SMART 4000
Commercial Multi-stage HVAC Controller
Installation and Operation Manual
www.robertshaw.com
©2015 Robertshaw
7/15 – 352-00199-001
by Uni-Line®
2
IMPORTANT SAFETY INFORMATION
WARNING:
WARNING:
WARNING:
Do not switch system to cool if the temperature is below 50°F (10°C). This can damage your
cooling system and may cause personal injury.
Do not short (jumper) across terminals on the gas valve or at the system control to test
installation. This will damage the thermostat and void the warranty.
Do not connect ground to any terminal in this unit.
All wiring must conform to local and national building and electrical codes and ordinances.
Use this thermostat only as described in the manual.
3
CONTENTS
IMPORTANT SAFETY INFORMATION 2
Installation 5
Wiring Overview 5
Powering the SMART 4000 5
Commissioning Aids 7
Info Window 7
Service Override 7
Service Mode 7
Relay Test Mode 8
Economy Test Mode 8
Typical Wiring Diagrams 8
Typical Heat Pump System - Four Compressors 8
Two Stage Cooling With Drive Open Drive Closed Hot Water Valve 9
Single Stage Water Sourced Heat Pump 10
0 to 10V Wiring 10
Sensor Wiring 10
Two Wire Sensors 10
Four Wire Sensors 12
Installer Menu 15
Operation 27
The PIN Prompt 27
4
Programming 28
Advanced Features 31
Economy Cycle 31
Economy Logic 33
CO
2
Input 33
Valve Control 34
Output Relay 35
Compressor Lead Lag 35
Four Wire Sensors 37
Communications Functions 38
Specifications 40
Troubleshooting 41
Five Year Limited Warranty 42
®
Smart Sense
TM
HVAC controller. The SMART 4000 will
provide your clients with many years of trouble-free comfort control.
premium product.
The Smart Sense
TM
SMART 4000 product is under constant revision, upgrade and enhancement
for errors or omissions contained in this document. It is the responsibility of the user to ensure
in a safe manner.
5
INSTALLATION
The SMART 4000 is a DIN rail-mounted device that has been designed to precisely control a
ensure the thermostat is simple to set up and install, ensuring reliable control of commercial
HVAC systems.
provided throughout this manual.
R - 24 Volt Acve
C - 24 Volt Common
B
A
0 - 10V output - 1
0 - 10V Common
0 - 10V output - 2
S1
S2
S3
S4
Room Sensor Input
Sensor Common
0 - 10V input
Aux input 1
Aux Common
Aux input 2
Modbus
Communicang
Sensor
100 - 270V AC N
NC
100 - 270V AC A
NC
R-Common
Fan
Compressor 3
Compressor 2
Compressor 1
Cool1 NC
Heat
Neat NC
Aux Com
Aux NO
DIP switches
Figure 1
The SMART 4000 can be powered from 24V AC (± 15%) or from 100 to 270V AC.
Use one power input only.
The A and N inputs are used for powering the thermostat from line voltage (270V max).
Equipment Connections
control drive open/drive closed valves. All other relays are single pole normally open.
the thermostat relays or the equipment that the thermostat is controlling.
Do not exceed the maximum current handling capacity of any of the thermostat relays.
Communications Terminals
CAUTION:
0 to 10V Outputs
page 23.
0 to 10V Inputs
The standard room temperature sensor provided with the thermostat is wired to the Room
Sensor Terminal and Sensor Common terminal next to it. It is recommended that 30 AWG
(0.25 mm) or larger shielded pair cable is used and the shield wire grounded in a suitable
where the sensor cable is run close to other electrical cabling.
problems associated with long cable runs or interference in the sensor wiring. This sensor is a
digital sensor. Shielded cable is required on all cable runs with the shield wire grounded in a
the auxiliary input to the Aux Common terminal next to them.
CAUTION:
7
Table 1.
Table 1
On
1
If Sw2 = On HC - Heat Fan Logic
Energize in Heat
Energize in Cool
2 Equipment Control Logic Heat Pump Heat/Cool
Commissioning Aids
To assist commissioning the SMART 4000 there are a
number of aids provided.
outputs, the room and outside air temperature sensor, as well as whether a relay is ON or OFF.
AO1 and AO2 show the two Analog output values. RT shows the room temperature. OT shows
outside air temperature. D1 and D2 show the two digital inputs' status (0 = Open 1 = Closed).
the 0 to 10V input voltage.
thermostat OFF when you wish to temporarily suspend
either Enable or Disable.
CAUTION:
8
Relay Test Mode
connected to the AC equipment while performing this test or damage to the AC system may be
Economy Test Mode
LED will be ON and the LCD will show Economy Test. The fresh air damper will be held at 10V
and the return air damper will be held at 0V.
