heat-timer DiGi-SPAN Elite Series Owner's manual

The HWE-Motorized Valve (HWE-MOV) DIGI-SPAN Elite
establishes ambient comfort by varying the temperature of the
heating system’s circulating hot water in response to changes
in the outdoor temperature. In addition, it provides an outdoor
temperature based cutoff, heating system pump control. Two
new features have been added to this control including a
customized reset ratio curve. A Set Point option was added
for applications where outdoor reset will not apply.
Two sensors are used, one to monitor the outdoor temperature,
and one to monitor the circulating hot water temperature
in the heating system. When the outdoor temperature falls
below outdoor cutoff setting, the heating system is activated
and the hot water temperature is increased proportionally to
satisfy the load. Should it get warmer outdoors, the hot water
temperature is automatically lowered by the control. If the
outdoor temperature continues to rise to the outdoor cutoff
setting then the heating system is turned off.
Because of the many different physical characteristics of
buildings, and the type of radiation, i.e., baseboard or radiant,
the heat loss varies. In one building, a 1-degree temperature
change outdoors may require a change of 1 degree in heating
water temperature; for another it may require a change of 2,
3, or even 4 degrees in order to gain the desired comfort level.
This is known as the Reset Ratio. The middle chart shows the
wide range of Reset Ratios available for the HWE-MOV.
The installer ts the HWE-MOV to a specic building by
adjusting the Reset Ratio curve. With curve 4 (2:1 reset ratio)
a 2-degree change in outdoor temperature will change the
circulating hot water temperature by 1 degree; at curve 11
(1:3 reset ratio) an outdoor change of 1 degree will change
the water temperature by 3 degrees. Most buildings with
baseboard radiation require curve 6, 7, or 8. Radiant heat
applications usually require a lower curve. Another, is a
Setback input that will switch the heating system to a lower set
point determined by the Set Back setting.
INSTALLATION AND OPERATION INSTRUCTIONS
HWE-MOV DIGI-El I t E
Hydronic Motorized Valve Control
®
Elite Series
WARNING
This Heat-Timer control is strictly an operating control;
it should never be used as a primary limit or safety
control. All equipment must have its own certified
limit and safety controls required by local codes. The
installer must verify proper operation and correct any
safety problems prior to the installation of this Heat-
Timer control.
Hot Water Control with Outdoor Reset or Set Point
Blue (Valve Close)
White (Valve Open)
Yellow
(System Pump Output)
Red (Valve Common)
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
2 Line Alphanumeric Display
Displays sensor values and
menu settings Output Lights indicate
output status
Display Section Locking Screws
Black (120VAC power)

2
An optional Boiler Return water sensor is provided to avoid thermal shock to the boiler
and, therefore, to help prolong boiler life. If the sensor registers that the boiler return
water is colder than 120°F, the HWE-MOV immediately lowers the temperature of the
circulating heating water to reduce the load on the boiler, allowing the return water
temperature to rise.
Mounting the Controller
• The HWE-MOV DIGI-Elite is designed to mount on a 1900 (4”x4”) deep electrical
box.
• If additional room is needed for wiring use the extension skirt provided in the box.
• Place the HWE-MOV in a convenient location near the unit to be controlled.
• Mount the HWE-MOV indoors and away from excessive
heat or cold.
• Partially unscrew the Display Cover Mounting screws. This
allows for its removal.
• Lifting the Display Section away from the base will unplug it
from the Base section.
• Proceed with the power and output wiring instructions.
• Use the screws provided to mount the HWE-MOV to the
1900 box or the extension skirt.
• Mount Display Section back to the Base Section. Tighten
the Display Cover Mounting Screws.
Wiring
Wiring Power Input
The HWE-MOV is designed to accept ONLY A SINGLE POWER SOURCE. It can be wired
to either 120VAC using the two Black wires or 24VAC using the right most two terminals on
the terminal block on bottom of the control. Heat-Timer recommends the installation of a Surge
Suppressor and a Power Switch before the Power Line connection for safety and ease of service.
120VAC
• Attach line voltage, 120VAC, to the two Black wires extending from the back of the HWE-MOV.
Remember to use the power line from a different source than the equipment being controlled.
24VAC
• Use a dedicated transformer with at least a 5VA output.
• Bring 24VAC to the two right most terminals on the front of the HWE-MOV marked 24VAC and COM.
Wire Colors and Output Lights
• The HWE-MOV has a three S.P.S.T. (single-pole single-throw N.O.) relays. Each output is rated at 1A pilot duty (1/8 HP) or 6 A
resistive at 120VAC 60Hz.
• The HWE-MOV has three lights that follow the output relays operation. When a relay energizes, its LED will turn on.
• The outputs are dry contacts only. They do not source any power.
• The two Yellow wires represent System Output relay and the left LED.
• The Blue wire represents the Valve Close Output relay and the left LED.
• The White wire represents the Valve Open Output relay and the middle LED.
• The Red wire represents Valve Common.
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Display Cover Mounting Screws
Display SectionBase Section
Base Mounting Holes
Input Terminals 24VAC optional power input
N.O.
S.P.S.T. Output Wiring 120VAC Power Wiring
120VAC Power Source
BLACK
BLACK
Boiler
Output Wiring
N.O.
YELLOW
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
24VAC Power Source
24VAC Comm
24VAC Power Wiring
Shield Shield
System Temp
Outdoor Sensor
Sensor Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Enable/Disable
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
{ { { { { {
Temperature Sensor
30°F - 250°F
Temperature Sensor
30°F - 250°F
Temperature Sensor
150°F - 950°F
External Enable/Disable
Shutdown
Pressure, Vacuum, and
4 -20mA
24VAC Power Supply
N.O.
ORANGE
System Pump
Output Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Return Sensor
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Setback/Boost
Wiring
Shield
Return Sensor
N.O.
N.O.
