Wiring Brochure

© 2008 W 325 - 12/08 10 of 12
Testing the Zone Group Pump C Output Terminals 89, 90
1. Remove the front cover from the control.
2. Use an electrical test meter to measure the (ac) voltage
between the Zone Group Pump C terminals (89, 90).
•
• When the Zone Group Pump C light is off, the reading
should be 0 V (ac) and the pump should be off.
•
• When the Zone Group Pump C light is on, the reading
should be 115 V (ac) + / – 10% and the pump should be
running.
Note: If the pump does not operate properly, refer to
any troubleshooting information supplied by the pump
manufacturer.
Testing the Zone Valve Outputs Terminals 77-88
1. Remove the front cover from the control.
2. Use an electrical test meter to measure the (ac) voltage
between the C and the Vlv terminals for each zone valve
output.
•
• When the Zone light is off, the reading should be 0 V (ac)
and the valve should be closed.
•
• When the Zone light is on, the reading should be
24 V (ac) + / – 10% and the valve should be open.
3. If power is not present:
•
• Check the power supply to the Zone Manager and the
field replaceable fuse for the transformer on the Zone
Expansion Module.
•
• If the power light is amber instead of green the transformer
fuse is blown. Determine the cause of the failure before
replacing the fuse.
Note: If the zone valve does not operate properly, refer
to any troubleshooting information supplied by the zone
valve manufacturer.