Laars EBP0110, EBP0175, EDP0110, EDP0175, EDN0110 Installation, Operation And Maintanance Manual

...

Installation, Operation and Maintenance Instructions Document 1187B

Installation, Operation and Maintenance Instructions for

Endurance

EBP Series Modulating Combination Boiler

(natural or propane gas)

EDP Series Modulating Hydronic Boiler

(natural or propane gas)

EDN Series Modulating Boiler, non ferrous

(natural or propane gas)

WARNING

FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,

qualified in hot water boiler installation and maintenance. Improper installation and/or operation could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death. Improper installation and/or operation will void the warranty. As an additional measure of safety, Laars strongly recommends installation of suitable carbon monoxide detectors in the vicinity of this appliance and in any adjacent occupied spaces.

If the information in this manual is not

WARNING

followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a nearby phone. Follow the gas supplier's instructions.

• If you cannot reach your gas supplier, call the fire department.

Installation and service must be performed by a qualified installer, service agency, or gas supplier.

Assurez-vous de bien suivres les instructions données dans cette notice pour réduire au minimum le risque d’incendie ou d’explosion ou pour éviter tout dommage matériel, toute blessure ou la mort.

Ne pas entreposer ni utiliser d’essence ni d’autres vapeurs ou liquides inflammables dans le voisinage de cet appareil ou de tout autre appareil.

QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:

• Ne pas tenter d’allumer d’appareils.

• Ne touchez à aucun interrupteur. Ne pas vous servir des téléphones dansle bâtiment où vous vous trouvez.

• Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur.

• Si vous ne pouvez rejoindre le fournisseur de gaz, appelez le sservice des incendies.

L’installation et l’entretien doivent être assurés par un installateur ou un service d’entretien qualifié ou par le fournisseur de gaz.

