Taco 00e Series Instruction Sheet page 3

Figure 3:
PREFERRED PIPING
FOR ZONE VALVES
ON BOILER SUPPLY
ZONE ZONE ZONE
3 2 1
ALTERNATE PIPING
FOR ZONE VALVES
ON BOILER RETURN
ZONE 3 ZONE 2
V3 V3
ZV3
ZONE 1
V3
ZONE 1 ZONE 2
V3 V3
LAST
AIR PURGING SEQUENCE BY ZONE
KEY:
VI, V2, V3 = SHUT-OFF ISOLATION VALVE
P = TACO CIRCULATOR WITHOUT IFC INSTALLED
FF = FAST FILL BOILER FEED VALVE
PV4 = PURGE VALVE
ZV = ZONE VALVE
RECOMMENDED PURGING STEPS:
1. CLOSE V1, PV4, V2
2. OPEN V3 AND ZV3
3. OPEN FF VALVE
4. OPEN V2, PV4, TO PURGE LAST ZONE
FIRST (ZONE 3)
5. CLOSE FF VALVE
6. CLOSE V2, PV4
7. REPEAT STEPS 1 TO 6 FOR EACH
ADDITIONAL ZONE, PURGE ZONE 1 LAST
8. OPEN V1 WHEN ALL ZONES ARE
PURGED
9. ADJUST SYSTEM TO DESIRED OPERATING
FILL PRESSURE IF REQUIRED
10. MOVE ALL ZV TO CLOSED/AUTOMATIC
POSITION
ZONE 1
ZONE 3
V3
ZV3
FIRST
ZONE 2 ZONE 3
LAST FIRST
AIR PURGING
SEQUENCE
BY ZONE
3