United Electric Controls H119, 119 Series, F119, F119A, H119A Installation And Maintenance Instructions Manual

Installation & Maintenance Instructions

H119 S E R I E S

Pressure & Temperature Switch

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Pressure

Pressure controls may be mounted via two mounting
slots for #10 screws in the enclosure or directly to a rigid
pipe using the pressure connection. Low pressure units,
models 520-535, are also available with an optional sur­face mounting bracket. Always use a wrench to tighten
pressure connection to the pipe. To prevent damaging
pressure sensor, use a backup wrench to hold the hex
nut in place when surface mounting.

Temperature

Temperature controls must be surface mounted via #10
screw slots. For remote bulb temperature controls, fully
immerse bulb and 6” of capillary in the control zone for
most efficient control. Best control is usually obtained
by placing the bulb close to the heating or cooling
source in order to sense temperature fluctuations quick­ly. Be sure to locate bulb so that it will not be exposed
to temperature beyond the instrument range limits.

WIRING

WIRE IN ACCORDANCE WITH LOCAL AND
NATIONAL CODES.

DISCONNECT ALL SUPPLY CIRCUITS BEFORE
WIRING.

ELECTRICAL RATINGS STATED IN LITERATURE

AND ON NAMEPLATE SHOULD NEVER BE
EXCEEDED. OVER-LOAD ON A SWITCH CAN CAUSE
FAILURE ON THE FIRST CYCLE.

1/2” NPTM conduit connection is provided on top of the
unit with 18” leadwires. Unit is available with SPDT or
DPDT (119A) operation. External grounding screw and
clamp (GND symbol is cast into enclosure) is provided.

UNITED ELECTRIC

CONTROLS

Installation and Maintenance
Instructions

IM119

Please read all instructional literature carefully and thoroughly before starting. Refer to the final page for the listing of
Recommended Practices, Liabilities and Warrantees.

119 Series
Pressure and Temperature
Switches

Types H119, H119A, F119,
F119A

UL & CSA Listed Switch Capsule Div.1 & 2 Class I Groups A,
B, C & D Class II Groups E, F, G; and Class III
CENELEC EExd IIC T6 per EN 50 014/50 018

Part I - Installation

Leadwires to the terminal block are color coded:

SPDT DPDT

SWT1 SWT2

Common Brown Brown Yellow
Normally Closed Red Red Black
Normally Open Blue Blue Violet
Ground Green Green

GENERAL

Pressure

Types H119 and H119A controls are activated when a
diaphragm sensor responds to a pressure change. This
response, at a predetermined set point, actuates a SPDT
or a DPDT snap acting switch, converting a pressure sig­nal into an electrical signal. Control set point may be var­ied by turning the internal slotted adjustment screw bush­ing according to procedures outlined in this document.
(See Adjustment Procedures-Pressure Models PART II)

Temperature

Types F119 and F119A (Bulb and Capillary) controls
sense temperature variations with a liquid filled sensing
bulb. Liquid expansion or contraction is hydraulically
transmitted to a diaphragm which actuates a SPDT or a
DPDT snap action switch at a predetermined set point,
converting a temperature signal into an electrical signal.
Set point is adjusted by turning the internal hex adjust­ment screw according to procedures outlined in this docu­ment. (See Adjustment Procedures-Temperature Models
PART II)

Tools Needed

1 1/16” Open End Wrench

Flat Head Srewdriver

MOUNTING

INSTALL UNIT WHERE SHOCK, VIBRATION AND

TEMPERATURE FLUCTUATIONS ARE MINIMAL.
ORIENT UNIT SO THAT MOISTURE IS PREVENTED
FROM ENTERING THE ENCLOSURE. IF UNIT IS
BEING INSTALLED WHERE HEAVY CONDENSATION
IS EXPECTED, VERTICAL MOUNTING (PRESSURE
CONNECTION DOWN) IS REQUIRED. DO NOT MOUNT
UNIT IN AMBIENT TEMPERATURES EXCEEDING PUB­LISHED LIMITS. CONTROLS MAY BE MOUNTED AND
OPERATED IN ANY POSITION.