AVERTISSEMENT

H2313500B

A subsidiary of BRADFORD WHITE Corporation

Page 2

TABLE OF CONTENTS

SECTION 1. General Information

1.1 Introduction................................................... 3

1.2 Codes and Standards................................... 3

1.3 Unpacking the Appliance.............................. 4

1.4 Locating the Appliance ................................. 4

1.5 Clearances ................................................... 4

SECTION 2. Venting Options

2.1 Concentric Direct Vent ................................. 5

2.1.1 Concentric Vent Description ......................... 5

2.1.2 Laars Concentric Vent Kits ........................... 5

2.1.3 Horizontal Concentric Vent Location ............ 5

2.2 Stainless Steel Single Pipe Horizontal

and Vertical Vents — Category IV ................ 9

2.3 Air Source For Combustion (when not

ducted to the Endurance) ........................... 11

2.3.1 Air From Inside the Building ....................... 11

2.3.2 All Air From Outdoors .................................11

2.3.3 Connecting Special Gas Vent to the

Appliance.................................................... 12

2.4 Non-Concentric Combustion Air ................. 12

SECTION 3. Gas Piping

3.1 Gas Piping .................................................. 12

3.2 Domestic Water Piping (EBP only) ............. 13

3.3 Anti-Freeze — Domestic Water .................. 14

SECTION 4. Hydronic Heat Piping

4.1 Hydronic Piping .......................................... 14

4.2 Using in a Combined Hot Water Heating

and Chilled Water Cooling System ............. 17

4.3 Water Quality and Treatment ..................... 17

4.4 Anti-Freeze ................................................. 17

4.4.1 Endurance Boiler Low

Temperature Feature ................................. 17

4.4.2 Anti-Freeze Boiler Additives ....................... 17

SECTION 5. Electrical Connections

5.1 Electrical Connections ................................ 20

SECTION 6. Using the Boiler Control

6.1 Front Panel Display .................................... 22

6.2 Control Logic .............................................. 22

6.3 View Menu.................................................. 22

6.4 Setpoint Menu ............................................ 24

6.4.1 “SP” Supply Temperature ........................... 24

6.4.2 “PO” Pump Operation ................................. 24

6.4.3 “Pd” Pump Delay ........................................ 24

6.4.4 “Oar” Outdoor Reset................................... 24

6.4.5 “Oal” Minimum Outdoor Reset Point .......... 25

6.4.6 “rc” Outdoor Reset Ratio ............................ 25

6.4.7 “oTo” Warm Outdoor Shutdown ................. 25

6.4.8 “unl” Temperature Units ............................. 25

LAARS Heating Systems

6.4.9 “Add” Control Address ................................ 25

6.4.10 “Dif” Burner On Differential ......................... 25

6.5 Calculated Control Values .......................... 25

6.5.1 ACV Release (EBP only) ............................ 25

6.5.2 Tank Charge Setting (EBP only) ................ 25

6.5.3 Burner On Point.......................................... 25

6.5.4 Modulation Point......................................... 25

6.6 Other Control Functions ............................. 25

6.6.1 Using Buttons on Control ........................... 25

6.6.2 Alarm Acknowledge.................................... 26

6.6.3 Power On/Off .............................................. 26

6.6.4 Low Fire Hold ............................................. 26

6.6.5 High Fire Hold ............................................ 26

6.6.6 Pump Operation ......................................... 26

6.6.7 Anti-Condense Valve Operation ................. 26

6.6.8 Field-Supplied Outdoor Reset Controls ...... 27

SECTION 7. Boiler Start Up

7.1 Removal of Boiler From Common Vent ...... 27

7.2 Filling the System ....................................... 28

7.3 Firing Burner............................................... 28

SECTION 8. Maintenance and Component Description

8.1 Unit Pump................................................... 29

8.2 Gas Valve ................................................... 29

8.3 Safety Limit Switch ..................................... 29

8.4 Boiler Control.............................................. 29

8.5 Ignition Control ........................................... 30

8.6 Ignitor / Flame Sensor Assembly................ 30

8.7 Transformer ................................................ 30

8.8 PMW Board ................................................ 30

8.9 Blower ........................................................ 30

8.10 Transfer Tank (EBP) .................................. 30

8.11 Thermostatic Union (EDP/EDN) ................. 31

8.12 Cleaning the Boiler Coil .............................. 31

SECTION 9. Servicing

9.1 Sequence of Operation .............................. 31

9.2.1 Fault Code Identification ............................. 33

9.2.2 Fault Correction .......................................... 33

9.2.3 Resolving Lockouts (LO) ............................ 33

SECTION 10. Air Orifice and Gas Valve Adjustment

................................................................... 35

SECTION 11. Symptom Evaluations

11.1 Delayed Ignition.......................................... 35

11.2 Short Cycling .............................................. 36

11.3 Noisy Operation.......................................... 36

11.4 Insufficient Hot Water (EBP only) ............... 36

11.5 High Gas Consumption .............................. 37

SECTION 12. Parts Identification

................................................................... 38

Endurance

Page 3

SECTION 1. General Information

1.1 Introduction

EBP - This appliance is a low pressure, direct vent, hot water boiler that provides priority domestic hot water on demand as well as hydronic space heating. The unit has a twenty gallon tank which holds boiler water (as opposed to domestic water storage).

The boiler water is kept hot at all times to provide immediate response to call for heat or domestic water. Domestic water is heated by the boiler water through a stainless steel plate heat exchanger.

EDP/EDN - This appliance is a low pressure, direct vent, cold start hot water boiler that provides heat for hydronic space heating. The model number structure is shown in Figure 3.

Both appliances incorporate a circulating pump and a bypass loop, and provide circulation for the heating system and adequate flow for its own needs. It may be necessary to install a system circulator to achieve the required flow rate through the system.

