Delta DFC-304R3-240 User manual

NSTALLATION

UIDE

DFC-304R3-240 Rev 2.1 Installation Guide

Document Edition 1.1

Product Description

The DFC-304R3-240 Fan Coil Controller is a

line powered, fully programmable (via GCL+)

Native BACnetApplication Controller that

communicates using the BACnet MS/TP

protocol. Direct 240 VAC line voltage terminal

connections are provided for one, two, or three

speed fans (up to 1 HP).

The binary model, with additional 4 triac

outputs, covers a wide range of Fan Coil Unit

applications, including two and four pipe fan

coils. And room temperature can be a

standard 10K sensor or a BACstat II

connected via a secondary LINKnet network

and 24 VAC power out connection.

Important Information

This controller has terminals for connecting 240VAC (Class 1, Line Voltage). The terminals are

safety rated, however this controller may have to be mounted in an enclosure if it is not

mounted inside the FCU. Check local electrical codes.

Package Contents

Product: DFC-304R3-240 (Rev. 2.1)

DFC-304R3-240 Installation Guide

Related Documents

Delta Controls Wiring Guidelines

DSC/DSC Release Notes for related Firmware

Delta Controls General System Description (Delta Products System Architecture Description)

Delta Controls

Page 2 of 8

Cautions or Warnings

Personal injury/loss of life may occur if procedures are not performed as specified.

If this equipment is used in a manner not specified by the manufacturer, the protection provided by

the equipment may be impaired.

Do not open the controller. There are no field serviceable parts or field adjustments inside.

Equipment damage or loss of data may occur if the user does not follow a procedure as specified.

This controller is an Electro-statically sensitive device. Proper ESD protection (ground strap) should

be used when installing this product so that damage to the product does not occur.

Mounting

The Fan Coil Controllers must be mounted inside the Fan Coil Unit box for safety reasons due to the presence

of 240 VAC at terminal blocks.

The Fan Coil Controllers are mounted directly on a flat panel using the end mount tabs with two screws.

Board Layout

DFC-304R3 Rev 2.1 Installation Guide.doc

Page 3 of 8

Device Configuration

Device Type

Various products have the capability of being configured as one of several

possible device types, which represents the network level that it will reside on

in the network architecture (Area, System, Subnet). Other than the one device

acting as a router, all other devices on the same network segment must be

configured the same.

System/Subnet: The DFC-304R3-240 is a Subnet device only. It cannot be

configured as a System device.

AREA

SYSTEM

SUBNET

Derived Network Addressing

The DNA jumper comes ON by default. This allows the device to automatically

configure a BACnet device address. This should NOT be removed unless you

are assigning a BACnet device number through software. The BACnet device

number should not be confused with the DIP switch setting, and each device

must still have a unique dip switch address even when using software to define

the device number.

DNA

Device Addressing

The Dip Switch is a binary switch. Each individual DIP switch represents a

unique value, which forms the device address when added together.

To set the address, simply move the switches that add up to the devices

desired address to the ON position.

Example: If the device is to be address 5 on the network, set the switch

numbered 4 and the switch numbered 1 (equals 5) to the On position.

Note: Each device on the same MS/TP segment must have a unique DIP

switch address.

Refer to the DNA section of the ORCAview Technical Reference Manual, and

the General System Description for more information on DNA and

System/Subnet devices.

Delta Controls

Page 4 of 8

Wiring General

All wiring must conform to NEC and local codes and regulations.

