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Bosch
instantaneous water heaters are available for natural gas or propane -
providing hot water in seconds for a long as needed. They can be installed
as a central system or at point of use for specific requirements. All
units are wall hung, saving valuable floor space.
Since
there is no water storage in the unit, no tank type heater can match them
for economy of operation or ease of installation. Equals up to 30%
savings.
WR400-1
K: Flow controlled, this modulating unit combines high
efficiency with high output, plus low minimum flow rate. Output
temperature may be present to any level between 90°F and 140°F, and the
selected temperature will be maintained within ± 5°F, indefinitely. The
WR400-1 K is suitable for Single Family Residential or
Commercial/Industrial, including use as a 180°F booster for sanitation
systems. The WR400-1 K is compatible with virtually all residential
appliances and plumbing equipment. Simple to install - no field
adjustments needed.
WR400-3KB:
This new electronic ignition unit has no standing pilot
and operates on 2 D' cell batteries with high 80% energy efficiency factor
- high efficiency without hydro dependency.
W125-K:
Small and compact, this unit is popular in cottages, R. V. and marine, hot tubs, portable bush showers, animal grooming, mobile
blind cleaning trucks, mobile food service trucks, etc. Now available for
natural gas and propane.
W400-K5:
Especially designed with 40% less flow resistance for
commercial and industrial high volume steady‑flow applications, they
are ideal for pump recalculation with storage. Our AMS package is easy to
mount adjacent to existing electric tanks for conversion to gas. Can be
used as 180°F booster. Used for radiant floor space heating systems.
Optional power vent packages available.
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SPECIFICATIONS
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FEATURES
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W1 25-K
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W400-K5
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WR400-iK
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WR400-3KB
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•
Pushbutton piezo pilot or electronic ignition
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Automatic flame failure gas cutoff
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Rated
input (BTU/HR
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40,000
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117,000
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117,000
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117,000
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Safety interlocked controls
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Minimum
input (BTU/HR)
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20,000
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58,500
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33,000
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33,000
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Long-Life, high-quality copper heat exchanger
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Maximum
Flow Rate (GPM)
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1.3
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4.0
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4.0
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4.0
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Slow ignition valve that minimizes burner ignition
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Minimum
Flow Rate (GPM)
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0.6
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1.8
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0.5
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0.5
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noise
and sooting to prolong life
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Hot
Water Output (GPM)
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3 - 4 times life of tank type heaters and repairable
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(a)
45° rise (F)
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1.3
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4.0
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(1.0
- 4.0)
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(1.0
- 4.0)
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Available for Natural or LP
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(b)
100° rise (F)
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0.6
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1.8
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(0.5
- 1.8)
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(0.5
- 1.8)
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Overheat protection provided by hi-temp limiter and
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Flue
Size
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4"
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5"
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5"
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5"
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pressure
relief valve
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Water
Inlet (NPT)
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'/2
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'/2
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'/2
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'/z
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Automatic thermally activated overheat shutdown
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Water
Outlet (NPT)
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'/
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'/2
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'/
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'/z
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High-efficiency, low-maintenance stainless steel
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Gas
Inlet (NPT)
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'/
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'/z
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'/z
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'h
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burners
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Overall
Size:
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Pilot and burners protected from clogging by filters
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Height
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253/8
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305/,6
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305/6
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305/,6
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All water contacting parts: copper, brass or stainless
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Width
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105/8
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175/,6
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175/,6
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175/,6
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steel
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Depth
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9'/e
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8"/,6
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8"I,6
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8"/,s
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Easy wall mounting
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Shipping
Weight (Ibs.)
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25
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44
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44
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44
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APPLICATIONS
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Gas
Consumption:
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LP-GAS
(Ibs./hr.)
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0.9 -
1.85
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2.7
- 5.4
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1.5
- 5.4
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1.5
- 5.4
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Agricultural • Restaurants
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NAT
GAS (Cu. F/Hr.)
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18.6
- 37.0
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54.3
- 108.8
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30.6
- 108.8
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30.6
- 108.8
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Food Processing • Fast Food
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Inlet
Water Pressure:
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Film Processing • 180° Boosters
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Min.
pressure for showers
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40
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40
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40
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40
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Spas • Dairy Farms
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Min.
working pressure (PSI)
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13
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8
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13
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13
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Resorts • Residences
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Max.
working pressure (PSI)
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150
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150
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150
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150
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Baptistery pools • Solar Boost and back-up
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Gas
Inlet Pressure Requirements:
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Pressure Cleaning • Shopping Malls
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LP-GAS
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11
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11
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11
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11
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Car Washes • Campgrounds
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NAT.
GAS
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7
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7
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7
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7
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Efficiencies
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Units
may be connected in parallel to accommodate
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Thermal
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81
%
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82%
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82%
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82%
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flow
rates which exceed the capacity of a single
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Energy
Factor (EF)
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N/A
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N/A
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.69
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.80
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heater.
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All
performance specifications are based on 1075 BTU's Per Cubic Foot at
sea-level, water pressure of 50 PSI, 7 column inches natural gas, 11
column inches LP-GAS. Maximum inlet water pressure - 100 PSI, and 50°F
incoming water temperature. Your figures may vary due to the
deviation from these standards
as well as your usage habits.
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