RED
WHITE
BLUE
Floating Motorized Valve
Output Wiring
Floating
Motorized
Valve
OPEN.
COM
CLOSE
N.O.
S.P.S.T. Output Wiring 120VAC Power Wiring
120VAC Power Source
BLACK
BLACK
Boiler
Output Wiring
N.O.
YELLOW
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
24VAC Power Source
24VAC Comm
24VAC Power Wiring
Shield Shield
System Temp
Outdoor Sensor
Sensor Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Enable/Disable
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
{ { { { { {
Temperature Sensor
30°F - 250°F
Temperature Sensor
30°F - 250°F
Temperature Sensor
150°F - 950°F
External Enable/Disable
Shutdown
Pressure, Vacuum, and
4 -20mA
24VAC Power Supply
N.O.
ORANGE
System Pump
Output Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Return Sensor
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Setback/Boost
Wiring
Shield
Return Sensor
N.O.
N.O.
RED
WHITE
BLUE
Floating Motorized Valve
Output Wiring
Floating
Motorized
Valve
OPEN.
COM
CLOSE
Type of Radiation in Building Reset Ratio Offset
Radiators (Steel & Cast Iron) 1.00 (OD) : 1.00 (SYS) 0˚F
Baseboard (Finned copper tube& Cast Iron) 1.00 (OD) : 1.00 (SYS) 0˚F
Radiant (High Mass/Concrete) 4.00 (OD) : 1.00 (SYS) -10˚F
Radiant (Low Mass/Joists) 2.00 (OD) : 1.00 (SYS) -10˚F
Fan Coils & Air Handlers 1.00 (OD) : 1.00 (SYS) 20˚F
Outdoor Temperature (in °F)
70 60 50 40 2030 0 -1010 -20
120
140
130
150
160
170
180
200
190
210
220
100
110
12 11 10 9
8
7
6
4
3
2
5
1
1:4 1:3 1:2 1:1.5
1:1.25
1:1
1.25:1
1.5:1
2:1
3:1
4:1
8:1
Water Temperature (in °F)
Reset Ratio Curves
Reset Ratios are presented as
Outdoor : Water

3HWE-MOV Digi-Elite Operation Manual
Wiring the System Output to a Pump
• The HWE-MOV will control the System Pump up to a maximum output of 1 Amp inductive or 1/8 HP.
• Wire the two Yellow wires to the System Pump circuit.
• The HWE-MOV Elite does not source any output power to the pump. The relay makes when
energized to switch the power to the pump.
Wiring Motorized Valve
• The output relays are dry-contacts only. They do not source any power.
• The Red wire is Common. If the valve has only three wires, it is necessary to wire in a
power source for the valve. One side of the valve power source is connected to the valve
Common, and the other side is connected to the HWE-MOV Red wire Common. Check
wiring instructions for the specic valve before making any connections.
• The White wire connects to the valve Open terminal.
• The Blue wire connects to the valve Close terminal.
Wiring Input Terminals
Heating System Sensor (HSS) Installation (T1, COM)
• Place the Heating System sensor in the common header where it will register the output of the
boiler before any takeoffs.
• Only use the Standard Brass Tube sensor (HT #904250-00) provided.
• The sensor wires can be extended up to 500' using a shielded 2-conductor cable (Belden
#8760 or equivalent (#18/2)). Do not connect the shield at the sensor but at the control using
the COM terminal.
• Do not run sensor wires in conduit with line voltage wiring.
IMMERSION Heating System Sensor (HSS) Installation
• Install a 3/8"ID 1/2"NPT immersion well (HT #350147-00 or equivalent).
• Insert the supplied sensor probe into the well.
Strap-On Heating System Sensor (HSS) Installation
• Strap the sensor to the pipe using metal clamps. Do not over tighten the
clamp.
• Strap pipe insulation around the sensor and the pipe.
Outdoor Sensor Installation (T2, COM)
• The Outdoor Sensor must be used when Outdoor Reset is selected from the Startup menu. However, in Set Point
mode, the Outdoor Sensor is optional. When connected in that mode, it will be used as an outdoor cutoff sensor only.
• Only use the Heat-Timer sensor included with the unit.
• Place the sensor in the shade on the north side of the building.
• Be sure the location is away from doors, windows, exhaust fans, vents, or other heat sources.
• The sensor should be mounted approximately 10' feet above ground level.
• Mount the sensor clip base to the outside of the building. Insert the sensor in the middle and snap close the clip on the
sensor.
• The sensor wires can be extended up to 500' using shielded 2-conductor cable. Do not
ground the shield at the sensor but at the control using the COM terminal.
• Do not run sensor wires in conduit with line voltage wiring.
OPTIONAL - Boiler Return Sensor Installation (T3+, T3-)
• The Boiler Return Sensor is designed to be installed in a 3/8” ID well.
• If sensor is installed as a Strap-On, good contact is required for proper operation. Also,
insulating the sensor with the pipe will ensure sensor will have a more accurate reading.
• Place the sensor in the boiler return piping. The sensor should be located where it will
register the correct return from all loops to boiler
• The sensor wires can be extended up to 500’ by splicing with 18 gauge shielded wire.
