Honeywell R7426C, R7426B, R7426A dimensions Minpos, Soffs, Noffs

R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK

control par.

description

setting I / setting II

reso-

unit

R7426

actual

no.

name

low

high

def.

lution

A

B

C

value

P.01

W1

Main setpoint for input T1

0

50 /

21

/

0.5

°C

x

x

x

130

70

P.02

Wlim

Limit setpoint (low or high) for input T2

5 /

50 /

16

/

1

°C

x

x

x

30

130

90

P.03

Wcomp

Compensation changeover point for input T3

-5

40

20

1

°C

x

x

x

P.04

Wi

Winter compensation authority

-350

+350

0

2

%

x

x

x

P.05

Su

Summer compensation authority

-100

+100

0

1

%

x

x

x

P.06

Wcas

Submaster or cascade setpoint

OFF, 0

50

20

0.5

°C

x

x

x

P.07

Rcas

Cascade reset span adjustment

0

40

10

0.5

K

x

x

x

P.08

Xp1

Throttling range (main control loop) for T1

0.5

40

2

0.5

K

x

x

x

P.09

Xp2

Throttling range (cascade or limit control loop)

0.5

40

10

0.5

K

x

x

x

for T2

P.10

Xpc

Cooling throttling range for sequence control

OFF, 1

40

3

0.5

K

x

x

P.11

Xph

Heating throttling range for sequence control

1

40

6

0.5

K

x

x

P.12

tr11)

Reset time (main control loop)

OFF,

20

OFF

10/

sec/

x

x

x

20 sec

min

0.5

min

P.13

tr21)

Reset time (cascade control loop)

OFF,

20

OFF

10/

sec/

x

x

x

20 sec

min

0.5

min

P.14

MINPOS

Minimal pos. for air damper actuators

0

50

20

1

%

x

x

P.15

Ystart

Start point for mid range shift of output Y1

-20

+20

0

0.5

K

x

x

x

P.16

SOFFS

Offset of main setpoint in Standby mode

0

10

2

0.1

K

x

x

x

P.17

T1Cal

Calibration of temperature sensor T1

-20

+20

0

0.1

K

x

x

x

P.18

T2Cal

Calibration of temperature sensor T2

-20

+20

0

0.1

K

x

x

x

P.19

T3Cal

Calibration of temperature sensor T3

-20

+20

0

0.1

K

x

x

x

P.20

RetOffs

Return air offset to simulate exhaust air cond.

OFF, 0

5

OFF

0.1

K

x

x

P.21

RuntimeY1

Actuator run time for Y1

6

180

60

1

sec

x

x

P.22

RuntimeY3

Actuator run time for Y3

6

180

60

1

sec

x

P.23

RuntimeY2

Actuator run time for Y2

6

180

60

1

sec

x

P.24

NightLow2)

Night low limit against temperature extremes

OFF, 8

19

OFF

1

°C

x

x

x

P.25

NightHigh2)

Night high limit against temperature extremes

OFF, 21

40

OFF

1

°C

x

x

x

P.26

NOFFS2)

Offset of main setpoint in Night mode

0

30

5

0.1

K

x

x

x

1)for tr > 2 min ⇒ resolution = 0.5 min, for tr < 2 min ⇒ resolution = 10 sec

2)on Controllers with Real-Time Clock, only

For detailed information of control parameters see chapter Parameter Settings and Adjustment.

Table 5. Control parameters R7426A,B,C

5 EN1B-0203GE51 R0507C