Burnham K2WT Residential, Инструкция по установке, эксплуатации и обслуживанию

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A. Overview
1. Sage2.3 Controller
The Sage2.3 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 LCD Touch Screen Display.
In the event of a fault condition the user is guided
by “blinking” touch buttons to Help screens that
describe the problem. Operation evaluation
and problem-solving is enhanced by historical
capability including 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
XII. Operation
IMPORTANT
This boiler is equipped with a feature that saves energy by reducing the boiler water temperature as the heating
load decreases. This feature is equipped with an override which is provided primarily to permit the use of an
external energy management system that serves the same function. THIS OVERRIDE MUST NOT BE USED
UNLESS AT LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE:
• An external energy management system is installed that reduces the boiler water
temperature as the heating load decreases.
• This boiler is not used for any space heating.
• This boiler is part of a modular or multiple boiler system having a total input of
300,000 BTU/hr or greater.
• This boiler is equipped with a combi (space heating & instantaneous domestic hot
water).
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
Control 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. Additionally, as zones turn
“Off” maximum firing rate is immediately reduced
eliminating the need for supply water temperature
to first increase above setpoint. 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.