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heat-timer SQ-Elite-8T Installation And Operation Instruction Manual

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• InstallatIon and operatIon InstructIons Manual
SQ-Elite-8T & SQ-Elite-EXT
HYDRONIC SEQUENCING CONTROL
PWR
L N
1 2
The SQ-Elite is strictly an operating control. It CANNOT be used as a limit control. All boilers must have all
safety and limit controls required by code. It is the responsibility of the installer to verify that all the safety and
limits are working properly before the SQ-Elite is installed.
This control must be installed by a licensed electrician.
• user operatIons Manual
FOR HYDRONIC SYSTEMS
Stage A
Stage E
Stage B
Stage F
Stage C
Stage G
Stage D
Stage H
OUTPUT RATING: 2A, 120VAC.
MAXIMUM 15A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX
CAUTION:
Risk of Electric Shock.
Use Copper Conductors Only.
Stage A
Stage B
Stage C
Stage D
Stage E
Stage F
Stage G
3
4
5
6
7
8
9
10
11
12
13
14
15
SQ-Elite-8T
SEQUENCING CONTROL
144
SYS=
SYSTEM
<AB > DE
DHW PUMP
HI
COMB. AIR
STAGE
C
US
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
PROGRAM
RUN
SENSORS MUST BE GOLD SERIES
DHW
COMB.
Stage H
SYSTEM
PUMP
AIR
16
17
18
19
20
21
22
25
26
23 24
WARNING
R
35
F OD=
F
GH
JK
LO
-- OFF
MENU
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
RS485
SHUTDOWN
OUTDOOR
RETURN
SYSTEM
DHW
/TSTAT
PROVE
TEMP
TEMP
TEMP
/SETBACK
27
28
29
30
31
32
33
34
35
36
37
38

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Summary of Contents for heat-timer SQ-Elite-8T

  • Page 1 • InstallatIon and operatIon InstructIons Manual • user operatIons Manual SQ-Elite-8T & SQ-Elite-EXT HYDRONIC SEQUENCING CONTROL FOR HYDRONIC SYSTEMS SQ-Elite-8T SEQUENCING CONTROL SYS= F OD= Stage A Stage E SYSTEM <AB > DE Stage B Stage F DHW PUMP -- OFF...

  • Page 2: Table Of Contents

    Contents SQ-ELITE-8T LAYOUT ....3 Customized Reset Ratio....21 Set Point (Not Adjustable in EMS Mode) .

  • Page 3: Sq-Elite-8T Layout

    SQ-Elite-8T & SQ-Elite-EXT Installation Manual SQ-ELITE-8T LAYOUT Program Switch to restrict access to function changes. This Switch is covered with Enclosure Wiring Cover. Button function is presented on LEDs indicate bottom row of the display. associated relay’s status SQ-Elite-8T SEQUENCING CONTROL...

  • Page 4: Sq-Elite-8T Overview

    Any of the SQ-Elite-8T heating or cooling units can be configured as a Standby with an adjustable Standby delay. Assigning a specific unit to work in standby mode will remove it from the rotation. In this mode, the unit will be used for backup in large demand periods where the primary units will not suffice.

  • Page 5: Understanding Operation Concept

    Or, it can be set to Set Point and sequence stages to achieve a manually adjusted Set Point in either heating or cooling. 1.25:1 In Outdoor Reset, the SQ-Elite-8T controls a hot water heating system to provide a building 1.5:1 with comfortable and even heat levels. The SQ-Elite varies the Target temperature of the circulating heating water in response to changes in the outdoor temperature.

  • Page 6: Pid Operation

    OSS is used in fast reacting application as in process applications, where maintaining a set point is critical. The OSS utilizes the Throttle setting, as a mean to calculate the number of stages the SQ-Elite-8T shall have on at any point. For every Throttle Range below the set point an additional stage shall be turned on/energized.

  • Page 7: Make Sure You Have The Right Control

    MAKE SURE YOU HAVE THE RIGHT CONTROL If you need the SQ-Elite to do additional tasks that either are not listed or do not know how to configure 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.

  • Page 8: Installation

    • When Setback is selected from the External Input Startup menu options, an external signal can be used to switch the operation of the SQ-Elite-8T in and out of setback mode. See page 18. • The Boost can be used to bring the building to comfortable temperature settings after a Night or Setback period. It does that by increasing the target temperature in heating or decreasing it in cooling application for an adjustable period that follows the setback.

  • Page 9: Install The Sensors

    The sensor must be located where it sees the output of all the stages. If a unit Heating System Sensor Probe Sensor is piped so that the sensor does not see its output, the SQ-Elite-8T will not Strap-On Heating System Sensor sequence the units correctly. Common Supply Pipe Pipe Insulation •...

