Installation guide

50O0
4500
4000
3500
z 3000
_2500
_2000
1500
1000
500
VACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM
0 1 2 3 4 5 6 7
MINUTES
A95424
Fig. 7--Deep Vacuum Graph
IEVACUATE I
IBREAK VACUUM WiTH DRY NITROGEN I
F- vq
IEVAOUATEI
IBREAKVACUUMW,THDRYNITROGENI
F- vq
IEVAOUATEI
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
[CHARGE SYSTEM I
A95425
Fig. 8--Triple Evacuation Method
The unit cabinet must have an maintem/pted or unbroken
ground to minimize personal injury if an electrical fault
should occur The ground may consist of electrical wire or
metal condnit when installed in accordance with existing
electrical codes. Failure to follow this warning can result in an
electric shock, fire, or death
(ONNE(T GROL_D AND POWER WIRES
Connect ground wire to ground connection in control box for
safety. Connect po_er wiring to contactor as shown in Fig. 9.
CONNECT CONTROL WIRING
Route 24v control wires through contlol wiring grommet and
connect leads to conhoi wiring. (See Fig. 11.)
Use No. 18 AWG color-coded, insulated (35°C minimnm) wire. If
thermostat is located more than 100 ft t'rom unit, as measured
along the contlol voltage wires, use No. 16 AWG color-coded wire
to avoid excessive voltage drop.
All wiring must be NEE Class 1 and mnst be separated fi'om
incoming power leads.
Use l?urnace tlansformer, f_n coil transformer, or accesso_ trans-
fbrmer for control power, 24vi40va minimun_.
DISCONNECT
PER N.E.C. AND/OR
LOCAL CODES
FIELD POWER
WIRING
3 PHASE ONLY
1
CONTACTOR
<?o
BLUE C
3
FIELD GROUND
WIRING @
l GROUND
LUG
A94025
Fig. 9--Line Power Connections
NOTE: Use of available 24v accessories may exceed the mini-
mum 40va power requirement. Determine total transformer load-
ing and increase the transfbmaer capacity' or split the load with an
accessory t_ansformer 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 9--Compressor Crankcase Heater
When equipped with a crankcase heater, fl/rnish power to heater a
minimum of 24 hr before starting unit To fl/mish power 1o heater
only, set fl-iermostat to OFF and close electrical disconnect to
outdoor unit.
A crankcase heater is required if re['rigerant robing is longer than
50 ft Refer 1o Application Guideline and Service Manual
Residential Split-System Air Conditioners and Heat Pumps using
Puron R; Refrigerant
Step 10--install Electrical Accessories
Refer to the indixidual instructions packaged x_ith kits or acces-
sories when installing.
Step 1 l--Start-Up
To prevent compressor damage or personal injury, observe
the fbllowing:
*Do not overcharge system with refiigerant.
*Do not operate unit in a vacuum or at negative pressure.
*Do not vent refiigerant to atmosphere. Recover during
system repair or final unit disposal.
*Do riot disable low=pressure switch.
In scroll=compressor applications:
*Dome temperatures may be hot.
To prevent personal injury wear safety glasses, protective
clothing, and gloves when handling refi'igerant arid observe
the fbllowing:
*Back=seating service valves are riot equipped with Schrader
valves. Fully back seat (counterclockwise) valve stem before
removing gage=port cap.
*Front-seating service valves are equipped with Schrader
valves,