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18-BC55D1-2
Pumps
4TWX6
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT -- This Document is customer property and is to remain with this unit. Please return to service information
pack upon completion of work.
These instructions do not cover all variations in
systems nor provide for every possible contingency to
be met in connection with installation. All phases of
UNiT CONTAINS R-410A REFRIGERANT!
this installation must comply with NATIONAL, STATE
AND
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|nsta||er's Guide The indoor end of the recommended refrigerant line sets may BASEPAN TAB REMOVAL be straight or with a 90 degree bend, depending upon @ situation requirements. This should be thoroughly checked out before ordering refrigerant line sets. The gas line must always be insulated. in scroll compressor applications, dome temperatures may be hot. Do not touch top of compressor, may cause minor to severe burning. The units are factory charged with the system charge required when using fi
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|nsta||er's Guide 7. Use a Dry Nitrogen Purge and Brazing Alloy without GAS LiNE SERVICE VALVE flux when brazing the field line to the copper factory © connection. Flow dry nitrogen into either valve pressure CAP _ _ 1/4 TURN ONLY COUNTERCLOCKWISE tap port, thru the tubing and out the other port while FOR FULL OPEN I .... POSITION brazing. 8. Braze using accepted good brazing techniques. OF VALVE LEAK CHECK ........ F"_ STE" IMPORTANT: PRESSURE TAP PORT J Replace pressure tap port valve core bef
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|nstaI|er's Guide 10. Replace liquid service pressure tap port cap and valve serves to sense outdoor coil temperature for termination of stem cap. These caps MUST BE REPLACED to the defrost cycle. prevent leaks. Replace valve stem and pressure tap cap FAULT IDENTIFICATION finger tight, then tighten an additional 1/6 turn. A fault condition is indicated by the flashing light on the 11. The gas valve can now be opened. Open the gas valve by defrost control inside the heat pump control box. removin
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|nsta||er's Guide H. OPERATIONAL AND CHECKOUT components, provisions are made for a field installed start kit accessory. When adding an accessory, follow the instructions PROCEDURES provided with the kit. Final phases of this installation are the unit Operational and Checkout Procedures which are found in this instruction on K. OUTDOOR THERMOSTAT page 8. To obtain proper performance, all units must be An outdoor thermostat TAYSTAT250A may be field installed. operated and charge adjustments made
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|nsta||er's Guide 4TWX6 OUTLINE DRAWING NOTE: ALL DIMENSIONS ARE IN IVllVl (INCHES). SERVICE PANEL...................................... ELECIRICA[ AND REFRIGERANF COMPONENTCLEARANCPS PER PREVAILING CODES UNIT SNOULD BE PLACED SO ROOF RUNOFF WAIER DOES NOT POUR D}RECIIY ON UNIT, AND SNOUIB BE AT LEAST 305 (12") FROM WALL AND ALL SURROUNDIN6 SHRUBBERY ON TWO SIDES OTNER TWO SIDES UNRESTRICTED 222 (I/8) DIA lOW VOLTAGE 286 (ll/8} DIA dO WITH 22? (7/8) DIA HOLF }N CONTROL BOX BOIIOM FOR ELECIRICAL
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|nstal|er's Guide MOUNTING HOLE LOCATION NOTE: ALL DIMENSIONS ARE IN MM (INCHES). _DRIII 4 P[ /.,¢ES }}!_ (i5 i9) 22i (869) .......................................... ,82 ( 5 99) ...................................... 99 ( ? } 5l/) 310 ([2.20} BASE 3 158 (6.24) _DR!LL 4 PLACES 795 ( .28 717 (28.24) T 317 (12.48) 599 (23.58) 727 (28.64) .......................................................................................................................... NOTE: For model base size, BASE 4 FromD
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|nsta||er's Guide CHECKOUT PROCEDURE After installation has been completed, it is recommended that the entire system be checked against the following list: ] 1. Refrigerant Line, Leak checked .................................. [ 8. Supply registers and return grilles open and unobstructed ................................................................ [ ] ] 2. Suction Lines and Fittings properly insulated ........... [ 9. Return air filter installed ............................................
