Communication Wiring; Programming The Time Clock Option; Setting The Time Clock; Programming The Time Clock - Trane Technologies IntelliPak Signature SCWF Installation, Operation And Maintenance Manual

Installation - Electrical
Note: Tape the non-insulated end of the shield on shielded
wire at the unit. Any connection between the shield
and ground will cause a malfunction. If daisy-
chained in the unit, splice and tape the shields to
prevent contact with ground.

Communication Wiring

Note: Communication link wiring is a shielded, twisted pair
of wire and must comply with applicable electrical
codes.
An optional communication link provides a serial
communication interface (SCI) between Tracer Summit and
each commercial self-contained (CSC) unit in the system.
The CSC system can have a maximum of 12 CSC units per
connection link to Tracer Summit. Use a single 18 AWG
shielded, twisted pair wire with stranded, thinned copper
conductors to establish each communication link between
Tracer Summit and each unit.

Programming the Time Clock

Option

Setting the Time Clock

Use the following instructions to set the time clock:
Important: Depress the reset key before beginning to set
time and program.
1. Select military (24:00 hr.) or AM/PM (12:00 hr.) time
mode by depressing and holding the "h" key while
pressing "+ 1h" key to toggle between military and AM/
PM. (AM appears in the display when in AM/PM mode.)
2. Press and hold down "��" key.
3. If setting the time when daylight savings time is in
effect, press "+ 1h" key once (+ 1h will appear in
display).
4. Set hour with "h" key. If AM or PM does not appear in
display, the unit is in military time. See note above to
change display.
5. Set minutes with "m" key.
6. Press "Day" key repeatedly to the day of the week. (1 is
Monday, 7 is Sunday)
7. Release "��" key, colon will begin flashing.
Note: If keys h + or m + are kept depressed for longer than
2 seconds, a rapid advance of figures will result.
The "Digi 20" electronic time switch is freely programmable
for each day of the week in one minute increments. For
easy and quick programming, the following 4 block
programs are available:
• Monday through Sunday
• Monday through Saturday
• Monday through Friday
• Saturday and Sunday
48
Programming the Time Clock
Use the following instructions to program the time clock:
1. Press "Prog." key. 1234567 AM —:— will appear in
display. (Pressing "Prog." key again, display will show
the number of free programs "Fr 20"). Press again to
RETURN to 1st program.
2. Press "��"key,"◉" ON symbol will appear. Pressing the
key again will toggle to OFF "❍". Select ON or OFF for
the program.
3. Press "h+" to select hour for switching time.
4. Press "m+" to select minute for switching time.
5. If the program is to occur every day of the week, (24
hour time control) ignore "Day" key and press "Prog."
key to advance to program.
6. For 7 day time control, press "Day" key. 1 2 3 4 5 6
(Monday through Saturday) block of days appears in
display. Pressing "Day" key again, 1 2 3 4 5 (Monday
through Friday) appears in display. Repeated presses
will cycle through all days of the week and back to 1
through 7 (Monday through Sunday). Select day or
block of days desired.
7. Press "Prog." key and repeat steps 2 through 6a to
enter additional programs of ON and OFF times. (Note
that more than one OFF time may be programmed,
enabling automatic control or manual overrides.)
8. Press "��" key to enter run mode.
Reviewing and Changing Programs
Use the following instructions to review and change

programs:

1. To review a program at any time, press "Prog." key.
Programs display in the sequence they were entered
with repeated presses of "Prog." key.
2. To change a program, select that program as outlined
in step 1. Enter the time of day and days of week just as
in the programming steps above.The old program is
overwritten with the new selections. Press "Prog." to
store the new program.
3. To delete an individual program, select the program as
in step 1 and press "h" and "m" keys until "—:—"
appears in the display. Press either "Prog." or "¹" key
until"—:—" flashes.The program is deleted after a few
seconds.

Manual Override

While in the "run" mode ("��" symbol is displayed), pressing
the "��" key will reverse the load status (switch load off if it
is on, or switch it on if it is off). A hand symbol appears in
the display to indicate the override is active. At the next
scheduled switching time, automatic time control resumes,
eliminating the override.
Pressing the "��" key a second time "◉" appears in the
display indicating the load is permanently on.
Pressing the "��" key a third time "❍" appears in the display
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