Controls And Accessories; Piping For Water Units - Slant/Fin EUTECTIC EC-13A Installation And Operating Instructions Manual

EUTECTIC EC-10
The opening size recommendation just given is for guidance
only. It is the installer's responsibility to provide air for combus-
tion and ventilation to all appliances, under all operating condi-
tions, for each installation. See CSA B139, latest edition,
Section 7 for more specific details.
INSTALLING CONTROLS AND ACCESSORIES
ON BOILER UNITS
Notes:Jacket must be installed on boiler units prior to
installation of trim.
WATER BOILER TRIM, see page 2, figures 1 and 2 for tapping
locations.
WATER PIPING FOR HOT WATER HEATING BOILERS
I. CIRCULATING SYSTEM
A. FORCED CIRCULATION hot water heating system: Use
the top tapping as supply tapping, and use the rear bot-
tom tapping for the return.
B. A FLOW CONTROL VALVE will prevent gravity circulation
and is required when an external tankless heater, an indi-
rect water heater or multiple circulators are installed.
II. AIR CONTROL SYSTEMS
A. DIAPHRAGM-TYPE COMPRESSION TANKS are used to
control system pressure in an AIR ELIMINATING SYS-
TEM: an automatic air vent is used to REMOVE air from
the system water. (See figure 4)
If system pressure needs further control, add an addi-
tional tank or install a larger capacity tank.
The automatic air vent should be installed in the top of
the boiler, as in figure 4 and at radiation high points.
32mm (1-1/4")
NPT Supply
Figure 4. Air Eliminating System or Air Collecting System. Pipe off the relief valve and drain outlet to a
safe place.
B. CONVENTIONAL COMPRESSION TANKS (non-
diaphragm type) are used to control system pressure in
an AIR COLLECTING SYSTEM. Within the system, after
initial start-up and venting, air is collected in the tank and
acts in contact with the water to control pressure. Air is
not vented from this system except at radiation high
points.
If system pressure needs further control, add another
tank in parallel with the original tank or install a large
capacity tank. Locate the tank at the inlet end of the
pump near the boiler.
C. HOT WATER RADIATION VENTING - Manual air vents
should be installed at the top of all "drops" (where piping
goes downward). Air must be vented or purged from all
zone lines to permit proper system heating.
D. PUMP LOCATION - Locating low-head pump(s) on return
to boiler is only acceptable in residences of one or two
stories. The pump location shown in figure 4 is required
in large, multi-story building installations, especially
when high-head pumps are used and is also recom-
mended for all applications.
IMPORTANT: Hot water heating systems containing high water
volume, such as would occur with cast iron radiation, require
special care with air elimination.
The circulator should be located on the boiler supply pipe and
the expansion tank and air scoop should be located near the
pump suction. Use the alternate circulator location on return for
low-head pumps and one or two story buildings ONLY.
355mm
(13-31/32")
Relief valve
19mm (3/4")
195mm
(7-11/16")
38mm (1/2") NPT
Tapping for Feed
Valve and
Expansion Tank
32mm (1-1/4") NPT
return tapping
7