Erv (Energy Recovery Ventilation) Control - Mitsubishi Electric PEAD Series Service Manual

ERV (ENERGY RECOVERY VENTILATION) CONTROL

11. ERV (ENERGY RECOVERY VENTILATION) CONTROL
11-1. Control Specifications
The below table show how the field installed ERV is controlled.
ERV output
Function
Mode26
CNER input
─
OFF
*1
"1"
ON
"2"
*1 Factory setting.
*2 When fan speed setting by RC is "Auto", Fan speed is fixed to "HIGH".
*3 If ERV control is effective when STOP, IDU doesn't report fan status or PB error (Fan motor error).
RC: Remote controller
11-2. Installation
A basic connection method is shown below.
XF
ERV
On-site preparation
Maximum cable length is 10m (32ft)
HWE2109A
Condition Fan speed
Cool/Heat/Fan operation RC setting
Defrost
STOP
Cool/Heat/Fan operation RC setting
Defrost
STOP
Cool/Heat/Fan operation RC setting
Defrost
RC setting*
STOP
XB
XB
ERV switch
35
CN2C output
(=Fan output)
ON
STOP OFF
STOP OFF
ON
STOP OFF
STOP OFF
ON
STOP OFF
2, *3 ON
Indoor unit
control board
CN2C
CNER
Use XB relay having following specifications
Rated voltage:12VDC
Power consumption:1W or less
ERV switch: Minimum applicable load 1m Aat DC
Contact rating voltage: 15VDC or more
Contact rating current: 0.1A or more