BOSCH INSTANTANEOUS WATER HEATERS APPROVED
FOR SPACE HEATING UNDER CLASS IV
When using the Bosch Models W 125-K, W 400-K, WR 400-K, WR
400-1K and WRS 400-K for water heating and space heating the
following requirements shall apply :
All space heating equipment, piping and components connected to the
heater shall be suitable for use with potable water.
Toxic chemicals such as boiler treatment compounds, antifreeze etc,
shall not be introduced into potable water used for space heating.
When used for potable water this unit may not be connected to any
heating system or components previously used solely for space heating.
A temperature mixing valve must be installed where space heating
temperature requirements are higher than normal domestic supply
temperatures to reduce scald hazard potential. Particular care must be
taken to select the correct type of thermal mixing valve to satisfy the
installed application requirements, i.e. If full anti-scald protection is
specified then only that type of valve must be selected that is supported
by the manufacturer’s claim. Below is a typical schematic which should
be used as a guide only.
Always obey the installation instructions supplied by the mixing valve
supplier.
Temperature Mixing
Valve Regulator
check
valve
Feed to Space
Heating Equipment
130°F Hot
Water Service
Cold Water Supply
to tempering regula-
tor
HOT WATER
STORAGE
TANK
Supply to
Bosch Heaters
Return from
Bosch Heaters
and
Space Heating
ASTRAVAN DISTRIBUTORS, LTD.
123 Charles Street
North Vancouver, BC. V7H 1S1
Téléphone (Canada): (604) 929-5488
Téléphone (É.U.): (206) 860-8448
Site Internet: www.astravan.com
