Weil-McLain LGB-10, User Manual

Page: 13 / 36

Part Number 550-141-186/0100
13
• Installation • Start-Up • Maintenance • Parts
Figure 11b
Right end section tappings
Hydrostatic pressure
test
(continued)
No petroleum-
based chemicals
G2 G2
E3 E3
D3 D3
M3 M3
H3 H3
H4 H4
K2
K2
D4
D4
E4
E4
M4
M4
C2 C2
F2
F2
J2 J2
5" Return 5" Return
6" Supply 6" Supply
186-11b
4. Check for maintained gauge pressure and leaks. Repair if found.
5. Drain boiler and remove plugs from tappings used for controls and accessories.
Do not use petroleum-based cleaning or sealing compounds in boiler
system. Severe damage to boiler will result, causing substantial property
damage.
Repair leaks
at once
Leaks must be repaired at once. Failure to do so can damage boiler, resulting
in substantial property damage.
Tapping Size
Inches
Steam Boilers Water Boilers
(note 4)
C2 1
1
/
4
Boiler drain Boiler drain
D3 & D4 1
/
2
Gauge glass
(note 3)
--
E3 & E4 1 Low water cutoff
(note 3)
Optional low water
cutoff
E3 1 Pressure
operating & limit
controls and
pressure gauge Limit control
(note 2)
F2 1 -- To expansion tank or
automatic air vent
(note 2)
G2 3 /
4
-- Operating control
(note 2)
H3 & H4
(note 1)
3
/
8
Tri-cock --
J2 2 Steam relief valve
& skim tapping Water relief valve &
skim tapping
K2
1
/
2
-- Combination pressure
& temperature gauge
(note 2)
M3 & M4 1 Optional low water
cutoff
(note 3)
Optional low water
cutoff
M3 1 Firing rate control
(when used)
Firing rate control
(when used)
or Probe
low water cutoff
Notes:
1. Available on special request only.
2. Must be on same side as supply to system.
3. Must be on same side as steam equalizer piping.
4. Additional controls for water boilers may be placed in supply piping.