Hubbell D Bedienungsanleitung

OPERATING AND MAINTENANCE MANUAL FOR

ELECTRIC STAINLESS STEEL HEATER

FOR DEIONIZED (DI) WATER

ELECTRIC HEATER COMPANY

BASE MODEL “ D ”

HUBBELL

ELECTRIC HEATER COMPANY

P.O. BOX 288

STRATFORD, CT 06615

PHONE: (203) 378-2659

FAX: (203) 378-3593

INTERNET: http://www.hubbellheaters.com/

-- IMPORTANT --

Always reference the full model number and serial number when calling the factory.

WARNING / CAUTION

1. Tank is to be completely filled with water and all air is to be vented before energizing.

2. Due to the rigors of transportation, all connections should be checked for tightness before heater

is placed in operation.

3. Safety relief valve must be installed in tapping provided.

4. The refractory material used in heating elements may absorb some moisture during transit,

periods of storage, or when subjected to a humid environment. This moisture absorption results

in a cold insulation resistance of less than twenty(20) megohms. If this heater has been

subjected to the above condition, each heating element must be checked for insulation

resistance before energizing. A low megohm condition can be corrected by removing the

terminal hardware and baking the element in an oven at 350°F -700°F for several hours or until

the proper megohm reading is obtained.

5. KEEP AWAY FROM LIVE ELECTRICAL CIRCUITS.

Do not perform any maintenance, make any adjustments, or replace any components inside the

control panel with the high voltage power supply turned on. Under certain circumstances,

dangerous potentials may exist even when the power supply is off. To avoid casualties, always

turn the power supply safety switch to off, turn the charge or ground the circuit before

performing any maintenance or adjustment procedure.

6. The unit is designed to operate at pressure not more than 150 psi.

7. Generalized instructions and procedures cannot anticipate all situations. For this reason, only

qualified installers should perform the installations. A qualified installer is a person who has

licensed training and a working knowledge of the applicable codes regulation, tools, equipment,

and methods necessary for safe installation of an electric resistance water heater. If questions

regarding installation arise, check your local plumbing and electrical inspectors for proper

procedures and codes. If you cannot obtain the required information, contact the company.

TABLE OF CONTENTS

SECTION TITLE PAGE #

I GENERAL DESCRIPTION AND CONSTRUCTION 5

II INSTALLATION 9

III SCHEDULED MAINTENANCE AND OPERATION 12

IV TROUBLESHOOTING 14

V SERVICING AND REPLACEMENT OF PARTS 16

VI MISCELLANEOUS CHARTS AND FORMULAS 23

SECTION I - GENERAL DESCRIPTION AND CONSTRUCTION

GENERAL DESCRIPTION

This booklet describes an electric heater designed specifically for use in deionized (DI) water

applications. The complete assembly consists of a type 316L stainless steel storage tank, type 316L

stainless steel immersion electric heating element(s), thermostat, safety relief valve, safety high

temperature cut out, magnetic contactor(s), and any other required electrical operating control.

Optional equipment may be supplied with your unit. Please consult the product drawing for details

specific to your assembly. The unit is factory assembled, insulated, jacketed, wired, tested, and ready

for electrical and plumbing service connections.

CONSTRUCTION

TANK

The storage tank is constructed of type 316L stainless steel for maximum tank longevity. The tank is

formed by all welded construction and is designed for a maximum allowable working pressure of 150

psi (300 psi TP). As an optional, the tank may be supplied with a passivated / electropolished finish.

TANK CONNECTIONS

The heater is supplied with separate connections for the cold water inlet and the hot water outlet. Water

entering the cold water inlet is deflected by means of a baffle within the tank. A ¾-inch FNPT

connection is provided for mounting a combination safety temperature and pressure relief valve. An

overflow line should be utilized from the relief valve outlet to a floor drain. See drawing for locations

and sizes.

HEATING ELEMENT

The water heater is supplied with an electric immersion heating element assembly(s), composed of type

316L stainless steel sheathed elements that are welded into a stainless steel flange. Each assembly is

fastened to a corresponding tank flange using a Teflon gasket and four (4) 3/8-16 x 1-inch long hex

head steel bolts and nuts. See drawing for voltage and power ratings.

CONTROL THERMOSTAT

The water heater is supplied with a single stage immersion thermostatic

switch that is installed and wired at the factory. The thermostat can be

adjusted through a range of 100° - 195° F, (an optional low range, 30° -

110° F, is available), and is adjustable with a flat tip screwdriver. Other

thermostatic controls are available, see Options below.

TEMPERATURE HIGH LIMIT SWITCH

As a safety device, either a surface mounted high temperature cut-off switch with manual reset, factory

set at 205° F, or an optional immersion high temperature cut-off switch with manual reset, adjustable

through a range of 100° - 240° F, is provided. In the event of an over-temperature condition, the

thermostat will disengage the power from the system. The high limit must be manually reset thereafter

to restart the heater.

