5 Electrical connections (continued)
37
Installation & Service Manual
Installation of a Remote Sensor (Boiler Application)
1. Turn OFF the main electrical power and the main manual
gas shutoff to the appliance.
2. Remove the side access panel from the appliance to gain
access to the thermostat.
3. Locate the sensor in the kit. Determine the location of the
remote sensor and measure the amount of wire needed to
connect the sensor to the thermostat. See Wiring of
Remote Sensors on page 36 for guidelines.
4. Use twisted pair wire, minimum 18 gauge or larger. See
Table 5A, page 33 regarding distance versus wire gauge.
Ensure all wire insulation is trimmed to reveal at least 3/8"
of exposed wire.
5. Connect the measured wire to the sensor wire using wire
caps (see FIG. 5-5). Install .250 x .032 insulated female
quick connect terminals to the end of the wires. Feed the
wires through the access hole located on the back of the
unit and secure the connectors to the thermostat
connections (Sys/Tank) CN5 and CN6 located in the
upper right-hand of the thermostat.
6. Turn on the electrical power and the main manual gas
shutoff to the appliance.
7. Replace the side access panel.
8. Fire the appliance and resume operation.
Installation of a Tank Sensor (Water Heater
Application)
1. Turn OFF the main electrical power and the main manual
gas shutoff to the appliance.
2. Remove the side access panel from the appliance to gain
access to the wire harness.
3. Locate the two blue wires with a tag notating the remote
thermostat sensor. Feed the blue wires through the access
hole located on the back of the unit.
NOTE: It will be necessary to add additional wire to
reach from the appliance to the remote water source. Use
twisted pair wire, minimum 18 gauge or larger. See Table
5A, page 33 regarding distance versus wire gauge. Ensure
all wire insulation is trimmed to reveal at least 3/8" of
exposed wire.
4. Connect the wires to the sensor wire using wire caps.
5. Turn on the electrical power and the main manual gas
shutoff to the appliance.
6. Replace the side access panel.
7. Fire the appliance and resume operation.
Figure 5-5_Installation of Remote Sensors
Outdoor Air Reset Option
For boilers ordered with the Outdoor Air Reset option,
there is an additional control (FIG. 5-6). There are three
setting knobs for Shutdown, Outdoor Air Max., and Ratio.
There is also a switch to turn the outdoor air shutdown
feature On or Off. An O.A. Sensor is also included.
(c)2002 L.C.
O.A. MAX.
O.A. SHUTDOWN
O.A. SENSOR
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