Model NCM 300 Zone Control System - EWC

Model NCM 300 Zone Control System

TB-206

LEAVE THIS BULLETIN ON THE JOB SITE FOR FUTURE REFERENCE

Compatible

HVAC Systems

Compatible

Thermostats

Will control heat pumps with O or B

type reversing valves and electric

auxiliary heat. Will also control 1 or 2

stage gas or oil fired furnaces, with

single stage electric air conditioning.

Regardless of the application, use

standard 24vac, 4/5 wire heat/cool

mechanical or electronic thermostats

in all zones! Mercury, Battery, and

Power robbing types that draw less

than 20 ma of current can also be

used. Compatible with a select type of

heat pump thermostat in zone 1 only.

Automatic

Heat/Cool

Changeover

The NCM300 panel features automatic

changeover from any thermostat

allowing for individual zone comfort

from the HVAC system.

Status LED

The STATUS LED blinks slowly during

normal operation to indicate the micro

processor is operating properly.

System LEDs

A total of 9 LED¡¯s indicate the system

status and mode of operation.

Damper LEDs

LEDs labeled Zone 1 thru Zone 3

indicate which dampers are energized

to open.

Operating

Power

Operates on 24VAC power supplied

from a separate transformer. A single

40VA transformer can power all three

zones, with a total of four dampers.

8va draw per damper.

25

40

30

35

5

34

2nd STAGE

TIMER

R7

M6

M4

M2

M1

130

46

LOW TEMP

LIMIT

52

+

F1

24 VAC

T'FORMER

C5

D6

OFF < > ON

K4

D7

R44

SYSTEM

R53

K6

D9

R57

R56

RC/RH

LINK

R12 ZONE 3

T'STAT

R18

U3

R19

R23

R24

R25

R29

C6 C7

C

W

Y

R

G

R32

R33

TIMER

RESET

K7

D10

C

W

Y

R

G

R30 ZONE 2

R34 T'STAT

R38

R37

R40

U4

R39

R42

R43

R41

ZONE 1

T'STAT

R46

R47

R49

R52

R51

1

R13

R45

K5

D8

W2/E

W1/B

O

Y

G

RH

RC

R11

FAN DELAY OFF < > ON

PURGE 60s < > 90s

AUTO CHANGEOVER 2m< >5m

SYSTEM HEAT PUMP< >GAS

FAN HYDRO < > GAS U5

OP SYS 0m< >20m

SAS OFF < > ON

NOT USED

R

C

Y1

2

R9

U1

R28

R27

K3

D5 R31

Z1

R35

U2

D2

C4

CPU

RESET

R36

SUPPLY

AIR

R10 SENSOR

R5

170

HIGH TEMP

LIMIT

C2

C3

R15

R17

R16

K2 R21

D4 R20

R22

R6

160

110

R26

C8

C1 D1 R4 R8

150

NCM-300

R14

ZONE 1

MOTOR

140

49 120

K1

D3

ZONE 2

MOTOR

M6

M4

M2

M1

43

37

S1

Controls two or three air zones with

most 24vac Power Open/Closed or

Spring Assisted motorized dampers.

M6

M4

M2

M1

20

15

10

Copyright EWC/ACI 2002

ALL rights reserved

Zone Capacity

ZONE 3

MOTOR

NCM300 Ver 1.2

The NCM 300 panel provides intelligent control of Heat

Pump or Conventional forced air zoning systems at a

maximum of three zones using motorized dampers and

practically any off-the-shelf heat/cool thermostat. With

features like automatic changeover, one zone setback

feature, field selectable timers and supply air sensing

capability, the NCM 300 provides a high level of

performance in a non-expandable zone control panel.

Perfect for new construction and retro-fit applications.

R48

LED1

STATUS

LED2

SUPPLY AIR LIMIT

R54

LED4

ZONE 3 OPEN

R55

LED3

ZONE 2 OPEN

LED6

ZONE 1 OPEN

R60

LED5

W2 / EM

R61

LED7

W1 / REV VALVE

LED8

COMPRESSOR

R50

R59

C

W

Y

R

G

EM

ONE

ZONE

R58

R63

R62

R65

R

LED9

CONTROL SYSTEM

FAN

CONTROLS INC.

Englishtown, NJ

Figure 1. NCM300 panel

Thermal

Breaker

The NCM300 has a thermal circuit

breaker in place of a fuse, and

protects the panel from shorts in the

thermostat and damper field wiring. It

does not protect against shorts in the

HVAC system wiring.

