Taco Comfort Solutions 0018e-SF4, Instruction Sheet

Boiler Supply

(Option No. 1)

Boiler Return

(Option No. 2)

Recommended Purging Steps:

Key:

1. Close V1, PV4, V2

Open V3
Open FF valve
Open V2, PV4, to purge last zone

First (Zone 3)
Close FF Valve
Close V2, PV4
Repeat steps 1 to 6 for each

additional zone, purge zone 1 last
Open V1 when all zones are purged
Adjust system to desired operating

fill pressure if required

2.
3.
4.

5.
6.
7.

8.
9.

V1, V2, V3 = Shut-off Isolation Valve

P = Taco circulator with IFC installed

FF = Fast Fill Boiler Feed Valve

PV4 = Purge Valve

-3-

1. Location: 

The circulator can be installed on the supply or return side of the water heater or heat source.   

  See Figures 2 & 3 on previous pages for preferred locations.

2.  Mounting Position: 

Circulator must be mounted with the motor in the horizontal position.  

  See diagrams on page 4 for acceptable motor mounting orientations.

3.  Flange model: 

Fasten circulator to system piping. The circulator flanges incorporate a nut grabber feature for easier installation

4.  Union Model: 

Install the union tailpiece fitting set (sold separately) best suited for your system piping.    

  (See union fitting options chart on the back cover). Install circulator by attaching pump casing to each union tailpiece fitting.  

  Tighten union nut onto circulator threading (being careful not to overtighten) to complete the installation.

CAUTION: 

Do not use flat rubber gaskets. Only use O-ring gaskets provided or leaks may result. Warranty will be void.

Figure 3:

Typical Installation for Zoned Hydronic Heating Systems

Boiler Supply

(Option No. 1)

Boiler Return

(Option No. 2)

Recommended Purging Steps:

Key:

1. Close V1, PV4, V2

Open V3
Open FF valve
Open V2, PV4, to purge last zone

First (Zone 3)
Close FF Valve
Close V2, PV4
Repeat steps 1 to 6 for each

additional zone, purge zone 1 last
Open V1 when all zones are purged
Adjust system to desired operating

fill pressure if required

2.
3.
4.

5.
6.
7.

8.
9.

V1, V2, V3 = Shut-off Isolation Valve

P = Taco circulator with IFC installed

FF = Fast Fill Boiler Feed Valve

PV4 = Purge Valve