Alpine Installation, Operating, and Service Instructions

96
103448-10- 6/18
X. Operation A. Overview
A. Overview
1. Sage2.X Controller
The Sage2.X Controller (Control) contains features
and capabilities which help improve heating system
operation, and efficiency. By including unique
capabilities, the Control can do more, with less field
wiring, and fewer aftermarket controls and components
– improving the operation of both new and replacement
boiler installations.
2. Advanced Touch Screen Display
Home Screen
Boiler status and setup selections are available from
an easy to use, dual color, LCD Touch Screen Display.
Over one hundred helpful information screens are
provided to explain status information and setup
functions. In the event of a fault condition the user is
guided by “blinking” touch buttons to Help screens
that explain the problem cause and corrective action.
Operation evaluation and problem-solving is enhanced
by historical capability including graphic trends, lockout
history records as well as boiler and circulator cycle
counts and run time hours.
3. Advanced Modulating Control
The Control modulates the boiler input by varying the fan
speed. As the fan speed increases, so does the amount
of fuel gas drawn into the blower. As a result, a fairly
constant air-fuel ratio is maintained across all inputs.
The Control determines the input needed by looking
at both current and recent differences between the
measured temperature and the setpoint temperature.
As the measured temperature approaches the setpoint
temperature, the fan will slow down and the input will
drop. The Control also utilizes boiler return water and
flue gas temperatures to adjust fan speed.
4. HeatMatch
TM
Software
When the boiler is installed with a Sage Zone Control
Panel (Zone Control) into a multiple zone home the
Control uses a patent pending HeatMatch Software to
improve home comfort, increase component life and
save energy. The Sage2.X Controller with the Zone
Control detects active (turned “on”) zones, totals btu/
hrs expected and limits the boiler firing rate to “match”
actual home demand. Instead of simply firing to 100%
in response to a cold supply water temperature the
Control combines heat matching with supply water
temperature control. The result is longer run times,
dramatic reduction in boiler excessive cycling and
higher operating efficiency. Avoiding extra cycling
saves customer fuel dollars (pre and post purge sends
heat up stack) and saves wear and tear on the boiler.
Lowering the boiler’s firing rate saves fuel dollars by
increasing the amount of flue gas condensation, always
the goal of condensing boiler installations.
5. Built-in Safety Control
The Control includes safety controls designed to ensure
safe and reliable operation. In addition to flame safety
controls the Control includes supply water temperature,
differential water temperature, and stack temperature
safety limits and stepped modulation responses.
Boiler modulation is adjusted when required to help
avoid loss of boiler operation due to exceeding limits.
Additionally, the Control accepts the field installation
of optional auxiliary safety limits.
6. Outdoor Air Reset
When selected the modulation rate setpoint is
automatically adjusted based on outside air
temperature, time of day and length of demand (boost)
settings. Outdoor air “reset” setpoint saves fuel by
adjusting the water temperature of a heating boiler
lower as the outside air temperature increases.
7. Warm Weather Shutdown (WWSD)
Some boilers are used primarily for heating buildings,
and the boilers can be automatically shutdown when
the outdoor air temperature is warm. When outside air
temperature is above the WWSD setpoint, this function
will shut down the boiler and system pump
.
8. Energy Management System (EMS) Interface
The control accepts a 4-20mAdc input from the EMS
system for either direct modulation rate or setpoint.
A factory configured RS485 Modbus interface is
available for Energy Management System (EMS)
monitoring when not used for Multiple Boiler Sequencer
Peer-To-Peer Network. Consult factory if this interface
must be used in addition to the boiler Peer-to-Peer
Network.
9. Circulator Control
The Control may be used to sequence the domestic
hot water, boiler and system circulators. Service rated
relay outputs are wired to a line voltage terminal block
for easy field connection. Simple parameter selections
allow all three pumps to respond properly to various
hydronic piping arrangements including either a boiler
or primary piped indirect water heater. Circulators
are automatically run for a 20 second exercise period
after not being used for longer than 7 days. Circulator
exercise helps prevent pump rotor seizing.
10. Multiple Boiler Sequencer Peer-To-Peer
Network
The Control includes state-of-the-art modulating
lead-lag sequencer for up to eight (8) boilers capable
of auto rotation, outdoor reset and peer-to-peer
communication. The peer-peer network is truly “plug
and play”. Communication is activated by simply
connecting a RJ45 ethernet cable between boilers.
The Control provides precise boiler coordination by
sequencing boilers based on both header water
temperature and boiler modulation rate. For example,
the lead boiler can be configured to start a lag boiler
after operating at 50% modulation rate for longer
than an adjustable time. The boilers are modulated in
“unison” (parallel) modulation rate to ensure even heat
distribution.