Nu-Air WINDSOR SERIES - Electrical Schematics and Wiring - Part 3; Unit Control Board: Status LEDs; ES Series Control Wiring

Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual
Rev. 2.3 Aug. 19, 2014 - 23 -
G
A
B
12
UNIT 12 VDC REMOVABLE
TERMINAL BLOCK
+12
B
A
G
ES SERIES
CONTROL
10.13. Unit Control Board: Status LEDs & Remote Control Connections
The unit control board is divided into two “sections” comprising a 12V RS485 control standard and a
24V standard. With this feature, the user may use ES Series 12V controls and/or Windsor Series 24V
controls or 2-wire, 24V switch.
From mid-April, 2013 onward, all control boards are equipped with status lights to indicate mode of
operation.
*Where available.
10.14. ES Series Control Wiring
Using a 3 mm flat head screwdriver, connect 4-
conductor wire to the 12V (4-wire) removable terminal
block for: ES-T1, ES-M1, ES-M2, ES-M3, ES-
M4, ES-M5, ES-DVC
DO NOT cross the (+12V/12) and ground
(GND/G) wires.
For ES controls, doing so with power connected to the
H/ERV will short-circuit and destroy the ES wall control
processor.
Notes:
1. ES controls can be connected in SERIES or PARALLEL.
2. ES Controls can be used in installations where any of the 24V control options discussed in this
document are employed.
3. If you are using ONLY an ES-T1 to control your unit, you must connect a jumper wire between
R and SB on the 24V (10-wire) removable terminal block. In this situation you can add
continuous low speed operation by connecting a jumper wire between R and LO. Consult local
building code in case a centrally located control with an on/off switch is required.
CONDITION
LED AND STATUS
NO LED
UNIT/TRANSFORMER IS NOT POWERED
UNIT OFF
Red is off, Green is blinking slow, every 1 s. Also indicates processor is
programmed and running.
STANDBY
Green is OFF. Red led is blinking slow, every 1 s.
EXHCHANGE LOW SPEED
Green ON. Red blinking slow, every 1 s.
EXCHANGE HIGH SPEED
Green ON. Red blinking fast.
DEFROST
Green ON, Red ON.
RECIRCULATION LOW SPEED*
Red led ON, Yellow blinking slow, every 1s.
RECIRCULATION HIGH SPEED*
Red led ON, Green led blinking fast.