Installation, Operation & MaintenanceVMH 30/36 SERIESHeat Controller, Inc.
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| OUTDOOR SECTION |
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| 3 | REFRIGERANT PIPE CONNECTION |
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| Use a line set of copper pipe to connect the indoor and outdoor units. | ||||||
T | Flaring |
| The line set does not come with the unit and must be purchased separately. | ||||||
1. Measure the distance between the indoor and outdoor sections. Cut a pipe with a pipe cutter, | |||||||||
| a little longer than the required measured distance. |
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| 2. Remove flare nuts attached to indoor and outdoor unit, then | 90O |
| Oblique Roughness Burr | |||||
| put them on the copper pipe, having completed burr removal. |
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| 3. Flare the ends of the pipe by firmly holding the copper pipe |
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| in a die per the dimensions shown in the table below. |
| "A" | Handle | |||||
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| Bar | Bar | |
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| Outer diam. | A in.(mm) |
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| in. (mm) |
| Max. | Min. |
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| Ø1/4”(Ф6.35) | .05”(1.3) | .02”(0.7) |
| Copper pipe | Clamp handle | ||
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| Ø3/8”(Ф9.52) | .06”(1.6) | .04”(1.0) |
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| Ø1/2”(Ф12.7) | .07”(1.8) | .04”(1.0) |
| Indoor unit tubing Flare nut | Pipings | ||
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| Ø5/8”(Ф16) | .08”(2.2) | .08”(2.0) |
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| Ø3/4”(Ф19) | .09”(2.4) | .08”(2.0) | Outer | Tightening Additional tightening | |||
| Tighteningconnection | diam. | torque |
| torque | ||||
| Ø1/4”(Ф6.35mm) | 11.07 ft.lbf | 11.79 ft.lbf | ||||||
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| Align pipes to be connected. | (153kgf.cm) | (163kgf.cm) | |||||
| .Sufficiently tighten the flare nut with fingers, | Ø3/8”(Ф9.52mm) | 18.44 ft.lbf | 19.17 ft.lbf | |||||
| . | and then tighten it with a spanner and torque |
| (255kgf.cm) | (265kgf.cm) | ||||
| Ø1/2”(Ф12.7mm) | 25.82 ft.lbf | 26.55 ft.lbf | ||||||
| wrench as shown. |
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| (357kgf.cm) | (367kgf.cm) | ||||||
| Excessive torque can break nut depending | Ø5/8”(Ф16mm) | 33.20 ft.lbf | 36.65 ft.lbf | |||||
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| (459kgf.cm) | (479kgf.cm) | |||
| on installation conditions, use torques |
| 47.95 ft.lbf | 49.40 ft.lbf | |||||
| provided in the table to the right. | Ø3/4”(Ф9mm) | |||||||
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| (663kgf.cm) | (683kgf.cm) |
4CONNECT THE CABLE TO THE OUTDOOR UNIT
1.Remove the electrical control board cover from the outdoor unit by loosening the screw.
2.Connect the connective cables to the terminals as identified with their respective matched numbers on the terminal block of indoor and outdoor units. See the section of the manual called “connecting the communication cable” on page. 6.
3.Secure the cable onto the control board with the cord clamp.
4.To prevent water from entering the unit, form a loop or
5.Wrap unused wires with electrical tape, so they do not touch any other electrical or metal parts.
Terminal block of outdoor unit
Cover |
Screw
L1 | L2 | S | L1 | L2 |
L1 | L2 | S | L1 | L2 |
To indoor unit | To power supply To indoor unit | To power supply |
| (1) | (2) |
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