Install Instructions
96 103448-08- 9/16
X. Operation
A. Overview
1. Sage2.2 Controller
The Sage2.2 Controller (Control) contains features and
capabilities which help improve heating system operation,
and efciency. By including unique capabilities, the Control
can do more, with less eld 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 ue 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
Sage2.2 Controller with the Zone Control detects active
(turned “on”) zones, totals btu/hrs expected and limits the
boiler ring rate to “match” actual home demand. Instead
of simply ring 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 efciency. 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
ring rate saves fuel dollars by increasing the amount of
ue 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 ame 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 eld 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 congured 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 eld 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 congured 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.