19
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL
Type Size
Volume
(U.S. Gal/100’ Pipe)
Volume
(Liters/10 Meters)
Copper 1" CTS 4.1 15.5
Copper 1.25" CTS 6.4 24.2
Copper 1.5" CTS 9.2 34.8
Polyethylene .75" - IPS SDR 11 3.0 11.4
Polyethylene 1" - IPS SDR 11 4.7 17.8
Polyethylene 1.25" - IPS SDR 11 7.5 28.4
Polyethylene 1.50" - IPS SDR 11 9.8 37.1
Polyethylene 2" - IPS SDR 11 15.4 58.3
Approximate Fluid Volume per 100’ of Pipe
Type
Minimum Temperature for Freeze Protection
10
°
F (-12.2
°
C) 15
°
F (-9.4
°
C) 20
°
F (-6.7
°
C) 25
°
F (-3.9
°
C)
Methanol* 25% 21% 16% 10%
Environol™ 1000* (premix) 100% 87% 72% 48%
Environol™ 2000* (pure) 27% 24% 20% 13%
Antifreeze Requirements
NOTES: Not all currently available in all areas. All % are by volume.
Antifreeze Selection and Use
Some of the equipment includes freeze detection thermistors to protect the water-to-refrigerant heat exchanger from damage caused by
freezing liquid. Be sure the “Loop/Well” DIP switch is in the “Loop” position if antifreeze is used and in the “Well” position if plain water is
used in the loop.
Selection of the antifreeze solution for closed loop earth coupled systems requires the consideration of many important factors which have
long-term implications on the performance and life of the equipment. Each area of concern leads to a different “best choice” of antifreeze.
The fact is that there is no “ideal” antifreeze and any choice will require compromises in one area or another. Some of the factors to
consider are:
Safety - The toxicity and flammability of the brine (antifreeze
solution of any type).
Thermal performance - The heat transfer and viscosity effects
of the brine.
Cost - The prices vary widely.
Corrosiveness - System materials must be compatible with the brine.
Stability - Will the brine require periodic change out or maintenance?
Convenience - Is the brine available and easy to transport and install?
Codes - Will the brine meet local and national regulatory standards?
The following are some general observations about the types of brine presently being used:
Methanol - Considered toxic in pure form, good heat transfer, low to mid price, flammable in concentrations greater than 25%,
non-corrosive, low viscosity.
Ethanol (Environol 1000 and 2000) - Good heat transfer (slightly less than methanol), high price, flammable in concentrations
greater than 25%, non-corrosive and low viscosity.
Propylene glycol - Nontoxic-noncorrosive, expensive, hard to handle when cold, poorest heat transfer, has formed “slime-type”
coatings inside pipe. Poor heat transfer has required its removal in some systems.
NOTE: Consult with your representative or distributor if you have any questions regarding antifreeze selection, or any comments to report
about problems or success with any particular methods.
CAUTION: Only use premixed antifreeze in a
non-flammable state. Failure to observe safety
precautions may result in fire, injury, or death.
To Next Page
Loading...
