KMC Controls FlexStat Application Guide

BAC-1xxx53 Series (5 Relays, 1 Triac, and 3 Analog Outputs) Section 58 Application Guide L
The BAC-120053CW FlexStat is a 5-relay, 1-triac,
and 3-analog-output controller with special rm-
ware that is used to control the Copeland Scroll
®
Digital
™
compressor. (See www.EmersonClimate.
com.) The BAC-120053CW is similar to the Emer-
son 543-0175-00 Commercial Comfort Controller
(which is manufactured exclusively for the Cope-
land Scroll Digital compressor by KMC Controls as
a customized version of KMC’s standard FlexStat).
The BAC-120053CW has a KMC logo (instead of
Emerson), plus economizer and (with a remote
CO
2
sensor) Demand Control Ventilation (DCV)
functionality.
The triac replaces Relay 6 and is used to modu-
late the compressor. HPU and RTU applications (only) are supported.
Other specications are the same as for the BAC-120063C model (see
also the BAC-12xxxx/13xxxx/14xxxx Series FlexStat Data Sheet).
In single compressor applications, the FlexStat varies the capacity of
the Scroll Digital compressor over 10–100% of the rated capacity. Below
10% cooling demand, the FlexStat controls at 10% to meet low levels
of demand. In multiple compressor (tandem) applications, the FlexStat
manages the variable capacity Scroll Digital compressor as the 1st stage
of cooling, eectively providing 5–100% variable capacity control over
the full range of cooling demand in a multiple compressor (tandem) ap-
plication.
BAC-1xxx53 Series
(5 Relays, 1 Triac, & 3 Analog Outputs)
IN9
(DTS) IN8
GND
(Remote Temp.) IN7
+B
–A
IN4
IN3
GND
(FST/DAT) IN2
Common/–/C
Phase/ /R
Analog 9
GND 7–9
Analog 8
Analog 7
Triac 6 (T | T)
SC 4–6 (R | R/RH)
Relay 5 (W | W1)
Relay 4 (Y2 | Y2)
Relay 3 (Y1 | Y1)
SC 1–3 (R | R/RC)
Relay 2 (O/B | W2)
Relay 1 (G | G)
Outputs (HPU | RTU)
(Wiring Cutout in Backplate)
(Optional)
MS/TP Network
Inputs
24 VAC
(Wiring is dependent
on application)
Inputs
(Optional)
IP/Ethernet
Network
NOTE: IN1 and IN5–6 are
reserved for internal sensors
NOTE: SC = Switched
(relay) Common
For a general bill of material items and general HPU and RTU sequence
of operations, see BAC-1xx63/1xxx63 Series (6 Relays and 3 Analog Out-
puts) on page 27.
Note: Expected availability of this model is the third quarter of 2012.
When available, see the BAC-1xx53 Installation Guide section
for detailed drawings and input/output connections as well as
other important installation information.

KMC Controls FlexStat Specifications

General

Brand	KMC Controls
Model	FlexStat
Category	Thermostat
Language	English