• The sensor has no polarity. Connect either sensor wire to the front terminal marked T3+,
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
System Sensors {
Enable/Disbale Input
Dry-Contact {
{
Outdoor Sensor {
24VAC power Input {
Return Sensor (Optional)
Setback Input Dry-Contact {
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Motorized
Valve 4-20mA
Common (Red)
4-20mA (White)
Not Used (Blue)
+-
-
+
30-36VDC
Excitation
Voltage
120 VAC
System Pump
Power (Black)
(Yellow) 120 VAC
MCA Modulating a 4-20mA Actuator
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Motorized
Valve (Voltage)
Common (Red)
Voltage (Blue)
Not Used (White)
-
+
120 VAC
System Pump
Power (Black)
(Yellow) 120 VAC
MCA Modulating a Voltage Actuator
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Common (Red)
4-20mA (White)
Not Used (Blue)
30-36VDC
Excitation
Voltage Modulating
Boiler 4-20mA
-+
120 VAC
System Pump
Power (Black)
(Yellow) 120 VAC
MCA Modulating a 4-20mA Boiler
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Common (Red)
Voltage (Blue)
Not Used (White) Modulating
Boiler (Voltage)
-+
120 VAC
System Pump
Power (Black)
(Yellow) 120 VAC
MCA Modulating a Voltage Boiler
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
120 VAC
Boiler Activation
Power (Black)
(Yellow)
Common (Red)
Close (Blue)
Open (White)
Modulating
Boiler (135Ω)
MCP Modulating a 135Ω Boiler
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
120 VAC
System Pump
Motorized
Valve (Floating)
Power (Black)
(Yellow)
Common (Red)
Close (Blue)
Open (White)
Close
Open
Comm
24VAC
Transformer
120VAC
120 VAC
MCF Modulating a Floating Actuator
CLOSE SYSTEMOPEN
+-
System Sensor
In Well
Shield
Not connected
Well Locknut
Sensor in Well
Well
Sensor 2-Conductor
Shielded Cable
System
Strap-On
Sensor
Shield
Not connected
Plastic
Tie-Wraps
Around Pipe
Outdoor
Sensor
snap-in
location
Shield
not connected
Conduit
Outdoor Label
on back of Sensor
Outdoor Sensor
Strap-On Sensor
Immersion Sensor
Mounting
screws
location
Seal around
sensor and wall
Outdoor
drip-hole
Cut the Green,
White, and Clear
Tube
Connect
to 1/4" pigtail
BLACK
RED
Transducer
4-20mA
T1 T2
COM COM
T3+
T3-
EXT+
EXT-
P+
P-
COM
24VAC
T1 T2
COM COM
T3+
T3-
EXT+
EXT-
P+
P-
COM
24VAC
Enable/Disable Dry Contact
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Outdoor Sensor Optional
System Temperature Sensor
DECREASE SYSTEMINCREASE
MC Temperature
Set Point
T1 T2
COM COM
T3+
T3-
EXT+
EXT-
P+
P-
COM
24VAC
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Outdoor Sensor
System Temperature Sensor
DECREASE SYSTEMINCREASE
MC Temperature
Outdoor Reset
T1 T2
COM COM
T3+
T3-
EXT+
EXT-
P+
P-
COM
24VAC
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Outdoor Sensor Optional
DECREASE SYSTEMINCREASE
MC Pressure
Set Point
Setback Dry Contact
Enable/Disable Dry Contact
Setback Dry Contact
Pressure Transducer
Enable/Disable Dry Contact
Setback Dry Contact
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Motorized
Valve 4-20mA
Common (Red)
4-20mA (White)
Not Used (Blue)
+-
-
+
30-36VDC
Excitation
Voltage
120 VAC
System Pump
Power (Black)
(Yellow) 120 VAC
MCA Modulating a 4-20mA Actuator
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Motorized
Valve (Voltage)
Common (Red)
Voltage (Blue)
Not Used (White)
-
+
120 VAC
System Pump
Power (Black)
(Yellow) 120 VAC
MCA Modulating a Voltage Actuator
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Common (Red)
4-20mA (White)
Not Used (Blue)
30-36VDC
Excitation
Voltage Modulating
Boiler 4-20mA
-+
120 VAC
System Pump
Power (Black)
(Yellow) 120 VAC
MCA Modulating a 4-20mA Boiler
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Common (Red)
Voltage (Blue)
Not Used (White) Modulating
Boiler (Voltage)
-+
120 VAC
System Pump
Power (Black)
(Yellow) 120 VAC
MCA Modulating a Voltage Boiler
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
120 VAC
Boiler Activation
Power (Black)
(Yellow)
Common (Red)
Close (Blue)
Open (White)
Modulating
Boiler (135Ω)
MCP Modulating a 135Ω Boiler
DECREASE SYSTEMINCREASE
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
120 VAC
System Pump
Motorized
Valve (Floating)
Power (Black)
(Yellow)
Common (Red)
Close (Blue)
Open (White)
Close
Open
Comm
24VAC
Transformer
120VAC
120 VAC
MCF Modulating a Floating Actuator
CLOSE SYSTEMOPEN
+-
ALERT
Determining the proper location for
the Outdoor Sensor is very important.
The HWE-MOV will base the heat on
the outdoor temperature information
it receives from this location. If the
sensor is in the sun, or covered with
ice, its reading will be different from the
actual Outdoor temperature.

4
T3-. Connect the other sensor wire and the shield to the front terminal marked T3-.
• Do not run sensor wires in conduit with line voltage wiring.
Wiring the Enable/Disable (EXT+, EXT-)
• The EXT terminals can be used to enable or disable the system by connecting it to a thermostat, external control,
or a switch. It accepts dry contact input only.
• If no thermostat or control is connected to the EXT terminals, leave the jumper supplied as a contact to the
terminals.
• The HWE-MOV will close the valve unless the EXT terminals are closed/shorted.
Wiring the Setback/Boost (P+, P-)
• The Setback feature can be used to provide the HWE-MOV with a lower temperature Set Point when less heat
is required.
• A typical use for Setback is to provide less system temperature to a building during the night or on the
weekends when building is not occupied, but heat is still required.
• The Setback is activated by closing/shorting the P+ and P- terminals using an external timer.
Button and Navigating Menus
The HWE-MOV has three buttons.
• The SET button function varies. When the Default Screen is displayed, pressing the SET Button views the
MENU. When in the Menus and settings, the SET Button accepts the selected entry or setting value.
• When in the menus, pressing the Up and Down buttons will scroll through the menu options. They can be used
to change the setting of a specic function. i.e., change the Set Point, Differential, or System Trim. In addition,
when in the default screen, the Up and Down buttons will display the outdoor temperature and Outdoor Cutoff
when no return sensor is available, or the outdoor temperature and the return temperature when an active return
sensor is connected.
