Page 7
LC and LG Units
1 - Install power board and hinged panel in control box
as outlined in steps 4 through 7 in KC, KG and KH
wiring section. See figure 5.
Note - If a DDC control is factory-installed, the hinged
panel will already be in place. Discard panel provided in kit.
2 - Secure P255, J250 and J252 harness ends to the
insertion-type wire tie located in the control box. See
figure 9.
3 - Make jack/plug connections as shown in figure 10
when installing return air smoke detector only, figure
11 when installing supply air smoke detector only, and
figure 12 when installing both supply and return air
smoke detectors.
NOTE -
Harness P252/P253 is factory-installed and
is located near the supply sensor and power board
hinged panel. Plugs are located in the unit near the
the sensor(s) and power board.
Test Magnet(s)
A test magnet is provided in a bag assembly with each
sensor. Remove the magnet from the bag assembly and
place it on a metal surface near the sensor. The magnet is
used during test procedures.
Maintenance and Test Procedure
Instructions
The sensor manufacturer's instructions, which are
provided with each sensor, outline information on
maintenance and test procedures. Place these
instructions in the literature pouch for future reference.
P250
LC or LG Unit Application with Single Return Air Smoke Detector
(Note: Verify that power board DIP switch is set to 1)
53W80
FIGURE 10
A171
RETURN AIR
SENSOR
J251
P251
J255
P255
J250
J252
A173
SMOKE
DETECTOR
POWER
BOARD
A55
UNIT
CONTROLLER
P262
J262C
1
4
GND
J255
Wires marked
J255-1, 2, 3, or 4
Quick-Connect
Terminals
P252
P253
Wires marked
P253-1, 2, 3, or 4
Wires marked
P252-1, 2, 3, or 4
P250
J261
Wires marked
J261-1, 2, 3, or 4
Wires marked
P250-1, 2, 3, or 4
Discard These Three Harnesses - Not Used In This Application
4 PIN
6 PIN
6 PIN
4 PIN
6 PIN
4 Wires
4 Wires
4 Wires
4 Wires
6 PIN
4 PIN
4 PIN
4 PIN
4 PIN
Wires marked
J262C-1, 2, 2, or 3
4 PIN
4 PIN
Wires marked
J255-1, 2, 3, or 6
Wires marked
P251-1, 2, 3, or 4
Wires marked
P250-1, 2, 3, or 4
Kit harness connections
shown in bold.
