Navien NCB-240 Bedienungsanleitung

Quick Installation Guide

Model

NCB-180/210/240

STEP 1 Before Installing

Read the Installation & Operation Manual before installing.

This product must be installed and serviced by a licensed

plumber, a licensed gas fitter, or a professional service

technician. Navien is not liable for any damages or

defects

resulting from improper installation.

Whe

n applicable, the installation must conform with

Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280

and/or CAN/CSA Z240 MH Series, Mobile Homes.

Safety

DO NOT install the boiler in areas with excessively high humidity.

Location Requirements

Select the best location on“Choosing an Installation” in the Installation &

Operation Manual.

Allowable minimum clearances

STEP 2 Installing

Unpacking

Checking the Rating Plate

This boiler is configured for Natural Gas

from the factory. If conversion to Propane

Gas in required, the conversion kit supplied

with

the boiler must be used.

Mounting on the Wall

Removing the Front Cover

Remove the

4 screws

Lift up the boiler, rest the unit on the

hooks provided on the wall bracket

on the wall.

Secure the mounting bracket

to the wall with the tapping

screws and anchors.

Drill in the supplied anchor

bolts after considering where

the vent term

ination will be

located.

CAUTION

Do not install the boiler on dry walls without proper reinforcement.

WARNING

•Before connecting the gas supply, determine the gas type and

pressure for the boiler by referring to the rating plate. Use only the

same gas type indicated on the rating plate. Using a different gas

type will result in abnormal combustion and malfunction of the

boiler. Gas supplies should be connected by a licensed professional

only.

•The appliance and its gas connection must be leak tested before

placing the appliance in operation.

•This boiler cannot be converted from natural gas to propane or vice

versa without a Navien gas conversion kit. Do not attempt a field

conversion of this boiler without a Navien gas conversion kit. Doing

so will result in dangerous operating conditions and will void the

warranty.

Navien America Inc. is not liable for any property damage and/or

personal injury resulting from improper conversions.

Navien Combination Boiler

User’s Information Manual,

Installation & Operation Manual

Wall mounting bracket

Tapping screws and anchors

Vent terminators

Wall flanges

Conversion Kit

Spare Parts

Pressure Relief Valve (30PSI)

Flow Restrictors

Clearance

Indoor Installation

Top

9 in (229 mm) minimum

Back

0.5 in (13 mm) minimum

Front

4 in (100 mm) minimum

Sides

3 in (76 mm) minimum

Bottom

12 in (300 mm) minimum

Top

Back

Side

Front

Bottom

WARNING

Follow all local codes and/or the most recent edition of the National Fuel Gas Code

(ANSI Z223.1/NFPA 54) in the USA, or the Natural Gas and Propane Installation Code in

Canada (CAN/CGA B149.1).

Gas Piping Connections

Water Piping Connections

Condensate Drain Connection

A condensate drain pipe must be connected to the 1/2” condensate outlet fitting at

the bottom of the unit and water must be poured into the exhaust connection to fill

the condensate trap.

The end of the 1/2”(NPT) plastic piping should drain into a laundry tub or into a floor

drain.

Do not submerge the end of the

pipe in water.

Note

Syphon

Condensate Outlet

Water

Floor drain

The

boiler is recommended to be the first

appliance to be connected

to the gas supply

line.

Gas meter

’

s capacity

≥

Total gas capacity of connected appliances

Gas supply

Gas

Regulator

Bottom View

Gas Inlet Adapter

Gas Supply Line

Example:

Gas meter

425 CFH

≥

Boiler

195 CFH

Furnace

58.8 CFH

Domestic gas stove

63.7CFH

* 1 C

FH=1,020 Btuh

•

1/2" rigid pipe can be used; refer to the sizing tables in the Installation &

Operation Manual for limitations. Avoid using 1/2" corrugated connectors

or tubing as noise may occur.

Built-in Water Fill Connection

Navien NCB boiler is equipped with

an auto

-feeding water connection

and motorized feeding valve.

Therefore, installation of additional

system water fill connection is not

necessary in most cases.

Note

Backflow

Preventer

Make-up

Water

External Water Fill Connection

Heating

Supply

Expansion Tank

Circulator

Pressure Relief Valve

Air Separator

Warning

Water Piping Connections

Space Heating System

DHW System

Install the included 3/4 in, maximum 30

psi pressure relief valve on the space

heating

supply.

