Quantech
151
Section 7: Unit controls
Form QTC3-NM1
Issue date: 12/19/2023
7
M O N S T A R T = 0 0 : 0 0 A M
S T O P = 0 0 : 0 0 A M
The line under the 0 is the cursor. If the value is in-
(DOWN) arrow keys until correct. Pressing the EN-
TER/ADV key will enter the times and then move the
cursor to the minute box. The operation is then repeat-
ed if necessary. This process may be followed until the
hour, minutes, and meridian (AM or PM) of both the
START and STOP points are set. After changing the
meridian of the stop time, pressing the ENTER/ADV
key will advance the schedule to the next day.
Whenever the daily schedule is changed
for Monday, all the other days will change
to the new Monday schedule. This means
if the Monday times are not applicable
for the whole week, then the exceptional
days would need to be reprogrammed to
the preferred schedule.
To page to a specific day, press the SCHEDULE/AD-
VANCE DAY key until the required day appears. The
start and stop time of each day may be programmed
ENTER/ADV keys.
After SUN (Sunday) schedule appears on the display
a subsequent press of the SCHEDULE/ADVANCE
DAY key will display the Holiday schedule. This is a
two part display. The first reads:
H O L S T A R T = 0 0 : 0 0 A M
S T O P = 0 0 : 0 0 A M
The times may be set using the same procedure as de-
scribed above for the days of the week. After chang-
ing the meridian of the stop time, pressing the ENTER/
ADV key will advance the schedule to the following
display:
S __ M T W T F S
H O L I D A Y N O T E D B Y *
The line below the empty space next to the S is the
cursor and will move to the next empty space when
the ENTER/ADV key is pressed. To set the Holiday,
the cursor is moved to the space following the day of
pressed. An * will appear in the space signifying that
day as a holiday. The * can be removed by pressing the
The Holiday schedule must be programmed weekly –
once the Holiday schedule runs, it will revert to the
normal daily schedule.
Table 17: Cooling Setpoint, Programmable Limits, and Defaults
Setpoint key Mode Low limit High limit Default
Leaving chilled liquid setpoint
WATER COOLING
40.0°F
4.4°C
**70.0°F
21.1°C
44.0°F
6.7°C
GLYCOL COOLING*
10.0°F
-12.2°C
**70.0°F
21.1°C
44.0°F
6.7°C
LOW TEMPERATURE
GLYCOL COOLING
8.5°F
-13.1°C
70.0°F
21.1°C
44.0°F
6.7°C
Leaving chilled liquid control range —
1.5°F
0.8°C
2.5°F
1.4°C
2.0°F
1.1°C
Returned chilled liquid setpoint
WATER COOLING
40.0°F
4.4°C
70.0°F
21.1°C
44.0°F
6.7°C
GLYCOL COOLING*
10.0°F
-12.2°C
70.0°F
21.1°C
44.0°F
6.7°C
Return chilled liquid control range —
4.0°F
2.2°C
20.0°F
11.1°C
10.0°F
5.6°C
Max EMS-PWM remote temperature reset —
2°F
1.0°C
40°F
22.0°C
20°F
11.0°C
* Refer to the Engineering Guide. Form 150.72-EG6, for operation below 30°F (-1.1°C). Alternate thermal expansion valves must be used
below 30°F (-1.1°C).
* When using glycol, Leaving Chilled Liquid Setpoint must not be set below 10°F (-23.3°C).
** If the setpoint exceeds 55°F (12.8°C), contact the nearest Quantech Oce for application guidelines.
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