heat-timer SQ-Elite-MV Service manual
R
SQ-Elite-MV
SEQUENCING CONTROL
MOV CLOSE
INPUT RATINGS: 120VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION:
Risk of Electric Shock.
PWR
L N
1 2
SENSORS MUST BE GOLD SERIES
MOV
SYS
3
MOV
CLOSE
5
Stage A
7
Stage B
9
Stage C
11 13
Stage E
15
Stage F
17
Stage D
6 8 10 12 14 16 18
RS485
SEQ=138F MOV=128F
OD=40F RTN=122F
SEQ TGT =140F
MOV TGT =130F
<AB >DE GH
HI LO --
4
SEQ
SYS
19
DHW
PUMP
21
Outdoor
Temp
27 29 31
MOV
Temp
33
SHUTDOWN
/TSTAT
/SETBACK
35
Return
Temp
20 22 28 30 32 34 36
Stage E
Stage F
SEQ SYS
DHW PUMP
Stage A
Stage B
Stage C
Stage D
25 26
DHW
37 38
SEQ PROVE
/MOV TSTAT
PROGRAM RUN
OUTPUT RATING: 2A, 120VAC.
MAXIMUM 15A TOTAL FOR ALL CIRCUITS
23 24
MOV
OPEN
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
MOV OPEN
MOV SYS
SEQ
Temp
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
C US
2 Heat-Timer Corp.
3
4
5
Reset Ratio/Outdoor Reset . . . . . . . . . . . . . . . . . . 5
6
6
6
7
7
8
System and Return Sensors Installation. . . . . . . . . . . . 8
Outdoor Sensor Installation . . . . . . . . . . . . . . . . . . 8
9
Wiring the Power. . . . . . . . . . . . . . . . . . . . . . . . 9
Wiring the Sensors. . . . . . . . . . . . . . . . . . . . . . . 9
Wiring the Domestic Hot Water Input . . . . . . . . . . . . 10
Wiring the Shutdown. . . . . . . . . . . . . . . . . . . . . 10
Wiring the SEQ Tstat. . . . . . . . . . . . . . . . . . . . . 10
Wiring the SEQ Setback . . . . . . . . . . . . . . . . . . . 10
11
Wiring the System Pumps . . . . . . . . . . . . . . . . . . 11
Wiring the DHW Pump. . . . . . . . . . . . . . . . . . . . 11
Wiring the Stages . . . . . . . . . . . . . . . . . . . . . . 12
Wiring the Motorized Valve . . . . . . . . . . . . . . . . . 12
Connecting to the SQ-Elite-EXT Panels and 4-20mA EMS
Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Selecting the SQ-Elite-EXT Panel Letter . . . . . . . . . . 12
13
Program Change Settings . . . . . . . . . . . . . . . . . . 13
Startup Sequence . . . . . . . . . . . . . . . . . . . . . . 13
SEQ Control Mode. . . . . . . . . . . . . . . . . . . . . . 18
MOV Control Mode . . . . . . . . . . . . . . . . . . . . . 18
Display Unit . . . . . . . . . . . . . . . . . . . . . . . . . 18
Setting the 4mA and 20mA SEQ Set Points . . . . . . . . . 18
DHW Piping . . . . . . . . . . . . . . . . . . . . . . . . . 18
DHW Pump Output . . . . . . . . . . . . . . . . . . . . . 19
External Input 1 Mode . . . . . . . . . . . . . . . . . . . . 19
External Input 2 Mode . . . . . . . . . . . . . . . . . . . . 19
Burner Type . . . . . . . . . . . . . . . . . . . . . . . . . 19
Boiler Output. . . . . . . . . . . . . . . . . . . . . . . . . 19
Total Boilers . . . . . . . . . . . . . . . . . . . . . . . . . 19
Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Control Logic. . . . . . . . . . . . . . . . . . . . . . . . . 20
SEQ Sensor Fault . . . . . . . . . . . . . . . . . . . . . . 20
MOV Sensor Fault . . . . . . . . . . . . . . . . . . . . . . 21
21
14
22
Program Change Settings . . . . . . . . . . . . . . . . . . 22
Season. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
22
SEQ and MOV Reset Ratio . . . . . . . . . . . . . . . . . 22
SEQ and MOV Customized Reset Ratio . . . . . . . . . . 22
SEQ and MOV Target Offset. . . . . . . . . . . . . . . . . 23
SEQ and MOV Outdoor Cutoff. . . . . . . . . . . . . . . . 23
SEQ and MOV Minimum Target . . . . . . . . . . . . . . . 24
SEQ and MOV Maximum Target. . . . . . . . . . . . . . . 24
24
24
Minimum Return . . . . . . . . . . . . . . . . . . . . . . . 24
Return Lag . . . . . . . . . . . . . . . . . . . . . . . . . . 24
25
25
Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . 25
Purge Delay . . . . . . . . . . . . . . . . . . . . . . . . . 25
Minimum Runtime . . . . . . . . . . . . . . . . . . . . . . 25
Standby Delay . . . . . . . . . . . . . . . . . . . . . . . . 25
Last Stage Hold . . . . . . . . . . . . . . . . . . . . . . . 26
Throttle. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
27
Lead Boiler. . . . . . . . . . . . . . . . . . . . . . . . . . 27
Rotate Mode . . . . . . . . . . . . . . . . . . . . . . . . . 27
27
Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
28
SEQ and MOV Setback . . . . . . . . . . . . . . . . . . . 28
SEQ and MOV Boost . . . . . . . . . . . . . . . . . . . . 28
SEQ and MOV Boost Period. . . . . . . . . . . . . . . . . 28
SEQ and MOV Day/Night Schedules . . . . . . . . . . . . 28
Set Present Time . . . . . . . . . . . . . . . . . . . . . . 28
29
DHW Priority Timer . . . . . . . . . . . . . . . . . . . . . 29
29
SEQ and MOV Run-On . . . . . . . . . . . . . . . . . . . 29
SEQ and MOV Pump Exercise . . . . . . . . . . . . . . . 29
30
Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Systems, Outdoor, or Return Sensor Trim . . . . . . . . . . 30
30
30
30
32
Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
RunTime . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
33
36
40
41
Program Change Settings . . . . . . . . . . . . . . . . . . 41
Season. . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
41
SEQ and MOV Reset Ratio . . . . . . . . . . . . . . . . . 41
SEQ and MOV Customized Reset Ratio . . . . . . . . . . 42
SEQ and MOV Target Offset. . . . . . . . . . . . . . . . . 42
SEQ and MOV Outdoor Cutoff. . . . . . . . . . . . . . . . 42
43
SEQ and MOV Setback . . . . . . . . . . . . . . . . . . . 43
SEQ and MOV Day/Night Schedules . . . . . . . . . . . . 43
: 44
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 3
SQ-Elite-MV
SEQUENCING CONTROL
MOV CLOSE
INPUT RATINGS: 120VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION:
Risk of Electric Shock.
PWR
L N
1 2
SENSORS MUST BE GOLD SERIES
MOV
SYS
3
MOV
CLOSE
5
Stage A
7
Stage B
9
Stage C
11 13
Stage E
15
Stage F
17
Stage D
6 8 10 12 14 16 18
RS485
SEQ=138F MOV=128F
OD=40F RTN=122F
SEQ TGT =140F
MOV TGT =130F
<AB >DE GH
HI LO --
4
SEQ
SYS
19
DHW
PUMP
21
Outdoor
Temp
27 29 31
MOV
Temp
33
SHUTDOWN
/TSTAT
/SETBACK
35
Return
Temp
20 22 28 30 32 34 36
Stage E
Stage F
SEQ SYS
DHW PUMP
Stage A
Stage B
Stage C
Stage D
25 26
DHW
37 38
SEQ PROVE
/MOV TSTAT
PROGRAM RUN
OUTPUT RATING: 2A, 120VAC.
