Slant/Fin HWT-40 Installation And Operating Instructions Manual page 11

INDIRECT FIRED WATER TANK
V WIRING (cont'd)
COLD START BOILER APPLICATION - PRIORITY FIGURE 4
TACO SR504 & SR506
SWITCHING RELAYS
24 VAC
POWER
FUSE 1 AMP
TO: "TT" ON BOILER
Operation: When any thermostat calls for heat, the
appropriate circulator is energized and the isolated
end switch (X and X) will start the boiler.
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.
THERMOSTAT
ZONE 1
SR 506
120 V RELAY
ZONE 1
X X
ZC ZR
END SWITCH
JUMPER
I
T
ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
SIX ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
120 VOLT CIRCULATORS
INDIRECT
TANK
CIRCULATOR
Jumper Placement: The jumper should be placed
between terminals ZC and ZR. Connect the
isolated end switch to the aquastat control on the
boiler.
Power Input: Connect 120 volt as power input to
terminals N and H. Neutral wire to terminal N. Hot
wire to terminal H.
INDIRECT TANK
TEMP CONTROL
ZONE 6
PRIORITY
ON
OFF
POWER
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 5
ZONE 6
POWER
INPUT
120 VAC OUTPUT
11