Lochinvar EFFICIENCY PLUS Manuel utilisateur

DESIGNER’S GUIDE EFFICIENCY+ ®BOILER

150,000 – 300,000 BTU/HR

Dear Specifier/Project Manager,

At Lochinvar, we have long recognized the importance of innovation to any

product or service. Those who enter into business must also accept the challenge

of meeting constantly changing needs.

The designer’s guide you are now holding has been designed to make it more

convenient for you to select the perfect Lochinvar boiler for your projects and

provide correct specifications for your teams.

All information has been organized and presented in a succinct, easy-to-use

manner, so you can use and share information confidently and with minimal

effort.

However, it is important to remember that this guide is not intended to replace our

installation manual. Installers should still refer to our installation manual for

specific installation instructions.

We hope our manual will make your work easier and more productive.

As always, we greatly appreciate your input on additional improvements

for the future.

Thanks once again for specifying the Lochinvar family of quality standard

and custom-built water heaters and boilers.

Sincerely,

Lochinvar Corporation

Lochinvar Corporation • 615-889-8900 / Fax: 615-547-1000

Lochinvar DESIGNER’S GUIDE EFFICIENCY+ BOILER 615-889-8900 1

Air Removal . . . . . . . . . . . . . . . . . . . . . .18

Boiler Operating Temperature Control . . . .19

Clearances . . . . . . . . . . . . . . . . . . . . . . . .3

Codes . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Combustion & Ventilation Air . . . . . . . . . . .3

Connection To Terminal Strip . . . . . . . . . .19

Contaminants . . . . . . . . . . . . . . . . . . . . . .5

Electrical Requirements (North America) . . 19

Gas Supply . . . . . . . . . . . . . . . . . . . . . .14

Location of Unit . . . . . . . . . . . . . . . . . . . . .2

Low Water Temperature Systems . . . . . . . .17

Outdoor Installation . . . . . . . . . . . . . . . . .13

Outdoor Use . . . . . . . . . . . . . . . . . . . . . . .3

Primary/Secondary Piping . . . . . . . . . . . .15

Relief Valve Piping . . . . . . . . . . . . . . . . . .16

Remote Temperature Control . . . . . . . . . . .19

Special Design Applications . . . . . . . . . . .18

Three-Way Valves . . . . . . . . . . . . . . . . . .16

Venting . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Venting Options . . . . . . . . . . . . . . . . . . . .7

