Honeywell L8104D - Manual
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Table of Contents:
- Page 2 – Specifications; Ordering Information
- Page 5 – Installation; WARNING
- Page 10 – Setting and Checkout
- Page 11 – Operation
- Page 12 – Troubleshooting
1
68-0063—3
J. H. • Rev. 6-95 • ©Honeywell Inc. 1995
L8104A,B,C,D
Electronic Water
Heater Controllers
The L8104A,B,C,D Electronic Controllers pro-
vide temperature control and ECO limit action for
gas water heaters.
L8104B with
Potentiometer
Remote
Potentiometer
Sensing
Bulb
■
L8104A,B are used in standing pilot and electronic
ignition systems.
■
L8104C,D are used only in electronic ignition sys-
tems.
■
Includes electronic module, one or two sensing bulbs,
and setpoint potentiometer (remote- or board-
mounted).
■
Sensing bulb contains thermistor sensor and ECO
switch. Second bulb in L8104B,C contains ther-
mistor only.
■
L8104A has single sensing bulb.
■
L8104B has two sensing bulbs available with upper
and lower bulb sensing authority allocated in ratios
of 1:1, 2:1, 3:1, and 4:1. Two sensing bulbs provide
temperature averaging.
■
L8104C has two sensing bulbs and manual reset
pushbutton.
■
L8104D has one sensing bulb and manual reset
pushbutton.
68-0063-3
■
Temperature range is factory-set to meet application
requirements. Maximum setting temperature is 200
°
F
(93
°
C).
■
ECO limit setting is factory-set to meet application
requirements.
■
For L8104A,B, standing pilot must be manually re-
lit or ignition module must be reset when ECO shuts
off gas control.
■
For L8104C,D, ignition module must be reset using
pushbutton switch mounted on electronic control
module when ECO shuts off gas control.
■
Control circuit is accurate within
±
3.5
°
F (1.9
°
C) at
maximum setpoint (200
°
F [93
°
C]; setpoint controls
are accurate within +7
°
F [+3.8
°
C], -0
°
F [-0
°
C]).
CONTENTS
Specifications ................................................. 2
Ordering Information ..................................... 2
Installation ..................................................... 5
Setting and Checkout .................................... 10
Operation ..................................................... 11
Troubleshooting ........................................... 12
Material Safety Data Sheets ......................... 15
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Summary
68-0063—3 2 L8104A,B,C,D SPECIFICATIONS • ORDERING INFORMATION Specifications IMPORTANT: The specifications given in this publication do not include normal manufacturing tolerances.Therefore, this unit may not exactly match the listedspecifications. Also, this product is tested and cali-brated under...
5 68-0063—3 L8104A,B,C,D INSTALLATION Installation WHEN INSTALLING THIS PRODUCT… 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardouscondition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable...
68-0063—3 10 L8104A,B,C,D SETTING AND CHECKOUT Setting and Checkout SET CONTROL TEMPERATURE If the potentiometer is mounted on the control module, turn the selector knob to the desired temperature. If the potentiometer is remotely mounted, the position of the flat part of the shaft determines the ap...