Both appliances feature a forced draft, premixed combustion system. All air for combustion is supplied

with the gas to the burner (flame holder). Both the intake air and the gas are metered through separate orifices before entering the combustion air blower. The blower forces the air/fuel mixture through the flame holder and into the combustion chamber. The mixture is ignited from the hot surface ignitor and burns. Hot gases are forced out between the passes of the heat exchanger into the flue collector. Flue gases are discharged into the outside atmosphere through the vent terminal.

The appliance can operate with a concentric vent system that will provide outside air for combustion. Other venting arrangements can be provided for the appliance to include an alternative 50 equivalent feet maximum horizontal or condensate trapped vertical vent.

1.2 Codes and Standards

The Endurance may be a direct vent or Category IV Boiler. All installations must be made in accordance with:

a. The National Fuel Gas Code, ANSI Z223.1/

NFPA 54 latest edition, or b. CSA B149.1 Natural Gas and Propane

Installation Code. c. The requirements of the local utility or other

authorities having jurisdiction take precedence

over the general instructions contained herein. All electrical wiring is to be done in accordance with:. a. The National Electrical Code (NFPA 70), latest

edition or

Figure 1. Combo Heating/Domestic Water (Model EBP).

Figure 2. Heating Unit (Model EDP/EDN).

Page 4

1234567891011121314

E IF2 X

LAARS Heating Systems

Prod. Line

E = Endurance

Usage

B = Combination,

Heating & Domestic Water

D =Heating Only

Type

P =Standard N =Non Ferrous

(ED Units Only)

Figure 3. Model Structure.

BTU Input

0 1 1 0 0 1 7 5

b. The Canadian Electrical Code (CSA C22.1),

latest edition.

c. All applicable local installation codes must also

be adhered to.

All vent installations must be made in accordance with: a. The applicable venting requirements of the

National Fuel Gas Code (ANSI Z223.1/NFPA

54), latest edition; or

b. in Canada, The Natural Gas and Propane

Installation Code (CSA B149.1), latest edition. All applicable provisions of local building codes

should also be adhered to.

Fuel

N =Natural Gas P =Propane

A = 0' - 5,000' H =Over 5,000'

Altitude

Location

I = Indoor

Firing Mode

F = Modulating

Revision

2 = Second

Revision

Country of Sale

A = USA & Canada R =Russia

1.5 Clearances

The dimension and criteria in Table 1 should be

followed when choosing the location for the unit.

Minimum Clearances From Combustible Materials

Back 1 inch 25mm Left Side 1 inch 25mm Right Side 1 inch 25mm Front 1 inch 25mm Top (Alcove Install) 1 inch 25mm Top (Closet Install)* 22 inches 559mm Vent: Concentric, Direct 0 inch 0mm Vent: Category 3 inches 76mm

Options Code

X =None

1.3 Unpacking the Appliance

Remove all packing and tie down materials. Make immediate claims (to the carrier) if the appliance and its packaging are damaged.

1.4 Locating the Appliance

The appliance is designed for installation on combustible flooring, in alcoves, basements, closets, or utility rooms. It must NOT be installed on carpeting. IF INSTALLED IN A FINISHED AREA, PROVISION SHOULD BE MADE FOR DRAINAGE OF ANY ACCIDENTAL SPILLAGE OR LEAKAGE.

The location for the unit should be chosen with regard to venting dimensions, convenient access to piping, and accessibility for service and cleaning.

The boiler shall be installed so that the gas ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation or service (circulator replacement, control replacement, etc.).

Suggested Serviceability Clearances

Front 18 inches 457mm Left Side 6 inches 152mm Right Side 6 inches 152mm

*Minimum closet height 6'9" 206 cm

Table 1. Clearances.

SECTION 2. Venting Options

The Endurance boilers are certified as direct vent, sealed combustion boilers, when vented using one of the following two methods:

1) Concentric direct vent, which has a flue gas pipe

inside a combustion air pipe.

2) Non-concentric direct vent, using separate pipes

for the flue gases and the combustion air.

