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Interlocking the ERV to an Air Handler or Furnace Blower
Connecting the ERV as illustrated will ensure the
air handler/furnace blower motor is operating
whenever the ERV is venting.
The ERV must be interlocked to the furnace/air
handler with a simplified installation (return/
return installation).
Setting "Standby" When Using a Main Control
The ERV will be "fully-off" when the off position is selected
on the Main Control. Timers and/or other controls will not function when the ERV is in the off
position.The "fully-off" feature can be modified to "standby-off" by adding a jumper on the terminal
block
between 2 (ON) and 3 (RED). "Standby" can also be achieved by setting the main control
to the ON position and selecting speed 0*. Timers and/or additional controls will initiate high speed
ventilation when activated.
*Speed 0 is not available on all controls.
Operating the ERV Without a Main Control and Adding Dry Contact Controls
A jumper must be in place between 2 (ON) and 3 (RED) on the terminal block to activate the ERV for
timers and/or dry contact controls.
Adding Dry Contact Controls
Low Speed: A jumper between 2 (ON) and 1 (LOW) initiates low speed ventilation.
High Speed: A jumper between 2 (ON) and 6 (HI) initiates high speed ventilation.
Dehumidistat: A dry contact for a dehumidistat is connected between 2 (ON) and 10 (BLK)
The ERV must have a jumper in place between 2 (ON) and 3 (RED) on the terminal block when
installing the unit without a main control.
Installer Selectable High Speed Settings
The circuit board on this unit has adjustable DIP switches for the selection of HIGH speed Hi1, Hi2
or Hi3. The factory setting is Hi3, which is the highest speed possible H2 will result in a lower
airflow than H3, with H2 the lower of the high speeds. Refer to the specification page found online
at; www.lifebreath.com for the airflow rates on Hi1, Hi2 and Hi3.
Note: Low speed is not adjustable.
Description
Hi 3 (factory default)
Hi 2
Hi 1
Attention/Caution
Timers mount in standard electrical boxes.
Use 3 wire 20 gauge (min.) 100 ft length (max.) low voltage wire and multiple timers individually wired back to the unit.
Caution:
Consideration should be given to competing airflows when connecting the ERV in conjunction with an air handler/
furnace blower system.
Building codes in some areas require "fully-off" functionality. Check with your local building authority before
modifying the unit to "standby-off". Unintentional operation of the ERV by the end user may occur if the unit is
modified from "fully-off" to "standby-off".
Switch 1
Factory Setting "ON"
Factory Setting "ON"
Factory Setting "ON"
ERV Terminal Block
Wire
Connector
Furnace
Terminal Strip
Switch 2
Leave on factory setting
Leave on factory setting
Leave on factory setting
Furnace
Thermostat
Switch 3 Switch 4
ON
ON
OFF
ON
ON
OFF
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