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® 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

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This manual is also suitable for:

Aquastat l8124cAquastat l8124aAquastat l8124gAquastat l8124eAquastat l8124lAquastat l8124m

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