Water Flow Requirements . . . . . . . . . . . .15

Water Velocity Control . . . . . . . . . . . . . . .15

Figures & Tables Index

FIG. 1 Boiler Equipment & Control

Orientation . . . . . . . . . . . . . . . .3

FIG. 2-5 Combustion & Ventilation Air . . .4

FIG. 6 Barometric Damper

Installation . . . . . . . . . . . . . . . . .8

FIG. 7 Multiple Unit Barometric

Damper Installation . . . . . . . . . .8

FIG. 8 E+ Vent With

Sidewall Air Inlet . . . . . . . . . . . .9

FIG. 9 E+ Vent With

Vertical Air Inlet . . . . . . . . . . . .10

FIG. 10 Horizontal Direct Vent . . . . . . .11

FIG. 11 Horizontal Direct Vent Cap . . . .11

FIG. 12 Multiple Sidewall Vent Caps . . .12

FIG. 13 Vertical Direct Vent . . . . . . . . . .12

FIG. 14 Outdoor Venting . . . . . . . . . . .13

FIG. 15 Primary/Secondary

System Piping . . . . . . . . . . . . .16

FIG. 16 Low Temperature Bypass

System Piping . . . . . . . . . . . . .17

FIG. 17 Heating/Chilled

Water System . . . . . . . . . . . . .18

TABLE A. Clearances From

Combustible Construction . . . . . .3

TABLE B. Conventional Venting,

Vent Flue Size . . . . . . . . . . . . . .7

TABLE C. E+ Vent Sidewall

Air Kit Part Numbers . . . . . . . . .9

TABLE D. E+ Vent Horizontal

Air Kit Part Numbers . . . . . . . .11

TABLE E. Vertical Direct Vent Flue &

Air Inlet Sizes . . . . . . . . . . . . .13

TABLE F. Outdoor Vent Kit . . . . . . . . . . .13

TABLE G. Gas Supply Pipe Sizing . . . . . .14

TABLE H. Inlet Gas Pressure . . . . . . . . . .14

TABLE I. Minimum & Maximum

Boiler Flow Rates . . . . . . . . . . .15

TABLE J. Water Flow Requirements . . . . .15

TABLE K. Heat Exchanger Head-loss . . . .16

TABLE L. Amp Draw . . . . . . . . . . . . . . .19

Appendix A: Boiler Piping Diagrams

Primary/Secondary Boiler . . . . . . . . . . . .A1

Multiple Unit - Primary/Secondary . . . . . .A2

Low Temperature Bypass Piping . . . . . . . .A3

Table of Contents

CODES

The equipment shall be installed in

accordance with those installation

regulations in effect in the local area where

the installation is to be made. These must be

carefully followed in all cases. Authorities

having jurisdiction must be consulted before

installations are made. In the absence of such

requirements, the installation must conform to

the latest edition of the National Fuel Gas

Code, ANSI Z223.1. Where required by the

authority having jurisdiction, the installation

must conform to American Society of

Mechanical Engineers Safety Code for

Controls and Safety Devices for Automatically

Fired Boilers, No.(CSD-1). All boilers conform

to the latest edition of the ASME Boiler and

Pressure Vessel Code, Section IV. Where

required by the authority having jurisdiction,

the installation must comply with the

Canadian Gas Association Code,

CAN/CGA-B149.1 and/or B149.2

and/or local codes.

LOCATION OF UNIT

Locate the unit so that if water connections

should leak, water damage will not occur.

When such locations cannot be avoided,

it is recommended that a suitable drain

pan, adequately drained, be installed

under the unit. The pan must not restrict

combustion air flow.

Under no circumstances is the

manufacturer to be held responsible for

water damage in connection with this

unit or any of its components.

2Lochinvar DESIGNER’S GUIDE EFFICIENCY+ BOILER 615-889-8900

Lochinvar

Water Velocity

(See Page 15 for minimum and

maximum flow rates.)

Piping Requirements and

Specialties

(See Page 15 for piping

application requirements.)

System Water Temperature

(See Page 17 for piping and

design recommendations.)

System and Boiler Control

(See Page 19 for boiler

operating and temperature

control.)

Air Elimination and

Expansion Tank Placement

(See Page 18 for air removal

information.)

In designing

a hot water heating system,

pay special attention to:

The indoor unit must be installed so that

the ignition system components are

protected from water (dripping, spraying,

rain, etc.) during appliance operation and

service (circulator replacement, control

replacement, etc.)

Units located in a residential garage

must be installed so that all burners and

burner ignition devices have a minimum

clearance of 18” (46cm) above the floor.

The unit must be located or protected so

that it is not subject to physical damage

by a moving vehicle.

The appliance must be installed on a

level floor. A combustible wood floor may

be used without additional bases or

special floor buildup. Maintain required

clearances from combustible surfaces.

The appliance must not be installed on

carpet or other combustible material other

than wood flooring.

SPECIAL LOCATION:

OUTDOOR USE

Efficiency+ Models are approved for

outdoor installations. Outdoor models

have additional location and clearance

requirements. These requirements must be

adhered to carefully, since wind, rain, snow

and cold cannot be controlled in outdoor

applications. See Outdoor Installation,

in the venting section on page 13.

COMBUSTION AND VENTILATION

Provisions for combustion and ventilation

air must be in accordance with Section

5.3, Air for Combustion and Ventilation, of

the latest edition of the National Fuel Gas

Code, ANSI Z223.1, or in Canada, the

latest edition of CGA Standard B149

Lochinvar DESIGNER’S GUIDE EFFICIENCY+ BOILER 615-889-8900 3

(TABLE A)

CLEARANCES FROM COMBUSTIBLE CONSTRUCTION

RIGHT SIDE 1”

REAR 1”

LEFT SIDE 6” (24” suggested for service)

FRONT 3” (24” suggested for service)

Suitable for closet installation

TOP 3”

*Allow sufficient space for servicing pipe connections, pump

and other auxiliary equipment, as well as the appliance.

