TriangleTube Optima Series Installation instructions






ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
F
H
J
Power
CAUTION: Risk of Electric Shock.
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PWR
L N
1 2
E
3 4
F
5 6
G
7 8
H
9 10
I
11 12
EXTENSION
MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
E
G
I
Comm
Ext B
K
M
O
L
N
P
1716
VLTmA
CUR / VLT
201916
VLTmAGND
CUR / VLT
232219
VLTmAGND
CUR / VLT
262522
VLTmAGND
CUR / VLT
J
13 14
K M OL N P
E F G H
K ML N
15
GND
18
GND
21
GND
24
GND
2928
VLTmA
CUR / VLT
323116
VLTmAGND
CUR / VLT
27
GND
30
GND
I J
O P
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
SCCX6
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
SYSTEM
A
B
C
D
12
RUNPROGRAM
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 12VA MAX
INPUT RATINGS:
USE COPPER CONDUCTORS ONLY
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
345678910 11 12 13 15
14 17
16 18 22
20
19 21 24
23 29
25 27
26 28 32
30 31
LN
-+
+
TT
OORS-485
mA
GND VLT
SYS ABCD
PWR
CUR / VLT
A
-+
+
mA
GND VLT
-+
+
mA
GND VLT
-+
+
mA
GND VLT
+
mA
TEMP
OUTDOOR
OO
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PROVE
/DHW
SHUTDOWN
/TSTAT
/SETBACK
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA


SCC4
SCCX6 Extension


2 TriangleTube Optima Series
              
                 
         
ResetRatio/OutdoorReset           6
MakeSureYouHavetheRightControl    7
                
SelectingtheSystemFeatures        7
                
MountingtheEnclosure            8
InstalltheSensors              9
HeatingSystemSensor(HSS)Installation   9
OutdoorSensorInstallation           9
Wiring                     9
WiringthePower                9
WiringtheSensors              10
WiringtheShutdown,Tstat,orSetback    10
WiringtheProve                10
WiringtheDomesticHotWaterCallDHW   11
WiringtheSystemOutput           11
WiringtheBoilers                11
WiringtoModulatingOutput          11
ConnectingtotheSCCX6ExtensionPanels 14
              
StartupSettings               15
ProgramChangeSettings           15
StartupSequence               15
SensorType                  15
EMSInputMode                15
SelectingtheOutputType          15
ModulatingMode               15
Prove/DomesticHotWater(DHW)Priority  16
DomesticHotWaterSetPoint        16
Shutdown/Tstat/SetbackMode        16
BoostMode                  16
SensorFault                  17
SettingtheControltoFactoryDefaults   17
OperatingSettings             18
ProgramChangeSettings           18
Season                    18
SetPoint                    18
ResetRatio                  18
OutdoorCutoffTemperature          19
Offset                     19
MinimumWaterTemp             19
MaximumWaterTemp             19
SystemSettings              20
Gain                       20
LeadBoilerRotation              20
PurgeDelay                 21
LagDelay                   21
StandbyDelay                 21
SystemRun-On                 21
Setback                    22
LastStageHold                 22
Day/NightSchedules             23
SetTime                    23
History                   23
Maintenance                24
System&OutdoorSensorTrim        24
Soft-OffDelay                  24
OutputTrim                  24
Conguration                 25
Display                    25
BoilerStageSettings            26
Mode                     26
Ignition%                   27
ModulationStart%              27
CopySettings-BoilerAOnly          27
            
    
   
 
              
SCC4Specications            32
SCCX6ExtensionSpecications      32


SCC4andSCCX6-ExtensionInstallationManual 3


The SCC4 is the perfect control whenever multiple fully modulating stages are required for hydronic heating applications. The SCC4
controls the on/off and the modulation of each stage to maintain precise system set point control.

The SCC4’s control algorithms allow it to look at the rate of change in the system. If the system temperature is changing quickly, the
SCC4 will react quickly to adjust the modulating stages’ output. If the system temperature changes slowly, the SCC4 will make slow and
gradual output adjustments. Therefore, the SCC4 adapts to specic system requirements and minimizes uctuations around the set point.

The SCC4 is designed to accurately control the output from 0 to 100% of modulation for each of these different types of motors. One
SCC4 can even control a variety of the above different motors.