• At the end of every operation menu there is a <Back> option that allows the user to go back one menu level. If
the SET Button was held down for three seconds on the <Back> option, the display will go back to the default
screen.
Startup Options
When the control is initiated for the rst time or after a manual reset, it will start
its operation with the Startup Menu. Later, the Startup menu can be accessed as
an option from the operation menu. An option must be accepted in each screen in the Startup Menu to move to the next level.
Display Unit
Options: ºF, ºCDefault: ºF
SET
SET
SET
SET
SET
SET
/<System Startup>/Display Unit
• The HWE-MOV will offer two different temperature displays. If ºF is selected, all temperatures
will display in Fahrenheit. If ºC is selected, all temperatures will display in Celsius.
DISPLAY UNIT:
F
C
CONTROL MODE:
Outdoor Reset
Set Point
Control Mode
Options: Outdoor Reset, Set Point Default: Outdoor Reset
SET
SET
SET
SET
SET
SET
/<System Startup>/Display Unit/Control Mode
• The new HWE-MOV have two heating logics. Outdoor Reset; varies the system set point/target based on outdoor temperature.
This selection will add several menu options, Reset Ratio, Offset, Min Water temp, Max Water temp, and Outdoor Cutoff, to allow
of adjustment and ne tuning of the Reset Curve. In addition, a customized curve will be available for specialized applications.
• Set Point; Gives the installer the exibility of selecting a xed set point. The Outdoor Cutoff will be available if an outdoor sensor
was installed.
Sensor Fault
Options: Output On, Output Off Default: Output On
SET
SET
SET
SET
SET
SET
/<System Startup>/..../Sensor Fault
SENSOR FAULT:
Output On
Output Off
• The Sensor Fault will determine the operating status of the output relays when a sensor reads Short or Open. On sensor fault the
Set Point will indicate FAULT TGT=ON or OFF to indicate the condition of the output and the faulty sensor will read OPEN or
SHORT to indicate the condition of the sensor.
SET
SET
SET
SET
SET
SET
N.O.
S.P.S.T. Output Wiring 120VAC Power Wiring
120VAC Power Source
BLACK
BLACK
Boiler
Output Wiring
N.O.
YELLOW
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
24VAC Power Source
24VAC Comm
24VAC Power Wiring
Shield Shield
System Temp
Outdoor Sensor
Sensor Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Enable/Disable
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
{ { { { { {
Temperature Sensor
30°F - 250°F
Temperature Sensor
30°F - 250°F
Temperature Sensor
150°F - 950°F
External Enable/Disable
Shutdown
Pressure, Vacuum, and
4 -20mA
24VAC Power Supply
N.O.
ORANGE
System Pump
Output Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Return Sensor
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Setback/Boost
Wiring
Shield
Return Sensor
N.O.
N.O.
RED
WHITE
BLUE
Floating Motorized Valve
Output Wiring
Floating
Motorized
Valve
OPEN.
COM
CLOSE
N.O.
S.P.S.T. Output Wiring 120VAC Power Wiring
120VAC Power Source
BLACK
BLACK
Boiler
Output Wiring
N.O.
YELLOW
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
24VAC Power Source
24VAC Comm
24VAC Power Wiring
Shield Shield
System Temp
Outdoor Sensor
Sensor Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Enable/Disable
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
{ { { { { {
Temperature Sensor
30°F - 250°F
Temperature Sensor
30°F - 250°F
Temperature Sensor
150°F - 950°F
External Enable/Disable
Shutdown
Pressure, Vacuum, and
4 -20mA
24VAC Power Supply
N.O.
ORANGE
System Pump
Output Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Return Sensor
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Setback/Boost
Wiring
Shield
Return Sensor
N.O.
N.O.
RED
WHITE
BLUE
Floating Motorized Valve
Output Wiring
Floating
Motorized
Valve
OPEN.
COM
CLOSE
N.O.
S.P.S.T. Output Wiring 120VAC Power Wiring
120VAC Power Source
BLACK
BLACK
Boiler
Output Wiring
N.O.
YELLOW
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
24VAC Power Source
24VAC Comm
24VAC Power Wiring
Shield Shield
System Temp
Outdoor Sensor
Sensor Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Enable/Disable
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
{ { { { { {
Temperature Sensor
30°F - 250°F
Temperature Sensor
30°F - 250°F
Temperature Sensor
150°F - 950°F
External Enable/Disable
Shutdown
Pressure, Vacuum, and
4 -20mA
24VAC Power Supply
N.O.
ORANGE
System Pump
Output Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Return Sensor
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Setback/Boost
Wiring
Shield
Return Sensor
N.O.
N.O.
RED
WHITE
BLUE
Floating Motorized Valve
Output Wiring
Floating
Motorized
Valve
OPEN.
COM
CLOSE

5HWE-MOV Digi-Elite Operation Manual
HEAT-TIMER CORP.
V1.00 c 2006
DIGI-SPAN ELITE
HWE-MOV
Loading Default
Values...
DISPLAY UNIT:
F
C
SENSOR FAULT:
Output On
Output Off
SETUP COMPLETE!
