Product Data

L404A,B PRESSURETROL® CONTROLLERS
L404A,B
1/4-18 NPT
1
1
1
4-1/2 (114.3) (COVER)
4-11/32 (110.3) (CASE)
3/16 (4.8) X 21/64 (8.3)
KNOCKOUT (2)
1-15/16 (49.2)
3-3/16 (81.0)
1-5/32
(29.4)
2-1/8 (54.0)
2-3/4 (69.9)
1-61/64 (49.6)
1-13/16
(46.0)
1-1/16
(27.0)
13/16
(20.6)
1/2 (12.7)
3-7/8
(98.4)
7/8
(22.2) DIA.
1-1/2 (38.1)
1-3/16 (30.2)
1-1/16
(27.0)
13/16
(20.6)
4-31/3
2
(126.
2)
3-23/32
(94.5)
RESET LEVER (ON MANUAL RESET MODELS ONLY.)
M19534
Fig. 1. Mounting dimensions of the L404A,B Pressuretrol® Controllers in in. (mm).
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, flame
safeguard control technician.
4. After installation is complete, check out product
operation as provided in these instructions.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect the power supply before beginning
installation to prevent electrical shock or possible
equipment damage.
CAUTION
Equipment Damage Hazard.
Improper use with a compressor can damage the
controller.
When using the controller with a compressor, install a
dampening device (such as a needle valve, header, or
surge tank) to dampen pulsations that can damage the
controller or reduce its life.
IMPORTANT
1. Locate the controller where the ambient temperature
will not exceed 150°F (66°C).
2. Use pipe compound sparingly to avoid clogging the
hole in the pipe or diaphragm fitting.
3. Do not tighten the controller by hand by holding the
case.
4. Accurately level the controller for proper operation.
95C-10187B–1 4