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628 & 698 Models
11. Disconnect the heater power block, carefully remove
the tie wrap (with cutters) and remove the Tank.
12. Before fitting the new Hot Tank, ensure the Heater
Element is securely fitted (as shown) and
depending on the replacement Hot Tank type,
either with one or two of the external sensors. (On
the Thermistor Probe Tank, the single reset type
Overheat cut-out is fitted to the bottom position).
13. Reconnect the heater power block, fitting a new tie
wrap as necessary. Reconnect the spade terminals
onto the external sensors as follows:
Top Sensor
Single large white wire and pair of large
white/small white wire.
Bottom Sensor
Pair of large red/ small red wire and pair of large
white wires.
14. Carefully reconnect the silicone rubber pipes, connecting as fully as possible. Connect new thermistor probe /
cover cap to side of Tank as applicable.
15. Secure new Tank in position with two bolts.
16. Check all pipes and wiring is connected before turning water on again.
17. Refit front panel, engaging with top hinge pin of Door Panel and Top Cover.
18. Wait until water can be dispensed from both taps before switching heating and cooling circuits on.
In the event of any queries, please call our Technical Helpline on 01362 656927
62
Top sensor
Top bolt
Bottom sensor
Bottom bolt
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