  • Page 10: Wiring

    Return, the SQ-Elite-8T will sequence stages based on the Return Sensor, Minimum Return, Calculated Target, and the actual System Temperature. • The Return on the SQ-Elite-8T is designed to be connected to a temperature sensor that can be purchased separately (HT #904250-00) for immersion in a 3/8ID well (HT #350147-00 or 904011-00). •...

  • Page 11: Wiring The Domestic Hot Water (Dhw) Sensor (Terminals 33, 34)

    This feature will only be available when Shutdown is selected as the External Input Mode option from the Startup menu on page 18. • This feature can be used whenever it is desirable to turn off the SQ-Elite-8T stage outputs from a remote location or another controller (i.e. EMS input). •...

  • Page 12: Wiring The System Output (Terminals 19, 20)

    Menu. See page 18. • The SQ-Elite-8T will energize the DHW Pump whenever there is a call for DHW using a dry contact or when the DHW temperature falls below the DHW Set Point and DHW Differential when using a DHW sensor.

  • Page 13: Connecting To The Sq-Elite-Ext Panels And 4-20Ma Ems Interface

    Stage E Stage F • If the SQ-Elite-8T is configured to operate Stage Pumps or Valves. They, must be wired to the stage output after the highest stage for that unit. That is, the low stage for the first unit must be connected to A and the higher stage of the same unit must be connected to Stage B.

  • Page 14: Installer Menu Sequence

    BACK SAVE Cool-MakeOnRise <Histories> BACK SAVE <Configuration> ------ STAGING ------ BACK SELECT Multiple Outputs ---- DHW PIPING --- Single Output SQ-ELITE-8T V1.00 Parallel Outdoor reset BACK SAVE Primary/Secondary Heating-BreakOnRise BACK SAVE Day/Night Schedule -- TOTAL BOILERS -- DHW Parallel BACK...
  • Page 15 SQ-Elite-8T & SQ-Elite-EXT Installation Manual RESET RATIO set poInt ---- SEASON --- ---- RESET RATIO --- -- EMS SET POINT -- Winter Custom 140 F Summer 1(8.00 OD:1.00 SYS) BACK SAVE 2(4.00 OD:1.00 SYS) BACK SAVE 3(3.00 OD:1.00 SYS) 4(2.00 OD:1.00 SYS)
  • Page 16 Heat-Timer Corp. STAGE SETTINGS -- STAGE SETTINGS -- -- REACTION TIME -- - SYSTEM SETTINGS - Reaction Time 1min 2min <Stage Settings> Purge Delay 0.0min <Setback Schedule> Min Runtime 2min <DHW Settings> BACK SAVE Standby Delay 10min Setback Last Stage Hold 5 F...

  • Page 17: Startup Settings

    Outdoor Cutoff point. That is, to turn the stages, system, and Comb. Air relays off. • The EMS 4-20mA allows the SQ-Elite-8T to receive an external set point from an EMS/BMS system. This option requires the use of the 4-20mA EMS Interface (HT# 926741-00).

  • Page 18: Application

    Outdoor Cutoff setting. • In Cooling, the SQ-Elite-8T will sequence stages and when the system temperature is above the set point. In addition, the system relay will energize when the outdoor temperature is at or above the Outdoor Cutoff setting.

  • Page 19: Burner Type

    • For setback operation, the SQ-Elite-8T can either utilize its built-in night schedule, available when Shutdown or Tstat is selected as the External Input, or an external dry contact signal to switch to setback by selecting Setback from this menu.

  • Page 20: Control Logic

    • When Stages-On is selected, the SQ-Elite-8T will turn all unit stages On when the System reads Short or Open and the Outdoor is below the Outdoor Cutoff. When the Outdoor reads Short or Open, the SQ-Elite-8T will change the Target to the Maximum Target.

  • Page 21: Operating Settings

    SQ-Elite-8T when in • In Heating Mode, the SQ-Elite-8T will turn all boiler relays off when it is in Summer off-season. If you do so, the setting. The Message Display Line will read Summer to show status. However, a battery will run down and DHW call will bring the boilers back on if needed.

  • Page 22: Set Point (Not Adjustable In Ems Mode)

    • When the outdoor temperature rises to the Outdoor Cutoff plus a 2°F differential, the SQ-Elite-8T will turn all boilers off. The System, Combustion Air Damper, and any other Pump or valve relays that were energized will remain energized for the Run-On delay and then de-energize.

  • Page 23: Minimum Target

    BOILER MINIMUM RETURN When a return sensor is connected to the SQ-Elite-8T, it will monitor and control the boiler return when in Heating mode. It does that by monitoring the Target temperature (TGT), System temperature (SYS), Minimum Return, and actual return. (RTN). When the SQ- Elite-8T foresees that a low return will occur, it will increase the Target automatically as an effort to increase the return temperature.