When Set Point sensor type is selected, the SCC4 requires only one sensor located in the common output header of all stages. However,
when Reset is selected, an additional Outdoor Sensor is required for Outdoor Reset Ratio input.

The SCC4’s alphanumeric digital display names each system parameter in simple English and shows its precise value. The easy to follow
menu system allows users to quickly make changes to any system setting without having to learn any specialized codes or keyboard
commands.

Rotating the rst stage to be activated on a call for output promotes even wear on each stage. The SCC4 has three modes of rotation:
Manual, Last On, or Time. The Time rotates the lead stage every selected time period from every hour to every 60 days.

The SCC4 has a hydronic outdoor temperature reset function. This allows the SCC4 to change the set point based on outdoor temperature.
Furthermore, additional settings have been added to ne tune this operation, like Offset, Minimum, and Maximum Water Temperature
and night setback schedule.

Each of the SCC4 stages can be congured as a Standby boiler with an adjustable Standby delay. A boiler can be used as a backup during
extended large demand periods.

In Set Point mode, this output can be used to activate a system pump, combustion air damper, or perform any other function that is required
when any stage is active. In Outdoor Reset mode, the System Output will activate whenever the outdoor temperature is below the Outdoor
Cutoff setting. A System Prove input checks the status of components activated by the System output before stages can be activated.

The SCC4 can stage boilers as needed. That will allow it to increase the modulation on the lead boiler. When the lead boiler reaches
its modulation start point adjustment and does not satisfy the load, the SCC4 will start the next boiler and so on... Moreover, the SCC4
allows for a parallel mode that can modulate several boilers together as one large boiler. This mode is useful for boilers with lower water
content, which are usually more efcient at lower ring points.

As a stand-alone, the SCC4 is designed to control four modulating boilers. However, it has the capability of expanding its control to two
extension panels each with six boiler stages. Thus, the SCC4 can control a total of up to 16 boiler stages.

4 TriangleTube Optima Series
SYSTEM
A
B
C
D
12
RUNPROGRAM
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 12VA MAX
INPUT RATINGS:
USE COPPER CONDUCTORS ONLY
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
345678910 11 12 13 15
14 17
16 18 22
20
19 21 24
23 29
25 27
26 28 32
30 31
LN
-+
+TT
OORS-485
mA
GND VLT
SYS ABCD
PWR
CUR / VLT
A
-+
+
mA
GND VLT
-+
+
mA
GND VLT
-+
+
mA
GND VLT
+
mA
TEMP
OUTDOOR
OO
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PROVE
/DHW
SHUTDOWN
/TSTAT
/SETBACK
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
The digital display shows the system status, set point,
lead stage <in brackets>, and status of each stage.
To view and adjust settings, press the appropriate buttons.
120VAC Power
Four N.O. Boiler startup relay
outputs. Each is wired in series
with each boiler's limit circuit.
System Output controls
pumps, valves, or other
system components.
Four modulation outputs can be 0-5V,
0-10V, 1-5V, 2-10V, or 4-20ma. Go to
Startup Menu to determine the type of
output for each stage.
LED indicates the
associated relay status.
Buttons function is presented on
Bottom Row of display.
When connecting Outdoor and System
Sensors, no Polarity is observed.
Prove terminals must be connected
to the SCC4 to operate boilers.
Connect Extension panels to
add additional stages using
a phone style cable (Cable
provided with SCCX6 Extension).
Program Switch to restrict access to
function changes. This switch is
covered with Wiring Enclosure.
SCC4


