25VNA4: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
A07588
Fig. 1 – Connecting Tubing Installation
The outdoor unit contains the correct amount of refrigerant charge for
operation with AHRI rated and factory-approved smallest indoor unit
when connected by 15 ft (4.57 m) of field-supplied or factory accessory
tubing.
Adjust refrigerant charge by adding or removing the charge to/from the
unit depending on lineset length and indoor unit as calculated and
displayed on the UI. The user interface (UI) calculates required charge
adjustment and total system charge required. For proper unit operation,
check refrigerant charge using charging information in the Check Charge
section of this instruction.
IMPORTANT: Liquid-line size is 3/8-in. OD for all 25VNA
applications including long line applications.
IMPORTANT: Always install the factory-supplied liquid-line filter
drier. Obtain replacement filter driers from your distributor or branch.
Installation
IMPORTANT: Effective January 1, 2015, all split system and packaged
air conditioners must be installed pursuant to applicable regional
efficiency standards issued by the Department of Energy.
Specifications for this unit in residential new construction market require
the outdoor unit, indoor unit (including metering device), refrigerant
tubing sets, and filter drier, and muffler listed in pre-sale literature. There
can be no deviation. Consult the Service Manual – Air Conditioners and
Heat Pumps Using Puron Refrigerant to obtain required unit changes for
specific applications and for R-22 retrofit.
Step 1 – Check Equipment and Job Site
Unpack Unit
Move to final location. Remove carton taking care not to damage unit.
This unit employs one louver spacer on each of the four sides to prevent
louver movement during operation. The louver spacers are trapped
between the coil surface and louver at the approximate center of each
side (See Fig. 2). This louver spacer should be present and, if dislodged
during shipment, must be reinstalled before unit is placed into operation.
A11380a
Fig. 2 – Louver Spacer Location
Inspect Equipment
File claim with shipping company prior to installation if shipment is
damaged or incomplete. Locate unit rating plate on unit corner panel. It
contains information needed to properly install unit. Check rating plate
to be sure unit matches job specifications.
Step 2 – Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad, tie down
bolts should be used and fastened through knockouts provided in unit
base pan. Refer to unit mounting pattern in Fig. 3 to determine base pan
size and knockout hole location.
A05177
Fig. 3 – Tiedown Knockout Locations
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage.
If proper lineset routing techniques are not followed, variable speed
systems can be susceptible to lineset transmitted noise inside the
dwelling and, in extreme cases, tubing breakage.
INSULATION
SUCTION TUBE
LIQUID TUBE
OUTDOOR WALL INDOOR WALL
LIQUID TUBE
SUCTION TUBE
INSULATION
CAULK
HANGER STRAP
(AROUND SUCTION
TUBE ONLY)
JOIST
1” (25.4 mm)
MIN
THROUGH THE WALL
SUSPENSION
UNIT BASE PAN
Dimension in. (mm)
TIEDOWN KNOCKOUT LOCATIONS in. (mm)
A B C
35 X 35
(889 X 889)
9–1/8 (231.8) 6–9/16 (166.7) 28–7/16 (722.3)
3/4 IN.DIA TIEDOWN
KNOCKOUTS IN BASEPAN
TWO (2) PLACES
C
B
A
VIEW FROM TOP
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