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10
Heat-Timer Corp.
WIRING
wIrIng the power (terMInals 1, 2)
•
Bring the 120VAC 60Hz power wires through the bottom Knockout of the enclosure.
•
Class 1 voltage wiring must enter the enclosure through a different opening from any Class 2 voltage wiring.
•
Connect the hot line to the terminal marked L.
•
Connect the neutral line to the terminal marked N.
Class 1 voltage wiring must enter the enclosure through a different opening from any Class 2 voltage
wiring. Heat-Timer recommends installing a surge suppressor on the power source to the SQ-Elite.
Connect the Temperature sensor shield at the control to the sensor terminal marked "O".
Do not connect the Shield at the sensor end.
WIRING THE SENSORS
systeM teMperature sensor wIrIng (terMInals 27, 28)
•
The SQ-Elite is designed to be connected to a temperature sensor (HT #904250-00) for immersion in a
3/8ID well (HT #350147-00 or 904011-00) located on the common header. 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 SQ-Elite-8T terminals
marked SYSTEM TEMP 27, 28.
•
Connect the shield to the circled terminal 28 with one of the sensor wires. Do not connect the shield at the
sensor end.
outdoor sensor wIrIng (terMInals 29, 30)
•
When Outdoor Reset is selected, the SQ-Elite-8T will vary the system target based on the outdoor temperature.
•
Whether in Set Point or Outdoor Reset modes, the outdoor sensor can be used as an Outdoor Cutoff. In heating,
the SQ-Elite-8T will disable all Boilers when the outdoor temperature is above the adjustable Outdoor Cutoff
temperature. However, in cooling it will disable the units when the outdoor temperature is below the Outdoor
Cutoff. This feature will automatically be activated when an outdoor sensor is connected.
•
For an outdoor sensor, use a Heat-Timer outdoor sensor (HT #904220-00).
•
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 SQ-Elite-8T terminals
marked OUTDOOR TEMP - 29, 30. Connect the shield to the circled terminal 30 with one of the sensor wires.
Do not connect the shield at the sensor end.
return sensor wIrIng (terMInals 31, 32) optIonal (aVaIlaBle In heatIng only)
•
If the Return Sensor is connected, must be purchased separately, the SQ-Elite-8T will recognize it and alternate
its temperature on the display with the Target temperature. If the Return temperature is below the Minimum
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).
•
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 SQ-Elite-8T terminals
marked OUTDOOR TEMP - 31, 32.
•
Connect the shield to the circled terminal 32 with one of the sensor wires. Do not connect it to the sensor.
WARNING
WARNING
PWR
L N
1 2
OUTDOOR
TEMP
TEMP
25
26
27
28
29
30
OUTDOOR
RETURN
TEMP
DHW
TEMP
TEMP
27
28
29
30
31
32
33
OUTDOOR
RETURN
DHW
TEMP
TEMP
29
30
31
32
33
34
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