputs, ten 230vac 6.3amp relay outputs, four 0-10vdc analog
outputs, keypad, 128 x 64 dot pixel STN monochrome graphics LCD with 2.8" diagonal viewing
area, real time clock, MCS-I/O, RS-232, RS-485 and Ethernet communication ports.