13
2. Remove the plastic cap from the liquid and suction service
valve on the heat pump outdoor unit and assemble the
heating piston and piston cap supplied with the outdoor unit
as shown in Fig. 26.
*
A07407
Fig. 26 – Accurator (bypass type)
Metering Device Components
NOTE
:
The Teflon seal on the piston should point towards the
liquid service valve. The size of the factory supplied piston
might have to be adjusted for long line applications (over 80 ft
/24.4 m). Refer to the Residential Long Line Application Guide
for additional information.
3. Attach the flare end of the filter drier assembly to the piston
cap (see Fig. 25).
4. Connect the field supplied line set to the filter drier
assembly and to the suction valve.
5. Insulate any exposed areas between filter drier and liquid
valve.
COMPLETE OUTDOOR POWER AND
CONTROL WIRING
!
WARNING
Failure to follow this warning could result in personal injury or
death.
The unit cabinet must have an uninterrupted or unbroken
ground to minimize personal injury if an electrical fault should
occur. The ground may consist of electrical wire or metal
conduit when installed in accordance with existing electrical
codes.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Unit failure as a result of operation on improper line voltage or
excessive phase imbalance constitutes abuse and may cause
damage to electrical components. Such operation could void
any applicable manufacturer warranty.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before performing service or maintenance, be sure indoor
unit main power switch is turned OFF and indoor blower has
stopped.
Lock out and tag switch with a suitable warning label.
Power Wiring
NOTE
: The indoor and outdoor units are powered separately
1. Mount indoor and outdoor power disconnect. The units are
factory wired for the voltage shown on the unit nameplates.
The fused disconnect switch must be provided within sight of
the unit, readily accessible, but out of reach of children.
Provisions for locking the disconnect switch on the OFF
(open) position is advisable. The disconnect switch must
comply with NEC and local codes. Protect the unit and wiring
using only the recommended fuse/circuit breaker size (see
Tables 17 thru 20).
2. Run power wiring from electric panel to disconnect per
NEC and local codes.
3. Run power wiring from the disconnect switch to indoor and
outdoor units. Use only minimum 75
_
C copper conductors
between the disconnect switch and the unit for field power
connection.
4. Route the field power wires through the conduit connection
opening in the unit side panel and connect in junction box
as shown in Fig 27 for outdoor units and the strain relief
bracket section for indoor units. The units and power wiring
must be grounded.
BLK
BLK
SINGLE-PHASE UNIT
GROUNDING LUG
SINGLE-PHASE
CONN TO
DISCONNECT
PER NEC
BLK
BLU
YEL
GROUNDING LUG
THREE-PHASE
CONN TO
DISCONNECT
PER NEC
THREE-PHASE UNIT
GROUND LEAD
GROUND LEAD
LEGEND
NEC -- National Electrical Code
-- Splice (field)
Field Wiring
Factory Wiring
A08251
Fig. 27 – Line Power Connections
NOTE
:
Operating unit on improper line voltage constitutes
abuse and may affect the manufacturer’s warranty. DO NOT
install unit in a system where voltage may fluctuate above or
below permissible limits.
