York MagnaDRY DK-07 Series Installation Manual Download Page 2 | Manualshive

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335224-BIM-B-1208

2

Johnson Controls Unitary Products

TABLE OF CONTENTS

GENERAL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS  . . . . . . . . . . . . . . . . . . . . . . . 4
INSPECTION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
REFERENCE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RENEWAL PARTS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

INSTALLATION SAFETY INFORMATION  . . . . . . . . . . . . . . 7
PRECEDING INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . 7
LIMITATIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
LOCATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . . . 11
CLEARANCES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
DUCT COVERS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
COMPRESSORS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
THERMOSTAT WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . . . 19
POWER WIRING DETAIL . . . . . . . . . . . . . . . . . . . . . . . . . . 19
OPTIONAL ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . 25
OPTIONAL GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
GAS CONNECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LP UNITS, TANKS AND PIPING . . . . . . . . . . . . . . . . . . . 27
VENT AND COMBUSTION AIR . . . . . . . . . . . . . . . . . . . . 28

OPTIONS/ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . 28

ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
MOTORIZED OUTDOOR DAMPER . . . . . . . . . . . . . . . . 28
ECONOMIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
POWER EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
RAIN HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

ECONOMIZER AND POWER EXHAUST SET POINT

ADJUSTMENTS AND INFORMATION . . . . . . . . . . . . . . . 29

MINIMUM POSITION ADJUSTMENT . . . . . . . . . . . . . . . 29
ENTHALPY SET POINT ADJUSTMENT . . . . . . . . . . . . . 29
POWER EXHAUST DAMPER SET POINT (WITH OR

WITHOUT POWER EXHAUST) . . . . . . . . . . . . . . . . . . . 29

INDOOR AIR QUALITY AQ . . . . . . . . . . . . . . . . . . . . . . . 29

PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
BLOWER ROTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
BELT TENSION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

AIR BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

CHECKING AIR QUANTITY . . . . . . . . . . . . . . . . . . . . . . . . 45

METHOD ONE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
METHOD TWO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

SUPPLY AIR DRIVE ADJUSTMENT . . . . . . . . . . . . . . . . . 47

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

SEQUENCE OF OPERATIONS OVERVIEW . . . . . . . . . . . 48
COOLING SEQUENCE OF OPERATION. . . . . . . . . . . . . . 49

CONTINUOUS BLOWER. . . . . . . . . . . . . . . . . . . . . . . . . 49
INTERMITTENT BLOWER. . . . . . . . . . . . . . . . . . . . . . . . 49
NO OUTDOOR AIR OPTIONS. . . . . . . . . . . . . . . . . . . . . 49
ECONOMIZER WITH SINGLE ENTHALPY SENSOR -  . 49
ECONOMIZER WITH DUAL ENTHALPY SENSORS - . . 49
ECONOMIZER WITH POWER EXHAUST -  . . . . . . . . . . 49
MOTORIZED OUTDOOR AIR DAMPERS -. . . . . . . . . . . 49
COOLING OPERATION ERRORS  . . . . . . . . . . . . . . . . . 50

HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . .  50
LOW-PRESSURE LIMIT SWITCH. . . . . . . . . . . . . . . . . .  50
FREEZESTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
LOW AMBIENT COOLING  . . . . . . . . . . . . . . . . . . . . . . .  50

SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
COMPRESSOR PROTECTION . . . . . . . . . . . . . . . . . . . . . 51

FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

REHEAT MODE SEQUENCE OF OPERATION . . . . . . . . 51

“NORMAL” MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
"ALTERNATE” MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

ELECTRIC HEATING SEQUENCE OF OPERATIONS . . . 55
ELECTRIC HEAT OPERATION ERRORS . . . . . . . . . . . . . 55

TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . .  55
SAFETY CONTROLS  . . . . . . . . . . . . . . . . . . . . . . . . . . .  55
LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55

ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . . . . . .  55
GAS HEATING SEQUENCE OF OPERATIONS . . . . . . . .  56
IGNITION CONTROL BOARD . . . . . . . . . . . . . . . . . . . . . .  56

FIRST STAGE OF HEATING. . . . . . . . . . . . . . . . . . . . . .  56
SECOND STAGE OF HEATING . . . . . . . . . . . . . . . . . . .  56
RETRY OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
RECYCLE OPERATION  . . . . . . . . . . . . . . . . . . . . . . . . .  56

