RUUD RUHBH-L99i Residential Gas RUHBH L-Series Boilers Instruction Manual
- June 13, 2024
- RUUD
Table of Contents
Ruud Residential Gas
RUHBH L-Series Boilers
RUHBH-L99i & RUHBH-L120i
Indoor Direct Vent
99,000-120,000 BTU/h
Natural Gas/LP Convertible
Ruud® L-Series Super High-Efficiency Condensing Boilers
Flexible Installation
- Moveable combustion air intake (left/right) and ability to flex vent in existing B-vent
- Extra long pipe fittings with notched sidesfor easy gripping with wrench
- Only 4 moving parts – Fan, Pump, Gas Valve, and Damper
- Universal shared platform parts – Easily diagnose and service with common parts for all L-Series units
Key Features
- Innovative single pass Labyrinth Heat Exchanger with Integrated copper waterways ensures maximum heat transfer and minimal heat loss
- Built-in ECM variable speed, high efficiency boiler pump
- Built-in Illuminated Touchscreen Control Panel
- Outdoor reset technology increases efficiency by lowering water temperature automatically
- Wireless cascading using RF balances workload of each unit for longer life
- ENERGY STAR® certified with up to 96% AFUE and ASME-rated
Specifications
| MODEL NO. | RUHBH-L99i | RUHBH-L120i | |
|---|---|---|---|
| Input Rate | MAX | 99,000 BTU/h | 120,000 BTU/h |
| MIN | 15,500 BTU/h | 13,650 BTU/h | |
| Output Rate | MAX | 89,000 BTU/h | 108,000 BTU/h |
| MIN | 14,800 BTU/h | 13,000 BTU/h | |
| AFUE | 96% | 95% |
Gas Pressure
(Nat Gas or LP gas)
| MAX| 14″ WC
MIN| 4″ WC
Power Supply| 120V/60Hz
Weight lbs. (empty)| 85
Pressure vessel water content – USG| 0.5
Boiler Flow Rate – GPM| MAX| 10| 11
MIN| 2
Water Pressure| MAX| 43.5psi
MIN| 8psi
Maximum Altitude| 10,100 ft
Ambient temperature – Low (°F)| 32°
Ambient temperature – High (°F)| 122°
Max relative humidity (non-condensing)| 90%
Temperature Range| 51°F – 194°F
Gas Connection| 3/4″ Male NPT
Max equivalent vent length 2″ (each side) 2| 65′
Max equivalent vent length 3″ each side)| 120′
Ultra Low NOx| Meets 14 ng/J NOx requirements – SCAQMD Rule 1146.2
compliant
Warranty 1| 10-Year Heat Exchanger, 5-Year Parts, 1-Year Labor
- See Warranty Certificate for complete information.
- Approximate input derate of 5 – 16% at 2″ maximum vent length.
Ruud Residential Gas
RUHBH L-Series Boilers
View the boiler head loss – L-Series RUHBH-L99i & RUHBH-L120i
Specifications
| VENTING | MAX EQUIVALENT LENGTH |
|---|---|
| Schedule 40 PVC, CPVC, or Polypropylene | (each side) |
| 2″ | 65’2 |
| 3″ | 120′ |
| 2″ or 3″ 90° Long Sweep Vent Elbow | Allow 5 equivalent feet |
| 2″ or 3″ 90° Short Sweep Vent Elbow | Allow 8 equivalent feet |
| 2″ or 3″ 45° Vent Elbow | Allow 3 equivalent feet |
| Polypropylene | |
| PPs 87-90° Elbow | Allow 8 equivalent feet |
| Flex PPs | |
| 3″ PPs Flex | 35′ Actual (Equivalent = Actual x 1.4) |
2 Approximate input derate of 5 – 16% at 2″ maximum vent length.
__
SURFACE
| MIN. DISTANCE FROM COMBUSTIBLE SURFACES| RECOMMENDED DISTANCE
FOR INSTALLATION AND SERVICE
---|---|---
Front| 2 “| 24 “
Rear| 0 “| 0 “
Left Side| 1.5 “| 6 “
Right Side| 4 “| 6 “
Top| 2 “| 24 “
Bottom| 8 “| 24 “
| PIPING CONNECTIONS| DIMENSION
---|---|---
A| Exhaust Outlet| 2″ Schedule 40 PVC
B| Combustion Air Inlet| 2″ Schedule 40 PVC
C| Heating Water Inlet| 1″ Male NPT
D| Heating Water Outlet| 1″ Male NPT
E| Gas Inlet| 3/4 ” Male NPT
F| Condensate Outlet| 3/4″ Hose
G| Control Wiring| 7/16″ Rubber Plug
Dimensions
Parts & Accessories
In keeping with its policy of continuous progress and product improvement, Ruud reserves the right to make changes without notice.
Ruud Water Heating • 1115 Northmeadow Parkway, Suite 100, Roswell, Georgia
30076 • www.ruud.com
06/23 FORM NO. TKR-RUHBH L-SERIES