MAXIMUM 15A TOTAL FOR ALL CIRCUITS
23 24
MOV
OPEN
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
MOV OPEN
MOV SYS
SEQ
Temp
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
C US
Press any button to display the Button
Function at the bottom row.
LEDs indicate
associated relay’s status
Program Switch to restrict access
to function changes. This Switch is
covered with Enclosure Wiring Cover.
SEQ System Output controls the primary
loop pump or other system components.
DHW Pump relay is controlled
when configured.
Output Relays to manage the stages.
Motorized Valve and
secondary loop pump relays
Connect to Extension panels to
add additional stages or connect
to 4-20mA EMS Interface for
external set point.
When connecting Temperature Sensors, no
Polarity is observed. Prove terminals
must be connected for SQ-Elite to
operate stages.
4 Heat-Timer Corp.
The SQ-Elite-MV controls two loops, the boiler loop and the motorized valve loop. Each has their own temperature and set of parameters
and reset settings . In addition, this conguration simplies many aspects of the installation as the same control will utilize the same
outdoor sensor and shutdown input, season settings, etc... This allows the user to control two separate heating temperatures using a
single heating control.
The SQ-Elite-MV is the perfect control whenever multiple boiler stages in addition to a motorized are required for hydronic heating
applications. As a stand-alone, the SQ-Elite-MV is designed to control six stages. However, it has the capability of expanding its control
to two extension panels each with eight stages. Thus, the SQ-Elite-MV can control a total of up to 22 stages. It controls not just all the
stages, but their pumps or valves, in addition to the secondary loop motorized valve and pump to maintain a precise system set point for
each of the primary and secondary loops.
The SQ-Elite-MV does the job of two individual heating controls. It replaces a multi-boiler/multi-stage sequencing control in addition
to managing a secondary loop motorized valve and pump. It does that with ease and exibility. Each of the primary loop and secondary
loop has their own variables and reset ratios, however share the same outdoor sensor.
The SQ-Elite-MV’s control algorithm allows it to look at the rate of change in the system. If the load is changing quickly, the SQ-Elite-MV
can be set to OSS sequencing where it will react based on load changes. It will match the load by turning on or off stages quickly. If the
system oscillations are minimal, the SQ-Elite-MV can be set to PID where it will make slow and gradual output adjustments. Therefore,
the SQ-Elite-MV adapts to specic system requirements and minimizes oscillations around the set point.
The SQ-Elite-MV’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. Two separate menus has been provided. One for the installer having all the functions. While the other is much
simpler for the day-to-day user where their primary function is to adjust or maintain specied temperatures.
Rotating the rst stage to be activated on a call for output promotes even wear on each boiler. The SQ-Elite-MV has three modes of
rotation: Manual, FOFO, or Time. The Time rotates the lead stage every selected time period from every hour to every 41 days.
Each of the loops controlled by the SQ-Elite-MV has an outdoor reset function, providing the capability to change the set point based
on outdoor temperature. Furthermore, a customizable outdoor reset curve has been incorporated for unique applications. In addition,
the following settings have been added to help ne tune all reset operation; Offset, Minimum, and Maximum Targets, and Scheduled
Setback or Setback using an External Signal.
Any of the SQ-Elite-MV heating boilers can be congured as a Standby with an adjustable Standby delay. Assigning a specic boiler to
work in standby mode will remove it from the rotation. In this mode, the boiler will be used for backup in large demand periods when
the primary boilers will not sufce.
The system outputs work with the control logic to operate a primary system pump ( boiler loop pump). The System Prove input can be
wired in to check the status of any component before any stage can be activated.
The SQ-Elite-MV can sequence heating boilers as needed. For heating systems where higher efciency is achieved using lower ring
stages, the SQ-Elite-MV offers the Parallel Sequencing option. It will sequence all the low ring stages rst before bringing the rest of
the stages on. For other types of heating boilers, using the Normal Sequencing option will bring the lower operating stage followed by
the higher one of the lead boiler. Then, follow it by doing the same with the lag boiler.
Having a DHW input as a dry-contact to be used with an external aquastat allows the SQ-Elite-MV to control a DHW pump using its
built-in output relay. The user will have different priority options that varies based on the DHW piping design.
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 5
The SQ-Elite-MV has multiple operating modes that satisfy most hydronic systems. It can
change any the of the loop temperatures' set point based on outdoor temperature. Or, it can
sequence stages to achieve an adjustable xed Set Point.
In Outdoor Reset, it controls a hot water heating system to provide a building with comfortable
and even heat levels. The SQ-Elite-MV varies the temperature of the circulating heating
water in response to changes in the outdoor temperature. The SEQ heating water temperature
is controlled through the sequencing of the stages. The MOV heating water is controlled by
modulating the motorized valve.
The SQ-Elite-MV also controls both boiler loop and motorized valve loop circulating pumps
each with their own adjustable Outdoor Cutoff. When the outdoor temperature is above the
Outdoor Cutoff, the system pump is turned off and no heating water is circulated through that
loop. 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 to 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 curves 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 insufcient 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 SQ-Elite-MV 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 specic 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
Water Temperature
70 405060
130
120
110
100
Outdoor Temperature
Water Temperature
70 405060
110
100
90
80
Outdoor Temperature
Water Tem perature
70 405060
150
140
130
120
1:4
With a 0° Offset,the
ratio curves begin at
100° Water Temperature.
With a -20° Offset,the
ratio curves begin at
80° Water Temperature.
With a +20° Offset,the
ratio 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
(O) Outdoor Temperature (in °F)
70 60 50 40 20
30 0 -10
10 -20
100
120
11 0
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
(S) Water Temperature (in °F)
Reset Ratio Curves
Reset Ratio is Presented as
Outdoor Temp.(O) : Water Temp.(S) Ratio
1:4
8:1
6 Heat-Timer Corp.
If you need the SQ-Elite-MV to do additional tasks that either are not listed or do not know how to congure them, contact Heat-
Timer Corp. Sales Department either by Phone (973)575-4004, Fax (973) 575-4052, or by E-mail support@heat-timer.com.
Setting an Initial Program will ease the conguration of the SQ-Elite-MV 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. See page 8.
• Setting the System Startup. See page 13.
• Setting the SEQ and MOV System Settings. See page 14.
• Setting the Stages. See page 25.
• Adjusting Reset Ratio and Water Offset (In Reset Mode Only). See page 22.
The SQ-Elite-MV has been designed with Hydronic heating as the primary purpose. With this in mind, many of the SQ-Elite-MV features
can be utilized to ease, enhance, and improve your system performance. Some of these features are listed in this section.
• The SQ-Elite-MV can control the boiler loop system temperature either by adjusting the calculated temperature according to the
outdoor temperature (Outdoor Reset) or by maintaining an adjustable Set Point. The Outdoor Reset option uses an Outdoor Sensor
(supplied with the control) and achieves better fuel savings in addition to better comfort.
• Using an optional 4-20mA EMS Interface (HTC# 926741-00), the SQ-Elite-MV can receive an external boiler system loop Set Point
through EMS system.