The Endurance boilers can also take air from the space (when properly sized), and be vented as a Category IV appliance.

Endurance

Page 5

The following sections describe the requirements

for each of these methods.

IMPORTANT NOTE REGARDING ENDURANCE VENTING: Regardless of the venting arrangement being used, the flue gas vent material used with the Endurance MUST be stainless steel special gas vent listed to U.L. Standard 1738 and U.L.C. Standard 636. Endurance flue gases must never be vented into a masonry chimney or vented with B-vent or other galvanized vent material. Endurance units are not permitted to be common vented with any other appliance(s), including other Endurance appliances.

2.1 Concentric Direct Vent

2.1.1 Concentric Vent Description

Endurance concentric direct vent is a sealedcombustion system. It can be used for vent systems with a maximum of 15 linear feet (4.6m) and three elbows. All of the air is drawn in from the outside through a 5" stainless steel outer pipe. Flue gases are vented through a 3" stainless steel pipe that is positioned inside the 5" intake pipe. Hot flue gases are surrounded by the intake flow of cooler outdoor air (see Figure 4). Laars offers two concentric vent kits, described in section 2.1.2. Laars concentric vents may be installed through, and be in contact with, combustible materials.

Figure 4. Combustion Air and Flue Gas Paths.

2.1.2 Laars Concentric Vent Kits

The Endurance is certified with a maximum of 15 linear feet (4.6m) of concentric piping and three sets of elbows. There are two concentric vent kits offered by Laars. Both kits, and all Laars Endurance vent material meet the requirements of U.L. Standard 1738 and U.L.C. Standard 636. The horizontal vent kit

is part number 2400-009. The vertical vent kit is part number 2400-011. See Figures 5 and 6, which show the components included with the kits and venting configurations. Installation instructions are included with the kits. Rules for concentric venting, vent material and vent terminal placement are discussed in the rest of section 2 of this manual.

For additional length, and/or fittings, to extend the kits to maximum 15 linear feet (4.6m) and three elbows, individual components are available. These components are shown in Figure 7.

2.1.3 Horizontal Concentric Vent Location

The centerline of the vent opening must be at least 16-1/2" (42cm) above grade, outside. Should it be impossible to locate the opening centerline 16-1/2" (42cm) above grade, use optional concentric vent terminal extension (part number 2400-428), shown in Figure 7.

In the U.S., vent terminals must be at least 3 feet (0.9m) above any forced air inlet located within 10 feet (3.0m). In Canada, vent terminals must be at least 6 feet (1.8m) from any forced air inlet.

In the U.S., a direct vent terminal must be at least 12" (30cm) from any window or door that may be opened, or any other nonmechanical opening. For an Endurance that is not direct vented (vented as Category IV), the vent terminal must be at least 4 feet (1.2m) below or to the side of, and 12" (30cm) above any such opening.

In Canada, a direct vent or non-direct vent terminal must be at least 36" (91cm) from any window or door that may be opened, or any other nonmechanical opening.

The vent opening should be well away from shrubbery or other obstructions that would prevent free air flow to and from the vent terminal.

If the vent terminal location chosen is less than 18" (46cm) below an overhang, the 3" vent pipe must extend to the outside edge of the overhang, to prevent the accumulation of flue gas (see Figure 9). Accumulating flue gas can contaminate the combustion air, causing nuisance lockouts of the ignition system. In addition, accumulation of flue gases can settle on, and damage the structure’s surfaces.

Vent terminals must not terminate in a location where condensate or vapor may be a nuisance, hazard, or could be a detriment to other equipment. See Figure 8 for more detail concerning vent terminal placement in the U.S. and Canada.

Do not locate the vent terminal where blockage by snow is a possibility, or where flue products could strike against building materials and cause degradation.