Use stranded or solid copper wire with 80ºC and 300 V rated insulation

Connect protective earth ground

A Disconnect Switch and/or Circuit Breaker shall be included in the

building installation, (as required by local building code). The Circuit

Breaker must be sized to accommodate the controller’s power and the

maximum load connected to the Fan Motor Relay outputs

The Disconnect Switch shall be marked as the disconnect switch for the

equipment, and mounted in close proximity of the equipment to allow for

power disconnect for servicing

Determine supply rating by summing total VA of product and Fan Motor

load

For the Line Voltage terminals, use 18 AWG to 12 AWG, (sized for Fan

motor load) stranded or solid copper wire with Class I insulation

Keep Class 2 wiring separate from Class 1 wiring

Power

The Fan Coil Controllers require 240 VAC 2000VA maximum, this includes fan motor load and low voltage

circuitry. The on board transformer must only be used to provide power for the controller electronics, valve

actuators powered through outputs, and 1 DNS-24L BACstat II connected to Class 2 Power. Class 2 inputs and

outputs on the DFC’s follow the same general wiring connection diagrams as other Delta Controls products.

If too much power is drawn from the on-board transformer, a re-settable fuse will be

activated. After the fault has been fixed, power must be removed from the unit for 1

minute to allow the fuse to automatically reset.

Network Communication

The controller communicates on Twisted Pair Ethernet 10-BaseT using BACnet IP and BACnet over Ethernet,

or on an RS-485 LAN using the BACnet MS/TP protocol. Refer to Delta Controls Wiring Guidelines for further

details.

DFC-304R3 Rev 2.1 Installation Guide.doc

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MS/TP (RS485) Wiring

For detailed information on MS/TP and LINKnet wiring refer to Delta Controls Wiring Guidelines.

The proper specified cabling must be used to ensure reliable communications. (22-24 AWG

twisted pair, 100-120 ohms impedance, 17 pF/ft or lower capacitance, with a braided or aluminum

foil shield.)

Controllers should always be wired together in a daisy-chain fashion. Attempting to connect them

using a starred or bus configuration will cause problems on the network.

Networks with a total length greater than 4000 ft or with more than 50 devices require a repeater

(RPT-768).

LINKnet networks that have only 1-2 devices, and have less then 100 ft of cable length do not

require network terminators.

Input and Output Wiring

Inputs and outputs on the DFC-304R3-240 controller follow the same general wiring connection diagrams as

other Delta Controls products. Refer to separate documentation for additional details.

Input Configuration

The input must be configured to accept the signal used by

the input device. Place the jumper for each input in the

correct location on the Input Type Selector Block. The

diagram to the right shows the factory default selection of

10 KΩ.

4-20mA For sensors that use a 4 to 20 mA signal.

10K For 10 KΩThermistor temperature

sensors, as well as Dry Contact binary

inputs.

5V For sensors that use a 0 - 5 VDC signal.

10V For sensors that use a 0 -10 VDC signal.

Delta Controls

Page 6 of 8

Output Configuration

Triac Outputs

DFC outputs switch INTERNALLY sourced 24VAC only.

They cannot switch an external 24Vac power source.

The triac outputs are intended to drive a 24VAC tri-state or

two-position valve actuator.

In the default FCU database, OP1 and OP2 are used to

position a tri state heating valve actuator, and OP3 and

OP4 are used for a tri state cooling valve actuator.

Fan Speed Relay Operation

The relay interlock circuitry only allows the highest speed select terminal to be energized. Speed I and II relays

are disconnected by the hardware interlock circuitry when Speed III relay is active. The hardware interlock

operates when two or more outputs are on, then the highest speed select terminal is energized.

The DFC controller hardware does not allow more than one fan relay to be energized at the same time. The

default database will switch the fan speeds without any programmed time delay. Should this controller be used

with FCU equipment that requires delays when switching the fan speeds, the database must be modified to suit.

It is recommended that the Speed III terminal be used for single speed fan applications; use

Speed II and III terminals for two speed fan applications.

Database Backup

A Super capacitor is used for SRAM database backup. This device does not require maintenance or

replacement during the lifetime of the product. While the product is powered up, the Super capacitor is

automatically charged. After 48 hours of charging time, the Super capacitor has 100% backup time capacity.

There is a possibility of data loss if the Super capacitor charging time is too brief.

Network Communications Setup

The controller communicates on a BACnet MS/TP network at a default speed of 76,800 bps. Refer to the

ORCAview Technical Reference Manual for further detail on configuring the BACnet MS/TP network or

changing baud rates, etc.

