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Q175C Condensing Boiler
Q175C SP 2/2011
© 2011 Rinnai Corporation
SPECIFICATIONS
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.
Standard Features
• 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
• Built in DHW 6.6 gallon indirect tank
• Modulating Ceramic premix burner
• 5:1 turn down ratio
• Spark ignition
• Exceeds SCAQMD 1146.2 Low NO
x
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
Optional Accessories
• RS100 Single zone controller
• Flue Gas temperature sensor
• Room Air Filter
• NG to LP conversion Kit
• LP to NG Conversion Kit
General Specifications
Units
Water content gal 1.8
Max. supply boiler
temperature
°F 176
Max operating pressure psi 45
Relief valve rating MBH 375
Relief valve pressure rating psi 30
Dry weight lbs 196
Min inlet gas pressure NG "W.C. 4.0"
Max inlet gas pressure NG "W.C. 10.5"
Min inlet gas pressure LP "W.C. 8.0"
Max inlet gas pressure LP "W.C. 14.0”
Max equivalent exhaust vent
length
ft 80
Max equivalent combustion
air vent length
ft 80
Approved venting materials
Polypropylene,
Stainless Steel,
PVC, CPVC
Performance Specifications
Units
Fuel Type NG/LP
Input MBH 175
Heating Capacity MBH 161
AFUE (I=B=R) % 95.7
Part Load Efficiency (EN677) % 98.5
DHW flow rate 75ºF ΔT
Gpm 4.1
Electrical Specifications
Units
Electrical Voltage Mains V/Hz 120/60
Electrical Voltage Controls V 24
Power Consumption Max Load W 210
Power Consumption Stand by Load W 14
Recommended Circuit breaker rating A 15