Typical Wiring Diagrams
A number of typical wiring diagrams are provided in this manual. This list does not represent all
manufacturer as well as other diagrams within this manual.
manner.
Typical Heat Pump System - Four Compressors
120 - 240V AC Neutral
120 - 240V AC Acve
Control Acve
Fan
Compressor 3
Compressor 2
Compressor 1
Reversing Value
Compressor 4
R C
Four Wire
In this example the thermostat
is running a heat pump
system with four compressors
providing four stages of
cooling.
The thermostat is being
powered by 240V AC in this
example.
Sw1 OFF – Rev in Heat
ON – Rev in Cool
Sw2 OFF – HP Mode
Installer Options
For four compressor systems
Set aux relay = Comp 4
9
120 - 240V AC Neutral
120 - 240V AC Acve
Control Acve
Fan
Cool 2
Cool 1
Open
Closed
R C
Four Wire
Heating Valve
and cooling relays in the
thermostat are a changeover
type. This allows you to drive
open and/or closed.
Sw1 OFF – Fan ON with heat
Sw2 ON – HC Mode
Installer Options
None required.
Control Acve
Fan
CWP call (Oponal)
Heat 1
Heat 2
R C
Four Wire
In Valve Mode, both the relays
thermostat to modulate the 0
to 10V valve and also call for
a cooling demand if required.
are shown in this example.
Sw1 OFF – Fan ON with heat
Sw2 ON – HC Mode
Installer Options
Set aux relay = Aux heat
Set Y1= Cool
10
Single Stage Water Sourced Heat Pump
R C
Four Wire
Control Acve
Fan
Compressor
R/Valve
R - 24V Acve
C - 24V Common
This is similar to a standard
single stage heat pump except
that the auxiliary input is set
to shut the thermostat down
system.
This fault input can be used as
a phase fail input or any other
The thermostat LCD will
indicate when a fault (low
water) is detected.
Sw1 OFF – Rev in heat
ON – Rev in cool
Sw2 OFF – HP Mode
Installer Options
Set Aux input 1 to Fault.
0 to 10V Wiring
Sensor Wiring
The thermostat will accept two types of temperature sensors. The standard two wire sensor
The standard two wire sensors are suitable for room temperature monitoring only. There are a
number of types of two wire sensors available, an overview is provided below. Two wire sensors
connect to the Room Sensor terminal and the Common terminal next to it on the thermostat.
Two wire sensors are not polarity dependent.
The SMART-R-02 – Uses two wires to communicate the room temperature to the thermostat.
controller. The SMART-R-02 sensor is supplied as standard in the
box with each thermostat controller.
SMART-R-02
Aer Hours iniate
Room
Com
11
(± 2 C degrees) adjustment of room temperature from the
the room occupants to reduce the room temperature without
a typical indoor range of approximately
100 feet (30 m).
Duct sensors (SMART-R-03) are also
or duct space temperature monitoring
Auto O or Vent Mode
– An open circuit room sensor turns the thermostat OFF.
Vent – An open circuit room sensor will permit the indoor fan only
to operate during occupied Start periods.
Full Vent - An open circuit room sensor will run the indoor fan
for as long as the sensor open circuit exists, regardless of current
program.
Aer Hours Run Funcon
a single two wire sensor it is possible to:
measure room temperature
offset the room temperature, altering comfort levels by
± 3F (± 2C),
initiate (or cancel) an after hours heating or cooling call,
shut the thermostat down,
place the thermostat in fan-only Ventilation Mode.
SMART-R-05
Aer Hours iniate
Room
Com
Aer Hours iniate
SMART-R-02
SMART-R-02
Aer Hours iniate
Room
Com
12
Averaging Room Sensors
When it is necessary to measure the room temperature in
of room sensors. The thermostat will control using an average of
these temperatures with the two wire sensors.
An example of averaging in two, three and four places is
for the three and four averaging sensors example.
SMART-R-02 SMART-R-02SMART-R-02
SMART-R-02 SMART-R-02SMART-R-02 SMART-R-02
Aer Hours Switch
Aer Hours Switch
Figure 2
CAUTION:
Four Wire Sensors
sensor with displays for room temperature, set temperature, and adjustments.
can be associated with two wire sensors.
NOTE:
disabled when the thermostat detects that an indoor four wire sensor is installed. You
Sensor with Display (SMART-R-02V)
Smart Sense four wire sensors measure both humidity and
temperature. They are used when economy cooling is required,
Two versions of four wire sensors are available. The display
This permits the set temperature to be adjusted within the
SMART-R-02 SMART-R-02
13
thermostat to its previous state. If the thermostat is set to manual control, the thermostat will
on that schedule.
