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1. Check flow through the boiler and DHW tank.
2. Possible causes: radiator shut off valves closed, blocked water filter, restriction in DHW tank to high.
3. Verify proper installation of the boiler plumbing, connections and all components.
4. Ensure 3 way valve is functioning properly and is not clogged or full of pollution.
BL 12
Maximum average ΔT of supply
sensor and return sensor for hot
water is repeatedly exceeded.
Rectify Issue,
Check following
9
Operation is normally possible for the central
heating installation during the block. The pump
continues to operate at minimum capacity during
008082013GW
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