Carrier 25VNA Instruction Manual

Installation InstructionsNOTE: Read the entire instruction manual before starting the installation,TABLE OF CONTENTSPAGE NO.SAFETY CONSIDERATIONS ...

Thecontrolboardaccumulatescompressorruntime. As theaccumulated run time approaches the selected defrost interval time,the control board monitors the c

Al114025VNA024/036 Heating Pressure check Cha_ (Psig)Indoor Temperature (°F)OD DB60 70 80(°F)High Low High Low High Low60 324 121 360 120 407 12150 29

MAJOR COMPONENTSVariable speed Control BoardThe HP control board controls the following functions:• Compressor speed• Contactor operation• Outdoor fan

Brown- Out ProtectionIf the line voltage is less than 187v for at least 4 seconds, thecontactor and fan relay are de-energized. Compressor and fanoper

PRESSURETRANSDUCER(SPT)ACCUMULATOR TUBESUCTION THERMISTORREVERSING VALVESUCTION SERVICE VALVEAl1103Fig. 17 - Suction Thermistor (OST) Attachment(On Su

t iiii... ; ._1... ,,Utili:cy Interface** FROM UTILITY PROVIDERFig. 19 - Variable Speed Control Boardwith optional Utility RelayAl1381t _...,

Fan Coi:IOF25VHAThenl_ostatmEmMmOmUTC "-LSOFig. 21 - Variable Speed Unit Connected to a Conventional Dual Fuel Thermostat in an Emergency ModeAl1

FAULT DESCRIPTION SENT TO Ul RESET TIME(minutes)-- ON, no flash- - 1, pause1 (2 sec ON), longer pause (1second OFF)Communications Loss NAInvalid Model

FINAL CHECKSIMPORTANT: IMPORTANT: Before leaving job, besure to do the following:1. Ensure that all wiring is routed away from tubingand sheet metal e

Information in these installation instructions pertains only to25VNA series units.SAFETY CONSIDERATIONSImproper installation, adjustment, alteration,

Installation RecommendationsIn some cases noise in the living area has been traced to gaspulsations from improper installation of equipment.1. Locate

Step 2 -- Install on a Solid, Level Mounting PadIf conditions or local codes require the unit be attached to pad, tiedown bolts should be used and fas

Step 7 -- Make Piping ConnectionsPERSONAL INJURY AND UNIT DAMAGEHAZARDFailure to follow this warning could result in personal injury ordeath.Relieve p

Outdoor Unit Connected to Factory-Approved IndoorUnitOutdoor unit contains correct system refrigerant charge foroperation with factory-approved, AHRI-

ffJOII:omLEAK INVACUUM TIGHTTOO WETTIGHTDRY SYSTEM2 3 4 5 6MINUTESFig. 7 - Deep Vacuum GraphA95424Final Tubing CheckIMPORTANT: Check to be certain fac

Step 10 -- Install AccessoriesThere are no refrigeration circuit or electrical accessories requiredor available for installation within the unit. Exte

Crankcase Heater OperationThis unit has an internal crankcase heater that will be energizedduring the off cycle and is intelligently demanded by the s