SVF 2000 User Manual

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Part number 550-100-252/0520

– 41 –

Field wiring See wiring diagrams, Figure 21, page 30 & Figure 23, page 32 (continued)

G. External limits – OPTIONAL

To cause MANUAL reset: Terminal Block P13 #1 & #2

Unity

control will require manual reset after circuit is interrupted

1. Remove factory-installed jumper and connect isolated contacts of external

limits across P13 pins 1 and 2 to cause the control to enter manual reset lock-

out if the limit circuit opens. The limit must close and the control must be

man

ually reset using the procedure given in this manual. See drawing at right

and wiring diagram (Figure 21, page 30).

The control will lockout when a limit in its manual reset circuit opens

(P13 pins 1 & 2). The control activates its alarm terminals and shuts

the boiler off. An operator (user or technician) must manually reset

the control to resume heating. Cycling power on and off will NOT

reset the control.

See Figure 21, page 30 for details.

To cause AUTOMATIC reset: Terminal Block P13 #3 & #4

Unity

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 burner

on limit opening, then automatically restart 150 seconds after the limit closes.

2. See drawing at right and wiring diagram (Figure 21, page 30).

See Figure 21, page 30 for details.

H. Alarm contacts – OPTIONAL

Terminal Block P16 #4 & #5

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.

See Figure 21, page 30 for details.

SVF

™

Series 1

COMMERCIAL CONDENSING GAS-FIRED WAT ER BOILER

— Advanced Manual

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Weil-McLain SVF 2000 Stainless Vertical Firetube (SVF) Boilers