When multiple Endurance units are used, the concentric vent terminals may be side-by-side,

Page 6

LAARS Heating Systems

Configuration 1: Maximum horizontal = 28" Maximum vertical = 26" (Measurements are from the centerlineof the venting to the boiler top or face of outside wall.) Dimensions shown in inches.

Figure 5. Horizontal Vent Kit 2400-009.

Configuration 2: Maximum horizontal = 38" Maximum vertical = 16" (Measurements are from the centerline of the venting to the boiler top or face of outside wall.) Dimensions shown in inches.

Figure 6. Vertical Vent Kit 2400-011.

Endurance

Page 7

Figure 7. Concentric Vent Parts.

Dimensions shown in inches.

Page 8

LAARS Heating Systems

U.S. Installations (see note 1) Canadian Installations (see note 2)

A= Clearance above grade, veranda, porch, 12 inches (30 cm) 12 inches (30 cm)

deck, or balcony

B= Clearance to window or door that may Direct Vent Only: 12 inches (30 cm)

be opened Other Than Direct Vent: 4 feet (1.2 m) below or 36 inches (91 cm)

C= Clearance to permanently closed window See note 4 See note 5 D= Vertical clearance to ventilated soffit located

above the terminal within a horizontal See note 4 See note 5 distance of 2 feet (61cm) from the center line of the terminal

E= Clearance to unventilated soffit See note 4 See note 5 F= Clearance to outside corner See note 4 See note 5 G= Clearance to inside corner See note 4 See note 5 H= Clearance to each side of center line See note 4 3 feet (91 cm) within a height 15 feet

extended above meter/regulator assembly above the meter/regulator assembly

I= Clearance to service regulator vent outlet See note 4 3 feet (91 cm) J= Clearance to nonmechanical air supply Direct Vent Only: 12 inches (30 cm)

inlet to building or the combustion air inlet Other Than Direct Vent: 4 feet (1.2 m) below or 36 inches (91 cm) to any other appliance to side of opening; 1 foot (30 cm) above opening

K= Clearance to a mechanical air supply inlet 3 feet (91 cm) above if within 10 feet (3 m) 6 feet (1.83 m)

L= Clearance above paved sidewalk or paved Vent termination not allowed in this location Vent termination not allowed in this

driveway located on public property location

M= Clearance under veranda, porch, deck, See note 4 12 inches (30 cm) (see note 3)

or balcony

Notes:

1. In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.

2. In accordance with the current CAN/CGA-B149 Installation Codes.

3. Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

4. For clearances not specified in ANSI Z223.1 / NFPA 54, clearance is in accordance with local installation codes and the requirements of the gas supplier.

5. For clearances not specified in CAN/CGA-B149, clearance is in accordance with local installation codes and the requirements of the gas supplier.

to side of opening; 1 foot (30 cm) above opening

horizontally

Figure 8. Vent Terminal Clearance.

Endurance

Figure 9. Clearance from Overhang.

Figure 10. Multiple Concentric Vent Clearances.

Page 9

Figure 12. Vertical Vent Terminal Placement.

The vertical vent terminal must be placed such that the bottom of the vent cap is at least 2-feet (0.6m) above any structure (such as the peak of a roof or adjacent wall) within 10 feet (3.0m), and must be at least 3 feet (0.9m) above where the vent pipe exits the roof (see Figure 12).

When vertical vent systems have horizontal components, they must have a condensate drip tee in the offset. All horizontal portions of the vent system must slope a minimum 1/4" per foot toward the condensate drip tee. Laars vertical vent kit and individual venting components have condensate tees that work in a vertical vent system, and therefore it is not necessary to have an offset in a vertical vent system that uses these parts.

Figure 11. Vent System Pitch.

provided that they are at least 18" (46cm) apart, centerline to centerline (see Figure 10).

A horizontal vent system must pitch downward, toward the terminal and away from the Endurance, as shown in Figure 11. It must pitch at least 1/4" per foot (21mm per meter). Be sure to take this into consideration when choosing the vent terminal location.