PRESS SET
Startup Menu
SYSTEM= 68 F
TARGET= 150 F
------MAIN------
Set Point 150 F
<Out. Reset>
<Settings>
<Maintenance>
<Sys. Startup>
<Info>
<Back>
Set Point:
70 F
----SETTINGS----
Run-On 2m
Setback 20 F
<Back>
System Trim:
+0 F
SYSTEM STARTUP
No
Yes
HWE-MOV V1.00
Setpoint F
FAULT: Output On
Operating Menu
Default Screen
Menus
SET
SET
SET
SET
SET
SET
Set SYS Temp 1:
100 F
CONTROL MODE:
Outdoor Reset
Set Point
-OUTDOOR RESET--
Reset Ratio 7
Offset +0 F
Cutoff 60 F
Min Tgt. 120 F
Max Tgt. 200 F
<Back>
Cutoff:
60 F
Reset Ratio O/S:
Custom
1(8.00/1.00)
2(4.00/1.00)
3(3.00/1.00)
4(2.00/1.00)
5(1.50/1.00)
6(1.25/1.00)
7(1.00/1.00)
8(1.00/1.25)
9(1.00/1.50)
10(1.00/2.00)
11(1.00/3.00)
12(1.00/4.00)
At OD Temp 1:
70 F
Set SYS Temp 2:
170 F
At OD Temp 2:
0 F
---MAINTENANCE---
Sys. Trim +0 F
Out. Trim +0 F
Ret. Trim +0 F
Valve
<Back>
Offset:
+0 F
Min Target:
120 F
Max Target:
200 F
Outdoor Trim:
+0 F
Pump Run-On:
2m
Setback:
20 F
Boost:
No
Yes
Set Point
Reset
Outdoor Trim:
+0 F
Valve Mode:
Auto
Close
Open

6
Outdoor Reset Mode
• When Output-On is selected, the HWE-MOV will energize the motorized valve open relay and system relay when System reads
Short or Open and Outdoor is below Outdoor Cutoff. However, if the Outdoor sensor fails and the Outdoor reads Short or Open, the
HWE-MOV will change the Target Set Point to the Max Water Temperature.
• When Output-Off is selected, the HWE-MOV will energize the motorized valve close relay when the System sensor reads Short or
Open. However, when the Outdoor sensor fails, reads short or open, the HWE-MOV will change the Target Set Point to be the Min
Water Temperature.
Set Point Mode
• Output On, the HWE-MOV will energize the motorized valve Open relay when the System sensor reads Short or Open.
• Output-Off, the HWE-MOV will energize the motorized valve Close relay when the System sensor reads Short or Open.
• The Outdoor Sensor Short or Open status will not affect the control operation in Set Point mode.
Setting the Control to Factory Default
To Reset the HWE-MOV control to its original factory defaults, power down the control. Hold down
the SET and DOWN buttons while powering the control back up until the Loading Default Values
screen appears. The Display will direct you to the Startup menu after the defaults are loaded to
program the control.
SET
SET
SET
SET
SET
SET
Loading Default
Values...
NOTE: When resetting the control to original factory defaults all control settings will be over written and will no longer exist.
Default Display
The default display will show the current System temperature and the Target temperature. In addition,
by clicking the Up or Down button, the display will show the current Outdoor temperature and the
current Return temperature, only if the return sensor is connected to terminals T3+ and T3-. However,
if no return sensor is connected, the control will display the current Outdoor temperature and the
Outdoor Cutoff.
Operating Menu Options
Set Point
(Available when Startup Control Mode = Set Point)
SYSTEM= 148 F
TARGET= 150 F
SET
SET
SET
SET
SET
SET
SET
SET
SET
SET
SET
SET
Outdoor= 48 F
Return= 125 F
Outdoor= 48 F
Cutoff= 65 F
Options: From -10ºF/-23ºC to 230ºF/110ºC Default: 70ºF/21ºC
SET
SET
SET
SET
SET
SET
/Set Point
• The Set Point option provides the user with an adjustable xed Target temperature to control the
system. If an Outdoor Sensor was connected, the next menu option will show Outdoor Cutoff,
otherwise there will be no Outdoor Cutoff option.
Set Point:
70 F 140 F
SYSTEM= 148 F
TARGET= 150 F
Outdoor Reset
(Available when Startup Control Mode = Outdoor Reset)
Options: From 1(8.00º/1.00º) to 12(1.00º/4.00º), Custom Default: 7(1.00º/1.00º)
SET
SET
SET
SET
SET
SET
/<Out. Reset>/Reset Ratio
• The Reset Ratio determines how the System water temperature will vary with Outside temperature
(OD). With any of the ratios, the colder it becomes outside, the hotter the temperature of the system
water. The Ratio is measured as; Outdoor : System Water temperature.
• With a 1.00:4.00 ratio, the System water temperature will increase rapidly as the outside
temperature falls, hitting the maximum water temperature of 240°F at 24°F outdoor temperature.
With a 4.00 (OD):1.00 (SYS) ratio, the System water temperature (SYS) will increase slowly as the
outside temperature falls.
• The Reset Ratio controls the amount of heat that enters the heating system based on the outdoor
temperature. A higher numbered Reset Ratio will result in a higher Calculated water temperature.
See the Reset Ratio chart on the second page. If the application has radiant heat, a lower
Reset Ratio O/S:
Custom
1(8.00/1.00)
2(4.00/1.00)
3(3.00/1.00)
4(2.00/1.00)
5(1.50/1.00)
6(1.25/1.00)
7(1.00/1.00)
8(1.00/1.25)
9(1.00/1.50)
10(1.00/2.00)
11(1.00/3.00)
12(1.00/4.00)

7HWE-MOV Digi-Elite Operation Manual
numbered Reset Ratio curve should be selected.
• If required: Adjust the RESET RATIO in cold weather. If the ambient building temperatures are too cold in cold weather, move
the ratio to a higher selection. That is, if 1.00 (OD):1.00 (SYS) was initially selected, change the selection to 1.00 (OD):1.25 (SYS).
If the building temperatures are too warm in cold weather, move the ratio to a lower selection. That is, if 1.00 (OD):1.00 (SYS) was
initially selected, change the selection to 1.25 (OD):1.00 (SYS).
• The Custom option gives the user the capability of creating a specialized Reset Ratio curve. Setting two points on the Reset Ratio
chart generates the customized curve. Each point requires a System Water Temperature and an Outdoor Temperature. The line
connecting the two points will be the customized reset ratio.
• Reset Ratios are adjustable based on the building and application. See suggested ratios on page 2.
