© Fulton Group N.A., Inc. 2022
INSTALLATION EDR-SOLA-IOM-2022-0216 SECTION 2
2-42
5. It is eld installed downstream of the boilers in the
common supply water header. The well must be directly
in the path of ow and not isolated with a valve to
provide an accurate temperature reading. Do not install
the supply header temperature sensor in the return
water header.
6. See Figures 4 7 for the proper installation location in
hydronic piping.
` OUTDOOR AIR TEMPERATURE SENSOR KIT
1. If outdoor air temperature reset capabilities are to
becontrolled by the Fulton SOLA, an outdoor air
temperature sensor kit (P/N 4-30-000400) is required
and eld wired to the MASTER boiler.
2. An outdoor air temperature sensor kit is not required if
using xed water temperature operation, 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
inuenced by other mechanical equipment.
4. A relay is provided loose with the sensor, to be wired in
the eld by others.
` DOMESTIC HOT WATER DHW TEMPERATURE SENSOR
1. This boiler is capable of providing indirect domestic hot
water through a heat exchanger. A domestic hot water
temperature sensor (P/N 4-30-000332) is used for this
application. This 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.
3. See the Operation section for programming DHW
priority.
` MOTORIZED ISOLATION VALVE CONTROL
1. A control relay is provided as standard 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. Select a valve actuator with a cycle time from close
to open, and open to close, of 45 seconds or less. Do
not use slower valve actuators as they may result in
system issues such as manual reset lockouts or poor
temperature control response.
3. A motorized isolation valve is used in variable primary
piping arrangements, in accordance with ASHRAE
90.1-2013, to prevent ow from traveling through idle
boilers.
4. The lead boiler motorized isolation valve must be eld
programmed to remain open when all boilers are idle
to provide a path of ow in the hydronic system. See
the Operation section for programming motorized
isolation valve control.
` AUXILIARY SAFETY INTERLOCK FOR EXTERNAL DEVICE
1. When the Endura boiler receives a call for heat, the
startup sequence rst checks for a completed LCI circuit.
If the LCI circuit is open, the boiler control will remain
in a standby state until it is closed. No alarms will be
annunciated while the LCI is in a standby state.
2. A jumper is factory installed in the LCI circuit. For
applications requiring a safety interlock, this jumper
may be removed with terminals wired into the dry
contacts of an external device.
3. Typical uses for the safety interlock include but are not
limited to: motorized isolation valve end switches, proof
of exhaust draft assist fan operation, motorized air
intake louvers.
4. Multiple safety interlocks may be used, wired in series.
` 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
ow through the boiler.
2. The boiler controller has outputs that may be used for
dedicated boiler pump or domestic hot water pump
control. These are intended for use as a pump start/stop
signal only; the pump should not be powered through
the boiler panel. An external motor starter or variable
speed drive, by others, is used to control the circulator
pump.
3. The device contacts (A, B, C) have a maximum rating of
7.4 Amps at 120 VAC.
To Next Page
Loading...
