Install Instructions

ManualsBrandsHydrolevel ManualsCooling & Air QualityModel 3150 HydroStat for Oil Boilers (Temperature Limit & LWCO)

83 Water Street • New Haven, CT 06511 • Phone (203) 776-0473 • FAX (203) 773-1019 • www.hydrolevel.com

MODEL 3150

Combination Low Water

Cut-Off & Universal

Temperature Limit Control

120 VAC Operating Voltage

PATENT PENDING

WARNING

Electrical shock hazard. To prevent electrical shock, death or

quipment 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.

CAUTION

To prevent serious

urns, boiler

should be thoroughly cooled before installing or

servicing control.

• Dual Function Design – HydroStat performs both high temperature limit and low

water cut-off functions when installed with a Hydrolevel Electro-Well™.

•

Replaces Common Aquastat

odels – Can be installed on existing immersion

wells to replace both cold-start and triple-action Aquastats

. Industry standard

wiring designations make change-outs quick and easy.

• Digital Display – Easy to read LED continually displays boiler temperature. Also

isplays temperature limit and differential settings during adjustment.

• Easy to Set – Dials for setting temperature limits and differentials eliminate

complicated programming.

•

Advanced Micro-Controller Design – Utilizes dual thermistor technology for

better accuracy, response and reliability.

•

*Aquastat is a registered trademark of Honeywell International, Inc.

HydroStat installed

with Electro-Well™

When installed with the Hydrolevel Electro-Well,

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 separately for field

installations. See Electro-Well models on page 8.

IMPORTANT When installed on a standard immersion well, HydroStat will not provide low water cut-off functionality.

HydroStat installed with

a standard immersion well

For field replacement of common Aquastat

models,

HydroStat can be installed with the immersion well

already on the boiler. In this configuration, HydroStat

will provide the temperature functionality of the control

being replaced, but will not provide low water cut-off

functionality. The “LWCO Active” LED will not illuminate.

Summary of content (8 pages)

PAGE 1
MODEL 3150 Combination Low Water Cut-Off & Universal Temperature Limit Control 120 VAC Operating Voltage PATENT PENDING • Dual Function Design – HydroStat performs both high temperature limit and low water cut-off functions when installed with a Hydrolevel Electro-Well™. • Replaces Common Aquastat* Models – Can be installed on existing immersion wells to replace both cold-start and triple-action Aquastats®. Industry standard wiring designations make change-outs quick and easy.
PAGE 2
MOUNTING THE CONTROL IMPORTANT Make sure that the immersion well or Electro-Well™ is installed on the boiler manufacturerʼs designated temperature limit control tapping. Note: If installing an Electro-Well, pipe sealing compound should be used. Teflon tape is not recommended. STEP 1 Two mounting positions are available on the back of the control (Fig. 1). Select which of the two positions (2 knockouts) is best for the location of the control. Remove the knockout. Place control on the well.
PAGE 3
WIRING shock hazard. To prevent electrical shock, death or equipment damage, disconnect power supply before WARNING Electrical installing or servicing this control. STEP 1 Connect 120 VAC Hot to terminal L1. Connect 120 VAC Neutral to terminal L2. Disconnect means and overload protection as required (provided by others). T and T. STEP 4 Connect the thermostat to STEP 2 Connect the circulator to C1 and C2. (C2 is neutral.
PAGE 4
SETTING THE CONTROL 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 Operates on call for heat only.
PAGE 5
LED LEGEND LWCO ACTIVE Indicates that the low water cut-off (LWCO) function of the HydroStat control is active. When the control is installed with a Hydrolevel Electro-Well, this LED will be on at all times when the control is powered. NOTE: If the control was installed with a well other than the Electro-Well, this LED will not illuminate. This indicates that the control is providing temperature function only.
PAGE 6
Troubleshooting Flow Chart 1 – Burner Will Not Fire Is the Green LED (TEMP ACTIVE) On? NO The Control is Not Powered. The Temp Active LED will be on at all times when the control is powered. Check for 120 VAC on terminals L1 and L2. YES CAUTION – ALWAYS ALLOW A BOILER TO COOL BEFORE ADDING WATER The burner will not fire until the low water condition is satisfied. Is the Red LED On? YES The Control is Sensing Low Water. Check that the sensor is inserted correctly into well.
PAGE 7
Troubleshooting Flow Chart 2 – Burner Will Not Shut Down Is the Red LED On? YES The Control is Sensing Low Water. WARNING! TURN OFF POWER TO BURNER IMMEDIATELY! NO Is the Yellow LED On? CAUTION – ALWAYS ALLOW A BOILER TO FULLY COOL BEFORE ADDING WATER. YES The Control is Sensing High Temperature. YES The Control is Operating Normally. Recheck wiring. Make sure that burner is wired to B1. Burner should never fire when red or yellow LED is lit.
PAGE 8
LOW WATER CUT-OFF TEST PROCEDURE HydroStatʼs low water cut-off function is active when the control is installed on a Hydrolevel Electro-Well. To test the low water cut-off function: Turn off power to the control. Set the thermostat to call for heat. Gently slide the sensor out of the well to simulate a low water condition. Re-energize power to the control. The red LOW WATER light should come on and the burner should not fire. Turn power off again and reinstall the sensor in the well.