• The motorized valve loop temperature can be set based on the outdoor temperature (Outdoor Reset) or by maintaining an adjustable
Set Point.
• The SQ-Elite-MV PID can be used for applications where system reaction will require a long period to achieve or measure the
results. However, OSS, can be used for applications where the load changes frequently and the sequencing must match the load and
its immediate change.
• The SQ-Elite-MV can be congured to control up to six stages. It can control up to 22 stages using a maximum of two SQ-Elite-
EXT Extension Panels each with eight stages.
• The SQ-Elite-MV can control multiple stages in addition to boiler pumps or valves.
• The control of the DHW is based on using a dry-contact from an aquastat. The SQ-Elite-MV provides multiple DHW Priority options
to choose from based on the DHW piping. The Prove input can be used to check the status on the System Pump Flow switch or any
other devices before any stage is energized.
•
The optional return line sensor, can be purchased separately, to monitor and help protect the boilers from thermal shock and
condensation caused by cool returns.
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 7
•
What makes the SQ-Elite-MV unique is its ability to control the sequencing of the boiler stages in addition to modulating a
oating motorized valve to achieve the desired building comfort. Thus, eliminating the need of having two controls each with its
own set of wiring and settings. I.e., the same outdoor sensor, shutdown input, and season setting is used for the boiler system loop
as well as the motorized valve secondary loop.
• Rotating the lead boiler to be activated on a call for output promotes even wear on all boilers. The SQ-Elite-MV has three modes of
rotation: Manual, First-On-First-Off, or Timed Rotation. This option automatically rotates boilers every selected time period from
one hour to every 41 days (999 hours) .
Two Setback modes are available for the SQ-Elite:
• The Day/Night Scheduling provides an adjustable time-based schedule for the Setback.
• The External Input 1`Setback mode uses an external signal to switch the operation of the SEQ in and out of setback mode.
Each of the SQ-Elite-MV or SQ-Elite-EXT consists of three primary enclosure
components.
• TheEnclosureDisplayModule: contains the display, buttons, LEDs
and electric wiring terminals. It has two screws to hold it to the base. A
program conguration switch, used to adjust SQ-Elite-MV 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.
• TheEnclosureBase: 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.
• TheEnclosureWiringCover: 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 be sufciently wide and strong to hold the
SQ-Elite-MV or SQ-Elite-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 Base
Display Mounting Screws Wiring Cover Mounting Screws
Enclosure Display Module
Enclosure Wiring Cover Enclosure Base
Hole for optional
Padlock (not supplied)
8 Heat-Timer Corp.
• Only use the Standard Brass Tube sensors (HTC #904250-00) supplied as the
SEQ System Sensor and MOV System Sensor. The Return Sensor is optional
and can be purchased separately.
• The sensor wires can be extended up to 500' using a shielded 2-conductor cable
(Belden #8760 or equivalent). Do not connect the shield at the sensor but at the
panel using one of the terminals marked with an “O”.
• Install a 3/8"ID immersion well (HT # 904011-00).
• Insert the sensor probe of the supplied sensor into the well.
• Do not run sensor wires in conduit with line voltage wiring.
• Place the SEQ System sensor approximately 10' feet past the last heating boiler
on the common supply header but before any major takeoffs.
• The SEQ System sensor must be located where it sees the output of all the stages.
If a boiler is piped so that the SEQ System sensor does not see its output, the SQ-
Elite-MV will not sequence the boilers correctly.
• Place the MOV System sensor approximately 10' feet past the motorized valve
but before any major takeoffs.
• Place the Return sensor approximately 10' feet before the boilers on the SEQ
System loop return line.
Immersion Well
3/8" ID 1/2" NPT
Heating System
Sensor
Common Supply Pipe
Sensor Probe
Immersion Heating System Sensor
Shield
If any of the System Sensors cannot
sense the correct system water
temperature, the SQ-Elite-MV will not
provide comfortable heat levels.
• Only use the Heat-Timer sensor included with the unit (HT# 904220-00).
• 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 afx 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 connect 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.
Outdoor
Sensor
snap-in
location
Shield
not connected
Conduit
Outdoor Label
on back of Sensor
Outdoor Sensor
Mounting
screws
location
Seal around
sensor and wall
Outdoor
drip-hole
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 9
• Bring the 120VAC 60Hz power wires through the left bottom Knockout of the enclosure.
• Class 1 voltages must enter the enclosure through a different opening from any Class 2 voltage wiring.
• Connect the hot line to terminal marked L.
• Connect the neutral line to the terminal marked N.
PWR
L N
1 2
Line
Neutral
120VAC
Power Source
27 29 31
MOV
Temp
33 35
28 30 32 34 3625 26
SEQ
Temp
Outdoor
TEMP
SHUTDOWN
/TSTAT
/SETBACK
Return
Temp
DHW
Sensor Shiled
MOV SYS Sensor
Sensor Shiled
SEQ SYS Sensor
• The SQ-Elite-MV must be connected to a SEQ temperature sensor located in the boilers' common header.
• In addition, it must be connected to a MOV temperature sensor located after the 3-way motorized valve.
• Each of the System sensors must be inserted in 3/8ID wells (HT #904011-00).
• Temperature sensor wires can be extended up to 500’ by splicing it to a shielded 2-conductor cable (Belden
#8760 or equivalent).
• Temperature sensors have no polarity. Connect the sensor shield to the circled terminal with one of the
sensor wires. The shield MUST NOT be connected at the sensor end.
• When Outdoor Reset is selected, the SQ-Elite-MV 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 SQ-Elite-
MV will disable all Boilers and close the motorized valve 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 a Heat-Timer outdoor sensor with the enclosure (HT #904220-00).
• The sensor wires can be extended up to 500’ using shielded 2-conductor cable (Belden #8760 or equivalent).
• Temperature sensors have no polarity. Connect the wires from the outdoor sensor to the SQ-Elite-MV terminals
marked OUTDOOR TEMP - 29, 30.
• Connect the shield to the circled terminal 30 with one of the sensor wires. The shield MUST NOT be connected at
the sensor end.
27 29 31
MOV
Temp
33
28 30 3226
SEQ
Temp
Outdoor
TEMP
Return
Temp
DHW
Sensor Shiled
Outdoor Sensor
• If the Return Sensor is connected, must be purchased separately, the SQ-Elite-MV will recognize it and show its
temperature on the display. If the Return is below the Minimum Return, the SQ-Elite-MV will sequence stages
based on the Return Sensor, Minimum Return, SEQ Target, and the actual SEQ System Temperature.
• The Return on the SQ-Elite-MV is designed to be connected to a temperature sensor that can be purchased
separately (HT #904220-00) for immersion in a 3/8ID well (HT #904011-00).
• The sensor wires can be extended up to 500’ using shielded 2-conductor cable (Belden #8760 or equivalent).
• Temperature sensors have no polarity. Connect the wires from the outdoor sensor to the SQ-Elite-MV terminals
marked OUTDOOR TEMP - 31, 32.
• Connect the shield to the circled terminal 32 with one of the sensor wires. The shield MUST NOT be connected at
the sensor end.
29 31
MOV
Temp
33 35
28 30 32 34 36
Outdoor
TEMP
SHUTDOWN
/TSTAT
/SETBACK
Return
Temp
Sensor Shiled
Return Sensor
10 Heat-Timer Corp.
• DHW can be used to raise system Set Point to 200°F or Maximum Target, whichever is lower. DHW Piping
concept must be selected from the Startup Menu. See DHW Piping in Startup on page 13 and DHW Priority Timer
on page 29.
