RUUD G75-125 Universal Water Heater Instruction Manual

RUUD G75-125 Universal Water Heater

Product Information

The product is a commercial water heater designed to fit into tight retrofit applications. It comes in capacities ranging from 35 to 100 gallons. The water heater is manufactured by Ruud and can be found at Ruud.com/CommercialWaterHeating. It features a space-saving design and multiple connections for easier replacement, installation, and maintenance. The compact size and multiple water connections of the Universal water heater make installations in commercial retrofits simpler.

Product Specifications
Here are the specifications for the Universal water heater:

• Recovery Capacities: The recovery capacities vary depending on the model.
• Dimensional Information: The dimensions are provided in inches.
• Water Connections: The water connections are listed for top, front, and rear sides.
• Approx. Ship. Weight: The approximate shipping weight is provided in pounds.
• Model Number: The model number is listed for each capacity.
• Input (BTU/H): The input rating in BTU per hour for natural gas and LP (liquid propane) is provided.
• Thermal Eff.: The thermal efficiency is listed as 80% for all models.
• Standby Loss (BTU/H): The standby loss in BTU per hour is provided for each model.

Product Usage Instructions

To replace or install the Universal water heater, follow these steps:

1. Ensure that the water heater is suitable for your retrofit application in terms of capacity and dimensions.
2. Prepare the installation location, ensuring proper ventilation and access to the necessary water connections.
3. Carefully position the water heater in the desired location, taking note of the top, front, and rear water connections.
4. Connect the water supply pipes to the appropriate water connections on the water heater.
5. Connect the gas or LP supply line to the water heater, following the manufacturer’s instructions and local codes.
6. Ensure all connections are secure and leak-free.
7. Provide a 120V power source with 0.3 amps for the water heater to operate.
8. Perform a quick inspection to verify proper installation and functionality.

Note: For LP models, use a 3/4-inch gas supply line. Increase the height by 3-5/8 inches for NSF models. All models require a 120V power source with 0.3 amps.
For usage and delivery information, refer to the maximum delivery chart provided in the user manual.

RUUD® UNIVERSAL™
SPACE-SAVING DESIGN AND MULTIPLE CONNECTIONS FOR EASIER REPLACEMENT, INSTALLATION, AND MAINTENANCE
The tighter the commercial retrofit, the more you will appreciate how the Universal’s compact size and multiple water connections simplify installations.

Easy Replacement and Installation

• Low profile automatic flue damper to help minimize overall height
• Top, front and rear inlet and outlet connections
• Easy side venting when combined with our AGA-certified power vent kits
• Smaller jacket diameters
• Shorter floor-to-vent heights

Easier Maintenance

• Hand-hole cleanout for removal of sediment deposits
• Full port, full flow brass drain valve.
• System Sentinel™ diagnostics allow you to quickly verify system operation sequence by sequence.
• Stainless steel burner assembly that slides out like a drawer for quick inspection

1. Universal’s short height and narrow jacket diameters, plus top, front and rear water inlets/outlets offer the ultimate in installation flexibility.
2. Conventional water heaters are always wider and usually taller than the Universal. That makes them more difficult to handle, install and service.

Universal Specifications

RECOVERY CAPACITIES| DIMENSIONAL INFORMATION (shown in inches)| WATER CONNECTIONS| APPROX. SHIP. WT.
---|---|---|---
MODEL NUMBER| INPUT (BTU/H) NAT. & LP| | Temp. Rise – GPH| A| B| C| D| E| F| G| H| TOP IN/ OUT| FRONT SIDE| REAR SIDE| STD. (LBS.)| ASME (LBS.)
THERMAL EFF.| STANDBY LOSS (BTU/H)| 40°F| 100°F| 140°F
G75-125| 125,000| 80%| 1108.8| 303| 121| 87| 65-1/2| 61| 26-1/4| 25| 5| 56| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 480| N/A
G82-156| 156,000| 80%| 1190.0| 378| 151| 108| 68-13/16| 64| 26-1/4| 25| 6| 58-5/8| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 480| N/A
G76-180| 180,000| 80%| 1183.9| 436| 175| 125| 68-13/16| 64| 26-1/4| 25| 6| 58-5/8| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 540| N/A
G37-200*| 199,900| 80%| 900.0| 485| 194| 138| 49-1/4| 43-3/8| 26-1/4| 25| 6| 37-5/8| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 405| N/A
G76-200-1| 199,900| 80%| 1208.8| 485| 194| 138| 68-13/16| 64| 26-1/4| 25| 6| 58-5/8| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 540| N/A
G91-200| 199,900| 80%| 1299.0| 485| 194| 138| 76-13/16| 71-13/16| 26-1/4| 30-5/8| 6| 66-3/8| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 600| N/A
G100-200(A)| 199,900| 80%| 1349.8| 485| 194| 138| 73-1/16| 66-1/8| 30-1/4| 23-1/4| 6| 57-1/2| 3/4| 23| 1-1/2| 2| 2| 780| 835
G72-250(A)| 250,000| 80%| 1245.8| 606| 242| 173| 71-1/16| 64-1/2| 26-1/4| 25| 6| 58-5/8| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 590| 630
G100-250(A)| 250,000| 80%| 1412.5| 606| 242| 173| 73-1/4| 66-1/8| 30-1/4| 23-1/4| 8| 57-1/2| 3/4| 23| 1-1/2| 2| 2| 795| 835
G100-270(A)| 270,000| 80%| 1437.5| 655| 262| 187| 73-7/8| 66-1/8| 30-1/4| 23-1/4| 8| 57-1/2| 3/4| 23| 1-1/2| 2| 2| 805| 845
G72-300(A)| 300,000| 80%| 1308.0| 727| 291| 208| 71| 64-1/8| 26-1/4| 25| 8| 58-5/8| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 590| 630
G100-310(A)| 310,000| 80%| 1487.5| 752| 301| 215| 75| 68-1/2| 30-1/4| 32-1/4| 7| 61-3/4| 3/4| 23| 1-1/2| 2| 2| 770| 810
G65-360(A)| 360,000| 80%| 1003.0| 873| 349| 249| 70-11/16| 64-1/2| 26-1/4| 25| 8| 58-5/8| 3/4| N/A| N/A| 1-1/2| 1-1/2| 640| 680
G65-400(A)| 399,900| 80%| 1386.0| 969| 388| 277| 70-11/16| 64-1/2| 26-1/4| 25| 8| 58-5/8| 3/4| N/A| N/A| 1-1/2| 1-1/2| 640| 680
G85-400(A)| 399,900| 80%| 1514.0| 969| 388| 277| 78-13/16| 72-5/16| 26-1/4| 20-5/8| 10| 66-3/8| 3/4| 20| 1-1/2| 1-1/2| 1-1/2| 640| 680
G100-400(A)| 399,900| 80%| 1599.0| 969| 388| 277| 76| 68-1/2| 30-1/4| 32-1/4| 8| 61-3/4| 1**| 23| 1-1/2| 2| 2| 770| 810

