V Wiring - Slant/Fin HWT-40 Installation And Operating Instructions Manual

10
V WIRING (cont'd)
TANKLESS COIL BOILER APPLICATION - PRIORITY FIGURE 3
Operation: When any thermostat calls for heat, the
boiler is given a signal to start. The appropriate
circulator is energized only when the boiler temper-
ature is above the set low limit.
Priority Operation: When zone 6 is switched to
the priority setting and is actuated, all other zones
will stop operation until zone 6 is satisfied. When
zone 6 is not switched to priority, all zones will oper-
ate independently.
INDIRECT
TANK
CIRCULATOR
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 boiler aqua-
stat and switching relay.
ZO
Power Input: Connect 120 volt as power
input to terminals N and H. Neutral wire to
terminal N. Hot wire to terminal H.
ZO ZON
INDIRECT FIRED WATER TANK
INDIRECT TANK
TEMP CONTROL
I