V WIRING (cont’d)
POWER
INPUT
ZONE 1
ZC
XX
END SWITCH
ZR
120 VOLT CIRCULATORS
SIX ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
THERMOSTAT
ZONE 2ZONE 3ZONE 4 ZONE 5ZONE 6
ZONE 1
ZONE 1
POWER
ZONE 2
ZONE 3
ZONE 4
ZONE 5
ZONE 6
JUMPERTO: "TT" ON BOILER
24 VAC
POWER
FUSE 1 AMP
120 V RELAY
ZONE 6
PRIORITY
SR 506
ZONE 2ZONE 3ZONE 4 ZONE 5ZONE 6
ON
OFF
T
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 operate independently.
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.
TACO SR504 & SR506
SWITCHING RELAYS
TECHTANIUM
TEMP CONTROL
120 VAC OUTPUT
TECHTANIUM
CIRCULATOR
COLD START BOILER APPLICATION - PRIORITY FIGURE 3b.
COLD START BOILER APPLICATION - PRIORITY FIGURE 3b.
11
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