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  4. Raypak Hot Water
  5. Raypak Hot Water
  6. Raypak 280
Raypak Hot Water 280

Raypak Hot Water
Raypak 280

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  • Overview
  • Specifications
  • Technical Documents

Raypak® 280 is a compact and efficient heating system for large quantities of water for both hot water and hydronic applications.

  • Can be installed indoors or outdoors
  • Available with On/Off or modulating burners
  • Hot Surface Ignition (HSI) reduces operating costs
  • The On/Off type water heaters can operate as low as 41°C without any condensation or sooting
  • The efficient all-copper heat exchanger provides an outstanding 82% thermal efficiency
  • Raypak 280 delivers up to 758L recovery per hour at a 70°C rise
  • Maximum storage capacity of 3000L 
Max Storage Capacity Installation Location Weight Empty Approx Natural Gas Input Natural Gas Output
3000 Litres Indoor/Outdoor 93 kg 278 MJ/hr 62 kW
Max Storage Capacity 3000 Litres
Installation Location Indoor/Outdoor
Weight Empty Approx 93 kg
Natural Gas Input 278 MJ/hr
Natural Gas Output 62 kW

Raypak Hot Water 280

Product Specifications

Max Storage Capacity
3000 Litres
Installation Location
Indoor/Outdoor
Weight Empty Approx
93 kg
Natural Gas Input
278 MJ/hr
Natural Gas Output
62 kW
ULPG Input
261 MJ/hr
Inlet Connection
RC1½
ULPG Output
58 kW
Warranty: Parts (Parts/Labour)
1 Year
Warranty: Heat Exchanger (Parts/Labour)
5/1 Year
Dimensions H x W (includes high wind top)
2240 x 570 mm
Dimensions H x W (without high wind top)
1715 x 570 mm
Flue Connection
205 mm
Natural Gas Connection On/Off Models
RP¾
Natural Gas Connection Modulating Models
RP1
ULPG Connection - On/Off Models
RP¾
ULPG Connection - Modulating Models
RP¾
Relief Valve Connection - On/Off Models
RC¾
Relief Valve Connections - Modulating Models
RC¾
Electrical Rating 240V 50Hz
50 Watts
Electrical Rating 240v 50Hz
50 Amps
Minimum Buffer Tank Capacity
325 Litres
Natural Gas Recovery per/hr @ 30°C rise
1769 Litres
Natural Gas Recovery per/hr @ 40°C rise
1327 Litres
Natural Gas Recovery per/hr @ 50°C rise
1061 Litres
Natural Gas Recovery per/hr @ 60°C rise
844 Litres
Natural Gas Recovery per/hr @ 65°C rise
816 Litres
Natural Gas Recovery per/hr @ 70°C rise
758 Litres
Natural Gas Recovery per/hr @ 75°C rise
708 Litres
Natural Gas Recovery per/hr @ 80°C rise
663 Litres
Natural Gas Recovery per/hr @ 85C rise
624 Litres
Maximum Flow Rate Modulating (10°C Rise)
1.47 Litres/sec
Maximum Flow Rate Modulating Pressure Drop
8 kPa
Maximum Flow Rate On/Off (15°C Rise)
0.98 Litres/sec
Maximum Flow Rate On/Off Pressure Drop
4 kPa
Minimum Flow Rate (20°C Rise)
0.74 Litres/sec
Minimum Flow Rate Pressure Drop
3 kPa
Back Clearance (Combustibles)
500 mm
Front Clearance (Combustibles)
750 mm
Left Clearance (Combustibles)
600 mm
Right Clearance (Combustibles)
500 mm
Ceiling Clearance (Combustibles)
1200 mm
Back Clearance (Non-Combustibles)
150 mm
Front Clearance (Non-Combustibles)
750 mm
Left Clearance (Non-Combustibles)
600 mm
Right Clearance (Non-Combustibles)
150 mm
Ceiling Clearance (Non-Combustibles)
1200 mm
Raypak Pipe Size & Pump Selection Chart
Model Pump Branch Size (mm) Minimum Manifold Header Size Required (mm)
      1 Unit 2 Units 3 Units 4 Units
280 32-80N 32 32/3 50/3 65/3 65/3
350 32-80N 40 40/3 50/3 65/3 80/3
430 32-80N 40 40/3 65/3 65/3 80/3
538 32-80N 50 50/3 65/3 80/3 100/3
658 32-80N 50 50/3 80/3 100/3 100/3
768 40-60/2B 50 50/3 80/3 100/3 100/3
868 40-60/2B 65 65/2 100/2 100/2 125/2
972/992 40-60/2B 65 65/3 100/3 100/3 125/3
1142/1182 50-120B 65 65/1 100/1 125/1 125/1
1242/1292 50-120B 65 65/2 100/2 125/2 125/2
1362/1412 50-120B 80 80/2 100/2 125/2 150/2
1662/1722 80-120B 80 80/2 125/2 125/2 150/2
1852/1922 80-120B 100 100/3 125/3 150/3 150/3
2004/2214 80-120B 100 100/1 125/1 150/1 -
2404 80-120B 100 100/1 125/1 150/1 -
2634 80-120B 100 100/2 125/2 - -
2804/3164 80-120B 100 100/3 150/3 - -
3304 80-120B 100 100/3 150/3 - -
3694 80-120B 125 125/3 150/3 - -
3804/4224 80-120B 125 125/3 - - -

Technical Documents

Technical Document
Raypak 280A-430A Water Heater Service Instructions
1.4 MB
Raypak 200-430 Installation Guide
2.9 MB
Raypak 200-430 Water Heater Service Instructions
2.3 MB
Raypak Mechanical Installation Schematic
55 KB
Installation Schematic - One Water Heater, One Tank
76 KB
Installation Schematic - Storage Tanks
88 KB
Installation Schematic - Three Water Heaters, Three Tanks
116 KB
Revit - Raypak 280
432 KB
Commercial & Industrial Guide
18 MB
Commercial Raypak Hot Water & Heating Brochure
755 KB
Meriton Apartments Case Study
311 KB
Southern Bottling Case Study
275 KB
ICC Sydney Case Study
499 KB
Technical Document

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