FULTON Endura+ Series Installation And Operation Manual page 47

SECTION 2
EDRP-IOM-2019-0212
` OUTDOOR AIR TEMPERATURE SENSOR KIT
1. If outdoor air temperature reset capabilities are to
be utilized, an outdoor air temperature sensor kit is
required and field wired to a boiler.
2. An outdoor air temperature sensor kit is not required if
using fixed setpoint (no outdoor reset), or if the boiler
control is receiving an external hydronic setpoint signal
over a communication protocol or analog signal.
3. The sensor must be installed on an exterior wall, in a
location that will not be exposed to direct sunlight or
influenced by other mechanical equipment.
` DOMESTIC HOT WATER (DHW) TEMPERATURE SENSOR
1. This Endura+ boiler is capable of providing indirect
domestic hot water through a heat exchanger. A
domestic hot water temperature sensor is used for
this application. The Endura+ boiler is for closed loop
applications only; open loop must not be directly
heated by the boiler.
2. The sensor may be installed in the domestic hot water
constant recirculation supply piping, or the domestic
hot water storage tank.
` MOTORIZED ISOLATION VALVE CONTROL
1. A control relay is provided in the boiler control panel to
operate a two-position 120/1/60 motorized isolation
valve. The valve type may be either power-open /
power-close, power-open / spring-close, or spring-open
/ power-close.
2. A motorized isolation valve is used in variable primary
piping arrangements, in accordance with ASHRAE
90.1-2013, to prevent flow from traveling through idle
boilers.
3. The lead boiler motorized isolation valve will remain
open when all boilers are idle to provide a path of flow
in the hydronic system. See the Operation section for
programming motorized isolation valve control.
` VARIBLE SPEED SYSTEM PUMP CONTROL
1. The boiler controller provides start/stop and variable
speed control for two system (secondary) pumps, one
Questions? Please Contact Your Local Manufacturer's Representative
duty plus one backup, with automation rotation. The
pumps cannot be powered directly through the boiler
panel; a variable speed drive (not provided) is required.
2. Pump modulation is provided via a 0-10 VDC output
signal for each pump.
3. The pump start/stop contacts have a maximum rating
of 6 Amps at 120 VAC.
` DEDICATED BOILER PUMP CONTROL
1. Some installations may utilize primary-secondary
piping arrangements instead of variable primary piping
arrangements. In these instances, the boiler (primary)
loop is decoupled from the system (secondary) loop,
and a dedicated boiler pump will be required to provide
flow through the boiler.
2. The boiler controller provides a dedicated boiler pump
start/stop signal only; the pump cannot be powered
through the boiler panel. An external motor starter
or variable speed drive (not provided) is required to
control the circulator pump.
3. The pump contact has a maximum rating of 6 Amps at
120 VAC.
4. Can be modulated only if system pump feature is not
used. A 0-10 VDC output is provided.
` ALTERNATE COMMUNICATION PROTOCOL GATEWAY
Reference the Manual Supplement for Endura+ Gateways
for BACnet and other protocols.
` REMOTE BOILER ENABLE/DISABLE
1. A contact may be utilized to enable and disable each
boiler individually. Remove the jumper, and wire to a
remote control panel.
2. Closing the contact enables the individual boiler to
become available to start. When the contact is open,
the boiler will remain in a disabled state.
3. The remote boiler enable/disable contact provides a 24
VDC signal. Do not apply an external power source to
the remote boiler enable/disable contact; wire only
to dry contacts.
4. Modbus remote boiler enable/disable is also available.
INSTALLATION
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