Set SYS Temp 1:
100 F
At OD Temp 1:
70 F
Outdoor Temperature (in °F)
70 60 50 40 2030 0 -1010 -20
120
140
130
150
160
170
180
100
110
Water Temperature (in °F)
Custom Reset Ratio
Point1: System=120°F
Oudoor=60°F
Point2: System=170°F
Oudoor=0°F
Point1
Point2
Customized Reset Ratio
Max Target
Min Target
Outdoor Temperature (in °F)
70 60 50 40 2030 0 -1010 -20
120
140
130
150
160
170
180
100
110
Water Temperature (in °F)
Target Offset
Offset=10°F
Reset Ratio=1.5 : 1.0
Reset Ratio
Max Target
Min Target
Reset Ratio + 10F Offset
Min Target=120°F
Max Target=170°F
Custom Outdoor Reset Curve
(Available when Startup Control Mode = Outdoor Reset)
Options: Sys Temp 1, 2 (-10ºF/21ºC) to (210ºF/99ºC) Default: 1(100ºF/38ºC), 2(171ºF/77ºC)
Options: Outdoor Temp 1, 2 (-10ºF/-23ºC) to (100ºF/38ºC) Default: 1(70ºF/21ºC), 2(0ºF/-18ºC)
SET
SET
SET
SET
SET
SET
/<Out. Reset>/Reset Ratio/Custom
• For situations where the provided reset ratios do not provide the perfect building heat-loss
equilibrium, the customized option can be used.
• The Custom Reset Ratio is only available when Custom is selected from the Reset Ratio menu
option. It provides the user with the capability of assigning two points on the reset ratio diagram
and use the line that connects those two points as the customized reset ratio curve. Each of the two
points will need a specic System and Outdoor Temperature to identify it on the diagram.
• To Set the rst point, specify Sys Temp 1, and OD Temp 1. Then, specify Sys Temp 2, and OD
Temp 2, to set the second point on the curve. The two points can be any where on the line, not
necessarily at the ends.
• The chart shows an example of a customized curve 6(OD):5(SYS) that do not exist in the standard
curve options. If the outdoor temperature reaches 30ºF, the system target will be 145ºF.
• Remember that the Min Target and Max Target apply to all reset ratios including the customized
reset ratio ones.
Offset
(Available when Startup Control Mode = Outdoor Reset)
Options: From -40ºF/-22ºC to +40ºF/+22ºC Default: 0ºF/0ºC
SET
SET
SET
SET
SET
SET
/<Out. Reset>/Offset
Offset:
+0 F
• The Offset setting lets you adjust the starting points of the Reset Ratio curves. This means that, regardless of the Outdoor
temperature (OD), or the Reset Ratio that has been selected, when the Offset setting is changed, that change is directly added to or
subtracted from the calculated temperature/Target. For example, if the Set Point temperature was 130°F and the Offset was changed
from 0° to +10°, then the Set Point temperature would increase to 140°F
• If required: Adjust the Water Offset in mild weather. If the ambient building temperatures are too warm in the mild weather,
decrease the Offset. If the ambient building temperatures are too cold in the mild weather, increase the Offset. The rule of thumb
for baseboard radiation is to change the Offset 4°F for every 1°F you wish to change the building temperatures. In radiant heat
applications, change the Offset 1°F or 2°F for every 1°F you wish to change the building temperature.
Outdoor Cutoff
Options: Off, 20ºF/0ºC to 100ºF/25ºC, On Default: 65ºF
SET
SET
SET
SET
SET
SET
/Set Point/Cutoff in Set Point
SET
SET
SET
SET
SET
SET
/Set Point/<Out. Reset>/Cutoff in Reset
• In Set Point, if the outdoor sensor is installed, the Outdoor Cutoff setting screen will automatically
appear after the temperature Set Point has been selected.
Cutoff:
60 F
• The Outdoor and its Cutoff temperatures can be viewed from the default screen by clicking the Up or Down buttons.
• When the outdoor temperature falls to the adjustable Outdoor Cutoff temperature, the HWE-MOV will control the System Pump
and Motorized valve relays to provide heat.
• When the outdoor temperature rises to the Outdoor Cutoff plus a 2°F differential, the HWE-MOV will energize the Motorized Valve
Close relay for 6 minutes to guarantee valve closure. The System relay will remain energized for the Run-On delay.
• The Outdoor Cutoff can be set from 20°F to 100°F. In addition, the Setting can be set to ON or OFF. If ON is selected, the System
Relay will energize regardless of the Outdoor temperature and the HWE-MOV will the control the motorized valve to hold the
target temperature. If OFF is selected, the System and Open relays will always be off.

8
Minimum Target
(Available when Startup Control Mode = Outdoor Reset)
Options: From 70ºF/21ºC to 180ºF/77ºC Default: 70ºF/27ºC
SET
SET
SET
SET
SET
SET
/Set Point/<Out. Reset>/Min. Tgt
Min Target:
120 F
• The Minimum Target Temperature must be set to the system design specication. The HWE-MOV will calculate the Target based
on the Outdoor temperature (OD), the Reset Ratio, and the Offset value. The HWE-MOV will control the motorized valve to hold
either the calculated temperature or the Minimum Target Temperature whichever is higher.
• The Minimum Target Temperature must be at least 20°F lower than the Maximum Temperature (See next setting).
Maximum Target
(Available when Startup Control Mode = Outdoor Reset)
Options: From 90ºF/38ºC to 240ºF/116ºC Default: 240ºF/116ºC
SET
SET
SET
SET
SET
SET
/Set Point/<Out. Reset>/Max. Tgt
Max Target:
200 F
• This is the highest temperature heating water the HWE-MOV will circulate through the heating system.
• When using a radiation system, it should be set according to the tubing or oor manufacturer’s specication.
• The Maximum Temperature must be at least 20°F higher than the Minimum Temperature.
