Overview of Primary Product

Part Number 550-141-186/0914

LGB 3ERIES'AS&IRED"OILER"OILER-ANUAL
7

Pressure test before connecting gas piping and electrical supply.
 Refer to Figures 11a and 11b for control tapping locations. Install:
a. Boiler drain (not supplied).
b. Water pressure gauge — for test only. Be sure gauge can handle test pressures. See
Step 3.
2. Plug remaining tappings.
**
Left end section tappings
2c
Boiler assembly — pressure test
 &ILLBOILER6ENTALLAIR&ORMORETHANMINUTESPRESSURETEST
a. Steam boilers between 45 - 55 psig.
B 7ATERBOILERSTIMESMAXIMUMWORKINGPRESSURESTATEDONCASTINGSANDBOILER
nameplate.
No controls
installed
DO NOT pressure test with any controls installed. Damage to control can
occur.
Do not
leave boiler
unattended
Do not leave boiler unattended. Cold water fill could expand and cause
excess pressure, resulting in severe personal injury, death or substantial
property damage.
Tapping Size
Inches
Steam Boilers Water Boilers
(note 4)
C1 1
1
/ 4 Boiler drain Boiler drain
D1 & D2
1
/ 2 Gauge glass
(note 3)
--
E1 & E2 1 Low water cutoff
(note 3)
Optional low water
cutoff
E1 1 Pressure
operating & limit
controls and
pressure gauge
Limit control
(note 2)
F1 1 -- To expansion tank or
automatic air vent
(note 2)
G1
3
/ 4 -- Operating control
(note 2)
H1 & H2
(note 1)
3
/ 8 Tri-cock --
J1 2 Steam relief valve
& skim tapping
Water relief valve &
skim tapping
K1
1
/ 2 -- Combination pressure
& temperature gauge
(note 2)
M1 & M2 1 Optional low water
cutoff
(note 3)
Optional low water
cutoff
M1 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.