A
DJM3
IOM-17
10 of 27 Mar 99 R3
The DJM3 is designed to use either of the following as a setpoint:
The setpoint mounted on the face of the DJM3 (range of 50‐95°F (10‐35°C)). If the DJM3 face
mounted set‐point is used, terminals “SP and S” must be jumpered; or
The Johnson Controls TE 6100‐960 set‐point (range of 50‐85°F (10‐29°C)). If the TE 6100‐960 is used
as a set‐point, “S to SP” is not jumpered and the TE 6100 must be wired:
TABLE 7
TE 6100 Wires
DJM3 Terminals
Violet (not used)
‐
Red (not used)
‐
Grey
Wired to terminal U
Blue
Wired to terminal M
Orange
Wired to terminal S
DISCHARGE
TEMPERATURE
SENSOR
(D
TEMP)
The DJM3 uses the discharge sensor for both temperature control and low limit. Because of this, the
DJM3 will not operate with a faulty discharge sensor. If the discharge sensor resistance is greater than
4000‐ohms or less than 880‐ohms, the unit will lock out either on low limit or bad temperature sensor.
MODULATING
ROOM
RESET
(continuous
blower
operation
only)
DIP switch 3 must be "on". This option also requires a TE 6100 wired:
TABLE 8
TE 6100 Wires
DJM3 Terminals
Red (not used)
‐
GREY
Wired to terminal V
VIOLET
Wired to terminal X
ORANGE
Wired to terminal Y
BLUE
Wired to terminal Z
If DIP switch 3 is on and the TE 6100 is not wired to the correct DJM3 terminals, the DJM3 will reset the
discharge temperature down as it thinks that the room sensor is very warm. The room temperature
requirements can increase or decrease (reset) the calculated discharge air set‐point.
Note: If room reset calling, the “calculated” discharge temperature setpoint will vary from the setting
of “master” setpoint.
The room‐reset feature is activated by DIP switch 3.
Room sensor calibration pot is Room Cal Pot.
Room reset band is
3°F (fixed).
The “room reset band” means a room temperature error of just 3°F will result in a maximum reset of
the discharge air set point. The actual amount reset (in degrees) varies as per both the setting of Pot
Reset Ratio and the discharge set point. The calculated discharge air set point (dial s reset) is
limited between 48 and 120°F.