Indicators

LED

Function

Description

Outputs

(OP1 – OP7) Output Status

Indicators This green LED is on or off to match the binary status of the

associated output, or on with increasing intensity for analog

outputs.

Scan CPU Scan Indicator This red LED flashes at a rate relative to the CPU scan rate.

DFC-304R3 Rev 2.1 Installation Guide.doc

Page 7 of 8

Network

(NET1) MS/TP (RS485)

Communication

Status Indicators

The green LED flashes to indicate when the device is transmitting

out the port, and the red LED flashes to indicate when the device

is receiving data through the port.

Network

(NET2) MS/TP (RS485)

Communication

Status Indicators

The green LED flashes to indicate when the device is transmitting

out the port, and the red LED flashes to indicate when the device

is receiving data through the port. If communication is good, both

LEDs will flash at a high rate.

MS/TP Error MS/TP (RS485)

Network Error

Indicator

This red LED flashes to indicate a communication error or wiring

mistake on the RS-485 network.

Product Specifications

To add additional specifications put the cursor on the outside right of the table and click enter to add a row.

Power Requirements 240 VAC 50/60Hz

2000 VA maximum

Class 1

18 AWG to 12 AWG copper wire non-removable terminal blocks

(90°C minimum rated wire or equivalent to be used)

Power Consumption 24 VAC, 50/60Hz

3.0 VA maximum for BACstat

5VA maximum per pair of triac outputs

Class 2, SELV

Ambient Ratings Temperature: 32º to 113º F (0º to 45º C)

Humidity: 10 to 90% RH (non-condensing)

Altitude: under 6500 ft. (2000 m.)

Installation Category: II

Pollution Degree: 2

Communication Ports

NET1

Main LAN BACnet MS/TP (RS-485)

Communication: 9600, 19200, 38400, 76800 bps (default)

Maximum of 99 devices (50 without a repeater)

NET2

SubLAN

LINKnet

Communication: 76800 bps

Maximum 4 devices on LINKnet, with no more than 2

DFM/DNT devices per controller.

Note: Onboard transformer only provides enough power for

1 BACstat.

Inputs 1 10 KΩThermistor Dry Contact Input

2 Universal Inputs (10 bit), jumper configurable for the following input

types:

0-5 VDC

0-10 VDC

10 KΩThermistor

Dry Contact (using 10 KΩThermistor jumper setting

4-20 mA

Delta Controls

Page 8 of 8

Outputs 1-4, Class 2

(24VAC) 4 Binary Triac Outputs with LED status indication

Switching 24 VAC @ 5VA maximum per pair of outputs

(OP1, OP2, OP3 and OP4)

Leakage Current per triac is 160 µA

Internal 24 VAC power only

Outputs 5-7, Class 1

(Line Voltage) 3 Binary Relay Outputs for Fan Speed control with LED status

indication

Switching 240 VAC @ 1 HP

Switching 250 VAC @ 8 A, Resistive Load, [PF=1.0]

Switching 250 VAC @ 4 A, Inductive Load, [PF=0.4]

Internal Line Voltage Power only

18 AWG to 12 AWG Copper wire non-removable terminal

blocks

Technology 16 bit processor

1 MB (8 megabit) Flash Memory

256 KB SRAM memory (64 available for database)

Database backup via non-volatile Flash memory

Super-capacitor SRAM back-up

Power and Status indication of the CPU with SCAN LED

MS/TP Error indication with separate LED

Listings BACnet Testing Labs – BTL Listed (with at least V3.22 Firmware)

refer to www.bacnetassociation.org/bacnet_testing.htm

Compliance CE – EMC Directive 89/336/EEC & IEC 61010-1

FCC – Class B

ICES – Class B

Accessories

TRM-768 Delta Network Terminator for MS/TP

RPT-768 Delta Network Repeater for MS/TP

Model Number

DFC-304R3-240

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