Sensor Without Display
The standard four wire sensor measures temperature and humidity without
designed for use as an outside air sensor and can be used for an inside
sensor if required.
CAUTION:
standard two wire dry bulb sensor for remote temperature monitoring. This input overrides the
NOTE:
Sensor Wiring
Terminals 1 and 4 power the sensor (12V DC ± 4V is normal) while terminals 2 and 3
communicate data between each sensor and the thermostat.
The sensors must be wired in series only and no two sensors should have the same DIP switch
NOTE: You may power the four wire sensor locally from a 12V DC power supply and connect
the thermostat to the sensor using terminals 2 and 3.
Four Wire
Figure 3
14
Ancillary Input wiring
The thermostat has two digital inputs that have been provided to permit a digital signal
If two inputs contradict each other, input one has priority.
regardless of what input they are on.
box, however, some adjustment of the standard thermostat parameters may need to be
The thermostat has a comprehensive advanced Installer Menu. This menu permits you to adjust
of the thermostat.
three digit PIN before advancing to the next step. Refer to
A typical Installer Menu window is shown here.
Menu.
for three seconds, you will immediately leave the Installer
Menu.
surrounding the menus, the cool set temperature in this example.
15
NOTE:
once you exit this menu.
INSTALLER MENU
Change Programming
Change Auxiliary Relay
Change Auxiliary Input
Change Analog Output
1
The thermostat has a three digit PIN from 000 to 199 that is used to access various menu
items if enabled by the installer. This menu permits you to see the current PIN and change it.
Should you wish to change the PIN, you must enter it twice. If both PINs match, the new PIN
is updated and must be used on all future PIN requests.
NOTE: If you change and then forget this PIN, the thermostat must be returned to an authorized
Use this menu item to set the security access for the various menus within the controller.
Options
OFF
Set Temp Only – The user can alter the set temperatures without requiring a PIN but will be
prompted for the PIN before entering the Schedule and Installer menus.
Set and Program Only – The user can edit the Set Temperature and Time Schedule menus,
– All menu items require a PIN to enter.
The thermostat can operate as either a programmable controller or manual controller
Options
– If selected, the thermostat will turn ON and run 24 hours per day, 7 days per
Manual – The thermostat relies on an external signal to turn it ON or OFF. This external signal
Start and the OFF event is named Stop.
want the thermostat to start during one day, run past midnight and stop the next day. See
thermostat that will override the normal 7 day 1 event program. This is useful for pre-
programming the thermostat to be OFF for common holidays.
17
4 F (49
Options
Heat F to 120C to 49C).
Cool – The lowest cooling setpoint that can be adjusted, 43F to 120C to 49C).
NOTE: Regardless of the setpoint limits, the thermostat is designed to maintain the cooling
apart so the setpoints do not overlap.
Holiday Schedule on page 29 of this manual.
Options
HeatF to 120C to 49C).
CoolF to 120C to 49C).
NOTE:
18
The thermostat has 3 temperature sensor inputs.
Room – The 2 Wire Room sensor input
O/A – Smart outside air sensor
Options
– Adjust this value of the selected sensor by ± 8F (± 4.5C).
Response Speed – Use this value to select how rapidly the thermostat responds to room
temperature changes.
VFAST/Fast/Nor (Normal)//VSLOW
/
SS = Standard HI = High Select LO = Low Select
8
how each compressor performs as part of the overall system. The fourth compressor if
You can set in 1 degree increments how far away this compressor will start from the previous
compressor’s start point.
NOTE:
Options
C
turned to OFF.
NOTE: Compressor one cannot be turned OFF.
19
9
Options
Lead/Lag
IMPORTANT:
Smart Upstaging – Default 5 minutes. The thermostat does more than measure the
Timed Upstage
regardless of how close the room temperature and set temperature are.
10
Options
– Adjust this from OFF to 3, 4 or 5 minutes (Default = 3 Minutes)
Minimum Run Time
20
11
room temperature. When this sensor is open circuited (or permanently short circuited) and
Options
– When the room temperature sensor is absent, the thermostat will shut down.
cooling.
Full Vent
NOTE:
can be set when the high temperature alarm is selected.
– This relay is not used.
– The auxiliary relay will CLOSE when the Thermostat is running the
Compressor 4 – The auxiliary relay is assigned as compressor four. Compressors one through
– In this mode, the auxiliary relay is assigned as auxiliary heat relay, providing
Heat and Cool
or cooling.
Cool – The auxiliary relay will CLOSE whenever the thermostat is calling for cooling.
Heat
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