User Guide

Momentarily pressing the RESET button
clears the built-in timers controlling the
Start-up timer, Minimum run timer, Short
cycle timer, W2 timer, Supply air sensor
timer and the Changeover timer. This
enables you to test the installation faster.
Caution should be observed when using
this button.
Pressing the RESET button for 7
seconds will reset the CPU.
RESET
RESET
BUTTON
HC < TSTATS > HP
OFF<PURGE ASST>ON
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX [phone] E-Mail- [e-mail]
2
110
120
130
140
150
160
170
HIGH TEMP
LIMIT
34
37
40
43
46
49
52
LOW TEMP
LIMIT
The panel has built-in timers that
insure safe HVAC system operations.
When a call is activated, the zone
panel will run the HVAC system in that
mode for a minimum of 2 minutes.
When the HVAC system is satisfied,
the zone panel will not resume the
same call for a minimum of 2 minutes.
At the end of a call, a 4 minute timer is
started and the zone panel will not
switch to the opposite mode of
operation until the timer has expired.
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. If desired turn the
Timer OFF and let your heat pump
thermostats stage up for you.
The Heating Limit potentiometer sets
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. 3 Minutes min.
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. 3 Minutes min.
Built-In Timer
Settings
Minimum Run
Timer
Short Cycle
Timer
Changeover
Timer
2nd Stage
Heating Timer
Heating and Cooling
Limit Settings
*Short Cycle Timer
*Minimum Run Timer
*Changeover Timer
*Opposing System
Service Timer
*Second Stage
Heating Timer
2 minutes, fixed.
2 minutes, fixed.
4 minutes, fixed.
.
20 minutes, fixed.
Off or 7 to 42
minutes, adjustable.
8 DIP switches allow you to select the features specific
to your very own zoned HVAC system.
Select the type of HVAC system the
panel will control. Heat Pump (HP) or
Gas/Oil/Hydronic with A/C. (GAS)
Selecting the Options Using the DIP Switches
Select 45 seconds to allow the hot
water or steam coil to heat up before
the fan starts. Select 0 seconds and
the fan will start immediately upon a
call for heat. Switch # 8 must be set
to HYDRO for this feature to work!
HP < SYSTEM > GAS
0< FAN DLY > 45S
OFF < SAS > ON
7
14
21
28
35
42
STAGING
W2 TIMER
OFF
Reset the CPU
anytime you make
dip-switch changes
to the NCM300 panel!
DO NOT use a sharp
object to press the
button! Your finger
tip will work fine.
Select the type of Thermostats you
will use. Select HC for conventional
Heat/Cool type thermostats or select
HP for Heat Pump type thermostats.
Select ON to allow the NCM300 to operate
the fan during the 90/120 second purge
cycle. Works in both heat and cool mode.
Set the switch to OFF to allow the system
to operate on it’s own fan purge cycle.
90< PURGE >120s
Select a purge time of 90 seconds or 120
seconds. The damper(s) on the last zone
calling will be held open for that time while
all other zone dampers remain closed.
0 < RV > B
Select O or B for the type of
Reversing Valve operation of your
heat pump.
Select ON if you are using a Supply
Air Sensor with the NCM300. Select
OFF if you have not installed a sensor.
GAS< FAN >HYDRO
Select the GAS position when setting
up for gas or heat pump systems.
Select HYDRO when setting up for
Straight Electric or Hydronic
(Steam/Hot Water) heating systems.
TIMER DEFINITIONS
Opposing
System
Service Timer
A 20 minute delay must expire, or the
active zone(s) must satisfy, before
the panel will honor a thermostat
demand to changeover to the
opposite mode of system operation.
*Start-up Delay Timer
4 minutes, fixed.
Start-Up Delay
Timer
Upon initial power up or after a
power failure, the panel will not start
the equipment for 4 minutes.