Lochinvar SYNC Manuel utilisateur

HIGH EFFICIENCY COMMERCIAL BOILERS

www.Lochinvar.com

DESIGNER’S GUIDE SYNC COMMERCIAL BOILER

Up to 98%

Thermal Efficiency

Designer’s Guide / SYNC Boiler

Table of Contents

Combustion & Ventilation Air …………………… Page 2

Venting ….…………………………………………….. Page 5

Gas ….….…………….……………….………………… Page 13

Water …..……………………..……………………….. Page 15

Electricity & Controls ……………………………….. Page 21

Other Details ..……………………………………….. Page 26

Appendix A ….……..…………………………………. Page 29

Appendix B …………………………………………… Page 34

Designer’s Guide / SYNC Boiler

At Lochinvar, we know that designing a boiler is hard work. Designing a boiler system is

no picnic either. Demands for greater efficiency and elaborate system control have

made systems more complex.

This designers guide will break down the system requirements that match the SYNC

boiler to assure safe operation, highly efficient heating and long life.

There are five major elements of boiler system design:

Combustion &

Ventilation Air

(See page 2)

Venting

(See page 5)

Gas

(See page 13)

Water

(See page 15)

Electricity &

Controls

(See page 21)

Plus many other important details:

Locations Suggested Piping Diagrams

(See page 27 for “Location of Unit”) (See Appendix “A”)

High Altitude Requirements Component List

(See page 28 for “High Altitude Applications”) (See Appendix “B”)

Gas

Water

Electricity&

Controls

Combustion

&

Ventilation

Air

Venting

Designer’s Guide / SYNC Boiler

Chapter 1 – Combustion and

Ventilation Air

The first, important design consideration is air. Everybody’s gotta breathe. Even boilers need air.

Air seems easy enough. You stand in the equipment room and you breathe comfortably, don’t

you? Open a door. Open a window. This is a big room. There’s lots of air in here for the boiler,

right?

The average person inhales 400 to 500 cubic feet of air in a 24 hour period. A one million Btu/hr

boiler will draw 226.38 cubic feet of air every MINUTE! A 20 by 20 by 8 foot equipment room

holds 3200 cubic feet of air. That’s a volume of air to last you or me over six days. A one million

Btu/hr SYNC will consume 3200 cubic feet of air in 14 minutes.

Therefore, a good, easy flow of clean air is 100% necessary for clean, efficient combustion. So,

we need to provide a permanent and uninterrupted flow of air to the boiler. The SYNC boiler is

designed to receive combustion air by one of TWO methods. The boiler may draw combustion

air from the room or have the air ducted directly to the boiler from an exterior space.

This chapter explains the methods for “air from the room”. Chapter 2 explains “air ducted directly

to the boiler”. Again, this chapter lists several techniques to size the air openings that will deliver

room air. If there are other appliances in the room requiring air, their air requirements must be

including when sizing the air openings.

Provisions for combustion and ventilation air must be

designed and installed in accordance with “Air for

Combustion and Ventilation”, of the latest edition of the

National Fuel Gas Code, ANSI Z223.1, (in Canada, the

latest edition of CGA Standard B149 Installation Code for

Gas Burning Appliances and Equipment) or applicable

provisions of the local building codes.

NEGATIVE PRESSURE IN THE EQUIPMENT ROOM

It is important to NEVER have a negative pressure on the equipment room. Exhaust fans are

popular in equipment rooms to exchange the air. If the exhaust fan pulls air OUT, then a negative

pressure occurs in the room. The combustion and ventilation air must be sized to supply all the

equipment PLUS the air for the exhaust fan.

COMBUSTION AND VENTILATION AIR SIZING CALCULATIONS

The sizing calculations in this section are based on “Free Area”. The

louvers or grill used on the air openings must have a net free area equal

to or greater than the value derived in the calculations. The Free Area in

a louver or grill is defined as the open, unblocked area. The louvers,

grills, mesh, blades, all will block a given amount of space in the louver’s

overall dimension. Consult the louver manufacturer for exact net free

area of the louver.

Designer’s Guide / SYNC Boiler

1. COMBUSTION AIR FROM OUTSIDE

If air is taken directly from outside the building with no

duct, provide two permanent openings to the

equipment room:

(a) Combustion air opening, with a minimum free area

of one square inch per 4000 Btu/hr input (5.5 cm²

per

kW). 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 (5.5 cm²

per

kW). This opening must be located within 12" (30 cm)

of the top of the enclosure.

2. COMBUSTION AIR THROUGH DUCTS

If combustion and ventilation air is taken from the outdoors using

a duct to deliver the air to the equipment room, each of the two

openings should be sized based on a minimum free area of one

square inch per 2000 Btu/hr (11 cm²

per kW) of input.

3. COMBUSTION AIR FROM INTERIOR

SPACE

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 (22 cm²

per kW) of

input, but not less than 100 square inches

(645 cm²).

THE SYNC COMES WITH LOUVER CONTACTS AS STANDARD EQUIPMENT. THE CONTACTS WILL

OPEN AND CLOSE A MOTORIZED LOUVER ON EACH CALL FOR HEAT.

Did you Know?

Designer’s Guide / SYNC Boiler

4. DIRECT OUTSIDE AIR, SINGLE OPENING

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 (7 cm²

per kW). This opening

must be located within 12" (30 cm) of the top of the

enclosure.

