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User manual Carrier, model 38BQ

Manafacture: Carrier
File size: 930.55 kb
File name: 38bq-11si~1.pdf
Language of manual:en
Free link for this manual available at the bottom of the page



manual abstract


See Fig. 1. c. Position unit so water or ice from roof will not drop directly on top of unit or in front of coil. d. Position outdoor unit to prevent prevailing winds from blowing directly thru fan and coil section in either direction. Avoid corners or pockets where snow is likely to drift. e. Consider effect of outdoor fan sound on conditioned space and adjacent occupied space. Place unit so discharge air does not blow toward windows that are less than 25 ft away. Do not locate unit under an overhang. f. Make provisions for condensate drainage and defrost water disposal. See Mounting Pad for details. is Carrier Corporation 1980 Form 38BQ-11 SI g. Roof installation method for 38BQ depends on building construction and requirements of local building codes. Ensure roof will support unit weight. See Mounting Pad for details. h. Ensure mounting pad or platform will support unit without transmitting vibration. See Table 2 for unit weight. j. Maximum length of refrigerant piping allowed is 100 feet. See Table 1 for maximum vertical distance between indoor and outdoor sections. Table 1 — Carrier-Approved 38BQ008 System OUTDOOR UNIT 38BQ INDOOR Fan Coil HEIGHT (ft) Indoor Unit Above Below Outdoor Unit 008 40BA009 30 60 Table 2 — Physical Data UNIT 38BQ008 < OPERATING WT (lb) 590 REFRIGERANT R-22 Operating Charge (lb)* 19 7 Factory Holding Charge (lb)* 2.0 COMPRESSOR 06DA818 Cylinders 4 Rpm 1750 Oil Charge (pts) 7 OUTDOOR FANS Discharge Number 1 Rpm 1075 Blade Diameter (in.) 22 Motor Hp 1/2 Cfm 5000 OUTDOOR COIL 4-Row, 12 Fins/in Face Area (sq ft) 12 46 *Based on approximately 25 ft of interconnecting piping Unit supplied with factory holding charge MOUNTING PAD Stpp 3 — On the Ground: Mount Unit on a Solid Level Concrete Pad. See Fig. 2 for pad dimensions. Ensure pad does not obstruct coil slots in unit basepan. (Slots drain water during heating cycle.) Construct pad at least 6 in. thick to provide clearance under basepan coil slots for drainage and ice buildup. In areas where prolonged subfreezing temperatures or drifting or heavy snows occur, increase clearance to 12 to 18 inches. If climatic conditions dictate, construct an angle iron frame to support unit 12 to 18 in. off concrete pad. Cross angle of frame must not obstruct basepan coil slots. Extend a gravel apron around pad for condensate and defrost water drainage field. Step 4 — On the Roof: Mount Unit on a Level Platform or Frame. Unit must be elevated for proper clearance as described under ground installation above. Roof design and water drainage must be planned to prevent unit from setting in water. Flash all roof openings to prevent leaks. Fig. 2 — 38BQ008 Base Dimensions PIPING CONNECTIONS The 38BQ units can be connected to R-22 indoor units by using field-supplied tubing of refrigerant grade. Refer to Fig. 1 for unit connection sizes. Connection Recommendations — Do not use damaged or contaminated tubing. Do not use less than 10 ft of liquid line. Bend or coil to use up excess tubing. Step 5 — Extend Refrigerant Liquid and Suction Lines into 38BQ heat pump where indicated on Fig. 1. Step 6 — Connect Refrigerant Lines to Fittings on Unit Suction and Liquid Service Valves — Refer to Fig. 3 and proceed as follows: 1. Ensure compressor discharge service valve and liquid line valve are closed. 2. Loosen the 1/2-in. flare nut on the liquid valve to bleed the oil and refrigerant from the runaround loop. Completely unscrew the flare nut and bend the tube away. 3. Open suction valve momentarily to blow any trapped oil out of loop. 4. Unsweat and remove the run-around loop at fitting. 5. Connect the liquid line from the indoor section to the 112-in. male flare liquid line valve connection. 6. Connect suction line to indoor section and extend line to outdoor unit. Purge indoor coil and tubing system (steps 7, 8 and 9) before connecting suction line to outdoor unit. CCfttPft END OP 2 -$ < * ■fc ^ .* U&fi- 3AÎU 3#?$: co?*c8£t£ .< >r-y< mmmmmmmr ill / indoor fan relay, shipped with 40BA009 unit, is to be mounted near the Indoor Section for control of the indoor fan motor. SUCTION VALVE GAGE PLUG SUCTION CONNECTION it! RUN-AROUND LOOP Fig. 3 — Typical Component Arrangement 7. Connect a cylinder of refrigerant to the gage port on either the liquid line valve or the compressor discharge service valve. 8. Open service valve on refrigerant cylinder. 9. Open the liquid line valve on the outdoor section approximately a quarter turn for 10 to 15 seconds to purge the air from liquid line, indoor coil and suction line. 10. Close all valves and remove refrigerant cylinder. 11. Open compressor suction service valve midway to purge the suction line of the outdoor section. 12. Remove the suction valve gage plug to provide a pressure relief open for soldering. 13. Solderthe 1-1/8 in. suction linefrom the indoor section to the outdoor unit suction connection where the run-around loop was removed. 14. Remove t...


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