2-17, Installing The Multiplex Remote Condenser

Section 2	Installation

PRE-CHARGED REFRIGERATION LINE REQUIREMENTS

Important

If you have a MAC Multi-Pass condenser please add three (3) pounds additional charge.

1.Both the discharge and liquid remote condensing lines must be kept to a minimum distance for maximum performance. All Multiplex systems are capacity rated to 100 ft (30.5 m) tubing distance between the compressor and condenser. If you have another brand condenser, please add additional charge for the condenser (example: up to three (3) pounds for a MAC condenser).

2.Any vertical rise 25 ft (7.62 m) or greater must have a manufactured or installed trap (bend), in the discharge refrigeration line from the compressor to the remote condenser. A trap is necessary for every additional 25 ft (7.62 m) vertical rise. When excessive vertical rise exists, this trap allows oil to reach the condenser and return to the compressor.

3.The easiest method to create a trap is to bend the tubing (smoothly, no kinks) into the trap form.

Discharge Line

Condenser Trap

To the

Condenser

3" (7.6 cm) x 6" (15.2 cm)	Discharge Line Trap Every
Maximum Trap Area	25 Vertical ft. (7.62 m)

Compressor

3 ft (.9 m) (minimum) of Discharge

Line Trap at the Compressor

4.The trap(s) must be of minimum height of 3" (7.6 cm) and a width of 6" (15.2 cm) to minimize oil accumulation. The traps can also be bent out of the refrigeration tubing.

Carefully bend the tubing down 12", and then sweep the tubing back up.

5.It is critical that the Multiplex remote condensing line size specifications for the specific model be maintained. The specifications are 1/2” discharge and 3/8” liquid lines.

INSTALLING THE MULTIPLEX REMOTE CONDENSER

The Multiplex remote condensing units have a 208-230 Volt, 50/60 HZ, 1 PH fan motor that includes a permanent split capacitor and internal overload protection. The electrical wires from the refrigeration unit wire to the condenser. The electrical installation must be in accordance with local codes, National Electrical Code and regulations.

1.Determine a position for installation that will allow access for maintenance and is free from obstruction. Verify hot air discharge from other condensers does not interfere with the inlet of this condenser.

2.Install the four legs to the sides of the condenser using the mounting bolts provided.

3.The General Contractor or Owner must secure two treated lumber 4" x 4" x 36" (or longer). You may then mount the remote condenser to the treated lumber.

4.The General Contractor or Owner must install a 3" pitch pot in the roof. Then seal for weather protection.

3" Pitch

Roof

5.Locate the pre-charged refrigeration lines shipped with the system. These lines must be a correct length for the building design. Avoiding any kinks, neatly route these lines from the remote condenser to the refrigeration unit. Excess refrigeration tubing must be handled in one of two ways. When coiling the excess tubing, make sure the inlet to the coil is at the top of the coil and the exit is the bottom of the coil. There can be no more than one turn to the coil. If you have more tubing, you must cut out the excess before connecting the ends. When cutting the tubing, you must first evacuate the refrigerant (line sets have a positive refrigerant holding charge of two to three ounces). After shortening and welding the tubing together again, you must vacuum the tubing to 250 microns. Then recharge the tubing with the appropriate refrigerant at 4 ounces per length of tubing.

!Caution

Excess refrigeration tubing must be properly cared for before being connected to either the remote condenser or the refrigeration unit.

Part Number 020001552 5/11