M-Series Technical Manual
41
Cambridge Engineering, Inc.
2. Press and bold the
HEAT OFF
button while pressing
the
UP
or the
DOWN
button until the desired tempera-
ture for the heater to turn OFF is displayed.
SETBACK MODE (OFF Time Schedule)
The SETBACK mode requires setting only the ON tem-
perature. The OFF temperature will be automatically
set based on the temperature difference between HEAT
ON and HEAT OFF programmed above for the HEAT
mode.
1. Press and hold the
SETBACK TEMP.
button while
pressing the
UP
or the
DOWN
button until the desired
temperature for the heater to turn ON is displayed.
SETBACK OVERRIDE
In instances where temporary heat is desired when the
scheduler is in the SETBACK mode, the OVERRIDE
timer can be used. Setting this timer, located on the front
of the TSS panel, will override the SETBACK tempera-
ture setting and increase the space temperature to the
HEAT ON and HEAT OFF temperature settings for the
amount of time set on the OVERRIDE timer.
SETTING SCHEDULES
The TSS Controller has separate programmable daily
schedules for the HEATING and the SUMMER
VENTILATION modes. The schedule currently in
effect is determined by the position of the keyswitch
in the door of the enclosure. With the keyswitch in
the HEATING or OFF position, the schedule for the
Heating Mode is accessible. With the keyswitch in the
SUMMER VENTILATION position, the schedule for
the Ventilation Mode is accessible. (This will be indi-
cated by the VENT MODE light on the TSS Controller
being illuminated). Before attempting to program the
schedule, determine the planned time periods for HEAT
(ON) and SETBACK (OFF) for the HEATING mode
and the planned ON and OFF time periods for the
Ventilation mode. The time that it takes to recover from
the SETBACK temperature to the HEAT temperature
must also be taken into consideration for the ON time
in the HEATING mode. The following charts can be
filled in for a reference during the programming of
the schedule. There are fifteen available ON and OFF
program cycles for both HEATING and SUMMER
VENTILATION. The first ON and OFF cycles are fixed
for Monday through Friday and should only be used
when the schedules for those days are identical. The
fourteen additional numbered cycles can be programmed
for any one day or successive days.
NOTE: Do not program the TSS controller with over-
lapping schedules, as operational errors will occur.
Whenever the heater is operating during a scheduled ON
cycle and a subsequent overlapping program is encoun-
tered, that program will be ignored.
A Holiday Setback Schedule is available for temporary
operation in the Setback Mode of up to nine different
holiday periods without affecting the current schedules.
(See HOLIDAY SETBACK SCHEDULE section for
instructions on using this feature).
All unused program cycles should not contain any set-
tings. Check all cycles after programming to assure that
the display for unused cycles shows "--:--". If undesired
settings have been entered, scroll the time display until
"--:--" is displayed (between 11.59PM and 12.00AM for
time settings; between 12.31 and 1.01 for date settings).
