13
!WARNING
ELECTRICALSHOCK HAZARD
Failureto follow thiswarning could result in personalinjury or
death.
Beforeperforming service or maintenance,be sure indoor unit
main power switch is turned OFF and indoor blower has
stopped.
Lock out and tag switch with suitable warning label.
PowerWiring
1. Mount outdoor power disconnect.The unit is factory wired
forthe voltage shown on the unit nameplate. The fuseddis-
connect switchmust be provided within sight of the unit,
readily accessible, but out of reach of child ren. Provisions
for lockingthe disconnect switch on theOFF (open) posi-
tion is advisable.The disconnect switchmust comply with
NECand local codes. Protectthe unit and wiring usingonly
the recommended fuse/circuit breaker size. See Table 10 ..
2. Run power wiringfrom main box to disconnect per NEC
and local codes.
3. Run power wiring fromthe disconnect switch to outdoor
unit. Useonly minimum 60_C copper conductors between
the disconnectswitch and the unit forfield power connec-
tion.
4. Route the field powerwires through the conduit connection
openingin the unit side panel and connect in junction box
as shown in Fig 17.The unit 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.17 --Line Power Connections
NOTE:Operating unit on improperline voltage constitutes
abuse and could affect Carrier w arranty. DO NOT install unit
in a system where voltage may fluctuate above or below
permissible limits.
Control Wiring
The control circuit is 24 volts AC (minimum 40VA) supplied from
theindoor unit.
1. Make sure you have enough control wiresto cover the dis-
tancebetween the indoor and outdoor unit.
2. Route one end of the control wiringthrough the opening
provided in the unitside panel and connect to the control
terminal strip using either Fig. 18 for 38HDR units and Fig.
19for 38QRR units.
Y1
A09603
Fig.18 -- 38HDR TypicalControl Circuit Connections
A09509
Fig.19 -- 38QRR TypicalControl Circuit Connections
NOTE: U se No. 18 AWG color--coded, insulated (35_C minimum) wire.If the distance between the indoor and outdoor unit is greaterthan
100ft. (30.5 m), as measuredalong the control voltagewires, use No.16 AWG color--codedwire to avoidexcessive voltagedrop.
40QAC/38HDR -- 40QAQ/38QR
R