Bryant SYSTXBBNIM01 User Manual download pdf (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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Bryant SYSTXBBNIM01 User Manual Page 2

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