Honeywell L4080 Installation Manual

THE L4080 AND L8080 ARE IMMERSION
TYPE CONTROLLERS FOR HYDRONIC

HEATING SYSTEMS THAT TURN OFF THE
BURNER WHENEVER THE BOILER WATER

TEMPERATURE RISESTOTHESET POINT.

0 L4080 High Limit Aquastat Controller has
adjustable set point.

Cl L4080 models available for use with

immersion wells or for direct immersion if

faster response is needed.

0 A factory-set stop is available on L4080 to
prevent setting the control at too high a
temperature.

-

0

Cl L4080 models available with second limit
switch to shut off all gas to the burner.

III L8080 EC0 gas shutoff has fixed set point.

0 Liquid fill in sensing element expands as
the boiler temperature rises.

Cl At the set point temperature, a diaphragm­actuated snap switch breaks the power

supply to the burner primary control.

SM.

REV. 4-66m

Form Number 60-2101-2

@Honeywell Inc. 1966

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SPEClFICATIONS

THE SPECIFICATIONS GIVEN IN THIS PUBLICATION DO NOT INCLUDE NORMAL MANUFACTURING TOLERANCES.
THEREFORE, THIS UNIT MAY NOT MATCH THE LISTED SPECIFICATIONS EXACTLY. ALSO, THIS PRODUCT IS TESTED AND
CALIBRATED UNDER CLOSELY CONTROLLED CONDITIONS, AND SOME MINOR DIFFERENCES IN PERFORMANCE CAN BE
EXPECTED IF THOSE CONDITIONS ARE CHANGED.

CASE

MODEL

NUMBER

-~
L408OB

L4080D

L408OF

L4080G

DESCRIPTION

High Limit

Aquastat

Controller

High Limit

Aquastat

Controller

Dual Limit

Aquastat

Controller

Dual Limit

Aquastat

Controller

AND

COVER

Yes

No

Yes

No

IMPORTANT

TABLE I-MODELS

IMMERSION STANDARD

WELL

Yesa

Yesa

Yes

Yes

Yes

RANGE

180Fto240F[82C
to 116 C]; dial
marked in 10 F
[5.6 C] increments.

180Fto240F[82C

to 116 C]: dial

marked in 10 F
[5.6 C] increments.

180 F to 240 F [82 C
to 116 C]; dial
marked in 10 F
[5.6 C] increments;

stop set at 210 F

[98.9 C].

140Fto240F[60C

to 116 C], dial

marked in 10 F

15.6 C] increments;
stop set at 210 F
[98.9 C].

Factory-set, 200 F
[93 C]. Non­adjustable.

OPTIONAL

RANGES

140Fto240F[60Cto116C];
dial marked in 10 F [5.6 C]
increments.

120Fto160F[49Cto71 C];
dial marked WARM-NORMAL­HOT.

Stop set at 150 F, 200 F, or
220 F [66 C, 93 C, or 104 Cl.

140Fto240F[60Cto116C],
dial marked in 10 F [5.6 C]
increments.

-

-

-

aOn select Band D models, well must be ordered separately. Refer to form 68-0040, “Wells and Fittings for Temperature

Controllers,” to order well, if necessary

V?WiRING INFORMATlON

WHEN PURCHASING REPLACEMENT AND MODERNIZATION PRODUCTS FROM YOUR TRADELINE
WHOLESALER OR YOUR DISTRIBUTOR, REFER TO THE TRADELINE CATALOG OR PRICE SHEETS FOR
COMPLETE ORDERING NUMBER, OR SPECIFY-

1. Order number.

2. Control range (LSOSO only).

IF YOU HAVE ADDITIONAL QUESTIONS, NEED FURTHER INFORMATION, OR WOULD LIKE TO COMMENT ON OUR
PRODUCTS OR SERVICES, PLEASE WRITE OR PHONE:

1. YOUR LOCAL HONEYWELL RESIDENTIAL SALES OFFICE (CHECK WHITE PAGES OF YOUR PHONE DIRECTORY).

2. RESIDENTIAL DIVISION CUSTOMER SERVICE
HONEYWELL INC., 1885 DOUGLAS DRIVE NORTH

MINNEAPOLIS, MINNESOTA 55422-4386 [phone]
IN CANADA-HONEYWELL CONTROLS LIMITED/HONEYWELL LIMITEE, 740 ELLESMERE ROAD, SCARBOROUGH,

ONTARIO MlP 2V9. INTERNATIONAL SALES AND SERVICE OFFICES IN ALL PRINCIPAL CITIES OF THE WORLD.

3. Dlfferentlal.

4. Optional specifications.

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SWITCH ACTION: Breaks contact on temperature rise to

set point.

DIFFERENTIAL: Approximately 15 F [8.3 C] non-

adjustable. Special models available with 8 F (4.4 C]

differential.

ELECTRICAL RATINGS (A):

I L4080 I L8080

Inductive

0.25 to 12 Vdc
Powerpile

Second Limit (bimetal switch) on L4080F,G:

Powerpile 750 mV at 0.4 A.
Thermocouple 30 mV at 0.4 A.

PRESSURE RATINGS: 225 psi [1551 kPa] with immersion

well.

MAXIMUM TEMPERATURE RATING: 40 F [22 C] above

set point, or 265 F [129.4 C], whichever is lower.
DIMENSIONS: See Fig. 1.
INSERTION DEPTH: See Fig. 1.
MOUNTING MEANS: Mounts in well.

I 24Vac i 50~~ i

1 0.25 i -

-

50 VA

750 mVdc

SPECIFICATIONS OF SECOND LIMIT (L4080F.G):

Leadwires: No. 14 stranded wire, l/32” insulation,

Underwriters Laboratories and Canadian
Standards Association approved for 105 C [221 F]
service.

Ending: l/4” brass, tin plated female quick-connects,

crimped and soldered to leadwires; quick­connects insulated with nylon housing.

Length: 39” f 1” from end to end (tip of switch to tip of

quick connect).

Functional Length (exposed length): 34-l 12” (l-l /2”

insulation) or 33” (3” insulation).

Bimetal Switch: Powerpile 750 mV at 0.4 A; ther-

mocouple 30 mV at 0.4 A.

OPTIONAL SPECIFICATIONS:

-3/4 in. [19.1 mm] spud.

-3 in. [76.2 mm], 3-5/E in. [92.1 mm], or 5 in.
[127.0 mm] insertion depth.

-45 degree quick-connect terminals.

-control range (Table 1).

-plastic tubing over well.

UNDERWRITERS LABORATORIES INC. LISTED:

L4080B,D,F,G models with well-File No. MP466.

Guide No. MBPR; models less well-File No.
MP466, Guide No. MBPR2.

CANADIAN STANDARDS ASSOCIATION CERTIFIED:

L4080D-File No. LR1620, Guide No. 400-E-0.

AMERICAN GAS ASSOCIATION DESIGN CERTIFIED:

L408OB,D-Test Report 23-l 1 B.
L8080A-Test Report 22-l 5A.

FIG. l- L408OB,F AND L8080A INSTALLATION DIMENSIONS IN in. [mm in brackets].

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60-2101-2