RTC DFC Bedienungsanleitung

DOC# T0008 2.23.2016 DFC O&M 1

Ph. (877) 351-4702 www.RTC-Solutions.com 4380 Oakes Road, Suite 804

Fax (919) 845-8102 Email: info@RTC-Solutions.com Davie, FL 33314

Model No. DFC

DIGITAL ENHANCED GAS FIRED MODULATING CONTROL

This manual covers the following product(s):

DFC Direct Fired Control

Table of Contents

Overview............................................................................................................................................................................2

Normal Operation ................................................................................................................................................................2

Programming ......................................................................................................................................................................3

Features.............................................................................................................................................................................3

Valve Connections ...............................................................................................................................................................4

Menu Map...........................................................................................................................................................................5

Installation .........................................................................................................................................................................6

Specifications......................................................................................................................................................................6

DOC# T0008 2.23.2016 DFC O&M 2

Ph. (877) 351-4702 www.RTC-Solutions.com 4380 Oakes Road, Suite 804

Fax (919) 845-8102 Email: info@RTC-Solutions.com Davie, FL 33314

ENT RT

Overview

The Direct Fired Control (DFC) is a digital gas fired heating control. The control has a simple five button interface with a

four digit LED display. All programmable parameters can be accessed through the user menu with the five button

interface. The DFC’s setpoint temperature sensing operation ranges from 40°F (4°C) to 250°F (121°C). There is a

temperature sensor input that connects to provide a discharge temperature. The setpoint may be adjusted by the controls

internal menu settings or by an external remote, such as the DFTD and RDU. There is a combination of two modulating

outputs that will power both 0-24V DC and 0-10V DC valve. User parameters are stored in non-volatile memory, and are

retained even during a power outage. Also, the DFC is powered by 24V AC.

Normal Operation

The DFC will always display the current discharge air temperature. Press the or

key to change the discharge setpoint temperature. Once the key is pressed, the LED will

display the text for the current setpoint temperature. Use the or key in order to set

a new discharge temperature. Then press the key to save the changes made. If a key is

not pressed for 10 seconds, the DFC will exit without saving. When adjusting the setpoint

range, the setpoint cannot surpass the set Low and High values. For instance, if Low

(“SPLo”) is set to 80°F and High (“SPhi”) is set to 150°F, the setpoint is adjustable between

80°F to 150°F.

0-10VDC Valve

24VDC Solenoid Valve

DFTS

DFTD

24V AC

RDU

ENT

DNUP

Figure 2: DFC Keys

Figure 1: DFC Schematic Layout

DOC# T0008 2.23.2016 DFC O&M 3

Ph. (877) 351-4702 www.RTC-Solutions.com 4380 Oakes Road, Suite 804

Fax (919) 845-8102 Email: info@RTC-Solutions.com Davie, FL 33314

Programming

Please refer to the “DFC Menu Map” on Page 4 for programming in program mode. To enter program mode, hold the

key down for 3 seconds until “SPLo” is displayed. Use the and keys to navigate to the desired menu

parameter as shown in column 1. To edit a menu parameter, press the key once on the desired parameter. Displayed

will be the current value of that parameter as shown in column 2. Use the and keys again to edit the parameters

for column 2. Press the key to save the changes made or the key to cancel without saving and return to column

1. If a key is not pressed for 10 seconds or the key is held for 3 seconds while in program mode, the control will

return to normal mode.

Features

Alarms:

Error messages on the DFC will be scrolled across the display with a detailed message. This will allow users to realize the

issue in order to resolve the error faster. Below are the list of errors and their meanings.

1. “dFtS oPEn” – There is no Discharge Temperature Sensor connected to the DFC. Therefore, no discharge

temperature reading can be made.

2. “dFtd oPEn” – The user has the Remote (“rEtd”) parameter on the DFC enabled, but no external control is found

to take a reading.

3. “dFts ShortEd” – There is a short in the connection of the Discharge Temperature Sensor.

4. “dFtd ShortEd” – The user has the Remote (“rEtd”) parameter on the DFC enabled and there is a short in the

connection.

