Specifications

ManualsBrandsRinnai ManualsBoilerQ175CP

Q175C Condensing Boiler

Q175C-SP-2 8/2017

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

 Factory Installed Boiler/System Modulating Pump

 Onboard Outdoor Reset Control System with Sensor Standard

 Priority Domestic Hot Water (DHW) Standard

 Built in DHW 6.6 Gallon Indirect Tank

 Modulating Ceramic Premix Burner

 5.0:1 Turndown Ratio

 Spark Ignition

 Exceeds SCAQMD 1146.2 Low NO

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

General Specifications

Water Content (Heating) 1.8 Gal / 7.0 L

Water Content (DHW) 3.7 Gal / 14 L

Max Supply Boiler

Temperature

176 °F / 80 °C

Max Operating Pressure 45 PSI / 310 kPa

Relief Valve Rating 375 MBH / 110 kWh

Relief Valve Pressure Rating 30 PSI / 207 kPa

Unit Weight 196 lbs / 89 kg

Min Inlet Gas Pressure NG 4.0" WC / 10.0 mbar

Max Inlet Gas Pressure NG 10.5" WC / 26.2 mbar

Min Inlet Gas Pressure LP 8.0" WC / 19.9 mbar

Max Inlet Gas Pressure LP 13.5” WC / 33.6 mbar

Electrical Voltage Mains 120 V / 60 Hz

Electrical Voltage Controls 24 V

Power Consumption Max Load 210 W

Power Consumption Standby

Load

14 W

Recommended Circuit Breaker

Rating

15 A

Sound Level 54 dB

Performance Specifications

Fuel Types NG and LP

Input (Heating) 175 MBH / 51.0 kWh

Heating Capacity

162 MBH / 47.5 kWh

Input (DHW) 175 MBH / 51.0 kWh

Minimum Input

NG: 35 MBH / 10.3 kWh

LP: 74 MBH / 21.7 kWh

Turndown Ratio 5.0:1 / 2.4:1 TDR

System Pump Model UPER 20-78

Max Head Pressure at Flow

Rate

15.9 ft at 5.0 GPM

4.8 m at 18.9 LPM

AFUE 95.0%

DHW Flow Rate 75°F ΔT

4.1 GPM / 15.5 LPM

DHW Minimum Activation N/A

Flow Restrictor Color N/A

Max Equivalent Exhaust Vent

Length

80 ft / 24.4 m

Max Equivalent Combustion

Air Vent Length

80 ft / 24.4 m

Approved Venting Materials

Polypropylene, Stainless Steel,

PVC, CPVC

Summary of content (2 pages)

PAGE 1
Q175C Condensing Boiler Standard Features Optional Accessories                  Factory Installed Boiler/System Modulating Pump Onboard Outdoor Reset Control System with Sensor Standard Priority Domestic Hot Water (DHW) Standard Built in DHW 6.6 Gallon Indirect Tank Modulating Ceramic Premix Burner 5.0:1 Turndown Ratio Spark Ignition Exceeds SCAQMD 1146.
PAGE 2
Q175C Condensing Boiler DIMENSIONS Clearances Minimum required clearance to combustibles and non-combustibles Recommended service clearances Top 2” / 50 mm 10” / 250 mm Back 0 0 Front 6” / 150 mm 24” / 600 mm Left side 2” / 50 mm 2” / 50 mm Right side 2” / 50 mm 2” / 50 mm 12” / 300 mm 30” / 762 mm Floor / Ground to bottom of Low Loss Header 0 12” / 300 mm Vent 0 0 Floor / Ground A Height 26.8” / 680 mm B Width 39.4” / 1000 mm C Depth 15.