Honeywell L4064B, L4064R Installation Instructions Manual

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69-0115-11

L4064B, L4064R

WARNING

CAUTION

Universal Combination Fan and Limit Controllers

INSTALLATION INSTRUCTIONS

APPLICATION

INSTALLATION

These combination warm air fan and limit controllers are suitable for various types of forced air heating systems. The controllers have 2 switches; one which opens the limit circuit if the plenum temperature exceeds the preset safety limit; it resets automatically. The other switch turns the fan on and off. The fan is turned on and off according to plenum temperature. The L4064R has a special high temperature range suitable for gravity heating systems. All models may be used as limit controllers by wiring only the limit side. Limit contacts are suitable for both line voltage and low voltage. For low voltage applications, the brass jumper must be removed.

OPERATION

As the plenum temperature rises, the coiled bimetal sensing element of the control warps and mechanically makes the fan contacts (at the FAN ON temperature setting). During normal operation, the call for heat ends before the LIMIT setting is reached and the fan contacts break as the plenum temperature falls and the FAN OFF setting is reached. If the call for heat continues until the temperature in the plenum rises to the LIMIT setting, the bimetal element will mechanically break the limit contacts and de-energize the heating control circuit.

When Installing this Product...

1. Read these instructions carefully. Failure to fol-

low 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. For 230 VAC application, use of double insu-

lated cable is required.

5. After installation is complete, check out product

operation as provided in these instructions.

If limit switch is used on a low voltage circuit, failure to remove brass jumper can cause electrical shock hazard and/or damage to low voltage controls.

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. Maximum element temperature is: L4064B—350 ºF (177 ºC). L4064R—250 ºF (121 ºC) above limit setting. Maximum switch temperature is: L4064B,R—190 ºF (88 ºC).

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L4064B, L4064R UNIVERSAL COMBINATION FAN AND LIMIT CONTROLLERS

M31164

FURNACE PLENUM

REQUIRE 1-9/16 IN [39.7mm] DIAMETER HOLE IN PLENUM

32612A SWIVEL BRACKET

Do not exceed the following electrical ratings (amper es):

Table 1. Electrical Ranges

120 Vac 240 Vac

FAN LIMIT FAN LIMIT

Full Load 14 8 7 4

Locked Rotor

Pilot Duty: 2 A at 24 Vac; 0.25 A at 0.25 to 12 Vdc. Maximum Combined Connected Load: 2000 VA. 75 ºC (167 ºF) (min.) field wiring required. Wiring must conform to NEC Class 1 requirements.

Approval

—IP20 compliance — Classified as TR/TW — CSA certified file #095329 — UL listed file #MP3387 — DVGW certified ID-No:

CE-0085BM0320 for B type only

84 48 42 24

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 ºF (88 ºC). If plenum surface temperature exceeds 190 ºF (88 ºC), heat insulating material or mounting bracket must be used.

Surface Mounting (Fig. 1)

L4064B—Hole in plenum should be just large enough to accommodate the 3/4 in.(19.1 mm) diameter element tube. A 13/16 in. (20.6 mm) diameter hole is recommended.

1. Remove cover by removing screw, 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 holes.

2. Punch or drill holes for mounting screws.

3. Place insulation between plenum and case

if necessary.

4. Fasten controller securely with mounting

screws.

Swivel Mounting (Fig. 2)

The L4064B and L4064R may be swivel-mounted. The swivel bracket requires a 1-9/16 in. (39.7 mm) hole in the plenum.

1. Use bracket as a template to make the location

of mounting holes in plenum. Drill or punch holes for mounting screws.

2. Fasten the bracket 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.

MOUNTING

The devices may be mounted as follows: L4064B — Swivel mount L4064R — Swivel mount

FURNACE PLENUM

ADD HEAT INSULATING MATERIAL IF NEEDED

M31163

Fig. 1. Surface mounting for L4064B requires a

69-0115—11 2

13/16 in. (20.6 mm) hole.

Fig. 2. Swivel mounting requires a 1-9/16 in.

(40 mm) diameter mounting hole for element

insertion.

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L4064B, L4064R UNIVERSAL COMBINATION FAN AND LIMIT CONTROLLERS

Fig. 3. Swivel mount (front view).

M34080

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 Cl-1981-NFPA

70. Follow burner or furnace manufacturer’s instructions if available; otherwise, see Fig. 5 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. 5 for location.

1. If cable is used, we recommend using a strain-

relief bushing in the knockout. Bushing is provided with control.

2. Refer to the following section for type of wiring

connections (standard wire push-in terminals or female receptacle).

L4064

FAN

JUMPER REMOVED

(HOT)

POWER

1 1

SUPPLY

LIMIT

SIDE

FAN MOTOR

ADD DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

TO CONTROLLED LOW VOLTAGE EQUIPMENT.

