Comfort-Aire HTS Series Split System,Two Stage, 2-5 Tons - Manual (Page 8)

8
Installation, Operation & Maintenance HTS SERIES SPLIT SYSTEM Heat Controller, LLC
Installation
NOTICE! Failure to remove shipping brackets from
spring-mounted compressors will cause excessive
noise, and could cause component failure due to added
vibration.
The installation of water source heat pump units and all
associated components, parts and accessories which make
up the installation shall be in accordance with the regulations
of ALL authorities having jurisdiction and MUST conform to
all applicable codes. It is the responsibility of the installing
contractor to determine and comply with ALL applicable
codes and regulations.
Removing Existing Condensing Unit (Where Applicable)
1. Pump down condensing unit. Close the liquid line service
valve of existing condensing unit and start compressor
to pump refrigerant back into compressor section. Then,
close suction service valve while compressor is still
running to trap refrigerant in outdoor section. Immediately
kill power to the condensing unit.
2. Disconnect power and low voltage and remove old
condensing unit. Cut or unbraze line set from unit.
Remove condensing unit.
3. If condensing unit is not operational or will not pump
down, refrigerant should be recovered using appropriate
equipment.
4. Replace line set, especially if upgrading system from
R-22 to R-410A refrigerant. If line set cannot be replaced,
it must be thoroughly fl ushed before installing new
compressor section. R-410A compressors use POE
oil instead of mineral oil (R-22 systems). Mineral oil is
not compatible with POE oil, and could cause system
damage if not completely fl ushed from the line set.
Indoor Compressor Section Location
The HTS indoor compressor section is not designed for
outdoor installation. Locate the unit in an INDOOR area
that allows enough space for service personnel to perform
typical maintenance or repairs without removing unit.
Units are typically installed in a mechanical room or closet.
Never install units in areas subject to freezing or where
humidity levels could cause cabinet condensation (such
as unconditioned spaces subject to 100% outside air).
Consideration should be given to access for easy removal
of service access panels. Provide suffi cient room to make
water, electrical, and line set connections.
Any access panel screws that would be diffi cult to remove
after the unit is installed should be removed prior to setting
the unit. Refer to Figure 2 for an illustration of a typical
installation. Refer to “Physical Dimensions” section for
dimensional data. Conform to the following guidelines when
selecting unit location:
1. Install the unit on a piece of rubber, neoprene or
other mounting pad material for sound isolation. The
pad should be at least 3/8” [10mm] to 1/2” [13mm] in
thickness. Extend the pad beyond all four edges of the
unit.
2. Provide adequate clearance for maintenance and
service. Do not block access panels with piping, conduit
or other materials.
3. Provide access for servicing the compressor and coils
without removing the unit.
4. Provide an unobstructed path to the unit within the closet
or mechanical room. Space should be suffi cient to allow
removal of the unit, if necessary.
5. In limited side access installations, pre-removal of the
control box side mounting screws will allow control box
removal for future servicing (R22 units only).
6. Provide access to water valves and fi ttings and
screwdriver access to the unit side panels and all
electrical connections.
Air Handler and Coil Installation
This manual specifi cally addresses the compressor section
of the system. Air handler and coil location and installation
should be according to the instructions provided with the air
handling/coil unit.