AM Series Boilers and Water Heaters
CHAPTER 4: INSTALLATION - PIPING
Page
40
of
154
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0100_0D
03/28/16
Ph.: 800-526-0288
GF-146
NOTE
Use Teflon tape or a suitable pipe joint compound for component
and piping connections.
4.10 Expansion Tank and Makeup Water
Install an expansion tank. Ensure the expansion tank is properly sized for the boiler volume and
the system volume, temperature and pressure.
CAUTION!
Undersized expansion tanks will cause system water to be lost
through the pressure relief valve and cause additional makeup
water to be added to the system. Eventual boiler failure can result
due to this excessive makeup water addition, compromising the
functionality of the unit.
Refer to the expansion tank manufacturer instructions for additional installation details.
Connect the expansion tank to an air separator only if the air separator is located on the suction
side (inlet) of the system circulator.
Always locate and install the system fill connection at the same location as the expansion tank
connection to the system
4.11 Circulator Heating Pump
AM Series boilers and water heaters must be
fitted with a circulator pump. The water
resistance to size the circulator pump to supply
flow through the heating system at the unit’s
connections is shown in graph form in Figure 4-3.
It is up to the installer to ensure the minimum system
flow is not less than 4 GPM at any time.
If the
flow is lower, the unit automatically stops the burner.
To connect a central heating pump on the secondary loop, see Figure 4-7, and t o
electrically connect the pump to the boiler, see Figure 5-3.
Figure 4-3: AM Series Water Side Head Pressure Loss Graph
