Envision Peripherals R-410A Installing Horizontal Units, Horizontal Unit Mounting

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 sus- pended 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.

Figure 2: Horizontal Unit Mounting

Flexible Duct Collar

Insulate supply plenum and use at least one 90O elbow to reduce noise

Threaded Rods

To Line

Power

To

Thermostat

Electrical

Disconnect

Line Voltage

Building Water Loop

Hanging Brackets (Included)

Hose

Kits

Figure 3: Hanger Location and Assembly

F	B
	Air Coil
A	C
	Air Coil
E	D

3/8	Vibration Isolator
Threaded Rod
(not supplied)	Washer
	Hex Nuts
Bolt and	(not supplied)
Lockwasher

Model	A	B	C	D	E	F
022 - 030	24.8	63.4	21.1	38.1	25.3	1.1
036 - 038	27.8	72.4	24.1	43.1	29.3	1.1
042 - 049	27.8	77.4	24.1	48.1	29.3	1.1
060 - 072	27.8	82.4	24.1	53.1	29.3	1.1

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