• DHW Call input terminals can accept only a dry-contact input.
• Wire an aquastat or other controls to provide dry-contact closure on the DHW terminals.
• If Shutdown was selected as the External Input 1, a DHW call will be ignored when the Shutdown is active.
27 292825 26
SEQ
Temp
DHW
DHW Call
Dry Contact
• This feature will only be available when Shutdown is selected as the External Input 1 option from the Startup
menu. See External Input 1 on page 19.
• This feature can be used whenever it is desirable to turn off the SQ-Elite-MV stage as well as close the motorized
valve from a remote location or another controller (i.e. EMS input).
• When the Shutdown feature is enabled by closing its dry-contact, all active stages will immediately turn off and the
motorized valve close relay (MOV CLOSE) will energize for six minutes to guarantee valve closure. The System
and boiler pumps' or valves' relays will remain energized for the Run-On delay period and then turn off.
• The Shutdown signal must be a dry-contact only. No voltage can be placed across the Shutdown terminals.
• Note that when the Shutdown is active, no DHW operation will take place.
MOV
Temp
33 35
34 36 37 38
SHUTDOWN
/TSTAT
/SETBACK
SEQ Prove
/MOV TSTAT
Shutdown
Dry Contact
• This feature will only be available when Tstat is selected as the External Input 1 option from the Startup menu.
See External Input 1 on page 19.
• This feature can be used whenever it is desirable to turn on the SQ-Elite-MV stages on from a remote location or
another controller (i.e. EMS input).
• When the Tstat feature is enabled by closing a dry-contact, the SQ-Elite-MV will sequence the stages to achieve the
desired SEQ Set Point. However, when the terminals are opened, all stages will de-energize.
• The Tstat signal must be a dry-contact only. No voltage can be placed across the Tstat terminals.
MOV
Temp
33 35
34 36 37 38
SHUTDOWN
/TSTAT
/SETBACK
SEQ Prove
/MOV TSTAT
SEQ Tstat
Dry Contact
• This feature can be used whenever it is desirable to reduce the SQ-Elite-MV boiler loop temperature from a remote
location (i.e. EMS input or external time clock). It will only be available when SEQ Setback is selected as the
External Input 1 option from the Startup menu. In addition, no setback scheduling will be available. See External
Input 1 on page 19.
• When the Setback is enabled by closing a dry-contact, the SEQ Target (boiler loop target temperature) will be
reduced by the Setback value.
• The Setback signal must be a dry-contact only. No voltage can be placed across the Setback terminals.
MOV
Temp
33 35
34 36 37 38
SHUTDOWN
/TSTAT
/SETBACK
SEQ Prove
/MOV TSTAT
SEQ Setback
Dry Contact
• For these terminals to function as a Prove signal, SEQ Prove must be selected from External Input 2 Startup
menu. See External Input 2 on page 19.
• The PROVE input can be used to check on the SEQ System Output. A typical use of this feature is to check for
system pump ow or a combustion air damper status before energizing any stage.
• If the PROVE input is open, the SQ-Elite-MV will leave the SEQ System Output energized. However, all stage
outputs will be off.
• A factory-installed jumper provides the SEQ System Prove signal. Do not remove the jumper unless it will be
replaced by a SEQ System Prove signal.
• No voltage can be placed across the SEQ Prove terminals
RS485
35 36 37 38
SHUTDOWN
/TSTAT
/SETBACK
SEQ Prove
/MOV TSTAT
SEQ Prove
Dry Contact
The PROVE input CANNOT be used as a safety limit. All equipment must have its own certied limit and safety
controls as required by local codes. No boiler stage will start unless Prove terminals are shorted. DO NOT remove
the PROVE jumper supplied unless replacing it with a Prove signal or changing input functionality.
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 11
• For these terminals to function as a thermostat call for the motorized valve loop signal, MOV Tstat must be
selected from External Input 2 start menu. See External Input 2 on page 19.
• This feature can be used whenever it is desirable to activate the motorized valve loop from a remote location or
another controller (i.e. Thermostat).
• When the Tstat feature is enabled by closing a dry-contact, the SQ-Elite-MV will modulate the motorized valve to
achieve the desired MOV Set Point.
• The Tstat signal must be a dry-contact only. No voltage can be placed across the Tstat terminals.
RS485
36 37 38
SHUTDOWN
/TSTAT
/SETBACK
SEQ Prove
/MOV TSTAT
MOV Tstat
Dry Contact
• Both system outputs will de-energize when the Season is set to Summer or the Shutdown input is activated.
• Connect the SEQ pump (boiler loop pump) or pump starter to terminals 15, 16 so that the SEQ System relay will
switch the hot power line to the pump.
• The SEQ System output has one Normally Open (N.O.) relay that acts as a switch. It does not source any power.
However, the relay can switch a maximum power of 2 Amp pilot duty or 6 Amp resistive load at 120VAC.
• Class 1 voltages must enter the enclosure through a different opening from any Class 2 voltage wiring.
• The SEQ System output relays will energize whenever the outdoor temperature drops below its Outdoor Cutoff. It
will de-energize when the outdoor temperature rises 2F above the respective Outdoor Cutoff and after a full SEQ
Run-on has elapsed.
• If External Input 1 was set to SEQ Tstat, the SEQ System relay will de-energize after the Run-On delay when the
SEQ Tstat input is opened.
• If Primary Secondary is selected as the DHW Piping, the SEQ System output will also energize on a call for DHW
during Summer or when SEQ Tstat input is opened.
DHW
PUMP
13
Stage E
15
Stage F
1712 14 16 18 19
SEQ
SYS
SEQ
System
Pum p
L
N
• Connect the MOV pump (Motorized valve loop pump) or pump starter to terminals 19, 20 so that the MOV
System relay will switch the hot power line to the pump.
• The MOV System output has one Normally Open (N.O.) relay that acts as a switch. It does not source any power.
However, the relay can switch a maximum power of 2 Amp pilot duty or 6 Amp resistive load at 120VAC.
• Class 1 voltages must enter the enclosure through a different opening from any Class 2 voltage wiring.
• The MOV System output relays will energize whenever the outdoor temperature drops below its Outdoor Cutoff.
It will de-energize when the outdoor temperature rises 2F above the respective Outdoor Cutoff and after the Valve
Close relay is energized for a full six minutes. The MOV System relay will remain energized for the MOV Run-
On before de-energizing.
• If External Input 2 was set to MOV Tstat, the MOV System relay will de-energize after the Run-On delay when
the MOV Tstat input is opened.
DHW
PUMP
17
16 18 19 2120 22 23
MOV
SYS
MOV
CLOSE
SEQ
SYS
MOV
System
Pump
L
N
• The SQ-Elite-MV can control the DHW Pump when the DHW Pump Output option is activated in the Startup
Menu. See DHW Pump Output on page 19.
• Connect the DHW pump or pump starter to terminals 17, 18 so that the DHW Pump relay will switch the hot
power line to the pump.
• The DHW Pump output has one Normally Open (N.O.) relay that acts as a switch. It does not source any power.
However, the relay can switch a maximum power of 2 Amp pilot duty or 6 Amp resistive load at 120VAC.
• Class 1 voltages must enter the enclosure through a different opening from any Class 2 voltage wiring.
