Fulton Endura (EDR) Condensing Hydronic Boiler - Manual (Page 12)

© The Fulton Companies 2014
2-6
INSTALLATION
EDR-IOM-2014-0318
SECTION 2
Install Water Piping
All water supplies contain some solids, dissolved gases or dissolved minerals.
These may cause corrosion, deposition and/or fouling of equipment. To prevent
these contaminants from impacting boiler performance, valve operation and
general pipe longevity, each location must be analyzed and treated accordingly.
Adhere to the following for water piping installation (See Figure 3):
1. Isolation valves are recommended on both water connections for ease of
service.
2. Install piping so that the boiler is not supporting any additional piping.
3. Install manual purging valves in all loops and zones. Install a pressure-
reducing (automatic fi ll) valve in the cold water fi ll line to the boiler system.
Check that the proposed operation of zone valves, zone circulator(s) and
diverting valves will not isolate air separator(s) and/ or expansion tank(s)
from the boiler. Clearance from hot water pipes to combustibles must be at
least 6 inches (152 mm).
4. When used in conjunction with a refrigeration system, install the boiler
so that the chilled medium is piped in parallel with the boiler with
appropriate valves to prevent the chilled medium from entering the
boiler. If the boilers are connected to heating coils (located in air handling
units where they may be exposed to refrigerated air circulation) such
boiler piping systems must be equipped with fl ow control valves or other
automatic means to prevent gravity circulation of the boiler water during
the cooling cycle.
5. Include the following in the mechanical equipment in the hydronic
heating system:
» An automatic pressure activated water make up valve with back
fl ow preventer. It must be set to maintain required Net Positive
Suction Head (NPSH) for re-circulating pumps, a positive system
pressure at the highest point of at least 5-10 PSIG, and make up
water valve should be designed to add water to the system at the
outlet of the boiler and should not be fed directly into the boiler.
» Air removal equipment, including an air separator and automatic
breather valves, along with a functioning expansion tank . Each
must be designed to system specifi cations.
NOTE:

The upper water connection on the back of the boiler is the outlet
connection. The lower water connection on the rear of the boiler is the inlet
connection.
NOTE:

The Fulton Endura boiler does not require a primary/secondary fl ow
piping system. Although primary/secondary is an acceptable confi guration,
the boiler does not have a minimum return water temperature requirement
and the heat exchanger will not be harmed by low fl ow or zero fl ow
conditions. See Figure 3 for a sample piping layout.
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
The discharge from the safety relief
valve must be arranged to ensure
no danger of scalding personnel, or
equipment damage.
Provisions must be made to properly
pipe the safety relief discharge
away from the boiler to the point of
discharge.
No shutoff of any kind shall be placed
between the safety relief valve
and the boiler, or in the discharge
pipe between the valve and the
atmosphere. Doing so may cause an
explosion from overpressure.
The hydronic system should never be
fl ushed while the boiler is attached
to the system since the debris could
accumulate in the boiler and block
water from passing through the heat
exchanger.