Bradford-White Corp BWCH Manual De Usuario

Page 45

the typical coldest temperature of the year where the 

building is located. This temperature is used when 

doing heat loss calculations for the building.

BOIL DSGN) – The BOIL 

DSGN temperature is the water temperature required 
to heat the boiler zones when the outdoor air is as cold 

as the OUTDR DSGN temperature.

Warm Weather Shut Down (WWSD) 

– When 

the outdoor air temperature rises above the WWSD 

setting, the control turns on the WWSD segment 

in the display. When the control is in WWSD, 

the Dem segment is displayed if there is a heat 

demand. However, the control does not operate the 

heating system to satisfy this demand. The control 
does respond to a setpoint demand and operates as 

described in the Reset Override section (next).

SETPOINT DEMAND) – This 

is used when override of the outdoor reset curve is 
needed, such as when an indirect water heater is served 

by the heating system. A setpoint demand is required 

whenever heat is required for the setpoint load. The 

setpoint demand overrides the reset water temperature. 

The control turns on the Setp Dem pointer in the 

display. The control energizes the pump (on pump-

mounted boilers), energizes the Pmp-Pmp terminals, 

and turns on the boiler pump segment in the display.