Owner manual

ManualsBrandsBell & Gossett ManualsAir equipmentHS 504F Series 1141 Temperature Regulators

INSTRUCTION MANUAL

HS-504

REVISION F

Hoffman Specialty

Series 1140 and 1141

Temperature Regulators

CAUTION

• FOLLOW ALL INSTALLATION AND

OPERATING INSTRUCTIONS.

• TURN OFF WATER OR STEAM

BEFORE SERVICING.

• WEAR HEAT-RESISTANT GLOVES

BEFORE MAKING ADJUSTMENTS.

• OPEN SUPPLY VALVES SLOWLY TO

PREVENT WATER HAMMER OR

SUDDEN SHOCK.

• HANDLE REGULATOR WITH

EXTREME CAUTION. DO NOT LIFT

REGULATOR BY ANY EXTERNAL

TUBING. DO NOT KINK OR TWIST

TUBING AND AVOID BENDING IT ON

A RADIUS LESS THAN 4" (100 mm).

• THE SENSING BULB MUST NOT BE

EXPOSED TO TEMPERATURES THAT

EXCEED THE RANGE LISTED ON THE

NAME PLATE.

• ALARMS OR CUT-OFFS SHOULD BE

INSTALLED ON CRITICAL

APPLICATIONS TO INDICATE

REGULATOR FAILURE. A LEAK

COULD CAUSE THE ACTUATOR TO

LOSE ITS CHARGE AND CAUSE THE

SYSTEM TO OVERHEAT.

• FAILURE TO FOLLOW THIS CAUTION

MAY RESULT IN PROPERTY DAMAGE

OR PERSONAL INJURY.

IMPORTANT: If you are uncertain as to the product’s

daptability for your application, please call the factory or

an authorized representative before installing or using the

product.

IMPORTANT: Do not install Series 1141 Temperature

Regulators in applications where ambient temperature

exceeds the regulator's set control temperature.

Summary of content (12 pages)