The combustion air must be free of any contaminants or chemical fumes. Salts, refrigerants and

solvents introduced into the combustion process will result in the formation of corrosive acids that

will damage the appliance and the vent.

Designer’s Guide / SYNC Boiler

Chapter 2 – Venting

Venting is another important design element for the installation of a gas fired appliance. It has a

variety of choices, many different vent configurations to chose from, rules and regulations that

govern the installation and most important of all, it bears a requirement for human safety.

Lochinvar offers five different vent configurations on the SYNC boiler to meet the building’s

requirements. They are…

Vertical Vent with Air from the Equipment Room

Vertical Vent with Air from the Rooftop

Vertical Vent with Air from the Sidewall

Sidewall Vent with Air from the Equipment Room

Sidewall Vent with Air from the Sidewall

Part 1

Vent Categories

Lochinvar offers five venting options with the SYNC that must be installed with approved

Category IV vent material. Below is the vent category diagram, standard throughout the industry.

The four basic Vent Categories are determined by two characterisitics, Condensation and

Pressure.

In all vent configurations, the SYNC boiler will operate in Category IV. The modulation of the

burner down to 10% of the boiler’s input will put low temperature flue products in the stack that

will condense. The boiler’s blowers are designed to push the flue products through the exhaust

system with a consistent positive pressure.

Always use Category IV approved non-corrosive vent material and always seal the joints and

connections 100% gas tight in order to prevent condensation and flue gas leakage.

CATEGORY I

Non‐Condensing

Non‐PositivePressure

CATEGORY III

Non‐Condensing

PositivePressure

CATEGORY II

Condensing

Non‐PositivePressure

CATEGORY IV

Condensing

PositivePressure

SPILLAGE OF FLUE PRODUCTS AND CARBON MONOXIDE EMISSIONS PRODUCED BY THE

COMBUSTION PROCESS CAN CAUSE SEVERE PERSONAL INJURY OR DEATH.

Warning

Venting

Designer’s Guide / SYNC Boiler

VERTICAL VENT WITH COMBUSTION AIR FROM EQUIPMENT ROOM.

The flue outlet terminates on the rooftop. The combustion air is drawn

from the equipment room.

BULLET POINTS

Category IV vent material is required, such as AL29-4C or PVC/CPVC.

All vent joints and seams must be sealed gastight and may not be common vented.

All vent material for this configuration including vent termination will be obtained locally.

The air is delivered to the equipment room by means defined in Chapter 1 of this

designer’s guide.

When venting with PVC, the first ten feet of pipe must be CPVC for heat protection. See

page 12 of the installation manual for details.

 VENTVENTVENT

MODELDIAMETERMIN.LENGTHMAX.LENGTH

SBN10006"12ft100ft

SBN13006"12ft100ft

SBN15006"12ft100ft

A 90° VENT ELBOW IS EQUAL TO 5 LINIER FEET OF VENT PIPE AND ALL VENT ELBOWS MUST BE

ACCOUNTED FOR IN THE TOTAL VENT LENGTH. SEE SYNC I & O MANUAL FOR DETAILS.

Did you Know?

Designer’s Guide / SYNC Boiler

SIDEWALL VENT WITH COMBUSTION AIR FROM EQUIPMENT ROOM.

The flue outlet terminates out the sidewall. The combustion air is drawn

from the equipment room.

BULLET POINTS

Category IV vent material is required, such as AL29-4C or PVC/CPVC.

All vent joints and seams must be sealed gastight and may not be common vented.

All vent material for this configuration including vent termination will be obtained locally.

The sidewall termination plate may be used with PVC or CPVC vent material.

The air is delivered to the equipment room by means defined in Chapter 1 of this

designer’s guide.

When venting with PVC, the first ten feet of pipe must be CPVC for heat protection. See

page 12 of the installation manual for details.

 VENTVENTVENT

MODELDIAMETERMIN.LENGTHMAX.LENGTH

SBN10006"12ft100ft

SBN13006"12ft100ft

SBN15006"12ft100ft

Designer’s Guide / SYNC Boiler

VERTICAL VENT WITH COMBUSTION AIR FROM THE ROOFTOP.

The flue outlet terminates on the rooftop. The combustion air is ducted to

the appliance from outdoors through the rooftop. This is true Direct Vent

with the flue termination and the air inlet port in the same pressure zone.

BULLET POINTS

Category IV vent material is required, such as AL29-4C or PVC/CPVC.

All vent joints and seams must be sealed gastight and may not be common vented.

All other vent material for this configuration including vent termination will be obtained

locally.

The air is delivered to the appliance via a separate duct. The air intake material can be

galvanized pipe, PVC, CPVC or ABS and must be sealed gas tight.

When venting with PVC, the first ten feet of pipe must be CPVC for heat protection. See

page 12 of the installation manual for details.

 AIRINTAKEAIRINTAKEAIRINTAKEVENTVENTVENT

MODELDIAMETERMIN.LENGTHMAX.LENGTHDIAMETERMIN.LENGTHMAX.LENGTH

SBN10006"12ft100ft6"12ft100ft

SBN13006"12ft50ft6"12ft50ft

SBN13007"12ft100ft7"12ft100ft

SBN15006"12ft50ft6"12ft50ft

SBN15007"12ft100ft7"12ft100ft

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