TO CONTROLLED LINE VOLTAGE EQUIPMENT.

L4064

FAN

LIMIT SIDE

FAN MOTOR

JUMPER IN PLACE

POWER SUPPLY

SIDE

Fig. 4. Wiring Diagram for L4064.

Wiring Connections

When connecting cable or conduit to this controller, use care to avoid strain on the control case. Connections can be made to standard wire push-in terminals or female receptacles for 1/4 in. (6.4 mm) male flag connectors on both the fan and limit switches (Fig. 5).

For Standard wire Push-in terminals

Connect wires to the terminals as follows:

1. Use Nos. 14,16, or 18 solid wire or Nos. 14 or 16

stranded wire, depending on electrical requirement.

2. Strip insulation from wires the distance shown

by the strip gauge on the controller. If wire insulation is 4/64 in. (2 mm) thick, strip additional 1/4 in. (6 mm) to ensure wire seats securely in push-in connectors.

L4064

FAN SIDE

FAN MOTOR

(HOT)

POWER SUPPLY

3. Solid wire may be inserted directly into the ter-

minal holes. If stranded wire is used, insert a small screwdriver into the slot next to the terminal. Push screwdriver in and hold while inserting wire into terminal (Fig. 5). Remove screwdriver. If stranded wire is solder-dipped, it can be pushed directly into terminal holes.

LIMIT SIDE

JUMPER REMOVED

24V120V

HEATING SYSTEM TRANSFORMER

M31165A

For Female Receptacles

It is recommended that the female receptacles be used for wiring accessory equipment; i.e., electronic air cleaner, humidifier, etc. Connect wires to the receptacles as follows:

1. Use Nos. 14 to 18 size wire, depending on elec-

trical requirement.

2. Attach 1/4 in. (6.4 mm) male flag connector to

each wire.

3 69-0115—11

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L4064B, L4064R UNIVERSAL COMBINATION FAN AND LIMIT CONTROLLERS

M33953

STRIP GAUGE

PUSH MAN PULL AUTO

LEADWIRE WITH 1/4 IN. [6.4mm] FEMALE SPADE TERMINAL (FORCE SPADE TO BOTTOM OF CAVITY)

FEMALE RECEPTACLE FOR CONNECTION OF 1/4 IN. [6.4mm] MALE SPADE TERMINAL (4)

STANDARD WIRE TO CONTROLLED EQUIPMENT

TO RELEASE STANDARD WIRE, PUSH SCREWDRIVER IN AND PULL WIRE OUT

WIRING GUARD

REMOVABLE BRASS JUMPER

STANDARD WIRE PUSH-IN CONNECTORS (4)

LIMIT

FAN

CAUTION

DO NOT ROTATE -- HOLD

DIAL WHEN SETTING POINTERS

150

100

200

LIMIT

OFF

FAN

250

M34064

2-3/8 (60)

1-29/32

(48)

5/16 (8)

4-9/32

(109)

DIM. A

1-1/32

(26)

3/4

(19)

STANDARD

1/2 (13)

3-23/32

(95)

3-1/4 (83)

3 (76)

1-3/16

(30)

1-3/16

(30)

5X 7/32

(6)

NOTE: OVERALL DEPTH WITH FAN SWITCH IS 2 IN. (51 MM) ON ALL MODELS.

1-19/32

(40)

2X 7/16 (12)

11-1/2 8 5

INSERTION [NOMINAL]

DIM. A

INCH (MM) INCH (MM)

(292) (203) (127)

11-5/8 8-1/8 5-1/8

(295) (206) (130)

3X 11/32 (9)

3. Push male flag connector directly into the

female receptacle. Make sure that the flag is forced to the bottom of cavity and wire is in the channel (Fig. 5).

Fig. 5. Location of Wiring Connections.

Fan Setting Adjustment

1. Move the FAN OFF lever to the temperature at

which the fan is to stop to prevent circulation of cool air.

2. Move the FAN ON lever to the temperature at

which the fan is to turn ON to circulate warm air.

Manual Fan Switch

For constant fan operation (overriding fan setting levers), push the FAN switch button in. For fan to cycle automatically, pull button out.

Limit Setting Adjustment

Move the limit lever to the temperature at which the high-limit switch will open to stop the burner.

CHECKOUT

When installation is complete, disconnect the fan motor circuit at the L4064. Turn on power and set thermostat to call for heat. Burner should come on and limit controller should shut burner off when plenum temperature reaches the limit set point. Turn off power, reconnect the fan switch, turn on power and again set thermostat to call for heat. The fan should start when plenum temperature has reached fan-on setting.

Fig. 6. L4064 Dimensions.

Home and Building Technologies

In the U.S.:

Honeywell

1985 Douglas Drive North

Golden Valley, MN 55422-3992

customer.honeywell.com