severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which would result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen-
tial construction practices. We require these instructions as a
minimum for a safe installation.
INTRODUCTION
The 657A units (see Fig. 1) are fully self-contained, and designed
for outdoor installation. See Figs. 2–5 for unit dimensions. All
units are shipped in a horizontal-discharge configuration for
installation on a ground-level slab. All units can be converted to
down-flow discharge configurations for rooftop applications. (See
Fig. 6 for roof curb dimensions.)
RECEIVING AND INSTALLATION
I.
CHECK EQUIPMENT
A.
IDENTIFY UNIT
The unit model number and serial number are stamped on the unit
identification plate. Check this information against shipping pa-
pers.
B.
INSPECT SHIPMENT
Inspect for shipping damage while unit is still on shipping pallet.
If unit appears to be damaged or is torn loose from its anchorage,
have it examined by transportation inspectors before removal.
Fig. 2— 657A024-030 Unit Dimensions (without base rails)
UNIT
ELECTRICAL CHARACTERISTICS
UNIT WEIGHT
CORNER WT
LB/KG
CENTER OF GRAVITY
IN/MM
lb.
kg
A
B
C
D
X
Y
Z
657A024
208/230-1-60
257
117
57/26
69/31
75/34
56/25
20.4/519
21.1/540
11.2/286
657A030
208/230-1-60
288
131
56/25
87/40
74/34
71/32
20.3/518
21.5/547
11.2/286
C95003
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