Rinnai Water Heater Q175CP Specifications

Q175C Condensing Boiler

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

SPECIFICATIONS

General Specifications

Water Content (Heating) 1.8 Gal / 7.0 L

Water Content (DHW) 3.7 Gal / 14 L

Max Supply Boiler Temperature

Max Operating Pressure 45 PSI / 310 kPa

176 °F / 80 °C

Optional Accessories

 RS100 Single Zone Controller  Flue Gas Temperature Sensor  Room Air Filter  NG to LP Conversion Kit  NG to LP Conversion Kit

Performance Specifications

Fuel Types NG and LP

Input (Heating) 175 MBH / 51.0 kWh

Heating Capacity

162 MBH / 47.5 kWh

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

Recommended Circuit Breaker Rating

Sound Level 54 dB

14 W

15 A

Input (DHW) 175 MBH / 51.0 kWh

Minimum Input

Turndown Ratio 5.0:1 / 2.4:1 TDR

System Pump Model UPER 20-78

Max Head Pressure at Flow Rate

AFUE 95.0%

DHW Flow Rate 75°F ΔT

DHW Minimum Activation N/A

Flow Restrictor Color N/A

Max Equivalent Exhaust Vent Length

Max Equivalent Combustion Air Vent Length

Approved Venting Materials

NG: 35 MBH / 10.3 kWh LP: 74 MBH / 21.7 kWh

15.9 ft at 5.0 GPM

4.8 m at 18.9 LPM

4.1 GPM / 15.5 LPM

80 ft / 24.4 m

Polypropylene, Stainless Steel,

PVC, CPVC

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.

Q175C-SP-2 8/2017

DIMENSIONS

Q175C Condensing Boiler

A Height

B Width 39.4” / 1000 mm

C Depth 15.2” / 385 mm

D Left Side / Vent 19.5” / 495 mm

Center to Center / Vent and Air

Supply

F Back / Vent 10.6” / 270 mm

G Left Side / Gas Pipe 2.6” / 65 mm

H Left Side / Supply Pipe 7.8” / 199 mm

J Left Side / Return Pipe 19.8” / 504 mm

K Left Side / Condensate Pipe 20.9” / 530 mm

L Left Side / Expansion Tank 23.2” / 590 mm

N Left Side / Cold Water Pipe 34.8” / 885 mm

O Left Side / Hot Water Pipe 37.6” / 955 mm

P Pipe Length of G 0.7” / 18 mm

Q Pipe Length of C 2” / 50 mm

R Pipe Length of F and R 18.5” / 470 mm

T Back / Center of Pipe C 1” / 25 mm

U Back / Center of Pipe G 1.6” / 40 mm

Back / Center of Pipes f1, e, k,

r1, and w

V2 Back/ Center of Pipes f2 and r2 2.1” / 54 mm

26.8” / 680 mm

4.7” / 121 mm

2” / 50 mm

Pipe Length Vent Co-axial

Pipe Length Vent Parallel

Bottom Side Boiler to Center

Clearances

Minimum required

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

Floor / Ground 12” / 300 mm 30” / 762 mm

Floor / Ground to bottom of Low Loss Header

Vent 0 0

Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-364-8643 • www.rinnai.us

clearance to

combustibles and

non-combustibles

0 12” / 300 mm

Recommended

service clearances

Pressure Relief Valve

Bottom Side Boiler to Center

Low Loss Header

Z Center to Center of f2 and r2 12” / 305 mm

aa Depth of Low Loss Header 5.6” / 142 mm

2.6” / 65 mm

5.8” / 147 mm

8” / 200 mm

10.4” / 265 mm

Q175C-SP-2 8/2017