L8151A
TripleAquastat® Relay
The L8151A is a remote bulb controller for use with hydronic heating systems that include domestic hot water service.
■Provides high limit, low limit, and circulator control for maintaining boiler temperatures.
■Can provide multizone control by using a separate thermostat and R845 Relay for each zone.
■An internal transformer powers the thermostat circuit.
■Shielded capillary allows convenient mounting.
■Consists of a diaphragm powerhead and micro switch assembly that responds to temperature changes in the boiler water.
CONTENTS |
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Specifications ................................................. |
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Ordering Information ..................................... |
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Installation ..................................................... |
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Operation and Settings ................................... |
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Checkout ......................................................... |
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J. H. • Rev. 1-95 • ©Honeywell Inc. 1995 • Form Number60--2553—3
L8151A
SPECIFICATIONS • INSTALLATION • ORDERING INFORMATION
Specification
IMPORTANT: The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.
MODEL: L8151A Triple Aquastat® Relay for remote bulb control of hydronic heating systems that include domestic hot water.
ELECTRICAL RATINGS:
Power Supply: 120 Vac, 60 Hz; 220 Vac, 50 Hz and 240 Vac, 60 Hz operation.
Contact Ratings (A): See Table 1.
TABLE 1—CONTACT RATINGS.
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120 Vac |
240 Vac |
Full Load |
7.4 |
3.7 |
Locked Rotor |
44.4 |
22.2 |
MAXIMUM POWER CONSUMPTION: 8W at 120 Vac,
60 Hz.
MAXIMUM AMBIENT TEMPERATURE: 150°F (66°C) at case. 265°F (130°C) at sensing element.
PRESSURE RATING: 200 psi (1380 kPa) on outside of immersion well.
THERMOSTAT HEAT ANTICIPATOR SETTING: 0.2A. LOW LIMIT (Fig. 2):
Function: Maintains water temperature at setting during thermostat off periods.
Setting: 110°F to 220°F adjustable (43°C to 104°C). Differential: 10°F to 25°F adjustable (6°C to 14°C).
HIGH LIMIT (Fig. 2):
Function:Opensburnercircuitifwatertemperaturereaches high limit setting.
Setting: 130°F to 240°F adjustable (54°C to 116°C). Differential: 10°F fixed (6°C).
MOUNTING MEANS: Mounting lugs on back of case. DIMENSIONS: See Fig. 1.
SENSING ELEMENT: 3/8 x 2-7/8 in. (10 x 73 mm). CAPILLARY LENGTH: 36 in. (914 mm), armored
capillary.
UNDERWRITERS LABORATORIES INC. LISTED: File No. MP466, Guide No. MBPR2.
Installation
WHEN INSTALLING THIS PRODUCT...
1.Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
2.Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
3.Installer must be a trained, experienced service technician.
4.After installation is complete, check out product operation as provided in these instructions.
WARNING
CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY OR DEATH.
Product is for use only in a system with a pressure relief valve.
Ordering Information
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the Tradeline®
Catalog or price sheets for complete ordering number, or specify— |
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Order number. |
3. Order additional system components and system |
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Accessories, if desired. |
accessories separately. |
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:
1.Your local Home and Building Control Sales Office (please check the white pages of your phone directory).
2.Home and Building Control Customer Logistics Honeywell Inc., 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
60-2553—3 |
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