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Installing Horizontal Units
Mounting Horizontal Units
Units are available with side or end discharge in left-hand or right-hand return air configurations. Horizontal units are normally suspended
from a ceiling by four 1/2 in. diameter threaded rods. The rods are usually attached to the unit corners by the bottom panel mounting
channel and the mounting grommets furnished with each unit.
CAUTION: Do not use rods smaller than 1/2 in. diameter since they may not be strong enough to support the unit. The
rods must be securely anchored to the ceiling (the units are approximately 800 lbs.).
Figure 1: Typical Horizontal Application
1/2"
Threaded Rods
(4)
Flexible Duct
Collar
Hose Kits
Ball Valves
Insulate supply
plenum and use at
least a 90° elbow
to reduce noise
Layout the threaded rods per the dimensions in Figure 2. Assemble the hangers to the unit as shown in Figure 3. Securely tighten the
brackets to the unit. When attaching the hanger rods to the bracket, a double nut is recommended since vibration could loosen a single
nut. The unit should be pitched approximately 1/2 in. towards the drain in both directions, to facilitate condensate removal.
Figure 2: Mounting Rod Layout
4.13
P/T Plugs
Top View
90.5
Power
Disconnect
Isolation
Grommets
(Included)
Figure 3: Mounting Hardware
26.24
9
RL SERIES INSTALLATION MANUAL
Low
Voltage
Condensate
Drain
Connection
Water Loop
1/2 in. Threaded Rod
(not included)
Vibration
Isolator
Washer
(not included)
Hex Nuts
(not included)
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