Aux Pump/Output Options - Weil-McLain Evergreen 220 Advanced Manual

CONDENSING GAS BOILER
™

AUX PUMP/OUTPUT options

Figure 31 AUX PUMP/ OUTPUT operation (accessed in ASSIGN INPUTS menu – see page 50)
Option
Output is always energized whenever the control is powered.
ALWAYS ON
EXTERNAL
The output is energized on closure of an external switch wired to this
input and is de-energized when the external switch opens.
SWITCH
This output is energized only when outdoor temperature is below the
WWSD setting (see BOILER SETTINGS menu, Figure 23, page 41).
OUTDOOR
This setting is non-selectable if WWSD is set to OFF or ODT is not
BELOW WWSD
connected at initial boiler power. If Outdoor Below WWSD is already
chosen and WWSD is later set to OFF, Outdoor Below WWSD will
behave as Always On.
The assigned output is energized if there is an input closure on any of
the network boilers.
The assigned output will de-energize once there are; no input closures
on any of the network boilers, post-purge has finished, and post-pump
ANY TT I NPUT
time has expired.
If the closed input is configured for a heat demand, its output will de-
energize after post-purge and post-pump.
The assigned output is energized:
If there is an input closure on any of the network boilers.
AND . . .
ANY TT I NPUT
RUN AUX PUMP/OUTPUT is set to YES for the priority
BY ITS PRIORITY
assigned to the closed input.
SETTINGS
The assigned output will de-energize once there are; no input closures
on any of the network boilers, post-purge has finished, and post-pump
time has expired.
The assigned output is energized when any boiler on the network
receives a call for heat and starts to pre-purge.
ANY BURNER
DEMAND
The assigned output is de-energized once all burners are off and post-
purge is complete.
Figure 32
AUX PUMP/ OUTPUT operation — start, run and stop, based on boiler status
Option
ANY TT I NPUT
OR
ANY TT I NPUT BY ITS
PRIORITY SETTINGS
ANY BURNER DEMAND
Part number 550-100-160/0715
Activation conditions
TT Pre-
Standby Pre-Pump
Closed Purge
off ON
off off off
ON
— Advanced Manual
Hot loop for seasonal boilers that are manually
shut down at end of season and started up at
start of heating season.
Hot loop for boilers whose CH is manually
shut down at end of season and started up at
start of heating season, but remain available for
local calls (DHW, etc.).
Hot loop for boilers whose CH is automati-
cally shut down based on outdoor temperature
(inferred heat loss), but remain on for local
calls (DHW, etc.).
Energize a system pump relay if pump must
run during all heating calls.
Energize a system pump relay if pump must
run only on some heat calls (such as systems
with locally-connected DHW heating).
Use for interlocking with combustion air
damper, flow switch, etc.
Burner Post- Post-
Standby
Running Purge Pump
off
off off
Suggested uses
Comments
See Figure 31 for explanation of
differences between the ANY TT
INPUT options.
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