To resolve an issue check the wiring connections. Please refer to “Installation” on page 5 for proper terminal connections.

Password:

When trying to access program mode, if the DFC is password protected the display will show “PASS”. Otherwise the

display will show “SPLo”, which is the start of program mode. If password protected no menu settings may be altered

until the correct password is entered. In order to enter the password press the key while “PASS” is displayed and

use the and keys to set the DFC to the factory set password (21). Once on the number 21, press the key

again to access program mode. If the wrong password is entered then the DFC will return to normal mode.

Modulating Valve Outputs:

The DFC has the ability to power either a 24V DC or a 10V DC modulating valve. Only one valve at a time may be connected.

ENT

LTENT

ENT

Connection for 0-24V DC use terminals 7 and 8

Connection for 0-10V DC use terminals 8

and 10

7 PWM For Solenoid Valve

824VDCValveOutput

9 0‐10VDC Valve Output

10 Valve Ground

Figure 3: DFC Modulating Output

Terminals

DOC# T0008 2.23.2016 DFC O&M 4

Ph. (877) 351-4702 www.RTC-Solutions.com 4380 Oakes Road, Suite 804

Fax (919) 845-8102 Email: info@RTC-Solutions.com Davie, FL 33314

Valve Connections

DFC Solenoid ACT-4.0 Belimo Siemens

Term 7: PWM PWM

Term 8: 24VDC 24VDC Red: 24VDC 2: 24VDC Red: 24VAC

Term 9: 0-10V Output Green: 0-10V Input 3: 2-10V Input Gray: 0-10V Input

Term 10: Ground Blue: Ground 1: Ground Black: Ground

DOC# T0008 2.23.2016 DFC O&M 5

Ph. (877) 351-4702 www.RTC-Solutions.com 4380 Oakes Road, Suite 804

Fax (919) 845-8102 Email: info@RTC-Solutions.com Davie, FL 33314

Menu Map

vEr

What you want to do What you see What it means

DFC Menu Map

Column 1 Column 2

Set the lowest the user can adjust the

tem

erature to in normal mode for set

oint.

Adjust the discharge setpoint.

Set the Valve Maximum Output percentage.

Valve Reverse Output.

Select the desired aggression/speed of the PID

curve for the valve

(

Standard, Low, or Hi

)

Low (SPLo) can be set from 40°F - 240 °F and must be

at least 10°F less than the High. High (SPhi) can set be

from 50°F - 250°F and must be at least 10°F greater

than the Low. These will limit how far the user can

change the temperature outside of programming

mode.

Setpoint (SP) may be adjusted within the menu map or

on the main screen with the up and down arrows, then

pressing enter to save the selected setpoint.

When adjusting the discharge setpoint temperature

above the outside air it will result in turning the

burner on and modulate the system at that specified

setpoint.

Column 1 shows the menu parameters

Arrow Keys:

Up and Down: to navigate or adjust a menu parameter

Right: to access column 2 for editing a parameter

Left: to return to column 1 without saving a parameter

Enter: to return to column 1 with saving a parameter

ENT RT

Column 2 shows the factory set defaults for each

parameter. Temperature defaults are shown in °F.

Figure 4: Menu Map

PASS

100

dAbL

EnAb

1.0

vdEL

vLo

SPhi

rEtd

9 0

7 0

dAbL

EnAb

SPLo

ENT

Set the highest the user can adjust the

temperature to in normal mode for setpoint.

Enables or Disables the use of an external remote

control for adjusting the setpoint.

Set the Valve Startup Delay from 0 to 30 seconds.

Set the Valve Minimum Output percentage.

Remote (rEtd) allows the user to use the DFC’s built-in

interface when disabled (dAbL) or an external remote

control when enabled (EnAb) in order to adjust the

setpoint.

dAbL

vhi

EnAb

Std

Pid

rEvo

° C

° F

toFS

ForC

Set a temperature offset. For examples, to correct

for duct losses or sensor calibration errors.

Set the control to convert the temperature to

dis

either °F or °C.

The password may either be enabled or disabled.

View the software version number.