• The SQ-Elite-MV will energize the DHW Pump whenever there is a call for DHW.
• If Shutdown was selected as the External Input 1 (See page 19), DHW calls will be ignored when Shutdown is
active.
DHW
PUMP
15
Stage F
1714 16 18 19 20
MOV
SYS
SEQ
SYS
DHW
Pump
L
N
12 Heat-Timer Corp.
The SQ-Elite-MV can be congured to operate the stages of a heating boiler or multiple boilers.
Moreover, it can be congured to operate the boiler pumps or valves in addition to the stages.
• The N.O. contacts are dry-contacts only. They do not source any voltage.
• Wire the N.O. relay contacts in series with the boiler’s limit circuit on On/Off boilers. However, on
multi-stage boilers follow the burner manufacturer diagrams to wire the individual stages.
• No stage outputs will be activated until the Prove input is shorted. If a Prove is not required, the
factory-installed jumper should remain connected or the Prove terminal functionality should change.
• Class 1 voltage wiring must enter the enclosure through a different opening from any Class 2 voltage
wiring.
PWR
L N
1 2 3 5
Stage A
7
Stage B
9
Stage C
11 13
Stage E Stage F
Stage D
6 8 10 12 14
4
Lo Hi
Unit1
Stages
Lo Hi
Unit2
Stages
• Each Stage output (A through F) has one Normally Open (N.O.) relay contact.
• Wire the N.O. relay contacts in series with the boiler’s limit circuit on On/Off boilers. However, on
multi-stage boilers follow the burner manufacturer diagrams to wire the individual stages.
• When wiring several multi-stage boilers, start with the lower stage of the rst boiler and wire it to
Output A, followed by the higher stage of the same boiler and wire it to Stage B.
• If the SQ-Elite-MV is congured to operate Stage Pumps or Valves (See Boiler Output menu under
the Startup on page 19), then, wire them using the stage after the highest ring stage on that boiler.
That is, the low stage for the rst boiler must be connected to A and the higher stage of the same
boiler must be connected to Stage B. The boiler valve or pump must be connected to Stage C.
PWR
L N
1 2 3 5
Stage A
7
Stage B
9
Stage C
11 13
Stage E
15
Stage F
Stage D
6 8 10 12 14
4
Lo Hi
Unit1
Stages
Unit1
Pump
Lo Hi
Unit2
Stages
Unit2
Pump
L
N
The SQ-Elite-MV has 2 S.P.S.T (single pole single throw) modulating output relays.
• The Motorized Valve Open and Close outputs are dry-contacts only. They do not source any power.
A separate power source must be used to provide the actuator with power.
• To ease the wiring, the power to the motorized valve can be switched using the MOV Open and Close
relay outputs. See diagram.
DHW
PUMP
13
Stage E
15
Stage F
1712 14 16 18 19 2120 22 23 24
MOV
OPEN
MOV
SYS
MOV
CLOSE
SEQ
SYS
Open
Close
Com
24VAC
Transformer
120VAC
Motorized Valve
• The SQ-Elite-MV is equipped with a 6-pin phone socket to connect to SQ-Elite-EXT Extension panels or 4-20mA EMS Interface.
• Only the 6-wire phone cable provided must be used for proper operation.
• Each SQ-Elite-EXT Extension has two RS485 communication ports. Use one to connect to the SQ-Elite. Use the other port to
connect to the second extension or 4-20mA EMS Interface.
• Additional compatible devices can utilize the second RS485 connection on the second SQ-Elite-EXT Extension. i.e. 4-20mA EMS
Interface (HT# 926741-00) to provide a 4-20mA set point signal to the SQ-Elite-MV (SEQ Set Point only). See SEQ Control
Mode on page 18.
• The SQ-Elite-MV is capable of communicating to two SQ-Elite-EXT Extensions. To avoid having
communication problem, each extension must be identied as either A or B using the switch on each
extension.
• Extension A (Switch is set to "A") will operate stages "G" through "N". While Extension B (Switch
is set to "B") will operate stages "O" through "V".
Ext A Ext B
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 13
• To be able to change the SQ-Elite-MV settings the Program/Run Switch must be set to
Program. The switch is located under the Enclosure Wiring Cover for security. The
Enclosure Wiring Cover can be securely closed using a padlock.
• To display the button functionality, press any of the four buttons below the display.
• To enter the Installer Menu, hold down the MENU Button for at least three seconds. The
Installer Menu have advanced settings in addition to the User Menu settings.
• To enter the User Menu, just press the MENU button. See User Menu Sequence on page 40.
PROGRAM RUN
A good practice after performing
any Startup menu modications
is to check all operating settings
and adjustments to match the
new settings.
Hold Button: MENU/<System Startup>
• When powered, the SQ-Elite-MV performs a self-test on its components. After the self-test
diagnostics have been successfully completed, the SQ-Elite-MV will initialize the control.
• On the rst power up, the System Startup screen will appear after the initialization is
complete. If it doesn’t, the SQ-Elite-MV has already been congured.
ARE YOU SURE?
N o
Yes
BACK SAVE
• The System Startup menu sets the main parameters like the type of logic used, the functionality of the outputs and inputs, and many
other parameters described in this section.
• Before entering the Startup menu, several warnings will alert you to the consequences of making Startup changes.
Connecting SQ-Elite-MV to Two Extension Panels
and 4-20mA EMS Interface using RS485
SQ-Elite-MV
SQ-Elite-MV
SEQUENCING CONTROL
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION:
Risk of Electric Shock.
Stage E
Stage F
Stage A
Stage B
Stage C
Stage D
PROGRAM RUN
SQ-Elite-EXT
SEQUENCING CONTROL EXTENSION
M
N
Power
CAUTION:
Risk of Electric Shock.
PWR
L N
1 2
G
3 4
H
5 6
I
7 8
J
9 10
K
11 12
EXTENSION
MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
Ext B
J
K
L
Comm
R
S
T
U
V
L
13 14
O Q SP R T
SQ-Elite-EXT A
Use Copper Conductors Only.
G
H
I
O
P
Q
M
15 16
N
17 18
U V
Power
CAUTION:
Risk of Electric Shock.
PWR
L N
1 2 3 4 5 6 7 8 9 10 11 12
EXTENSION
MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
Ext B
Comm
13 14
SQ-Elite-EXT B
Use Copper Conductors Only.
