Rheem CRTGH-S-SR Tankless Water Heaters Owner’s Manual
- June 3, 2024
- Rheem
Table of Contents
Rheem CRTGH-S-SR Tankless Water Heaters
CRTGH-S/SR Models (Non-recirculation S Models COMING SOON!)
Indoor Models
11,000-199,900 BTU/h Natural Gas/LP Convertible
Easy Installation
- PVC Vent runs up to 70′ (2″), 150′ (3″)
- Easy set up with full text digital display and no dip-switches
- Field gas convertible from natural gas to LP
- conversion kit included
Ready for Retrofits
- Allows flex venting through existing B-vent up to 50′
- 1/2″ Gas line compatibility (subject to local code)
Key Features
- Stainless steel Primary and Secondary heat exchangers provide increased efficiency and durability
- Hot-start programming™ ensures the unit is in a ready state between back-to-back usage, avoiding any cold water bursts –Rheem® Exclusive!
- Built-in Recirculation pump for instant hot water at the tap (SR models)
- Built-in EcoNet® wifi capability for direct control from your device (optional for S models)
Specifications
COMING SOON!
Rheem Model Number| CRTGH-S84i CRTGH-SR84i| CRTGH-
S10i CRTGH-SR10i| CRTGH-S11i CRTGH-SR11i
---|---|---|---
Gas Input Rate| MAX| 157,000 BTU/h| 180,000 BTU/h| 199,900
BTU/h
MIN| 11,000 BTU/h| 11,000 BTU/h| 11,000 BTU/h
Uniform Energy Factor (UEF)| 0.96
Gallons Per Minute (GPM)| MAX (35°F)| 8.4| 10.1| 11.2
45°F Rise| 6.9| 7.9| 8.8
67°F Rise| 4.6| 5.3| 5.9
Number of Bathrooms 1| __| __|
Temp. Range| 85°F – 140°F
Temp. Setting from Factory| 120°F
Installation Type| Indoor
Fuel Type| Compatible with Natural Gas and LP (ships NG with LP
conversion kit included)
Heat Exchanger Material| Primary: Stainless Steel – Secondary:
Stainless Steel
Minimum Activation Flow| 0.4 GPM
Minimum Continuous Flow| 0.26 GPM
Maximum Altitude| 10,200 ft.
Ultra Low NOx| Yes (SCAQMD compliant)
__
Warranty
| 15 Year Heat Exchanger – (w/ registration) 12 Year Heat Exchanger – (w/o
registration) 5-Year Parts | 1-Year Labor
Model Number| CRTGH-S CRTGH-SR
---|---
Height| 28-9/16″
Width| 17-5/16″
Depth| 13-11/16″
Weight| 77.6lbs| 86lbs
Venting Diam. Allowed| 2″ / 3″
Max. Single Vent Run (straight pipe)| 70 ft (2″)/
150 ft (3″)
Venting Materials| ULC-S636 PVC, CPVC, PP
Common Venting (max. units)| 2 units3
Flex Venting| Allowed: 2″ up to 50′
Manifold Controls (max. units)| Up to 20 units without
external control required4
Controls| Built-in digital display with full-text menus
Power Supply| 120V 60Hz
__
Max. Power Consumption
| 85W (Normal use), 0.7Amps
132W (Anti freeze only), 1.1Amps 3.5W (Standby), 0.03Amps5
| 100W (Normal use), 0.83Amps 200W (Anti freeze), 1.67Amps 3.5W (Standby),
0.03Amps5
Gas Connection| 3/4″ NPT
Hot Water Connection| 3/4″ NPT
Cold Water Connection| 3/4″ NPT
Condensate Connection| 1/2″ NPT
Vent Connections Diameter| 2″ Band Connections (Adapter required to vent
with 3″ PVC from unit)
Clearances
Top / Bottom| 12″
Front| 1/2″6
Sides| 1/2″
Back / From Vent Pipe| 0″
Recirculation Length (SRi Models)
Pipe Diameter| Max. Recirculation Loop
3/4″| 400 ft.
1/2″| 100 ft.
1 Based on simultaneous showers using 2.5 GPM flow rate pre-mixed with cold water line. Flow rates vary depending on temperature of incoming cold water and water heater set temperature. Refer to flow rate curves for accurate sizing. 2 For indoor application, this is the temperature of outdoor intake air. 3 External check valve required for installation. 4 Manifolds with standard RJ25 communication cables. 5 If anti freeze is on and combustion is on, total W will be 217W (85+132). 6 Recommended 24″ clearance for service.
Water Heater Flow Rate Curves
| Model Number | 35° 45° | 50° | 60° | 67° | 70° | 80° | 90° 100° |
|---|---|---|---|---|---|---|---|
| CRTGH-S84i/SR84i Water Flow (GPM) | 8.4 6.9 | 6.2 | 5.2 | 4.6 | 4.4 | 3.9 | 3.4 |
| CRTGH-S10i/SR10i Water Flow (GPM) | 10.1 7.9 | 7.1 | 5.9 | 5.3 | 5.1 | 4.4 | 3.9 |
| CRTGH-S11i/SR11i Water Flow (GPM) | 11.2 8.8 | 7.9 | 6.6 | 5.9 | 5.6 | 4.9 | 4.4 |
Venting
SINGLE UNIT: MAX. EQUIVALENT VENT LENGTHS – STRAIGHT PIPE
Number of 90 Elbows| Max Length 2″ straight pipe|
Max. length 3″ straight pipe
0| 70 ft. (21.3 m)| 150 ft. (45.7 m)
1| 64 ft. (19.5 m)| 145 ft. (44.2 m)
2| 58 ft. (17.7 m)| 140 ft. (42.7 m)
3| 52 ft. (15.8 m)| 135 ft. (41.1 m)
4| 46 ft. (14.0 m)| 130 ft. (39.6 m)
5| 40 ft. (12.2 m)| 125 ft. (38.1 m)
6| 34 ft. (10.4 m)| 120 ft. (36.6 m)
Equivalent Ft. of Elbows
| 2″ Pipe| 3″ Pipe
90° Elbow| 6 ft (1.83 m)| 5 ft (1.52 m)
45° Elbow| 3 ft. (0.9 m)| 2.5 ft. (0.75 m)
Min. Vent Length Straight Pipe
Number of 90° Elbows| Min. Length 2″
3″ pipe
1| 1.0 ft (0.3 m)
COMMON VENTING
# of Water Heaters| 3″ Common Vent
2| 60 ft.
SINGLE UNIT:
Max. Flex Venting
Max Length 2″ flex vent
50 ft.
Dimensions
TOP VIEW
BOTTOM VIEW
Hanging bracket, bird screens, LP gas conversion kit are included with water heater.
Parts and Accessories
For more information on Tankless parts and accessories, see the Parts and Accessories Catalog or call 866-720-2076.