Ultra Boiler Manual

Part number 550-100-440/0122
60
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
®
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1. Main header and Easy-Fit
®
Manifold pipe sizing.
a. New system — See page10.
b. Replacing boilers in an existing system — Without reducing
size, connect system supply and return lines. Install tees or
crosses for Easy-Fit
®
manifolds as shown in Figure60 orFig-
ure61. Size manifolds to handle total connected boiler output
as shown.
2. Provide connections in main header for Easy-Fit® manifolds as
close as possible to the midpoint of multiple boilers.
a. Use tees for four or less boilers, as in Figure60.
b. Use either tees (Figure60) or crosses (Figure61) for ve or
more boilers.
3. Manifold placement:
a. To alternate spacing for supply and return lines to boilers,
reverse the short-end and long-end of the manifolds as shown
in Figure60 andFigure61.
b. Return manifold must be on the return side of the main and
supply manifold must be on the supply side of the main. Draw-
ings in this manual show ow in system main from right to
le. For system owing le to right, reverse the locations of
the manifolds accordingly.
4. Connect from Easy-Fit® manifold branches to boiler supply and
return connections using copper or steel pipe, sized for the required
ow rate.
5. Provide a ow/check valve in the supply piping of each boiler as
shown in piping diagrams in this manual. Install an isolation valve
on the supply and return of each boiler as shown. Some local codes
may require the use of individual water level controls and limits
on each boiler when isolation valves are installed.
6. Install main system air eliminator and primary circulator in sup-
ply piping as shown in piping diagrams. Place expansion tank on
suction side of system circulator as shown.
7. Install system accessories as shown in drawings.
8. Piping recommendation drawings:
a. Figure60 andFigure61 show details of Easy-Fit
®
manifolds.
b. Figure62,page61 is a schematic piping drawing showing the
locations of typical boiler piping and system piping, including
limits and other devices oen required by local codes.
c. Figure63,page62 and Figure64,page63 are three-dimensional
piping drawings of typical multiple boiler installation.
d. Figure65,page64 shows recommended piping when an isolat-
ing heat exchanger is needed.
9. If desired, other primary/secondary piping arrangements can be
used.
When using isolation valves on each boiler, some codes
may require providing a low water control and additional
limit for each boiler. Consult local codes to determine
if omission of the individual boiler isolation valves
may allow the use of a single water level control and
additional limit for the entire multiple boiler system.
The U-Control module proves water level using a
dual temperature sensor installed in the Ultra heat
exchanger
. is will satisfy some code requirements for
low water cuto protection.
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Figure 60
Single-sided EZ-Fit Header connection
Figure 61 Double-sided EZ-Fit Header connection