Heavy Duty Gas Outdoor A631275

Commercial Storage Gas

Model Number: Heavy Duty Gas Outdoor A631275

Rheem Heavy Duty Gas water heaters have been designed to supply large quantities of hot water. The cylinder is protected by multiple anodes and a double layer of vitreous enamel.

  • Designed for greater protection
  • Adjustable thermostats
  • Equa-Flow® system allows for flexibility in installation

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DIMENSIONS AND TECHNICAL DATA TABLE - OUTDOOR MODEL
Storage Capacity   litres 275
Dimensions      
  A mm 1865
  B mm 640
  C mm 780
  D mm 760
  E mm 700
  F mm 340
  G mm 1695
  H degrees 36
  K mm 722
  L mm 320
  M mm -
  P mm 320
Weight - Empty   kg 197
Inlet/Outlet Connections (BSPF)     RP1¼/32
Gas Connection (BSPF)     RP¾/20
T&PR Valve Connection (BSPF)     RP¾/20
T&PR Valve Setting   kPa 1000
Expansion Control Valve (ECV)10 Setting   kPa 850
without ECV10 fitted   kPa 800
with ECV10 fitted   kPa 680
Max. Thermostat Setting   °C 82
Factory Thermostat Setting   °C 70
Min. Thermostat Setting   °C 60
Manifold - Min. Centre to Centre   mm 890
Electrical Connection     2m 10A Plug and Lead
Electrical Rating 240V 50Hz     250 Watts
      1.1 Amps

PERFORMANCE DATA
No. of Units
in Parallel
Initial Storage
Capacity
Thermal Input Litres hot water at 50°C rise over peak period (based on natural gas)
  (Litres) (MJ/h) 1 hour 2 hours 3 hours 4 hours 6 hours 8 hours
1 275 200 970 1710 2460 3200 4690 6180
2 550 400 1930 3420 4910 6400 9380 12370
3 825 600 2900 5130 7370 9600 14080 18550
4 1100 800 3860 6840 9820 12810 18770 24730
5 1375 1000 4830 8550 12280 16010 23460 30910
6 1650 1200 5790 10260 14740 19210 28150 37100
No. of Units in Parallel Initial Storage Capacity Thermal Input Litres hot water at 65°C rise over peak period (based on natural gas)
  (Litres) (MJ/h) 1 hour 2 hours 3 hours 4 hours 6 hours 8 hours
1 275 200 790 1370 1940 2510 3660 4810
2 550 400 1590 2730 3880 5030 7320 9610
3 825 600 2380 4100 5820 7540 10980 14420
4 1100 800 3170 5470 7760 10050 14640 19230
5 1375 1000 3970 6830 9700 12570 18300 24030
6 1650 1200 4760 8200 11640 15080 21960 28840

Operations at temperatures above 80°C

Rheem commercial gas models 621 265, 631 265, 621 275, 631 275 are designed to operate at temperatures up to 82°C for sanitising and other applications.

Where the water supplied by the water heater is required consistently at any temperature above 80°C, we strongly recommend you use a pumped recirculation system. (Please refer to the Equa-Flow® section.)

Gas pipe supply

The gas supply piping should be sized in accordance with AS/NZS 5601.1

The gas supply pipe must be sized so that the minimum gas pressure is available at the inlet to each water heater when all appliances are operating at maximum gas consumption.

The minimum gas pressures are 1.13 kPa for natural and SNG, 2.75 kPa for propane and butane and 0.75 kPa for town gas and TLP.

TECHNICAL GAS PERFORMANCE DETAILS
Gas Type   Nat/SNG Propane Butane
Thermal Input MJ/h 200 190 160
Output kW 43.3 41.2 34.7
Min. Gas Supply Pressure kPa 1.13 2.75 2.75
Test Point Pressure kPa 0.90 2.65 2.65
Max. Gas Supply Pressure kPa 3.5 3.5 3.5
Litres Recovery Per Hour at Rise of 20°C 1870 1780 1500
  30°C 1250 1190 1000
  40°C 940 890 750
  50°C 750 710 600
  60°C 630 600 500
  65°C 580 550 460
  70°C 540 510 430
  75°C 500 480 400

Approximate daily energy consumption

These daily gas consumption figures are approximate. They’re based on:

  • A daily usage of hot water per water heater in litres, at 50°C rise
  • Using natural gas, but they can be used with reasonable accuracy for other gas types
  • Mains pressure supply systems only

The figures do not allow for pipe heat losses. An additional allowance must be made for large manifold systems and installations designed with a circulated flow and return system.

Use the table to calculate

  • The approximate energy cost for a particular installation
  • The average daily hot water consumption when the energy consumption is known
APPROXIMATE DAILY ENERGY CONSUMPTION
Daily Hot Water Usage @ 50°C Temp Rise Energy Content of Hot Water Approximate Energy Used Per Day Natural Gas
(Litres) (MJ) (MJ)
0 0 50.7
50 10.5 64.0
100 20.9 77.3
150 31.4 90.7
200 41.9 104.0
250 52.3 117.3
300 62.8 130.7
350 73.3 144.0
400 83.7 157.3
450 94.2 170.6
500 104.7 184.0
600 125.6 210.6
700 146.5 237.3
800 167.4 264.0
900 188.4 290.6
1000 209.3 317.3
1250 261.6 383.9
1500 314 450.6
1750 366.3 517.3
2000 418.6 583.9
2500 523.3 717.2
3000 627.9 850.5
3500 732.6 983.9
4000 837.2 1117.2
5000 1046.5 1383.8

To convert to kg of Propane, divide MJ by 49.5. To convert to litres of Propane, divide MJ by 25.3.

Solve several problems with room sealed fluing

The Rheem model 631 275 can be installed inside a plant room as part of a room sealed installation, using the Rheem Room Sealed Balanced Flue kit, P/No 299135.

This is the ideal solution for a difficult installation, because it solves several problems.

You don’t need to worry about ventilation into the plant room, or the need for fan assistance when discharging flue products horizontally.

Nor do you need to run a flue to a satisfactory vertical discharge point (usually at the top of the building).

The Room Sealed Kit is designed to enable flue products to be discharged up to 3 metres total flue discharge length from the water heater. It can incorporate up to 3 x 90° bends.

Interconnecting nominal 150mm inlet air and flue ducting should be supplied by the installing plumber.

The kit includes transition pieces, which are designed to accept twin skin flue tubes.

The Room Sealed Balanced Flue kit can be fully installed from within the plant room.

It’s suitable for walls up to a maximum thickness of 300mm, and it reuses the balanced flue from the water heater by relocating it on the external wall of the plant room.

A minimum plant room height of 2400mm is required, and the minimum clearances required for balanced flue terminals (as stated in AS/NZS 5601.1) must be observed.

This includes a minimum of 300mm between balanced flue terminals for this model.

Power Flue and Remote control

Rheem commercial models 621 265, 631 265, 621 275, 631 275 may be controlled by a remote device such as a time clock, remote isolating switch, pressure switch or sail switch. Additionally, Rheem can assist with Power Flue design solutions for Rheem and Raypak® commercial gas water heaters. For further details please contact your local Rheem technical advisory service.

Technical Documents

Performance Calculator View Online
Sample Specification View Online
Manifolding View Online
Room Seal Kit View Online
Product Drawings - 1 Unit Download
Product Drawings - 2 Units Download
Product Drawings - 3 Units Download
Product Drawings - 4 Units Download
Product Drawings - 5 Units Download
Product Drawings - 6 Units Download
Product Drawings - 7 Units Download
Product Drawings - 8 Units Download
Installation Instructions Download
Brochure Download