Bryant SYSTXBBNIM01 - Manual (Page 2)

The following color-code is recommended for each ABCD bus
connection:
A — Green = Data A
B — Yellow = Data B
C — White = 24VAC (Common)
D — Red = 24VAC (Hot)
It is not mandatory that the above color code be used, but each
ABCD connector in the system MUST be wired consistently.
NOTE: Improper wiring of the ABCD connector will cause the
Evolution System to operate improperly. Check to make sure all
wiring is correct before proceeding with installation or turning on
power.
III. INSTALL COMPONENTS
INSTALL NETWORK INTERFACE MODULE — Plan wire
routing before mounting. The Evolution Network Interface Mod-
ule is designed so that wires can enter it from the sides.
1. Remove top cover and mount NIM to wall using screws and
wall anchors provided.
IV. VENTILATOR (HRV/ERV) WIRING
HRV / ERV INSTALLATION — The NIM can control a Bryant
Heat Recovery Ventilator / Energy Recovery Ventilator (HRV /
ERV). Connect four wires from ventilator control board (see
ventilator installation instructions for details) to connector labeled
(YRGB). This label identifies the color of the wire to match the
ventilator wire colors (Y=yellow, R=red, G=green, B=blue or
black). See Fig. 2 for ventilator (HRV / ERV) connection.
NOTE: If system is zoned (contains an Evolution Damper Con-
trol Module), the ventilator may be connected either directly to the
Damper Control module or to the NIM. In either case, the
Evolution Zone Control will properly discover the ventilator.
V. DUAL FUEL WITH 1-SPEED HEAT PUMP WIRING
DUAL FUEL INSTALLATION WITH 1-SPEED HEAT
PUMP — The NIM is needed when a variable-speed furnace is
applied with a Bryant single-speed (non-communicating) heat
pump. See Fig. 3 for wiring details. An outdoor air temperature
sensor MUST be connected to furnace control board for proper
operation (see Fig. 5 for details).
VI. VARIABLE-SPEED INDOOR UNIT WITH 2-SPEED
OUTDOOR UNIT WIRING
2-SPEED NON-COMMUNICATING OUTDOOR UNIT —
The NIM can control a 2-speed non-communicating air condi-
tioner or heat pump (R-22 Series-A unit) with a variable-speed
indoor unit. See Fig. 4 for wiring details.
SYSTEM START-UP
Follow the system start-up process outlined in the Evolution Zone
Control or Evolution Control installation instructions.
LED INDICATORS
Under normal operation, the Yellow and Green LEDs will be on
continuously (solid). If the NIM does not successfully communi-
cate with the Evolution Control, the Green LED will not be on. If
there are faults present, the Yellow LED indicator will blink a
two-digit status code. The first digit will blink at a fast rate, the
second at a slow rate.
STATUS CODE DESCRIPTION
16 = Communication Failure
45 = Board Failure
46 = Low Input Voltage
FUSE
A 3-amp automotive type fuse is used to protect the NIM from
overloading the outdoor unit R output. If this fuse fails, there is
likely a short in the wiring to the device being controlled by the
NIM. After short in wiring is fixed, fuse should be replaced with
an identical 3 amp automotive fuse.
24 VAC POWER SOURCE
The NIM receives its 24 VAC power from the indoor unit C and
D terminals (via ABCD connector bus). In most applications, there
is sufficient power (VA capacity) available from the indoor unit
transformer to accommodate a ventilator and / or outdoor unit
connection. No additional transformer is required.
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