Installation

19
Appendix E
TERMINAL CONTROL DIAGRAMS
A low voltage remote control wiring interface is provided on the
unit. The connections for the low voltage remote wiring are located
on two terminals adjacent to the exhaust fan outlet (or adjacent to
the supply fan outlet on the B1600705 unit). All field installed wiring
must be low voltage class II.
REMOTE WALL CONTROL
Optional wall control requires a 4 wire LVT-24 gauge (or
equivalent). This remote wall control runs on 12 VDC.
LOW VOLTAGE CONTROLS
All other terminals are dry contacts.
Low Voltage terminal control consists of the following:
WALL CONTROL
4 wire LVT 24 gauge minimum
OCCUPIED (NIGHT SET BACK) TIMER/SENSOR
24 VAC, needs dry contact
LOW - COM - HIGH
Remote fan switching requires a single pole, double throw switch
(SPDT)
FAN INTERLOCK RELAY OUTPUT (FF)
Dry contact closes on ventilation or defrost. Used to control
external fan.
Two types of remote wall controls are available:
1. Slide Switch Wall Control with fan switch and dehumidistat
control (for B6LC and 1B2LC units)
2. VT10W Wall Control with fan mode selection, dehumidistat
control and high speed recirculation mode (for B1600705 unit).
The remote wall controls work with the microprocessor electronic
control within the unit to control ventilation sequences. Each wall
control has different features and require 4-wire connection to the
unit as shown below.
Without the wall control, fans can be operated with a remote fan
switch as shown in Appendix E-4.
NOTE:
When using a wall control, never use the the LOW, COMMON and
HIGH terminals.
E-1: TERMINAL LABEL
WALL CONTROL
CLASS 2 VOLTAGE
Black
OCCUPIED
TIMER/
SENSOR
F
F
LOW
COMMON
HIGH
Red
Green
Yellow
NOTE:
Connections are all dry
contacts except wall control
and 24VAC power supply.
Use of 24VAC circuit
requires isolating contacts
(ex. thermostat) to prevent
interconnection of Class 2
outputs.
VE0002A
E-2: WALL CONTROL CONNECTION
Wall
Control
JUMPER
WALL CONTROL
CLASS 2 VOLTAGE
Black
OCCUPIED
TIMER/
SENSOR
F
F
LOW
COMMON
HIGH
Red
Green
Yellow
NOTE:
Connections are all dry
contacts except wall
control
and 24VAC power supply.
Use of 24VAC circuit
requires isolating contacts
(ex. thermostat) to prevent
interconnection of Class 2
outputs.
VE0006A