Honeywell L4103 Installation Manual

L4103A,B,C COMBINATION Aquastat ® AND HIGH LIMIT CONTROLLER

M6805

BURNER MOTOR

OIL PRIMARY CONTROL

L4103

FLUE

LOW WATER CUTOFF

GAS VALVE

LIMIT

AQUASTAT®

PRESSURE CONTROL

PILOTSTAT® CONTROL

M13139

L4103C

L1 (HOT) L2

1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

L1 (HOT)

IGNITION

BURNER MOTOR

OIL VALVE

LIMIT

AQUASTAT®

BLACK

ORANGE

WHITE

M6804

R4184 OIL PRIMARY CONTROL

12PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION

AS REQUIRED.

R8184G MAY BE USED IF T-T TERMINALS ARE JUMPERED.

L4103

INSTALLATION

When Installing this Product…

1. Read these instructions carefully. Failure to follow instructions can damage the product or cause a hazardous condition.

2. Check ratings given in the instructions and on the product to make sure the product is suitable for your application.

3. Make sure the installer is a trained, experienced service technician.

4. After completing the installation, use these instructions to check out the product operation.

CAUTION

Hazardous Voltage. Can cause electrical shock or equipment damage.

Disconnect power supply before beginning installation. Do not exceed ratings in the Specifications.

Mounting

The manufacturer provides a tapping for insertion of the controller sensing element. This tapping is located at a point where typical water temperature can be measured. Follow the instructions furnished by the system manufacturer, if available, or use this procedure:

1. Make sure the burner is turned off.

2. If the system is filled, drain to a point below the tapping.

3. Remove the plug from the tapping. (If no tapping is

provided, prepare one properly sized and threaded at the selected location.)

4. Install the immersion well in the heater tapping, using a wrench on the well hex.

5. Mount the L4103 by carefully inserting the sensing element into the well. See Fig. 2.

6. Fit the case over the outer ridge on the neck of the well and secure it in place by tightening the clamp screw on the top of the case.

Fig. 2. Location of L4103A,B in oil-fired water heater.

IMPORTANT

The immersion well must fit the sensing bulb snugly and the bulb must rest against the bottom of the well. Bend the tubing, if necessary, to hold the bulb against the bottom of the well, but do not make a sharp bend in the tubing. Some models have an adjustable tubing length that can be pulled out to 3 in. (76 mm), if necessary.

Wiring

CAUTION

Hazardous Voltage. Can cause electrical shock or equipment damage.

Disconnect power supply before making wiring connections.

All wiring must comply with applicable codes and ordinances. Refer to burner manufacturer wiring information, if available. Fig. 3 shows a typical hookup of the L4103A,B oil-fired application. Fig. 4 and 5 show L4103C gas-fired applications.

Fig. 3. Typical hookup for L4103A,B

Combination Aquastat® and Limit Controller.

Fig. 4. L4103C Combination Aquastat® and Limit

Controller in low voltage gas applications.

60-2344—7

L4103A,B,C COMBINATION Aquastat ® AND HIGH LIMIT CONTROLLER

LOW WATER CUTOFF

GAS VALVE

1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

PRESSURE CONTROL

PILOTSTAT® CONTROL

AQUASTAT®

LIMIT

L4103C

L1 (HOT) L2

M13140

Fig. 5. L4103C Combination Aquastat® and Limit

Controller in line voltage gas applications.

OPERATION

When the water temperature in the water heater drops, the Aquastat® Temperature Controller switch makes to energize the control. The burner operates until the water temperature rises to the setpoint and the temperature controller breaks the circuit to the oil primary control.

The internal high-limit controller breaks the circuit to the burner if an overheating condition occurs and the safety switch locks out.

When the limit breaks on the L4103A,B,C, the oil primary control must be reset before burner operation can resume.

SETPOINT SCALE

HIGH LIMIT SWITCH WITH LEADWIRES

AQUASTAT

SWITCH

Fig. 6. Internal view of L4103A,B,C

with leadwires on high limit.

SETPOINT SCALE

M6807

Adjusting

Adjust the control point to agree with the manufacturer recommendations. To adjust, remove the cover and set the scale to the desired control point. See Fig. 6 and 7. Limit setpoint is nonadjustable.

CHECKOUT

Check to make certain that 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.

Home and Building Control

Honeywell Inc. Honeywell Plaza P.O. Box 524 Minneapolis MN 55408-0524

Honeywell Latin American Region

480 Sawgrass Corporate Parkway Suite 200 Sunrise FL 33325

Home and Building Control

Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 3N7

Honeywell Europe S.A.

3 Avenue du Bourget 1140 Brussels Belgium

HIGH LIMIT SWITCH WITH QUICK CONNECT

AQUASTAT

SWITCH

Fig. 7. Internal view of L4103A,B,C with

quick connects on high limit.

Honeywell Asia Pacific Inc.

Room 3213-3225 Sun Hung Kai Centre No. 30 Harbour Road Wanchai Hong Kong

M6808

Printed in U.S.A. on recycled

60-2344—7 G.H. Rev. 5-98

60-2344—7 4

paper containing at least 10% post-consumer paper fibers.

customer.honeywell.com