® U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved
L8124A,B,C,E,G,L,M
Aquastat® Relays
GENERAL
These immersion type controllers are for use with forced
hydronic heating systems that include domestic hot water
service.
FEATURES
• L8124 Aquastat® Relays provide high limit, low limit,
and circulator control for maintaining boiler
temperatures.
• L8124 Aquastat Relays can provide multizone control
by using a separate circulator and R845 Relay for
each zone.
• All L8124 Aquastat Relays mount directly on the boiler.
• L8124E,G and L have large transformers and extra
terminals for supplying power to low voltage zone
valves.
• L8124M is for use in a wood-coal/gas-oil multifuel
heating system. Circulator is independently controlled
by the thermostat.
General .............................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Wiring ...............................................................................
Operation .......................................................................... 10
Setting And Checkout ....................................................... 10
Checkout .......................................................................... 14
Material Safety Data Sheet (MSDS) ................................. 14
PRODUCT DATA
Contents
1
1
2
2
5
7
60-2061-10
Table of Contents
Related Manuals for Honeywell Aquastat L8124B
Summary of Contents for Honeywell Aquastat L8124B
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Page 1: Table Of Contents
Specifications ..............Ordering Information ............Installation ................ Wiring ................Operation ................10 Setting And Checkout ............10 Checkout ................14 Material Safety Data Sheet (MSDS) ......... 14 ® U.S. Registered Trademark Copyright © 2001 Honeywell • All Rights Reserved 60-2061-10... -
Page 2: Specifications
Honeywell, 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. - Page 3 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS Table 1. Aquastat Relay models. Electrical No. of V8043 Case Dimensions Ratings Can be Zone Valves Height Width Depth Used For Powered Multizone Burner Without Circulat With Model Control Additional Burner Mounting Number Circuit Circulators Transformer Circuit Circuit L8124A 120V 6-1/8...
- Page 4 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS 2-1/8 (54) (VERTICAL VOLTAGE MOUNT) BARRIER 3-1/8 3-3/8 (79) (86) 3-1/16 (78) TRANSFORMER (HORIZONTAL FOR THERMOSTAT MOUNT) CIRCUIT 6-1/8 DIFFERENTIAL (156) SETTING 1-1/4 (32) 1/8 (3) (VERTICAL CIRCULATOR MOUNT) RELAY 1-1/4 (32) (HORIZONTAL MOUNT—BOTTOM) LOW LIMIT KNOCKOUTS FOR SETTING 1/2 (13) CONDUIT M8961...
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Page 5: Installation
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS GROUND SCREW VOLTAGE BARRIER TRANSFORMER FOR THERMOSTAT CIRCUIT TRANSFORMER FOR THERMOSTAT CIRCUIT DIFFERENTIAL SETTING DIFFERENTIAL SETTING CIRCULATOR RELAY LOW LIMIT SETTING CIRCULATOR RELAY HIGH LIMIT SETTING GROUND SCREW LOW LIMIT SETTING M8962 M8963 Fig. 5. Internal view of L8124E. HIGH LIMIT SETTING Fig. - Page 6 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS IMPORTANT NOTE: Do not attempt to tighten the well using the case as a 1. Terminals on these Aquastat relays are approved handle. only for copper wire. 2. Immersion well must snugly fit sensing element and 3. Loosen, but do not remove, the immersion well clamp bulb must rest against bottom of well.
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Page 7: Wiring
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS BACK OF IMMERSION CONTROLLER WELL CLAMP CASE CONTROLLER BOILER CASE IMMERSION WELL CLAMP ADAPTER IMMERSION WELL SPUD IMMERSION WELL CLAMP OLD IMMERSION ADAPTER SCREW WELL ASSEMBLY SENSING BULB HEAT-CONDUCTIVE COMPOUND CAPILLARY TUBE SETSCREW SHORT TUBE FITS IN CENTRAL IMMERSION RECESS OF ADAPTER WELL CLAMP SCREW... - Page 8 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS T87F T87F T87F L8124A R845 RELAY R845 RELAY L1 C1 C2 B2 (HOT) PUMP PUMP PUMP R8184 C554 ORANGE BURNER BLACK IGNITION POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. M8822 B1 IS 1/4 IN.
- Page 9 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS T87F T87F T87F R845 RELAY R845 RELAY R845 RELAY (HOT) PUMP PUMP PUMP L8124E Q313A THPP PILOT C1 C2 GENERATOR MILLIVOLTAGE GAS VALVE (eg, VS820) POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. B1 IS 1/4 IN.
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Page 10: Operation
R-W make temperature will be the set point temperature plus the difference between the differential setting and 10°F (6°C). A setting stop (Honeywell part no. 126580, ordered separately) may be installed on the adjusting knob to prevent EXAMPLE:Set point of 140°F (60°C) differential set at 25°F turning the knob beyond a predetermined point. - Page 11 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS ZONE 1 ZONE 2 LOW VOLTAGE THERMOSTAT THERMOSTAT THERMOSTAT V8043F V8043F L8124M (HOT) L8124G,L LINE VOLTAGE CIRCULATOR LOW LIMIT (HOT) L2 1 LINE VOLTAGE OIL BURNER RELAY OR HIGH GAS VALVE LIMIT LOW LIMIT/ CIRCULATOR LINE VOLTAGE OIL BURNER RELAY OR HIGH...
- Page 12 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS TO ADDITIONAL R845A RELAYS LOW VOLTAGE (HOT) FOR OTHER ZONES THERMOSTAT L8124A,C R845A RELAY ZONE 2 ZONE 2 CIRCULATOR LOW LIMIT/ CIRCULATOR LINE VOLTAGE OIL BURNER RELAY OR HIGH GAS VALVE ZONE 2 LIMIT LOW VOLTAGE THERMOSTAT POWER SUPPLY.
- Page 13 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS LOW VOLTAGE THERMOSTAT ZONE 1 TO ADDITIONAL R845A RELAYS FOR OTHER ZONES (HOT) L8124L R845A RELAY ZONE 2 ZONE 2 CIRCULATOR LOW LIMIT/ CIRCULATOR HIGH LIMIT LINE VOLTAGE ZONE 2 OIL BURNER LOW VOLTAGE RELAY OR THERMOSTAT GAS VALVE POWER SUPPLY.
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Page 14: Checkout
Product Use: Heat conductive material used to enhance the high limit setting to 200°F (93°C). contact and heat transfer in temperature sensor applications. Manufacturer: Honeywell Inc., 1985 Douglas Drive North, Heat Anticipator Minneapolis, MN 55422. The thermostat heat anticipator should be set at 0.2A. - Page 15 L8124A,B,C,E,G,L,M AQUASTAT® RELAYS Section 2. Composition, Information on Ingredients (Table 3). Table 3. Ingredients of Heat Conductive Compound Ingredients CAS Number Percent No. 2 Lithium Complex Grease (70%): Mineral Oil 64742-65-0 35-50 5 mg/m 5 mg/m Mineral Oil 64742-62-7 20-25 5 mg/m 5 mg/m Lithium Hydrostearate/Sebacate Complex...
- Page 16 55108 (651-917-6100). Stable. Reactivity: Hazardous polymerization will not occur. Automation and Control Solutions Automation and Control Solutions Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 Printed in U.S.A. on recycled 60-2061—10 G.R.