Install Instructions
PI-PR-561147 0312 (Diverting Valve) 8 of 9
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Product
Instructions
NOTES: Wiring
1. This drawing shows system wiring concept only installer is responsible for all equipment & detailing required by local codes.
2. All wiring shall be in conformance with the latest edition of the National Electrical Code.
3. Maximum current rating of Basic and Advance Heating Control Relay is 10 Amps, Basic and Advance Snow Melting Control
Relay is 5 Amps, Maximum current rating of Zone Control Relays is 5 Amps, if circulator draw exceeds this use pilot relay with
120 VAC coil operated by Viega Control.
4. Consult with control / boiler manufacturer for limitations and installation instructions
5. Do not run the wires parallel to telephone or power cables. If the sensor wires are located in an area with strong source of
electromagnetic interference (EMI), shielded cable or twisted pair should be used or the wires can be run in a grounded metal
conduit. If using shielded cable, the shield wire should be connected to the Com or Com Sen terminal on the control and not
to earth ground. Use 18 AWG copper wiring for all sensor wiring. Sensors should be located 12" down stream of mixing point.
6. DHW priority relay must be rated to handle full amperage load of zone circulator relay center.
7. Other congurations are possible, but all space heating zone circulators must turn off when DHW mode is on or heat source
needs to be sized for multiple loads.
Wiring Schematic of Basic Snow Melt Control with Non-Electric Control