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It should be remembered that heat pump access will be
limited in this mounting position.
Concrete wall - Mounting onto a concrete wall can be
accomplished by using 4-1/4" 'Tapcon' screws (supplied
by others) directly into the concrete wall.
Piping Installation
Figure 3. Mounting Flow Controller on Side of Unit
1/4" Lag Bolts
directly into
Stud
The Flow controller features 1" FPT fittings for flexible
and easy installation. Table 1 illustrates the connections
options available for the 7602-300 & 301. Avoid using 3/4"
piping on flows greater than 6 gpm. Pressure drop in
piping systems should be calculated to insure adequate
flow through unit. All piping should be insulated with
closed cell insulation of 1/2" wall thickness. Table 2
shows the insulation requirements for typical piping
materials. Piping insulation should be glued and sealed to
prevent condensation using closed cell insulation glue.
The swivel connectors on the flow controller are
designed to be hand tightened only.
Table 1.
Connection Materials
To
Fittings
PVC
1" MPT x 1" PVC Glue Socket
PE Fusion
1" MPT x 1-1/4" PE Fusion
PE Barb
1" MPT x 1-1/4" insert barb*
Copper Sweat
1" MPT x 1" sweat
Copper Thread 1" MPT x 1" MPT Nipple
* Use double all-stainless hose clamps
Table 2. Typical Piping Insulation Materials
Piping Material
Piping Material
1" Hose Kit
1" Hose Kit
1" IPS PE
1" IPS PE
1-1/4" IPS PE
1-1/4" IPS PE
2" IPS PE
2" IPS PE
Loop side piping is typically polyethylene piping
directly into the flow controller. Connection to the flow
controller can be accomplished by a fusion to brass MPT
adapter. In multiple flow controller systems
such as multifamily housing, PVC can also be used on
the loop side, remembering however that the transition
from PVC to PE should be accomplished by a flange
connection and PVC is approved for use only as an
indoor piping material in earth loops.
Unit side piping is typically connected using the hose kit
7602-103 which contains all fittings necessary for
connection between the flow controller and the unit as
shown in Figure 4.
Figure 4. Hose Kit typical Detail
To Heat Pump 1"
Swivel Fitting
P/T Plug
In multiple unit systems, PVC adapter's (1 1/4" MPT x
PVC socket) to the flow controller and standard PVC
piping materials can be used to 'tee' more than one unit
into the flow controller. It is recommended that a hose kit
still be used at the end of the PVC piping run to facilitate
ease of installation and service of the units as shown in
Figure 5. Insulate all exposed piping and plastic to metal
threads should not be used due to their leakage potential.
Figure 5. Two Units Utilizing One Flow Controller
(one side shown)
1 or 1-1/2"
SCH 40 PVC
To Heat Pump #1
Rubber Hose Max of
15' each side
4
Insul Description
Insul Description
1-3/8" ID - 1/2" wall
1-3/8" ID - 1/2" wall
1-1/4" ID - 1/2" wall
1-1/4" ID - 1/2" wall
1-5/8" ID - 1/2" wall
1-5/8" ID - 1/2" wall
2-3/8" ID - 1/2" wall
2-3/8" ID - 1/2" wall
To Flow Controller 1" npt
(fitting included in FC2)
All Stainless Hose
Rubber Hose Max of
Clamp
15' each side
From Flow Controller
1" MPT x Glue Socket
Insert Barb x
Glue Socket
Rubber Hose Max of
15' each side
To Heat Pump #2
3
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