Zonex SAMOD User manual

SAMOD
Stand-Alone or Floating Zone
Modulating Damper Control
SAMOD OVERVIEW
The system is designed for over-conditioned areas and prevents over-heating and over-cooling of individual or
stand alone zones. The SAMOD is an auto changeover thermostat that communicates to a fully modulating
round or rectangular damper or D-Fuser.
Auto changeover operation allows the SAMOD thermostat to change from a cooling to a heating thermostat
automatically. A duct sensor is included and installed upstream of the damper to determine the temperature
in the duct. If the SAMOD thermostat is calling for cooling and cool air is available in the duct the damper will
modulate open. A heating call will close the damper. If the sensor determines warm air is available in the
duct and the thermostat is calling for heat the damper will modulate open. The SAMOD system senses the
duct temperature and compares it to the set point vs. room temperature providing warm or cool air as
required. If the thermostat is not calling for heating or cooling the damper will modulate to 40% for
ventilation.
The SAMOD allows you to effectively control problem areas by controlling the existing air supply to the
problem room or zone. This versatile problem solver is also designed to control supplemental or
auxiliary heating devices.
Zonex auto changeover thermostat is designed to control and modulate a stand alone diffuser or damper.
Zonex offers 600 unique sizes of round and rectangular dampers for your commercial applications.
SAMOD solves the problem of over-heated and over-cooled rooms for your customers
SAMOD FEATURES
Auto Changeover 7-day Programmable
Control Fully Modulating Dampers
Display Duct Temp at the Stat
Adjustable Aux or Reheat Operation
F or C Temperature Operation
Single Set Point for Easy End User Operation
Set point lock
Auto / Off switch
Remote Sensor Capability
Slave capability – up to 3 dampers per stat
No Batteries Required
Non-volatile Memory
[phone] |zonexproducts.com

WIRING INSTALLATION INSTRUCTION
INSTALLATION
1. Install the SAMOD thermostat in the zone on an interior wall away from direct sunlight, supply air currents, or any heat
generating source.
2. Install ST series Round, Rectangular or D-FUSER Damper into the supply air duct.
3. Wire supply damper to SAMOD controller sub-base using three conductor 18 gauge thermostat wire.
4. Install a 24 volt, 40 VA transformer in accordance with local code requirements. From the transformer - run 18/2 wire
and connect to SAMOD thermostat terminals TR1 and TR2.
5. Install Leaving Air Temperature Sensor (TS) in the ductwork prior to the supply damper and run sensor wires to the SAMOD.
If wires need to be extended, 18 gauge thermostat wire may be used, not to exceed 100 ft. in length.
6. Duct Air Temperature (TS) sensor wires are connected to the DS terminals of the SAMOD thermostat.
*NOTE: An air proving switch (field supplied) must be used for reheat applications. A field supplied relay may be required for VAV box
applications.
DISCHARGE AIR
AUX
TR-1
(OPTIONAL)
DUCT HEATER
INDEPENDENT
24V /40VA
TRANSFORMER
SUPPLY AIR DUCT
TR2
TR1
RO
RC
MC
AUX
C
DS
DS
DUCT
RC RO MC
DS
DS
TS-1
T-1
ZONEX SAMOD
THERMOSTAT
TRANSFORMER
LAT SENSOR
TERMINAL CONNECTIONS
T-1
TR-1
TS-1
SAMOD
SYSTEM POWER 24 V- 40 VA
DUCT TEMPERATURE SENSOR
TR-1
TR-2
RO
RC
MC
DS
AUX
SAMOD CONTROLLER AND ACTUATOR
24 VAC POWER INPUT
24 VAC POWER COMMON
DAMPER RUN OPEN SIGNAL
DAMPER RUN CLOSED SIGNAL
24 VAC MOTOR COMMON
DUCT TEMPERATURE SENSOR
OPTIONAL AUXILIARY HEAT
NOTES: PROVIDE MODULATING ZONEX ROUND OR
RECTANGULAR DAMPER OR D-FUSER DESIGNED TO
SUPPORT UP TO 1.75” S.P.
AUX CONTACTS USED TO CONTROL SUPPLEMENTAL
HEAT SOURCE: I.E. BASEBOARD OR RADIANT PANEL IF
ELECTRIC HEAT IS USED AN AIR PROVING SWITCH MUST
BE INSTALLED
VISIT OUR ON-LINE CATALOG AT ZONEXPRODUCTS.COM
FOR APPLICATIONS ASSISTANCE CALL 800-228-2966
CAUXILIARY HEAT COMMON

OPERATING INSTRUCTION
OPERATION
Using the Up and Down button, select your required set
point:
UP - Increases set point.
DOWN - Decreases set point.
Confirm “AUTO” icon appears above the third button on the
thermostat to maintain zone comfort based on thermostat set
point, room temperature and duct temperature.
FUNCTION BUTTONS
AUTO - Configures controller for AUTO mode or OFF mode
(Hold Auto/Off for 15 seconds to turn SAMOD Off/On)
DUCT - Pressing this button displays supply air temperature
MENU - Accesses system configuration functions
DUCT TEMPERATURE
To check the duct temperature press “DUCT” and the current
temperature in the duct will be displayed.
LOCKING SAMOD CONTROLLER
The SAMOD controller can be locked hiding MENU functions
and preventing set point from being changed greater than 2
degrees above or below selected set point. To lock SAMOD
controller, press and hold DUCT button for 10 seconds. To
unlock, press DUCT button for 10 seconds; MENU will be
visible and temperature set point can be changed.
CALIBRATION
Press MENU button and scroll to CALIBRATE using the
Up/Down buttons, when highlighted, press SELECT. Use the
Up/Down to set the desired room temperature, press EXIT to
save.
SETUP AUXILIARY HEAT/REHEAT
Press MENU button and scroll by pressing the Up/Down
buttons through menu options. When SET AUX HEAT option
is highlighted, press SELECT. Two options are offered,
BASEBOARD or REHEAT.
If BASEBOARD is desired press SELECT button to select
desired temperature dead band by scrolling through 2, 3 or 4
degrees, when selection is highlighted, press EXIT. Once
desired HEAT DEAD BAND is set, press EXIT. Follow the
same steps but highlight Reheat if desired.
This will complete the setup for Auxiliary / Reheat.
TEMPERATURE FORMAT
Press MENU button and scroll to TEMPERATURE FORMAT
using the Up/Down buttons, when highlighted, press
SELECT. Use the Up/Down buttons to choose F° or C°, press
SAVE when selection has be made.
DAMPER ADJUSTMENT
The ST series zone dampers are factory set for full open and
close operation. Each damper is equipped with adjustable
stops for field setting the maximum open and minimum close
positions if desired.
The SAMOD is an Auto Changeover thermostat that modulates a zone damper based on supply air and room temperature.
System logic dictates system mode of operation. When duct temperature is 3 degrees or more below room displayed
temperature on the SAMOD thermostat, the mode is set as Cool. When duct temperature is 7 degrees or greater than room
temperature as displayed on SAMOD thermostat, then mode is set for Heat. If duct temperature is neither 3 degrees below
nor 7 degrees above room temperature displayed on SAMOD thermostat, then mode is set for Vent for continuous air
circulation.
UP
DOWN
SET POINT
AUTO / OFFDUCT TEMP
MENU
ROOM TEMP