Rinnai Q175C User Manual
Q175C Condensing Boiler
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
• Stainless Steel Water tube condensing heat exchanger
• Direct Vent sealed combustion
• Concentric and twin pipe venting adapters included
• Approved for room and closet installations
requirements
x
SPECIFICATIONS
General Specifications
Units
Water content gal 1.8
Max. supply boiler
temperature
Max operating pressure psi 45
Relief valve rating MBH 375
Relief valve pressure rating psi 30
Dry weight lbs 196
°F 176
Optional Accessories
• RS100 Single zone controller
• Flue Gas temperature sensor
• Room Air Filter
• NG to LP conversion Kit
• LP to NG Conversion Kit
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
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
Max equivalent combustion
air vent length
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.
© 2011 Rinnai Corporation
ft 80
ft 80
Polypropylene,
Stainless Steel,
PVC, CPVC
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 SP 2/2011
DIMENSIONS
2.0”
50mm
4.7”
120mm
15”
381mm
10.2”
260mm
Q175C
inch / mm
A Height 26.8 / 680
B Width 39.4 / 1000
C Depth 15.2 / 385
D Left side / vent 19.5 / 495
Center to center / vent and
E
air supply
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
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
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
Back, / center of pipe e, f, k,
U
r, and w
Pipe length vent co-axial
V
Pipe length vent parallel
4.7 / 120
2 / 50
2.6 / 65
5.8 / 147
Clearances
Minimum required
18.6”
474mm
2.1”
54mm
[5.6”
142mm
5.2”
133mm
17.2”
438mm
12”
305mm
19.7”
501mm
Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-364-8643 • www.rinnai.us
Top 2 / 50 10 / 250
Back 0 0
Front 6 / 150 24 / 600
Left side 2 / 50 2 / 50
Right
side
Floor /
Ground
Vent 0 0
clearance to
combustibles and
non-combustibles
inch / mm
2 / 50 2 / 50
12 / 300 30 / 762
clearances
inch / mm
Recommended
service
Loading...