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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