Part number 550-100-131/0120
– 53 –
®
gas
-
fired
water
boiler
— 220/299/300/399
Boiler Manual
Field wiring
(see wiring diagram, Figure 65, page 59)(continued)
A. 120 VAC Power Supply –
REQUIRED
Terminal Block T1
(control tray, right front)
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. Suggested
fused disconnect or service switch sizing is 15-amp if
total load is 12 amps or less, 20-amp if total load is more
than 12 amps.
2. Connect properly sized
120 VAC
power wiring to
Evergreen
®
boiler line voltage terminal strip 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 ground-
ing.
Determine total load
Boiler & boiler pump
(combined load)
Output 1 . . . . . . .
(2.2 amps max)
Output 2 . . . . . . .
(2.2 amps max)
Output 3 . . . . . . .
(2.2 amps max)
TOTAL . . . . . . .
8.4 amps
____ amps
____ amps
____ amps
____ amps
See Figure 65, page 59 for details
B. 120 VAC Outputs 1, 2 & 3
–
As needed for systems
Terminal Strip P2
(EVG control module, right side)
1. Output 1: P2 Terminals 1 (H), 4 (N), 7 (G).
2. Output 2: P2 Terminals 2 (H), 5 (N), 8 (G).
3. Output 3: P2 Terminals 3 (H), 6 (N), 9 (G).
4. Maximum load: 2.2 amps (use relay if circulator load is higher). See WARN-
ING below.
5. These three outputs (Output 1, Output 2, and Output 3) 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 auxiliary item that must be energized during an input call, such as
an air damper.
6. When using inputs/outputs for heat/DHW demands, each input (Input 1,
Input 2, and Input 3) controls its respective 120VAC output (Output 1, Out-
put 2, and Output 3). Outputs are energized only when BOTH conditions
below are met:
a. The corresponding input indicates a call for heat/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).
7. 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 boiler is on/running.
b. See page 78 and page 79 for more information on the setup and selection
of operating conditions.
For Priority DHW Application
:
The DHW aquastat can be connected to any one of the three input/
output pairs. The selected input should be assigned to PRIORITY 1
during the WIZARD setup or manually in the ASSIGN INPUTS
menu.
See Figure 65, page 59 for details.
Output circuits are 120 VAC. If
an output is to operate a low
voltage circuit or must be an
isolated contact, use an isola-
tion relay.
CIRCULATOR POWER
—
The maximum allow-
able current for each circulator is 2.2 amps
at 120 VAC
.
For circulators with higher amp ratings, install a circulator re-
lay or starter. Connect only the 120-VAC coil to the
Evergreen
circulator terminals.
