L4031A,C POOL HEATER AQUASTAT® CONTROLLER

60-2107—5 2
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
this unit may not exactly match the listed
specifications. 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.
Models:
L4031A Pool Heater Aquastat® Controller controls pool
water temperature and provides automatic reset high
limit boiler control.
L4031C Pool Heater Aquastat® Controller controls pool
water temperature and provides manual reset high limit
boiler control.

High Limit

Range:
L4031A: 100°F to 240°F (38°C to 116°C) (each division
represents 5°F degrees).
L4031C: 110°F to 290°F (43°C to 143°C) (each division
represents 5°F degrees).
Differential:
L4031A: Fixed 5°F (3°C).
L4031C: Manual reset.
Electrical Rating (A):
Differential:
L4031A: Fixed 2°F (1°C) or 5°F (3°C). When 5°F (3°C),
the electrical rating is the High Limit Electrical Rating.
L4031C: Fixed 5°F (3°C).
Electrical Rating:
L4031A:
Pilot Duty: 125 VA at 120 and 240 Vac.
Powerpile® (millivoltage): 0.25A at 0.25 to 12 Vdc.
L4031C: Same as high limit.
Bulb Mounting:
For list of compression fittings and immersion wells, refer to
form 68-0040, Wells and Fittings for Temperature Controllers.
Order separately.
Length of Capillary:
Standard, each 66 in. (1676 mm).
Case Dimensions:
See Fig. 1.
Switch Action:
Each control opens on a temperature rise.
Control Point Setting:
Visible scale that can be set with an external screwdriver
adjustment.
Finish:
Gray.
Mounting Means:
Three holes in back of case.
Wiring Knockouts:
Four, for 1/2 in. conduit.
Approvals:
Underwriters Laboratories Inc. Component Recognized:
File Number M466, Guide Number MBPR2.
American Gas Association Design Certified: Report 23-11B
(L4031A only).
Canadian Standards Association Certified: File Number
LR1620, Guide Number 400-E-O (L4031A only).

Pool Control

Range:
L4031A: 40°F to 180°F (4°C to 82°C) (each division
represents 5°F degrees).
L4031C: 100°F to 240°F (40°C to 116°C) (each division
represents 5°F degrees).
ORDERING INFORMATION
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. Compression fittings or immersion wells, if desired.
3. Optional specifications, if desired.
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 the white pages of your phone directory).
2. Residential Division Customer Relations
Honeywell, 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales
and Service offices in all principal cities of the world.
120 Vac 240 Vac
Full Load 8.0 5.1
Locked Rotor 48.0 30.6
Powerpile® (millivoltage) is 0.25A at 0.25 to 12 Vdc.