  • Page 24: Return Lag

    It is the amount of time it takes a single stage to affect the system. <Lead Settings> • After the SQ-Elite-8T turns on a stage trying to meet a set point, it will not turn on BACK SELECT another stage until the Reaction Time has elapsed.

  • Page 25: Standby Delay

    When the SQ-Elite-8T brings on the Lead Stage, the Set Point is quickly exceeded, and the Lead Stage is turned off. To prolong the run time during this type of condition, use the Last Stage Hold setting.

  • Page 26: Lead Settings

    The new Set Point will appear on the main display indicating this condition "Setback to 160 F". • For example, if in heating the calculated temperature is 180°F and the Setback is 20°F, then when in Setback, the SQ-Elite-8T will hold a Set Point of 160°F (180°F - 20°F).

  • Page 27: Boost

    In addition to the normal drop experienced between the boiler’s temperature and that operation. read by the SQ-Elite-8T sensor, the Last Stage Hold setting must be accounted for. The boiler limit must be set above the Set Point PLUS the Last Stage Hold PLUS the normal drop experienced in the piping.

  • Page 28: Set Present Time

    DHW Set Point and Differential control capability. • BACK SELECT On a DHW call, the SQ-Elite-8T will raise the Target to either 200ºF or the Maximum Target, which ever is lower. • The SQ-Elite-8T provides three levels of DHW pump operation. The first is when Primary/Secondary is selected as the DHW Piping from the Startup Menu on page 18.

  • Page 29: Pump, Valve, And Combustion Air Damper Operation

    • The SQ-Elite-8T controls multiple relays each controlling different types of equipment. In addition to the control of the boilers or cooling units, it can control, the primary system pump, unit pumps or valves, a DHW pump, and a combustion air damper.

  • Page 30: Maintenance

    10:00AM Hold Button: MENU/<Histories> The SQ-Elite-8T provides users with a graphical history of the System, Outdoor, DHW, and Return sensors for the previous 24 hours. The temperatures are sampled every 12 minutes. That is, readings of temperatures are recorded and stored every 12 minutes for the last 24 hours.
  • Page 31 Unit Pumps are being controlled by the SQ-Elite-8T. • Unit Valves are being controlled by the SQ-Elite-8T. dIsplay Messages The SQ-Elite-8T normal display layout reserved the second line for message indications. The following is a list of the most common Message Display Line information: • Summer The control is set to Summer.

  • Page 32: Boiler/C.unit Settings

    Then select the Next Stage option from the menu to bring up the Boiler CD Settings menu and make all the settings. Continue until all boilers have been set. • If a SQ-Elite-EXT is connected to the SQ-Elite-8T, scrolling through stages using the Next and Prev menu options will scroll through the SQ-Elite-EXT stages as well. ALERT To be able to change the SQ-Elite settings, the Program/Run Switch must be set to Program.

  • Page 33: Troubleshooting

    Display shows an Incorrect Temperature Display Remove the wires from the sensor terminals. The display should change to read OPEN. If it doesn’t, the SQ-Elite-8T may be damaged. Take an ohm reading across the detached sensor wires. Take an ohm reading across the detached sensor wires. The ohm reading should correspond to the Temperature sensor Table.

  • Page 34: Multiple Boilers With Pumps Piping/Wiring Diagrams

    TEMP PROVE /TSTAT PUMP TEMP TEMP /SETBACK 23 24 Heat-Timer Corp. is aware that each installation is unique. thus, heat- Unit1 Unit2 Unit3 Unit4 Timer Corp. is not responsible for any installation related to any electrical or plumbing diagram generated by Heat- Timer Corp..

  • Page 35: User Menu Sequence

    Display Line will not display any season information. • If the control was set to Cooling, the SQ-Elite-8T will turn on the cooling units when it is set to Summer. However, when it is set to Winter, The Message Display Line will read Winter to show status.

  • Page 36: Set Point (Not Adjustable In Ems Mode)

    BACK SAVE • The SQ-Elite-8T will add, subtract, or hold the stages of the heating or cooling units to maintain the system temperature around the Set point. • The system temperature can be expected to fluctuate around the set point. The amount of fluctuation depends on the System Settings and Stage Settings.

  • Page 37: Outdoor Cutoff Temperature

    Boost, SQ-Elite-8T will raise the calculated water temperature by the Boost amount. Using the previous example, at 5:30AM the SQ-Elite-8T will raise the calculated water to 170˚F (150˚F + 20˚F) until 6:00AM where it will drop back to the normal...
  • Page 38 Heat-Timer Corp.
  • Page 39 SQ-Elite-8T & SQ-Elite-EXT Installation Manual...

  • Page 40: Specifications

    ......Two RS485 20 new dutch lane, fairfield, nj 07004 973-575-4004 • fax 973-575-4052 • http://www.heat-timer.com C O R P O R A T I O N 059063-00 Rev.B...

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