Advertisement
Quick Links
MODEL 3250- lus
Temp Limit / LWCO Control
with Thermal Targeting
for Water Boilers
120 VAC Operating Voltage
PATENT NO. 8,931,708; 8,844,834;
7,891,572; others pending
Three Function
Design
Temperature Limit Control
Designed for cold start and tankless
coil boilers.
Low Water Cut-Off
Provides protection against potentially
dangerous low water conditions
when installed with the Hydrolevel
Electro-Well™ (see page 2 for details).
Boiler Reset Control
•
Thermal Targeting – On-board micro-
processor adjusts boiler temperature
based on heating demand.
•
Outdoor Reset Ready – Compatible with
Hydrolevel OS-100 Outdoor Sensor Kit
(sold separately) for outdoor reset and
warm weather shut-down functionality
WARNING
Electrical shock hazard. To prevent electrical shock, death or
equipment damage, disconnect power supply before
installing or servicing control. Only qualified personnel may install or service this control in
accordance with local codes and ordinances. Read instructions completely before proceeding.
WARNING
Frozen pipes/water damage. Central heating systems are prone to shut down as a result of power or fuel outages,
safety related fault conditions or equipment failure. Installation of freeze protection monitoring or other precautions
is recommended for unattended dwellings in climates subject to sustain below-freezing temperatures.
126 Bailey Road, North Haven, CT 06473 • Phone (203) 776-0473 • FAX (203) 764-1711 •
INSTALLATION INSTRUCTIONS
and OPERATING MANUAL
• Saves Fuel – Features Thermal Targeting™ technology and
Thermal Pre-Purge capability
™
• Outdoor Reset Ready – Provides Outdoor Reset and Warm Weather
Shut-Down capability with the addition of Hydrolevel OS-100 Outdoor
Sensor Kit (sold separately)
• Universal Design – Replaces common cold-start and triple-action
Aquastats*
• Operating Indicators – LEDs, Dynamic Display and Test Button provide
continual and on-demand status checks
• Prioritizes Domestic Hot Water – Gives priority to low limit setting or to
calls from indirect water heater
• Reduces Condensation – Holds circulator off until boiler reaches 125°F
•
*Aquastat is a registered trademark of Honeywell International, Inc.
CAUTION
should be thoroughly cooled before installing or
servicing control.
1
To prevent serious
burns, boiler
www.hydrolevel.com
Advertisement
Summary of Contents for Hydrolevel Company 3250-plus
- Page 1 INSTALLATION INSTRUCTIONS and OPERATING MANUAL MODEL 3250- lus Temp Limit / LWCO Control • Saves Fuel – Features Thermal Targeting™ technology and Thermal Pre-Purge capability with Thermal Targeting ™ • Outdoor Reset Ready – Provides Outdoor Reset and Warm Weather for Water Boilers Shut-Down capability with the addition of Hydrolevel OS-100 Outdoor Sensor Kit (sold separately)
- Page 2 IMMERSION WELLS Fuel Smart HydroStat can be installed on an existing immersion well already in the boiler or on a Hydrolevel Electro-Well™ (sold separately). The low water cut-off function is automatically activated when installed on an Electro-Well™ . IMPORTANT: The control will not provide low water cut-off protection when installed on a standard immersion well. NOTE: Do not use heat-conducting grease.
- Page 3 WIRING WARNING Electrical shock hazard. To prevent electrical shock, death or equipment damage, disconnect power supply before installing or servicing this control. STEP 1 STEP 2 Connect 120 VAC Hot to terminal L1. Connect Connect the burner circuit to B1-B2. 120 VAC Neutral to terminal L2.
- Page 4 WIRING WARNING Electrical shock hazard. To prevent electrical shock, death or equipment damage, disconnect power supply before installing or servicing this control. NOTE: For proper operation of the boiler reset function, all heating thermostats must input to T-T or ZC-ZR terminals as indicated below. Jumping the T-T terminals and wiring the thermostat to the primary will override the economy feature.
