TFC Group Towerchron QE2 - Manual (Page 46)

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The following wiring diagrams are schematic only (for clarity the earth and neutral connections are omitted). We sug-
gest when wiring systems, a suitable wiring centre is used (the Tower controls wiring centre is purpose made and
gives full information for wiring this programmer into compatible equipment).
Gravity Hot Water/Pumped Heating System Two Port Valve in D.H.W. with Room and Cylinder Stats
Note: Only valves with “change over” switches are suitable