Rinnai Q175C User manual

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 NOxrequirements
• 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

Q175C
Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: [phone] • www.rinnai.us
DIMENSIONS
inch / mm
A Height 26.8 / 680
B Width 39.4 / 1000
C Depth 15.2 / 385
D Left side / vent 19.5 / 495
E Center to center / vent and
air supply 4.7 / 120
F Back / vent 10.6 / 270
G Left side / gas pipe 2.6 / 65
H Left side / supply pipe 7.3 / 185
J Left side / return pipe 17.5 / 445
K Left side / condensate pipe 20.9 / 530
P Pipe length of g 0.7 / 18
Q Pipe length of c 2 / 50
R Pipe length of e, f, k, r, and w 2.3 / 60
S Back / center of pipe c 1 / 25
T Back / Center of pipe g 1.6 / 40
U Back, / center of pipe e, f, k,
r, and w 2 / 50
V Pipe length vent co-axial
Pipe length vent parallel 2.6 / 65 5.8 / 147
L Left side / expansion pipe 23.2 / 590
N Left side / cold water pipe 34.8 / 885
O Left side / hot water pipe 37.6 / 955
Top 2 / 50 10 / 250
Back 0 0
Front 6 / 150 24 / 600
Left side 2 / 50 2 / 50
Right
side 2 / 50 2 / 50
Floor /
Ground 12 / 300 30 / 762
Vent 0 0
inch / mm
Minimum required
clearance to
combustibles and
non-combustibles
Recom-
mended
service
clearances
inch / mm
Clearances
2.0”
50mm
2.1”
54mm [5.6”
142mm
10.2”
260mm
12”
305mm
15”
381mm
4.7”
120mm
5.2”
133mm 17.2”
438mm 19.7”
501mm
18.6”
474mm