Dungs EMP-5 Installation Instruction - Page 3

Browse online or download pdf Installation Instruction for Controller Dungs EMP-5. Dungs EMP-5 9 pages. Current or voltage input drive modulating actuator

Print Page

Operation Description

The actuator's position is proportional to the input current

from the primary controller. The current-to-position convertor

is a solid state switching device attached to the side of the

die cast housing and receives its feedback signal from the

built in potentiometer in the actuator with a wiper arm driven

by the output shaft.

The signal input is factory set from 4 - 20 mADC, (but is field

adjustable). The deadband is also adjustable. Deadband is the

difference between the input signal, which will drive the motor

one way, and the level, which will drive it the opposite way.

Installation

Inspect unit before installing, look for broken parts or leaks.

Use NEMA Type 4 compatible type connectors.

Observe the barrier that separates the line voltage terminals

from the low voltage which operates the actuator motor. All

connections to the line voltage side of the barrier (L1 and L2,

1, 5 and 6 terminals) must be made with Class 1 wiring; con-

nections to the remaining terminals can be Class 2 thermostat

cable if desired.

Allow 6 inches (152 mm) clearance above the actuator wiring

compartment.

Replacing EMP-3 or EMP-4 with EMP-5

• When replacing an EMP-3 or EMP-4 with an EMP-5 and

if the high fire override is not used, then follow the wiring

schematic "EMP-4 to EMP-5 without using high fire

override" for the low voltage input leads.

• When replacing an EMP-3 or EMP-4 with an EMP-5 and if

the high fire override is used, then follow the wiring sche-

matic "EMP-4 to EMP-5 using high fire override" for the

low voltage input leads so that the EMP-5 drives closed with

a low fire override input and open with a high fire override

input from the flame safety.

• When replacing an EMP-3 with an EMP-5, there is no need

to connect to the "run" terminal of the flame safety.

• Red wire on EMP-3 is replaced with violet/white wire on

EMP-5, which must be connected to the LOW terminal on

the flame safety and the - lead on the temperature control-

ler. See schematic below.

EMP-4 to EMP-5

without using

high fire override

EMP-5 low voltage

input leads

3 ... 9

Typical Flame Safety Inputs

•

COM

High

Low Run

Violet/

•

White

Violet

–

Blue

•

Yellow

•

–

4 - 20 mA

Output

Temperature controller or

Transducer with 24 VDC outlet power

Three adjustments are possible:

1) degree of counterclockwise travel.

2) the point of auxiliary switch actuation.

3) on the EMP 424-5 and EMP 454-5 models, the ability to

slow the normal travel time by approximately 10 times.

All wiring must comply with local electrical

codes, ordinances and regulations .

Do not adjust the limit switch beyond 90° unless the standard

slidewire has been replaced with a 180° slidewire; do not

adjust beyond 180° for proportioning control.

In some applications, a Flame Safeguard (FSG) may have

one or two overriding circuits. One being a low fire purge start

and the other a hight fire pre-purage. The function of the violet/

white and violet wires are to provide an electrical connection

so that the FSG can override, the temperatur controller and

drive the air damper actuator without a 4 mA signal. If such

connections are not needed in the application, simply tape

them off, and safely stow away.

• Blue wire on EMP-3 is replaced with blue wire on EMP-5.

• Orange wire on EMP-3 is replaced with yellow wire on

EMP-5.

• When replacing an EMP-4 with an EMP-5, follow the wiring

schematic below for the low voltage input leads so that the

EMP-5 drives closed with a low fire override input and open

with a high-fire override input from the flame safety.

• When replacing an EMP-4 with an EMP-5, there is no need

to connect to the "run" terminal.

• White wire on EMP-4 is replaced with violet / white wire on

EMP-5, which must be connected to the LOW terminal on

the flame safety and the - lead on the temperature control-

ler. See schematic below.

• Black wire on EMP-4 is replaced with blue wire on EMP-5.

• Red wire on EMP-4 is replaced with yellow wire on EMP-5.

EMP-4 to EMP-5

using high fire

override

135 Ohm

Potentiometer

•