HJ Cooper Stainless Steel Mains Pressure Hot Water Cylinders

HJ Cooper by Rinnai stainless steel mains pressure hot water cylinders are constructed from high grade duplex stainless steel and packed with features to benefit specifiers, installers and homeowners, making them exceptional value for money.

HJ Cooper Stainless Steel Mains Pressure Hot Water Cylinders

Peace of mind
This range of mains pressure electric hot water cylinders comes with a 20 year limited warranty on the inner cylinder*. You won't find a longer warranty on any other electric hot water cylinder in New Zealand! Whats more, it's backed by Rinnai after sales support.

Energy efficient
• Curved element design ensures 98% of water is heated.
• Cold water inlet dip tubes deliver water to the bottom of the tank to avoid mixing of water
• No cylinder wraps required, all HJ Cooper cylinders meet NZ MEPS

MEPS = Minimum Energy Performance Standard
 
Future proof your home
Connect to a hot water heat pump or solar system with the extra eco inlet connection**, either now or in the future.

Install as a low pressure system then connect, without replacing your cylinder, to the luxury of mains pressure when you are ready.

Convenience
• Lightweight, stainless steel makes transport and installation are a breeze
• Low maintenance, no sacrificial anode to maintain
• Future proofed, auto reset thermostat option means these cylinders can be solar and hot water heat pump ready

Innovative design
The 250 and 300 L cylinders have the option of a second element making recovery times quicker and making it less likely you'll run out of hot water.

* Please see the owner and installer guide, in the 'Technical' tab, for full warranty details
** Excludes 135 L cylinder
 

Suitable for:
• Indoor installations
• Mains and low pressure systems
• Domestic and commercial water heating applications
• Left or right hand plumbing connections
• Connection to open loop solar or hot water heat pump systems

Not suitable as a pool or spa heater.

Water quality
HJ Cooper water heaters are manufactured to suit most New Zealand council water supplies. However some water supplies can have a detrimental effect on the water heater, its operation and life expectancy.

Water supplies with a high level of calcium carbonate (hard water) can cause scaling on hot surfaces. We recommend a water temperature of no more than 65 °C to minimise scale build-up. Scale reducing or water softening devices should be considered in hard water areas. The unit is not guaranteed against damage due to scaling. 
 

HJ Cooper Stainless Steel Mains Pressure Hot Water Cylinders

HJ Cooper Stainless Steel Mains Pressure Hot Water Cylinders

HJ Cooper Stainless Steel Mains Pressure Hot Water Cylinders

 
N/A
View product details

HJ Cooper Copper Low Pressure Hot Water Cylinders

HJ Cooper Copper Low Pressure Hot Water Cylinders

 
N/A
View product details

HJ Cooper Enamel Mains Pressure Hot Water Cylinders

HJ Cooper Enamel Mains Pressure Hot Water Cylinders

 
N/A
View product details

Rinnai INFINITY® VT24 External (REU-VR2426WG)

Rinnai INFINITY® VT24 External

42.1 kW
6 stars 
RRP $1699.00
View product details

Type: Internal

Sizes: 135, 180, 250, 300

Max pressure: 850 kPa

kW: 2 or 3kW

Curved element: Yes

Wetback Option: No

Solar Enable: Yes

Heat pump ready: Yes

Warranty: Limited 20 years

Type: Internal

Sizes: 9, 14, 22, 44, 90, 135, 180, 225

Max pressure: 76kPa

kW: .1.5, 2 or 3kW

Curved element: No

Wetback Option: Yes

Solar Enabled: No

Heat pump ready: No

Warranty: 5 Years

Type: Internal

Sizes: 30, 50, 90, 135,180, 250, 300

Max pressure: 850 kPa

kW: 1.5, 2 or 3kW

Curved element: Yes

Wetback Option: No

Solar Enabled: No

Heat pump ready: Yes

Warranty: 5 Years

Type: External only

Sizes: 16L - 26L

Max star rating: 6.2

Efficiency: 80%

Savings over electric on NG: 50%

Savings over electric on LPG: 15%

Warranty: 10 years pro rata on heat exch, 3 years parts


 

