R7426A,B,C TEMPERATURE CONTROLLER
3
63-2564—1
Pt 1000 sensors:
C7031D1070: For hot or chilled water.
C7031F1026: For outdoor air temperature.
C7031J1068: For duct discharge air (averaging).
C7031K1025: For hot or chilled water (strap-on).
Table 1. Sensor Offset Per 33 ft (10m) of Wire.
Fig. 1. R7426 Dimensions.
Table 2. CPA/SPA Selectable Inputs.
a
Default value.
INSTALLATION
When Installing this Product...
1.
Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2.
Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3.
Installer must be a trained, experienced service
technician.
4.
After installation is complete, check out product
operation as provided in these instructions.
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Mounting
The controller can be mounted in an electric cabinet or other
suitable enclosure. They are suitable for back panel, wall, and
DIN rail mounting.
Back Panel or Wall Mounting
1.
Drill two holes in the mounting surface (see Fig. 1).
2.
Remove the controller from the baseplate:
a. Insert a flat head screwdriver into the slot at the right
side of the control face.
b. Pull the right side of the control slightly away from
the baseplate.
c. Insert a flat head screwdriver into the slot at the left
side of the control face.
d. Pull the controller away from the baseplate.
3.
Mount the baseplate to the surface.
4.
Replace the controller on the baseplate.
DIN Rail Mounting
1.
Remove the controller from the baseplate:
a. Insert a flat head screwdriver into the slot at the right
side of the control face.
b. Pull the right side of the control slightly away from
the baseplate.
c. Insert a flat head screwdriver into the slot at the left
side of the control face.
d. Pull the controller away from the baseplate.
2.
Mount the baseplate to the TS35 DIN rail.
3.
Replace the controller on the baseplate.
Wiring
Connect the wires to the device:
1.
Strip 3/8 in. to 1/2 in. of insulation from controller end of
wire.
2.
Push stripped end of each wire into appropriate terminal
(see Fig. 2 to 4).
3.
Apply power to device.
Wire Type
in AWG (mm
2
)
Temperature offset in °F (°C)
Pt 1000
NTC
20 (0.5)
0.32 (0.18)
negligible
17 (1.0)
0.16 (0.09)
15 (1.5)
0.11 (0.06)
CPATYP
Value
Potentiometer
(in ohms)
CPA/SPA range
0
a
internal
CPA: ±10°F
1
9574 to 1426
2
100K to 0
3
9574 to 1426
SPA: 55°F to 85°F
4
100K to 0
5
0 to 100K
6
0 to 100K
SPA: 32°F to 130°F
or 32°F to 260°F
+
–
SEL
SET
4-1/8
(105)
3-7/16
(87)
1-7/16
(37)
6 (152)
4-5/8 (118)
1/8 (3) DIAMETER
WALL MOUNTING
M17411
