Weil-McLain WM97+110, Руководство пользователя

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Part number 550-142-085/0712
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WM97+
gas
-
fired water boiler
— Boiler Manual
WM97+ control operation
Temperature settings
— You must ensure that the
WM97+ control is set for the proper water temperatures
for the system. Excessive water temperature can cause
significant property damage in some applications.
Multi-temperature systems
— If the heating system
includes circuits that require lower temperature water
(radiant slab circuits, for example) as well as higher
temperature circuits (DHW, finned tube baseboard, etc.),
it is recommended to protect low-temperature circuits
with limit controls that are wired to a WM97+ control
external limit circuit. Failure to provide regulation can
result in substantial property damage.
Figure 78
Control sequence of operation
Display
status
graphic
Control action
(also see Figure 79, page 70)
POWER
UP
• Check the boiler model listed on the power-up
screen. If it is not correct, turn off the boiler. See
page 73 to change setting.
• When power is turned on, the screen lists sen-
sors that are detected. If any sensor is not listed,
make sure it is connected correctly. Turn off
power and restart.
Standby
• Standby — no calls for heat
• Toggles through no dots, 1 dot, 2 dots, then
3 dots while in standby (wrench symbol will
show instead if maintenance is needed)
Blower on
• Call for heat detected
• Display on with BLUE light (space heating) or
PURPLE light (DHW)
• Start min/max on timers if more than one system
is calling — highest priority starts first
• Start circulators for this priority setup
• Calculate target temp — If sensor temp is below
target temp, begin firing sequence
• Blower to ignition speed for prepurge
Ignition on
• After prepurge times out, begin ignition cycle
• Activate gas valve and ignition spark
• Continue ignition spark for ignition period
• Turn off spark and use electrode to check for
flame signal
Space
heating
• Flame detected
• Release boiler to modulation
• NOTE: If flame is not detected, the gas valve
is turned off, blower turns on (postpurge), and
control starts cycle again. After 5 failures, the
control waits 60 minutes, then tries again.
• If priority timer times out, switch to next priority
and start priority timer
• If demand satisfied, go to postpurge
DHW
heating
or
CWH
• Flame detected
• Release boiler to modulation
• NOTE: If flame is not detected, the gas valve
is turned off, blower turns on (postpurge), and
control starts cycle again. After 5 failures, the
control waits 60 minutes, then tries again.
• If priority timer times out, switch to next priority
and start priority timer
• If demand satisfied, go to postpurge
Blower on
• Demand satisfied (temperature reaches target
temperature or limit setting)
• Gas valve off
• Blower to ignition speed for postpurge
• Return to standby after purge
Maintenance
• Display turns RED, toggling between graphic
screen and maintenance screen (occurs if main-
tenance schedule timer times out)
• Will show during standby only
• Boiler operates as normal
Error/fault
• Display turns RED due to error or limit event
• Flashing display means lockout condition —
display toggles between three screens as in
Figure 108, page 102.
WWSD
• Warm weather shutdown — the boiler will not
be allowed to fire on space heating if the outside
temperature is greater than the WWSD setting.
DHW operation is not affected by WWSD.
WM97+ control features
❏ ❏ Blower speed modulation to control the WM97+ boiler’s firing rate.
❏ ❏ Advanced PID response to anticipate system needs based on response
to heat input.
❏ ❏ Graphic and robust text display for ease of operation monitoring and
troubleshooting.
❏ ❏ Preset operating parameters for typical heating systems (finned tube
baseboard, radiant floor, DHW, and others), including target tempera-
tures, reset curves and circulator assignments.
❏ ❏ Control of up to three circulators or zone devices, assignable for each of
the three possible zone inputs. (Boiler circulator controlled internally.)
❏ ❏ Programmable priority assignment for DHW input.
❏ ❏ Integral outdoor reset option (see page 129), with reset curves matched
to the system type selected.
❏ ❏ Dual sensors for boiler outlet temperature and flue temperature, pro-
viding redundant protection.
❏ ❏ Integral low water cut-off.
❏ ❏ Boiler is shipped with an outdoor sensor, allowing outdoor reset opera-
tion for maximum boiler efficiency. See page 129.
Sequence of operation
1. Figure 78 is a summary of the operating sequence for the WM97+
control.
2. The symbols shown appear in the display as the WM97+ control cycles
the boiler.
3. The wrench symbol appears when a scheduled maintenance date ar-
rives. This informs the homeowner to call the contractor for service.
4. The exclamation mark symbol appears if a problem has been detected.
WM97+ control setup
BEFORE PROCEEDING, perform essential control
settings as instructed on page 71.
1. See page 72 for an overview of the WM97+ control menus. This page
also gives the location of instruction manual information for each of
the main menus.