2.2 Stainless Steel Single Pipe Horizontal and Vertical Vents – Category IV

Stainless steel special gas vent listed to U.L.

Standard 1738 and U.L.C. Standard 636 must be used to vent all models. Three-inch or 4-inch material can be used. Vent pipe and fittings are manufactured to these standards by HeatFab, Inc. under the trade name of Saf-T Vent

Vent

, and by ProTech Systems, Inc. under the trade name FasNSeal manufacturer’s instructions regarding design, location and assembly of the vent system.

The appliance may be vented with any number of elbows or fittings, providing that the maximum equivalent feet of venting is not exceeded. Equivalent feet of vent material is shown in table 2, along with information about vent temperature and pressure. Elbows (90°) in the vent system shall be considered to be 5 equivalent feet (1.5m).

A horizontal vent system must pitch downward, toward the terminal and away from the Endurance, as shown in Figure 11. It must pitch at least 1/4" per foot

, by Z-Flex™ under the trade name of Z-

. Follow the special gas vent

Page 10

LAARS Heating Systems

Figure 13. 3" Vent Parts.

Dimensions shown in inches.

Endurance

Page 11

Minimum clearance from combustibles (vent) U.S.* 3" 8cm

Minimum clearance from combustibles (vent) Canada 6" 15cm

Max. flue gas temp. 325°F 163°C Max vent pressure 1.5" w.c. 0.4kPa Max. equivalent ft. of 3" venting (any 50 15 combination of horizontal or vertical) equiv. feet equiv. meters Max. equivalent ft. of 4" venting (any 100 30 combination of horizontal or vertical) equiv. feet equiv. meters *Note: To use 3" (8cm) clearance, the vent must be open on at least one side. If fully enclosed, clearance is 6" (15cm)

Table 2. Category IV Vent Parameters.

(21mm per meter). Be sure to take this into consideration when choosing the vent terminal location.

For applications requiring vertical venting through a roof, the same limitations for length and fittings apply (see Table 2). Vertical vents greater than 7 feet (2.1m) in length must use a condensate trap.

Laars offers 3" vent parts for non-concentric venting, including an in-line condensate tee and vent caps for vertical venting. See Figure 13 for 3" vent parts, and Figure 15 for an example of the inline condensate in a vertical vent system.

IMPORTANT NOTE REGARDING ENDURANCE VENTING: Regardless of the venting arrangement

being used, the flue gas vent material used with the Endurance MUST be stainless steel special gas vent listed to U.L. Standard 1738 and U.L.C. Standard 636. Endurance flue gases must never be vented into a masonry chimney or vented with B-vent or other galvanized vent material. Endurance units are not permitted to be common vented with any other appliance(s), including other Endurance appliances.

2.3 Air Source For Combustion

(when not ducted to the Endurance)

When using Category IV venting methods the appliance draws all combustion air through its top and from the adjacent space. When locating the appliance

in unconfined spaces in buildings, infiltration may be adequate to provide air for combustion and ventilation. However, in buildings of unusually tight construction, or when locating the appliance in a confined space, additional air should be provided and the guidelines below must be followed:

2.3.1 Air From Inside the Building

The following method shall be used to size the air openings for boilers that are getting all of their combustion air from inside the building.

The confined space shall be provided with two permanent openings communicating directly with other spaces of sufficient volume so that the combined volume of all such spaces meets the criteria for an unconfined space. The total input of all gas utilization equipment installed in the combined spaces shall be used to determine the required minimum volume. Each opening shall have a minimum free area of not less than 1 in.

/1000 Btu/hr (220 mm2/kW) of the total input rating of all gas utilization equipment in the confined space, but not less than 100 in.

(645 cm2). One opening shall commence within 12 in. (30 cm) of the top, and one opening shall commence within 12 in. (30cm) of the bottom, of the enclosure. The minimum dimension of air openings shall be not less than 3 in. (8 cm).