PAGE 1
INSTRUCTION MANUAL HS-504 REVISION F Hoffman Specialty® Series 1140 and 1141 Temperature Regulators ! CAUTION • FOLLOW ALL INSTALLATION AND OPERATING INSTRUCTIONS. • TURN OFF WATER OR STEAM BEFORE SERVICING. • WEAR HEAT-RESISTANT GLOVES BEFORE MAKING ADJUSTMENTS. • OPEN SUPPLY VALVES SLOWLY TO PREVENT WATER HAMMER OR SUDDEN SHOCK. • HANDLE REGULATOR WITH EXTREME CAUTION. DO NOT LIFT REGULATOR BY ANY EXTERNAL TUBING. DO NOT KINK OR TWIST TUBING AND AVOID BENDING IT ON A RADIUS LESS THAN 4" (100 mm).
PAGE 2
OPERATING PRINCIPLE This Series 1140 regulator automatically controls the flow of steam, water or other medium passing through its valve by responding to temperature changes at the bulb. The bulb contains a liquid which vaporizes when heated. Vapor pressure generated in bulb is transmitted through the capillary tubing to the flexible bellows which moves the valve disc or plunger controlling the flow of the medium through the valve.
PAGE 3
BULB INSTALLATION IMPORTANT: Installing the bulb in the correct location and position is extremely important. The bulb should be installed at a point of actual system temperature and it must be fully inserted in the fluid being controlled. Tanks - the bulb should be located approximately 2/3 the way up and off to a side of the tube nest. Bulbs should be above the heating surface and no closer than 4" (100 mm) at any point.
PAGE 4
THERMOSTATIC BULB INSTALLATION Figure No. 7 - Three-Way Valve FOR THREE-WAY VALVES 1. Install the bulb as close as possible to the outlet of the mixed water line. See Figure No. 7. 2. Immerse bulb as far as possible into the pipeline. HOT ALL INSTALLATIONS The capillary tubing is the flexible tubing that connects the bulb and the valve. IMPORTANT: Capillary tubing may only be bent on a 4" (100 mm), or larger radius. It must never be cut, kinked, smashed or twisted. 1.
PAGE 5
TEMPERATURE ADJUSTMENT This regulator can be set to control at any temperature within the limits of the temperature range stamped on the name plate. After placing the regulator in service, allow about 15 –30 minutes to reach stable operation, then watch temperature, if not correct change temperature setting as outlined hereafter. Make new settings as necessary until desired temperature is obtained. Allow about 15 –30 minutes between changes. Oversized valves will cause extreme temperature fluctuations.
PAGE 6
CHANGING A THERMOSTATIC ACTUATOR ON TWO-WAY VALVES The Thermostatic Actuator used on the Series 1140 regulators is shown in Figure No. 11. All actuator parts shown form one inseparable unit, except for the bulb bushing with its gasket and fastening screws. The Thermostatic Actuator will only control within the temperature range stamped on the name plate, which is fastened to the bellows housing.
PAGE 7
CHANGING A THERMOSTATIC ACTUATOR ON THREE-WAY VALVES ! CAUTION ALL SUPPLY VALVES MUST BE TURNED OFF, SYSTEM PRESSURE MUST BE REDUCED TO 0 psi (0 bar), AND SYSTEM TEMPERATURE MUST BE REDUCED BELOW 100˚F (38˚C) BEFORE REMOVING THE BULB. FAILURE TO FOLLOW THIS CAUTION MAY RESULT IN SERIOUS BURNS. 1. Secure all water to valve and outlet from valve. 2. Drain pipe line below location of thermostatic bulb, if no well is used. 3.
PAGE 8
TO CHECK THE OPERATION OF A THREE-WAY VALVE USED AS A MIXING VALVE PROCEED AS FOLLOWS: THREE WAY MIXING VALVES IMPORTANT: When installing a three-way mixing valve, it is necessary that return circulation be piped to feed the cold water side of the mixing valve and heater. See Figure No. 13. As the temperature of the mixed liquid increases, the piston moves toward the hot seat port B. See Figure 3 on page 2. This movement decreases the hot flow and increases the cold flow through port C.
PAGE 9
START UP PROCEDURE 1. Make sure inlet gate valve is closed. 2. Open outlet gate valve and all equipment drain valves. Allow system to drain completely. 3. Make sure bypass globe valve (if provided) is tightly closed. 4. Release any spring force on temperature adjusting knob. Knob should be at the lowest temperature setting for initial system startup. 5. Slightly open inlet valve (just enough to allow steam or water into regulator). Do not allow pressure to build up.
PAGE 10
Problem: 2. System Temperature High a. Cause: Bypass gate valve is open. Solution: Close the valve. b. Cause: Capillary has kink. Sharp bend will stop signal to pilot. Solution: Replace actuator or work out by hand. c. Cause: Actuator range incorrect. The actuator will not operate beyond its range. Solution: Check name plate for correct temperature range. Replace if necessary. d. Cause: Temperature adjustment altered. Solution: Readjust to desired operating condition. e. Cause: Oversized valve.
PAGE 11
TYPICAL INSTALLATIONS Figure No. 15— Controlling steam coil in storage tank HOT WATER OUTLET RELIEF VALVE THERMOSTATIC BULB TEMPERATURE REGULATOR STORAGE HEATER "Y" STRAINER VACUUM BREAKER STEAM INLET DRIP TRAP TO TRAP COLD WATER INLET DRAIN AND BLOW-OFF Figure No. 16 — Controlling instantaneous water heater with or without buffer storage tank.
PAGE 12
Figure 18 — Controlling hot water plus tempered water at a lower temperature REGULATOR WITH 3-WAY VALVE CHECK VALVE THERMOMETER HOT WATER CHECK VALVE THERMOMETER TEMPERED WATER Figure 20 - Controlling storage tank temperature with a diverting valve and heat exchanger THERMOSTATIC BULB TEMPERATURE REGULATOR "Y" STRAINER STEAM INLET HEAT EXCHANGER “B” TEMPERATURE REGULATOR WITH BODY CODE 06 THERMOSTATIC BULB DRIP TRAP HEATER CIRCULATING PUMP TO TRAP RETURN CHECK VALVE CIRCULATOR STORAGE TANK THER