Lochinvar CF1261 Installation Manual

DESIGNER’S GUIDE COPPER-FIN II®WATER HEATER

400,000 – 2,070,000 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 water heater 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 this 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

Nashville, TN • 615-889-8900 • Fax: 615-547-1000

Lochinvar DESIGNER’S GUIDE COPPER- FIN II WATER HEATER 615-889-8900 1

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

Combustion & Ventilation Air . . . . . . . . .6

Contaminants . . . . . . . . . . . . . . . . . . . .7

Determining Total “Free Area” . . . . . . . .7

Electrical Requirements . . . . . . . . . . . .20

Gas Supply . . . . . . . . . . . . . . . . . . . .17

General Venting . . . . . . . . . . . . . . . . . .7

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

Low Water Temperature Delivery . . . . .18

Outdoor Use . . . . . . . . . . . . . . . . . . . .4

Outdoor Installation . . . . . . . . . . . . . .16

Pump Operation . . . . . . . . . . . . . . . . .19

Relief Valve . . . . . . . . . . . . . . . . . . . .20

Venting Options . . . . . . . . . . . . . . . . . .9

Water Connections . . . . . . . . . . . . . . .18

Water Treatment . . . . . . . . . . . . . . . . .19

Water Velocity Control . . . . . . . . . . . .19

Figures & Tables Index

FIG. 1 Models CF 991-2071

Requirements For Installation

Over Combustible Floor . . . . .3

FIG. 2 Models CF 401-751

Special Combustible

Floor Base . . . . . . . . . . . . . . .4

FIG. 3 Water Heater Equipment

& Control Orientation . . . . . . .5

FIG. 4-7 Combustion &

Ventilation Air . . . . . . . . . . .6,7

FIG. 8 Barometric Damper

Installation . . . . . . . . . . . . . . .9

FIG. 9 Multiple Unit Barometric

Damper Installation . . . . . . .10

FIG. 10 Powered Sidewall Venting

(Powered Vent Cap Shown) . . .10

FIG. 11 Powered DirectAire Horizontal

(Powered Vent Cap Shown) . . .11

FIG. 12 Vertical Vent & Air Inlet . . . . .13

FIG. 13 Vertical Vent & Sidewall

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

FIG. 14 Aire-Lock Direct Vent . . . . . . .14

FIG. 15 Sidewall Vent . . . . . . . . . . . .15

FIG. 16 Outdoor Venting . . . . . . . . .16

TABLE A. Combustible Floor Kits . . . . . . .3

TABLE B. Clearances From

Combustibles . . . . . . . . . . . . .4

TABLE C. Flue Sizes & Inlet

Air Pipe Sizes . . . . . . . . . . . .9

TABLE D. Powered Sidewall Vent Kits . .11 TABLE E. Power DirectAire

Horizontal

Vent Kits . . . . . . . . . . . . . . .12

TABLE F. DirectAire Vertical Air

Inlet Kits . . . . . . . . . . . . . . .14

TABLE G. Direct Vent Kits . . . . . . . . . . .15

TABLE H. Sidewall Vent Kits . . . . . . . . .16

TABLE I. Outdoor Kits . . . . . . . . . . . .17

TABLE J. Gas Supply Pipe Sizing . . . .17

TABLE K. Inlet Gas Pressure . . . . . . . . .18

TABLE L. Required Temperature Rise . .19 TABLE M. Required Pump Performance .19 TABLE N. Common Water

Manifold Sizes . . . . . . . . . . .20

TABLE O. Amp Draw . . . . . . . . . . . . .20

Water Heater Piping Diagrams

Single Heater – Single Tank . . . . . . . . .A1

Single Heater – Two Tanks . . . . . . . . .A2

Two Temperature Installation

Single Heater – Single Tank . . . . . . . . .A3

Two Heaters – Single Tank . . . . . . . . .A4

Two Heaters – Two Tanks . . . . . . . . . .A5

Multi-Stack Frame

Two Heaters Single Tank . . . . . . . . . . .A6

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 shall be carefully followed in all cases. Authorities having jurisdiction shall be consulted before installations are made.

In the absence of such requirements, the installation shall 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, ASME CSD-1.

Where required by the authority having jurisdiction, the installation must comply with the Canadian 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.

2 Lochinvar DESIGNER’S GUIDE COPPER- FIN II WATER HEATER 615-889-8900

Lochinvar

Water Velocity

(See page 19 for Required

Temperature Rise chart.)

