SQ-Elite-MV & SQ-Elite-EXT Installation Manual
23
• To Set the first point, specify Sys Temp 1, and OD Temp 1. Then, specify Sys Temp 2, and OD Temp 2, to set the second point on
the curve. The two points can be anywhere on the line, not necessarily at the ends.
• The chart shows an example of a customized curve 6(OD):5(SYS) that does not exist in the standard curve options. If the outdoor
temperature reaches 30ºF, the system target will be 145ºF.
• Remember that the Offset, Min Target, and Max Target apply to all reset ratios including the customized reset ratio ones.
-- SET SYS TEMP.1 -
120 F
[
]
BACK SAVE
-- SET SYS TEMP.2 -
170 F
[
]
BACK SAVE
-- AT OD TEMP.1 ---
60 F
[
]
BACK SAVE
-- AT OD TEMP.2 ---
0 F
[ ]
BACK SAVE
Outdoor Temperature (in °F)
70
60
50
40
20
30
0
-10
10
-20
120
140
130
150
160
170
180
100
110
W
ater
T
emperature (in °F)
Custom Reset Ratio
Point1: System=120°F
Oudoor=60°F
Point2: System=170°F
Oudoor=0°F
Point1
Point2
Customized Reset Ratio
Max Target
Min Target
seQ and MoV target offset
Adjustable from 40
º
F/22
º
C - (-40
º
F/-22
º
C)
Default: 0
º
F/0
º
C
Button:
MENU/<SEQ Setting>/<Outdoor Reset>/Offset
SEQ
Button:
MENU/<MOV Setting>/<Outdoor Reset>/Offset
MOV
• The Offset setting lets you vertically shift the starting points of the Reset Ratio curves.
This means that, regardless of the Outdoor temperature or the Reset Ratio, when the
Offset setting is changed, that change is directly added to or subtracted from the calculated
temperature. For example, if the Set Point temperature was 130°F and the Offset was
changed from 0°F to 10°F (an increase of 10°F), then the Set Point temperature would
increase to 140°F (130°F + 10°F).
-- TARGET OFFSET ---
+0 F
[
]
BACK SAVE
• The Offset setting does not change the ratio selection. For instance, with 1.00 (OD):1.00
(SYS) Reset Ratio, the System water temperature will always increase one degree for
each degree change in the Outdoor temperature. What the Offset does is add or subtract a
constant temperature value. (See Understanding Operation Concept on page
• The Minimum and Maximum Target will take precedence over the Offset. That is, if the
Max Target was set to 180°F and the Offset was set to 20°F. If the set point was 170°F, the
new calculated set point based with the Offset will not exceed 180°F.
• If required:
Adjust the Water Offset in mild weather
. If the ambient building
temperatures are too warm in the mild weather, decrease the Target Offset. If the ambient
building temperatures are too cold in the mild weather, increase the Target Offset. The
rule of thumb for baseboard radiation is to change the Offset 4°F for every 1°F you wish to
change the building temperatures. In radiant heat applications, change the Offset 1°F or 2°F
for every 1°F you wish to change the building temperature.
Outdoor Temperature (in °F)
70
60
50
40
20
30
0
-10
10
-20
120
140
130
150
160
170
180
100
110
W
ater
T
emperature (in °F)
Target Offset
Offset=10°F
Reset Ratio=1.5 : 1.0
Reset Ratio
Max Target
Min Target
Reset Ratio + 10F Offset
Min Target=120°F
Max Target=170°F
seQ and MoV outdoor cutoff
Adjustable 20
º
F/-7
º
C - 100
º
F/38
º
C, On
Default: 70ºF/21ºC
Hold Button:
MENU/<SEQ Setting>/Set Point/Outdoor Cutoff
in Set Point
Hold Button:
MENU/<SEQ Setting>/<Outdoor Rst>/Outdoor Cutoff
in Reset
• In Outdoor Reset mode, Outdoor Cutoff will always exist. However, in Set Point mode, if
the outdoor sensor is installed, the Outdoor Cutoff screen will automatically appear after the
temperature Set Point has been selected.
-- OUTDOOR CUTOFF --
70 F
[
]
BACK SAVE
• When the outdoor temperature falls to the adjustable Outdoor Cutoff temperature, the SQ-Elite-MV will control the outputs
,
whether those outputs are multiple boiler stages or a motorized valve, to hold the calculated temperature.
• When the outdoor temperature rises to the Outdoor Cutoff plus a 2°F differential, the SQ-Elite-MV will turn all boilers off and
close the motorized valve. The System relay and any other stage pump or valve relays that were energized will remain energized
for the Run-On delay.
• The Outdoor Cutoff can be set to
ON
where the System Relay will run regardless of the outdoor temperature.
