Q175S / Q205S Condensing Boiler
Standard Features
Optional Accessories
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Onboard outdoor reset control system with sensor standard
Prebuilt plumbing kit with insulated Low Loss Header
Priority DHW standard (3 way valve not included)
Domestic hot water plate warming
Modulating Ceramic premix burner
5:1 turn down ratio
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3 way valve DHW kit
RS100 Single zone controller
Flue Gas temperature sensor
Room Air Filter
NG to LP conversion Kit
LP to NG Conversion Kit
Spark ignition
Exceeds SCAQMD 1146.2 Low NOx requirements
Stainless Steel Water tube condensing heat exchanger
Direct Vent sealed combustion
Concentric and twin pipe venting adapters included
Approved for room and closet installations
SPECIFICATIONS
General Specifications
Performance Specifications
Boiler
Model
Boiler
Model
Boiler Model
Q175S Q205S
NG/LP NG/LP
Units
Units
Q175S Q205S
Fuel Type
Water content
gal
°F
1.8
1.8
Input
MBH
MBH
%
175
161
95.7
205
189
95.7
Max. supply boiler
temperature
176
176
Heating Capacity
AFUE (I=B=R)
Max operating pressure
Relief valve rating
psi
MBH
psi
45
375
30
45
375
30
Part Load Efficiency
(EN677)
%
98.5
98.5
Relief valve pressure rating
Dry weight
lbs
141
4.0"
10.5"
8.0"
14.0”
141
4.0"
10.5"
8.0"
14.0”
Electrical Specifications
Min inlet gas pressure NG
Max inlet gas pressure NG
Min inlet gas pressure LP
Max inlet gas pressure LP
"W.C.
"W.C.
"W.C.
"W.C.
Boiler Model
Q175S Q205S
120/60 120/60
Units
Electrical Voltage Mains
Electrical Voltage Controls
V/Hz
V
24
24
Max equivalent exhaust
vent length
ft
ft
80
80
40
40
Power Consumption Max
Load
W
W
A
210
234
Max equivalent combustion
air vent length
Power Consumption Stand
by Load
14
15
14
15
Polypropylene,
Stainless Steel,
PVC, CPVC
Recommended Circuit
breaker rating
Approved venting materials
Rinnai is continually updating and improving products; therefore, specifications are subject to change without prior
notice. Local, state, provincial and federal codes must be adhered to prior to installation.
Q175S / Q205S SP
2/2011
© 2011 Rinnai Corporation
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