GAS HEATING OPERATION ERRORS . . . . . . . . . . . . . . . 56

LOCK-OUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . .  56
FLAME SENSE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57

SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
AUXILIARY LIMIT SWITCH (ALS). . . . . . . . . . . . . . . . . .  57
PRESSURE SWITCH (PS)  . . . . . . . . . . . . . . . . . . . . . . .  57
ROLLOUT SWITCH (ROS) . . . . . . . . . . . . . . . . . . . . . . .  57
INTERNAL MICROPROCESSOR FAILURE . . . . . . . . . .  57
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
RESETS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57

GAS HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . . . 57

START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

PRESTART CHECK LIST. . . . . . . . . . . . . . . . . . . . . . . . . .  58
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . .  58
POST START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . .  58

START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . . . 58

PRE-START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . . 58
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . 58

LIGHTING THE MAIN BURNERS . . . . . . . . . . . . . . . . . . 58

POST START CHECKLIST  . . . . . . . . . . . . . . . . . . . . . . . .  58
SHUT DOWN  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
MANIFOLD GAS PRESSURE ADJUSTMENT . . . . . . . . . .  59
CHECKING GAS INPUT. . . . . . . . . . . . . . . . . . . . . . . . . . .  59

NATURAL GAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . . . 61
BURNERS/ORIFICES INSPECTION/SERVICING . . . . . . . 61

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

UNIT CONTROL BOARD OPTION SETUP . . . . . . . . . . . 65

OPTION BYTE SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . .  65
HEAT DELAY SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  65
COOLING TROUBLESHOOTING GUIDE  . . . . . . . . . . . . .  69
GAS HEAT TROUBLESHOOTING GUIDE  . . . . . . . . . . . .  72

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Summary of Contents for MagnaDRY DK-07 Series

Page 1: ...LATURE 6 INSTALLATION 7 OPERATION 48 START UP COOLING 58 START UP GAS HEAT 58 TROUBLESHOOTING 63 See following pages for a complete Table of Contents NOTES CAUTIONS AND WARNINGS The installer should p...

Page 2: ...POWER EXHAUST 49 MOTORIZED OUTDOOR AIR DAMPERS 49 COOLING OPERATION ERRORS 50 HIGH PRESSURE LIMIT SWITCH 50 LOW PRESSURE LIMIT SWITCH 50 FREEZESTAT 50 LOW AMBIENT COOLING 50 SAFETY CONTROLS 50 COMPRES...

Page 3: ...TAGE LIMITATIONS 11 2 UNIT TEMPERATURE LIMITATIONS 11 3 UNIT WEIGHTS 12 4 4 POINT LOAD WEIGHT 12 5 6 POINT LOAD WEIGHT 12 6 UNIT CLEARANCES 15 7 CONTROL WIRE SIZES 19 8 ELECTRICAL DATA DK 07 WITHOUT P...

Page 4: ...nsit If damage is evident the extent of the damage should be noted on the carrier s freight bill A separate request for inspection by the carrier s agent should be made in writing Should overheating o...

Page 5: ...l electric heat or a forced air furnace 2 For outdoor installation only 3 For installation on combustible material and may be installed directly on combustible flooring or in the U S on wood flooring...

Page 6: ...Style B A No Options Installed Installation Options B Option 1 C Option 2 D Options 1 2 E Option 3 F Option 4 G Options 1 3 H Options 1 4 J Options 1 2 3 K Options 1 2 4 L Options 1 3 4 M Options 1 2...

Page 7: ...e rating plate specified on Page 61 of these instructions 5 This equipment is not to be used for temporary heating of buildings or structures under construction PRECEDING INSTALLATION 1 Remove the two...

Page 8: ...be installed in strict compliance with the enclosed installation instructions and any applicable local state and national codes including but not limited to building electrical and mechani cal codes T...

Page 9: ...d Core Condenser Section Two stage gas heat ing to maintain warm comfortable temperature Intelligent control board for safe and efficient operation Side entry power and control wiring knockouts Tool l...

Page 10: ...Two stage gas heating to maintain warm comfortable temperature Intelligent control board for safe and efficient operation Slide out drain pan with brass NPT female connection Compressor 1 access high...

Page 11: ...ded for this purpose LENGTH OF FORKS MUST BE A MINIMUM OF 60 INCHES TABLE 1 UNIT VOLTAGE LIMITATIONS Power Rating Utilization range A in accordance with ARI Standard 110 Minimum Maximum 208 230 3 60 1...

