Bosch WR 400-7.K Series User Manual

6 720 606 560 CA (05.05) AL
ASTRAVAN DISTRIBUTORS, LTD.
123 Charles Street
North Vancouver, B.C. V7H 1S1
Phone Canada: (604) 929-5488
Phone USA: (206) 860-8448
Web Site: www.astravan.com
Note: In case of problems please contact your salesman or installer
NOTICE TO INSTALLER: Please leave this
manual with the owner or affix adjacent to
appliance.
Instantaneous gas water heater
WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property
damage, personal injury or death.
- Do not store or use gasoline or other flamma-
ble vapors and liquids in the vicinity of this or
any other applicance.
- 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
neighbor’s 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 the gas
supplier.
READ INSTRUCTIONS CAREFULLY BEFORE INSTALLING
ELECTRONIC IGNITION
Model
WR 400-7.K..
• installation
• operation
• maintenance
The Bosch instantaneous water heater is a high efficiency,
space saving answer to your water heating needs. All Bosch
instantaneous water heaters heat water only as required; no
energy is lost maintaining a large volume of water at elevated
temperatures as in tank-type storage water heaters.
Suitable for heating potable water only – not approved for
space heating purposes.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Bosch WR 400-7.K Series Specifications

General

Brand	Bosch
Model	WR 400-7.K Series
Category	Water Heater
Language	English

Summary

READ INSTRUCTIONS CAREFULLY BEFORE INSTALLING

WHAT TO DO IF YOU SMELL GAS

Steps to follow if you smell gas to prevent fire or explosion.

DIMENSIONS

INSTALLATION INSTRUCTIONS

LOCATION

Guidance on choosing a suitable installation site for the water heater, considering proximity and freezing.

AIR REQUIREMENTS

Essential information on providing adequate air for combustion and ventilation for safe operation.

MOUNTING

CLEARANCE

DRIP TRAY

VENTING

WATER CONNECTIONS

RELIEF VALVE

GAS CONNECTION

OPERATING INSTRUCTIONS

FILLING

Steps to correctly fill the water heater and piping system before operation.

LIGHTING AND OPERATING INSTRUCTIONS

Detailed steps for lighting the appliance and normal operation.

TO TURN OFF GAS TO APPLIANCE

Procedure for safely shutting off gas supply to the appliance.

SERVICE HINT

Advice on cleaning the water inlet strainer for optimal performance.

PRESSURE REGULATION

TEMPERATURE REGULATION

HIGH TEMPERATURE LIMIT SWITCH

MAINTENANCE AND SERVICE

Vent System

Annual checks, cleaning, and repair of the vent system.

Water Valve

Periodic servicing of the water valve and replacement of diaphragm.

Pilot Flame

How to identify and correct issues with the pilot flame.

Main Burner Flames

Guidance on interpreting main burner flame color for diagnosis.

Mineral Scale Build-up

Information on scale buildup and necessary descaling procedures.

Flue gas safety device

Importance and function of the flue gas safety device.

Operation and safety precautions

Safety measures during operation and what to do if the appliance shuts down.

TROUBLE SHOOTING

NO SPARK AT THE PILOT

Identifies common causes for the pilot not sparking.

SPARKS APPEAR AT PILOT WHEN HOT WATER TAP TURNED ON, BUT PILOT AND BURNERS WILL NOT IGNITE

Diagnoses why the pilot ignites but burners do not.

PILOT LIGHTS BUT BURNERS WILL NOT COME ON

MAIN BURNERS GO OUT DURING HOT WATER USE

WATER IS TOO HOT

WATER IS NOT HOT ENOUGH

HOT WATER TEMPERATURE FLUCTUATES