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note: The ALERT LED will flash consecutively, pause
and then repeat the process. The number of consecutive
flashes, referred to as the Flash Code, correlates to a
particular abnormal condition. Detailed descriptions of
these ALERT Flash Codes are listed in Tables 3 & 4.
• TRIP LED (Red):indicates a demand signal is received
from the thermostat, but current to the compressor is
not detected by the module. The TRIP LED typically
indicates if the compressor protector is open or the
compressor has no power.
The scroll compressor's r (run), c (common), and S
(start) wires are routed through the holes in the Comfort
TM
Alert
module marked r, c, & S. note: The common
wire does not need to be routed through the module for
it to operate.
grounding
Warning:
the unit cabinet must have an uninterrupted or
unbroken electrical ground to minimize personal
injury if an electrical fault should occur. do not
use gas piping as an electrical ground
This unit must be electrically grounded in accordance
with local codes or, in the absence of local codes, with
the National Electrical Code (ANSI/NFPA 70) or the CSA
C22.1 Electrical Code. Use the grounding lug provided in
the control box for grounding the unit.
thermostat connections
• Thermostat connections should be made in accordance
with the instructions supplied with the thermostat and
the indoor equipment. Typical AC and thermostat
hookups are shown in Figures 3 & 4.
• The outdoor unit is designed to operate from a 24 VAC
Class II control circuit. The control circuit wiring must
comply with the current provisions of the NEC (ANSI/
NFPA 70) and with applicable local codes having
jurisdiction.
• The low voltage wires must be properly connected to
the units low voltage terminal block. Recommended
wire gauge and wire lengths for typical thermostat
connections are listed in Table 2.
• The thermostat should be mounted about 5 feet
above the floor on an inside wall. DO NOT install the
thermostat on an outside wall or any other location
where its operation may be adversely affected by radiant
heat from fireplaces, sunlight, or lighting fixtures, and
convective heat from warm air registers or electrical
appliances. Refer to the thermostat manufacturer's
instruction sheet for detailed mounting and installation
information.
6
Y/Y2
Furnace
figure 3. typical 2-Stage air conditioner
(with comfort alert) with gas furnace
!
Y/Y2
Furnace
figure 4. typical 2-Stage air conditioner
(without comfort alert) with gas furnace
thermostat
Wire gauge
24
22
20
18
table 2. thermostat Wire gauge
Thermostat
O Y2 Y G RC RH C W2 W/E
R
C
Y1
G
W2
Air Conditioner
W1
(Comfort Alert)
NOTE: FOR THE MATCH
*S4BF-024KA + C6B(A,H)-X30(C,U)-C + *G7T-C
*S4BF-024KA + C6B(A,H)-X30(C,U)-C + *G7S-C+*SHE
Only connect Y2 from thermostat to OD Y2
Thermostat
O Y2 Y G RC RH C W2 W/E
R
C
Y1
G
Air Conditioner
OD Section
W2
(No Comfort Alert)
W1
NOTE: FOR THE MATCH
*S4BF-024KA + C6B(A,H)-X30(C,U)-C + *G7T-C
*S4BF-024KA + C6B(A,H)-X30(C,U)-C + *G7S-C+*SHE
Only connect Y2 from thermostat to OD Y2
recommended t-Stat Wire
unit to t-Stat (length in ft)
2-Wire
(heating)
55
90
140
225
O
R
C
Y/Y2
Y1
G
OD Section
C
Y/Y2
Y1
5-Wire
(heating/cooling)
25
45
70
110
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