Hubbell T Bedienungsanleitung

OPERATING AND MAINTENANCE MANUAL FOR

COMMERCIAL INDIRECT POWERED WATER

HEATER

ELECTRIC HEATER COMPANY

BASE MODEL “ T ”

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. 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.

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

6. 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 8

III SCHEDULED MAINTENANCE AND OPERATION 12

IV TROUBLESHOOTING 15

V SERVICING AND REPLACEMENT OF PARTS 16

VI MISCELLANEOUS CHARTS AND FORMULAS 25

SECTION I - GENERAL DESCRIPTION AND CONSTRUCTION

GENERAL DESCRIPTION

This book describes a packaged boiler water powered indirect water heater that is a stationary, self-

contained unit. The complete assembly on a standard unit consists of the storage tank, immersion

heating coil, and an ASME rated combination temperature and pressure safety relief valve. 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 standard storage tank is constructed of steel and internally lined with specially formulated

Hydrastone cement to a ½-inch minimum thickness. The tank is designed for a maximum allowable

working pressure of 150 psi (300 psi TP).

TANK CONNECTIONS

The heater is supplied with separate cold water and hot water connections. Water entering the cold

water inlet is deflected by means of a baffle within the tank. The hot water outlet includes a built in heat

trap to prevent hot water from radiating out from the heater. A ¾-inch FNPT connection is located on

the side of the heater for mounting a combination safety temperature and pressure relief valve. An

overflow line should be installed from the relief valve outlet to a floor drain. A ¾-inch GHT connection

is supplied for draining. See drawing for locations and sizes.

OUTER SHELL AND INSULATION

The tank is encapsulated in 2-inch thick polyurethane foam insulation. The insulation is protected by a

high impact non-corroding colorized composite protective jacket.

HEATING COIL

The water heater is supplied with a high quality, factory installed, high efficiency, single walled,

copper finned heating coil designed for a maximum working pressure of 150 psi. The tubing is

installed in a heavy-duty fabricated steel head with threaded NPT connections. Each assembly is

fastened to a corresponding tank flange using a gasket and hex head steel bolts and nuts. Double

walled tubing may be supplied as an option.

CONTROL THERMOSTAT

The water heater is supplied with an immersion thermostatic

switch. The thermostat can be adjusted through a range of 120°

- 140° F.

OPTIONAL BACK-UP ELECTRIC HEATING SYSTEM

Back-up Electric Heating Element

The water heater may be supplied with an electric immersion heating element assembly(s). Each

assembly is fastened to a corresponding tank flange using a 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 may be supplied with either a surface mounted or immersion thermostatic switch to

control the back-up electric heating system. See drawing for specific details. The surface mounted

thermostat can be adjusted through a range of 110° - 170° F. The immersion thermostat can be adjusted

through a range of 100° - 190° F. Both thermostats are adjustable with a flat tip screwdriver.

Surface Mounted Thermostat

ImmersionThermostat

Temperature High Limit Switch

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

set at 190° F, or an immersion high temperature cut-off switch with manual reset, factory set at 180° F,

may be provided. In the event of an over-temperature condition, the thermostat will disengage the

power from the back-up electric heating system. The high limit must be manually reset thereafter to

restart the heater.

ManualReset

Surface Mounted High

TemperatureCut-OffSwitch Immersion HighTemperatureCut-OffSwitch

SECTION II – INSTALLATION

WARNING / CAUTION

DO NOT TURN ON THE BOILER WATER 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, damage to the heating coil may result.

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 most

frequent hot water use. If the heater is to be raised off the floor, the entire bottom of the

heater should be supported by a solid surface.

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.

INSTALL THE HEAT EXCHANGER COIL

1. Remove the access panel. (See diagram below).

2. Insert the heat exchanger and align the holes in the cover plate with the slotted holes in the

flange. (Note: align heat exchanger pipe connections with the opening in the access panel.)

3. WARNING: THE NYLON BUSHINGS MUST BE IN THE OPENINGS BEFORE THE

BOLTS ARE INSERTED. FAILURE TO DO THIS WILL VOID THE WARRANTY.

4. Insert and secure the bolts to the nuts one at a time in the following manner.

a. Place the nut behind the slotted flange opening.

b. Hold the nut in place with one hand – insert the bolt with the other.

c. Thread the bolt into the nut and tighten.

d. Proceed to the next opening.

e. NOTE: BE SURE TO PLACE BOLTS IN ALL OF THE OPENINGS.

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. All integral components have been properly sized to meet design conditions. Piping to the

unit should be sized to meet the design conditions, as dictated by good engineering practices.

2. Connect boiler water supply and return lines to heating coil assembly.

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

refer to the drawing for location and sizes.

4. 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 Probe

Temperature and Pressure Relief Valve

5. 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.

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