Mitsubishi Electric M Serie Manuel D'installation page 30

13.5. ERV (Energy Recovery Ventilation)
Part Number: CN24RELAY-KIT-CM3
ERV
Max 32 Ft.
12VDC
Coil
ERV Switch (field)
Max 32 Ft.
ERV output
Function
Mode 26
CNER input
OFF
1
ON
a.
Remote controller
b.
Factory setting
c.
If ERV control is effective when STOP, IDU doesn't report fan status or PB error (Fan motor error).
d.
When fan speed setting by RC is "Auto", Fan speed is fixed to "HIGH".
Specifications are subject to change without notice.
SVZ-KP12, 18, 24, 30, 36NA
Part Number: PAC-740
Control Board In Air Handler
Air Handler
Condition
Cool/Heat/Fan operation
- Defrost
STOP
Cool/Heat/Fan operation
b.
Defrost
STOP
Cool/Heat/Fan operation
2 Defrost
STOP
Sequence of operation:
1. The ERV demand switch closes CNER
2. 12 VDC is provided to CN2C to turn on ERV
3. If the unit goes into defrost, CN2C stops 12 VDC output
• Non-Voltage a-contact input
• Contact rating voltage >= 15 VDC
• Contact rating current >= 0.1 A
• Minimum applicable load <= 1mA at DC
Fan speed
a.
RC setting
STOP
STOP
RC setting
STOP
STOP
RC setting
STOP
RC setting
30
ERV Control
ERV Switch:
CN2C output
(=Fan output)
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
c.,d.
ON
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