An ASM

E approved HV pressure relief

valve for space heating system is

supplied with the boiler

The DHW pressure relief valve is

not supplied, but is required.

nstall an approved 3/4 in,

maximum 150 psi pressure relief

valve on the hot water

outlet.

Space

eating

Return

Space

Heating

Supply

Pressure Relief

Valve

Pressure

Relief

Valve

Cold Water

Supply

DHW

Supply

Space

Heating

Supply

Space

Heating

Return

DHW

Supply

Cold

Water

Inlet

Built-in

Water Feeder

Connection

Flow Restrictor (for DHW system)

Flow Rate (GPM) and Water Pressure (psi)

Orange

Yellow

Blue

The boiler has a built-in flow restrictor at

the cold water inlet adapter to limit the

overall

DHW flow. Three additional flow

restrictors

are provided for different flow

rates.

Refer to the following graph and install

an appropriate restrictor for your DHW

system.

See the Installation & Operation

Manual (page 21, 22) for detailed

procedures.

Flow Restrictors (Orange, Yellow, and Blue)

Ensure that the Air Vent Cap is removed

before fillin

g the system.

System will not be properly filled

without the air vent cap removed. Air in

the system may cause malfunctions

and system overheating.

Make

-up

Water

Direct to the

external drain

To the drain via

a neutralizer

External drain

To the laundry

tub

To the laundry tub

via a condensate pump

System Fill Connection

The Navien NCB boilers

have a built

-in air vent

on top of the internal

circulator to purge air

from the boiler system.

Air Vent Cap

Before filling the boiler, remove the air vent cap to

allow the s

ystem to fill properly. Replace the cap

when the system is full.

Heating

Return

Venting

Electrical Connections

External LWCO Connection

(if required by local codes)

Power Connection

120 VAC 60 Hz

Min. 2 Amp current with proper

grounding

CAUTION

Using abnormally high or low

AC voltage may cause

abnormal operation, thereby

causing fire which reduces the

life expectancy of this product.

Safety

DO NOT

touch the

power

cord with

wet hands.

DO NOT allow

the boiler to be

exposed to

excessive

amounts of

water.

Front Panel Dip Switch 2 (Set of 2)

Function

Setting

Gas Type

Natural Gas

2-OFF

Propane Gas

2-ON

PCB Dip Switch 2 (Set of 8)

Function

Setting

Temperature

Control

Return Water

1-ON

Supply Water

1-OFF

Thermostat

or Zone

Controller

Unused

(Permanent

Space

Heating

Demand)

7-ON

Used

7-OFF

Exhaust

Thermostat

Temperature

Limit Unused

(CPVC)

8-ON

Setting (PVC)

8-OFF

Front Panel Dip Switch 1 (Set of 10)

Function

Setting

Temperature

Unit

°C (Celsius)

2-ON

°F (Fahrenheit)

2-OFF

Well Pump

3-ON

Off

3-OFF

4 & 5

High Altitude*

0-1,999 ft

(0-609 m)

4-OFF,

5-OFF

2,000-5,399 ft

(610-1,645 m)

4-ON,

5-OFF

5,400-7,699 ft

(1,646-2,346 m)

4-OFF,

5-ON

7,700-10,100 ft

(2,347-3,078 m)

4-ON,

5-ON

* Above 2,000 ft (610 m), the boiler will derate by 4% for

each 1,000 ft (305 m) of altitude gain.

Refer to your local codes to determine if an

LWCO device is required for your system and

ensure that the built

-in device meets the

requirements.

CAUTION

Disconnect the power to

the boiler before installing

any wire connections on

the main PCB.

Confirmation of Panel DIP Switch Settings

Horizontal vent termination

Interior view

Intake Air

Exhaust Gas

Exterior view

12"(300mm)min.

Venting Length

3” pipe venting

2” pipe venting

Exhaust Vent Piping Materials

•All Navien boilers are Category IV appliances.

•The venting system should be approved for use with Category IV

appliances (typically Type BH Special Gas Vent approved by UL 1738-S636).

•Venting requirements in the USA and Canada are different (see below).