SCC4andSCCX6-ExtensionInstallationManual 5
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
F
H
J
Power
CAUTION: Risk of Electric Shock.
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PWR
L N
1 2
E
3 4
F
5 6
G
7 8
H
9 10
I
11 12
EXTENSION
MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
E
G
I
Comm
Ext B
K
M
O
L
N
P
1716
VLTmA
CUR / VLT
201916
VLTmAGND
CUR / VLT
232219
VLTmAGND
CUR / VLT
262522
VLTmAGND
CUR / VLT
J
13 14
K M OL N P
E F G H
K ML N
15
GND
18
GND
21
GND
24
GND
2928
VLTmA
CUR / VLT
323116
VLTmAGND
CUR / VLT
27
GND
30
GND
I J
O P
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
SCCX6
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
120VAC Power
Six N.O. Boiler startup relay
outputs. Each is wired in series
with the boiler's limit circuit.
Six modulating outputs can be 0-5V,
0-10V, 1-5V, 2-10V, or 4-20ma. Go
to the SCC4 Startup Menu to determine
the type of output for each stage.
LED indicates the
associated relay status.
Connect to SCC4 and additional
Extension panels to add additional
stages using a phone style cable
(Cable provided with SCCX6 Extension).
Extension Selection Switch to determine
Stage letters and LED colors.
Ext-A Stages E - J and all LEDs are Green
Ext-B Stages K - P and all LEDs are Red
This switch is covered with the Wiring Enclosure.


6 TriangleTube Optima Series

The SCC4 has multiple operating modes that satisfy most hydronic systems. It can change the
System Set Point based on outdoor temperature (Outdoor Reset) or it can modulate its stages
to achieve an adjustable xed Set Point.
In Outdoor Reset, the SCC4 controls a hot water heating system to provide a building with
comfortable and even heat levels. The SCC4 varies the temperature of the circulating heating
water in response to changes in the outdoor temperature. The heating water temperature is
controlled through the modulation of stages.
The SCC4 also controls the system circulating pump with an adjustable Outdoor Cutoff. When
the outdoor temperature is above Outdoor Cutoff, the pump is off and no heating water is
circulated through the system. When the outdoor temperature drops below the Outdoor Cutoff,
the system pump relay is activated and the heating water circulates through the system. The
temperature of the heating water is controlled by the Reset Ratio, Water Offset, and changes
with Outdoor temperature.

When a building is being heated, heat escapes through the walls, doors, and windows to
the colder outside air. The colder the outside temperature, the more heat escapes. If you
can input heat into the building at the same rate that it is lost out of the building, then the
building temperatures will remain constant. The Reset Ratio is an adjustment that lets
you achieve this equilibrium between heat input and heat loss.
The starting point for most systems is the 1.00 (OD):1.00 (SYS) (Outdoor Temperature
: Heating Water Temperature) ratio. This means that for every degree the outdoor
temperature drops, the temperature of the heating water will increase one degree. The
starting point of the curve is adjustable, but comes factory selected at 70°F Outdoor
Temp. and 100°F Water Temp. For example with a 1.00 (OD):1.00 (SYS) ratio, if the
outdoor temperature is 50°F, this means the temperature has fallen 20° from the starting
point of 70°F. Therefore, the heating water temperature will increase 20° to 120°F.
Each building has different heat loss characteristics. A very well insulated building will
not lose much heat to the outside air, and may need a Reset Ratio of 2.00 (OD):1.00
(SYS) (Outdoor:Water). This means the outdoor temperature would have to drop
2 degrees to increase the water temperature 1 degree. On the other hand, a poorly
insulated building with insufcient radiation may need a Reset Ratio of 1.00 (OD):2.00
(SYS). This means that for each degree the outdoor temperature dropped the water
temperature will increase 2 degrees. The SCC4 has a full range of Reset Ratios to
match any buildings heat loss characteristics.
A heating curve that relies not only on Outdoor temperature but also on type of radiation
will improve heat comfort. The following are suggested initial settings for different
types of radiation based on average building insulation and heat loss. The contractor
can ne tune these adjustments based on the specic building need.
  
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 20
30 0 -10
10 -20
100
120
110
130
140
150
160
180
170
190
200
210
220
1:3 1:2 1:1.5
1:1.25
1:1
1.25:1
1.5:1
2:1
3:1
4:1
Water Temperature (in °F)
Reset Ratio Curves
Reset Ratio is Presented as
Outdoor Temp. : Water Temp. Ratio
1:4








Outdoor Temperature
Water Temperature
70 405060
130
120
110
100
Outdoor Temperature
Water Temperature
70 405060
110
100
90
80
Outdoor Temperature
Water Temperature
70 405060
150
140
130
120
1:4
With a 0° Offset, the
Reset curves begin at
100° Water Temperature.
With a -20° Offset, the
Reset curves begin at
80° Water Temperature.
With a +20° Offset, the
Reset curves begin at
120° Water Temperature.
1:4
1:4 1:1
1:1
1:1
4:1
4:1
4:1
90
100
+20 Offset
-20 Offset
Outdoor Temperature
Water Temperature
70 405060
130
120
110
100
1:4 1:1
4:1
Colder
Warmer

SCC4andSCCX6-ExtensionInstallationManual 7

If you need the SCC4 to do additional tasks that either are not listed or do not know how to congure them, contact Triangle Tube
Engineering Department by Phone [phone] or Fax [phone].

