Mode 3 And 4 Outdoor Reset & Dhw Operation; Applications - Slant/Fin SF-10 Operation And Instruction Manual

MODE 3 and 4 – Outdoor Reset & DHW Operation

Applications

MODE 3 – OUTDOOR RESET AND DHW OPERATION WITH PARALLEL PIPING
The control receives a heat demand provided from zone valve end switches or a switching relay end switch. The control
turns on the boiler pump and operates the boiler to maintain the outdoor reset boiler target temperature at the boiler out-
let sensor. The control receives a DHW Demand from a DHW aquastat. The control turns on the DHW pump and operates
the boiler to maintain the DHW boiler target temperature at the boiler outlet sensor whenever a DHW demand is present.
MODE 4 – OUTDOOR RESET AND DHW OPERATION WITH PRIMARY / SECONDARY PIPING
The control receives a heat demand provided from zone valve end switches or a switching relay end switch. The control
operates the boiler to maintain the outdoor reset boiler target temperature at the boiler supply sensor. The control receives
a DHW Demand from a DHW aquastat. The control turns on the DHW pump, boiler pump, and operates the boiler to main-
tain the DHW boiler target temperature at the boiler supply sensor whenever a DHW demand is present.
20 Model SF-10 Control Instructions Manual
BTC
DHW
Tank
Boiler
Outlet
Sensor
Boiler
Inlet
Sensor
BTC
Boiler
Outlet
Sensor
DHW
Tank
Boiler
Supply
Sensor
Boiler
Inlet
Sensor
Outdoor
Sensor
Outdoor
Sensor