Johnson Controls AHR18B3XH21, Installation Manual

Page 1: ...els may be used for cooling or heat pump operation with or without electric heat Top and side power wiring and control wiring accessible screw termi nals for control wiring easy to install drain connections and electric heaters all combine to make the installation easy and minimize installa tion cost Electric heat kits are available as field installed accessories Single phase and 3 phase kits are ...

Page 2: ...ons cover minimum requirements and conform to existing national standards and safety codes In some instances these instructions exceed certain local codes and ordinances especially those who have not kept up with changing residential and non HUD modular home construction practices These instruc tions are required as a minimum for a safe installation INSPECTION As soon as a unit is received it shou...

Page 3: ...m 36 from front of unit recommended for blower motor coil replacement 3 Condensate drain lines routed to clear filter and panel access 4 Filter removal minimum 36 recommended 5 The ductwork and plenum connected to this unit are designed for zero clearance to combustible materials 6 A combustible floor base accessory is available for downflow appli cations of this unit if required by local code FIG...

Page 4: ... vertical A coil drain pan If installing the unit in the upflow or downflow position no modifica tion is necessary For units to be installed in the horizontal position the condensate deflector needs to be removed from the vertical drain pan and placed on the horizontal drain pan Remove the condensate deflector and the S clips that attach it to the vertical drain pan Relocate the deflector and S cl...

Page 5: ...ound may be a problem sound absorbing glass fiber should be used inside the duct Insulation of duct work is a must where it runs through an unheated space during the heating season or through an uncooled space during the cooling season The use of a vapor barrier is recommended to pre vent absorption of moisture from the surrounding air into the insulation Duct work should be fabricated and install...

Page 6: ...ay be used A 1 filter access rack has been built into the unit Remove filter access cover shown Install proper size filter Standard 1 size permanent or throw away filter may be used or permanent washable filters are avail able using model numbers 1PF0601 602 or 603BK See Table 2 for fil ter size TXV OR ORIFICE METERING DEVICES All air handlers are shipped with flex coils meaning that the evaporato...

Page 7: ...t to any pressure it is not necessary to use Schedule 40 pipe for drain lines FIGURE 10 TXV FIGURE 11 Proper Bulb Location COIL UNDER PRESSURE Relieve pressure by depressing schrader core The coil should be open to the air for no more than 2 minutes to keep moisture and contaminates from entering the system If the coil can not be brazed into the refrigeration system in that time the ends should be...

Page 8: ...ing to air handlers is not approved If aluminum conductors are present all applicable local and national codes must be followed when converting from aluminum to copper con ductors prior to connection to the air handler If wire other than uncoated non plated 75 C ambient copper wire is used consult applicable tables of the National Electric Code ANSI NFPA 70 The chosen conductor and connections all...

Page 9: ...cle of a heat pump Standard wiring will only bring on the first stage of electric heat during defrost See Table 5 for additional information on heat during defrost cycle NOTICE NOTICE FIGURE 14 Blower Speed Connections FACTORY WIRED TO TRANSFORMER FACTORY WIRED TO FAN MOTOR RELAY TERMINAL ON CONTROL BOARD R U P R U P HIGH MED LOW GND 230 VOLT BLOWER MOTOR PSC STANDARD MOTOR CAP N R B BLK TABLE 2 P...

Page 10: ...ABLE 5 ELECTRIC HEAT PERFORMANCE DATA 208 230 1 60 208 230 3 60 Heater Models1 2 1 0 1 0 no circuit breaker OR 1 with circuit breaker 2 1 2 1 with circuit breaker no breaker jumper bar OR 2 with circuit breaker breaker jumper bar Nominal kW 240V Total Heat kW Staging kW MBH W1 Only W1 W2 208V 230V 208V 230V 208V 230V 208V 230V 1PH 6HK 0 1 6500206 2 4 1 8 2 2 6 2 7 5 1 8 2 2 1 8 2 2 6HK 0 1 6500506...

