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Figure 3. Flow Controller Mounting
Internal FC1 Flow Controller Mounting
The Flow Controller can be mounted in the GT-S unit
directly inside the cabinet as shown in Figure 3. Studs are
provided with which to mount the flow controller.
Carefully mate the water lines from the GT-S unit into
the flow controller swivel connections. The GT-S water
connections are 1-1/4" Male Pipe Thread (MPT)
designed to mate with swivel piping fittings of the FC1
flow controller. NOTE THE FC2 UTILIZES 1" FPT.
The swivel connector has a rubber gasket seal similar to a
garden hose gasket, which when mated to the flush end
of any 1-1/4" threaded pipe provides a leak-free seal
without the need for thread sealing tape or compound.
Check to insure that the rubber seal is in the swivel
connector prior to attempting any connection. (The
rubber seals are shipped attached to the swivel
connector.) If the fitting does not fit over the brass swivel
fitting, emory cloth can be used to knock the edge off of
the Flow Controller internal swivel fitting. DO NOT
OVERTIGHTEN or leaks may occur.
Figure 3 also
shows the installation of an AFCS1 adaptor kit for
use with the GT-S to extend the non-pump connection
up to the GT-S water connections
Figure 4. The Female Locking Ring is threaded onto
the pipe threads which holds the male pipe end
against the gasket, and seals the joint. HAND
TIGHTEN ONLY! DO NOT OVERTIGHTEN!
Connecting the Earth Loop To FC1
NOTE THE FC2 UTILIZES 1" FPT. The earth loop
trench should be continued directly under the GT-S unit
as shown in Figure 5. When connecting the earth loop to
the GT-S unit, care should be taken to measure the
supply return piping before cutting and adding the fitting
for connection to the flow controller. Allow movement
of the pipe for fusion and/or connection up into the flow
controller. Prevent the pipe from exerting stress on the
fitting and insure proper backfill to support the pipe
during any trench settling. The pipe can be bent to relive
any pressure on the fitting.
Any standard 1-1/4" MPT should fit the swivel fittings of
the flow controller. Some PE to Flow Controller
connection options are:
• GMA6INS 1-1/4" mpt x 1-1/4" barb
• GFMC66S 1-1/4" mpt (swivel) x 1-1/4" barb
• GFMA66 1-1/4" mpt x 1-1/4" PE fusion
All 1-1/4" piping should be completely and continu-
ously insulated with a minimum 1/2" x 1-5/8" ID
closed cell insulation from below the ground surface
to the flow controller (1-1/4" ID for 1" IPS PE).
Flush and Filling of the Earth Loop
Once piping is completed between the unit, flow center
and the ground loop, final purging and charging of the
loop is needed. A flush cart (at least a 1.5 hp pump) is
needed to achieve adequate flow velocity in the loop to
purge air and dirt particles from the loop itself. All air
and debris must be removed from the earth loop piping
system before operation. Flush the loop with a high
volume of water at a high velocity (2 fps in all piping),
both directions. The steps below must be followed for
proper flushing and are presented in more detail in the
Flow Controller Installation Manual.
Figure 4. Swivel Connections
Gasket
Swivel Nut
Stainless steel
snap ring
Brass Adaptor
Hand Tighten
Only!
Do Not
Overtighten!
