Weil-McLain Evergreen 220 User Manual page 54

™
GAS
Field wiring
AUTOMATIC
1. Remove factory-installed jumper and connect isolated contacts of external
limits across P13 pins 3 and 4 to cause the control to shut down the boiler on
limit opening, then automatically restart 150 seconds after the limit closes.
2. See drawing at right and wiring diagram (Figure 62, page 57).
H. Low water cutoff –
1. Install a low water cut-off when required.
2. Wiring Weil-McLain LWCO Kit:
a. When possible, use the Weil-McLain Low water cut-off kit listed in the
back of this manual. It includes a probe-type low water cut-off and pro-
vides a simple harness connection for the wiring.
b. Connect as shown at top right and in the control wiring diagram
(Figure 62, page 57).
c. The Weil-McLain Low water cut-off kit is included with the boiler.
3. Wiring another LWCO — must have isolated contact:
a. Other low water cut-offs can be used with the EVG only if the device uses
an isolated contact for the LWCO function.
b. Connect as shown at bottom right.
I. Alarm contacts –
1. The control's alarm dry contact (P16, terminals 4 and 5) closes when the
boiler enters manual lockout only.
2. Connect these terminals for remote alarm notification.
3. Contact electrical ratings: 24VAC or less; 0.5 amp or less.
J. Additional heat demand contacts –
1. The control module can be set to activate another heat source using its ad-
ditional heat demand dry contacts through terminal block P16 pins 6 & 7.
2. Connect these terminals to call for heat from the other heat source.
3. Contact electrical ratings: 24VAC or less; 0.5 amp or less.
4. Set the control to activate the heat demand contacts as needed.
5. See EVG Advanced Manual to configure.
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FIRED WATER BOILER
(see wiring diagram, Figure 62, page 57)(continued)
WHEN REQUIRED
(EVG control module, left side)
OPTIONAL
(EVG control module, top left)
(EVG control module, top left)
— Boiler Manual
(EVG control module, left side)
See Figure 62, page 57 for details
See Figure 62, page 57 for details
See Figure 62, page 57 for details
OPTIONAL
See Figure 62, page 57 for details
Part number 550-100-131/0715