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Wiring installation instruction (QM2)
Gravity Hot Water / Pumped Heating - System with Room Stat to Control Pump
The following wiring diagrams are schematic only (for clarity the earth and neutral connections are
omitted)� We suggest 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 systems using
compatible equipment)�
TOWERCHRON QM2
EARTH
NEUTRAL
LINE
BOILER
ROOMSTAT
PUMP
EARTH
NEUTRAL
COMMON
DEMAND
SWITCHED LIVE
REFER TO BOILER
MANUFACTURER
INSTRUCTIONS
EARTH
NEUTRAL
LINE
N L 1 2 3 4
N
N
• With the above system, the following
combination can not be selected on the slide
switches:
– Heating TIMED, hot water off
– Heating CONST, hot water off
– Heating CONST, hot water timed
• Fully pumped systems
– Remove red pin (see applications
TOWERCHRON QM2)
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