Hydrolevel 3100 - Manual (Page 4)

4
SETTING THE CONTROL
To set COLD START operation
Operates on call for heat only.
ᕡ ᕡ Low Temperature Limit
Make sure Low Temperature Limit is turned fully counter-
clockwise (OFF position).
ᕢ ᕢ Low Temperature Differential
No change is required.
ᕣ ᕣ High Temperature Limit
(factory setting = 190°F)
Adjust setting until desired temperature is displayed.
ᕤ ᕤ High Temperature Differential
(factory setting = 10°F)
Using a small screwdriver, adjust setting until desired differ-
ential is displayed.
To set WARM START operation
Maintains temperature for domestic hot water.
ᕡ ᕡ Low Temperature Limit
Adjust setting until desired temperature is displayed.
ᕢ ᕢ Low Temperature Differential
Using a small screwdriver, adjust setting until desired differ-
ential is displayed.
ᕣ ᕣ High Temperature Limit
(factory setting = 190°F)
Adjust setting until desired temperature is displayed.
ᕤ ᕤ High Temperature Differential
(factory setting = 10°F)
Using a small screwdriver, adjust setting until desired differ-
ential is displayed.
WARM START
(maintains temperature for domestic hot water)
Low Limit Switch = ON
COLD START
Low Limit Switch = OFF
Example
High Limit = 180°
Differential = 10°
On a call for heat, the burner will
shut off at 180° and restart at
170° (180°-10°). The circulator
will run as long as there is a call
for heat.
High Temperature Limit
(Adjustable 100° to 220°F)
De-energizes burner at HIGH
LIMIT setting
High Temperature Limit
(Adjustable 100° to 220°F)
De-energizes burner at HIGH
LIMIT setting
High Temperature
Differential
(Adjustable 10° to 30°F)
Re-energizes burner when
temperature falls to the HIGH
LIMIT DIFFERENTIAL set point
High Temperature
Differential
(Adjustable 10° to 30°F)
Re-energizes burner when
temperature falls to the HIGH
LIMIT DIFFERENTIAL set point
Low Temperature Limit
(Adjustable 110° to 200°F)
De-energizes burner at LOW
LIMIT setting
Low Temperature
Differential
(Adjustable 10° to 30°F)
Re-energizes burner when
temperature falls to the LOW
LIMIT DIFFERENTIAL set point
Example
High Limit = 180°
Differential = 10°
On a call for heat, the burner will
shut off at 180° and restart at
170° (180°-10°). The circulator
will run as long as there is a call
for heat.
Example
Low Limit = 150°
Differential = 10°
When there is no call for heat,
the burner fires at
140°
(150°-10°) to maintain boiler
temperature. Burner shuts off
at 150°.
NOTE: To prioritize domestic hot
water the HydroStat control will
not allow the circulator to
operate at any time the
temperature is below the low
limit setting.
OPERATION
Dynamic
Display
Water Temperature
and Real Time
Verification of
Setting Adjustments.
All Settings are
Displayed Every
Time Control is
Powered Up
Low Temperature
Limit Setting
(OFF or 110°-200°F)
Factory OFF
Low Temperature
Differential Setting
(10°-30°F)
Factory 10°F
High Temperature
Limit Setting
(100°-220°F)
Factory 190°F
Diagnostic LEDs
High Temperature
Differential Setting
(10°-30°F)
Factory 10°F
ᕡ ᕡ
ᕢ ᕢ
ᕣ ᕣ
ᕤ ᕤ
NOTE: Be careful not to select overlapping temperature settings.
For example: If the HIGH TEMPERATURE LIMIT is set at
190°F with a HIGH TEMPERATURE DIFFERENTIAL set at 20°F,
then the LOW TEMPERATURE LIMIT needs to be set at 170°F
(190°F - 20°F = 170°F) or below.
IMPORTANT: To prevent flue gas condensation and reduce fatigue
caused by thermal cycling on conventional (non-condensing) boilers,
both HIGH and LOW LIMIT set points should be 150°F or above
(Limit Setting - Differential Setting ≥ 150°F). Boiler manufacturerʼs
temperature requirements supercede these recommendations.