Page 20 IM-738
Mechanical Installation
The installation of this equipment shall be in accordance with
the regulations of authorities having jurisdiction and all appli-
cable codes. It is the responsibility of the installer to determine
and follow the applicable codes.
Note: Low head pressure may lead to poor, erratic refriger-
ant feed control at the thermostatic expansion valve.
The units have automatic control of the condenser
fans which should provide adequate head pressure
control down to 50°F (10°C) provided the unit is not
exposed to windy conditions. The system designer is
responsible for assuring the condensing section is
not exposed to excessive wind or air recirculation.
Receiving Inspection
When the equipment is received, all items should be carefully
checked against the bill of lading to be sure all crates and car-
tons have been received. If the unit has become dirty during
shipment (winter road chemicals are of particular con-
cern), it should be cleaned off when received.
All units should be carefully inspected for damage when
received. Report all shipping damage to the carrier and file a
claim. In most cases, equipment is shipped F.O.B. factory and
claims for freight damage should be filed by the consignee.
The unit nameplate should be checked before unloading the
unit to make sure the voltage complies with the power supply
available.
Unit Clearances
Service Clearance
Allow service clearance approximately as indicated in
Figure 19. Also, it is recommended that a roof walkway be
provided to the rooftop unit and along at least the two sides of
the unit that provide access to most controls and serviceable
components.
Figure 19. Service Clearances
CAUTION
Sharp edges are inherent to sheet metal parts, screws,
clips, and similar items and can cause personal injury.
This equipment is to be installed and operated only by
an experienced installation company and fully trained
personnel.
Exercise caution when servicing equipment.
R o o f
W a l k w a y
T o R o o f
A c c e s s
L o c a t i o n
V a r i e s W i t h U n i t A r r a n g e m e n t
R e f e r t o C e r t i f i e d D r a w i n g & N o t e
6 0 "
( 1 5 2 4 m m )
9 6 "
( 2 4 3 8 m m )
6 0 "
( 1 5 2 4 m m )
6 0 "
( 1 5 2 4 m m )
7 2 "
( 1 8 2 9 m m )
A
B C
D E
C
F
L e g e n d :
A = R e t u r n A i r S e c t i o n
B = F i l t e r S e c t i o n
C = C o o l i n g S e c t i o n
D = C o o l i n g / S u p p l y F a n S e c t i o n
E = H e a t S e c t i o n
F = D i s c h a r g e P l e n u m S e c t i o n
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