Models and capacities MS13555020 = 135 L (2 kW)
MS13555030 = 135 L (3 kW)
MS18055020 = 180 L (2 kW)
MS18055030 = 180 L (3 kW)
MS25055020 = 250 L (2 kW)
MS25055030 = 250 L (3 kW)
MS30055020 = 300 L (2 kW)
MS30055030 = 300 L (3 kW)
Within the range there are different element sizes and configurations, and thermostat options. For further details refer to the 'Mains Pressure Premium - Duplex Stainless Steel' section in the Storage Hot Water Pocket Guide.
Anode Not required
Connections Hot and cold water connections ¾ " (20 mm)
Construction Inner cylinder: High grade duplex stainless steel (refer note below)
Outer casing: Galvanised steel
Element Incoloy 825 alloy sheath element positioned at the bottom of the tank.
• 135 L: 2 or 3 kW
• 180 L: 2 or 3 kW
• 250 L: 2 or 3 kW*
• 300 L: 2 or 3 kW*
* Twin element options available
Maximum working pressure 850 kPa
Pressure testing To 15 bar
Thermal insulation CFC-free polyurethane foam, compliant with MEPS standard
Thermostat Robert Shaw 30 A contact thermostat, manually resettable at 85 °C. Thermostat can be upgraded to an auto-reset thermostat for solar and hot water heat pump applications.
TPR valve Rating of TPR supplied with cylinder—
factory set to 850 kPa and 90 °C.
Weight empty (approx.) 135 L = 29 kg
180 L = 35 kg
250 L = 45 kg
300 L = 53 kg
Cylinder recovery times (theoretical)

Based on a thermostat temp. setting of 60 °C and an incoming water temp. of 15 °C.
135 L

3 hrs 32 mins (2 kW), 2 hrs 22 mins (3 kW)
180 L

4 hrs 44 mins (2 kW), 3 hrs 9 mins (3 kW)
250 L

6 hrs 34 mins (2 kW), 4 hrs 23 mins (3 kW)

3 hrs 17 mins (2 x 2 kW), 2 hrs 11 mins (2 x 3 kW)
300 L

7 hrs 53 mins (2 kW), 5 hrs 15 mins (3 kW)

3 hrs 56 mins (2 x 2 kW), 2 hrs 39 mins (2 x 3 kW)
General properties of duplex stainless steel 2304
Duplex 2304 is a 23% chromium, 4% nickel, molybdenum-free duplex stainless steel whose structure is a balance of ferritic and austenitic. It has general corrosion resistance similar or better than Alloys 304L and 316L but with yield strength nearly double that of austenitic stainless steels. Its duplex microstructure and low nickel and high chromium contents also allows Duplex 2304 to demonstrate improved stress corrosion resistant properties compared to 304 and 316. It is typically suitable for all applications in the -58 °F to 572 °F
(-50 °C to 300 °C) temperature range and is designed to feature high mechanical strength, good weldability, good corrosion resistance, high resistance to stress corrosion cracking, good machinability, low thermal expansion, good fatigue properties, high thermal conductivity, and easy fabrication.
[source: http://www.pennstainless.com/stainless-grades/duplex-grades/duplex2304-stainless-steel/]
  A (mm) B (mm) C (mm) D (mm) E (mm) Height (mm) Diam. (mm)
135 L 310 N/A 325 N/A 690 1023 ø 550
180 L 310 460 325 N/A 970 1295 ø 550
250 L 310 460 325 1080 1410 1730 ø 550
300 L 310 460 325 1380 1725 2047 ø 550

PDF Owner and installer guide PDF SDoC & Certificate of Approval PDF Mains pressure retrofit thermostat kit installation PDF Spares

Compare this...

Compare this

... to other great products

Gas Hot Water

*Gas* Hot Water

Save 50% over electric with Infinity VT*

Get Rinnai INFINITY ® VT Gas Hot Water at home.


*15% in areas using LPG

Enquire about a product

We’re happy to help with anything, big or small. Please fill out the short form below and we’ll get back to you within 24 hours.

Please enter your name Please enter your email address Please enter a subject Please enter a message

Where to Buy

Find a Rinnai reseller near you:

Or enter a postcode:

Brochures & Manuals

Fireplaces

*Fireplaces*

Water Heating

*Water* Heating

Gas Heaters

*Gas* Heaters

Fireplaces

*Fireplaces*

Gas Heaters

*Gas* Heaters

Water Heating

*Water* Heating
©Rinnai New Zealand