Navien recommended venting materials

Locale

Recommended Vent Materials

USA

•

PVC Schedule 40(Solid core)

•

CPVC Schedule 40 or 80(Solid core)

•Approved Polypropylene

Canada*

•

Type BH Special Gas Vent Class IIA (PVC)

•

Type BH Special Gas Vent Class IIB (CPVC)

•

Type BH Special Gas Class IIC (Polypropylene)

* For installation in Canada, field-supplied plastic vent piping must comply with

CAN/CGA B149.1 (latest edition) and be certified to the Standard For Type BH Gas

Venting Systems, ULC-S636. Components of this listed system must not be

interchanged with other vent systems or unlisted pipes or fittings. All plastic

components and specified primers and glues of the certified vent system must be

from a single system manufacturer and must not be intermixed with another system

manufacturer’s parts. The supplied vent connector and vent termination are certified

as part of the boiler.

12"(300mm)min.

Concentric Vent Termination

Sidewall installation

Vent

Combustion Air

1" (25mm) min

Maintain 12" min.

clearance

above

highest

anticipated

snow level or grade.

Roof installation

Vent

Maintain 12" min.

(18" min. for Canada)

learance above highest

anticipated snow level

aximum of 24" above

roof

Combustion

Air

Vent

Combust

ion Air

Maximum number

of elbows: 6

Maximum number

of elbows: 8

2-to-3-inch

reducer

Maximum Length 150'

Maximum

Length 60'

•

90˚elbow = 5 linear feet of venting

•

45˚elbow= 3 linear feet of venting

•

90˚elbow = 8 linear feet of venting

•

45˚elbow= 4 linear feet of venting

Vertical vent termination

36" (900mm) min.

Exhaust

Intake

12"(300mm)min.

12"min. from any

obstruction

above,

below,

left, or right

12"(300mm)min.

Sidewall vent termination

12" (300mm) min.

Vent Termination Options

STEP 3 After Installing

Opening All the Valves

Operating the Boiler

Measuring the Inlet Gas Pressure

Installing the Front Cover

Ensure Maximum Water Flow

After running the boiler for the first 10 minutes, turn it off and clean the cold water

filter and the space heating return strainer to remove any trapped debris.

Final Check

A trial run should be performed in accordance with the Installation checklist listed in

the boiler’s Installation & Operation Manual.

Shut off the manual gas

valve.

Open

Closed

Remove the front cover

by loosening the 4

screws

Loosen the screw indicated in the

figure and connect a manometer t

the pressure port. Reset the

manometer to zero before use.

Open

Check the inlet gas pressure reading on the manometer.

Re-open the manual gas

valve and check for leaks.

Open multiple fixtures

that have high flow rates,

such as bathtub and

shower fauce

ts, to ramp

the boiler up to its

maximum firing rate.

Adjust the inlet gas pressure with

gas regulator.

Gas supply

If not,

NG : 3.5

”~10.5”

: 8.0”~13.5”

Recommended Gas Pressure Settings:

Open a hot water

faucet. The boiler

should turn on and

the gas in the gas

supply line will be

purged.

Leave the faucet on until the boiler

shuts down due to a lack of gas

supply, and then turn off the hot

water faucet

CAUTION

The boiler cannot function properly without sufficient inlet gas pressure.

Measuring the inlet gas pressure should be performed by a licensed professional only.

Power ON

Adjust Temperatures

View Basic Information

Resetting the Boiler

When the power is on, the water

temperature of the space heating

supply will appear with the water

pressure on the front panel

display in 5 second intervals.

1. Press the Mode button three

times. “INFO” will appear on

the display.

Press the + or – buttons to

switch between the

information types.

If an error message appears, you

can try resetting the boiler to

resolve the problem.

Note

Space Heating Temperature

DHW Temperature

Make sure that all hot

water faucets are closed,

and ensure that the

internal circulator and any

external circulating

pumps are off.

Press the Mode button

twice. The DHW mode

icon turns on.

Press + (Up) or – (Down)

buttons until the desired

temperature appears on

the display.

Note

1. Press the Mode button

once. The space heating

icon turns on.

Press the + (Up) or –

(Down)

buttons until the desired

temperature appears on

the display.

DHW temperature

highe

r than 125°F can

cause scalding

If resetting does not solve

the problem,

refer to the

troubleshooting section of

the

User’s Information

Manual

or contact the

service center.

Closed

Shut-off valves

Navien America, Inc.

20 Goodyear, Irvine, CA 92618

Tel: (949) 420

-0420, Fax: (949) 420-0430

www.na

vienamerica.com

Gas Valve

Open

Space Heating System Valves

DHW System Valves

Shut-off valves

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