Instructions / Assembly

ManualsBrandsRheem PROTECH ManualsPlumbingGas Thermostat and High Limit

PRODUCT DATA

® U.S. Registered Trademark

L8100A,B,C Aquastat

Controllers

GENERAL

L8100A,B, and C are immersion type controllers for

regulating and limiting the tank temperature in water heaters.

As the water temperature rises past the setpoint, the

controller switches off the gas valve.

FEATURES

• L8100A regulates tank temperature and provides

energy cutoff (ECO) action on a temperature rise past

the setpoint.

• L8100B regulates temperature and provides ECO

action on a temperature rise past the setpoint. This

model includes a second sensing element that senses

average water temperature to minimize stacking.

• L8100C includes a second sensing element that

senses average water temperature to minimize

stacking, but does not include ECO action.

• Fluid filled element operates single pole single throw

(spst) snap-acting Micro Switch™.

• Energy cutoff (ECO) switch enclosed in factory

installed well of L8100A,B interrupts the thermocouple

circuit or main valve before the tank reaches

maximum temperature of 210°F (99°C).

• Internal adjustment screw.

• Immersion well is factory installed to the controller.

• Special switch terminal provides three-wire hookup

from Aquastat® controller to gas valve.

• Four terminal models for manual reset with S86/

VR8204/VR8440.

Contents

General ............................................................................... 1

Features .............................................................................. 1

Specifications ...................................................................... 2

Ordering Information ........................................................... 2

Installation ........................................................................... 3

Operation and Checkout ..................................................... 8

60-2336-3

Summary of content (12 pages)

PAGE 1
L8100A,B,C Aquastat® Controllers PRODUCT DATA FEATURES • L8100A regulates tank temperature and provides energy cutoff (ECO) action on a temperature rise past the setpoint. • L8100B regulates temperature and provides ECO action on a temperature rise past the setpoint. This model includes a second sensing element that senses average water temperature to minimize stacking. • L8100C includes a second sensing element that senses average water temperature to minimize stacking, but does not include ECO action.
PAGE 2
L8100A,B,C Aquastat ® CONTROLLERS Capillary Length (for Remote Bulb): 24-5/8, 30, 39, 42, or 54 in. (625, 762, 991, 1067, or 1372 mm). SPECIFICATIONS IMPORTANT The specifications given in this publications do not include normal manufacturing tolerances. Therefore, an individual 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 when those conditions are changed.
PAGE 3
L8100A,B,C Aquastat ® CONTROLLERS Available Options: External adjustment screw and visible control point scale. Factory set stop at 140°F (60°C). INSTALLATION When Installing this Product... 쐃 Read instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 쐇 Check ratings and descriptions given in the specifications to make sure the product is suitable for your application. 쐋 Installer must be a trained, experienced service technician.
PAGE 4
L8100A,B,C Aquastat ® CONTROLLERS IMPORTANT The controller immersion well is factory-installed to the controller. Do not remove the immersion well, this could damage the ECO switch. JAWS 쐃 If system is filled, drain to a point below the tapping. 쐇 Remove plug from tapping. 쐋 If tapping is suitable, carefully screw immersion well into tapping. Do not tighten or apply force to the controller case. 쐏 Fill tank. Make sure that well is screwed in tightly enough to prevent leakage.
PAGE 5
L8100A,B,C Aquastat ® CONTROLLERS L8100A,B L8100A,B CONTROLLER CONTROLLER ECO SWITCH ECO SWITCH 3 2 PP TH POWERPILE® MILLIVOLT GENERATOR PP TH VS890 1 PP TH POWERPILE® MILLIVOLT GENERATOR PP TH VS820 GAS VALVE 2 1 VALVE OPERATOR COIL VALVE OPERATOR COIL PILOTSTAT® POWER UNIT COIL PILOTSTAT® POWER UNIT COIL 1 DOTTED LINE SHOWS INTERNAL WIRING. 2 SELECTED MODELS HAVE 3/16 AND 1/4 IN. TAB TERMINALS. 1 USE 4-TERMINAL VS820 GAS VALVE. 2 DOTTED LINE SHOWS INTERNAL WIRING.
PAGE 6
L8100A,B,C Aquastat ® CONTROLLERS L8100A,B L8100C 1 L1 (HOT) L2 CONTROLLER ECO SWITCH 3 2 PP TH V800 PP TH POWERPILE® MILLIVOLT GENERATOR PP TH VS890 1 PP TH VALVE OPERATOR COIL 2 VALVE OPERATOR COIL PILOTSTAT® POWER UNIT COIL 1 DOTTED LINE SHOWS INTERNAL WIRING. 2 INSTALL FIELD JUMPER BETWEEN TERMINALS TH AND PP. 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 DOTTED LINE SHOWS INTERNAL WIRING. 3 SELECTED MODELS HAVE 3/16 AND 1/4 IN.
PAGE 7
L8100A,B,C Aquastat ® CONTROLLERS L8100A,B CONTROLLER 3 S86E,F,G,H ECO SWITCH 1 L1 (HOT) 25V 25V TH-R TH-W L2 2 MV MV/PV PV GND TO GAS VALVE GND 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 S86E AND F MODELS ARE AVAILABLE WITH OR WITHOUT TH-R AND TH-W TERMINALS. 3 SELECTED MODELS HAVE 3/16 AND 1/4 IN. TAB TERMINALS. M4756 Fig. 14. Three-terminal L8100A,B hookup with S86E,F,G,H intermittent pilot system.
PAGE 8
L8100A,B,C Aquastat ® CONTROLLERS L8100A,B CONTROLLER S86H ECO SWITCH 3 1 L1 (HOT) 25V 25V TH-R TH-W MV MV/PV PV GND VR8440 VALVE TERMINALS L2 GND TH-TR 2 TH TR 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY-INSTALLED WIRES, DO NOT REMOVE. 3 SELECTED MODELS HAVE 3/16 AND 1/4 IN. TAB TERMINALS. M4757 Fig. 16. Four-terminal L8100B manual reset hookup with S86H and VR8440. The second element of the L8100B,C is located at the top of the tank.
PAGE 9
L8100A,B,C Aquastat ® CONTROLLERS Checkout Check to verify the Aquastat® controller was installed and adjusted properly. Put the system into operation and observe the action of the device through several cycles to make certain that it provides proper control of the system. Further adjustments can then be made to meet more exact comfort requirements.
PAGE 10
L8100A,B,C Aquastat ® CONTROLLERS 60-2336—3 10
PAGE 11
L8100A,B,C Aquastat ® CONTROLLERS 11 60-2336—3
PAGE 12
L8100A,B,C Aquastat ® CONTROLLERS Home and Building Control Honeywell Inc. 1985 Douglas Drive North Golden Valley, MN 55422 60-2336—3 G.R. Rev. 10-95 Home and Building Control Honeywell Limited-Honeywell Limitée 740 Ellesmere Road Scarborough, Ontario M1P 2V9 Printed in U.S.A. 12 Helping You Control Your World QUALITY IS KEY customer.honeywell.