heat-timer Mini-MOD User manual

C O R P O R A T I O N
R
20 New Dutch Lane, Fairfi eld, NJ 07004 973-575-4004 • Fax [phone] • http://www.heat-timer.com
Description:
A Multiple-Boiler Modulating Control for Hydronic Heating
Systems Based on Outdoor Reset or a Set Point. The Mini-
MOD Control provides buildings with comfortable, even heat,
while maximizing fuel savings. In addition, it incorporates many
additional features and fl exibilities that can be customized to each
application’s unique characteristics.
•
Hydronic Heating using Outdoor Reset or Set Point. The
Mini-MOD control is designed to modulate multiple hot water
boilers. It can operate based on Outdoor Reset or a Set Point.
Each of the options has a set of pre confi gured, but adjustable
settings to meet the precise needs of each heating application.
•
Multiple Rotation Options. The Mini-MOD can rotate the
lead boiler to promote even wear on each boiler. It has three
rotation options; Timed rotation that is adjustable from One
hour to 60 Days, Manual rotation, and Last-On/Last-Off.
• Current Voltage Signal Modulation. Each of the outputs can
be confi gured independently. That is, a single Mini-MOD can
control multiple boilers different modulation requirements.
•
Adding Boilers. The Mini-MOD controls up to four boilers.
However, it can be connected to up to two additional Mini-
Extension panels, each with 6 stages. This allows the Mini-
MOD to modulate and manage up to 16 total boilers.
•
Parallel or Normal Modulation. An advanced PID logic has
been developed to provide an effi cient, smooth, and adjustable
modulation that can fi t most applications whether the boilers
are to sequence normally, one after the other, or in parallel.
With numerous confi gurable parameters like; Last Stage Hold
and Soft-Off to eliminate the lead boiler short cycling; Lag
Delay to eliminate lag boilers short cycling. The PID logic can
be adjusted to meet your specifi c heating application.
• System Output with Adjustable Run-On Delay. The Mini-
MOD has a System Output relay the can be confi gured to run
a system pump or combustion air damper. The relay can be
adjusted to operate during boiler operation or when below a
specifi ed Outdoor Cutoff.
• Digital Display. The Mini-MOD’s bright graphical digital
display names each system parameter in plain English and
shows its precise value. The easy to follow menu system allows
users to quickly make changes to any system setting without
having to learn any codes or keyboard commands. The new
brightly lit LCD display can be viewed from a distance in
dimly lit boiler rooms.
•
Communicate with EMS (Energy Management Systems) The
Mini-MOD with its built-in Shutdown and Prove inputs, is
capable of connecting to and being controlled by an EMS or
other controller.
•
Day and Night Schedule. The control has an adjustable Night
Setback setting to help reduce fuel consumption. The built-
in schedule can be used to customize the operation for even
further temperature control and fuel savings.
•
Boost. To bring a building quickly back to comfortable
temperatures after the cooler night period, the control has a
built-in Boost feature. The Boost allows the system to rise to
an increased temperature for a period of time.
•
Standby Boilers. Each boiler can be set individually to be
automatically operated, fully on, manually adjusted, off, or be
considered a Standby boiler. The Standby boiler option puts
the boiler in as a backup with an adjustable standby delay. This
feature is great for less effi cient boilers that can be used in
periods of high demand.
• Domestic Hot Water. It can be confi gured with Domestic Hot
Water call option. It will increase system water temperature
when Domestic Hot Water is needed. In addition, it allows for
optional priority of the domestic hot water over heating.
HYDRONIC MODULATING SEQUENCING CONTROLS
With • Modulate 4-Boilers using PID Logic • Parallel or Normal Modulation
• Sequence Boilers based on Reset or Set Point • Domestic Hot Water with Priority Option
• Outputs 4-20mA, 0-10V, 0-5V, 2-10V, and 1-5V Signals • Add more Boilers using Mini-Extensions up to 16 Boilers
Mini-MOD and Mini-Extension
users to quickly make changes to any system setting without

C O R P O R A T I O N
R
20 New Dutch Lane, Fairfield, NJ 07004 973-575-4004 • Fax [phone] • http://www.heat-timer.com
Features:
• Built-in Outdoor Reset or Set Point - That, combined with the PID sequencing makes the Mini-MOD the control of choice for a
variety of Hydronic applications.
