Weil-McLain SGO 4 Series Manual page 17

SGO
OIL-FIRED NATURAL DRAFT STEAM BOILER — SERIES 4 —
Install boiler –
Figure 7
Control tapping
locations
(for use with
Table 3, page 16)
S1 A1 A2
E1
E2
U3
S2
B1
Front Section
A3 R U1
Back Section
Part number 550-142-330/0421
SERVICE TECHNICIAN ONLY — read and follow completely.
Semi-packaged and Knocked-down boilers only
Figure 8
Steam boiler controls with float-type LWCO (optional tankless heater
control)
L
SGO 3-5 tankless
heater control
location
P
SGO 6-9 tankless
heater control
location
Float-type low
water cutoff
H
Figure 9
Steam boiler controls with probe-type LWCO (optional tankless heater
control)
U2
Siphon
SGO-3 to SGO-5
tankless heater
control
B2
SGO-6 to SGO-9
tankless heater
control
Boiler Manual
(
continued)
Steam pressure
control
Steam pressure
gauge
Siphon
Gauge glass
and cocks
Drain valve
Steam pressure
Steam pressure
Probe-type
low water
cutoff
Gauge glass
and cocks
Drain valve
17