Unit placement
About this task:
NOTICE
Heat pumps will defrost periodically resulting in
water drainage. The unit must not be located where
water drainage may freeze and create a hazardous
condition - such as sidewalks and steps.
1. Provide a base in the pre-determined location.
2. Remove the shipping carton and inspect for
possible damage.
3. Ensure that compressor tie-down bolts remain
tightened.
4. Position the unit on the base provided.
Liquid line filter-drier
The filter-drier is packaged and shipped along with the
outdoor unit. It is located outside the unit next to the
service valves.
CAUTION
Filter-drier is required to be installed in liquid line. The
recommended location is at the indoor coil before the
refrigerant metering device. It can be installed at the
outdoor unit if desired.
CAUTION
Using a granular type drier may result in damage to
the equipment.
CAUTION
Filter-drier must be wrapped in wet rag while brazing.
NOTICE
Replacements for the liquid line drier must be bi-flow
and an approved replacement from Source 1.
R-410A filter-drier source
1 Part Number
Apply with models
S1-404101 All heat pumps
Piping connections
The outdoor unit must be connected to the indoor coil
using field supplied refrigerant grade (ACR) copper
tubing that is internally clean and dry. Units should be
installed only with the tubing sizes for approved system
combinations as specified in tabular data sheet. The
charge given is applicable for total tubing lengths up to
15 ft (4.6 m). See Piping Application Guide (P/N 247077)
for installing tubing of longer lengths and elevation
differences.
NOTICE
Using a larger than specified line size could result in
oil return problems. Using too small a line will result
in loss of capacity and other problems caused by
insufficient refrigerant flow. Slope horizontal vapor
lines at least 1 in. (2.5 cm) every 20 ft (6.1 m) toward
the outdoor unit to facilitate proper oil return. If more
than the 80 ft line length is necessary, facilitate proper
refrigerant velocity with adjusted line diameter in
accordance with the Piping Application Guide (P/N
247077).
CAUTION
This system uses R-410A refrigerant which operates
at higher pressures than R-22. No other refrigerant
may be used in this system. Gauge sets, hoses,
refrigerant containers, and recovery system must be
designed to handle R-410A. If you are unsure, consult
the equipment manufacturer.
WARNING
Never install a suction-line filter drier in the liquid line
of an R-410A system. Failure to follow this warning
can cause a fire, injury or death.
R-410A Outdoor Split-System Heat Pump Installation Manual - YH2E / THE2 / RHP143 Series 9
Johnson Controls Ducted Systems
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