Honeywell L4064B, L4064R Installation Instructions Manual
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).
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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