22
Heat-Timer Corp.
operatIng settIngs
prograM cHange settIngs
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.
PROGRAM
RUN
alert
DO NOT turn power off to the
SQ-Elite-MV when in Summer.
If you do so, the battery will
run down and will have to be
replaced. Instead switch to
Summer.
---- SEASON ---
Winter
Summer
BACK SAVE
season
Winter, Summer
Default: Winter
Hold Button:
MENU/Season
• The SQ-Elite-MV will turn all boiler relays off when it is in Summer setting. In addition,
the motorized valve MOV Close relay will energize for 6 minutes to guarantee valve
closure. The Message Display Line will display
Summer
and
Valve Close
to show
status.
However, a DHW call will bring boilers back on if needed.
• When in Winter, the SQ-Elite-MV will activate the System relays whenever the outdoor
temperature falls to or below the respective Outdoor Cutoff setting. In addition, it will begin
heating whenever the system temperature falls below the Set Point Temperature.
• When the season is over, it is a good practice to switch the SQ-Elite-MV Season setting.
This will allow DHW calls to operate the boilers when needed.
seQ and MoV reset ratIo settIngs
Each of the boiler loop (SEQ) and motorized valve loop (MOV) has their own reset ratio
settings that can be configured independently from each other.
---- 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
Outdoor Temperature
W
a
te
r
T
e
m
p
e
ra
tu
re
70
40
50
60
130
120
110
100
1:4
1:1
4:1
Colder
Warmer
seQ and MoV reset ratIo
Custom, 1(8.00ºOD : 1.00ºSys) to 12(4.00ºOD : 1.00ºSys) Default: 1(1.00ºOD : 1.00ºSys)
Hold Button:
MENU/<SEQ Setting>/<Outdoor Rst>/Reset Ratio
SEQ
Hold Button:
MENU/<MOV Setting>/<Outdoor Rst>/Reset Ratio
MOV
• The Reset Ratio determines how the System water temperature will vary with outside
temperature changes. With any of the ratios, the colder it becomes outside, the hotter the
temperature of the system water. (See Understanding Operation Concept on page
• With a 1.00 (OD):4.00 (SYS) ratio, the System water temperature (SYS) will increase
rapidly as the outside temperature falls, hitting the Maximum of 240°F at 35°F outside
temperature. With a 4.00 (OD):1.00 (SYS) ratio, the System water temperature (SYS) will
increase slowly as the outside temperature falls. Even at -30°F, the system water will only
be 125°F, and at 22°F outside, the system water will be 112°F. Such a low Reset Ratio
might be used in radiant floor heating applications.
• In most baseboard heating applications, a 1.00 (OD):1.00 (SYS) setting is a good place to
start. With a 1.00 (OD):1.00 (SYS) ratio, for every degree the outside temperature falls, the
system water temperature is increased one degree.
• If required:
Adjust the RESET RATIO in cold weather.
If the ambient building
temperatures are too cold in cold weather, move the ratio to a higher selection. That is, if
1.00 (OD):1.00 (SYS) was initially selected, change the selection to 1.00 (OD):1.25 (SYS). If the building temperatures are too
warm in cold weather, move the ratio to a lower selection. That is, if 1.00 (OD):1.00 (SYS) was initially selected, change the
selection to 1.25 (OD):1.00 (SYS).
• After selecting the Reset Curve, pressing the SAVE button will switch to the Outdoor Cutoff setting option.
seQ and MoV custoMIzed reset ratIo
Hold Button:
MENU/<SEQ Setting>/<Outdoor Rst>/Custom
SEQ
Hold Button:
MENU/<MOV Setting>/<Outdoor Rst>/Custom
MOV
• For situations where the available reset ratios do not provide the perfect building heat-loss equilibrium, the customized option can
be used. It provides the user with the capability of assigning two points on the reset ratio diagram and use the line that connects
the two points as the customized reset ratio curve. Each of the two points will need a specific System and Outdoor Temperature to
identify it on the diagram.
