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Part number 550-100-260/0520
60
ECO
®
Tec
GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
Field wiring (see wiring diagram, Figure 70, page 66) (continued)
A. 120VAC Power Supply – REQUIRED
1. Provide and install a properly-sized, fused disconnect or
service switch as required by applicable codes. (15-amp for
most cases.)
a. Use table at right to determine total load.
2. Connect properly sized 120VAC power wiring to
ECO
Tec boiler line voltage terminal block T1 as shown
at right.
3. If possible, provide a surge suppressor in the supply power
line. This will reduce the possibilities of control damage due
to line surges.
4. Must wire ground to this terminal to provide boiler
grounding. Failure to properly ground the boiler can lead
to abnormal operation and potential hazards.
Boiler & boiler pump
(combined load)
Output 1 . . . . . . .
(2.2 amps max)
Output 2 . . . . . . .
(2.2 amps max)
Output 3 . . . . . . .
(2.2 amps max)
Output 4 . . . . . . .
(2.2 amps max)
TOTAL . . . . . . .
2.5 amps
____ amps
____ amps
____ amps
____ amps
See
Figure 70, page 66
for details
– As needed for systems
Note
: Input/Output 1 & 4 are unassigned/ not available in Combi models.
1. Output 1: (Heat Only) T2: 4, 5, & 6
2. Output 2: T2: 7, 8, & 9
3. Output 3: T3: 10, 11, & 12
4. Output 4: (Heat Only) T3: 13, 14, & 15.
5. Maximum load: 2.2 amps (use relay if circulator load is higher). See WARNING below.
6. These four outputs (Output 1, Output 2, Output 3, and Output 4) can
provide 120VAC to the following listed below:
A zone
circulator.
A system circulator.
A DHW circulator (used to circulate through an indirect tank).
An auxil
iary Item that must be energized during an input call, such as
an air damper.
7. When using inputs/outputs for heat/Indirect DHW demands, each input (Input 1,
Input 2,
Input 3, and Input 4
) controls its respective 120VAC output (Output 1,
Output 2,
Output 3, and Output 4
). Outputs are energized only when BOTH
conditions below are met:
a. The corresponding input indicates a call for heat/ Indirect DHW (i.e. contact
closure).
b. The PRIORITY assigned to the Input/Output pair is ACTIVE (i.e. the zone may
be calling but the pump won’t activate unless the boiler is currently running on
that system/priority).
The 3-way valve will operate for Combi models, activating Output 1 for
Combi DHW calls, and activating Output 4 for any Space Heating calls.
8. When using the inputs/outputs for the AUX PUMP/OUTPUT function, the output
is controlled by selectable conditions set up in the control.
a. Use the AUX PUMP/OUTPUT function for devices such as system pumps,
combustion air dampers, and other auxiliary equipment to activate when the
selected condition is met.
b. See page 91 and page 93 for more information on the setup and selection of
operating conditions.
:
The DHW aquastat can be connected to any one of the four
(4) input/output pairs for Heat Only models and Inputs 2 or
3 for Combi models. The selected input should be assigned to
PRIORITY 1 during the WIZARD setup or manually in the System
Settings menu for Heat Only models or Priority 2 for Combi models.
See
Figure 70, page 66
for details.
—
.
For circulators with higher amp ratings, install a circulator
relay or starter. Connect only the 120VAC coil to the circulator
terminals.
Combi models use Input/Output pairs 1 and 4 for 3-way valve operation and cannot be used for any
other purpose. Use Input 2 for Indirect DHW (if needed) and Input 3 for Space Heating applications.
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