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resideo Aquastat L8148A Manual

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L8148A,E,J
Aquastat® Relays
Vertical
Mounting
APPLICATION
®
The L8148 Aquastat
Relays are immersion type hydronic
controllers that combine high limit protection with switching
relay control of burner and circulator motors.
Horizontal
Mounting
FEATURES
• All models are used with a 24 Vac thermostat.
• Models include special terminals for adding remote, low
limit temperature control.
• L8148E,J have terminals for adding zone valve system
wiring.
• L8148E models are available with plug for connecting
Aquastat Relay directly to D892/M892 Vent Dampers.
• All devices include transformer to provide power for the
low voltage control circuit. Different models provide
switching of line, low, or millivoltage burner circuit.
• Case available for horizontal or vertical mounting.
• Combinations of two insulation and two insertion well
lengths are available.
Application ..........................................................................
Features ..............................................................................
Specifications .....................................................................
Installation ..........................................................................
Setting and Adjustments ................................................... 11
Operation ............................................................................ 11
Checkout ............................................................................. 11
PRODUCT DATA
Contents
1
1
2
3
60-2278-10

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Summary of Contents for resideo Aquastat L8148A

  • Page 1 L8148A,E,J Aquastat® Relays PRODUCT DATA FEATURES • All models are used with a 24 Vac thermostat. • Models include special terminals for adding remote, low Horizontal limit temperature control. Mounting • L8148E,J have terminals for adding zone valve system wiring. •...

  • Page 2: Specifications

    Models available with plug for connecting L8148E directly to the D892/M892 Vent Dampers. Models available with plug (L8148E) and 50 VA transformer are for use with the Resideo SV9500/SV9600 SmartValve® System Control. No zone valves or relays can be powered from the L8148 when used with SV9500/SV9600 gas valves.

  • Page 3: Installation

    L8148A,E,J AQUASTAT® RELAYS TRANSFORMER 2-1/8 (54) (VERTICAL MOUNT) 3-1/8 3-3/8 (79) (86) 3-1/16 (78) (HORIZONTAL MOUNT) 6-1/8 (156) HIGH LIMIT DIAL 1-1/4 (32) 1/8 (3) (VERTICAL MOUNT) 1-1/4 (32) (HORIZONTAL MOUNTÑBOTTOM) KNOCKOUTS FOR SWITCHING 1/2 (13) CONDUIT RELAY 4-5/16 (110) M8925 Fig.
  • Page 4 L8148A,E,J AQUASTAT® RELAYS Mounting Wiring Boilers have tappings to allow immersion well (which must be IMPORTANT ordered separately) to be mounted horizontally so boiler water Terminals on the L8148 Aquastat Relay are approved of average temperature can circulate freely around the well. for use with only copper wire.
  • Page 5 L8148A,E,J AQUASTAT® RELAYS BACK OF IMMERSION CONTROLLER WELL CLAMP CONTROLLER CASE BOILER CASE IMMERSION WELL CLAMP IMMERSION ADAPTER WELL SPUD IMMERSION ADAPTER OLD IMMERSION WELL CLAMP SENSING WELL ASSEMBLY SCREW BULB HEAT-CONDUCTIVE COMPOUND BEND THE CAPILLARY TUBE TO HOLD THE SENSING BULB IN GOOD CAPILLARY THERMAL CONTACT WITH THE IMMERSION WELL AT POINTS (A) AND (B).
  • Page 6 L8148A,E,J AQUASTAT® RELAYS R845 RELAY (HOT) L8148A ORANGE WHITE C554 BLACK BURNER IGNITION R8184G POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. M2843A B1 IS 1/4 IN. TAB TERMINAL. Fig.
  • Page 7 L8148A,E,J AQUASTAT® RELAYS T87F T87F T87F THERMOSTAT ZONE 1 ZONE 2 ZONE 3 L8148E V8043F V8043F V8043F END SWITCH END SWITCH END SWITCH TH-TR TH-TR TH-TR HIGH LIMIT L6006 LOW LIMIT CONTROLLER L8148E CIRCULATOR (HOT) (HOT) THTR HIGH LIMIT LOW VOLTAGE GAS VALVE (eg, VR8300) C1 C2...
  • Page 8 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. M2298D B1 IS 1/4 IN. TAB TERMINAL. Fig. 11. Wiring L8148E with S8610A,F Intermittent Pilot Ignition Module with automatic vent damper plug and Resideo D892/M892 Vent Damper. 60-2278—10...
  • Page 9 L8148A,E,J AQUASTAT® RELAYS 24 VAC THERMOSTAT 197516A L8148E D892/M892 CABLE HIGH LIMIT CONTROLLER FUSE POLARIZED 4-PRONG 6-PRONG FEMALE MOLEX MALE MOLEX PLUG AND RECEPTACLE IN L8148E 4-PRONG FEMALE AND 5-PRONG MALE CIRCULATOR MATING PLUG ON CABLE MOLEX PLUG ON CABLE POWER SUPPLY.
  • Page 10 L8148A,E,J AQUASTAT® RELAYS T87F T87F T87F ZONE 1 ZONE 2 ZONE 3 R882C R882C R882C N.O. N.O. N.O. N.C. N.C. N.C. COM. COM. COM. N.O. N.O. N.O. N.C. N.C. N.C. COM. COM. COM. BURNER CIRCUIT (HOT) CIRCULATOR CIRCULATOR CIRCULATOR ZONE 1 ZONE 2 ZONE 3 L8148...

  • Page 11: Setting And Adjustments

    L8148A,E,J AQUASTAT® RELAYS SETTING AND ADJUSTMENTS OPERATION Setting WARNING Explosion Hazard. High Limit Switch Can cause severe injury, death or property damage. Heating systems differ and the correct temperature setting for This product is intended for use only in systems with a one system may not be the correct setting for another.
  • Page 12 Resideo Technologies, Inc. 1985 Douglas Drive North, Golden Valley, MN 55422 1-800-468-1502 60-2278—10 M.S. Rev. 05-21 | Printed in United States www.resideo.com © 2021 Resideo Technologies, Inc. All rights reserved. This product is manufactured by Resideo Technologies, Inc. and its affiliates.

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