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XW System Accessories Installation
5–10 975-0239-01-01
Mounting the Unit
The XW Automatic Generator Start is to be mounted vertically on a wall with the
connectors facing downwards.
To mount the XW Automatic Generator Start:
1. Hold the unit flush and square against the wall, panel, or horizontal surface.
• If the mounting surface requires pre-drill holes for the screws, use the supplied
mounting template to mark, then drill, four holes.
2. With a Phillips screwdriver and the supplied #6 screws, secure each corner of the XW
Automatic Generator Start to the mounting surface.
Wiring to the 20-contact Connector
ELV Circuits ELV (Extra-Low Voltage) circuits have an open-circuit voltage of not more than 30 V
rms
or 42.2 VDC or peak, and are therefore not a shock hazard.
Class 2 Circuits As per the US National Electrical Code (NEC) and the Canadian Electrical Code (CEC),
available power in Class 2 circuits is limited to 100 VA, usually by current limiting by
means of overcurrent protection or series resistance. The current is limited to 5 A for
circuits with open-circuit voltage of 20 V, and to I=100/V
oc
for circuits with open circuit
voltage between 20 V and 30 V.
Circuit Limitations The relay contacts in the XW Automatic Generator Start are rated at 5 A maximum and all
circuits on the 20-contact connector are rated at 30 V maximum.
Ensure that all circuits connected to the 20-contact connector obey the following limits:
Wiring Harness Connections to the generator, thermostats, and external ON/OFF switches are made using
a wiring harness that plugs into the 20-contact connector (see Figure 5-8).
CAUTION: Shock Hazard
All installation wiring should be performed by a qualified installer or electrician.
WARNING: Fire, Shock, and Energy Hazards
The 20-contact connector is intended for connection to Class 2 ELV (Extra Low
Voltage) circuits only. Do not exceed the circuit limitations specified in the
following section.
Table 5-1
Circuit Limitations
Circuit Parameter Circuit Maximum
Open circuit voltage (V
oc
)
30 V maximum
Overcurrent protection
(fuse size for open circuit voltage up to 20 V) 5 A maximum
Overcurrent protection
(fuse size for open circuit voltage from 20 V to 30 V)
5 A to 3.33 A
(100/V
oc
amps
maximum)