ManualReset

Surface Mounted High

TemperatureCut-OffSwitch ImmersionHighTemperatureCut-OffSwitch

MAGNETIC CONTACTOR

The magnetic contactor(s) is a heavy-duty resistive load type

rated for 100,000 cycles. The contactor supplies power to the

heating element(s) based on the resistive load (non-inductive) of

the heater only when the thermostatic switch is engaged, thereby

pulling in the contacts until the desired temperature is reached.

At this point, the contacts will drop out, which in turn

disconnects power from the elements. Magnetic contactors are

installed only on units rated greater than 6kW.

OUTER SHELL AND INSULATION

The tank is encapsulated in 2-inches of high-density fiberglass insulation. The protective shell is

constructed of galvaneel and is coated with a durable silver hammertone finish.

OPTIONS

The following optional features may be included in your water heater. Reference included drawing

specific to your heater for further details.

Low Water Cut-Off

Used as a safety device, the float type (316 stainless steel) low water cut-off is used to detect a low

water situation and disengage the

operating coils in the magnetic

contactor(s). Once the condition is

remedied, the low water cut-off switch is

automatically reset. This type of low

water cut-off uses a 316 stainless steel

float.

Fused Low Voltage Transformer

A fused low voltage transformer may be supplied. This option

is provided only in 480-volt systems with low water cut-offs to

step down the voltage to 240-volt for safety when working with

control circuits. As an option, a transformer may be installed on

any unit to step down the voltage to 120-volts

Stainless Steel Outer Jacket

An optional stainless steel outer jacket may replace the standard

galvaneel jacket.

Optional Connections

Flanged inlet and outlet connections (150#)

Threaded inlet and outlet connections (1 ½”, 2” MNPT)

Sanitary Connections

NEMA 4 or NEMA 4X Electric Control Panel

A NEMA 4 control panel may be supplied to provide watertight construction for installation in “wet”

areas.

Individually Fused Elements

To prevent the possibility of damage to control circuits and other elements in case of electrical

overloads, fuses may be supplied for each circuit. Two types of fuses may be used; a type NON for

voltages less than 250-volt or type JJS for voltage less than 600-volt.

Type JJS Type NON

Digital Display

A 1/16 DIN electronic temperature control package may

be installed. A separate manufacturer’s operating

manual will be supplied with the unit.

Stainless Steel Pressure-Only Relief Valve

Optionally, a ¾” NPT, type 316 stainless steel pressure-only relief valve may be supplied, as shown

below.

SECTION II – INSTALLATION

WARNING / CAUTION

DO NOT TURN ON THE ELECTRIC POWER SUPPLY to this equipment until heater is

completely filled with water and all air has been released. If the heater is NOT filled with water when

the power is turned on, the heating elements will burn out.

For protection against excessive pressures and temperatures, local codes require the installation of a

temperature-and-pressure (T&P) relief valve certified by a nationally recognized laboratory that

maintains periodic inspection of production of listed equipment of materials, as meeting the

requirements for Relief Valves and Automatic Gas Shutoff for Hot Water Supply Systems. ANSI

Z21.22-1971. THE CUSTOMER IS RESPONSIBLE TO PROTECT PROPERTY AND

PERSONNEL FROM HARM WHEN THE VALVE FUNCTIONS.

All water heaters have a risk of leakage at some unpredictable time. IT IS THE CUSTOMER'S

RESPONSIBILITY TO PROVIDE A CATCH PAN OR OTHER ADEQUATE MEANS, SO THAT

THE RESULTANT FLOW OF WATER WILL NOT DAMAGE FURNISHINGS OR PROPERTY.

WATER HEATER PLACEMENT

1. Place the heater on a solid foundation in a clean, dry location nearest to the point of hot water

use.

2. The water heater should be protected from freezing and waterlines insulated to reduce energy

and water waste.

3. Leave a minimum of 18” clearance for element withdrawal, if necessary.

4. Do not install in an area where flammable liquids or combustible vapors are present.

PIPING INSTALLATION

NOTE: The most effective means for preventing deterioration from accelerated corrosion due to

galvanic and stray current is the installation of dielectric fittings/unions. The installation of these

fittings is the responsibility of the installing contractor.

1. Connect the cold water inlet and hot water outlet to the appropriate connections as shown;

refer to the drawing for location and sizes.

2. Install the combination temperature and pressure safety relief valve in the tapping provided.

Note that this is required by law for safety considerations.

Outlet to floor drain Install into provided tapping

Manual Release

Lever

Temperature and Pressure Relief Valve

3. Install a relief valve overflow pipe to a nearby floor drain. CAUTION: No valve of any type

should be installed between the relief valve and tank or in the drain line.

FILLING THE HEATER

1. Open the pressure relief valve test lever to allow air to escape.

2. Open the valve to the cold water inlet and allow the heater and piping system to completely

fill, as indicated by a steady flow of water from the relief valve.

ELECTRICAL INSTALLATION

1. Enter electric enclosure with properly sized feeder leads. Single-phase installations require

two (2) leads; three phase installations require three (3) leads.

2. Install these power leads into the box lugs on the terminal block or magnetic contactor. See

wiring diagrams below.

3. Torque screws per torque chart included in Section VI.

4. All other electrical connections are made at the factory; therefore, no other electrical

connections are necessary.

Temperature Probe

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