Weil-McLain Evergreen 220 User Manual page 52

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GAS
Field wiring
1. Provides 120VAC to the boiler circulator at Pump/Comm Board P8 Terminals.
2. Terminals are: 1 (H), 2 (N), 3 (G).
3. Maximum load: 2.2 amps (use relay if circulator load is higher). See WARN-
ING above.
4. The boiler circulator (shipped loose with boiler) is used in the boiler loop
of the primary / secondary piping. Primary / secondary piping is required
to be used with the Evergreen boiler to ensure proper flow through the heat
exchanger.
1. Input 1 – Terminal Strip P11 – 4 & 5 (EVG control module)
2. Input 2 – Terminal Strip P15 – 1 & 2 (EVG control module)
3. Input 3 – Terminal Strip P15 – 3 & 4 (EVG control module)
4. These three inputs on each boiler can indicate a call for heat to the control
by means of a dry contact closure (thermostat, aquastat, or switch). (See
right and Figure 62, page 57).
5. The control provides inputs for up to three zones or three systems (priorities).
The control default setting is for three space heating zones tied to
PRIORITY 2, which is defaulted to FINNED TUBE BASEBOARD
system type.
6. For DHW applications, the aquastat can be connected to one of the three
input/output pairs. Take advantage of factory default settings by using PRI-
ORITY 1 for the DHW system. The default control setting for PRIORITY 1
is a direct-piped DHW system type.
7. The default control setting uses each input (INPUT 1, INPUT 2, and IN-
PUT 3) to control its respective 120VAC output (OUTPUT 1, OUTPUT 2,
and OUTPUT 3).
Use of 0–10VDC input for modulation disables Input 1 from creat-
ing calls for heat. See page 56 for instructions.
An input can be assigned to an AUX PUMP/OUTPUT function to
operate a system pump or interlock with a combustion air damper.
Inputs assigned for this function cannot be used for heat demand
operation. See page 76 and page 77 for more information on the
setup and selection of operating conditions.
circuits (Input1, Input2 and Input3 in Figure 62, page 57) or
attempt to supply 24 volts for any other application.
For thermostats that require a continuous 24-volt power
source, connect the common wire ("C") to
ure 62, page 57). Do NOT exceed total amp draw per thermostat.
– 52 –
-
FIRED WATER BOILER
(see wiring diagram, Figure 62, page 57)(continued)
REQUIRED
supply 24-volt power to the thermostat
— Boiler Manual
(control tray, left side)
As needed for systems
relays to provide dry contacts to the Control ther-
mostat connections. The zone valve end switches
of 3-wire valves carry 24 VAC from the valve.
Pin 2 (see Fig-
See Figure 62, page 57 for details
(EVG control module, left side)
See Figure 62, page 57 for details
— If using 3-wire zone valves, use
— 0.1 amps.
Part number 550-100-131/0715

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