Typical Power Backup Wiring; Figure No. 5 Typical Power Backup Wiring - Varifan IC-664 Installation Manual

6.2.2 Typical Power Backup Wiring

A backup relay (DPDT) connects to the power source 1 in normal operation but will switch to the
power source 2 if source 1 is disabled. The backup relay must be selected to ensure it is able to
support the required power load.

FIGURE NO. 5 Typical Power Backup Wiring

IC-664 INSTALLATION GUIDE
L2/N
L1
7
8
1
2
GND
L2 L1
DISTRIBUTION
PANEL
LINE
115/230 VAC
source 2
7
COM 2
8
COM 1
1
2
8 PIN RELAY DPDT
(OMRON model MK2EP-UA-AC120)
www.monitrol.com
GND
6
5
4
3
L2 L1 GND
DISTRIBUTION
PANEL
N LINE
115/230 VAC
source 1
6
NO 2
5
NC 2
4 NC 1
3 NO 1
9