Installation manual

6
ENVISION RESIDENTIAL INSTALLATION MANUAL
Installing Horizontal Units
Remove and discard the compressor hold down shipping bolt located at the front of the compressor mounting bracket
prior to setting the unit in place. Horizontal units are available with side or end discharge. Horizontal units are normally
suspended from a ceiling by six 3/8-inch diameter threaded rods. The rods are usually attached to the unit by hanger
bracket kits furnished with each unit.
Lay out the threaded rods per the dimensions below. Assemble the hangers to the unit as shown. Securely tighten the
brackets to the unit using the weld nuts located on the underside of the bottom panel. When attaching the hanger rods to
the bracket, a double nut is required since vibration could loosen a single nut. To allow filter access, one bracket on the filter
side should be installed 180° from the position shown in the figure below. The unit should be pitched approximately 1/4-inch
towards the drain in both directions to facilitate the removal of condensate. Use only the bolts provided in the kit to attach
hanger brackets. The use of longer bolts could damage internal parts.
Some residential applications require the installation of horizontal units on an attic floor. In this case, the unit should be
set in a full size secondary drain pan on top of a vibration absorbing pad. The secondary drain pan prevents possible
condensate overflow or water leakage damage to the ceiling. The secondary drain pan is usually placed on a plywood base
isolated from the ceiling joists by additional layers of vibration absorbing material.
CAUTION: Do not use rods smaller than 3/8-inch diameter since they may not be strong enough to support
the unit. The rods must be securely anchored to the ceiling.
General Installation Information cont.
Insulate supply
plenum and use
at least one 90
elbow to
reduce noise
Electrical
Disconnect
Flexible Duct
Collar
Threaded Rods
Line Voltage
Ball Valves
Hose
Kits
T o Line
Power
T o
Thermostat
Hanging
Brackets
(Included)
Building Water Loop
O
Figure 2: Horizontal Unit Mounting
Figure 3: Hanger Location and Assembly
3/8" Threaded
Rod (by others)
Hex Nuts (2)
(by others)
Washer
Vibration
Isolator
Bolt and
Lock Washer
A
24.8
2 7. 8
2 7. 8
2 7. 8
25.1
25.1
Model
022 - 030*
036 - 038
042 - 049
060 - 072
009 - 012*
015 - 018*
Hanger Kit
Part Number
995500A04
995500A03
995500A03
995500A03
995500A04
995500A04
B
63.4
72.4
77.4
82.4
44.7
53.7
C
21.1
24.1
24.1
24.1
21.4
21.4
D
N /A
43.1
48.1
53.1
N /A
N /A
E
N /A
29.3
29.3
29.3
N /A
N /A
F
1.1
1.1
1.1
1.1
1.3
1.3
NOTE: *Only the four corner brackets are needed on sizes 009-030.
C
F
B
Air Coil
Air Coil
D
E
A