Thomas & Betts RZ405, RGM 405 Discharge Plenum Sizes, Inlet Base Sizes 350 and 400 only

Figure 22 -

Optional

Outside Air

and Return

Air Mixing

Box

Configurations/Accessories

Before installing, check to be sure that the configuration of the mixing box matches the order and that any accessories ordered are part of the cabinet. Factory-installed optional accessories could include a damper motor, potentiometer, return air controller, mixed air controller, and/or filters. NOTE: If the potentiometer is to be field-installed, it is shipped in a separate carton.

Option	Configuration
GA1	Top Outside Air Opening with Dampers/
	Rear or Bottom Return Air Opening without Dampers
GA2	Rear Outside Air Opening with Dampers/
	Top or Bottom Return Air Opening without Dampers
GA3	Bottom Outside Air Opening with Dampers/
	Top or Rear Return Air Opening without Dampers
GA4	Bottom Outside Air Opening with Dampers/
	Rear Return Air Opening with Dampers
GA5	Bottom Outside Air Opening with Dampers/
	Top Return Air Opening with Dampers
GA6	Rear Outside Air Opening with Dampers/
	Top Return Air Opening with Dampers
GA7	Rear Outside Air Opening with Dampers/
	Bottom Return Air Opening with Dampers
GA8	Top Outside Air Opening with Dampers/
	Rear Return Air Opening with Dampers
GA9	Top Outside Air Opening with Dampers/
	Bottom Return Air Opening with Dampers

Figure 23 - Dimensions of Optional

Mixing Box - inches (mm)

	150-200	250-400
A	38 (965)	50 (1270)
B	22-3/4 (578)	36-1/2 (927)
C	7-5/8 (194)	6-3/4 (171)

Note: Damper frame fits in the inlet opening.

20. Discharge Plenum (Sizes 350

and 400 only)

The optional discharge plenum is designed to be used with a screened mounting base (Paragraph 21) to create a "packaged stand-alone" upflow system that circulates building air. However, the discharge plenum may also be used in place of ductwork in applications that do not have an optional mounting base.

The discharge plenum is available in three types. Option CD60 and CD61 are for a heater without a cooling coil; Option CD60 is designed for an open area and Option CD61 includes field-installed blockoff plates to block off one or two sides. Option CD62 can only be ordered with a cooling coil and includes blockoff plates to provide higher veloc- ity required for cooling.

A discharge plenum adds 49-15/16" (1268mm) to the height of the heater. (If installing Option CD62, this height includes the cooling coil.)

21.Inlet Base (Sizes 350 and 400 only)

The optional mounting base is designed to support a Model CAUA 350 or 400 heater while providing an inlet for return air. The mounting base is designed to be used with an optional discharge plenum (Paragraph 20) creating a "packaged stand-alone" heating or heating/cooling upflow system which can be used in an air turnover application.

However, if the installation requires it, the mounting base may also be used with discharge ductwork.

The mounting base has guarded openings on all four sides and is avail- able with optional 1" flat disposable, 1" permanent aluminum, or 1" pleated disposable filters.

The base is designed for a fairly open area and must have at least three of the four sides open.

The base adds 36-1/2" (927mm) to the overall height.

Mfg No. 164771, Page 21