Setting an Initial Program will ease the conguration of the SCC4 and will give the opportunity to utilize many of the energy saving
features and give more comfortable heat when needed.
The program should consist of the following:
• Selecting the features that your system can utilize,
• Installation: Install the Control, switches and sensors,
• Setting the System Startup,
• Setting the System Settings,
• Setting the Stages
• Adjusting Reset Ratio and Water Offset (In Reset Mode Only)

The SCC4 has been designed with Hydronic building heating as the primary purpose. With this in mind, many of the SCC4 features can
be utilized to ease, enhance and improve your system performance. Some of these features are listed in this section.

• The SCC4 can control the System Temperature either by adjusting the calculated temperature according to the Outdoor Temperature
(Outdoor Reset) or by maintaining an adjustable xed Set Point. The earlier relies on an Outdoor Sensor (supplied with the control)
and achieves better fuel savings in addition to better comfort.

• The SCC4 can be congured to control up to 4 modulating boilers. It can control up to 16 boiler stages using a maximum of two
SCCX6 Extension Panels

• The SCC4 can stage boilers using one of two methods. Normal Modulation Mode, allows it to increase the modulation of the lead
boiler. When the lead boiler reaches its modulation start point adjustment and does not satisfy the load, the SCC4 will start the next
boiler and so on. This mode targets boilers that can run more efcient at higher modulation rates.
• The Parallel Modulation Mode can modulate several boilers together as one large boiler. This mode is useful for boilers that are
more efcient at lower ring points.

• The SCC4 is designed to accurately control the output from 0 to 100% of modulation for each of these different types of motors. One
SCC4 can even control a variety of the above different modulation motors.

• Rotating the rst burner to be activated on a call for output promotes even wear on all burners. The SCC4 has three modes of rotation:
Manual, Last-ON, or Time automatically rotating every selected time period from every hour to every 60 days.

• Any boiler can be congured as a Standby boiler. It withholds a specic boiler from being included in the Lead Rotation. However,
the Standby boiler will be red only as a backup when all other stages combined cannot satisfy the demand and after an adjustable
delay period.

8 TriangleTube Optima Series

Two Setback modes are available for the SCC4:
• The Day/Night Scheduling provides an adjustable time-based schedule for the Setback.
• The Setback mode uses an external signal to switch the operation of the SCC4 in and out of setback mode.

• This feature lets the SCC4 run the SYS relay for a longer period after the boilers have been turned off. When this relay is used to
control a pump, it helps in dissipating the excess heat from the boilers combustion chamber.

Each of the SCC4 or SCCX6 Extension consists of three primary enclosure components.
• TheEnclosureDisplayModule: contains the display, buttons, LEDs and electric wiring terminals. It has two screws to hold it to
the base. A program conguration switch, used to adjust SCC4 settings, is placed above the terminals. This switch is enclosed with
the enclosure wiring cover for security. Wiring terminals are of the plug-in type to ease installation and removal.
• TheEnclosureBase: contains the holes to mount and hold the control against the wall or any at surface. All other enclosure
components mount on the base. The bottom section of the Enclosure Base contains the wiring chamber with knockouts on the
bottom to easy installation.
• TheEnclosureWiringCover: seals the wires from the external environment.
It has two screws to hold it the base and a hole to secure a lock on the wiring
enclosure. A plastic web that separates the wiring chamber into high and low
volt sections has been provided.