CAUTION: When the circuit breaker is

tripped it will get quite hot. To reset the

breaker, locate and repair the short,

remove the 24vac power for 30

seconds and then restore it.

Watch Dog

Circuit

The panel has a built-in circuit that

monitors the computers performance

and resets the panel if an error occurs

in operation or due to power failures.

Indoor Fan

Control

Any zone can activate the indoor fan

and only the dampers in zones calling

for continuous fan operation will open.

Continuous fan operation will only

occur when there are no heating or

cooling calls.

P/N 090375A0206 REV. J Copyright C EWC Controls 2000 All Rights Reserved

EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362

E-Mail- info@

Built-In Timer

Settings

The panel has built-in timers that

insure reliable operation.

*Short Cycle Timer

2 minutes, fixed.

Momentarily pressing the TIMER

RESET button clears the built-in

timers controlling the minimum run

timer, short cycle timer, W2 timer, and

the changeover timer. This enables

you to test the installation faster.

Caution should be observed when

using this button.

Timer Reset

BUTTON

TIMER

RESET

*Minimum Run Timer 2 minutes, fixed.

*Changeover Timer 2 or 5 minutes

.

*Opposing System 20 minutes, fixed.

Service Timer

*Second Stage

Heating Timer

Minimum Run

Timer

When a call is activated the panel will

run the system in that mode for a

minimum of 2 minutes.

When the system is satisfied, the

panel will not resume the same call for

a minimum of 2 minutes.

Changeover

Timer

A built-in timer prevents the system

from rapidly switching between

heating and cooling. At the end of a

call, an adjustable 2 or 5 minute timer

is started and the panel will not switch

to the opposing system until the timer

has expired.

20

15

25

10

30

5

35

W2 TIMER

The W2 TIMER sets the total amount

of time delay before second stage

heating is energized. 1st stage heat

will stay energized when 2nd stage

heat activates.

Heating and Cooling

Limit Settings

The Heating Limit potentiometer sets

140

130

150

120

160

110

170

HEATING LIMIT

40

37

34

43

46

49

52

COOLING LIMIT

2

SYSTEM

RESET

Momentarily pressing the CPU RESET

button resets the computer.

5 to 35 minutes,

adjustable.

Short Cycle

Timer

Stage Two

Heating Timer

CPU Reset

BUTTON

the supply air temperature at which

the heating is cycled off and the fan

continues to run, until the supply air

temperature has dropped below the

heating limit set point.

The Cooling Limit potentiometer sets

the supply air temperature at which

the cooling is cycled off and the fan

continues to run, until the supply air

temperature has risen above the

cooling limit set point.

Selecting the Options Using the DIP Switches

7 DIP switches allow you to select the features that will

allow the panel to operate your HVAC system.

FAN DELAY

OFF < > ON

DIP switch 1 allows the NCM300 to

operate the fan during the 60/90 second

purge mode. Works in heat and cool

mode. Set the switch to OFF to allow the

system to operate it¡¯s own fan purge.

PURGE 60s < > 90s

DIP switch 2 selects a purge time of 60

seconds or 90 seconds. The damper(s) on

the last zone(s) calling will be held open

for 60 or 90 seconds.

AUTO 2m < > 5m

CHANGEOVER

Select between 2 or 5 minutes of

change over time delay. The panel will

not switch to the opposing system

until the timer has expired.

SYSTEM TYPE

HEATPUMP < > GAS

Select the type of HVAC system the

panel is controlling. Heat Pump or

Gas/Oil/Hydronic heat with A/C.

FAN HYDRO < > GAS Select the GAS position when setting

up for gas or heat pump applications.

Select HYDRO when setting up for

straight electric or hydronic heating

applications.

OP SYS 0m < > 20m

Select 20 minutes of time delay for

opposing system calls or, 0 minutes

and the panel will work on majority

rules only.

SAS OFF < > ON

Select ON if you are using a Supply

Air Sensor with the NCM300. Select

OFF if you have not installed a sensor.

NOTE:

EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362

DIP SWITCH #8 HAS NO FUNCTION

AND IS NOT USED!

E-Mail- info@

INSTALLATION INSTRUCTIONS

WARNING: THESE PANELS ARE DESIGNED FOR USE WITH 24VAC. DO NOT USE OTHER VOLTAGES! USE CAUTION TO

AVOID ELECTRIC SHOCK OR EQUIPMENT DAMAGE. ALL WIRING SHOULD BE DONE TO LOCAL AND NATIONAL CODES

AND ORDINANCES. USE 18 AWG SOLID COPPER, COLOR-CODED, MULTI-CONDUCTOR THERMOSTAT CABLE.