15 16 17 18
4-20 mA EMS
4-20mA INPUT
+Signal GND
123
RS485
EXTENSION
CONNECTORS
4-20mA EMS Interface
4-20mA
EMS Signal
(+)
(-)
6 Pin Phone Cable (provided with Extension)
6 Pin Phone Cable (provided with 4-20mA EMS Interface)
SQ-Elite-EXT
SEQUENCING CONTROL EXTENSION
SEQ=138F MOV=128F
OD=40F RTN=122F
SEQ TGT =140F
MOV TGT =130F
<AB >DE GH
HI LO --
L N
1 2
MOV
SYS
3
MOV
CLOSE
5
Stage A
7
Stage B
9
Stage C
11 13
Stage E
15
Stage F
17
Stage D
6 8 10 12 14 16 18
RS485
4
SEQ
SYS
19
DHW
PUMP
21 27 29 31
MOV
Temp
33
SHUTDOWN
/TSTAT
/SETBACK
35
Return
Temp
20 22 28 30 32 34 3625 26
DHW
37 38
SEQ PROVE
/MOV TSTAT
23 24
MOV
OPEN
SEQ
Temp
Outdoor
Temp
MOV CLOSE
SEQ SYS
DHW PUMP
MOV OPEN
SEQ SYS
SENSORS MUST BE GOLD SERIES
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
M
N
G H I J K
J
K
L
R
S
T
U
V
L
O Q SP R T
G
H
I
O
P
Q
M N
U V
14 Heat-Timer Corp.
------ SETTINGS ------
Season Winter
<SEQ Settings>
<MOV Settings>
<Maintenance>
<System Startup>
BACK SELECT
SEQ=138 FMOV=128 F
OD=40 F RTN=122 F
SEQ TGT=140 F
MOV TGT=130 F
<AB> CD EF
HI LO --
-SEQ CONTROL MODE -
Outdoor Reset
Set Point
EMS 4-20mA
BACK SAVE
---- DISPLAY UNIT ---
F
C
BACK SAVE
EMS 4mA SET POINT
100 F
[ ]
BACK SAVE
EMS 20mA SET POINT
170 F
[ ]
BACK SAVE
---- DHW PIPING ---
Parallel
Primary/Secondary
BACK SAVE
--DHW PUMP OUTPUT--
N o
Yes
BACK SAVE
--- BURNER TYPE ----
On/Off
2-Stage
3-Stage
4-Stage
BACK SAVE
-- BOILER OUTPUT --
None
Pump
Valve
BACK SAVE
-- TOTAL BOILERS --
6
[ ]
BACK SAVE
------ SEQUENCE -------
Lo/Hi/Lo/Hi
Lo/Lo/Hi/Hi
BACK SAVE
--- CONTROL LOGIC---
PID
OSS
BACK SAVE
-SEQ SENSOR FAULT -
Stages On
Stages Off
BACK SAVE
ARE YOU SURE?
N o
Yes
BACK SAVE
---- MAINTENANCE ----
Unit F
Present Time12:30P
Valve
<Sensor Trim>
<Histories>
<Configuration>
BACK SELECT
--- SENSOR TRIM ----
SEQ Trim +0 F
Outdoor Trim +0 F
Return Trim +0 F
MOV Trim +0 F
BACK SELECT
Sys=120 F 10:00AM
BACK NEXT
SQ-Elite-MV V1.00
SEQ Set Point
MOV Outdoor reset
4-20mA ->100 F-170 F
DHW Parallel
BACK SELECT
• Press any button to display all
button functions.
• To access Installer Menu, hold
down the Menu button for over
three seconds.
• To be able to change the SQ-Elite-
MV settings the Program/Run
Switch must be set to Program.
30
- EXTERNAL INPUT1 -
Shutdown
SEQ Tstat
SEQ Setback
BACK SAVE
-MOV CONTROL MODE -
Outdoor Reset
Set Point
BACK SAVE
- EXTERNAL INPUT2 -
SEQ Prove
MOV Tstat
BACK SAVE
-MOV SENSOR FAULT -
Valve Close
Valve Open
BACK SAVE
--- VALVE MODE ---
Auto
Close
Open
BACK SAVE
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 15
------ SETTINGS ------
Season Winter
<SEQ Settings>
<MOV Settings>
<Maintenance>
<System Startup>
BACK SELECT
SEQ=138 FMOV=128 F
OD=40 F RTN=122 F
SEQ TGT=140 F
MOV TGT=130 F
<AB> CD EF
HI LO --
--- SEQ SETTINGS ---
Set Point 140 F
EMS Set Pnt 140 F
<Outdoor Rst> 140 F
Min Return
<System Settings>
BACK SELECT
---- SET POINT ----
140 F
[ ]
BACK SAVE
-- OUTDOOR CUTOFF -
70 F
[ ]
BACK SAVE
---- RESET RATIO ---
Custom
1(8.00 OD:1.00 SYS)
2(4.00 OD:1.00 SYS)
3(3.00 OD:1.00 SYS)
4(2.00 OD:1.00 SYS)
5(1.50 OD:1.00 SYS)
6(1.25 OD:1.00 SYS)
7(1.00 OD:1.00 SYS)
8(1.00 OD:1.25 SYS)
9(1.00 OD:1.50 SYS)
10(1.00 OD:2.00 SYS)
11(1.00 OD:3.00 SYS)
12(1.00 OD:4.00 SYS)
BACK SAVE
SEQ OUTDOOR RESET
Reset Ratio 7
Target Offset +0 F
Outdoor Cutoff 70 F
Min Target 80 F
Max Target 240 F
BACK SELECT
-- TARGET OFFSET ---
+0 F
[
]
BACK SAVE
---- MIN TARGET ----
80 F
[ ]
BACK SAVE
---- MAX TARGET ----
240 F
[ ]
BACK SAVE
---- MIN RETURN ----
120 F
[ ]
BACK SAVE
22
--- PUMP EXERCISE --
Off
On
BACK SAVE
------- RUN-ON -------
2min
[ ]
BACK SAVE
DHW PRIORITY TIMER
30min
[ ]
BACK SAVE
SEQ SYSTEM SETTING
<Stage Settings>
<Setback Schedule>
DHW Prior Timer No
Run-On 2m
Pump Exercise Off
BACK SELECT
25
25
------ SETBACK -------
0 F
[ ]
BACK SAVE
- NIGHT SCHEDULE --
07:**Pm
BACK SAVE
-------- BOOST ---------
0 F
[ ]
BACK SAVE
28
SETBACK SCHEDULE
Setback 0 F
Present Time **:**
Day Schdul 7:00Am
Night Schdul 7:00Pm
BACK SELECT
-- DAY SCHEDULE ----
07:**Am
BACK SAVE
----- BOOST PERIOD---
30min
[ ]
