Weil-McLain WM97+100 Manual page 82

WM97+ Series 2
HEAT SETTINGS menus
4. Boost will continue until the setpoint (target temperature)
reaches the MAX SUPPLY setting.
5. The purpose of boost is to compensate for changes in demand
not addressed by the reset curve. Typically, set boost to 30
minutes. The factory default is "OFF" — that is, boost is not
enabled with default settings.
PRE PUMP TIME
1. The boiler circulator and zone circulators (if activated with
the WM97+ zone circulator outputs) will start this amount
of time before the burner is started.
POST P UMP TIME
1. The boiler circulator and zone circulators (if activated with
the WM97+ zone circulator outputs) will continue this
Figure 92 HEAT SETTINGS menus (see Figure 87, page 77 for access information)
Menu/Item Units
System Type Types
Boiler Circulator Spd Selection
Max Supply °F
Min Supply °F
Max Outdoor °F
Min Outdoor °F
Modulate On Diff °F
Modulate Off Diff °F
Min On Time minutes
Boost Interval minutes
Prepump Time: ### seconds
SEC
Postpump Time: ### seconds
SEC
Maximum Rate
WM97+70 RPM
WM97+110HW * RPM
WM97+110EBM RPM
WM97+155 RPM
Minimum Rate
WM97+70 RPM
WM97+110HW RPM
*
WM97+110EBM RPM
WM97+155 RPM
– 82 –
-
GAS FIRED WATER BOILER
Low High
Default
Value Value
Off Custom FTB
Off High Med
60 190 180
60 190 130
50 100 70
–20 50 0
2 10 5
2 10 5
off 240 30
off 240 off
0 240 20
off 240 30
1100 4300 4150
1400 5650 5450
1900 7850 7550
1300 5500 5300
1100 4300 1100
1400 5650 1400
1900 7850 1900
1300 5500 1300
— Boiler Manual
(continued)
amount of time after the burner is shut down when the call
for heat is satisfied.
MIN RATE / MAX RATE
1. Use to set minimum and maximum boiler inputs by setting
minimum and maximum blower RPM.
2. This adjustment can be used to match the maximum boiler
output the maximum heat load. This will reduce boiler cycling
and increase boiler/system efficiency.
During combustion testing
must be set to the Maximum Rate "High Value" listed
in Figure 92 to allow the boiler to be set to maximum
input during high-fire set-up and testing.
Select speed or select OFF to deactivate boiler during
space heating call.
Boiler enters manual reset lockout at 200°F.
N/A - DHW does not use reset.
N/A - DHW does not use reset.
N/A - DHW does not use reset.
Boiler turns on if temperature drops below target minus
differential on.
Boiler shuts down if modulates past target plus differential
off.
Shortest time boiler will satisfy space heating system
before switching to DHW.
When operating on ODR increases target 10°F when this
time expires until reaching MAX.
Additional time to run circulators longer than standard 10
second time.
Circulator run time after call for heat ends.
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(derated automatically if HIGH ALTITUDE is selected in
control setup).
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See Notice on page 79
*
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(derated automatically if HIGH ALTITUDE is selected in
control setup).
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See Notice on page 79
*
, the Maximum rate
Comment
Part number 550-142-204/0117