Carrier 28QX- Manuals

All water supply lines leaving storage must be more than 6 in from bottom of tank but no closer than 2 ft from lowest water level Fig. 3 — Typical Water or Glycol — Solaround System Schematic

Table 2 — Accu Rater Refrigerant Control Piston Data INDOOR OUTDOOR COIL SECTION INDOOR COIL COMPR SECTION Model Required AccuRater Model Required AccuRater Piston (no.) Piston (no.) 38HQÌ27 38HQ945 3 28QX036 5 38HQ134 38HQ940 4 28QXÓ36 6 38HQ140 38HQ960 s 28QX042 3 '■'Standard factory-installed Acc...

INSULATE STORAGE TANK - Prior to making the tank installation, consider that the tank will have to be insulated. The insulation will have to be placed all around the tank, including underneath it. This can be accomplished by either placing an insulating pad beneath the tank (one which can carry the ...

PRESSURE R£U£F mVE ÎSI.VCOL SlfS^MS OWW ' EfOD. RETliRN UNE SETORfi i: !•. ■ 'i 1 ~~ir supply „2^00 RETUSti LSŒ R£T«i»t ' / '/ / ' / / NCfTE; ^KR■ RECWitttENOEO DUE TO OECREASED EPFICSR« HOWEVER ROOP /WEA L«frAT50NS MAY liECESStTSTE TUB ARRANSEMcRT. Fig. 5 — Collector Arrangements dimensions. Comple...

Fig. 7 — Typical Collector Mounting Frame MOUNT THE COLLECTORS on completed frame or sleepers. Lasten in place with four mounting clips supplied with each collector. Use 2 clips on each end of the collector. See Fig. 8. Each clip has a .437-in. diameter hole to accept a field supplied mounting screw...

I N S T A L L FLASHING, INSULATION AND FRAME ENCLOSURE after system has been leak checked. Completely insulate piping with 3/4-in. closed cell flexible rubber insulation such as Armaflex or Rubatex. Eiberglass insulation may also be used, however, any non-rubber insulator must be waterproofed. Do no...

travels to the collectors. From here the loop goes back to the storage tank thru a 2-1/8 in. pipe. This down pipe terminates above the highest water level in the storage tank and must have all horizontal runs of tubing pitched downward a minimum of 1/4-in ./foot. A pitch of 3/8-in./ft or l/2-in./ft ...

LOCATE AND INSTALL THERMISTOR SEN­SORS AND AQUASTAT BULBS - Located in the low voltage terminal block compartment of the control box are 2 thermistor sensors and 3 bulb wells, Fig. 18. Two of the bulb wells are to be used with the aquastat bulbs located on the control box in pump package, Fig. 12. T...

# Any field installed run of horizontal tubing in the collector loop must be pitched downward a minimum of 1/4-in. per foot. A pitch greater than 1/4-in./ft, such as 3/8-in./ft or 1/2-in./ft, is accept­ able and better than 1/4-in./ft. This pitch require­ ment is critical to the installation because...

The pipe diameters and the allowable lengths for this loop are listed below. ALLOWABLE PIPE LENGTHS Pipe O.D. (in.) Maximum Equivalent Length (ft) 7/8 1 1 - 1 / 8 25 50 100 A value of 8 equivalent ft should be used for the pipe length inside the glycol pump package. It is advisable to terminate the ...

If it is necessary, the aquastats may be removed from the control box and mounted close to the storage tank. If this approach is taken, 14 gauge wire should be used to connect the aquastat to the appropriate wires out of the control box. Thermistor Sensor Mounting — Mount sensors so that good therma...

Step 6 — Make Electrical Connections — Field wiring must comply with local and national fire, safety and electrical codes. Voltage to units must be within ± 10% of voltage indicated on nameplate. Operation of unit on improper line voltage constitutes abuse and is not covered by Carrier warranty. Ele...

# INITIAL START-UP Follow this start-up procedure since a proper start-up is essential to efficient and reliable system operation. Review Start-Up data in 38HQ heat pump Installation Instructions and Refrigerant Charging on pg 27 of this publication. Plain Water System Start-Up — At this stage of th...

19. This will prevent booster pump from filling storage tank. Open air bleed valve on top of 28QX coil, start pump and fill piping loop with water. If 28QX is not at highest point in the water loop, install an air bleed valve at high point in loop to purge air. After loop is filled, remove booster p...

• The collector circuit pump is operated thru a relay (Rh) which is activated by the differential controller. The differential controller monitors the difference in thermistor temperatures (AT = Tc — Ts). When this AT reaches 20 F, Rg is energized, and the collector pump runs (also the heat exchange...

leaving water header in approximately 60- second intervals. Using this method will remove most of water in coil circuits. d. See fan section, electric heater, or the compressor section Installation, Start-Up and Service Instructions for scheduled maintenance. STORAGE TANK e. As specified in the Star...

Fig. 33 - 38HQ134/38HQ940 with 28QX036 Cooling Cycle Charging Chart Fig. 35 - 38HQ140/38HQ960 with 28QX042 Cooling Cycle Charging Chart 20 30 40 50 60 SUCTION PRESSURE AT SCHRADER VALVE-PSIG 70 Fig. 34 - 38HQ134/38HQ940 with 28QX036 Heating Cycle Operation Check Chart Fig. 36 - 38HQ140/38HQ960 with ...