Weil-McLain 550 MBH Nstallation And Operation Manual page 54

®
SlimFit Series 3
Field wiring
G. External limits –
MANUAL
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
manually reset using the procedure given in this manual. See drawing at right
and wiring diagram (Figure 52, page 60).
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.
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 burner
on limit opening, then automatically restart 150 seconds after the limit closes.
2. See drawing at right and wiring diagram (Figure 52, page 60).
H. 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: 24 VAC or less; 0.5 amp or less.
54
COMMERCIAL CONDENSING GAS
OPTIONAL
OPTIONAL
(SlimFit control module, top left)
—
-
FIRED WATER BOILER
(continued)
(SlimFit control module, left side)
See Figure 52, page 60 for details
(SlimFit control module, left side)
See Figure 52, page 60 for details
See Figure 52, page 60 for details
Boiler Manual
Part number 550-100-168/0516