MCAC-ATSM-201704 Aqua Tempo Super II Series DC Inverter Air-cooled chiller unit (50Hz)
54
V
t
=V
s
v
2
/v
1
-1-3α(T
2
-T
1
)
1-p
1
/p
2
T
1
=lower temperature,
o
F (℃)
T
2
=higher temperature,
o
F (℃)
V
s
=volume of water in system, gal(m
3
)
p
1
=absolute pressure at lower temperature, psia(kPa abs.)
p
2
=absolute pressure at higher temperature, paia(kPa abs.)
v
1
,v
2
=specific volume of water at lower and higher temperature, respectively, ft
3
/lb(m
3
/kg)
α=linear coefficient of thermal expansion; for steel, α=6.5x10
-6
in./in·
o
F(1.2x10
-5
per ℃); for copper,
α=9.5x10
-6
in./in·
o
F(1.7x10
-5
per ℃)
In a chilled water system, the higher temperature T2 is the highest anticipated ambient temperature when
the chilled water system shuts down during summer. The lower temperature in a heating system is often the
ambient temperature at fill conditions(for example, 50
o
F or 10℃).
15.2.10 Selection and installation of the pump
(1)Select the pump
a. Select the water-flow of the pump
The rated water-flow must no less than the unit rated water-flow; in terms of multi-connect the units, that
water-flow must no less than total units’ rated water-flow.
b. Select the left of the pump.
H=h1+h2+h3+h4
H: The lift of the pump.
h1: Main unit water resistance.
h2: Pump water resistance.
h3: Water resistance of the longest water-loop distance, includes: pipe resistance, different valve’s
resistance, flexible pipe resistance, pipe elbow and three-way resistance, two-way resistance or three-way
resistance, as well as filter resistance.
H4: the longest terminal resistance.
(2) Installation the pump
a. The pump should be installed at the water inlet pipe, both of which sides must mount the soft connectors
for vibration-proof.
b. The backup pump for the system (recommended).
c. Units must with a main unit controls (Please see “fielding wiring” for the controls diagram).
15.3 Wiring Installation
All wiring installation should be done by qualified person.
15.3.1 Precautions:
1. The air-conditioner should apply special power supply, whose voltage should conform to rated voltage.
2. Wiring construction must be conducted by the professional technicians according to the labeling on the
circuit diagram.
3. Only use the electric components specified by our company, and require installation and technical
services from the manufacturer or authorized dealer. If wiring connection fails to conform to electric
installation norm, failure of the controller, electronic shock, and so on may be caused.
To Next Page
Loading...
Need help?
General