Honeywell L4064B Installation Manual

SUPER TRADELINE L4064B

ADD HEAT INSULATING MATERIAL IF

NEEDED

FURNACE

PLENUM

11,219

Universal Combination Fan and Limit Controllers

APPLICATION

The L4064B controls the on and off operation of the heating unit’s fan motor and provides high limit control of the main burner. It is suitable for all types of forced air heating systems. The L4064B’s bimetal sensing element turns fan on and off according to plenum temperature. The L4064B has a manual switch to provide continuous fan operation, mounting adapters for replacing competitive devices, adapters for wiring convenience, and a strain relief bushing for protecting the wiring from damage due to field abuse. Limit contacts are suitable for line voltage, low voltage or millivoltage circuits. The fan-on timing can vary depending on applied voltage and switch ambient.

INSTALLATION When installing this product...

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

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

3. Installer must be a trained, experienced service technician.

4. After installation is complete, check out product operation as provided in these instructions.

WARNING

Failure to remove brass jumper, if limit switch is in low voltage circuit, can cause electrical shock hazard or damage low voltage controls.

CAUTION

1. Disconnect power supply before connecting wiring to prevent electrical shock or equipment damage.

2. When connecting cable or conduit to control, avoid straining the control case.

Follow furnace or burner manufacturer’s instructions, if available. The L4064B has a maximum switch temperature of 190

F (88OC), maximum element temperature of 350OF (177OC). Do not exceed these temperatures or the following electrical ratings (amperes):

240 Vac

FAN

7 4

Full Load

Locked Rotor

120 Vac

FAN LIMIT

LIMIT

Pilot Duty: 2 A at 24 Vac; 0.25 A at 0.25 to 12 Vdc. Maximum Combined Connected Load: 2000 VA.

C (167OF) (min.) field wiring required. Wiring must

75 conform to NEC Class 1 requirements.

LOCATION

If this is a replacement installation, locate the L4064 in the same location as the control being replaced. Sensing tube length should be same as old control. If this is a new installation, the element should be installed only by a trained, experienced service technician according to the furnace manufacturer’s instructions. The element must not touch any internal part of the furnace.

NOTE:

The electrical rating is at maximum switch temperature of 190 temperature exceeds 190 insulating material or a mounting bracket must be used.

MOUNTING

The device may be mounted either on the plenum surface or with a bracket (rigid or swivel).

SURFACE MOUNTING

Hole in plenum should be just large enough to accommodate the 3/4 in. (19.1 mm) diameter element tube, Fig. 1. For adequate clearance, a 13/16 in. (20.6 mm) diameter hole is reccomended.

1. Remove cover by squeezing sides and pulling off. Insert element in plenum and mark location of mounting holes. Make sure the case is snug against the plenum before marking the mounting screws.

2. Punch or drill holes for mounting screws.

3. Place insulation between plenum and case if necessary.

4. Fasten controller securely with mounting screws.

Fig. 1 - Surface mounting requires a hole 13/16 in. (20.6 mm) diameter for element insertion.

PRODUCT DATA

F (88OC). If plenum surface

F (88OC), heat

SWIVEL MOUNTING

100

150

200

250

ON/OFF

FAN LIMIT

DO NOT ROTATE HOLD

DIAL WHEN SETTING

CAUTION

FAN

LIMIT

PUSH MAN PULL AUTO

REMOVABLE

BRASS

JUMPER

STANDARD WIRE PUSH IN CONNECTORS

(4)

FEMALE

RECEPTACLE FOR

CONNECTION OF

1/4 IN. (6.4 MM)

MALE SPADE

TERMINAL (4)

WIRING GUARD

TO RELEASE

STANDARD WIRE -

PUSH SCREW DRIVER IN AND PULL WIRE OUT

STANDARD

WIRE TO

CONTROLLED

EQUIPMENT

LEADWIRE WITH 1/4

IN. (6.4 MM) MALE SPADE TERMINAL

(FORCE SPADE TO

BOTTOM OF CAVITY)

11,204B

L4064 may also be swivel-mounted. The swivel bracket requires a 1-9/16 in. (39.7 mm) hole in the plenum (Fig. 2).

1. Use bracket as a template to mark the location of mounting holes in plenum. Drill or punch holes for mounting screws.

2. Fasten the brackets in place with furnished screws. Start the screws but do not tighten.

3. Insert element tube through bracket, straighten controller, and fasten. Tighten the mounting screws securely. It may be necessary to rotate the bracket to tighten all screws securely.

5. Insert element tube with adapter through bracket, straighten controller and fasten. Tighten setscrew. Be sure screw strikes bushing not coiled bimetal sensing element.

FURNACE

PLENUM

32612A SWIVEL

BRACKET

REQUIRE 1-9/16

IN. (39.7 MM)

DIAMETER HOLE

IN PLENUM

FURNACE

PLENUM

Fig. 2 - Swivel mounting requires a 1-9/16 in. (39.7 mm) diameter mounting hole for element insertion.

RIGID BRACKET MOUNTING

WARNING

When mounting control on bracket, setscrew must

not

strike tube frame

sensing element to prevent

bypassing the safety limit function.

L4064 may be mounted using a rigid bracket. The rigid bracket requires a hole 13/16 in. (20.6 mm) diameter for element insertion (Fig. 3).

1. Use bracket as a template to mark the location of mounting holes in plenum. Drill or punch holes for mounting screws.

2. Fasten bracket in place with furnished screws. Tighten the screws securely.

3. Insert element tube through bracket, straighten controller and fasten by tightening setscrew. Be sure screw strikes tube frame and does not strike sensing element.

4. For replacement installations with existing 1 in. (25.4 mm) diameter hole. SUPER TRADELINE models are supplied with split steel bushings and wire snap ring. Follow the instructions below for using the steel bushing adapter.

STEEL BUSHING ADAPTER

1. Insert one-half of the split steel bushing (Fig. 4), through the wire ring. It may be necessary to spread the ring slightly.

2. Insert the other half of the steel bushing into the ring making sure tabs and ears are at the same ends.

3. Place bushing assembly on element, ear end first.

4. Holding bushing at seams, push firmly to the control end of element.

11,220

SETSCREW

RIGID BRACKET

11,205

Fig. 3 - Rigid bracket mounting requires a hole 13/ 16 in. (20.6 mm) diameter for element insertion.

TAB

L4064 HELICAL ELEMENT

EAR

2696A

Fig. 4 - Using SUPER TRADELINE adapter.

WIRING

Disconnect power supply before beginning installation to prevent electrical shock or equipment damage. All wiring must comply with local electrical codes and ordinances or in the absence of local codes with the National Electrical Code ANSI C1-1981-NFPA 70. Follow burner or furnace manufacturer’s instructions if available; otherwise, see Fig. 10 and proceed as follows.

IMPORTANT

The brass jumper is the breakaway type. It must be removed when the limit is used in the low voltage circuit. To remove jumper, break with a needlenose pliers and remove completely, Once removed, it is not replaceable. See Fig. 8 for location.

The slotted knockouts on the bottom of the case and the strain relief bushing are provided to simplify the installation procedure and to protect the wires.

1. To remove the slotted knockout(s), use a needlenose pliers as shown in Fig. 5 and pull straight down.

2. If cable is used, we recommend using a strain relief bushing in the knockout (Fig. 6). Pass the wires through bushing before connecting.

2 69-0117-3

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