Hydrolevel 3250-Plus - Manual (Page 8)

8
OPTIONAL FEATURES
HOW THERMAL TARGETING WORKS
SYSTEM START-UP
Thermal Targeting technology analyzes thermostat activity and continually evaluates how much heat the house requires. When it
is very cold outside, the heat demand is high and the Fuel Smart HydroStat will raise the boilerʼs Target temperature to provide
needed heat to the home. When the outside temperature is milder, the heat demand is lower. During these periods, the Fuel
Smart HydroStat will lower the boilerʼs Target temperature – saving fuel – while continuing to provide comfort to the house.
At initial start up, with the Economy Feature active, the control establishes a 145°F target temperature. To test the high limit
shut-off function, the Economy Dial must be turned to OFF. Once tested, restore the Economy setting. If the heating demand is
high, the target will increase over time to satisfy the heat load.
NOTE:
• Smart DHW Priority: During a call from an indirect water heater, the control will de-energize the circulator contacts (C1/C2) to
heat only the indirect tank ensuring an adequate supply of domestic hot water. The control will re-energize the circulator when
the indirect tank is satisfied or if the boiler temperature reaches 170°F. If the indirect call continues for 45 minutes, the control
will override the priority function energizing the circulator to provide space heating.
NOTE: The Program Mode – – is accessed by turning the
LO TEMP dial to a position just above OFF.
Thermal Pre-Purge
Thermal Pre-Purge is designed to maximize boiler efficiency. When activated, the control will supply latent heat that may
remain in the boiler from a previous run cycle to the heating zone that is now calling. The control monitors how quickly the boil-
er temperature is declining and activates the burner only when it determines that the latent heat is insufficient to satisfy the call.
During the purge cycle, the display will indicate . This feature works with single-zone and multi-zone heating systems uti-
lizing circulators or zone valves. No change in wiring is needed.
To activate Thermal Pre-Purge
1. Turn the LO TEMP dial to access the Program Mode – indicated in the display as
2. Turn the HI TEMP dial to select feature
3. Push the Test/Settings Button to turn Thermal Pre-Purge
or
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 7)
Degrees Fahrenheit or Celsius
The control has the ability to operate in degrees Fahrenheit or Celsius. When operating in Celsius, a will appear in the dis-
play next to the temperature whenever the temperature is below 100 degrees.
To change between degrees Fahrenheit and degrees Celsius
1. Turn the LO TEMP dial to access the Program Mode – indicated in the display as
2. Turn the HI TEMP dial to select feature
3. Push the Test/Settings Button to for Celsius or for Fahrenheit
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 7)
MORE OPTIONAL FEATURES ON NEXT PAGE
HydroStat 3250-Plus Instructions: HydroStat Instructions.8pg 11/14/13 3:43 PM Page 8