4
FLOW CENTER INSTALLATION AND LOOP FLUSHING MANUAL
Flow Center Initial Inspection
Please read the complete instructions before starting installation. Carefully follow instructions to ensure optimum and
safe operation. Leave the instructions with the owner after installation. The GeoLink
®
Flow Center and UP Series circulating
pumps should be installed according to all applicable codes. Unpack the fl ow center and any other component kits required
and inspect them for shipping damage. Shipping damage claims must be fi led promptly by the purchaser with the freight
company.
Verify the contents of this package with the following list:
(2) Lag screws 1/4'' X 2.5''
(4) Long sheet metal #10 X 3/4'' screws (for mounting on unit)
(2) 1" MPT Brass plug (Not included with FPTB or GL series)
(1)
Decal
(1)
Installation
manual
(2) 1-1/4'' PE Socket Adapters (GL models only)
Notes:
The fl ow centers are injected with foam for condensation prevention during low temperature operation and for noise
attenuation. Pump heads can be fi eld replaced.
Typical Installation
The Flow Centers are insulated and contain all fl ushing and circulation connections for residential and light commercial
earth loops which require a fl ow rate of no more than 20 gpm. One-inch female pipe thread fi ttings are furnished with FC1-
FPT, FC1-FPTB, FC2-FPT and FC2-FPTB units for loop connections. Various fi ttings are available for FC1-GL and FC2-GL
units for loop connections. See Adapter Sets table below and Connection Options table (page 5) for all adapter fi ttings.
Typically, one-pump fl ow centers are used on 3-ton and smaller systems, and two-pump fl ow centers are used on 3.5-ton
to 6-ton systems. However, this is a rule of thumb, and should always be verifi ed by a pressure drop calculation.
See "Pres-
sure Drop Calculation Manual" or use Pressure Drop software program to determine correct pump selection.
WARNING:
Before performing service or maintenance operations on the system, disconnect all power
sources. Electrical shock could cause personal injury. Before applying power, make sure that all covers
and screws are in place. Failure to do so could cause risk of electrical shock.
PART NO.
DESCRIPTION
CONNECTION USE
FLOW CENTER
TYPE
MA4INS
1
" MPT to 1" INS (Hose Barb)*
Loop or unit side connection
FPT
MA5INS
1
" MPT to 1-1 /4" INS (Hose Barb)*
Loop or unit side connection
FPT
MA5PES
1
" MPT to 1-1/4" PE (Socket Fusion)
Loop side connection
FPT
MA4SWV
1” MPT to 1” Swivel Union
Unit side connection
FPT
GL4INS
1
"
GeoLink fi tting x 1
"
Hose Barb
Unit side connection
GL
GL4PES
1
"
GeoLink fi tting x 1
"
Socket Fusion
Loop or unit side connection
GL
GL5PES**
1
"
GeoLink fi tting x 1-1/4
"
Socket Fusion
Loop side connection
GL
GL-FP
1
"
GeoLink fi tting x 1
"
cam lever elbow (male)
Flushing port connection
GL
Adapter Sets (Sets consist of 2 connectors)
Notes:
*Hose Clamps included with barbed adapter sets.
Safety Considerations
General Installation Information
