20
Series 49
Installation, Operating & Service Instructions
111368-04 - 1/22
Near Boiler Piping
1. Evaluate existing steam system.
Single most important factor in determining
expected life cycle of a steam boiler is the amount
of fresh water added to boiler during operation.
Fresh water brings minerals and oxygen into the
boiler. These contaminants greatly accelerate
corrosion of cast iron boiler sections.
Assure all system radiators, piping and vents are
absolutely leak tight.
A. When a steam boiler is installed in an
existing system, ALL air vents should be
replaced at the same time. This assures
the new boiler will not be compromised by
existing system leaks.
B. If system contains hidden supply or return
piping (hidden behind walls, buried in
concrete, etc.) pressure test this piping to
assure there are no leaks.
2. Repair any leaks in the system.
3. Install accurate water meter with counter on fresh
water supply to boiler.
4. Remove parts carton from boiler crate.
5. Install relief valve (spindle must be in vertical
position) into tapping on boiler right side using
nipple and elbow supplied. See Figures 3-4 and
3-5, 3-6, and Table 3-7.
DANGER
• Pipe relief valve discharge to a safe location.
• Do not install any valves between boiler and
relief valve.
• Do not install any valves between relief valve
and discharge.
• Do not move relief valve from factory location.
• Do not plug relief valve discharge.
• Do not install a relief valve with a setting greater
than 15 psi.
!
6. Install drain valve into tapping on boiler left side
using 2 x 3/4 bushing provided. See Figures 3-4,
3-5, 3-6 and Table 3-7.
7. See Figure 7-2 for near boiler piping of Hartford
Loop.
7
Steam Piping
(continued)
Indirect Water Heater
All Series 49 boilers are equipped with tappings to
permit connection of an indirect water heater (IWH).
See Appendix B for installation.
WARNING
• Pipe discharge of relief valve to a location
where water or steam will not create a hazard or
cause property damage if the relief valve opens.
• End of discharge pipe must terminate in an
unthreaded pipe.
• If relief valve discharge is not piped to a drain it
must terminate at least 6 inches above floor.
• Termination of the relief valve discharge piping
must be in an area where it is not likely to
become plugged by debris or subjected to
freezing.
!