• Select a location near the equipment to be controlled.
• The surface should be at and sufciently wide and strong to hold the SCC4
or the SCCX6 Ext.
• Keep the control away from extreme heat, cold, or humidity. Ambient
operating temperature is from 20 to 120°F.
• Remove the Enclosure Wiring Cover from the control enclosure by removing
the two bottom screws.
• Remove the Enclosure Display Module by removing the middle screws.
• Screw the Enclosure Base to the surface through the upper and lower
mounting holes on the back of the enclosure.
• Replace the Enclosure Display Module and replace the middle screws.
• Do not replace the enclosure wiring cover until all wiring is done.
• When purchasing a padlock for the enclosure, the maximum shank diameter
should not exceed ¼" Mounting Holes
Display Mounting Screws
Wiring Cover
Mounting Screws
Enclosure Display Module
Enclosure Wiring Cover Enclosure Base
Hole for optional lock
(not supplied)

SCC4andSCCX6-ExtensionInstallationManual 9



• Put the Heating System sensor approximately 10' feet past the last boiler on the
common supply header but before any major takeoffs.
• The sensor must be located where it sees the output of all the boiler stages. If
a boiler is piped so that the sensor does not see its output, the SCC4 will not
sequence the boilers correctly.
• Only use a Standard Brass Tube sensor provided.
• The sensor wires can be extended up to 500' using a shielded 2-conductor cable
(Belden #8760 or equivalent). Do not ground the shield at the sensor but at the
panel using one of the terminals marked with an “O”.
• Do not run sensor wires in conduit with line voltage wiring.
• Install a 3/8"ID 1/2"NPT immersion well.
• Insert the sensor probe of the supplied sensor into the well.
Immersion Well
3/8" ID 1/2" NPT
Heating System
Sensor
Common Supply Pipe
Sensor Probe
Immersion Heating System Sensor
Shield
Common Supply Pipe
Sensor Probe
Strap-On Heating System Sensor
Shield
Pipe Insulation
Connect
To control

IftheHSScannotsensethecorrectheating
systemwatertemperaturebeingsupplied
tothebuilding,theSCC4willnotprovide
comfortableheatlevels BesuretheHSSis
locatedonamainsupplypipewhichcannot
easilybeisolatedfromthesystem

• Only use the outdoor sensor included with the unit.
• Locate the sensor in the shade on the north side of the building. The sensor
should never be in direct sunlight.
• Be sure the location is away from doors, windows, exhaust fans, vents, or other
possible heat sources.
• The sensor should be mounted approximately 10' feet above ground level.
• Adhere the Outdoor Label provided to the back of the sensor base.
• Use the Enclosure Base bottom knockout for the conduit. Use the locknut to hold
the conduit and enclosure base together. Screw the cover to the base.
• If screws are used to afx the enclosure to the wall, make sure to seal around the
sensor and wall except from the bottom.
• The sensor wires can be extended up to 500' using shielded 2-conductor cable
(#18/2). Do not ground the shield at the sensor but at the control using the
terminal marked with an “O”.
• Do not run sensor wires in conduit with line voltage wiring.




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



• Bring the 120VAC 60Hz power wires through the bottom Knockout of the enclosure.
• Connect the hot line to terminal marked L.
• Connect the neutral line to the terminal marked N.
• Triangle Tube recommends installing a surge suppressor on the power source to the SCC4.



Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
12
RUNPROGRAM DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
345678910 11 12 13 15
14 17
16 18 22
20
19 21 24
23 29
25 27
26 28 32
30 31
LN
-+
+
TT
OORS-485
mA
GND VLT
SYS ABCD
PWR
CUR / VLT
A
-+
+
mA
GND VLT
-+
+
mA
GND VLT
-+
+
mA
GND VLT
+
mA
TEMP
OUTDOOR
OO
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
------
Line
Neutral
120VAC
Power Source
Outdoor Sensor
Sensor Shiled
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
System Sensor
Sensor Shiled
Shutdown,
T-Stat, or
Setback Signal
345678910 11 12
SYS ABCD
System Pump
or Pump Starter
Boiler Enable
Output
Boiler
Boiler 4-20mA
Modulation Output
4-20mA
Burner
Motor
-+
Boiler Voltage
Modulation Output
Voltage
Burner
Motor
GND V+
PROVE
/DHW
SHUTDOWN
/SETBACK
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
Prove Signal
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
DHW Signal
PROVE
/DHW
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
L
N
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT SHUTDOWN
/SETBACK
/TSTAT