- Page 5 WIRING WARNING Electrical shock hazard. To prevent electrical shock, death or equipment damage, disconnect power supply before installing or servicing this control. NOTE: For proper operation of the boiler reset function, all heating thermostats must input to T-T or ZC-ZR terminals as indicated below. Jumping the T-T terminals and wiring the thermostat to the primary will override the economy feature.
- Page 6 WIRING WARNING Electrical shock hazard. To prevent electrical shock, death or equipment damage, disconnect power supply before installing or servicing this control. NOTE: For proper operation of the boiler reset function, all heating thermostats must input to T-T or ZC-ZR terminals as indicated below. Jumping the T-T terminals and wiring the thermostat to the primary will override the economy feature.
-
Page 7: Setting The Control
SETTING THE CONTROL Diagnostic LEDs Test/Settings Button Jumper Dynamic Display Water Temperature and Real Time Zone/Indirect Switch Verification of Setting Adjustments. Indicator Light (announces heat call) Low Temperature Limit Setting High Temperature (OFF or 110°-200°F) Limit Setting Factory OFF (100°-220°F) Factory 190°F Economy Dial (OFF or LO, 1, 2, 3,... - Page 8 SYSTEM START-UP 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.
- Page 9 OPTIONAL FEATURES continued Manual Reset Low Water Cut-Off The low water cut-off operation on the HydroStat can be set to operate in automatic (default) or manual reset mode. When in manual reset mode, the control will shut-down the burner immediately when a low water condition is detected. If the low water condition is sustained for 30 seconds, the low water light will blink, indicating that the control has locked out the burner.
- Page 10 OPTIONAL FEATURES continued High Limit Differential When the Economy feature is on, the control’s Thermal Targeting feature actively sets varying differentials based on system conditions. This option allows for selecting a 10, 20 or 30 degree fixed differential when the Economy feature is turned OFF. These optional differential settings are subtractive from the HIGH LIMIT setting.
- Page 11 LED LEGEND and TEST/SETTINGS BUTTON temperatures below the high limit setting to maximize fuel TEMP ACTIVE Indicates that the Fuel Smart efficiency. When the boiler water reaches the target HydroStat control is powered and that the temperature temperature, the LED illuminates and the burner will shut function is active.
-
Page 12: Maintenance
MAINTENANCE Remove the Electro-Well™ from the heating system every five years and clean any scale or sediment deposits from all parts that are exposed to the boiler water. After cleaning, reinstall the well using pipe sealing compound. Teflon tape is not recommended. TROUBLESHOOTING Burner Will Not Fire See Flow Chart 1, page 13... - Page 13 Troubleshooting Flow Chart 1 – Burner Will Not Fire The Control is The Thermal Pre-Purge feature holds off the burner until the Does the Purging Latent control determines if the latent heat in the boiler can satisfy Display Read Heat from the the heat call.
- Page 14 Troubleshooting Flow Chart 2 – Burner Will Not Shut Down Is the The Control is Red LED Sensing (LOW WATER) Low Water. WARNING! TURN OFF POWER TO BURNER IMMEDIATELY! CAUTION – ALWAYS ALLOW A BOILER TO FULLY COOL BEFORE ADDING WATER. Recheck wiring.
- Page 15 ELECTRO-WELLS™ Fuel Smart HydroStat installed with Electro-Well™ When installed with the Hydrolevel Electro-Well™, Fuel Smart HydroStat will provide both temperature and low water cut-off functionality. If the control was supplied by the boiler manufacturer, it was installed with an Electro-Well™. The Electro-Well™ is available sepa- rately for field installations.
-
Page 16: Specifications
In no event shall Hydrolevel Company void and of no force or effect.
Need help?
Do you have a question about the 3250-plus and is the answer not in the manual?
Questions and answers