Bosch GWH C 920 ES - Bosch Gas Tankless Water Heater Specifi Cations

Bosch applications manual | 06.2009BOSCH THERMOTECHNOLOGY CORPORATION
Bosch applications manual
| 11
6.3 Bosch Gas Tankless Water Heater Specifi cations
Technical Specifi cations
Model 260 PN 425 PN 425 HN 715 ES C 800 ES C 920 ES/ESC
Gas input
(BTU/hr)
Min: 30,735 Min: 31,000 Min: 30,735 Min: 19,900 Min: 19,900 Min: 25,000
Max: 74,900 Max: 117,000 Max: 117,000 Max: 199,000 Max: 199,000 Max: 225,000
Minimum fl ow to
activate (GPM)
0.6 0.6 0.6 0.65 0.65 0.65
Maximum fl ow rate
at 45° rise (GPM)
2.6 4.2 4.2 7.2 8.0 9.2
Maximum fl ow rate
at 90° rise (GPM)
1.3 2.1 2.1 3.6 3.9 4.6
Thermal Effi ciency NG: 78%
LP: 78%
NG: 78%
LP: 78%
NG: 80%
LP: 80%
NG: 82%
LP: 82%
NG: 92%
LP: 92%
NG: 94%
LP: 94%
Dimensions
(inches)
H: 28¾
W: 12¼
D: 8½
H: 25¾
W: 16¾
D: 8½
H: 25¾
W: 16¾
D: 8½
H: 30½
W: 17⅞
D: 11¼
H: 30½
W: 17⅞
D: 11¼
H: 30½
W: 17⅞
D: 11¼
Weight (lbs.) 25 33 33 67 74 88
Modulating gas valve yes yes yes yes yes yes
Ignition Standing
pilot
Standing
pilot
Hydro-
generated
Electronic Electronic Electronic
Gas connection ½" Male NPT ¾" Male NPT ¾" Male NPT ¾" Male NPT ¾" Male NPT ¾" Male NPT
Water connections ½" Male NPT ¾" Male NPT ¾" Male NPT ¾" Male NPT ¾" Male NPT ¾" Male NPT
NG gas pressure
(inches of W.C.)
Min: 7
Max: 14
Min: 7
Max: 14
Min: 7
Max: 14
Min: 3.5
Max: 10.5
Min: 3.5
Max: 10.5
Min: 3.5
Max: 10.5
LP gas pressure
(inches of W.C.)
Min: 11
Max: 14
Min: 11
Max: 14
Min: 11
Max: 14
Min: 8
Max: 13
Min: 8
Max: 13
Min: 8
Max: 13
Water pressure
Static - (PSI)
Min: 30
Min (well): 40
Max: 150
Min: 30
Min (well): 40
Max: 150
Min: 30
Min (well): 40
Max: 150
Min: 30
Min (well): 40
Max: 150
Min: 30
Min (well): 40
Max: 150
Min: 30
Min (well): 40
Max: 150
Electrical supply N/A N/A N/A 120VAC 120VAC 120VAC
Venting options Vertical
natural draft
* horizontal
termination
not allowed
Vertical
natural draft
* horizontal
termination
only with AQ4
vent kit
Vertical
natural draft
* horizontal
termination
only with AQ4
vent kit
direct vent
room-sealed
combustion
direct vent
room-sealed
combustion
direct vent
room-sealed
combustion
Venting diameter
(inches)
4 5 5 3 or 4 3 or 4 3 or 4
Vent material Type B-vent
recommended
Type B-vent
recommended
Type B-vent
recommended
Stainless steel
(AL29-4C)
PVC, CPVC,
or ABS
(Schedule 40)
PVC, CPVC,
or ABS
(Schedule 40)
Note:
C 920 ES (residential model) has a maximum setpoint temperature
of 140°F.
C 920 ESC (commercial model) has a maximum setpoint
temperature of 180°F.
Note:
For specifi cations and details on the Bosch GWH 345 ESR and
GWH 450 ESR models, see the GWH 345 ESR and GWH 450 ESR
applications manual.