RUUD RUTGH-S Tankless Water Heaters Installation Guide

: June 4, 2024
: RUUD

Table of Contents

RUUD RUTGH-S Tankless Water Heaters
Easy Installation
Ready for Retrofits
Key Features
Specifications
Water Heater Flow Rate Curves
Venting
Dimensions
- TOP VIEW
- BOTTOM VIEW
Parts & Accessories
Documents / Resources

RUUD RUTGH-S Tankless Water Heaters

RUUD RUTGH-S Tankless Water Heaters product

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)
Approved for installations in Manufactured Home (Mobile Home) environments

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 –Ruud® Exclusive!
Built-in Recirculation pump for instant hot water at the tap (SR models)
Built-in Eco Net® wifi capability for direct control from your device (optional for S models)

Specifications

Ruud Model Number| RUTGH-S84i RUTGH-SR84i| RUTGH-S10i RUTGH- SR10i| RUTGH-S11i RUTGH-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 (Outdoor Conversion Kit sold separately: RTGH- SX)
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| RUTGH-S| RUTGH-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| Sched. 40 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 (SR Models)

Pipe Diameter| Max. Recirculation Loop
3/4″| 400 ft.
1/2″| 100 ft.

RUUD RUTGH-S Tankless Water Heaters 04 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.