Reznor RXH (Outdoor PreevA) Unit Installation Manual - Manual (Page 27)

Form I-RDH/REH/RHH/RXH (12-14), P/N 215210 R14, Page 27
Side Views - Arrows
represent inlet airflow. Rear Inlet Bottom
Inlet
Bottom Inlet &
30% Rear Inlet
Bottom & Rear
Inlets
FIGURE 20 - Option
MXB1 Mixing Box
Configurations
When a mixing box has both an outside air and a return air damper, both dampers
are closed for shipping. The linkage for the return air damper must be adjusted prior to
use. Follow instructions to adjust damper linkage.
Adjust the Damper
Linkage (Option GD4)
6.4.5.2 Mixing Box
Dimensions
FIGURE 21 -
Dimensions of
30% Outside Air
Hood in Mixing Box
Configuration
Option GD6
9-1/8”
232mm
5-3/4”
147mm
12-3/8”
314mm
9-13/16” 249mm
Mixing
Box
Mixing
Box
Factory-intalled
30% Hood
in Option GD6
Factory-intalled
30% Hood
in Option GD6
Side Views
RDH 75-150;
REH 10A-60B;
RXH 000A-B
RDH 175-400A;
REH 30D-120E;
RHH - All Sizes;
RXH 000C-E
The 30% outside air hood is installed on the mixing box at the factory when air inlet
Option GE1 or GE2 is ordered.
1) Open the door on the
side of the mixing box.
2) Loosen the setscrew on
the return air damper
rod at the damper arm.
3) Manually open the
return air dampers.
While the dampers are
opening, the damper
rod and arm will
automatically move to its
correct position.
4) Tighten the setscrew.
Close the door.
FIGURE 22 - Mixing
Box Dimensions
2-3/8” (60mm)
Hinged
Access
Panels
(Both Sides)
Airflow
into the attached
Blower or
Cooling Cabinet
F
A
D
C
3/4” (19mm) 3/4”
(19mm)
18-3/8”
(467mm)
3/4”
(19mm)
3/4”
(19mm)
Rear
Inlet Air
Opening
*
of
opening
Bottom
Inlet Air
Opening
E
**
L of
opening
C
15-1/2”
(395mm)
*
L of opening C
Rear View
Side
View
Bottom
View
RDH REH RHH RXH A C D E** F*
Dimensions (inches ±1/8)
75/100 10A/20A/40A N/A 000A 33-3/4 34-1/2 22-7/8 16-7/8 20-1/4
125/150 15B/30B/60B N/A 000B 43-3/4 34-1/2 26-1/2 21-7/8 20-1/4
175/200/225 N/A 130/180 000C 33-3/4 43-3/4 22-7/8 16-7/8 24-7/8
250/300 30D/60D/90D/120D 260 000D 50 43-3/4 34-3/4 25 24-7/8
350/400A 40E/80E/120E 350 000E 58 43-3/4 45-3/4 29 24-7/8
Dimensions (mm ±3)
75/100 10A/20A/40A N/A 000A 857 877 581 430 515
125/150 15B/30B/60B N/A 000B 1111 877 673 557 515
175/200/225 N/A 130/180 000C 857 1112 581 430 633
250/300 30D/60D/90D/120D 260 000D 1270 1112 883 636 633
350/400A 40E/80E/120E 350 000E 1473 1112 1164 738 633
* Centerline of opening is at 1/2 of 18-3/8” =
9-3/16” (1/2 of 467mm = 233.5)
** Centerline of opening is at 1/2 of D.
Dimension E applies to location of opening for
all configurations.
Duct flange connections are the same size for all mixing box configurations --
D x 18-3/8” (467mm) opening with 3/4” (19mm) flanges.
Rear inlet side may have a factory-attached evaporative cooling module or a field-
installed outside air hood.
TABLE 18 - Mixing
Box Dimensions