Page 12: ...5 84 w PE 150 148 w Elec Heat 49 49 w Gas Heat 8 Tube Heat Exchanger 110 110 TABLE 4 4 POINT LOAD WEIGHT Model Location lbs Weights include largest gas heat option A B C D DK 07 250 215 309 374 DK 10...

Page 13: ...Excessive exposure to contaminated combustion air will result in safety and performance related prob lems To maintain combustion air quality the recom mended source of combustion air is the outdoor a...

Page 14: ...Power Entry 2 1 2 30 11 32 Control Entry 7 8 Power Entry 2 1 2 LEFT FRONT For Drain Dimensions See Detail C 11 1 2 FIGURE 13 DK 12 UNIT DIMENSIONS 11 1 2 89 27 59 50 3 4 30 11 32 4 1 4 6 3 16 17 3 16...

Page 15: ...is charge outlet 72 Right 12 Front The products of combustion must not be allowed to accumulate within a confined space and re circulate 36 Left 36 Rear To remove the slide out drain pan a rear cleara...

Page 16: ...ucts FIGURE 15 DK 07 10 REAR DUCT DIMENSIONS Dot Plugs 18 1 4 5 5 32 31 11 16 2 31 32 18 1 4 Return Air Supply Air A B C FIGURE 16 DK 12 REAR DUCT DIMENSIONS Return Air Supply Air 18 1 4 18 1 4 28 1 4...

Page 17: ...no duct cover changes are necessary For side duct application remove the side duct covers and install over the bottom duct openings The panels removed from the side duct connections are designed to b...

Page 18: ...inch filters are supplied with each unit One inch filters may be used with no modification to the filter racks Filters must always be installed ahead of evaporator coil and must be kept clean or repl...

Page 19: ...nnects are available If installing a disconnect field supplied or UP supplied accessory refer to Figures 4 and 5 for the recommended mounting location NOTE Since not all local codes allow the mounting...

Page 20: ...close the outdoor economizer dampers when the thermostat switches to the set back position 3 TO REMOTE SENSOR 2ET04701324 IF USED DEHUMIDISTAT Dehumidistat closes on rise in humidity RC RH Y1 Y2 G W1...

Page 21: ...ING UNIT WITH WITHOUT ELECTRIC HEAT FIGURE 25 FIELD WIRING DISCONNECT COOLING UNIT WITH GAS HEAT TERMINAL BLOCK TB1 FACTORY OR FIELD SUPPLIED DISCONNECT GROUND LUG THREE PHASE POWER SUPPLY L1 T1 L2 T2...

Page 22: ...110 0 1 5 6 2 8 2 5 5 0 0 230 13 1 110 0 1 5 6 2 8 2 5 5 0 0 460 6 7 54 0 0 8 3 1 4 1 2 2 0 0 575 5 1 44 0 0 6 2 4 3 6 1 8 0 0 Maximum HACR breaker of the same AMP size is applicable RLA LRA FLA 1 5...

Page 23: ...0 3 5 8 2 10 9 5 5 0 0 230 16 0 137 0 3 5 8 2 10 9 5 5 0 0 460 8 3 69 0 1 6 4 1 5 3 2 2 0 0 575 6 4 58 0 1 3 3 6 4 1 1 8 0 0 Maximum HACR breaker of the same AMP size is applicable RLA LRA FLA 2 3 2 3...

Page 24: ...5 10 9 16 1 5 5 0 0 230 20 0 146 0 1 5 10 9 16 1 5 5 0 0 460 8 4 73 0 0 8 5 3 8 1 2 2 0 0 575 7 1 60 0 0 6 4 1 6 0 1 8 0 0 Maximum HACR breaker of the same AMP size is applicable RLA LRA FLA 3 5 3 5 3...

Page 25: ...15 Height in 32 40 40 Face Area ft 2 10 6 13 2 13 2 Reheat Coil Rows 2 2 2 Fins per Inch 13 13 13 Height in 28 36 36 Face Area ft 2 7 8 10 10 Condenser Fan Quantity 2 2 4 Propeller Dia in each 24 24 2...

Page 26: ...in cubic feet of gas per hour based upon a pressure drop of 0 3 inch W C and 0 6 specific gravity gas NOTE There may be a local gas utility requirement specify ing a minimum diameter for gas piping Al...