BACK SAVE
16 Heat-Timer Corp.
----- BOILER AB -----
Mode Auto
Runtime 58Hrs
<Prev Boiler>
<Next Boiler>
BACK SAVE
-- BOILER AB MODE
-
Auto
Standby
Off
On
BACK SAVE
BOILER AB RUNTIME
58hrs
BACK CLEAR OK
------ SETTINGS ------
Season Winter
<SEQ Settings>
<MOV Settings>
<Maintenance>
<System Startup>
BACK SELECT
SEQ=138 FMOV=128 F
OD=40 F RTN=122 F
SEQ TGT=140 F
MOV TGT=130 F
<AB> CD EF
HI LO --
--- SEQ SETTINGS ---
Set Point 140 F
EMS Set Pnt 140 F
<Outdoor Rst> 140 F
Min Return
<System Settings>
BACK SELECT
SEQ SYSTEM SETTING
<Stage Settings>
<Setback Schedule>
DHW Prior Timer No
Run-On 2m
Pump Exercise Off
BACK SELECT
- STAGE SETTINGS --
Reaction Time 1min
Purge Delay 0.0min
Min Runtime 2min
Standby Delay10min
Last Stge Hold 5 F
Throttle 2 F
<Lead Settings>
BACK SELECT
-- REACTION TIME --
2min
[
]
BACK SAVE
--- PURGE DELAY ----
0.0min
[ ]
BACK SAVE
- MINIMUM RUNTIME -
2min
[
]
BACK SAVE
-- STANDBY DELAY --
10min
[
]
BACK SAVE
LAST STAGE HOLD
5 F
[ ]
BACK SAVE
-- LEAD SETTINGS --
Lead Boiler AB
Rotate Mode Time
BACK SELECT
-- LEAD BOILER --
A B
CD
BACK SELECT
-- LEAD ROTATION --
Time
Manual
FOFO
BACK SELECT
AUTO ROTATE PERIOD
24hrs
[ ]
BACK SAVE
-- THROTTLE RANGE --
2 F
[ ]
BACK SAVE
25
32
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 17
------ SETTINGS ------
Season Winter
<SEQ Settings>
<MOV Settings>
<Maintenance>
<System Startup>
BACK SELECT
SEQ=138 FMOV=128 F
OD=40 F RTN=122 F
SEQ TGT=140 F
MOV TGT=130 F
<AB> CD EF
HI LO --
--- MOV SETTINGS ---
Set Point 140 F
<Outdoor Rst> 140 F
<System Settings>
BACK SELECT
27
---- SET POINT ----
140 F
[ ]
BACK SAVE
-- OUTDOOR CUTOFF -
70 F
[ ]
BACK SAVE
---- RESET RATIO ---
Custom
1(8.00 OD:1.00 SYS)
2(4.00 OD:1.00 SYS)
3(3.00 OD:1.00 SYS)
4(2.00 OD:1.00 SYS)
5(1.50 OD:1.00 SYS)
6(1.25 OD:1.00 SYS)
7(1.00 OD:1.00 SYS)
8(1.00 OD:1.25 SYS)
9(1.00 OD:1.50 SYS)
10(1.00 OD:2.00 SYS)
11(1.00 OD:3.00 SYS)
12(1.00 OD:4.00 SYS)
BACK SAVE
MOV OUTDOOR RESET
Reset Ratio 7
Target Offset +0 F
Outdoor Cutoff 70 F
Min Target 80 F
Max Target 240 F
BACK SELECT
-- TARGET OFFSET ---
+0 F
[
]
BACK SAVE
---- MIN TARGET ----
80 F
[ ]
BACK SAVE
---- MAX TARGET ----
240 F
[ ]
BACK SAVE
MOV SYSTEM SETTING
Gain 0
Setback 0 F
Day Schdul 7:00Am
Night Schdul 7:00Pm
Run-On 2m
Pump Exercise Off
BACK SELECT
------ SETBACK -------
0 F
[ ]
BACK SAVE
- NIGHT SCHEDULE --
07:**Pm
BACK SAVE
-------- BOOST ---------
0 F
[ ]
BACK SAVE
-- DAY SCHEDULE ----
07:**Am
BACK SAVE
----- BOOST PERIOD---
30min
[ ]
BACK SAVE
--- PUMP EXERCISE --
Off
On
BACK SAVE
-------- GAIN --------
0
[ ]
BACK SAVE
------- RUN-ON -------
2min
[ ]
BACK SAVE
18 Heat-Timer Corp.
OutdoorReset,SetPoint,EMS4-20mA Default:SetPoint
Hold Button: MENU/<System Startup>/..../SEQ Control Mode
• Outdoor Reset provides a variable set point based on outdoor temperature.
• Outdoor Reset mode requires the use of an outdoor sensor. DO NOT select Reset without an
outdoor sensor.
SEQ CONTROL MODE
Outdoor Reset
Set Point
EMS 4-20mA
BACK SAVE
• SEQ Set Point mode does not require an outdoor sensor. If an outdoor sensor is connected in SEQ Set Point mode, it will be used
only as an SEQ Outdoor Cutoff point. That is, to turn the stages, stage pumps or valves, and SEQ System relays off.
• The EMS 4-20mA allows the SQ-Elite-MV to receive an external SEQ Set Point from an EMS/BMS system. This option requires
the use of the 4-20mA EMS Interface (HT# 926741-00). See Connecting 4-20mA Interface on page 12.
• The EMS 4-20mA option will allow the adjustment of the temperature in the following screens.
OutdoorReset,SetPoint Default:OutdoorReset
Hold Button: MENU/<System Startup>/..../MOV Control Mode
• Outdoor Reset provides a variable set point based on outdoor temperature.
• Outdoor Reset mode requires the use of an outdoor sensor. DO NOT select Reset without an
outdoor sensor.
• MOV Set Point mode does not require an outdoor sensor. If an outdoor sensor is connected
in MOV Set Point mode, it will be used only as an MOV Outdoor Cutoff point. That is, to
turn the MOV System relays off and close the motorized valve.
MOV CONTROL MODE
Outdoor Reset
Set Point
BACK SAVE
ºF,ºC Default:ºF
Hold Button: MENU/<System Startup>/..../Display Unit
• The SQ-Elite-MV is designed to control multiple boilers and a motorized valve in hydronic
environment where the temperature is the critical factor. This setting provides the user with
the capability of displaying temperature information and settings in either ºF (Fahrenheit) or
ºC (Celsius). Select the display unit that is best suited for your application.
---- DISPLAY UNIT ---
F
C
BACK SAVE
4mAfrom-10ºF/-23ºCto240ºF/116ºC Default:100ºF/38ºC
20mAfrom-10ºF/-23ºCto240ºF/116ºC Default:170ºF/77ºC
Hold Button: MENU/<System Startup>/..../EMS 4mA Set Point/EMS 20mA Set Point
• If EMS 4-20mA is selected from the SEQ Control Mode menu as the temperature set point
source, the user must purchase a Heat-Timer 4-20mA EMS Interface (HT# 926741-00) to
accept the 4-20mA signal and transmit it to the SQ-Elite-MV.
EMS 4mA SET POINT
100 F
[ ]
BACK SAVE
EMS 20mA SET POINT
170 F
[ ]
BACK SAVE
• In addition, the user will need to set the temperature range parameters. First, set the 4mA
temperature, then the 20mA temperature.
• To shutdown the control using the EMS signal, send a signal that is above or below the
2-22mA range. The display will show the message "Shutdown by EMS" and all
stages will de-energize. However, the system and boiler pumps or valves will remain
energized for the Run-On delay period then de-energize.
Parallel,Primary/Secondary Default:Parallel
Hold Button: MENU/<System Startup>/..../DHW Piping
• When Parallel is selected, the SQ-Elite-MV will offer a DHW Priority Timer. The DHW
Priority will only take place during heating periods by allowing the SEQ System relay to de-
energize during DHW calls. See DHW Settings on page 29.
---- DHW PIPING ---
Parallel
Primary/Secondary
BACK SAVE
• If no DHW Priority Timer was selected, the SEQ System relay will remain energized during DHW calls. However, in Summer and
SEQ Outdoor Cutoff situations, only the DHW Pump relay will energize.
• Selecting the Primary/Secondary option will energize the System relay with the DHW Pump relay whenever there is a call for
DHW even during the Summer or when the outdoor temperature is above the SEQ Outdoor Cutoff. See DHW Settings on page 29.
SQ-Elite-MV & SQ-Elite-EXT Installation Manual 19
No,Yes Default:Yes
Hold Button: MENU/<System Startup>/..../DHW Pump Output
• The SQ-Elite-MV can operate the DHW Pump. This option allows the user to select if the
SQ-Elite-MV should be controlling the DHW Pump or not.
--DHW PUMP OUTPUT--
N o
Yes
BACK SAVE
Shutdown,SEQTstat,SEQSetback Default:Shutdown
Hold Button: MENU/<System Startup>/..../External Input1
• The Shutdown function allows the SQ-Elite-MV to receive a remote dry-contact signal to
terminals 35 and 36 to turn off all relays including boilers stages.