10 TriangleTube Optima Series





• A SCC4 must be connected to a temperature sensor located in the common header.
• The SCC4 is designed to be connected to the provided temperature sensor for immersion
in a 3/8ID well. Contact the factory for additional temperature sensor options.
• Temperature sensor wires can be extended up to 500’ by splicing shielded
2-conductor cable (Belden #8760 or equivalent (#18/2)).
• Temperature sensors have no polarity. Connect the two wires from the sensor
to the SCC4 terminals marked SYSTEM TEMP 27, 28.
• Connect the sensor shield to the circled terminal 28 with one of the sensor wires.
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
12
RUNPROGRAM DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
345678910 11 12 13 15
14 17
16 18 22
20
19 21 24
23 29
25 27
26 28 32
30 31
LN
-+
+
TT
OORS-485
mA
GND VLT
SYS ABCD
PWR
CUR / VLT
A
-+
+
mA
GND VLT
-+
+
mA
GND VLT
-+
+
mA
GND VLT
+
mA
TEMP
OUTDOOR
OO
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
------
Line
Neutral
120VAC
Power Source
Outdoor Sensor
Sensor Shiled
29
25
27
26 28
32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
System Sensor
Sensor Shiled
Shutdown,
T-Stat, or
Setback Signal
345678910 11 12
SYS ABCD
System Pump
or Pump Starter
Boiler Enable
Output
Boiler
Boiler 4-20mA
Modulation Output
4-20mA
Burner
Motor
-+
Boiler Voltage
Modulation Output
Voltage
Burner
Motor
GND V+
PROVE
/DHW
SHUTDOWN
/SETBACK
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
Prove Signal
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
DHW Signal
PROVE
/DHW
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
L
N
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT SHUTDOWN
/SETBACK
/TSTAT
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
12
RUNPROGRAM DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
345678910 11 12 13 15
14 17
16 18 22
20
19 21 24
23 29
25 27
26
28 32
30 31
LN
-+
+
TT
O
ORS-485
mA
GND VLT
SYS ABCD
PWR
CUR / VLT
A
-+
+
mA
GND VLT
-+
+
mA
GND VLT
-+
+
mA
GND VLT
+
mA
TEMP
OUTDOOR
OO
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
------
Line
Neutral
120VAC
Power Source
Outdoor Sensor
Sensor Shiled
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
System Sensor
Sensor Shiled
Shutdown,
T-Stat, or
Setback Signal
345678910 11 12
SYS ABCD
System Pump
or Pump Starter
Boiler Enable
Output
Boiler
Boiler 4-20mA
Modulation Output
4-20mA
Burner
Motor
-+
Boiler Voltage
Modulation Output
Voltage
Burner
Motor
GND V+
PROVE
/DHW
SHUTDOWN
/SETBACK
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
Prove Signal
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
DHW Signal
PROVE
/DHW
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
L
N
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT SHUTDOWN
/SETBACK
/TSTAT


• When Outdoor Reset is selected, the SCC4 will vary the system Set Point based on outdoor temperature.
• Whether in Set Point or Outdoor Reset modes, the outdoor sensor can be used as an Outdoor Cutoff. The SCC4 will
disable all boilers when the outdoor temperature is above the adjustable Outdoor Cutoff temperature. This feature
will automatically be activated when an outdoor sensor is connected.
• For an outdoor sensor use the provided sensor with its enclosure.
• The sensor wires can be extended up to 500’ using shielded 2-conductor cable (Belden #8760 or equivalent (#18/2)).
• Temperature sensors have no polarity. Connect the wires from the outdoor sensor to the SCC4 terminals marked
OUTDOOR TEMP - 25, 26.
• Connect the shield to the circled terminal 26 with one of the sensor wires.


