11
CONCRETE BASE REQUIREMENTS
• The unit’s base must be made of solid concrete.
• Ensure that the base is level and that the weight of the
unit is distributed evenly.
• Create an outlet near the base for drainage.
• Ensure the roof can handle the unit weight if mounted on
the roof.
• When piping from the bottom of the unit, the base height
should be no less than 8 in. See Fig. 7 and 8 for
additional specifications.
Fig. 7 —Concrete Base (Side View)
Fig. 8 —Concrete Base (Front and Side View)
OUTDOOR UNIT PLACEMENT — Systems with more
than one outdoor unit should be sequenced from highest
capacity to lowest capacity as shown in Fig. 9. The unit with
the largest capacity will be addressed as the header unit and
will be directly connected to the first branch joint at its outlet.
Fig. 9 —Outdoor Unit Placement
SPACE REQUIRED FOR INSTALLATION AND
MAINTENANCE — Ensure there is enough space provided
for installation and maintenance; see Fig. 10 below.
Fig. 10 —Space Required for Maintenance
If the outdoor unit is higher than the surrounding obstacle,
follow Figs. 11-13.
Fig. 11 —Space Required for One Row
Fig. 12 —Space Required for Two Rows
Fig. 13 —Space Required for More Than Two Rows
4 in.
Outdoor unit
Concrete base
Rubber shock proof mat
ĭ
3/8 Expansion bolt
Solid ground or roofing
8 in.
Gas side ball valve
Oil balancing pipe
Liquid side ball valve
Outdoor unit
(336)
Indoor unit C
The 1st branch joint
Indoor unit A Indoor unit B
A(120)
B(120)
C(096)
> 40 in.
> 40 in.
> 40 in.
> 40 in.
4 in. < x < 20 in.
4 in. < x < 20 in.
Top view of the outdoor unit
L
L
L
Front
Front
> 31-1/2 in
L = >
4 in. < x < 20 in.
40 in.
Two rows
L
L
L
L
Front
Front
Front
Front
> 31-1/2 in.
4 in. < x < 20 in.
L = > 40 in.
More than two rows
L
L
L
L
L
Front
Front
Front
Front
Front
Front
> 31-1/2 in.
4 in. < x < 20 in.
L = > 40 in.