• Minimum and Maximum System Temperature Adjustment - Another safety feature that adds to boiler and system protection.
The Minimum Temperature should be set to manufacturer’s suggested minimum boiler temperature. When in Reset Mode, the
Maximum Temperature is to protect system components from excessive heat.
• Multiple Rotation Options - The Mini-MOD will rotate boilers using a variety of options. Either based on Time; ranging from
1 hour to 60 days in one hour increments, Last-On rotation; allows for the first boiler to fire to be the first boiler to turn off, and
finally, manual rotation.
• Standby Boiler with Delay - Now you can set individual boilers to be either continuously On, Off, or adjusted manually to a
specific modulation percent in addition to the Automatic option. In addition to the capability of Standby boiler, the Mini-MOD
includes an adjustable Standby Delay.
• Adjustable Pump Delay. - Allows the System Pump an additional Run-On time to disburse residual heat in boilers.
• Normal and Parallel Modulation - Depending on the types of boilers the Mini-MOD is to control, it allows for two modes
of modulation. Normal modulation will add boilers as more energy is needed. However, Parallel modulation will benefit high
turndown ratio and lower water content boilers.
• External Setback/Scheduling - External Setback signal acceptance has been provided as an option for applications that are not to
follow a predetermined schedule. In addition, an adjustable Day/Night schedule has been provided primarily for building heating.
• Individual Boiler Modulation Adjustment - Each Boiler controlled by the Mini-MOD has a set of configurable settings that
allows it to respond differently from the rest. A very beneficial feature when controlling different sizes or models of boilers.
• Domestic Hot Water Priority Option - On a DHW Call the Mini-MOD will increase system temperature. Depending on the
Priority setting, the Mini-MOD will either dedicate all output to domestic hot water alone or in addition to heat (leaving system
pump running during DHW call).
• Featured Adjustments: ◦ Lag Delay - Helpful in reducing lag boiler short cycling, it allows the lag boiler an adjustable period of
time before starting.
◦ Last Stage Hold - A temperature add-on to the Set Point that is applied only to the lead boiler to
eliminate its short cycling. A helpful when one boiler at low fire is too large in light load conditions.
◦ Soft-Off Delay - Providing an additional on period of time to boilers before turning off, this feature
help stabilize operation output.
◦ Purge Delay - An adjustment to match boiler pre-purge for better control.
• Built-in Prove and Shutdown - The Prove can be used to check the status of other equipment, such as the end switch on a
combustion air damper prior to firing the boilers. Furthermore, Shutdown can be activated from any safety control feed back.
• Security - The Mini-MOD has an integral programming switch that can only be accessed when wiring cover has been unlocked
and removed.
Item Description Part #
Mini-MOD 926710-00
Mini-Extension 926712-00

C O R P O R A T I O N
R
20 New Dutch Lane, Fairfield, NJ 07004 973-575-4004 • Fax [phone] • http://www.heat-timer.com
MINI-MOD PANEL
ISO 9001:2000
CERTIFIED
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
12
RUNPROGRAM
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 12VA MAX
INPUT RATINGS:
USE COPPER CONDUCTORS ONLY
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
345678910 1112 1315
14 17
16 18 22
20 19 2124
2329
25 27 26 28 32
3031
LN
-+
+
TT
OORS-485
mA
GNDVLT
SYSABCD
PWR
CUR/VLT
A
-+
+
mA
GNDVLT
-+
+
mA
GNDVLT
-+
+
mA
GNDVLT
+
mA
TEMP
OUTDOOR
OO
TEMP
SYSTEM
SHUTDOWN
/SETBACK
EXTENSION
MODULE
CUR/VLT
B
CUR/VLT
C
CUR/VLT
D
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PROVE
/DHW
The digital display shows the system status, set point
,lead stage <in brackets>, and status of each stage.