Page 11: ...500806 32 0 36 4 41 8 40 45 8 8 6HK 0 1 6501006 40 0 45 1 51 8 50 60 8 6 6HK 1 2 6501306 52 0 58 1 66 8 60 70 6 4 6HK 1 2 6501506 60 0 66 8 76 8 70 80 4 4 AHR29C AHR34C 6HK 0 1 6500206 10 0 13 8 15 4 15 20 12 12 6HK 0 1 6500506 20 0 24 6 27 9 25 30 10 10 6HK 0 1 6500806 32 0 37 6 42 9 40 45 8 8 6HK 0 1 6501006 40 0 46 3 52 9 50 60 6 6 6HK 1 2 6501306 52 0 59 3 67 9 60 70 6 4 6HK 1 2 6501506 60 0 6...

Page 12: ...25 60 50 25 6 6 10 6 8 10 1 MOP Maximum Overcurrent Protection device must be HACR type circuit breaker or time delay fuse 2 Stated sizes are for 75 C copper wire only If wire other than non plated 75 C ambient copper wire is used consult applicable tables of the NEC and local codes 3 1st Circuit includes the blower motor amps TABLE 8 ELECTRICAL DATA FOR SINGLE SOURCE POWER SUPPLY 208 230 3 60 Air...

Page 13: ...214 1177 1136 1071 1019 951 828 Medium 705 684 661 592 548 404 266 Low 534 512 460 394 261 167 125 AHR24B High 995 970 935 900 925 795 645 Medium 820 810 780 745 695 545 485 Low 715 695 640 405 370 375 220 AHR29C High 1605 1548 1486 1420 1356 1159 913 Medium 981 960 921 815 756 697 614 Low 769 717 654 561 510 451 389 AHR30B High 1380 1315 1245 1160 1075 990 885 Medium 1060 1040 1005 955 890 860 82...

Page 14: ... 1068 998 909 813 735 Low 887 861 792 695 649 576 486 AHR30B High 1450 1380 1300 1215 1130 1030 910 Medium 1330 1280 1205 1135 1050 975 780 Low 1160 1120 1065 1005 930 825 635 AHR34C High 1579 1511 1399 1273 1145 1068 978 Medium 1108 1057 987 924 849 770 703 Low 849 802 756 712 630 527 170 AHR36B High 1470 1390 1325 1245 1155 1045 880 Medium 1325 1265 1205 1125 1025 965 840 Low 1115 1075 1025 950 ...

Page 15: ...1053681 UIM B 0514 Johnson Controls Unitary Products 15 SECTION XI WIRING DIAGRAM FIGURE 15 Wiring Diagram PSC Single Phase Heat Kits ...

Page 16: ...ENT CODES GND EQUIPMENT GROUND FL FUSIBLE LINK HE HEATING ELEMENT LS LIMIT SWITCH REL RELAY FIELD POWER WIRING 208 230V FACTORY WIRING 208 230V FACTORY WIRING LOW VOLTAGE L1 L2 L3 L1 L2 L3 GND GND GND GND L1 L2 L3 L1 L2 L3 REL1 REL2 REL3 REL4 REL5 REL6 HE1 HE6 HE5 HE4 HE3 HE2 FL FL FL FL FL FL REL1 REL2 REL3 HE1 HE3 HE2 FL FL FL REL1 REL2 REL3 REL4 REL5 REL6 HE1 HE6 HE5 HE4 HE3 HE2 FL FL FL FL FL ...

Page 17: ...1053681 UIM B 0514 Johnson Controls Unitary Products 17 SECTION XII TYPICAL THERMOSTAT CONNECTIONS FIGURE 17 Typical Wiring Diagram PSC ...

Page 18: ...1053681 UIM B 0514 18 Johnson Controls Unitary Products NOTES ...

Page 19: ...r dry bulb temperature Return air dry bulb temperature Temperature drop 1 2 3 4 5 Low Medium Low Medium Medium High High A B C D Outside air dry bulb temperature Return air wet bulb temperature Supply air wet bulb temperature Return static inches of water column Electrical Connections Inspection Complete all that apply Continued on next Page ECM X 13 PSC A B C D Low voltage value between R and C a...

Page 20: ... noting and correcting any problems Operate the unit through cooling cycles from the thermostat noting and correcting any problems Operate the unit through mechanical heating cycles from the thermostat noting and correcting any problems Operate the unit through emergency heating cycles from the thermostat noting and correcting any problems Job site has been cleaned indoor and outdoor debris remove...