Unit Controls: Operation And Wiring; Series Controls (12 Vdc) - Nu-Air NU0103 Operating, Maintaining & Installing

Light commercial heat recovery ventilator
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6 Unit Controls: Operation and Wiring

Your unit is equipped with 12 VDC and 24 VAC removable terminal blocks. The control logic of the unit
circuit board is such that the most recently used remote control will control the unit. If desired, 12 VDC
and 24 VAC controls may be used in the same installation. Use a 3 mm flat-head screwdriver to connect
wires to the terminal blocks.
6.1
ES Series Controls (12 VDC)
All ES type controls (sold separately) connect
to the 12V (4-wire) removable terminal block.
ES Series Mx and Tx controls are equipped
with a touch pad and 3 LED's. The touch pad is used to select
mode of operation or turn the appliance off. The LED's indicate
the operating mode of the HRV/ERV.
ES controls can be used in any combination and in virtually
any number, and can be wired in series or in parallel. The user
may toggle through and select any function, even if this interrupts
a current mode or cycle.
ES-T1 – 20/40/60 Minute Timer
This timer is used to make the unit operate in high speed for 20, 40 or 60 minutes and is typically
installed in bathrooms, kitchens and workspaces. You may toggle between functions or even
cancel a high speed run by tapping the touch pad.
ES-M1 Control
This basic control allows you to select from standby mode, low speed, or high speed. The ES-M1
is ideal for installations where basic ventilation functions are required.
Functions:
No LED: HRV/ERV is OFF
Standby: Unit is in standby, ready for a control signal.
Lo: Unit operates in low speed continuously with high speed override from timers or sensors.
Hi: Unit operates in high speed continuously.
ES-M2 Control
While featuring the convenience of standby and low speed modes, the ES-M2 offers automatic
ventilation with 20 minutes low speed ventilation followed by 40 minutes in standby. Use the
20/40 cycle during times of low occupancy.
Functions:
Rev 2.3 July 17, 2017
Selecting operation with ES Controls
is easy: Just tap the touch-pad!
11

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