3
MAKE REFRIGERANT TUBING CONNECTIONS
Outdoor units may be connected to indoor section using accessory
tubing package or field supplied refrigerant--grade tubing of correct
size and condition. For tubing requirements beyond 80 ft (24.38
m), consult Residential Split System Long--Line Application
Guideline. Connect tubing to fittings on outdoor unit vapor and
liquid service lines. (See Table 1.)
If refrigerant tubes or the indoor coil are exposed to atmospheric
conditions for longer than 5 minutes they must be evacuated to 500
microns to eliminate contamination and moisture in system.
Table 1—Refrigerant Connections and Recommended Liquid
and Vapor Tube Diameters (in.)
UNIT SIZE
Liquid
Rated Vapor*
Connect
Diameter
Tube
Diameter
Connect
Diameter
Tube
Diameter
018, 024, 030
3/8
3/8
3/4
3/4
036, 042, 048
7/8
7/8
060
7/8
1---1/8
* Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for
performance data when using different size and length linesets.
Notes
:
1. Do not apply capillary tube or fixed orifice indoor coils to these units.
2. For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m)
horizontal or 35 ft. (10.7 m) vertical differential 250 ft. (76.2 m) Total
Equivalent Length), refer to the Residential Piping and Longline Guide
line--- Air Conditioners and Heat Pumps using Puron refrigerant.
OUTDOOR UNIT CONNECTED TO FACTORY
APPROVED INDOOR UNIT
Outdoor unit contains correct system refrigerant charge for
operation with indoor unit of same size when connected by 15 ft
(4.57 m) of field supplied or factory accessory tubing. Check
refrigerant charge for maximum efficiency.
SWEAT CONNECTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit component
damage.
Service valves must be wrapped while brazing in a heat
sink material, such as a wet cloth.
CAUTION
!
Use refrigerant grade tubing. Service valves are closed from factory
and ready for brazing. After wrapping service valve with a wet
cloth, tubing set can be brazed to service valve using industry
accepted methods and materials. Consult local code requirements.
Refrigerant tubing and indoor coil are now ready for leak testing.
This check should include all field and factory joints.
MAKE ELECTRICAL CONNECTIONS
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Do not supply power to unit with compressor terminal box
cover removed.
!
WARNING
Be sure field wiring complies with local and national fire, safety,
and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company for correction of
improper voltage. See unit rating plate for recommended circuit
protection device.
NOTE
: Operation of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit rating plate. Do not
install unit in system where voltage or phase imbalance (3 phase)
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.
ROUTE GROUND AND POWER WIRES
Remove access panel to gain access to unit wiring. Extend wires
from disconnect through power wiring hole provided and into unit
control box.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
The unit cabinet must have an uninterrupted or unbroken
ground. The ground may consist of electrical wire or metal
conduit when installed in accordance with existing electrical
codes.
!
WARNING
CONNECT GROUND AND POWER WIRES
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 4
CONTACTOR
L1
L1
L3
L3
L2/N
L2/N
GROUND
LUG
DISCONNECT PER
IEC AND/OR
LOCAL CODES
FIELD POWER
WIRING
GND
N FOR 1-PHASE ONLY
3-PHASE ONLY
A03226
Fig. 4
---
Line Power Connections
CONNECT CONTROL WIRING
Route 24v control wires through control wiring grommet and
connect leads to control wiring. (See Fig. 5.)
Use No. 18 AWG color coded, insulated (35
_
C minimum) wire. If
thermostat is located more than 100 ft from unit, as measured along
the control voltage wires, use No. 16 AWG color coded wire to
avoid excessive voltage drop.
Use furnace transformer, fan coil transformer, or accessory
transformer for control power, 24v/40va minimum.
NOTE
:
Use of available 24v accessories may exceed the
minimum 40va power requirement. Determine total transformer
loading and increase the transformer capacity or split the load with
an accessory transformer as required.