• *Automatic circulating tank water heater. Recovery ratings are based on thermal efficiencies obtained in a CSA certified laboratory. **3/4 for LP Models. Increase Height 3-5/8 for NSF Models.
• Recovery ratings are based on thermal efficiencies obtained in a CSA certified laboratory. All models require a 120V power source/0.3 amps. (A) indicates available ASME model.

MAXIMUM DELIVERY (in gallons) (Includes useable storage and recovery for indicated times)

MODEL NUMBER| TANK CAP.| INPUT (BTU/H) NAT. & LP| AT 100°F TEMP RISE
10 MIN.| 20 MIN.| 30 MIN.| 45 MIN.| 60 MIN.| 120 MIN.| 180 MIN.| MIN. TO REC. CONTENTS
G75-125| 75| 125,000| 73| 93| 113| 143| 174| 295| 416| 37
G82-156| 82| 156,000| 83| 108| 133| 171| 209| 360| 511| 33
G76-180| 76| 180,000| 82| 111| 140| 184| 228| 402| 577| 26
G37-200*| 35| 199,900| 56| 88| 119| 167| 214| 403| 562| 11
G76-200-1| 76| 199,900| 86| 118| 150| 199| 247| 441| 635| 24
G91-200| 91| 199,900| 96| 128| 161| 209| 258| 451| 645| 28
G100-200(A)| 100| 199,900| 102| 135| 167| 215| 264| 458| 652| 31
G72-250(A)| 72| 250,000| 91| 131| 172| 232| 293| 535| 778| 18
G100-250(A)| 100| 250,000| 110| 151| 191| 252| 312| 555| 797| 25
G100-270(A)| 100| 270,000| 114| 157| 201| 266| 332| 594| 855| 23
G72-300(A)| 72| 300,000| 99| 147| 196| 269| 341| 632| 923| 15
G100-310(A)| 100| 310,000| 120| 170| 220| 295| 371| 671| 972| 20
G65-360(A)| 65| 360,000| 104| 162| 220| 307| 395| 744| 1093| 11
G65-400(A)| 65| 399,900| 110| 175| 239| 336| 433| 821| 1209| 10
G85-400(A)| 85| 399,900| 124| 189| 253| 350| 447| 835| 1223| 13
G100-400(A)| 100| 399,900| 135| 199| 264| 361| 458| 846| 1233| 15

• *Automatic circulating tank water heater.

CLEARANCE TO COMBUSTIBLES

MODEL NUMBER| SIDE| REAR| TOP
G75-125| 2| 2| 12
G82-156| 2| 2| 12
G76-180| 2| 2| 12
G37-200*| 2| 2| 12
G76-200-1| 2| 2| 12
G91-200| 2| 2| 12
G100-200(A)| 2| 4| 12
G72-250(A)| 6| 6| 12
G100-250(A)| 2| 4| 12
G100-270(A)| 2| 4| 12
G72-300(A)| 6| 6| 12
G100-310(A)| 6| 6| 12
G65-360(A)| 6| 6| 12
G65-400(A)| 6| 6| 12
G85-400(A)| 6| 6| 12
G100-400(A)| 6| 6| 12

Allow a minimum of 18” front clearance for servicing.

Warranty

3-Year limited tank warranty, upgradeable to 5 years

Certification and Ratings
EFFICIENCY All models tested according to ANSI test procedures, and meet or exceed the thermal efficiency and standby loss requirements of ASHRAE standard (EPact). Also exceeds energy efficiency codes of all states including California Energy Commission (CEC).

Safety and Construction

These products are design certified by the CSA:

1. For operation at 180°F.
2. To meet all safety and construction requirements of ANSI Z21.10.3.
3. As an automatic storage or instantaneous water heater.
4. As an automatic circulating tank water heater.
5. For operation on combustible floors and in alcove installations. All models are North Carolina Code compliant.

Certified for a 150 PSI Maximum Working Pressure (160 PSI for ASME Models)

Optional Constructions
ASME construction is available on designated models. UL Sanitation (NSF5) compliant models are available when equipped with optional leg kit. (Part No. AM35450)

Contact Us

• Customer Service, Warranty, Parts 800.621.5622
• Plumbing Support Team 866.339.2388
• Technical Service 800.HEATER3 (800.432.8373)
• Visit us online at Ruud.com/CommercialWaterHeating

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
PRINTED IN U.S.A. • 08/23 • WP • RU-RR140

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