Installation guide

A/C Typical
THERMOSTAT FURNACE
g4VACHOTE]------G --
El-- 4Z}-
24 VAC COM ...... _
HEAT STAGE 1 _ .... --_ •,"_.
m--r
COOLSTAGE ....
INOOORFANEl------G
AiR
CONDITIONER
A/C TypicN AI R
THERMOSTAT FAN COIL CONDiTiONER
24 VAC HOT _--.
24 VAC COM D"
HEAT STAGE 1 [_
COOL STAGE 1
_NDOOR FAN D"
LEGEND
24-v FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
'_ CONTACTOR
A02626
A97368
Fig. 6 - Generic Wiring Diagrams
(See Thermostat Installation Instruction
for specific unit combinations)
PURON@ (R-410A) REFRIGERANT QUICK REFERENCE GUIDE
• Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement
components are designed to operate with Puron refrigerant
• Puron refrigerant cylinders are rose colored.
• Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
• Puron refrigerant systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose
when charging into suction line with compressor operating
• Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low-side retard.
• Use hoses with 700 psig service pressure rating.
• Leak detectors should be designed to detect HFC refrigerant.
• Puron refrigerant, as with other HFCs, is only compatible with POE oils.
• Vacuum pumps will not remove moisture from oil.
• Do not use liquid-line filter driers with rated working pressures less than 600 psig.
• Do not leave Puron suction line filter driers in line longer than 72 hours.
• Do not install a suction-line filter drier in liquid line.
• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
• POE oils may cause damage to certain plastics and roofing materials.
• Wrap all filter driers and service valves with wet cloth when brazing.
• A factory approved liquid-line filter drier is required on every unit.
• Do NOT use an R-22 TXV.
• If indoor unit is equipped with an R-22 TXV or piston metering device, it must be changed to a hard shutoff Puron TXV.
• Never open system to atmosphere while it is under a vacuum.
• When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter driers.
Evacuate to 500 microns prior to recharging.
• Do not vent Puron refrigerant into the atmosphere.
• Do not use capillary tube coils.
• Observe all warnings, cautions, and bold text.
• All indoor coils must be installed with a hard shutoff Puron TXV metering device.
Copyright 2007 Carrier Corp • 7310 W Morris St • Indianapolis, IN 46231 Printed in USA. Edition Date: 12/07
Manufacturer reserves the right to change_ at any time_ specifications and designs without notice and without obligations.
d
Catalog No: 24ABA-2Sl
Replaces: 24ABA- 1SI