Valve Minimum Output (vLo), controls the percentage

the valve will operate when in the closed position

Valve Maximum Output (vhi), controls the percentage

the valve will operate when in the open position

Valve Reverse Output (rEvo), causes the valve voltage

output to be inverted. For example, if the discharge

temperature increases then the valve voltage output

will decrease

DOC# T0008 2.23.2016 DFC O&M 5

Ph. (877) 351-4702 www.RTC-Solutions.com 4380 Oakes Road, Suite 804

Fax (919) 845-8102 Email: info@RTC-Solutions.com Davie, FL 33314

Menu Map

vEr

What you want to do What you see What it means

DFC Menu Map

Column 1 Column 2

Set the lowest the user can adjust the

tem

erature to in normal mode for set

oint.

Adjust the discharge setpoint.

Set the Valve Maximum Output percentage.

Valve Reverse Output.

Select the desired aggression/speed of the PID

curve for the valve

(

Standard, Low, or Hi

)

Low (SPLo) can be set from 40°F - 240 °F and must be

at least 10°F less than the High. High (SPhi) can set be

from 50°F - 250°F and must be at least 10°F greater

than the Low. These will limit how far the user can

change the temperature outside of programming

mode.

Setpoint (SP) may be adjusted within the menu map or

on the main screen with the up and down arrows, then

pressing enter to save the selected setpoint.

When adjusting the discharge setpoint temperature

above the outside air it will result in turning the

burner on and modulate the system at that specified

setpoint.

Column 1 shows the menu parameters

Arrow Keys:

Up and Down: to navigate or adjust a menu parameter

Right: to access column 2 for editing a parameter

Left: to return to column 1 without saving a parameter

Enter: to return to column 1 with saving a parameter

ENT RT

Column 2 shows the factory set defaults for each

parameter. Temperature defaults are shown in °F.

Figure 4: Menu Map

PASS

100

dAbL

EnAb

1.0

vdEL

vLo

SPhi

rEtd

9 0

7 0

dAbL

EnAb

SPLo

ENT

Set the highest the user can adjust the

temperature to in normal mode for setpoint.

Enables or Disables the use of an external remote

control for adjusting the setpoint.

Set the Valve Startup Delay from 0 to 30 seconds.

Set the Valve Minimum Output percentage.

Remote (rEtd) allows the user to use the DFC’s built-in

interface when disabled (dAbL) or an external remote

control when enabled (EnAb) in order to adjust the

setpoint.

dAbL

vhi

EnAb

Std

Pid

rEvo

° C

° F

toFS

ForC

Set a temperature offset. For examples, to correct

for duct losses or sensor calibration errors.

Set the control to convert the temperature to

dis

either °F or °C.

The password may either be enabled or disabled.

View the software version number.

Valve Minimum Output (vLo), controls the percentage

the valve will operate when in the closed position

Valve Maximum Output (vhi), controls the percentage

the valve will operate when in the open position

Valve Reverse Output (rEvo), causes the valve voltage

output to be inverted. For example, if the discharge

temperature increases then the valve voltage output

will decrease

DOC# T0008 2.23.2016 DFC O&M 6

Ph. (877) 351-4702 www.RTC-Solutions.com 4380 Oakes Road, Suite 804

Fax (919) 845-8102 Email: info@RTC-Solutions.com Davie, FL 33314

Installation

Figure 5: DFC Front Panel Figure 6: DFC Side view

***All dimensions are in inches ***

Wiring for the DFC is convenient for the user with easy access to all terminal connections.

Specifications

Power Requirements

Current Rating 24V Output

DFC Ambient Temperature Limits

Operating

Accuracy

24V AC Nominal

(18VAC/DC – 26VAC/DC)

-40-149°F (-40-65°C)

+/-3°F (1°C)

4.84

4.93

4.50

1.527

Figure 7: DFC Terminal

Number Layout

124VAC

224VAC

3DFTS

4DFTS

5DFTDorRDU

6DFTDorRDU

7 PWM For Solenoid Valve

824VDCValveOutput

9 0‐10VDC Valve Output

10 Valve Ground

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