FLUE PRODUCTS

VENT

GAS

CONNECTION

SYSTEM

RETURN

BURNER

INSPECTION

PORT

SYSTEM

SUPPLY

BACK

AIR INLET

TERMINAL

STRIP

(INSIDE)

120V

ELECTRICAL

CONNECTION

DRAIN

LEFT SIDE

FRONT

EB150-300

(FIG. 1) BOILER EQUIPMENT &

CONTROL ORIENTATION

4Lochinvar DESIGNER’S GUIDE EFFICIENCY+ BOILER 615-889-8900

Installation Code for Gas Burning Appliances

and Equipment, or applicable provisions of

the local building codes.

The equipment room must be provided with

properly sized openings to assure adequate

combustion air and proper ventilation, when

the unit is installed with conventional venting

or sidewall venting.

If air is taken directly from outside

the building with no duct, provide

two permanent openings:

A. Combustion air opening with a

minimum free area of one square inch per

4000 Btu/hr input. This opening must be

located within 12”(30 cm) of the bottom of

the enclosure.

B. Ventilation air opening with a minimum

free area of one square inch per 4000

Btu/hr input. This opening must be

located within 12”(30 cm) of the top of

the enclosure.

If combustion and ventilation air is

taken from the outdoors using a

duct to deliver the air to the

mechanical room, each of the two

openings should be sized based on a

minimum free area of one square inch per

2000 Btu/hr.

If air is taken from another interior

space, each of the two openings

specified above should have a net free

area of one square inch for each 1000

Btu/hr of input, but not less than 100

square inches (645 cm2).

If a single combustion air opening is

provided to bring combustion air in

directly from the outdoors, the opening

must be sized based on a minimum free

area of one square inch per 3000 Btu/hr.

This opening must be located within 12”

(30 cm) of the top of the enclosure.

Lochinvar

(FIG. 4) COMBUSTION AIR FROM INTERIOR SPACE

(FIG. 3) COMBUSTION AIR THROUGH DUCTWORK

(FIG. 5) COMBUSTION AIR FROM

OUTSIDE SINGLE OPENING

(FIG. 2) COMBUSTION AIR DIRECT FROM OUTSIDE

EXAMPLE OF

SIZING FOR

COMBUSTION

& VENTILATION

AIR OPENINGS

(BOILER WITH

300,000 BTU/HR

INPUT):

When combustion and

ventilated air is taken from

directly outside the building

(FIG. 2), divide the total BTU’s

by 4,000. This yields 75 sq.in.

of “Free Area” without

restriction.

300,000 ÷ 4,000 =

75 sq.in.

Since the air opening is 50%

closed due to screens and

louvers, the total opening

MUST be multiplied by 2.

75 sq.in. x 2 =

150 sq.in.

This project requires one

Ventilation Air Opening with

net “Area” of 75 square

inches with louver dimensions of

12” x 15”= 168 sq.in.

and one Combustion Air

Opening with net “Area”

of 75 square inches with

louver dimensions of

12” x 15”= 168 sq in.

CAUTION: Under no circumstances should

the equipment room be under a negative

pressure when atmospheric combustion

equipment is installed in the room.

Lochinvar DESIGNER’S GUIDE EFFICIENCY+ BOILER 615-889-8900 5

CONTAMINANTS

Combustion air drawn from an interior or

exterior space must be free of any chemical

fumes which could be corrosive to the boiler.

Burning chemical fumes results in the

formation of corrosive acids which attack

the boiler and cause improper combustion

and premature failure of the boiler and vent.

These fumes are often present in areas where

refrigerants, salts, and solvents are used.

Therefore, be aware of swimming pool

equipment, water softening, and cooling

system placement.

VENTING

General

Vent installations for connection to gas vents

or chimneys must be in accordance with

Part 7, “Venting of Equipment”, of the latest

edition of the National Fuel Gas Code, ANSI

Z223.1, or applicable provisions of the local

building codes.

The connection from the appliance vent to the

stack must be as direct as possible and

sized correctly, using the proper vent table.

The horizontal breeching of a vent must

have at least 1/4”rise per linear foot.

The horizontal portions should also be

supported for the design and weight of the

material employed to maintain clearances,

prevent physical damage and separation of

joints.

