AERCO Modulex General Manual - Manual (Page 32)

INSTALLATION, OPERATION & MAINTENANCE
5-2
5.
It is necessary to install a double-pole switch on the supply line in an easily accessible position in
order to quickly and safely disconnect service. Do Not affix switch to boiler sheet metal
enclosure.
Figure 5-1. Junction Box Wiring Connections
After placing the boiler in operation, the ignition system safety shutoff device must be tested. If an
external electrical source is utilized, the boiler, when installed, must be electrically bonded to ground in
accordance with the requirements of the authority having jurisdiction or, in the absence of such
requirements, with the National Electrical code (NEC), ANSI/NFPA 70 and/or the Canadian Electrical
Code (CEC) Part I, CSA C22.1, Electrical Code.
5.2 DHW STORAGE TANK
Domestic hot water (DHW) production by an external storage tank connected to the boiler can be
implemented by an electric diverting valve or a separated storage tank loading pump. See Figure 5-2.
The DHW tank temperature sensor will be connected to the terminals 3 (F3) and 4 (GND) of E8
Controller connector number I.
5.3 ENABLE/ DISABLE
Enable/Disable: it shall be connected to the terminals 3 (F3) and 4 (GND) of E8 Controller connector
number I.
5.4 INSTALLATION OF SENSORS
To avoid electromagnetic interference, it is necessary to separate any external sensor wiring (between
sensor and terminal strip) from any 120 VAC power wiring.