Run-On
Options: From 0 min to 60 min Default: 2 min
SET
SET
SET
SET
SET
SET
/Settings>/Run On
Pump Run-On:
2m
• The SYS relay will energize whenever the Outdoor temperature is below the Outdoor Cutoff. When the Outdoor temperature
increases 2°F above the Outdoor Cutoff, the SYS relay will stay on for a period set by the System Run-On. This allows the Pump
to dissipate the residual heat within the system back into the building.
• The System Run-On time should be set based on the size and type of the piping and pumps.
Setback
Options: From 0ºF/0ºC to 80ºF/44ºC Default: 11ºF/6ºC
SET
SET
SET
SET
SET
SET
/Settings>/Setback.
• The Setback feature can be used to provide the HWE-MOV with a lower temperature Set Point
when less load is required.
• The lower Set Point will appear on the main display indicating SBC TGT= .
• For example; when the calculated temperature is 160°F and the Setback is set to 20°F, a setback
call will change the Set Point to (160v - 20°F) 140°F.
Setback:
20 F
SYSTEM= 68 F
SBC TGT= 140 F
• A typical use for Setback is to provide less system temperature to a building during the night or on the weekends when building is
not occupied, but heat is still required.
• The Setback is activated by closing/shorting the P+ and P- terminals using an external timer.
Boost
Options: Yes, No Default: No
SET
SET
SET
SET
SET
SET
/Settings>/Setback/Boost.
• The morning Boost is designed to return the building to comfortable ambient temperatures after
the Night (Setback) period. The HWE-MOV will accomplish this by running elevated water
temperatures (will add Setback setting to calculated water temperature) for 30 minutes after
the opening of the setback terminals P+ and P-. That is, if the normal set point at a specic
outdoor was 145˚F and the Setback setting was 20˚F, the boost will raise the system calculated
temperature to 165˚F for 30 minutes after the setback.
Boost:
No
Yes
System, Outdoor, and Boiler Return Trim
Options: From -20Fº/-11Cº to +20Fº/+11Cº Default: 11Fº/6Cº
SET
SET
SET
SET
SET
SET
/<Maintenance>/Sys. Trm, Out. Trim, or Ret. Trim
• The Heat-Timer sensors are very accurate. However, sometime it might be benecial to adjust
the values to match and existing system. The System and Outdoor Trim values adjust the System
Sensor and Outdoor Sensor readings using positive or negative values.
System Trim:
+0 F
Outdoor Trim:
+0 F
Return Trim:
+0 F

9HWE-MOV Digi-Elite Operation Manual
Valve Mode
Options: Auto, Close, Open Default: Auto
SET
SET
SET
SET
SET
SET
/<Maintenance>/Valve
•
The Auto option allows the HWE-MOV to modulate and pulse the valve open or close to achieve
a specic target temperature.
•
The Close option will energize the Close relay constantly. This is useful in cases of equipment
repairs and testing.
•
The Open option will energize the Open relay constantly. This is useful in cases of equipment
repairs and testing.
Valve Mode:
Auto
Close
Open
SYSTEM= 55 F
MANUAL CLOSE
SYSTEM= 55 F
MANUAL OPEN
Enable/Disable Input
•
The HWE-MOV will provide heat only if the EXT- and EXT+ terminals are shorted. If no
external equipment or switch is connected to these terminals, leave the factory installed jumper.
•
When the terminals are OPEN, the Target will display TSTAT OPEN.
•
Even if the EXT terminals are open, a call for DHW will energize the output relays based on the
DHW Priority configuration.
•
The Enable /Disable terminals can be used as a Summer/Winter switch when connected to an
external switch.
N.O.
S.P.S.T. Output Wiring 120VAC Power Wiring
120VAC Power Source
BLACK
BLACK
Boiler
Output Wiring
N.O.
YELLOW
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
24VAC Power Source
24VAC Comm
24VAC Power Wiring
Shield Shield
System Temp
Outdoor Sensor
Sensor Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Enable/Disable
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
{ { { { { {
Temperature Sensor
30°F - 250°F
Temperature Sensor
30°F - 250°F
Temperature Sensor
150°F - 950°F
External Enable/Disable
Shutdown
Pressure, Vacuum, and
4 -20mA
24VAC Power Supply
N.O.
ORANGE
System Pump
Output Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Return Sensor
Wiring
T1 T2 T3+ COM COM T3- EXT+ EXT- P+ P- COM 24VAC
Setback/Boost
Wiring
Shield
Return Sensor
N.O.
N.O.
RED
WHITE
BLUE
Floating Motorized Valve
Output Wiring
Floating
Motorized
Valve
OPEN.
COM
CLOSE
NOTE: On a sensor fault while the Enable/Disable terminals are open, the control will follow the
Enable /Disable state regardless of the sensor fault condition. SYSTEM= 55 F
TSTAT OPEN
SYSTEM= SHORT
TSTAT OPEN

10
Troubleshoot
No Display or LED Lights
Check the power to the HWE-MOV. The HWE-MOV requires 120VAC power to the Black wires or 24VAC to the right most
terminals. Turn the power off and back on to restore the display. If unsuccessful, make sure the Display Cover of the control is
securely mounted to the Base.
System or Outdoor Reads OPEN or SHORT
If Open, short the sensor input terminals. The display should read SHORT. If it doesn’t, the HWE-MOV may be damaged.
If Short, remove the wires from the input terminals. The display should read OPEN. If it doesn’t, the HWE-MOV may be
damaged.
System or Outdoor Reads an Incorrect Temperature
Remove the wires from the input terminals. The display should change to read OPEN. If it doesn’t, the HWE-MOV may be
damaged. Take an ohm reading across the detached sensor wires. The ohm reading should correspond to the Temperature Sensor
Chart. If the difference is within 5°F adjust the Trim for the sensor Otherwise, the sensor may be damaged.
