Wall Case
A choice of wall cases is available for the Zoneline.®
RAB71A — This insulated case is constructed of heavy-gauge galvanized steel and finished with a protective baked-enamel finish for protection and appearance. Design of the case provides for support of the chassis and free draining of any water entering the wall case. A petroleum microcrystalline wax is applied at critical points of fabrication to seal against moisture. The dimensions of the RAB71 wall case are: 42" wide by 16" high by 13-3/4" deep, the same dimensions as the original wall case for GE Zonelines built in 1961. The RAB71 wall case is also available in depths other than the standard depth. It is available on special order as: RAB7116 – 16" deep; RAB7124 – 24" deep; RAB7128 – 28" deep; and RAB7131 – 31" deep. All of these special-order deep wall cases are insulated and have sheet metal dividers, or splitters, to prevent the recirculation of condenser discharge air.
RAB77 — This non-insulated wall case is molded from fiberglass-reinforced polyester compound. This SMC (Sheet-Molded Compound) wall case offers outstanding strength, durability, color retention, water integrity and corrosion resistance. The dimensions of the RAB77 wall case are: 42-1/8" wide by 16-1/4" high by 13-7/8" deep.
•Both wall cases are of universal design, accepting all Zoneline chassis of current design as well as all GE Zoneline chassis produced since 1961.
•Drain holes are provided in the rear of the wall case to permit excessive cooling condensate water, heat pump condensate or precipitation entering the wall case to drain freely. A drain kit may be connected to the wall case to control any water draining from the wall case. See page 34 for information on RAD10 Drain Kit.
RAK901L — For installations where the wall case extends into room, RAK901L is an insulation kit that can be used with the RAB77 or any existing non-insulated wall case to minimize the possibility of condensation forming on the indoor side of the case during the winter.
Sub-Base
The sub-base is an optional accessory for the Zoneline and is presented with the wall case information since the decision to use or not to use a sub-base in the installation is a factor in the location of the wall opening for the unit. National Electrical Code® requires that air conditioning units connected to voltages in excess of 250 volts be “permanently connected.” There are also some installations where units connected to voltage sources under 250 volts may also need to be “permanently connected.” If you are in doubt about the requirements for a particular installation, consult Article 440 of the NEC or the local electrical inspector. These requirements are designed to protect personal safety and should be strictly followed. Although NEC is cited here as a reference, all electrical wiring and installations must conform to any and all local electrical codes and regulations.
“Permanent Connection” generally means wiring to the unit must be contained in an enclosed “chaseway,” where access to the wiring connections is more restrictive than a normal line cord plugged into a receptacle. NEC requirements may be met by using flexible or rigid conduit to contain the wiring between the unit and a junction box that contains the wiring connections. The conduit is connected to the unit and to the junction box with connectors to hold the conduit in place. The junction box may be located in the floor or the wall of the structure but only approved connectors may be used outside the unit or the junction box. The sub-base is UL® listed as a junction box for permanent connection of a Zoneline.
Using a sub-base in an installation requiring permanent connection provides a convenient, consistent location for unit wiring to be connected to building wiring. The use of a sub-base is not required, but the convenience and the improved aesthetics it offers makes the use of a sub-base a viable means of permanent connection.
RAK204U — The RAK204U Series of sub-bases provides a variety of designs that fit the site needs and are available for use with Zoneline PTAC/PTHP units. The RAK204U will most likely be used for support of the wall case and unit.
The RAK204U is the same physically as the other sub-bases except there is no receptacle installed. Receptacles and wiring can be field installed and, by using the RAK205CW chaseway and the RAK4002 junction box perform the same function as any of the other sub-base kits by selecting the correct receptacle and installing it in the interior mounting plate inside the RAK204U.
208/230-volt receptacles can also be mounted in the cover plate for easy access when direct connect wiring is not required. 265-volt units are to be “Permanently (or Direct) Connected” and the external receptacle (when wiring is not enclosed in a chaseway) does not meet this requirement.
A knockout for a fuseholder or a disconnect is also provided in the cover plate.
RAK204U — No receptacle, no wiring, will accept any
15-, 20-, 30-amp receptacle and wiring. No chaseway is included. RAK205CW chaseway must be ordered separately.
The 230/208-volt sub-bases below include a short, sub-base power connection kit. Since sub-base connected units are not considered to be line-cord connected, a Leakage Current Detection and Interruption or Arc Fault Current Interrupter device is not necessary.
The junction box (RAK4002A for 2800 and 3800 Series units; RAK4002B for 5800 Series units) that mounts on the chassis of 230/208-volt sub-base connected units must be purchased separately.
RAK204D15P 208/230-volt 15-amp receptacle. Receptacle is NEMA6-20R with 18" of #12AWG wires attached to the receptacle. Short power connection kit included. Chaseway included.
RAK204D20P 208/230-volt 20-amp receptacle. Receptacle is NEMA6-20R with 18" of #12AWG wires attached to the receptacle. Short power connection kit included. Chaseway included.
