Heating Settings Menu - Weil-McLain Series 2 Manual

® S
ERIES

HEATING SETTINGS menu

Figure 81 HEATING SETTINGS
Figure 84, page 74 for setting values and
descriptions)
HEATING SETTINGS
1. The heating settings menu is for setting control operation
during space heating. The settings apply to zones controlled
by the HEAT Input/output. See Figure 84, page 74 for a listing
of menu parameters.
2. If DHW is used, the settings for control operation during
DHW calls are set under the DHW SETTINGS menus (see
Figure 86, page 75).
HEATING DESIGN TEMPERATURES
1. Set desired temperatures for space heating zones. Refer to
Figure 83, page 73, for recommended settings based on
system type.
2. For an explanation of the target temperatures and associated
outdoor temperatures, see Figure 82.
SUPPLY MAX
1. Set SUPPLY MAX to the required supply water temperature
for the system at design maximum heat loss (typically 180°F
for finned tube baseboard on new installations).
SUPPLY MIN
1. SUPPLY MIN should equal the desired minimum supply
water temperature for the system.
2. The factory default is 130°F. This could be set as low as 60°F,
which would supply "zero heat" when outdoor temperature
is 60°F, because supply water temp would equal room temp.
3. See examples in Figure 82.
72
2
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G
AS FIRED WATER BOILER
menu (see
— Boiler Manual
Figure 82 Typical outdoor reset curves
OD RESET MAX
1. OD RESET MAX means the outdoor temperature at which
the target temperature reaches its minimum (SUPPLY MIN).
2. In the example of Figure 82, this occurs at 70°F (the factory
default).
OD RESET MIN
1. OD RESET MIN means the outdoor temperature at
which the target temperature reaches its maximum value
(SUPPLY MAX).
2. In the example of Figure 82, this occurs at 0°F outside
(the factory default setting).
3. OD RESET MIN should equal the ODT (outdoor design
temperature) for the installation's location.
MODULATE ON DIFF
1. The temperature must drop this many degrees below target
temperature for the boiler to come on when a call for heat
is present on HEAT Input.
MODULATE OFF DIFF
1. While the boiler is firing, as the temperature increases above
the target temperature, the boiler firing rate is reduced.
2. At this many degrees above the target temperature, the
control will temporarily turn off burner. The burner will
be restored when temperature drops below TARGET
TEMPERATURE minus MOD ON DIFF.
Part number 550-142-190/1218