Factory Supplied Pump

Capacity

(See page 19 for Pump Operation.)

Manifold Pipe Size

When using more than one heater

(See page 20 for Common Water

Manifold Size for Multiple Water

Heater Installation Table.)

Storage Tank Circulating

Tappings

(See page 20 for Manifold Pipe

Size.)

Placement of Cold Water

Inlet and Building Return

(See Pages Appendix A for Water

Heater Piping Diagrams.)

Water Hardness

(

See page 19 for Water Treatment

Information.)

In designing

a water heater system,

pay special attention to:

The indoor units 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.).

The appliance must be installed on a level, non-combustible floor. Concrete over wood is not considered a non-combustible floor. Maintain required clearances from combustible surfaces.

For installation on a combustible floor only when installed on special base: Units installed over a

combustible floor MUST use the Special Combustible Floor Base. The unit must be centered on the base as shown in FIG. 1.

• Provide a base of hollow clay tile or

concrete blocks from 8” to 12” thick and extending 24” beyond the sides.

• The blocks must be placed in line so

that the holes line up horizontally to provide a clear passage through the blocks.

• This procedure should also be

followed if electrical conduit or radiant heat distribution piping runs through the floor and beneath the appliance.

• Ensure that combustible floor base meets local fire code requirements.

• The correct kit number for the required base is noted on the rating plate of each unit and listed in Table A.

Lochinvar DESIGNER’S GUIDE COPPER- FIN II WATER HEATER 615-889-8900 3

(FIG. 1) CF 991-2071 REQUIREMENTS FOR

INSTALLATION OVER COMBUSTIBLE FLOOR

(TABLE A)

COMBUSTIBLE FLOOR KITS

MODEL NUMBER KIT NUMBER

CF401 CFK3301

CF501 CFK3302

CF651 CFK3303

CF751 CFK3304

Under no circumstances is the manufacturer to be held responsible for water damage in connection with this unit or any of its components.

4 Lochinvar DESIGNER’S GUIDE COPPER- FIN II WATER HEATER 615-889-8900

Outdoor models require the installation of an optional vent cap. Instructions for placement of the vent cap are included in the venting section.

Outdoor models must not be installed directly on the ground. The outdoor unit must be installed on a concrete brick, block or other non-combustible pad. Outdoor models have additional special location and clearance requirements. (See Outdoor Venting Pg. 16)

SPECIAL LOCATION: OUTDOOR USE

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 16.

Lochinvar

(FIG. 2) MODELS CF 401-751 INSTALLED WITH

OPTIONAL COMBUSTIBLE FLOOR BASE

(TABLE B) – CLEARANCES FROM COMBUSTIBLES

CLEARANCES CF 401-751 CF 991-2071

Right Side 1” 3”

Rear 1” 3”

Left Side 6” 3”

(24” for Service) (24” for Service)

Front ALCOVE* ALCOVE*

(24” for Service) (30” for Service)

Top 1” 3”

Flue 1”** 1”**

Hot Water Pipes 1” 1”

* Alcove is a closet without a door. ** Consult local codes and/or vent manufacturer.

Lochinvar DESIGNER’S GUIDE COPPER- FIN II WATER HEATER 615-889-8900 5

(FIG. 3) WATER HEATER EQUIPMENT AND CONTROL ORIENTATION.

OPERATOR INTERFACE

PANEL

GAS

CONNECTION

DRAIN

LEFT SIDE

OPERATOR INTERFACE

PANEL

BURNER INSPECTION PORT

FRONT

AIR INLET

HOT WATER

OUTLET

COLD WATER

INLET

FLUE PRODUCTS VENT

120V ELECTRICAL

CONNECTION

TERMINAL

STRIP

CF401-751

CF991-2071

FLUE PRODUCTS VENT

GAS CONNECTION

TERMINAL STRIP

DRAIN

BURNER INSPECTION PORT

LEFT SIDE

FRONT

COLD WATER INLET

HOT WATER OUTLET

AIR INLET

BACK

6 Lochinvar DESIGNER’S GUIDE COPPER- FIN II WATER HEATER 615-889-8900

COMBUSTION & VENTILATION AIR

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; 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.

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 input (5.5cm

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 input (5.5cm

per kW). This opening

must be located within 12” (30cm) 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 input (11cm

per kW).

