HJ Cooper Mains Pressure Enamel Indoor Cylinders

Overview

Discontinued
Discontinued late 2017, superseded by Rinnai mains pressure enamel cylinders

Offering exceptional performance and reliability. With a range of slim diameters, they are an easy replacement option for your old electric hot water cylinder. 488 mm and 590 mm diameter cylinders to match traditional NZ cylinder sizes.

Large range of sizes
30-300 L, there's an electric hot water cylinder to suit. Auto reset options for solar and hot water heat pump applications.

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Product Details

Suitable for
• Indoor installations
• Mains and low pressure systems
• Residential water heating applications only
• 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. 

Technical Specifications

Anode

High performance anode fitted

Connections

Hot and cold water connections ¾ " (20 mm)

Construction

Inner tank - enamel steel
Outer casing - galvanised steel
Insulation - CFC free polyurethane foam compliant with MEPS

Elements

Long-life Superloy 825 alloy sheathed element, incorporated into an easily removable outer plate, should replacement be necessary.

30 L 1.5 or 3 kW
50 L 1.5 or 3 kW
90 L 2 or 3 kW
135 L 2 or 3 kW
180 L Ø 488 mm 2 or 3 kW
180 L Ø 590 mm 2 or 3 kW
250 L 2 or 3 kW*
300 L 2 or 3 kW*

* twin element options available

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

TPR supplied, factory set to 850 kPa and 90 ºC

Maximum operating pressure

850 kPa

Pressure testing

To 15 bar

Weights of 488 mm diam. cylinders

135 L = 44.2 kg, 180 L = 54.5 kg

Cylinder recovery times theoretical
Cylinder 1.5 kW or 2 kW 3 kW Twin elements
30 L 1 hr 10 mins (1.5 kW) 35 mins -
50 L 1 hr 56 mins (1.5 kW) 58 mins -
90 L 2 hrs 38 mins (2 kW) 1 hr 45 mins -
135 L 3 hrs 56 mins (2 kW) 2 hrs 37 mins -
180 L 5 hrs 15 mins (2 kW) 3 hrs 30 mins  -
250 L 7 hrs 17 mins (2 kW) 4 hrs 51 mins

3 hrs 39 mins (2 x 2 kW)
2 hrs 25 mins (2 x 3 kW)

300 L 8 hrs 45 mins (2 kW) 5 hrs 50 mins 4 hrs 22 mins (2 x 2 kW)
2 hrs 55 mins (2 x 3 kW)
Discontinued

late 2017, superseded by Rinnai mains pressure enamel cylinders

Why Rinnai?

Our stylish and efficient heating and cooling solutions are designed to bring you total home comfort.

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