The connection from the appliance vent to the

stack or vent termination outside the building

must be made with listed Type “B” double

wall vent (or equivalent) for conventional vent

applications.

When utilizing direct vent capabilities

connections must be made with AL29-4C

stainless steel (or equivalent) vent material.

Material should be sized according

to vent sizing tables (FAN column) in

the latest edition of the National Fuel

Gas Code.

The vent materials and accessories, such as

firestop spacers, thimbles, caps, etc., must

be installed in accordance with the

manufacturer’s listing.

The vent connector and firestop shall provide

correct spacing to combustible surfaces and

seal to the vent connector on the upper and

lower sides of each floor or ceiling through

which the vent connector passes.

Any improper operation of the common

venting system in the existing building must

be corrected when new equipment is

installed, so the installation conforms to the

latest edition of the National Fuel Gas Code,

ANSI Z223.1.

CAUTION!

EXHAUST FANS:

Any fan or equipment

which exhausts air from

the equipment room may

deplete the combustion

air supply and/or cause

a down draft in the

venting system. If a fan

is used to supply

combustion air to

the equipment room, it

must be sized to make

sure that it does not

cause drafts which could

lead to nuisance

operational problems

with the boiler.

6Lochinvar DESIGNER’S GUIDE EFFICIENCY+ BOILER 615-889-8900

The efficiency of this appliance allows its

products of combustion to be vented through

a smaller vent pipe when compared to units

of the same Btu/hr capacity. For this reason,

resizing common venting systems is

recommended for proper operation.

When resizing any portion of the common

venting system, it should be resized to

approach the minimum size as determined

using the appropriate tables (FAN column) in

the National Fuel Gas Code.

Failure to resize a common venting system

could lead to the formation of condensate

and premature deterioration of the vent

material.

Flue gas condensate can freeze on exterior

walls or on the vent cap. Frozen condensate

on the vent cap can result in a blocked flue

condition. Some discoloration to exterior

building surfaces can be expected. Adjacent

brick or masonry surfaces should be

protected with a rust resistant sheet metal

plate.

Vent connectors serving appliances vented by

natural draft must not be connected to

any portion of a mechanical draft system

operating under positive pressure.

Connection to a positive pressure stack may

cause flue products to be discharged into the

living space causing serious health injury.

Locate units as close as possible to a chimney

or gas vent.

Vent Terminations

When locating the vent cap, consider the effects

of snow, leaf dropping, etc., to ensure that no

blockage occurs.

The distance of the vent terminal from adjacent

public walkways, adjacent buildings, windows

that open and building openings must comply

with the latest edition of the National Fuel Gas

Code, ANSI Z223.1.

The vent terminal must be vertical and

exhaust outside the building at least 2 feet

(0.6m) above the highest point of the roof

within a 10 foot (3.0m) radius of the

termination.

The vertical termination must be a minimum

of 3 feet (0.9m) above the point of exit in the

rooftop.

A vertical termination less than 10 feet (3.0m)

from a parapet wall shall be a minimum of 2

feet (0.6m) higher than the parapet wall.

The vent cap shall terminate at least 3 feet

(0.9m) above any forced air inlet within 10

feet (3.05m). The vent shall terminate at least

4 feet (1.2m) below, 4 feet (1.2m)

horizontally from or 1 foot (0.30m) above

any door, window, or gravity air inlet to the

building.

Do not terminate the vent in a

window well, stairwell, alcove,

courtyard, or other recessed area.

The vent cannot terminate below

grade.

Lochinvar

IMPORTANT!

The vent cap should

have a minimum

clearance of 4 feet

horizontally from electric

meters, gas meters,

regulators, air inlets and

air relief equipment.

Additionally, the vent

cap should never be

located above or below

these items, unless a 4

foot horizontal distance

is maintained.

NOTE:

The weight of the

venting system MUST

NOT rest on the boiler.

It should be properly

supported.

WARNING

Vent connectors serving

gas appliances, which

operate under a

negative vent pressure,

shall not be connected

into any portion of

mechanical draft

systems operating under

positive vent pressure.

Masonry Chimney

A masonry chimney must be properly sized

for the installation of a high efficiency gas fired

appliance. Venting of a high efficiency

appliance into a cold or oversized masonry

chimney can result in operational and safety

problems.

