HydroStat 3150 - Control Settings Configuration; Cold Start Operation Setup; Warm Start Operation Setup; Boiler Operation Modes

4
SETTING THE CONTROL
To set COLD START operation
Operates on call for heat only.

Low Temperature Limit
Make sure Low Temperature Limit is turned fully
counter-clockwise (OFF position).

Low Temperature Differential
N
o change is required.

High Temperature Limit
(factory setting = 190°F)
Adjust setting until desired temperature is dis-
played.

High Temperature Differential
(factory setting = 10°F)
Using a small screwdriver, adjust setting until
desired differential is displayed.
To set WARM START operation
Maintains temperature for domestic hot water.

Low Temperature Limit
Adjust setting until desired temperature is dis-
played. Prior to adjusting, remove the jumper
located at the top right corner of the circuit board
(not equipped on all units).
IMPORTANT: If low limit temperature cannot
be set above 140°F, remove jumper.

Low Temperature Differential
Using a small screwdriver, adjust setting until
desired differential is displayed.

High Temperature Limit
(factory setting = 190°F)
Adjust setting until desired temperature is dis-
played.

High Temperature Differential
(factory setting = 10°F)
Using a small screwdriver, adjust setting until
desired differential is displayed.
OPERATION
Dynamic
Display
W
ater Temperature
a
nd Real Time
Verification of
Setting Adjustments.
Low Temperature
Limit Setting
(OFF or 110°-200°F)
Factory OFF
L
ow Temperature
Differential Setting
(10°-30°F)
Factory 10°F
H
igh Temperature
Limit Setting
(
100°-220°F)
Factory 190°F
Diagnostic LEDs
Test/Settings Button
High Temperature
Differential Setting
(10°-30°F)
Factory 10°F




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-condens-
ing) boilers, both HIGH and LOW LIMIT set points should be
150°F or above (Limit Setting - Differential Setting ≥ 150°F). Boiler
manufacturer’s temperature requirements supercede these rec-
ommendations.
Jumper