No Heat - All LEDs are OFF
Check the outdoor temperature and Outdoor Cutoff readings. If the outdoor temperature is above the Outdoor Cutoff, the HWE-
MOV will not give heat. If the display shows TSTAT OPEN then, check the EXT± terminals. If the EXT± terminals are not
jumped together, the HWE-MOV will not give heat. Finally, if the display shows MANUAL CLOSE then, the Valve Mode has
been set to Close. Change Valve Mode to AUTO.
No Heat - System Pump LED ON - Pump Not Running
Remove any connections to the Yellow wires for the Heating System Pump. Test for continuity across the pair of Yellow wires. If
the wires are continuous, the HWE-MOV is calling for the Heating System Pump to run. and the problem is not with the HWE-
MOV. Check the power source and the pump to determine why it is not circulating.
No Heat - System Pump LED ON - Pump Running
Check that the boiler (or other hot water source) is providing hot water to the inlet of the motorized valve. If hot water is available,
check that System temperature reading is lower than the Target. If it is, then, remove all wiring to the motorized valve and check for
continuity across the MOV’s Red and White wires when the Middle LED is ON. If the continuity exists, the HWE-MOV is working
properly, check the valve and motor.
Too Little Heat
First check that the Outdoor sensor reads a temperature not Short
or Open. If it does and Sensor Fault has been set to Output Off, the
HWE-MOV will try to maintain the Minimum Target temperature.
Follow the System or Outdoor Reads Open or Short section. Repair
or replace the faulty sensor. Otherwise, if all sensor readings are
accurate, check if the Target temperature is the same as the Maximum
Target. If so, check the Maximum Target has not been set too low
for the system (DO NOT increase the Maximum Target without
consulting the installer or tubing/ooring manufacturer). Finally,
adjust the Reset Ratio or Offset to increase the temperature of the
circulating hot water. Note that, depending on the type of radiation, it
may take several hours before the ambient temperature increases.
Too Much Heat
Check if the Outdoor or System sensor is not reading SHORT or
OPEN. Follow the System or Outdoor Reads Open or Short section.
If Sensor Fault was set to Output ON, the HWE-MOV will provide
excess heat to the building. Repair or replace the faulty sensor.
Otherwise, if all sensor readings are accurate, adjust the Reset Ratio or
Offset to decrease the temperature of the circulating hot water.
Temperature Sensor Chart
TEMPERATURE
(in Degrees °F)
Value
(in Ohms)
-30 117720
-20 82823
-10 59076
0 42683
10 31215
20 23089
25 19939
30 17264
35 14985
40 13040
45 11374
50 9944
55 8714
60 7653
70 5941
80 4649
90 3667
TEMPERATURE
(in Degrees °F)
Value
(in Ohms)
100 2914
110 2332
120 1879
130 1524
140 1243
150 1021
160 842
170 699
180 583
190 489
200 412
210 349
220 297
230 253
240 217
250 187

11 HWE-MOV Digi-Elite Operation Manual
Boiler
Building
Heat
System
Pump
System
Sensor
Outdoor
Sensor
T1 T2
COM COM
T3+
T3-
EXT+
EXT-
P+
P-
COM
24VAC
}System Sensor }Outdoor Sensor }Return Sensor }Enable Dry Contact }Setback Dry Contact
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
Yellow Wires
Motorized
Valve
Red, White, Blue Wires
SystemOpenClose
Return
Sensor
T1 T2
COM COM
T3+
T3-
EXT+
EXT-
P+
P-
COM
24VAC
System Sensor
Outdoor Sensor
Enable Dry Contact
Setback Timer
Boiler SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM = 147F
TARGET = 150F
120 VAC
System Pump (Yellow)
Motorized
Valve
Power (Black)
Return Sensor
Open (White) Common (Red) Close (Blue)
SystemOpenClose
120 VAC
L
N
120VAC
Load
Com
HWE-MOV Plumbing and Wiring Diagrams
Mechanical
Electrical
NOTE: The diagrams are conceptual only.
Heat-Timer is aware that each installation
is unique, however, the diagrams in
this document are to represent control
operation concept. It is the installer
responsibility to comply with local codes
and to install safety controls.

12
C O R P O R A T I O N
R
20 New Dutch Lane, Faireld, NJ 07004 973-575-4004 • Fax [phone] • http://www.heat-timer.com
HT #059060-00 B
Specications
Voltage Input: 120 VAC 60 Hz(2 Black wires) /24VAC 60 Hz (24VAc terminals) (Only One Power Source)
Power Consumption: 3 VA Max
Operating Temperature: 20°F to 120°F
Operating Humidity: 20% to 80%
Dimensions: 4"W x 4"H x 2½"
Weight: 1 pound
Display: Back Lite 2 Line Alphanumeric LCD Display
Display Units: Fahrenheit (ºF) and Celsius (ºC)
Outputs: 3 S.P.S.T (Yellow = System Pump.), (White = Open MOV.), (Blue = Close MOV), (Red = MOV Common)
Output Relay Ratings: 1 Amp inductive (Maximum of 1/8 HP), 6Amp resistive at 120 VAC 60 Hz
Control Modes: Outdoor Reset, Set Point
Reset Ratios: 12 Standard ranging from 8:1 to 1:4 (Outdoor: System), and one Custom
Set Point: from -10˚F (-23˚C) to 230˚F (110˚C)
Pump Run-On: from 0 to 60 minutes
Minimum Boiler Return: 120˚F (158˚C) Requires a Return Sensor (Optional)
Valve Mode: Auto, Close , Open
Setback: from 0˚F (0˚C) to 80˚F (44˚C)
Boost: Yes, No
Sensor Fault Operating Options: Output On or Output Off
Temperature Ranges: from -10˚F (-23˚C) to 230˚F (110˚C)
LED: 3 representing the Output relays (Left=Close, Middle=Open, Right=System Pump)
Buttons: 3 (Set, Up, Down)
Enable/Disable: Terminals EXT+, EXT-