Exterior masonry chimneys, with one or more

sides exposed to cold outdoor temperatures, are

more likely to have venting problems. For this

reason, exterior masonry chimneys are not

generally recommended to vent high efficiency

gas appliances.

An interior masonry chimney, which is not

exposed to the outdoors below the roofline, may

be used to vent high efficiency gas appliances

based on the results of careful inspection,

proper sizing and local code approval. If there

is any doubt about the sizing or condition of a

masonry chimney, it should be relined with a

properly sized and approved chimney liner

system.

An interior masonry chimney should be carefully

inspected to determine its suitability for the

venting of flue products.

A clay tile lined chimney must be structurally

sound, straight and free of misaligned tile, gaps

between liner sections, missing sections of liner

or any signs of condensate drainage at the

breeching or clean out.

If there is any doubt about the condition of a

masonry chimney, it should be relined.

Metallic liner systems (Type “B” double-wall,

flexible, or rigid metallic liners) are

recommended to line or reline an existing

masonry chimney. Consult with local code

officials to determine code requirements or the

advisability of using a lined masonry chimney

or relining of a masonry chimney.

VENTING OPTIONS

Conventional Venting - Negative Draft

Size vent material according to the “FAN”

column of vent sizing tables in the latest edition

of the National Fuel Gas Code. “FAN” applies

to Category I fan assisted combustion

appliances with natural draft. Utilize Category

I type “B” vent material for all conventional

venting applications.

A bell increaser is provided and installed

directly on the boiler vent outlet. The bell

increases the boiler vent size by 1 inch

(25.4mm) in diameter. The vent connection

is made directly to the bell increaser on the

top of the unit. No additional draft diverter

or barometric damper is required.

(TABLE B)

CONVENTIONAL VENTING, VENT CONNECTION SIZE

CONVENTIONAL

MODEL VENT FLUE SIZE

EB150 5”

EB200 5”

EB250 6”

EB300 6”

Lochinvar DESIGNER’S GUIDE EFFICIENCY+ BOILER 615-889-8900 7

8Lochinvar DESIGNER’S GUIDE EFFICIENCY+ BOILER 615-889-8900

When each unit is installed with an individual

vent, and the negative draft is higher than the

specified range (0.02 to 0.05 inches of water

column), a barometric damper will be necessary.

Multiple unit installations with combined

venting require barometric dampers to

regulate draft at each unit. The negative

draft must be within the range of 0.02 to

0.05 inches of water column to ensure

proper operation.

All draft readings are made while the unit is

in stable operation (approximately 2 to 5

minutes).

For this type of installation, it is best to use a

draft control for each boiler located on the

riser between the vent outlet and the

breeching - Location “A”. (Figure 7)

When this riser is too short to permit the

installation of a control, locate a separate

control for each boiler on the main breeching

as illustrated in Location “B”. (Figure 7)

If, because of general crowding or other

reasons, neither of these locations are

possible, use a single large control in the

breeching between the boiler nearest the

chimney and the chimney, as shown in

Location “C”. (Figure 7)

Conventional Venting with Direct

Combustion Air Intake (E+Vent)

This vent system uses two pipes, one vertical

pipe with a roof top termination for the flue

products and one pipe for combustion air. The

combustion air pipe may terminate

horizontally with a sidewall air inlet or

vertically with a roof top air inlet. All

instructions for “Conventional Venting -

Negative Draft” apply to “Conventional

Venting with Direct Combustion Air”. The flue

may be combined with the vent from any

other negative draft, Category I appliances.

Utilize Category I type “B” vent material for

venting flue products.

Lochinvar

WATER HEATER/BOILER

BAROMETRIC DAMPER ON SINGLE UNIT INSTALLATION

Lined

Chimney

WATER HEATER/BOILER

BAROMETRIC DAMPER ON SINGLE UNIT INSTALLATION

(FIG. 6) BAROMETRIC DAMPER INSTALLATION

(FIG. 7) MULTIPLE UNIT BAROMETRIC

DAMPER INSTALLATION

NOTE:

An unlined masonry

chimney should not be

used to vent flue

products from this high

efficiency appliance.

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