heat-timer Mini-MOD, Installation And Operation Instruction Manual

Page: 11 / 36

Mini-MOD & Mini-Extension Installation Manual 11
059040-00 C
WIrIng
WIrIng tHe poWer
(Terminals 1, 2)
• Bring the 120VAC 60Hz power wires through the bottom Knockout of the enclosure.
• Connect the hot line to terminal marked L.
• Connect the neutral line to the terminal marked N.
• Heat-Timer recommends installing a surge suppressor on the power source to the Mini-MOD.
WarnIng
class 1 voltages must enter the enclosure through a different opening
from any class 2 voltage wiring. Heat-timer recommends installing a
surge suppressor on the power source to the Mini-Mod.
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
1 2
RUN PROGRAM
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
3 4 5 6 7 8 9 10 11 12 13 15 14 17 16 18 22 20 19 21 24 23 29 25 27 26 28 32 30 31
L N
-
+ +
T T O O
RS-485
mA GND VLT
SYS A B C D PWR
CUR / VLT
A
-
+ +
mA GND VLT
-
+ +
mA GND VLT
-
+ +
mA GND VLT
+
mA
TEMP
OUTDOOR
O O
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
PROVE
/DHW
SHUTDOWN
/SETBACK
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
CAUTION : RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
/TSTAT
ENCLOSED
ENERGY
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99RA
Line
Neutral
120VAC
Power Source
WIrIng tHe sensors
WarnIng
connect the shield at the control terminal end and cut the shield wire at the sensor end.
systeM sensor WIrIng
(Terminals 27, 28)
• A Mini-MOD must be connected to a temperature sensor located in the common header.
• The Mini-MOD is designed to be connected to a HT #904250-00 temperature sensor for immersion in a ⅜ "
ID well (HT #904011-00 or equivalent). Contact the factory for additional temperature sensor options.
• Temperature sensor wires can be extended up to 500’ by splicing shielded
2-conductor cable (Belden #8760 or equivalent (#18/2)).
• Temperature sensors have no polarity. Connect the two wires from the sensor
to the Mini-MOD terminals marked SYSTEM TEMP 27, 28 .
• Connect the sensor shield to the circled terminal 28 with one of the sensor wires.
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
1 2
RUN PROGRAM
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
3 4 5 6 7 8 9 10 11 12 13 15 14 17 16 18 22 20 19 21 24 23 29 25 27 26 28 32 30 31
L N
-
+ +
T T O O
RS-485
mA GND VLT
SYS A B C D PWR
CUR / VLT
A
-
+ +
mA GND VLT
-
+ +
mA GND VLT
-
+ +
mA GND VLT
+
mA
TEMP
OUTDOOR
O O
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
PROVE
/DHW
SHUTDOWN
/SETBACK
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
CAUTION
: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
/TSTAT
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
System Sensor
Sensor Shiled
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
1 2
RUN PROGRAM
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
3 4 5 6 7 8 9 10 11 12 13 15 14 17 16 18 22 20 19 21 24 23 29 25 27 26 28 32 30 31
L N
-
+ +
T T O O
RS-485
mA GND VLT
SYS A B C D PWR
CUR / VLT
A
-
+ +
mA GND VLT
-
+ +
mA GND VLT
-
+ +
mA GND VLT
+
mA
TEMP
OUTDOOR
O O
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
PROVE
/DHW
SHUTDOWN
/SETBACK
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
CAUTION
: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
/TSTAT
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
Outdoor Sensor
Sensor Shiled
outdoor sensor WIrIng
(Terminals 25, 26)
• When Outdoor Reset is selected, the Mini-MOD will vary the system Set Point based on outdoor temperature.
• Whether in Set Point or Outdoor Reset modes, the outdoor sensor can be used as an Outdoor Cutoff. The Mini-
MOD will disable all boilers when the outdoor temperature is above the adjustable Outdoor Cutoff temperature.
This feature will automatically be activated when an outdoor sensor is connected.
• For an outdoor sensor use a Heat-Timer outdoor sensor (HT #904220-00).
• The sensor wires can be extended up to 500’ using shielded 2-conductor cable (Belden #8760 or equivalent (#18/2)).
• Temperature sensors have no polarity. Connect the wires from the outdoor sensor to the Mini-MOD terminals
marked OUTDOOR TEMP - 25, 26.
• Connect the shield to the circled terminal 26 with one of the sensor wires.
WIrIng tHe sHutdoWn, tstat, or setback
(Terminals 31, 32)
• The Shutdown will be available when selected as the Shutdown/Tstat/Setback mode from the Startup menu. See
"Shutdown/Tstat/Setback Mode" on page 18.. This will provide the user with a customizable Day/Night Schedule.
See "Day/Night Schedules" on page 25..
• The Shutdown feature can be used whenever it is desirable to turn off the Mini-MOD stage outputs from a remote
location or another controller (i.e. EMS input).
• The Tstat option, when selected from the Shutdown/Tstat/Setback startup menu, provide the capability of controlling
the operation of the Mini-MOD based on a thermostat input. See "Shutdown/Tstat/Setback Mode" on page 18. This
will provide the user with an adjustable Day/Night Schedule. See "Day/Night Schedules" on page 25..
• The thermostat will provide the Mini-MOD with a call for heat by shorting terminals 31 and 32.
• When the Shutdown input is enabled by closing the dry contact, or when the Tstat input is disabled by opening the
dry-contact, all active boilers will immediately modulate down to low for the Soft-Off period, then turn off.
• The System Output relay will remain active until the Run-On Delay expires and then it will turn off.
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
1 2
RUN PROGRAM
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
3 4 5 6 7 8 9 10 11 12 13 15 14 17 16 18 22 20 19 21 24 23 29 25 27 26 28 32 30 31
L N
-
+ +
T T O O RS-485
mA GND VLT
SYS A B C D PWR
CUR / VLT
A
-
+ +
mA GND VLT
-
+ +
mA GND VLT
-
+ +
mA GND VLT
+
mA
TEMP
OUTDOOR
O O
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
PROVE
/DHW
SHUTDOWN
/SETBACK
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
CAUTION : RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
/TSTAT
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
Shutdown,
T-Stat, or
Setback Signal