Installation guide

I EVACUATE I
IBREAKVACUUMWITH DRYNITROGENI
IEVACUATEI
IBREAK VACUUM WITH DRY NITROGEN I
[- vq
IEVACUATEI
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
[CHARGE SYSTEM ]
A95425
Fig. 8--Triple Evacuation Method
ROUTE GROUND AND POWER WIRES
Remove access panel to gain access to unit wiring Extend wires
fiom disconnect through power wiring bole provided and into unit
control box.
The unit cabinet must have an unintem/pted or unbroken
ground to minimize personal b!iury if an electrical fault
should occur. Tbe ground may consist of electlical wire or
metal conduit when installed in accordance witb existing
electrical codes. Failure to follow this warning can result in an
electIic shock, fire, or death.
(ONNECT GRO[_D AND POWER WIRES
Connect ground wire to ground connection in control box %r
safety. (onnect power wiring to contactor as shown in Fig. 9.
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
FIELD POWER 1
WIRING
FIELD GROUND
WIRING j
CONTACTOR
©
GROUND
LUG
A91056
Fig. 9--Line Power Connections
(ONNE(T (ONTROL WIRING
Route 24-v control wires through control wiring grommet and
connect leads to conhol wiring. (See Fig. 10.)
Use No. 18 AWG color-coded, insulated (35°C minimum) wire. If
thermostat is located more than 100 ft tk'om 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 (:lass 1 and must be separated from
incoming power leads
Use furnace transformer, fire coil transfbrmer, or accessory trans-
former for control power, 24-vi40-va minimmn.
NOTE: Use of available 24-v accessories may exceed the mini-
mma_ 40-va power requirement. Detem_ine total transl\_rmer load-
ing and increase the transfbm_er capacity or split the load with an
accessory tlansformer as required.
FINAL WIRING (HECK
INPORTANT: (?beck factory wiring and field wire connections
to ensure terminations are secured properly. (?beck wire routing to
ensure wires are not in contact with robing, sheet metal, etc.
Step 9--Compressor Crankcase Heater
When equipped witb a crankcase heater, fl/rnisb power to beater a
minimum of 24 br before starting unit To fl/rnish power to beater
only, set thermostat to OFF and close electrical disconnect to
outdoor unit.
A crankcase heater is required if refrigerant robing is longer tban
50 it. Refer to the Application Guideline and Service Manual
Residential Split-System Air ( onditioners and Heat Pumps Using
Puron® Refiigerant
Step 10--install Electrical Accessories
Refer to the individual instructions packaged witb 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 reti"igerant
• Do not operate unit in a vacuum or at negative pressure.
• Do not 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 bandling refi'igerant and observe
the fbllowing:
* Back seating service valves are not equipped with Schrader
valves. Fully back seat (counter clockwise) valve stem befbre
removing gage port cap.
* Front seating service valves are equipped with Schrader
valves,
Federal regulations require that you do not xent reDigerant to
the atmospbere. Recoxer during system repair or final unit
disposal
Follow these steps to properly start up the system:
1. After system is evacuated, ftdly back seat (open) liquid and
vapor service valves.
2. Unit is shipped witb valve stem(s) fiont seated (closed) and
caps installed. Replace stem caps after system is opened to
refiigerant flow (back seated). Replace caps finger-tight and
tighten with wrencb an additional 1/12 turn.
3. Close electrical disconnects to energize system.
4. Set room thermostat at desired temperatnre. Be sure set point
is below indoor ambient temperature.