Weil-McLain Evergreen EVG 220 Manual page 54

®
gas
Field wiring
C. 120 VAC to Boiler Circulator –
Terminal Strip P8 on Pump/Comm Board (control tray, left side)
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
exchanger.
D. Inputs 1, 2 and 3 (tstats, end switches, etc.) –
Terminal Strip P11 (input 1) & Terminal Strip P15 (inputs 2 & 3) (EVG control module, left side)
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 65, page 59).
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 58 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 78 and page 79 for more information on the
setup and selection of operating conditions.
Thermostats
circuits (Input1, Input2 and Input3 in Figure 65, page 59) 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 P11 Pin 2 (see Fig-
ure 65, page 59). Do NOT exceed total amp draw per thermostat.
– 54 –
-
fired water boiler
(see wiring diagram, Figure 65, page 59)(continued)
REQUIRED
®
boiler to ensure proper flow through the heat
DO NOT
— supply 24-volt power to the thermostat
— 220/299/300/399 Boiler Manual
As needed for systems
Zone valves
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.
Thermostat anticipator setting
See Figure 65, page 59 for details.
See Figure 65, page 59 for details.
— If using 3-wire zone valves, use
— 0.1 amps.
Part number 550-100-131/0120