Installation – tekmar 264 Boiler Control User Manual
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© 2008 D 264 - 12/08
External Input Signal Conversion Tables
CONVERSION TABLE 0 - 10
0 - 20 mA*
0
2
0 - 10 V (dc)
0
1
Boiler Target
– – – (OFF)
50°F (10°C)
4
2
68°F (20°C)
6
3
86°F (30°C)
8
4
103°F (39°C)
10
5
121°F (49°C)
12
6
139°F (59°C)
14
7
157°F (69°C)
16
8
174°F (79°C)
18
9
192°F (89°C)
20
10
210°F (99°C)
*Requires 500 Ω Resistor in Parallel
CONVERSION TABLE 2 - 10
4 - 20 mA*
0
2 - 10 V (dc)
0
Boiler Target
– – – (OFF)
4
2
50°F (10°C)
6
3
70°F (21°C)
8
4
90°F (32°C)
10
5
110°F (43°C)
12
6
130°F (54°C)
14
7
150°F (66°C)
16
8
170°F (77°C)
18
9
190°F (88°C)
20
10
210°F (99°C)
*Requires 500 Ω Resistor in Parallel
Example
Range
=
0 - 10 V (dc)
Input
=
7 V (dc)
157°F (69°C)
Offset
=
+5°F
(3°C) +
5°F (3°C)
Boiler Target =
162°F (72°C)
Installation
CAUTION
Improper installation and operation of this control could result in damage to the equipment and possibly even personal injury. It is your
responsibility to ensure that this control is safely installed according to all applicable codes and standards. This electronic control is
not intended for uses as a primary limit control. Other controls that are intended and certified as safety limits must be placed into the
control circuit. Do not open the control. Refer to qualified personnel for servicing. Opening voids warranty and could result in damage
to the equipment and possibly even personal injury.
STEP ONE
——————
GETTING READY
Check the contents of this package. If any of the contents listed are missing or damaged, please contact your wholesaler or tekmar
sales representative for assistance.
Type 264 includes: One Boiler Control 264, One Outdoor Sensor 070, Two Universal Sensors 071, Data Brochures D 264, D 070,
D 001, Application Brochure A 264
Note: Carefully read the details of the Sequence of Operation to ensure that you have chosen the proper control for
your application.
STEP TWO
——————
MOUNTING THE BASE
Remove the control from its base by pressing down on the release clip in the wiring chamber and sliding the control away from it.
The base is then mounted in accordance with the instructions in the Data Brochure D 001.