The NCM300 zone control panel requires standard 1 stage heat/cool thermostats in all zones,

regardless of the application. 2nd stage heat output is controlled by an adjustable timer on the

panel. The NCM300 will work with a select type of heat pump thermostat in Zone 1 only. Easy

thermostat wiring diagrams are shown below.

Thermostat

Wiring

HEAT PUMP THERMOSTATS

ZONE THERMOSTAT

FAN

AUTO

WHITE-RODGERS

1F94-371

ZONE THERMOSTAT

#1

70

80

80

50

60

ZONE 1

T'STAT

SYSTEM

COOL OFF HEAT

ON

70

ZONE 1

T'STAT

60

C

W

Y

G

R

E W1 W2 Y1

C

50

R

G

E2

*

C

W

W

Y

Y

R

R

G

G

EM

EM

ONE

ZONE

ONE

ZONE

Program thermostat for

* ¡°Heat

Pump 3 mode¡±.

Add jumper wire as shown.

Set the ¡°E2/P¡± switch to E2.

Figure 2c.

Figure 2a. Typical heat/cool thermostat

wiring in zone 1, 2, or 3.

Zone 1 will accept heat pump style thermostats with a constant 24vac

output during Emergency Mode, and/or separable W1 and Y terminals.

Use a programmable White Rodgers 1F94-371 or Honeywell Model

T8011 programmable or T8411 non programmable. Other compatible

Models include the White Rodgers 1F93-380, 1F95-377, and the

CTC Model# 43403.

ZONE THERMOSTAT

ZONE 1

T'STAT

FAN

AUTO

C

Honeywell #T8011 or T8411

ZONE THERMOSTAT

70

80

80

50

60

SYSTEM

COOL OFF HEAT

ON

W

70

60

Y

R

ZONE 1

T'STAT

50

W

Y

R

G

G

EM

Optional

VAC or RES

SWITCH

ONE

ZONE

4

C

RED

LED

W

Figure 2b. Typical heat/cool or heat pump application

wiring in zone 1, with separate Vacation or

Emergency Heat switch. Part #VAC or RES.

Y

4:31pm

Fr

72

o

Hold

Select

FAN

SYSTEM

Auto On

Cool Off Heat Em. Ht.

C

3

2

Em. Ht.

Aux. Ht.

W1 E

Y W2 R

O

G

L

B

*

**

R

G

Zone 1 will also accept heat pump style thermostats

with a constant 24vac output during emergency mode,

and separable W1 and Y terminals. These thermostats

can be field configured & programmed to conventional

heat / cool operation.

A White Rodgers Model 1F94-371 programmable is

compatible with the NCM300. A Honeywell T-8011

programmable or T-8411 non-programmable is also

compatible. These versatile thermostats can be set up

in Conventional mode, and still allow use of the Heat

pump features. (i.e. Emergency Mode)

EM

ONE

ZONE

Figure 2d.

*NEW JUMPER

**REMOVE JUMPER

Wiring for heat pump thermostat in zone 1.

NOTE: Constant L output in the Emergency

heat mode. Remove the factory jumper

between W1 and Y terminals and install a

new jumper between W1 and E terminals.

EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-635-8646

E-Mail- info@

3

System Wiring The NCM300 panel was designed to

be easy to understand and wire up.

We have provided several typical

diagrams to review. Your actual field

wiring may vary.

Single

Transformer

Gas/Electric

Systems

Typical heat pump system wiring with electric

Heat Pump

resistance backup heat. Wire up the reversing

with O Type

valve to either O or W1/B, depending on your

Reversing Valve type of system. Applies to air cooled or

geothermal / ground source systems.

Typical gas/electric system wiring

using a single transformer is shown

below. Note the jumper (link)

between RC and RH. There is no

need to install your own jumper.

AIR HANDLER

WITH 1 0R 2 STAGE

ELECTRIC RESISTANCE

BACKUP HEAT

HEAT PUMP

1 STAGE

W1

W1

W2

W2

SYSTEM

X/W

Y

GAS/OIL

Furnace

1or2 STAGE

OUTDOOR

CONDENSING

UNIT

Y

C

NCM300

OorB

C

R

NCM300

Y

Y

G

G

C

C

R

R

*

W2

W2/E

W1

W1

W1/B

Y1

Y1

G

G

C

C

R

R

O

Y

G

RH

RC

O

Y

G

RH

RC

RC/RH

LINK

SYSTEM

W2

W2/E

W1/B

* Connect either the O or the W1/B.