• When Shutdown is selected, any DHW call will be ignored when the control is in Shutdown.
- EXTERNAL INPUT 1
Shutdown
SEQ Tstat
SEQ Setback
BACK SAVE
• The SEQ Tstat option gives terminals 35 and 36 the capability of functioning as a heat-call. That is, when the terminals are
shorted, the control will sequence the stages to maintain the set point. However, when terminals are opened, all stages will turn off.
Unlike the Shutdown, when SEQ Tstat is selected, a DHW call will energize the stages even if the SEQ Tstat is not active.
• SEQ Setback is used to lower the SEQ Set Point when less load is required during nights and weekends. No Schedule options will
be available for the SEQ when this option is selected. In this case, the Setback can only be activated using a remote input.
• For SEQ Setback operation, the SQ-Elite-MV can either utilize its built-in day schedule by selecting Shutdown or Tstat options, or
an external dry-contact signal to input terminals 35 and 36 to switch to setback by selecting Setback from this menu.
SEQProve,MOVTstat Default:SEQProve
Hold Button: MENU/<System Startup>/..../External Input2
• The SEQ Prove option assigns terminals 37 and 38 the Prove function for the SEQ stages.
Thus, not allowing any stage to operate when those terminals are opened. However, the SEQ
System Pump can be energized.
• If SEQ Prove is selected, make sure to connect those terminals to either a ow switch that
checks the SEQ System pump operation or a combustion air damper end switch. Otherwise,
install a jumper on terminals 37 ad 38 to allow for stage operation.
- EXTERNAL INPUT2 -
SEQ Prove
MOV Tstat
BACK SAVE
• If MOV Tstat was the option selected, the SQ-Elite-MV will activate the motorized valve heating only when terminals 37 and 38
are shorted with a dry-contact input. When the terminals are opened, the motorized valve Close relay will energize for six minutes
allowing it to fully close.
On/Off,2-Stage,3-Stage,4-Stage Default:On/Off
Hold Button: MENU/<System Startup>/..../Burner Type
• The SQ-Elite-MV can sequence from a single stage and up to four stages per boiler.
--- BURNER TYPE ----
On/Off
2-Stage
3-Stage
4-Stage
BACK SAVE
None,Pump,Valve Default:None
Hold Button: MENU/<System Startup>/..../Boiler Output
• When None is selected, the SQ-Elite-MV will sequence multiple boilers without any
additional boiler pumps or valves.
• The Pump option allows the SQ-Elite-MV to control the boiler stages in addition to their
pumps. The stage pump relay will run for the Run-On delay after the lower stage of that
boiler has de-energized.
-- BOILER OUTPUT --
None
Pump
Valve
BACK SAVE
• The Valve option functions similar to the pump option except that when all SQ-Elite-MV stages are off and after Run-On delay has
elapsed, the Lead boiler's valve relay will remain energized to allow for ow across the system. The lead boiler's valve will remain
energized until the Outdoor temperature rises above the SEQ Outdoor Cutoff or the Shutdown or Summer is activated.
1to22 Default:variesbasedonBurnerTypeandBoilerOutput
Hold Button: MENU/<System Startup>/..../Boiler Output
• This option in Combination with Burner Type and Boiler Output option will determine the
total number of stages the SQ-Elite-MV will need to control.
• If more stages are selected than the SQ-Elite-MV and SQ-Elite-EXT Extension has, the
additional boilers containing these stages will have CE displayed as their status.
-- TOTAL BOILERS --
6
[ ]
BACK SAVE
20 Heat-Timer Corp.
Lo/Hi/Lo/Hi,Lo/Lo/Hi/Hi Default:Lo/Hi/Lo/Hi
Hold Button: MENU/<System Startup>/..../Sequencing
• Some boilers are designed to run more efcient when the lower ring stages are run
than with the higher stages. These types of boilers should select Lo/Lo/Hi/Hi. Then, the
SQ-Elite-MV will sequence the lower stages of all boilers with Modes congured as Auto
before sequencing the higher stages.
------ SEQUENCE -------
Lo/Hi/Lo/Hi
Lo/Lo/Hi/Hi
BACK SAVE
• For the rest of the boiler types, the Lo/Hi/Lo/Hi should start the ring of the lower stage of the lead boiler followed by the higher
stage of the same boiler. Then when more stages are needed, it will re the lower stage of the lag boiler followed by the higher
stage of the lag boiler.
PID,OSS(Over-Sized-System) Default:PID
Hold Button: MENU/<System Startup>/..../Control Logic
• The PID option allows the SQ-Elite-MV to sequence stages based on Reaction Time and
Boiler Min Run Time. The PID relies on the rate of change in the SEQ system temperature.
The PID logarithmic calculations foresee changes and sequence stages based on those
changes. It is the most efcient operation for most heating applications. See page 25.
--- CONTROL LOGIC---
PID
OSS
BACK SAVE
• The Oversize option sequence stages based on how many Throttling ranges (differentials) is the SEQ system temperature away
from the SEQ Target temperature. At one Throttling range below the SEQ Set Point, only one stage will be on. For each additional
Throttling range below the SEQ Set Point, an additional stage will be activated. The last stage on will be allowed to exceed the
SEQ Set Point by one Throttling range before turning off. This helps prevent the last stage from short cycling. See Throttle on
page 26.
When PID is Selected, the following are the settings that directly affects this modes operation:
• Reaction Time Hold Button: MENU/SEQ Settings/System Settings/Stage Settings/Reaction Time
• Purge Delay Hold Button: MENU/SEQ Settings/System Settings/Stage Settings/Purge Delay
• Minimum Run Time Hold Button: MENU/SEQ Settings/System Settings/Stage Settings/Min Runtime
• Standby Delay Hold Button: MENU/SEQ Settings/System Settings/Stage Settings/Standby Delay
• Last Stage Hold Hold Button: MENU/SEQ Settings/System Settings/Stage Settings/Last Stage Hold
When Oversize (OSS) is Selected, the following are the settings that directly affects this modes operation:
• Throttle Hold Button: MENU/SEQ Settings/System Settings/Stage Settings/Throttle
StagesOn,StagesOff Default:StagesOn
Hold Button: MENU/<System Startup>/..../SEQ Sensor Fault
The SEQ Sensor Fault will determine the operating status of all output stages that are set to
Auto when a sensor reads Short or Open.
SEQ SENSOR FAULT
Stages On
Stages Off
BACK SAVE
• When Stages-On is selected, the SQ-Elite-MV will turn all boiler stages On when the SEQ System reads Short or Open and the
outdoor temperature is below SEQ Outdoor Cutoff. However, if the outdoor temperature is above the Outdoor Cutoff, the Outdoor
Cutoff will take over turn off the stages. When the outdoor reads Short or Open, the SQ-Elite-MV will change the Target to the
Maximum Target.
• When Stages-Off is selected, the SQ-Elite-MV will turn all stages Off when the SEQ System reads Short or Open. However, when
the Outdoor reads Short or Open, the SQ-Elite-MV will change the Target to the Minimum Target.
• When Stages-On is selected, the SQ-Elite-MV will turn all stages On when the SEQ System sensor reads Short or Open.
• When Stages-Off is selected, the SQ-Elite-MV will turn all stages Off when the SEQ System sensor reads Short or Open.
• The Outdoor Sensor Short or Open status will not affect the control operation in Set Point mode.
This manual suits for next models
1
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