REMEHA 1000 Indirect, Installation Manual

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Remove the 8 nuts and withdraw the immersion heater. Take care when lifting the immersion heater out of the cylinder and work within
safe working practices.
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Carefully remove any scale from the surface of the immersion.
CAUTION
DO NOT use a sharp implement as damage to the element surface could be caused.
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Ensure sealing surfaces are clean and seals are undamaged, if in doubt fit a new gasket. (spare part number 95611025)
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Replace immersion heater(s) and make sure the 8 nuts are correctly torqued (20Nm or 14.75 ft/lbf)
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Rewire, check, close and secure immersion heater housing cover(s).
Expansion vessel charge pressure
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Remove the dust cap on top of the vessel.
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De-pressurise the system by turning the mains supply off and then opening a hot tap.
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Check the charge pressure using a tyre pressure gauge. The pressure must be set in accordance with the inlet pressure set on the pressure
reducing valve.
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If it is lower than the required setting it should be recharged using a tyre pump (Schrader valve type).
CAUTION
DO NOT OVER-
CHARGE
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Re-check the pressure and when correct replace the dust cap.
Re-commissioning
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Check all electrical and plumbing connections are secure. Close the drain cock.
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With a hot tap open, turn on the cold water supply and allow unit to refill.
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DO NOT switch on the immersion heater(s) or boiler until the unit is full of water.
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When water flows from the hot tap, allow it to flow for a short while to purge air and flush through any disturbed particles.
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Close hot tap and then open successive hot taps in system to purge any air.
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When completely full and purged check system for leaks.
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The heating source (immersion heater(s) or boiler) can then be switched on.
10. Troubleshooting