Appendix E: Terminal Control Diagrams - Broan HRV650 Installation, Operation And Maintenance Instructions

E-1: Terminal Label
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 out-
let on the 700 cfm 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 Setback) Timer/Sensor
24 VAC, needs dry contact.
LOW - COM - HIGH
Remote fan switching requires a single pole, double
throw switch (SPDT).
Fan Interlock switch (FF)
Dry contact closes on ventilation or frost control. Used
to control external fan source (G).
WALL CONTROL
Black
Red
OCCUPIED
TIMER/
SENSOR
F
F
CLASS 2 VOLTAGE
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.
Appendix E
Terminal Control Diagrams
Green
Yellow
LOW
COMMON
HIGH
E-2: Wall Control Connection
Three types of remote wall controls are available:
1. Standard Wall Control with fan switch and dehu-
midistat control.
2. Xtra Wall Control with fan mode selection, dehu-
midistat control and maintenance indicator.
3. AquaAir Wall Control with fan mode selection,
dehumidistat control and high speed recirculation
mode.
The remote wall controls work with the integrated elec-
tronic controls within the unit to control ventilation
sequences. Each wall control has different features and
requires 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: An occupied timer or sensor device cannot be
used with the Xtra wall control.
WALL CONTROL
Black
Red
OCCUPIED
TIMER/
SENSOR
F
F
CLASS 2 VOLTAGE
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.
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Wall
Green
Control
Yellow
LOW
COMMON
HIGH