Dimensions Guide
Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-364-8643 • www.rinnai.us
Water Temperature Control
Controller
Controller Cable
Safety Devices
Clearances from Combustibles
(suitable for closet, attic, and
crawl space installations)
Clearances from Non-combustibles
* 24 inches required for serviceability
Min. / Max. Gas Supply Pressure
Manifold Gas Pressure
(inches W.C.)
NOx
Simulation feed forward and feedback
MC-91-2US (part of the front panel)
Deluxe controller: MC-100V-1US (optional)
Bathroom controller: BC-100V-1US (optional)
MCC-91-2US (optional; for hydronic applications)
Non-polarized two-core cable, minimum 22 AWG
Flame failure - Flame Rod
Boiling protection
Combustion fan rpm check
Over current - glass fuse
Top of heater - 6 inches(152mm)
Front of heater - 6 inches(152mm)*
Sides of heater - 2 inches(51mm)
Top of heater - 2 inches(51mm)
Front of heater - 6 inches(152mm)*
Sides of heater - 1/2 inch(13mm)
Natural Gas: min 4” W.C. (10mbar) max 10.5” W.C. (26.1mbar)
Propane Gas: min 8” W.C. (20mbar) max 13.5” W.C. (33.6mbar)
Natural Gas: high fire 2.2” W.C. (5.5mbar) low fire 0.61” W.C. (1.5mbar)
Propane Gas: high fire 3.8” W.C. (9.5mbar) low fire 0.87” W.C. (2.2mbar)
Complies with South Coast Air Quality Management District 14 ng/J or 20
ppm NOx emission levels
Remaining flame (OHS)
Thermal fuse
Automatic frost protection
Back of heater - 0 inches
Ground / bottom - 12 inches(305mm)
From vent pipe - 0 inches
Back of heater - 0 inches
Ground / bottom - 12 inches(305mm)
From vent pipe - 0 inches
V75i (VC2528FFU-US)
B
C
D
E
F
G
0.4~1.8 (10~45) Variable
14.04 (356.6)
22.95 (583)
9.27 (235.5)
5.05 (128.1)
2.67 (67.8)
A
DIMENSION
Inches (mm)
DIMENSION
Inches (mm)
A (GAS)
1.31 (33.2)
D
4.33 (110)
A (COLD)
1.93 (49)
E
2.89 (73.3)
A (HOT)
1.35 (34.4)
F
1.85 (47)
B
4.21 (106.9)
G
3.44 (87.3)
C
1.17 (29.8)
DIMENSIONS
WEIGHT: 45.6 lb (20.7 kg)
Heat exchanger: 10 years* for residential and hydronic applications, increased to 12 years* if
installed with an isolation valve kit; All other parts: 5 years*; Labor: 1 year
(* reduced to 3 years if used as a circulating water heater within a circulation loop, when the water
heater is in series with a circulation system and all circulating water flows through the water heater)
Refer to the manual for complete warranty information.
Limited
Warranty