Specifications

Part number 550-142-120/0113
WM97+ gas-fired water boiler — Boiler Manual
– 80 –
DHW SETTINGS menus
Figure 90 DHW SETTINGS menus (see Figure 91, page 81 for
setting values and descriptions)
DHW SETTINGS
1. The DHW SETTINGS menus are for setting control
operation during DHW operation. The settings
apply ONLY to Zone 1. (see Figure 90)
2. If DHW is used, the settings for control operation
during DHW calls for heat are set under the DHW
SETTINGS menus (see Figure 90, page 80).
DHW
1. Use this setting to enable or disable DHW operation
of the WM97+ control.
2. The temperature presets are chosen based on
normal best setting for DHW systems. The tem-
perature values can be changed, if desired, under
“TEMPERATURES.”
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BOILER CIRCULATOR SPEED
Direct-connected DHW (bottom connections)
1. The boiler circulator speed must be set to OFF for directly-connected
DHW applications.
2. A separate DHW circulator must be supplied and wired to Circula-
tor 1 output.
DHW as a zone in the system
1. Boiler circulator as system circulator — The boiler circulator should
be set to HIGH for most applications on which the boiler circulators
provides system flow.
2. Primary/secondary piping, zone valve-zoned or circulator zoned — Set
the boiler circulator speed to LOW. Increase speed if needed.
CWH Installations — See Companion Water Heater man-
ual for screen information. When the WM97+ control detects
the combi temperature sensors, it automatically enables the
CWH screens and CWH control operation.