To view and adjust settings, press the appropriate buttons.
120VAC Power
Four N.O. Boiler startup relay
outputs. Each is wired in series
with each boiler's limit circuit.
System Output controls
pumps, valves, or other
system components.
Four modulation outputs can be 0-5V,
0-10V, 1-5V, 2-10V, or 4-20ma. Go to
Startup Menu to determine the type of
output for each stage.
LED indicates the
associated relay status.
Buttons function is presented on
Bottom Row of display.
When connecting Outdoor and System
Sensors, no Polarity is observed.
Prove terminals must be connected
for Mini-Mod to operate boilers.
Connect Extension panels to
add additional stages using
a 6 pin phone line only (cable
provided with Mini-Extension).
Program Switch to restrict access to
function changes. This switch is
covered with Wiring Enclosure.

C O R P O R A T I O N
R
20 New Dutch Lane, Fairfield, NJ 07004 973-575-4004 • Fax [phone] • http://www.heat-timer.com
056031-00 REV A
Specifications:
Voltage Input: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 VAC 60 Hz
Power Consumption: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 VA Max
Operating Temperature: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20°F to 130°F
Operating Humidity: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20% to 80%
Dimensions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11"W x 9" H x 3 ¾
Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.5 pounds
Mini-MOD Specifications:
Lead Stage Rotation: . . . . . . . . . . . . . . . . . . . . . . . . . . Time ( 1 to 1440 Hours (60 days)), Manual, Last-On
Pump Output: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 N.O. S.P.S.T
Boiler Modes: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto, Manual, Standby, On, Off
Standby Time: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 to 60 minutes
Modulating Output Types: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20mA, 0-5V, 0-10V, 1-5V, 2-10V
Output Relay Ratings: . . . . . . . . . . . . 1 Amp inductive, 6Amp resistive at 120 VAC 60 Hz, 15A total for all circuits
Add-On Mini-Extension Panels: . . . . . . . . . . . . . . . . . . . . . . . up two Mini-Extension Panels using RS485
Ignition Point %: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 to 50%
Modulation Start Point %: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 100%
Modulation Modes: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Normal or Parallel
Temperature Display: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fahrenheit or Celsius.
Display: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Graphical Alphanumeric (7 rows x 21 char. each)
LED: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 System Output relay, 4 Boiler Output relays
Sensor Ranges: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outdoor temperature sensor - minus 35°F to 250°F
Heating system sensor - minus 35°F to 250°F
Outdoor Cutoff Range: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20°F to 100°F, ON and OFF
Reset Ratio Range: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1:4) to (4:1) (Outdoor : System Water)
Offset Adjustment: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . minus -40°F to plus 40°F
Minimum Water Temperature: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70°F to 170°F
Maximum Water Temperature: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90°F to 240°F
Domestic Hot Water: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . with Priority or without Priority
Pump Run-On: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 60 minutes
Purge Delay: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0 to 10.0 minutes
Lag Delay: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 60 minutes
Last Stage Hold: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 30°F
Schedules: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Day and 1 Night (Setback) settings per day
Night Setback: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°F to 75°F
Power Backup: . . . . . . Lithium coin battery, 100 days minimum 5 year replacement (Maintains Clock in power outages).
External Inputs: . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shutdown Input, and Prove Input. (Dry Contacts Only)
Season: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Winter and Summer.
Mini-Extension Specifications:
Extension Numbering: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Toggle Switch A or B
LED: . . . . . . . . . . . 1 Power (Dual Color Red/Green), 1 Communication, 6 Boiler Output relays(Dual Color Red/Green)
Boiler Outputs: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 N.O. S.P.S.T.
Modulating Output Types: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20mA, 0-5V, 0-10V, 1-5V, 2-10V
Output Relay Ratings: . . . . . . . . . . . . 1 Amp inductive, 6Amp resistive at 120 VAC 60 Hz, 15A total for all circuits
Connection to Mini-MOD and another Mini-Extension: . . . . . . . . . . . . . . . . . . . . . . . . Two RS485