In a typical O type reversing valve system, there

will not be a connection to the W1/B terminal!

Figure 3c. Conventional Heat Pump System

RC/RH

LINK

Simple Fossil Fuel Application

Figure 3a.

FOSSIL FUEL SET-UP w/OAT

Two

Transformer

Systems

* Note: Your Air Handler may include a W terminal. That

means it may have it¡¯s own isolation circuit. If you can

confirm this, simply connect the W1/B terminal to the W

terminal on the air handler. Do not cut the Rc / Rh

jumper. Wire up your Oil Burner, Circulator relay, or

Hydronic Zone valve to the isolation contacts or wires

provided in the air handler. (Follow dashed lines)The fan

is controlled via time delay relay inside the air handler.

HEAT PUMP

1 STAGE

OUTSIDE AIR

T¡¯STAT 25* F.

Part# BTDP

X

O

Y

C

B

R

R

OUTDOOR

CONDENSING

UNIT

TYPICAL FAN

CENTER

TERMINAL

BLOCK

W*

*W

Y

C

Y

Y

G

G

C

C

R

R

T

T

ISOLATION

TERMINALS

OR WIRES

Either One

Not Both

OIL

BURNER

T

PRIMARY

CONTROL

T

CIRCULATOR

RELAY OR HOT

WATER ZONE VALVE

CONNECTION

W

GAS/OIL

Furnace

1or2 STAGE

W2

NCM300

SYSTEM

W1

Y

Discharge Air

T-stat 135* F.

G

C

W2/E

W1/B

R

O

Y

G

RH

RC

NCM300

RC/RH

LINK

Cut Rc/Rh

Jumper

NOTE:

Discharge Thermostat can

be adjustable Snap-disc

type, or Remote bulb type.

Opens on temperature rise

to lockout the ¡°Y¡± circuit.

Range = 100 - 200 F.

SYSTEM

W2/E

W1/B

O

Y

G

RH

RC

RC/RH

LINK

T

T

Figure 3d. Single stage heat pump and 1or 2 stage furnace.

Figure 3b.

4

EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-635-8646

E-Mail- info@

DAMPER WIRING

Note: All zone dampers default to the "OPEN"

position after a purge delay has occurred.

Dampers also default ¡°OPEN¡± during

changeover & short cycle delays, and when

all zone demands are satisfied, and no

signals are detected from the thermostats.

2 Wire Spring Return Motor Wiring

EWC Controls

Spring Return Motor Wiring

MA-ESR

REFERENCE THESE DIAGRAMS PRIOR TO

INSTALLATION AND POWER WIRING. DOING SO WILL

SAVE TIME AND LABOR LATER ON.

M6

M4

M2

M1

{

Either one

Not both

NC NO C M M

ZONE MODULE DAMPER

MOTOR TERMINAL BLOCK

DESIGNATION & FUNCTION

ZONE

MOTOR

Terminal M6

Terminal M4

Terminal M2

Terminal M1

24vac to Close a damper(s)

M6

M4

M2

M1

24vac to Open a damper(s)

Constant 24vac HOT

Common 24vac

Auxilary

SPDT

End Switch

Dry Contacts

Rated for

24vac only

A Spring Open Damper is wired to M1 & M6

.

A Spring Close Damper is wired to M1 & M4

Figure 5

Multiple MA-ND & MA-URD

Damper Wiring on a Single Zone

.

Figure 4a

All Models MA-ND & MA-URD Damper Wiring

1 4 6

ZONE

MOTOR

M6

M4

M2

M1

M6

M4

M2

M1

1 4 6

1 4 6

ZONE

MOTOR

Figure 4b

All Models SMDL & BMDL Damper Wiring

1 4 6

Patented Optical

Damper Motor Actuators

Patented Optical

Damper Motor Actuators

or new Min/Max Actuators

1 2 4

ZONE

MOTOR

Patented Optical

Damper Motor Actuators

Figure 4c

M6

M4

M2

M1

Figure 6

On all these dampers and most older style

dampers, including competitor¡¯s dampers,

always wire up number to number.

Contact EWC Controls Technical Support

when you are on the job site for assistance

with damper wiring.

Do not overload your transformer!

EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362

E-Mail- info@

5

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