Honeywell R7426B, R7426A, R7426C dimensions Configuration and Control Parameters

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

CONFIGURATION AND CONTROL PARAMETERS

The controllers R7426A,B,C include two groups of settings*) (I and II) for control and configuration parameters that are automatically selected during programming. For parameter Ctrltyp = Lo, setting I is selected, and for parameter Ctrltyp = Hi1/Hi2, setting II is selected.

config. par.

 

 

description

 

default

R7426

actual

no.

name

 

 

 

setting

A

B

C

value

 

 

 

 

 

 

C.01

DIR/REVY1

Selects the output action of Y1 to adapt the valve or damper direction

 

Dir

 

 

x

 

C.02

DIR/REVY3

Selects the output action of Y3 to adapt the valve or damper direction

 

Dir

 

 

x

 

C.03

DIR/REVY2

Selects the output action of Y2 to adapt the valve or damper direction

 

Dir

 

 

x

 

 

 

Dir

Direct acting output signal

 

 

 

 

 

 

 

 

 

 

Rev

Reverse acting output signal

 

 

 

 

 

 

 

 

C.04

Ctrltyp1)

Control

type selects the setpoint operating range and default parameter

 

Lo

x

x

x

 

 

 

setting I or II.

 

 

 

 

for I

 

 

 

 

 

 

set-

operating range

 

setting*)

 

 

 

 

 

 

 

pt.

 

 

 

 

 

 

 

 

 

 

 

 

Lo

0...50°C

for ventilation systems (factory preset)

 

I

 

 

 

 

 

 

 

Hi1

0...130°C

for heating systems

 

II

 

 

 

 

 

 

 

Hi2

0...130°C

with pump ON/OFF operation

 

II

 

 

 

 

 

C.05

CPATYP

Selects

the Control Point /SetPoint Adjustment type.

 

 

0

x

x

x

 

 

 

CPA

potentio-

CPA/SPA

sensor / remote setpoint unit type

 

 

 

 

 

 

 

TYP

meter range

range

numbers

 

 

 

 

 

 

 

 

0

internal

CPA: ±5K

internal

 

 

 

 

 

 

 

 

1

953...1053Ω

CPA: ±5K

T7412B1016 (Pt 1000)

 

 

 

 

 

 

 

 

2

100kΩ...0Ω

CPA: ±5K

T7412B1057 / T7412C1030 (Pt 1000)

 

 

 

 

 

 

 

T7412B1008 / T7412C1006 (NTC 20kΩ)

 

 

 

 

 

 

 

 

 

 

43193982-001

 

 

 

 

 

 

 

 

 

3

10...20kΩ

SPA:

T7412B1024 (BALCO 500)

 

 

 

 

 

 

 

 

15 ... 30°C

T7412B1040 (Pt 1000)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

0...10kΩ

CPA: ±5K

HCW 23 (setpt wheel printed with +/- 5 K)

 

 

 

 

 

 

 

5

0...100kΩ

SPA: 15...30°C

43193982-001

 

 

 

 

 

 

 

 

6

0...100kΩ

SPA: 0...50°C

43193982-001

 

 

 

 

 

 

 

 

 

or 0...130°C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C.06

YRange

Selects

the output

control range for

all outputs (Y1, Y2, and Y3)

 

1

 

 

x

 

 

 

0

2 ... 10 Vdc

 

 

 

 

 

 

 

 

 

 

 

1

0 ... 10 Vdc

 

 

 

 

 

 

 

 

 

C.07

Startup

Enables the start-up routine

 

 

 

OFF

 

x

x

 

 

 

OFF

Disabled

 

 

 

 

 

 

 

 

 

 

 

ON

Enabled

 

 

 

 

 

 

 

 

 

C.08

Y1Mode

Y1 output mode selects an individual output function for Y1

 

4

x

x

 

 

C.09

Y3Mode

Y3 output mode selects an individual output function for Y3

 

4

 

x

 

 

C.10

Y2Mode

Y2 output mode selects an individual output function for Y2

 

4

 

x

 

 

 

 

0

Synchronous / floating

 

 

 

 

 

 

 

 

 

 

1

2 stage ON/OFF

 

 

 

 

 

 

 

 

 

 

2

3 stage binary coded ON/OFF

 

 

 

 

 

 

 

 

3

Pulse-width modulation

 

 

 

 

 

 

 

 

 

 

4

Unconfigured

 

 

 

 

 

 

 

 

 

C.11

YMode

Selects

the output mode for sequence operation or multistage ON/OFF func.

