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428 01 9700 03
INSTALLATION
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal
injury or equipment damage.
R
−
410A refrigerant systems operate at higher
pressures than standard R
−
22 systems. Do not use
R
−
22 service equipment or components on R
−
410A
refrigerant equipment.
PERSONAL INJURY AND EQUIPMENT DAMAGE
HAZARD
Failure to follow this caution may result in personal
injury and / or equipment damage.
DO NOT
operate the unit without a filter or with grille
removed.
CAUTION
!
Step 1
—
Complete Pre
−
Installation Checks
Unpack Unit
Move the unit to final location. Remove unit from carton,
being careful not to damage service valves and grilles.
Inspect Shipment
File a claim with the shipping company if shipment is
damaged or incomplete. Check the unit nameplates to
ensure units match job requirements.
Consider System Requirements
Consult local building codes and NEC for special installation
requirements.
Allow sufficient space for airflow clearance, wiring,
refrigerant piping, and servicing unit. See Figure 3.
Locate unit so that condenser airflow is unrestricted on both
sides. Refer to Figure 3.
Unit may be mounted on a level pad directly on base legs or
mounted on raised pads at support points. See Figure 3 for
center of gravity.
Matching the Heat Pump to an Indoor Unit
The HC4H3 ducted heat pump units can be matched to
corresponding indoor units. The HC4H3 unit can be
matched with underceiling and residential fan coils and
evaporator coils. Refer to separate indoor unit literature for
more information.
Expansion Device
−
Cooling Mode
A hard shutoff, thermostatic expansion valve (TXV) is
required at the indoor section of the system for proper
operation of these products. If the indoor section of the
system is not equipped with a hard shutoff TXV, refer to
Spec Sheet for the correct TXV kit to be installed. Follow
the instructions in the kit for proper installation.
Check AccuRater Metering Device
−
Heating Mode
The correct AccuRater (bypass type) refrigerant control is
required for system capacity optimization. An AccuRater
device with field
−
replaceable piston is supplied with the
outdoor unit (see Figure 2).
Do not
interchange components between the AccuRater
device types. Matching of outdoor unit with indoor unit may
require field replacement of piston. Replace piston, if
required, before connecting refrigerant lines. See Figure 2.
Piston replacement instructions are included in the indoor
unit installation instructions. After system installation is
complete, see the Refrigerant Charging section in this
document to check and/or adjust refrigerant charge.
A07407b
Figure 2
-
AccuRater (bypass type)
Metering Device Components