Weil-McLain Evergreen EVG 70 Manual page 59

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Field wiring
To cause AUTOMATIC reset: Terminal Block P13 #3 & #4 (EVG control module)
EVG control will reset automatically after circuit is interrupted.
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 60, page 62 ).
H. Low water cutoff –
Terminal Block P12 (EVG control module)
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
provides a simple harness connection for the wiring.
b. Connect as shown at top right and in the control wiring diagram
( Figure 60, page 62 ).
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 –
Terminal Block P16 #4 & #5 (EVG control module)
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 notifi cation.
3. Contact electrical ratings: 24VAC or less; 0.5 amp or less.
J. Additional heat demand contacts –
Terminal Block P16 #6 & #7 (EVG control module)
1. The control module can be set to activate another heat source using its
additional 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 confi gure.
Part number 550-100-191/0917
as-fired water boiler —
(see wiring diagram, Figure 60, page 62 ) (continued)
Standard Equipment
OPTIONAL
70/110/155
See Figure 60, page 62 for details.
See Figure 60, page 62 for details.
See Figure 60, page 62 for details.
OPTIONAL
See Figure 60, page 62 for details.
Boiler Manual
59