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STEP 3. SET THE SWITCHES.
1. The minimum ambient setpoint temper-ature (TMIN) must
be set on the circuit board. Check the design information or,
if there is no design specification, use the table on the right
as your guide.
The setpoint value must be the same as the temperature
used in the heat-tracing design and should not be varied
without redesigning the heat-tracing system.
2. Set temperature switch (TMIN—see Figure 3) as indicated in
the following table.
Min. Ambient
Setting
Temperature
20°F (–7°C)
0
10°F (–12°C)
1
0°F (–18°C)
2
–10°F (–23°C)
3
–20°F (–29°C)
4
–30°F (–34°C)
5
–40°F (–40°C)
6
–50°F (–45°C)
7
–60°F (–51°C)
8
–70°F (–57°C)
9
Note: The heating cable is not 100 per-cent energized until
the minimum setpoint temperature is reached. If you are un-
sure about this temperature setting, set it to a higher rather
than lower temperature to prevent freeze-ups.
Note: The "NET ADD" switch is not used and has no effect on
the controller operation.
3. Set the red DIP switches in the upper left corner of the control
panel as indicated in the table on the right.
DIP switch settings:
Switch Setting
Description
1
40
40°F (4°C) setpoint temperature
(default setting)
50
50°F (10°C) setpoint temperature
2
1RTD
Ambient RTD only (default setting)
2RTD
Not used
Typical design minimum ambient temperatures for
selected locations:
North America
Birmingham, Alabama
10°F (–12°C)
Barrow, Alaska
–60°F (–51°C) Berlin, Germany
Denver, Colorado
–20°F (–29°C) Bern, Switzerland
Chicago, Illinois
–10°F (–23°C) Brussels, Belgium
Bangor, Maine
–20°F (–29°C) Frankfurt, Germany –20°C (–5°F)
Reno, Nevada
–10°F (–23°C) Helsinki, Finland
Albany, New York
–20°F (–29°C) London, England
Minot, North Dakota
–40°F (–40°C) Moscow, Russia
Amarillo, Texas
–10°F (–23°C) Munich, Germany
Spokane, Washington
–20°F (–29°C) Oslo, Norway
Huntington, West Virginia –20°F (–29°C) Paris, France
Cheyenne, Wyoming
–30°F (–34°C) Prague, Czech Rep. –30°C (–22°F)
Figure 3
NET ADD
ON
1
2
Europe
Amsterdam, Holland –18°C (0°F)
–25°C (–13°F)
–25°C (–13°F)
–15°C (5°F)
–30°C (–22°F)
–10°C (14°F)
–40°C (–40°F)
–25°C (–13°F)
–25°C (–13°F)
–15°C (5°F)
Vienna, Austria
–20°C (–5°F)
TMIN
2
3
2
3
1
4
1
4
0
0
5
5
9
9
6
6
8
7
8
7
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