18
Heat-Timer Corp.
seQ control Mode
Outdoor Reset, Set Point, EMS 4-20mA
Default: Set Point
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 1
• The EMS 4-20mA option will allow the adjustment of the temperature in the following screens.
MoV control Mode
Outdoor Reset, Set Point
Default: Outdoor Reset
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
dIsplay unIt
º
F,
º
C
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
settIng tHe 4Ma and 20Ma seQ set poInts
(aVaIlaBle In 4-20Ma eMs for tHe seQ only)
4mA from -10ºF/-23ºC to 240ºF/116ºC
Default:100ºF/38ºC
20mA from -10ºF/-23ºC to 240ºF/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.
dHw pIpIng
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
.
---- 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
