Hydrolevel 3250 - Manual (Page 7)

NOTE: Settings can be checked using the
TEST/SETTINGS Button. See page 8 for details.
Setting the High Limit
The high limit is factory set at 190°F. To adjust, turn the HI
TEMP Dial Ạ until the desired setting is displayed.
(Setting range: 100°-220°F)
Setting the Low Limit
The low limit is designed to maintain temperature in boil-
ers equipped with tankless coils used for domestic hot
water. The low limit is factory set to OFF. Prior to adjust-
ing, remove the jumper (not equipped on all units) ạ .
Then turn the LO TEMP Dial Ả clockwise until the
desired temperature is displayed. For proper operation,
the low temperature limit setting should be at least 10°
below the high limit setting. NOTE: For cold start opera-
tion, the low limit must be turned OFF. IMPORTANT: If low
limit temperature cannot be set above 140°F, remove
jumper ạ . (Setting range: OFF or 110°-200°F).
Setting the Economy Feature
The Economy Feature is factory set for a 1 zone heating sys-
tem. To adjust, turn the ECONOMY Dial ả until the number
displayed equals the number of heating zones. Do not
include indirect water heaters in the number of heating
zones. The Economy Feature conserves fuel by reducing
boiler temperature (see “How Thermal Targeting Works”
below). If the heating system is unable to supply needed heat
to the house, the ECONOMY Dial should be turned to a lower
setting (example: In a three zone house, turn the dial to 2 or
1). Conversely, if the boiler provides adequate heat, added
fuel savings can be achieved by selecting a higher setting
(example: 4 or 5). If the heating and indirect water heater
signals were not separated when wiring the control, the
Economy Feature should be turned OFF to ensure the boiler
supplies
adequate
tempera-
ture to
heat the
indirect
tank.
7
SETTING THE CONTROL
HOW THERMAL TARGETING WORKS
SYSTEM START-UP
Dynamic
Display
Water Temperature
and Real Time
Verification of
Setting Adjustments.
Low Temperature
Limit Setting
(OFF or 110°-200°F)
Factory OFF
High Temperature
Limit Setting
(100°-220°F)
Factory 190°F
Diagnostic LEDs
and Test Button
Jumper
Ả
ả
Ạ
Economy Dial
(OFF or LO, 1, 2, 3,
4, 5, HI)
Differentials
are automatic
and will vary
based on
control settings
and boiler tem-
perature.
Thermal Targeting technology analyzes thermostat activity and continually evaluate 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.
SETTING
Disables economy function. Will allow boiler to fire until
hi-limit temp is reached and re-fire with a 10° subtractive
differential.
Provides lowest level of fuel savings. Use this setting only
if the house does not stay warm at higher settings.
Recommended setting for single zone systems
Recommended setting for Two zone systems
Recommended setting for Three zone systems
Recommended setting for Four zone systems
Recommended setting for Five zone systems
Provides highest level of fuel savings
ạ
Zone/Indirect
Switch
Setting the Zone/Indirect Switch
See WIRING on page 4-6.
Activating Thermal Pre-Purge (optional)
NOTE: Activation of this feature is not
recommended for boilers with tankless coils.
Fuel Smart HydroStat has a Thermal Pre-Purge feature to
maximize efficiency. When activated, the control will purge
higher boiler temperatures down to 135° at the start of any
thermostat call and supply the latent energy in the boiler to the
heating zone that is calling. During the purge cycle, the dis-
play will indicate Pur. If the heat is not sufficient to satisfy the
thermostat, the control will energize the burner. This feature
works with single- and multi-zone heating systems utilizing cir-
culators or zone valves. No change in wiring is needed.
To Activate Thermal Pre-Purge
Push and hold the TEST/SETTINGS button for 20 seconds.
The display will read Pur On. To deactivate the feature, push
and hold the button a second time for
20 seconds. The display will read Pur OFF.
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: To reduce the potential for condensing, the control
will allow the boiler to heat to 120°F prior to energizing the circulator.
Indicator Light
(announces heat call)