Product Overview

Greenstar
Condensing Boiler
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
Heating & Tankless Hot Water Heating*
NEW NEW
Greenstar
Combi 100
Greenstar
Combi 131
Greenstar
Combi 151
Greenstar
57
Greenstar
79**
Greenstar
100
Greenstar
131
Greenstar
151
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)
110.2 (50) 103.6 (47)
Dimensions, in (W x H x D) 17
2
/
5
x 33
1
/
2
x 13
9
/
10
Minimum Recommended
Pipe Size, in
1
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'
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'
No De-Rating
up to 6,000'
De-Rating up
3% per 1,000'
Gas Pressure Minimum
inches water column
NG 3.5"
*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
Expansion Vessel
Heating Temperature
Setting
Heatronic III Boiler
Control
Gas Valve
CO
2
Adjustment
Full Modulating Fan
Stainless Steel Burner
Electrode Assembly
Primary Sensor
Limit Stat
Al-Si Heat Exchanger
Digital Display
DHW Temperature
Setting
System Pressure Gauge
Circulating Pump
(Behind Heatronic III)
FW200 Control
(Optional)
Max CO
2
Adjustment
Limit Stat
(Flue Gas)
Plated Stainless Steel
Heat Exchanger
(Behind Heatronic III)
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
u Vents with PVC, CPVC and PP piping
u Simple & intelligent control options available, optimizing
boiler efficiency and fuel consumption
u All models feature ALSi heat exchanger, 3 speed Grundfos
integrated pump, FW200 outdoor reset control, Heatronic
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
§
CERTIFIED
®