External Accessories; Testing The Electrical Connections - Glow-worm Ultracom2 sxi Installation And Servicing

INSTALLATION
11.4

External accessories

Under no circumstances must any mains voltage
e
be applied to any of the terminals on the 24v
connection plug.
2
1
Key
1 24V room thermostat connector
2 Ebus room thermostat connector or Ebus radio receiver/Smart
wiring centre
3 Outdoor sensor connector
4 Overheating safety connector for heating floor
• Fit external controls in accordance with the rules in force.
• When installing a non eBus controller, the link fitted to the
24V terminals (RT/24V) must be removed.
11.5

Testing the electrical connections

Carry out preliminary electrical system checks as below:
• Resistance to earth (<1 Ohm)
• Short circuit test (L-N)
• Resistance to earth (L-E)
• Polarity check
- 22 -
24 V BUS
RT 24V T° ext
X17
BUS
X18
4
3
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