Rheem RCBH-L125i Residential Gas ThermaForce Super High Efficiency Condensing Combi Boilers Instruction Manual

: June 13, 2024
: Rheem

Table of Contents

Rheem® ThermaForce ™ Super High-Efficiency Condensing Combi Boilers
Flexible Installation
Key Features
Specifications
Parts & Accessories
Dimensions
Parts & Accessories
Documents / Resources

Residential Gas
ThermaForce Super High Efficiency
Condensing Combi Boilers RCBH-L125i, RCBH-L160i
& RCBH-L199i
Indoor Direct Vent
125,000-199,000 BTU/h
Natural Gas/LP Convertible

Rheem® ThermaForce ™ Super High-Efficiency Condensing Combi Boilers

Water heater pressure drop – ThermaForce™ RCBH-L125i, RCBH-L160i & RCBH- L199i

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 ThermaForce ™ 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).

Specifications

MODEL NO.| | RCBH-L125i| RCBH-L160i|

RCBH-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
Warranty1| 10-Year Heat Exchanger, 5-Year Parts, 1-Year Labor

1 See Warranty Certificate for complete information.
2 Approximate input derate of 10 – 16% at 2″ maximum vent length.
3 Natural Gas only, LP is 7,800 ft

VENTING|

MAXIMUM EQUIVALENT LENGTH

---|---
Schedule 40 PVC, CPVC or Polyproyplene| (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
Polyproyplene|
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

Parts & Accessories

Dimensions

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|

In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to make changes without notice.

Residential Gas
ThermaForce Super High Efficiency
Condensing Combi Boilers
Water
Rheem Water Heating • 1115 Northmeadow Parkway, Suite 100
Roswell, Georgia 30076
www.rheem.com
Rheem Canada Ltd./Ltée 125 Edgeware Road, Unit 1
Brampton, Ontario L6Y 0P5
www.rheem.ca
INTEGRATED HOME COMFORT
06/23 WP FORM NO. TK-TF-RCBH

Documents / Resources

| Rheem RCBH-L125i Residential Gas ThermaForce Super High Efficiency Condensing Combi Boilers [pdf] Instruction Manual
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