If air is taken from another interior space, each of the two openings

specified above should have a net free

Lochinvar

EXAMPLE OF

SIZING FOR

COMBUSTION

& VENTILATION

AIR OPENINGS

(WATER HEATER

WITH 2,070,000

Btu/hr INPUT):

When combustion and

ventilated air is taken

from directly outside the

building (FIG. 4), divide

the total BTU’s by 4,000.

This yields 517.5 sq.in.

of “Free Area” without

restriction.

(2,070,000 ÷ 4000 =

517.5 sq.in.)

Since the air opening is

50% closed due to

screens and louvers, the

total opening must be

multiplied by 2.

(517.5 sq. in. x 2 =

1,035 sq.in.)

This project requires one

Ventilation Air Opening

with net “Area” of

1,035 square inches with

louver dimensions of 30”

x 35” and one

Combustion Air Opening

with net “Area” of

1,035 square inches with

louver dimensions

of 30” x 35”.

(FIG. 4) COMBUSTION AIR DIRECT FROM OUTSIDE

(FIG. 5) COMBUSTION AIR THROUGH DUCTWORK

(FIG. 6) COMBUSTION AIR FROM AN

INTERIOR SPACE

CAUTION: Under no circumstances should the equipment room be under a negative pressure when atmospheric combustion equipment is installed in the room.

area of one square inch for each 1000 Btu (22cm

per kW) of input, but not less

than 100 square inches (645 cm

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 input (7cm

per kW). This

opening must be located within 12” (30cm) of the top of the enclosure.

CONTAMINANTS

Combustion air drawn from an interior or exterior space must be free of any chemical fumes which could be corrosive to the water heater. Burning chemical fumes results in the formation of corrosive acids which attack the water heater, cause improper combustion and premature failure of the water heater 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

These water heaters are classified as Category I appliances when tested to the latest ANSI Standard. This classification requires all conventionally vented combustion products to be vented using Category I listed vent pipe.

Additionally, it is recommended that this vent material be double wall construction or insulated in the field. A Category I appliance operates with a non-positive static vent pressure and with flue loss greater than 17 percent.

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. 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

Lochinvar DESIGNER’S GUIDE COPPER- FIN II WATER HEATER 615-889-8900 7

(FIG. 7) COMBUSTION AIR FROM OUTSIDE,

SINGLE OPENING

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 by sized such to make sure that it does not cause drafts which could lead to nuisance operational problems with the water heater.

8 Lochinvar DESIGNER’S GUIDE COPPER- FIN II WATER HEATER 615-889-8900

Category I double wall vent (or equivalent) connectors and sized according to vent sizing tables (FAN column) in the latest edition of the National Fuel Gas Code.

The Category I vent and accessories, such as firestop spacers, thimbles, caps, etc., must be installed in accordance with the vent manufacturer’s listing. The vent connector and firestop must 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 an existing building should be corrected when new equipment is installed, so the installation conforms to the latest edition of the National Fuel Gas Code, ANSI Z223.1.

When resizing any portion of the common venting system, it should be resized to approach the minimum size as determined using the appropriate tables in the National Fuel Gas Code.

The weight of the venting system must not rest on the water heater. The venting system must be adequately supported in compliance with local codes and other applicable codes.

Vent Terminations

The vent terminal should be vertical and exhaust outside the building at least 2 feet (0.6m) above the highest point of the roof when within a 10 foot (3.05m) radius.

Additionally, vertical terminations must be a minimum of 3 feet (0.9m) above the roof line, and when less than 10 feet (3.05m) from a parapet wall must be a minimum of 2 feet (0.61m) higher than the parapet wall.

Vent caps should have a minimum clearance of 4 feet (1.2m) horizontally from, and in no case above or below [unless a 4 feet (1.2m) horizontal distance is maintained], electric meters, gas meters, regulators and relief equipment.

Maintain a distance of at least 3 feet (0.9m) above any forced air inlet within 10 feet (3.05m) and a distance of at least 4 feet (1.2m) below, 4 feet (1.2m) horizontally from, or 1 foot (30cm) above any door, window or gravity air inlet.

Do not terminate the vent in a window well, stairwell, alcove, courtyard or other recessed area. The vent can not terminate below grade. The bottom of the vent terminal shall be located at least 12 inches (30cm) above grade and clear of snow, ice, leaves or other debris.

The distance of the vent terminal from adjacent public walkways, adjacent buildings, windows, and building openings

Lochinvar

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