Operating Settings; Program Change Settings; Season; Set Point (Not Adjustable In Ems Mode) - heat-timer Mini-Extension Installation And Operations

16 Heat-Timer Corp.
RESET MODE
• When All-On is selected, the Mini-MOD will turn all boilers On to a 100% when System reads Short or Open and Outdoor is
below Outdoor Cutoff. When Outdoor reads Short or Open, the Mini-MOD will turn all boilers On to a 100%.
• When All-Off is selected, the Mini-MOD will turn all boilers Off when either System or Outdoor sensor reads Short or Open.
SET POINT MODE
• When All-On is selected, the Mini-MOD will turn all boilers On to a 100% when the System sensor reads Short or Open.
• When All-Off is selected, the Mini-MOD will turn all boilers Off when the System sensor reads Short or Open.
• The Outdoor Sensor Short or Open status will not affect the control operation in Set Point mode.

OPERATING SETTINGS

PROGRAM CHANGE SETTINGS

To be able to change the Mini-MOD 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 lock.

SEASON

Winter, Summer
Button: MENU/Season
• The Mini-MOD will turn all boiler relays off when it is in Summer setting. However, a
DHW call will bring boilers back on if needed. The Message Display Line will display
Summer to show status.
• When in Winter, the Mini-MOD will activate the Sys relay whenever the Outdoor
temperature (OD) falls to or below the Outdoor Cutoff setting. In addition, it will begin
heating whenever the System temperature (SYS) falls below the Set Point Temperature.
The Message Display Line will not display any season information when in Winter.
• When the heating season is over, it is a good practice to switch the Mini-MOD to
Summer setting. This will allow DHW calls to operate the boilers when needed.

SET POINT (NOT ADJUSTABLE IN EMS MODE)

Adjustable 70ºF - 250ºF
Button: MENU/Set Point
• The Set point is the temperature value the Mini-MOD will use to control the system.
• The Mini-MOD will increase, decrease or hold the modulation of the boilers to maintain
the system temperature around the Set point.
• The system can be expected to fluctuate around the set point. The amount of fluctuation
depends on the Modulation Mode, System Settings, and Stage Settings.
• If the EMS Mode was Enabled, the Set Point will be set by the EMS/BMS system and
will be available to be read but not changed on the display.

RESET RATIO

Adjustable 1.00ºOD : 4.00ºSys to 4.00ºOD : 1.00ºSys
Button: MENU/Set Point
• The Reset Ratio determines how the System water temperature (SYS) will vary with
Outside temperature (OD). With any of the ratios, the colder it becomes outside,
the hotter the temperature of the system water. The ratios are adjustable from 1.00
(OD):4.00 (SYS) to 4.00 (OD):1.00 (SYS). (See Understanding Operation Concept on
page 5)
• 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 24°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
Default: Winter
Default: 70ºF
Default: 1.00ºOD : 1.00ºSys
PROGRAM
------------- SEASON --------------
Winter
Summer
BACK
CAUTION
DO NOT turn power off to the
Mini-MOD when heating season
is over. If you do so, the battery
will run down and will have to
be replaced. Instead switch to
Summer.
------------ SET POINT ----------
70
F
[]
BACK
--------- RESET RATIO ----------
1.00 OD=4.00 Sys
1.00 OD=3.00 Sys
1.00 OD=2.00 Sys
1.00 OD=1.50 Sys
1.00 OD=1.25 Sys
1.00 OD=1.00 Sys
1.25 OD=1.00 Sys
1.50 OD=1.00 Sys
2.00 OD=1.00 Sys
3.00 OD=1.00 Sys
4.00 OD=1.00 Sys
BACK
RUN
SAVE
SAVE
SAVE