Enertech WD240, Руководство по установке и эксплуатации, Страница: 7 / 32

7
IOM, WD Models Enertech Global
The illustration below shows the parameters which are
safe for compressor operation. Based on the leaving load
water of 120°F, the loop would have to maintain 35°F to
operate within the acceptable operating conditions for the
compressor. Once your loop temperatures drop below 35°F,
the acceptable leaving load temperature drops below 120°F.
If you are designing loops for 30°F, the recommended leaving
load temperature is 110°F. Because the water-to-water
machines have become so popular for providing heated water
for a multitude of uses, we’ve provided the above chart for
reference.
The obvious correlation is that the warmer the Source Entering
Water Temperature, the hotter the Load Leaving Water
Temperature can be, to a point. R410A can only handle up to
about 125°F Load Leaving Water Temperature before putting
the compressor at risk.
Actual usage, and choices of heat distribution devices need to
follow the acceptable operating conditions presented in the
chart. If a question arises, please consult the Technical Services
Department.
•
•
•
•
•
• • • • • • •
Acceptable Operating Conditions
45°F
40°F
35°F 30°F
25°F 20°F
15°F 10°F
100°F
110°F
115°F
120°F
125°F
130°F
SCROLL COMPRESSOR OPERATING CONDITIONS (WATER TO WATER)
HEATING MODE OPERATION
Source Entering Water Temperature
• • • • •
70°F
65°F
60°F 55°F 50°F
FAILURE ZONE
Acceptable Operating Conditions
Outside Safe Operating Range
O
utside S
af
e Oper
ating R
ange
•
•
•
•
75°F
•
80°F
FAILURE ZONE
Load
Lea
ving
W
at
er T
emper
atur
e
Safety
Factor
Safety
Factor
Enertech recommends the aquastat setting not be set above
110°F for the storage tank temperature. Excessive vibration
and part failure can occur at higher than recommended
temperature settings. The higher operating temperatures
cause substantial efficiency and capacity reductions.
The performance is negatively affected as the unit operates
at the higher water temperatures and it benefits the unit and
the homeowner to operate at or below the recommended
water temperature of 110°F.
With the lower efficiency created by higher water
temperatures, the output capacity of the unit is decreased
along with the efficiency. When operating at the higher
entering water temperature the heat of extraction is
significantly reduced, as well. In order to maintain the
needed capacity, more of the heat is coming from the
compressor working harder to compress the refrigerant.
Section 3: Installation Considerations
Guidelines For Heating Mode Operation