Whirlpool EDP/EDN warranty Multiple Zones with Circulators and Room Thermostats

Page 14 LAARS HEATING SYSTEMS

4.Multi zone/Multi-relay-circulator Installations: Multiple circulators must not exceed 5 amps total when connected to blue wire (see Figure 24).

NOTE: On zone valve systems such as Taco, Automag and others which do not have isolated (dry) contact end switches, a single pole isolating relay must be utilized (see Figure 23).

NOTE: This wiring is NOT the same as shown by valve manufacturer.

Figure 23. Multiple Zones with Three Wire Zone Valves (Requires Isolation Relay).

Figure 24. Multiple Zones with Circulators and Room Thermostats.

NOTE: This wiring required only for single zone applications utilizing clock thermostats requiring 24 volt power supply.

Figure 25. Wiring for Single Zone Power Stealing Type Clock Thermostats That Require 24 VAC.