Instructions / Assembly

Instruction Sheet
3
⁄
4
" – 2" 4900 Series Air Separators
102-155
SUPERSEDES: October 1, 2009 EFFECTIVE: February 15, 2010
Plant I.D. No. 001-3814
Installation Instructions:
1. The Taco air separator should be installed on the supply side of the boiler
or terminal heating (or cooling) unit as shown in Figure 1 and Figure 2.
2. The Taco air separator should be installed in a horizontal line in a vertical
(or upright) position. It will not operate properly if installed at an angle,
sideways, or upside down.
3. The Taco air separator may be installed so that the flow direction is either
RIGHT to LEFT or LEFT to RIGHT. There is no minimum length of straight
pipe required before entering the air separator.
4. The
1
⁄
2
" female NPT connection on the bottom of the air separator is pro-
vided for connecting a diaphragm type expansion tank.
5. The maximum allowable velocity within the Taco air separator is 5 ft/sec.
6. For the Taco air separator to vent air properly, the fill pressure of the sys-
tem must always be higher than atmospheric pressure. If the atmospheric
pressure is higher than the fill pressure of the system, outside air will be
pulled into the system.
7. The Taco air separator is intended for installations filled with 100% water
or approved glycol solutions (Do Not Exceed 50% Glycol) for hydronic
heating or cooling systems. However, please check with your local dealer,
distributor or representative when using other boiler or system additives.
8. The Taco air separator will arrive with its air valve open. The air valve can
be closed off by turning the screw clockwise. However, for normal auto-
matic performance the vent valve must be open.
9. Do not remove the inlet and outlet screens. These screens keep the “pall”
rings in place. Removal of the screens will allow the rings to enter the sys-
tem and possibly cause damage to system components.
10. Please note that when installing a new system or retrofitting an old, you
should flush out the disturbed dirt as well as any oil film or solder paste
entrained in the system water. This reduces the possibility of debris becom-
ing lodged in the air valve mechanism causing it to stick open and leak.
11. Please leave these instructions with the end user.
12. Taco air separators are for professional use only.
3
5
4
7
6
8
1
2
Caution: Do not solder here.
Product failure will result.
Without Mixing Valve With Mixing Valve
Boiler Boiler
Cooling
Figure 2
Sweat Connection
Figure 3
1. Air chamber
2. Housing (brass)
3. Venting valve
4. Float
5. Gearing
6. PALL rings
7. Protective filter
8.
1
⁄
2
" NPT connection
Heating
Figure 1
Caution: Only apply heat to
the two connections shown
here or product damage
may result
- Maximum working temperature 240°F
- Minimum working temperature 35°F
- Maximum working pressure 150 psi
CAUTION: Use proper soldering techniques on the correct places (see encircled areas on Figure 3) when installing
a sweat style unit. Do Not Overheat! Overheating during installation may cause the venting mechanism
to fail and to leak system fluid.