Ground Loop Applications; Water Connections - Carrier GT-PX Split Series Installation, Operation & Maintenance Instructions Manual

Internal Flow Controller Mounting -
"Outdoor" Compressor Section Only
The Flow Controller can be mounted in the "outdoor"
compressor section directly inside the cabinet as shown in
Figure 5. Remove the water legs from the outdoor unit at the
union fi ttings. Attached the AFC4T 1" MPT x o-ring fi ttings
to the removed water legs. Carefully attached the Flow
Controller to the loop piping and mount to the outdoor unit
using the mounting lugs attached to the unit. Insert the water
legs into the Flow Controller using the o-ring fi ttings. Re-
connect the water leg unions.
NOTICE! Opening in the bottom of the unit for loop piping
must be sealed to prevent rodents from getting into the
cabinet and damaging control wiring. Spray type foam may
be used to seal the opening(s).
Figure 6: AFC4T Connector
CAUTION!
CAUTION! The following instructions represent industry
accepted installation practices for closed loop earth
coupled heat pump systems. Instructions are provided
to assist the contractor in installing trouble free ground
loops. These instructions are recommendations only.
State/provincial and local codes MUST be followed and
installation MUST conform to ALL applicable codes. It is
the responsibility of the installing contractor to determine
and comply with ALL applicable codes and regulations.
GROUND-LOOP HEAT PUMP APPLICATIONS
C a r r i e r : Tu r n t o t h e E x p e r t s
R e s i d e n t i a l S p l i t - 6 0 H z R 2 2 & R 4 1 0 A
Figure 5: Water Connections (Outdoor Compressor Section)
Pre-Installation
Prior to installation, locate and mark all existing underground
utilities, piping, etc. Install loops for new construction before
sidewalks, patios, driveways, and other construction has
begun. During construction, accurately mark all ground loop
piping on the plot plan as an aid in avoiding potential future
damage to the installation.
Piping Installation
The typical closed loop ground source system is shown in
Figures 7 and 8. All earth loop piping materials should be
limited to polyethylene fusion only for in-ground sections of
the loop. Galvanized or steel fi ttings should not be used at
any time due to their tendency to corrode. All plastic to metal
threaded fi ttings should be avoided due to their potential to
leak in earth coupled applications. A fl anged fi tting should
be substituted. P/T plugs should be used so that fl ow
can be measured using the pressure drop of the unit heat
exchanger.
R e v. : 5 J u n e , 2 0 0 8
Installation
1" IPT Water Connections
Mount Flow Controller
on studs provided
Wire pump power
using provided wires
for L1 and L2
11