DHT Techtanium TT-40 Installation & Operating Instructions Manual page 10

V WIRING (cont'd)
TANKLESS COIL BOILER APPLICATION - PRIORITY FIGURE 3a.
Operation: When any thermostat calls for
heat, the boiler is given a signal to start.
The appropriate circulator is energized
only when the boiler temperature is above
the set low limit.
Priority Operation:
switched to the priority setting and is
actuated, all
operation until zone 6 is satisfied. When
zone 6 is not switched to priority, all zones
will operate independently.
10
When zone
other zones will
Jumper Placement: REMOVE the jumper
between terminals ZC and ZR. Connect
terminal ZC to ZC terminal on the
aquastat control. Connect terminal ZR to
ZR terminal on the aquastat control.
Confirm polarity is consistent between
6 is boiler aquastat and switching relay.
stop Power Input: Connect 120 volt as power
input to terminals N and H. Neutral wire to
terminal N. Hot wire to terminal H.