Rheem RPVS Series Installation, Operation & Maintenance Instructions Manual page 11

-6°C] and low temperature protection should be at 15°F
[-10°C]. Calculation is as follows:
30°F - 15°F = 15°F [-1°C - 9°C = -10°C].
All alcohols should be premixed and pumped from a
reservoir outside of the building when possible or introduced
under the water level to prevent fumes. Calculate the
total volume of fl uid in the piping system. Then use the
percentage by volume shown in Table 3 for the amount
of antifreeze needed. Antifreeze concentration should be
checked from a well mixed sample using a hydrometer to
measure specifi c gravity.
Table 2: Approximate Fluid Volume (U.S. gal. [L]) per
100' of Pipe
Fluid Volume (gal [liters] per 100' [30 meters) Pipe)
Pipe
Copper
Rubber Hose
3/4" IPS SDR11
1" iPS SDR11
1.25" IPS SDR11
1.5" IPS SDR11
Polyethylene
2" IPS SDR11
1.25" IPS SCH40
1.5" IPS SCH40
2" IPS SCH40
Unit Heat Exchanger
10" Dia x 3ft tall
Flush Cart Tank
[254mm x 91.4cm tall]
Table 3: Antifreeze Percentages by Volume
Type
Methanol
100% USP food grade Propylene Glycol
Ethanol*
* Must not be denatured with any petroleum based product
Ground-Loop Heat Pump Applications
Size Volume (gal) [liters]
1" 4.1 [15.3]
1.25" 6.4 [23.8]
2.5" 9.2 [34.3]
1" 3.9 [14.6]
2.8 [10.4]
4.5 [16.7]
8.0 [29.8]
10.9 [40.7]
18.0 [67.0]
8.3 [30.9]
10.9 [40.7]
17.0 [63.4]
Typical 1.0 [3.8]
10 [37.9]
10°F [-12.2°C]
25%
38%
29%
CAUTION! To avoid equipment damage, DO NOT allow
system water pressure to exceed 100 psi. when using the
RPVE Outdoor Compressor Section. The expansion tank
in the RPVE has a maximum working water pressure of
100 psi. Any pressure in excess of 100 psi may damage
the expansion tank.
Low Water Temperature Cutout Setting - ICC Control
When antifreeze is selected, the FP1 jumper (JW1) should
be clipped to select the low temperature (antifreeze 10°F
[-12.2°C]) set point and avoid nuisance faults (see "Low
Water Temperature Cutout Selection" in this manual). NOTE:
Low water temperature operation requires extended range
equipment.
Figure 5: Loop Connection (Indoor
Compressor Section)
Unit Power
Disconnect
AH & Thermostat
Wiring
Air Pad or
Extruded
polystyrene
insulation board
Minimum Temperature for Low Temperature Protection
15°F [-9.4°C]
21%
25%
25%
R e s i d e n t i a l S p l i t
R e v. : 1 3 M a r c h , 2 0 1 5
CAUTION!
Flow
Controller
Insulated
Hose Kit
20°F [-6.7°C] 25°F [-3.9°C]
16%
22%
20%
To Loop
P/T Plugs
10%
15%
14%
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