34
Multi-MOD Platinum with Space and Scheduling Installation and Operation Manual
HT# 059299-00
A
MAxIMuM TARGeT
Adjustable from 90ºF/32ºC to 240ºF/115ºC
Default: 240ºF/115ºC
PReSS TO SeleCT:
/<System Settings>/<More Settings>/Max Water Temp
• The Maximum Target is the highest water temperature the control
will circulate through the heating system . It is used to protect system
components from excessive hot water temperatures .
• When using an in-floor radiation system, the Maximum Target should be
set according to the tubing or floor manufacturer’s specification .
-- MAXIMUM TARGET --
240 F
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WARNING
The limits set on the boilers
MuST
be set considerably
higher than the Multi-MOD's Set
Point for the following reasons:
• The System sensor is located
in the common header some
distance from the boilers .
Therefore, the temperature in
the header will be lower than
that in the boilers .
• In addition 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
temperature drop experienced
in the piping .
---- SYSTEM RUN-ON ---
0min
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SYSTeM RuN-ON
Adjustable from 0 to 360 minutes
Default: 0 minutes
PReSS TO SeleCT:
/<System Settings>/Sys Run-On
• The System Run-On delays turning off the system pump to help disperse
residual stage energy into the system .
• The System Run-On starts after the last Stage output is turned off when
no outdoor sensor is available .
• When an outdoor sensor is available, the run-on starts when any of the
Outdoor Cutoff, off-season, or Shutdown starts .
• The
System output relay will remain active whenever the outdoor
temperature is below the Outdoor Cutoff in heating . However, when the
outdoor temperature rises 2°F above the Outdoor Cutoff, the System
output will remain energized for the Run-On period before turning off .
SeTBACk
Adjustable from 0F°/0C° to 80F°/44C°
Default: 0F°/0C°
PReSS TO SeleCT:
/<System Settings>/<More Settings>/Setback
• The Setback lowers the temperature/pressure target when less load is
required or during the Night Schedule .
• In Heating mode the Setback value is subtracted from the target .
However, it is added to the target when in Cooling mode .
• The Setback is triggered in one of two ways, when a dry-contact input is
connected to the EMS terminals . See "Setback Wiring" on page 20 .
• Also, the Setback is triggered during the Night Schedule settings . See
"Schedules" on page 42 .
--- SETBACK ---
0 F
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BOOST AND eARlY SHuTDOWN
Off, Vari, Vari+eSD
Default: Vari
Vari is adjustable from 0F°/0C° to 60F°/33C°
Default: 0F°/0C°
PReSS TO SeleCT:
/<System Settings>/<More Settings>/Boost Mode
• The Vari-Boost returns the building to day ambient temperatures after the
cooler Night Schedule (Setback) period much faster . It accomplishes this
by running elevated water temperatures for a calculated period based on
the #1 Day Time schedule and the outdoor temperature .
• If no Space Average exists, the Boost ends at the #1 Day Time .
• If Space Average exists, the Boost ends when the Space Average
reaches the Day Target . If the Day Target was not reached by the #1 Day
Time, the Boost may extend up one hour into the Day schedule .
--- BOOST MODE ---
Off
Vari
Vari+ESD
BOOST ADJUSTMENT
+
0 F
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