• The Shutdown will be available when selected as the Shutdown/Tstat/Setback mode from the Startup menu. See
"Shutdown/Tstat/Setback Mode" on page 16. This will provide the user with an adjustable Day/Night Schedule. See
"Day/Night Schedules" on page 23.
• The Shutdown feature can be used whenever it is desirable to turn off the SCC4 stage outputs from a remote
location or another controller (i.e. EMS input).
• The Tstat option, when selected from the Shutdown/Tstat/Setback startup menu, provide the capability of controlling
the operation of the SCC4 based on a thermostat input. See page 16. This will provide the user with an adjustable
Day/Night Schedule. See "Day/Night Schedules" on page 23.
• The thermostat will provide the SCC4 with a call for heat by shorting terminals 31 and 32.
• When the Shutdown input is enabled by closing the dry contact, or when the Tstat input is disabled by opening the
dry-contact, all active boilers will immediately modulate down to low for the Soft-Off period, then turn off.
• The System Output relay will remain active until the System Run-On Delay expires and then it will turn off.
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
12
RUNPROGRAM DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
345678910 11 12 13 15
14 17
16 18 22
20
19 21 24
23 29
25 27
26 28
32
30 31
LN
-+
+
TT
OORS-485
mA
GND VLT
SYS ABCD
PWR
CUR / VLT
A
-+
+
mA
GND VLT
-+
+
mA
GND VLT
-+
+
mA
GND VLT
+
mA
TEMP
OUTDOOR
OO
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
------
Line
Neutral
120VAC
Power Source
Outdoor Sensor
Sensor Shiled
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
System Sensor
Sensor Shiled
Shutdown,
T-Stat, or
Setback Signal
345678910 11 12
SYS ABCD
System Pump
or Pump Starter
Boiler Enable
Output
Boiler
Boiler 4-20mA
Modulation Output
4-20mA
Burner
Motor
-+
Boiler Voltage
Modulation Output
Voltage
Burner
Motor
GND V+
PROVE
/DHW
SHUTDOWN
/SETBACK
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
Prove Signal
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
DHW Signal
PROVE
/DHW
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
L
N
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT SHUTDOWN
/SETBACK
/TSTAT
• When Setback is selected in the Startup, a BMS/EMS or external clock can provide a Setback signal using these input terminals.
No Day/Night Schedule will be available when Setback is selected from the Shutdown/Tstat/Setback mode in the Startup menu.
• The signal must be a dry contact only. No voltage can be placed across the SHUTDOWN/TSTAT/SETBACK terminals.
• Bring the two wires from the dry contact to the terminals marked SHUTDOWN/TSTAT/SETBACK- 31,32.


• The Prove feature is provided to check system component operation and must be selected in the Startup Menu.
See "Prove/Domestic Hot Water (DHW) Priority" on page 16 The Prove input cannot be used as a safety limit.
• A typical use of this feature is to check for pump ow before ring any boiler.
• If the PROVE input is open, the SCC4 will enable only the System Output. All boiler outputs will be off.
• A factory-installed jumper provides the System Prove signal. Do not remove the jumper unless it will be replaced
by a System Prove signal or use the terminals for DHW call.
• Bring the two wires from the dry contact to the terminals marked PROVE - 29, 30. No voltage can be placed
across the PROVE terminals
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
12
RUNPROGRAM DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
345678910 11 12 13 15
14 17
16 18 22
20
19 21 24
23 29
25 27
26 28 32
30 31
LN
-+
+
TT
OORS-485
mA
GND VLT
SYS ABCD
PWR
CUR / VLT
A
-+
+
mA
GND VLT
-+
+
mA
GND VLT
-+
+
mA
GND VLT
+
mA
TEMP
OUTDOOR
OO
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
------
Line
Neutral
120VAC
Power Source
Outdoor Sensor
Sensor Shiled
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
System Sensor
Sensor Shiled
Shutdown,
T-Stat, or
Setback Signal
345678910 11 12
SYS ABCD
System Pump
or Pump Starter
Boiler Enable
Output
Boiler
Boiler 4-20mA
Modulation Output
4-20mA
Burner
Motor
-+
Boiler Voltage
Modulation Output
Voltage
Burner
Motor
GND V+
PROVE
/DHW
SHUTDOWN
/SETBACK
PROVE
/DHW
29
25 27
26
28 32
30 31
TT
O
O
TEMP
OUTDOOR
OO
TEMP
SYSTEM
Prove Signal
PROVE
/DHW
29 25 27
26 28 32
30 31
TT
OO
TEMP
OUTDOOR
OO
TEMP
SYSTEM
DHW Signal
PROVE
/DHW
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
L
N
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT
SHUTDOWN
/SETBACK
/TSTAT