2.3.2 All Air From Outdoors

When all air is provided from outdoors, but not ducted directly to the Endurance, the following methods shall be used to size the air opening(s).

a. Two permanent openings, one commencing

within 12 in. (30 cm) of the top and one

commencing within 12 in. (30 cm) of the bottom,

of the enclosure shall be provided. The openings

shall communicate directly, or by ducts, with the

outdoors or spaces (crawl or attic) that freely

communicate with the outdoors.

a1. Where directly communicating with the

outdoors or where communicating to the outdoors through vertical ducts, each opening shall have a minimum free area of

1 in.

/4000 Btu/hr (550 mm2/kW) of total input rating of all equipment in the enclosure.

a2. Where communicating with the outdoors

through horizontal ducts, each opening shall have a minimum free area of not less than 1 in.

/2000 Btu/hr (1100 mm2/kW) of total input rating of all equipment in the enclosure.

b. One permanent opening, commencing within 12

in. (30 cm) of the top of the enclosure, shall be permitted where the equipment has clearances of at least 1 in. (2.5 cm) from the sides and back and 6 in. (16 cm) from the front of the appliance.

Page 12

LAARS Heating Systems

The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and shall have a minimum free area of:

b1. 1 in.

/3000 Btu/hr (700 mm2/kW) of total input rating of all equipment in the enclosure, and

b2. Not less than the sum of the areas of all

vent connectors in the confined space.

2.3.3 Connecting Special Gas Vent to the Appliance

When drawing combustion air from the adjacent space, part number 2400-415 (room adapter with screen) can be used. One portion of this assembly connects to the 5" air collar (with a screen for the combustion air) and the other part connects to the 3" flue opening (see Figure 14). The rest of the 3" vent system can be connected to the adapter within the 2400-415.

2400-435 tee

(to separate venting from

combustion

air)

Combustion

Chamber

Fan

2400-416

concentric rain cap (use only on systems with condensate trap)

2400-435 tee

(to separate

venting from

combustion air)

3" diameter vent

(50 equivalent feet, maximum)

4" combustion air pipe

(15 equivalent feet, maximum)

Non-Concentric Direct Vent with Horizontal Vent.

2400-370

vertical vent cap

(can be used on system with

or without condensate trap)

2400-409 condensate trap

(used if vent height is

greater than 7 feet)

4" combustion air pipe

2400-426

3" vent termination

with screen

vent

gases

combustion

air

4" air terminal

(field-supplied)

combustion

air

Figure 14. Combustion Air from Room.

2.4 Non-Concentric Combustion Air

An alternate, non-concentric combustion air source may be installed (as shown in Figure 15), provided that the minimum 4" diameter combustion air duct does not exceed 15' (4.6m). Termination should include an air screen and be located in a qualified air space (see Section 2.3) or outside.

Separated combustion air / flue gas may be considered either “mechanical draft” or “direct vent”. To be considered “direct vent”, all of the combustion air and flue gas piping must be sealed stainless steel special gas vent, listed to U.L. 1738 and U.L.C. 636.

4" air terminal

(field-supplied)

Combustion

Chamber

Fan

Figure 15. Non-Concentric Combustion Air.

Non-Concentric Direct Vent with Vertical Vent.

When the system meets this requirement, vent terminal clearances may be less than that of a nondirect vent system. See Figure 8 for direct vent terminal clearances.

The combustion air pipe may be galvanized material, but if used, the system is a “mechanical vent” system, and the vent terminal clearances must be per the rules for “mechanical vent” systems. See Figure 8.

SECTION 3.

3.1 Gas Piping

The appliance requires an inlet gas pressure of at least 4" w.c. (1.0kPa) and no greater than 13" WC

+ 28 hidden pages

Laars EBP0110, EBP0175, EDP0110, EDP0175, EDN0110 Installation, Operation And Maintanance Manual

Specifications and Main Features

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