Richmond RMCBH-L125i Super High-Efficiency Condensing Combi Boilers Instructions
- June 13, 2024
- RICHMOND
Table of Contents
Richmond RMCBH-L125i Super High-Efficiency Condensing Combi Boilers
Instructions
FLEXIBLE INSTALLATION
- Moveable combustion air intake (left/right) and ability to flex vent in existing B-vent
- Extra long pipe fittings with notched sides for easy gripping with wrench
- Only 5 moving parts – Fan, Bypass Valve, Pump, Gas Valve, and Damper
- Universal shared platform parts – Easily diagnose and service with common parts for all L-Series units
KEY FEATURES
- Innovative Labyrinth Heat Exchanger with 2 independent copper waterways for 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
- Only Combi Boilers that can be cascaded for both space heating and domestic hot water
- ENERGY STAR® certified with up to 96% AFUE and ASME-rated (excludes 160K combi model).
Parts & Accessories
- **Floor Stand P-267C
**
- **Service Parts Kit P-911R
**
- **EZ Pipe Manifold 251-063, 251-064
**
- **2″ PVC Sidewall Vent Kit P-741
**
- 3″ PVC Sidewall Vent Kit P-742
Dimensions
FRONT
SIDE
Top View
RMCBH-L125i BOTTOM VIEW
RMCBH-L160i, RMCBH-L199i BOTTOM VIEW
Water heater pressure drop – L-Series RMCBH-L125i, RMCBH-L160i & RMCBH-L199
View the boiler head loss – L-Series RMCBH-L125i, RMCBH-L160i & RMCBH-L199i
Specifications
| MODEL NO. | RMCBH-L125i | RMCBH-L160i | RMCBH-L199i |
|---|---|---|---|
| Input Rate (Heating Mode) | MAX | 99,000 BTU/h | 125,000 BTU/h |
125,000 BTU/h
MIN| 16,500 BTU/h| 23,000 BTU/h| 28,500 BTU/h
Output Rate (Heating mode)| MAX| 89,000 BTU/h| 111,000 BTU/h|
111,000 BTU/h
MIN| 15,800 BTU/h| 22,000 BTU/h| 27,100 BTU/h
Input Rate (Domestic Hot Water)| MAX| 125,000 BTU/h| 160,000
BTU/h| 199,000 BTU/h
MIN| 16,500 BTU/h| 23,000 BTU/h| 28,500 BTU/h
AFUE| 95%| 94%| 95%
Gas Pressure (Nat Gas or LP gas)| MAX| 14″ WC
MIN| 4″ WC
Power Supply| 120V/60Hz
Weight lbs. (empty)| 85| 84
Pressure vessel water content – USG| 0.5| 0.19
Boiler Flow Rate – GPM| MAX| 10| 11| 12
MIN| 2
Water Pressure| MAX| DHW 150 psi / Heating 43.5psi
MIN| DHW 40psi / Heating 8psi
Maximum Altitude| 10,100 ft| 10,100 ft| 10,100 ft 3
Ambient temperature – Low (°F)| 32°
Ambient temperature – High (°F)| 122°
Max relative humidity (non-condensing)| 90%
**Temp Range| Heating Mode| 51°F-194°F
Domestic Hot Water| 105°F-149°F
Minimum Activation Flow Rate (DHW)| 0.5 GPM
Gallons per Minute – GPM (Domestic Hot Water)| MAX| 4| 7
67°F Rise| 3.2| 4.1| 5
Gas Connection| 3/4″ Male NPT
Domestic Hot Water Connection| 3/4″ Male NPT
Heating Connection| 1″ Male NPT
Max equivalent vent length 2″ (each side) 2| 65′
Max equivalent vent length 3″ each side)| 120′
Ultra Low NOx| Meets 14ng/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 10 – 16% at 2″ maximum vent length.
- Natural Gas only, LP is 7,800 ft
Specifications
| VENTING | MAXIMUM 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 10 – 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| Cold Domestic Water Connection| 3/4 ” Male NPT
D| Hot Domestic Water Connection| 3/4 ” Male NPT
E| Heating Water Inlet| 1″ Male NPT
F| Heating Water Outlet| 1″ Male NPT
G| Gas Inlet| 3/4 ”_ Male NPT
H| Condensate Outlet| 3/4″ Hose
I| Control Wiring| 7/16″ Rubber Plug
In keeping with its policy of continuous progress and product improvement, Richmond reserves the right to make changes without notice.
Richmond Water Heaters
1115 Northmeadow Parkway, Suite 100, Roswell, Georgia 30076
© Rheem Manufacturing Company • 07/23
FORM NO. T-TK-RMCBH-L Series Rev. 1
