14
Installation, Operation & Maintenance - HKV Series
Cableado
del termostato
Válvula compensadora opcional
Salida de agua
Entrada de agua
Válvula invertida opcional para
control de baja presión de agua
(puede montarse en forma interna)
Válvula a bola con tapón
P/T integrado opcional
Manguera trenzada de
acero inoxidable con accesorio
giratorio en “J”
Circuito
de edificación
Disyuntor de
energía de la unidad
(fabricado por terceros)
Alimentación
de energía de
la unidad
Conducto de alimentación
aislado con un codo (mínimo)
de 90 grados para reducir el
ruido del aire
Retorno de
aire
Aire de alimentación
Cableado de
alimentación
de energía
Varillas Roscadas de 3/8"
(fabricadas por terceros)
Colgador
de la unidad
Thermostat
Wiring
Water In
Ball Valve with optional
integral P/T plug
Power
Control Box
Optional Balancing Valve
Water Out
Optional Low Pressure Drop Control Valve
(Can be internally mounted on some models)
Stainless steel braid hose
with internal “J” swivel
Ground
Loop
To Drain,
See Fig. 4
Return
Air
Return
Air
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 Figure 6. All earth loop piping
materials should be limited to only polyethylene fusion for
inground sections of the loop. Galvanized or steel fitting
should not be used at any time due to their tendency to
corrode. All plastic to metal threaded fittings should be
avoided due to their potential to leak in earth coupled
applications and a flanged fitting substituted. P/T plugs
should be used so that flow can be measured using the
pressure drop of the unit heat exchanger in lieu of other
flow measurement means. Earth loop temperatures can
range between 25 to 110°F (-4 to 43°C), and 2.25 to 3 gpm
of flow per ton (2.41 l/m to 3.23 l/m per kW) of cooling
capacity is recommended in these applications. Upon
completion of the ground loop piping, pressure test the
loop to assure a leak free system.
Flushing the Earth Loop
- Upon completion of system
installation and testing, flush the system to remove all
foreign objects and purge to remove all air.
Table 2: Antifreeze Percentages by Volume
Ground-Loop Heat Pump Applications
Figure 6: Typical Earth Loop Application
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CAUTION!
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CAUTION!
The following instructions represent industry
accepted installation practices for Closed Loop Earth
Coupled Heat Pump Systems. They are provided to assist
the contractor in installing trouble free ground loops. These
instructions are recommended only. State 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.
Type
Minimum Temperature for Low Temperature Protection
10°F [-12.2°C]
15°F [-9.4°C]
20°F [-6.7°C]
25°F [-3.9°C]
Methanol
100% USP food grade Propylene Glycol
Ethanol*
25%
38%
29%
21%
25%
25%
16%
22%
20%
10%
15%
14%
* Must not be denatured with any petroleum based product
