Trane EXWA, Руководство по установке

Страница: 15 / 31

WSHP-SVX02A-EN 15
Filling the Loop Pump Kit System
Once the loop, pump module and unit
are fully connected, the system will
need to be filled with water or water/
antifreeze solution. See Page 14 for an-
tifreeze/water mixture by volume.
Fill both sides of the outside portion of
the loop first via the pump module.
The hose kit and unit should be filled
last after purging of the ground loop is
complete.
To fill the outside loop
;
(1)
attach a
water hose to the 1-inch FPT brass
valve ports located on the front of the
pump module (the caps at the front of
the module should be removed).
(2)
Rotate both valve 1 and valve 2 to the
"Position B" to prevent water from go-
ing to the unit.
(3) Turn on the water
and allow the earth loop to slowly fill
with water.
(4) Run the water until a
steady flow of water without air bub-
bles is observed coming out of the dis-
charge hose.
To fill the hose kit and unit
;
(1)
Re-
position valve 1 to the "Position A" to
fill the unit and hose kit.
(2)
Turn the
water on and allow the hose kit and
unit to be filled slowly with water.
(3)
Run the water until a steady flow of
water without air bubbles is observed
coming out of the discharge hose.
System Pressurization
(1)
Rotate both valves 1 and 2 to the
"Position D" to pressurize the system.
(2)
Examine all internal unit fittings or
connections for leaks. (3) After check-
ing for leaks, the system is ready to be
flushed.
Note: There may be a certain amount
of entrained air left in the loop system.
Cleaning and Flushing
the Water Loop
All installations must be thoroughly
flushed to remove air and dirt from the
earth loop before running the system.
The pumps used in the pump module
are not adequate to use for the flush-
ing out of the unit. A secondary pump
capable of delivering 50 gpm at 60 feet
of head (a 1 1/2 hp or larger pump) is
normally suitable for jobs up to six
tons. The loop must be flushed with a
high volume of water at a minimum
velocity of (2 feet per second) in both
directions. See Table 3 for flow rates
required to flush earth loops.
Table 3: System flushing flow rates
Pipe
Gallons per
100 Ft.
Minimum
Flush GPM
3/4" PE 3.02 3.8
1" PE 4.73 6.0
1 1/4" PE 7.55 9.5
1 1/2" PE 9.93 13.0
2" PE 15.36 21.0
Note: The plastic 1-inch MPT valve
plugs must be replaced after filling
and/or flushing is completed.
See "Position C" for valve rotation to
place the valves in RUN position.
Installation
Filling the Hose Kit and Unit and/or
Hose Kit and Unit Flush
Filling the Outside Loop and/or
Outside Loop Flush
Run System Full System Flush