Bosch ZWB28-3, ZWB35-3, ZWB42-3, ZBR16-3, ZBR21-3 User Manual
...
Greenstar Condensing Boiler
Efficient, Affordable, Home Comfort
High efficiency wall hung Greenstar and Greenstar Combi
models available in sizes from 57 to 151 MBH inputs.
New Sizes
Available
Upgrade to the latest, affordable heating technology.
The Greenstar boiler by Bosch is small in size but big in features.
It is ultra quiet, space saving, environmentally friendly, uses
modern condensing technology,
and offers a superior industry
warranty. All at a great price!
But more importantly it will
keep your home warm and
comfortable. The Greenstar is
available in two models—combi
for space and tankless water
heating or the space heating
model which can be used with
our DHW tanks. The Greenstar
is Bosch quality and innovation
at its finest.
Features
u Wall mounted—no floor space required
u Easy to install—hydronic manifold and integral
pump make installation quick and easy
u Fully modulating fan with 5 to 1 turndown for
optimal combustion efficiency
u Combi models provide space heating &
tankless DHW flow rate up to 4 GPM
u Superior warranty—limited lifetime heat
exchanger and 5-year parts & labor
Low NOx
§
Copies of original warranties in their entirety are available at
www.boschheatingandcooling.com
§
Greenstar
Expansion Vessel
Condensing Boiler
Max CO2 Adjustment
u Two Models—space heating only, or combi-boiler for
space heating and up to 4 GPM of tankless water heating
u Ultra-efficient condensing technology—up to 98.7% with
low temperature applications
Plated Stainless Steel
Limit Stat
(Flue Gas)
Heat Exchanger
(Behind Heatronic III)
u Vents with PVC, CPVC and PP piping
u Simple & intelligent control options available, optimizing
Gas Valve
boiler efficiency and fuel consumption
u All models feature ALSi heat exchanger, 3 speed Grundfos
integrated pump, FW200 outdoor reset control, Heatronic
CO2 Adjustment
III boiler control, hydronic manifold bracket, and twin pipe
flue adapter
u 10-Year Full / Limited Lifetime Heat Exchanger Warranty
and Limited 5-Year Parts & Labor Warranty
§
Heating Temperature
Setting
Heatronic III Boiler
Control
Heating & Tankless Hot Water Heating*
NEW NEW
Greenstar
Combi 100
Models ZWB28-3 ZWB35-3 ZWB42-3 ZBR16-3 ZBR21-3 ZBR28-3 ZBR35-3 ZBR42-3
Part Number 7738100002 7738100256 7713331041 7712231416 7738100322 7712231415 7712231414 7712231413
Performance Specifications
Fuel NG / LP
Input Maximum (MBH) 100.8 131.9 151.6 57.2 79.2 100.8 131.9 151.6
Input Minimum (MBH) 34.6 36.0 36.0 12.9 23.9 24.6 36.0 36.0
DOE Heating Capacity (MBH) 89.4 116.7 134.4 50.8 71 89.4 116.7 134.4
Net I=B=R (MBH) 79 103 117 45 62 79 103 117
AFUE 95% 95% 95% 95% 95% 95% 95% 95%
DHW Flow Max (ΔT at 72°F), GPM 2.65 3.2 4.0 not applicable
Water Volume, Gal (L) 0.952 (3.5)
Technical Data
Weight, lbs
(Without Packaging, kg)
Dimensions, in (W x H x D) 172/5 x 331/2 x 139/
Minimum Recommended
Pipe Size, in
Supply Tappings, in 1
Return Tappings, in 1
Domestic Cold Water Supply, in ¾ ¾ not applicable
Domestic Hot Water Supply, in ¾ ¾ not applicable
Gas Connection Size, in ¾
Vent Size, in 2 - 3
Vent Material PVC / CPVC / PP
Combustion Air Size, in 2 - 3
High Altitude Capability
No De-Rating
up to 6,000'
Gas Pressure Minimum
inches water column
*Heat only Greenstar models may be used with indirect water tanks to provide domestic hot water.
**Available late 2013
§
Copies of original warranties in their entirety are available at www.boschheatingandcooling.com
Greenstar
Combi 131
Greenstar
Combi 151
Greenstar57Greenstar
79**
Greenstar
100
110.2 (50) 103.6 (47)
10
1
No De-Rating
up to 6,000'
De-Rating
3% per 1,000'
No De-Rating
up to 6,000'
No De-Rating
up to 6,000'
No De-Rating
up to 6,000'
NG 3.5"
Greenstar
131
No De-Rating
up to 6,000'
CERTIFIED
®
Full Modulating Fan
Stainless Steel Burner
Electrode Assembly
Primary Sensor
Limit Stat
Al-Si Heat Exchanger
Digital Display
System Pressure Gauge
Circulating Pump
(Behind Heatronic III)
FW200 Control
(Optional)
DHW Temperature
Setting
Greenstar
151
De-Rating up
3% per 1,000'
Bosch Thermotechnology Corp.
Londonderry, NH • Ft. Lauderdale, FL
General Inquiries: 1-866-330-2725
Contractor Technical Support: 1-800-283-3787
www.boschheatingandcooling.com
Copyright© 2013 Bosch Thermotechnology Corp. All rights reserved.
75S995006 9/2013
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