0

 

x

x

 

 

 

0

Damper, cooling and heating (Y1,Y2, Y3)

 

 

 

 

 

 

1

Sequence control for heating or cooling (Y1,Y2, Y3);

 

 

 

x

x

 

 

 

or 6-stage ON/OFF

 

 

 

 

 

x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

Sequence control for heating (Y1, Y3) and cooling (Y2);

 

 

 

x

x

 

 

 

or 4-stage ON/OFF for heating (Y1, Y3), and cooling (Y2)

 

 

 

x

 

 

 

 

 

 

 

 

 

 

 

 

3

Sequence control for cooling (Y1, Y3) and heating (Y2);

 

 

 

x

x

 

 

 

or 4-stage ON/OFF for cooling (Y1, Y3), and heating (Y2)

 

 

 

x

 

 

 

 

 

 

 

 

 

 

 

 

4

Two-position damper control (Y1), heating (Y3) and cooling (Y2)

 

 

 

x

x

 

 

 

5

15-stage binary coded ON/OFF for heating (Y1, Y3), and cooling (Y2)

 

 

x

 

 

 

 

 

 

Table 4. Configuration parameters R7426A,B,C

 

 

 

 

 

 

3

EN1B-0203GE51 R0507C

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Contents Before Installation Note GeneralMounting Terminal WiringPower Supply and Grounding Terminal Connection Controller to CPA/SPA potentiometerConfiguration and Control Parameters Y1CTRF Minpos SoffsNoffs Output Control Range Selection YRange C.06 Configuration SettingsControl Point / Setpoint Adjustment Cpatyp C.05 Operating Range Selection Ctrltyp C.04Sensor Type Senstyp C.14 Output Signal Mode YMode C.11Supply of Temperature Signal T2 T2ext C.12 Limit Type LimTyp C.13Parameter Settings Adjustment Tr1 Tr2 Reset Time tr1 / tr2 P.12 / P13Throttling range and reset time reference Application Sens Throttling Range Xpc / Xph P.10 / P11Summer / Winter Compensation Authority Su / Wi P.04 / P.05 Night Mode Offset Noffs P.26 Controller with RTC onlyStart Point Ystart P.15 Compensation Changeover Point Wcomp P.03Runtimex, x = Y1, Y2, or Y3 P.21...P.23 Operating OverviewReturn Air Offset RetOffs P.20 Minimum Position Minpos P.14Operating overview Changing Operating ModesTime Out Standard display modeSelecting Parameters Adjusting Configuration / Parameter ValuesResetting Param. Values to Default Values Displaying Actual ValuesOutput Selection Mode Using the Schedules with RTC, only Example of annual schedule no defaultDay1 Point Adjusting Date and Time with RTC, only Selecting Clock and Schedules with RTC, onlyProgramming Standard Schedule with RTC, only Programming Holiday Schedule with RTC, only Interpreting Error MessagesAnnual schedule Weekly schedule and holiday types Automation and Control Solutions

R7426C, R7426A, R7426B specifications

Honeywell's R7426 series comprises three advanced models: R7426B, R7426A, and R7426C. These devices are designed to optimize control for HVAC applications, emphasizing energy efficiency, ease of use, and superior control capabilities. Each model incorporates unique features and technologies catering to specific system requirements while maintaining common foundational characteristics.

The R7426B is engineered with a microprocessor-based control system, allowing for precise temperature management across varied environments. It supports a range of heating and cooling applications, making it versatile in both residential and commercial settings. The unit boasts dual-stage heating and cooling capabilities, ensuring optimal comfort by allowing for gradual temperature changes. It also includes an easy-to-read LCD display for user-friendly navigation and parameter adjustments.

R7426A enhances functionality with additional communication technologies. This model incorporates Honeywell's proprietary communication protocols, enabling seamless connection with smart thermostats and home automation systems. This ensures users can monitor and control their HVAC systems remotely, leading to enhanced energy management and convenience. R7426A also includes advanced diagnostic capabilities that simplify troubleshooting and maintenance processes.

R7426C further extends the capabilities of the series by integrating state-of-the-art sensors for real-time environmental monitoring. These sensors continuously track indoor air quality parameters such as humidity and particulate matter levels, allowing for immediate adjustments to maintain optimal indoor conditions. The model is also equipped with smart algorithms that learn user preferences over time, automatically adjusting settings to enhance comfort and efficiency.

Common features across the R7426 series include robust construction for long-lasting performance and compatibility with a wide range of HVAC systems, including heat pumps and conventional heating systems. Each model supports programmable settings, enabling users to create schedules that align with their unique lifestyle or business needs. Safety features, including freeze protection and delay timers, are integrated to safeguard against potential system failures.

Overall, the Honeywell R7426B, R7426A, and R7426C models represent a significant advancement in HVAC control technology. With their focus on efficiency, automation, and user-centric design, these devices help users achieve optimal climate management in their spaces while minimizing energy consumption. Whether for residential comfort or commercial efficiency, these models stand out as reliable solutions in the HVAC market.
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