Carrier 38EYX Manual Del Usuario página 6

Fig. 11—Phase Monitor Control
may fluctuate above or below permissible limits.
NOTE: Use copper wire only between disconnect switch and
unit.
NOTE: Install branch circuit disconnect of adequate size per
NEC to handle unit starting current. Locate disconnect within sight
from and readily accessible from unit, per Section 440-14 of NEC
or local code.
ROUTE GROUND AND POWER WIRES
Remove access panel to gain access to unit wiring. Install conduit
to knockout hole in bottom of control box. Extend power and
ground leads into control box and connect to unit contactor and
ground lug as shown on unit wiring diagram and Fig. 9. Consult
IEC 60335-1, Part 25 for additional information.
HP THERMOSTAT
24 VAC HOT R
C
24 VAC COM
W2
HEAT STAGE 2
COOL/HEAT
Y
STAGE 1
G
INDOOR FAN
O
RVS COOLING
EMERGENCY
E
*
IF AVAILABLE
HEAT
Fig. 10—Generic Wiring Diagram
(See Thermostat Installation Instructions for
wiring specific unit combinations)
A00010
6
TYPICAL HEAT
FAN COIL PUMP
R
R
C
C
*
W2
W2
*
E
Y
*
W3
G
O
A02325
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. Failure to follow this warning can result in an
electric shock, fire, or death.
CONNECT CONTROL WIRING
Remove grommet from control wiring hole in control box. Install
conduit to knockout hole in control box. Extend control wiring
leads into control box and connect to terminal board as shown on
unit wiring diagram and Fig. 10. Consult IEC 60335-1, Part 25 for
additional information.
Use No. 18 AWG color-coded, insulated (35°C minimum) wire. If
thermostat is located more than 100 ft (30 m) from unit, as
measured along the control voltage wires, use No. 16 AWG
color-coded wire to avoid excessive voltage drop.
All wiring must be NEC Class 1 (US), or 245 IEC 57 and must be
separated from incoming power leads. Wire insulation must
conform to EN 60335-2-40.
Use fan coil transformer or accessory transformer for control
power, 24v/40va minimum.
NOTE: Use of available 24v accessories may exceed the mini-
mum 40va power requirement. Determine total transformer load-
ing and increase the transformer capacity or split the load with an
accessory transformer as required.
FINAL WIRING CHECK
IMPORTANT: Check factory wiring and field wire connections
to ensure terminations are secured properly. Check wire routing to
ensure wires are not in contact with tubing, sheet metal, etc.
Step 11—Compressor Crankcase Heater
When equipped with a crankcase heater, furnish power to heater a
minimum of 24 hr before starting unit. To furnish power to heater
only, set thermostat to OFF and close electrical disconnect to
outdoor unit.