Page 27: ...d from the factory equipped for natural gas use only The unit may be converted in the field for use with LP gas with accessory kit model number 1NP0441 All LP gas equipment must conform to the safety...

Page 28: ...unt in the heat compartment with the heating elements extending into the supply air cham ber All electric heaters are fused and intended for use with single point power supply MOTORIZED OUTDOOR DAMPER...

Page 29: ...t point adjusting screw fully clockwise past the D setting POWER EXHAUST DAMPER SET POINT WITH OR WITH OUT POWER EXHAUST With no power exhaust option adjust the Exhaust Air Adjustment Screw fully cloc...

Page 30: ...D D C C B B A A CONTROL CURVE CONTROL POINT APPROX 0 F 0 C AT 50 RH A D C B 63 17 73 23 70 21 67 19 FIGURE 29 HONEYWELL ECONOMIZER CONTROL W7212 N1 N P1 P EXH Set EXH Min Pos IAQ Max IAQ IAQ Min Free...

Page 31: ...30 Scroll compressors require proper rotation to oper ate correctly Units are properly phased at the fac tory Do not change the internal wiring to make the blower condenser fans or compressor rotate...

Page 32: ...3618 827 1440 1 54 0 6 4149 910 1905 2 04 3786 871 1613 1 73 3411 829 1353 1 45 0 7 4286 951 2134 2 29 3945 913 1812 1 94 3582 873 1520 1 63 3207 831 1260 1 35 0 8 4123 954 2036 2 18 3740 915 1713 1 8...

Page 33: ...641 0 69 0 7 3088 851 1329 1 43 2857 812 1149 1 23 2590 779 983 1 05 2237 752 831 0 89 1964 731 693 0 74 0 8 2853 853 1250 1 34 2622 814 1070 1 15 2354 781 904 0 97 1940 754 752 0 81 0 9 2605 855 1164...

Page 34: ...1505 1 6 3256 833 1337 1 4 0 6 4086 978 2062 2 21 3803 938 1801 1 93 3532 901 1592 1 71 3283 866 1416 1 5 3035 834 1249 1 3 0 7 3885 979 1973 2 12 3602 940 1712 1 84 3326 903 1502 1 61 3078 868 1326 1...

Page 35: ...759 938 1782 1 91 3495 901 1577 1 69 3227 867 1392 1 49 2934 835 1205 1 29 0 7 3823 980 1946 2 09 3574 940 1700 1 82 3306 903 1493 1 60 3040 868 1309 1 40 2750 837 1122 1 20 0 8 3872 1025 2139 2 30 36...

Page 36: ...08 1976 2 12 3630 860 1631 1 75 0 8 5005 1042 3090 3 31 4658 1000 2648 2 84 4307 956 2239 2 40 3859 910 1862 2 00 3416 862 1517 1 63 0 9 4840 1044 2969 3 18 4493 1002 2527 2 71 4100 958 2118 2 27 3652...

Page 37: ...572 1044 2840 3 05 4242 1002 2419 2 59 3930 957 2062 2 21 3598 911 1754 1 88 3234 863 1423 1 53 0 9 4741 1088 3126 3 35 4437 1046 2748 2 95 4107 1004 2326 2 50 3770 959 1981 2 13 3439 913 1674 1 80 30...

Page 38: ...75 1 69 0 6 4773 1048 2865 3 07 4425 1004 2477 2 66 4078 959 2274 2 44 3732 911 2038 2 19 3388 862 1481 1 59 0 7 4919 1091 3182 3 41 4569 1049 2764 2 97 4221 1006 2376 2 55 3874 960 2180 2 34 3528 913...

Page 39: ...870 960 2178 2 34 3435 914 1901 2 0 6 4726 1092 3076 3 30 4431 1050 2689 2 88 4089 1007 2305 2 47 3702 962 2098 2 25 3270 915 1821 2 0 7 4567 1094 2981 3 20 4270 1052 2596 2 78 3929 1008 2211 2 37 354...

Page 40: ...4499 1067 2666 3 11 1 5865 1280 4944 5 77 5555 1240 4417 5 15 5244 1199 3880 4 53 4945 1157 3420 3 99 4646 1113 2981 3 48 4363 1068 2574 3 00 1 1 5753 1281 4848 5 66 5443 1241 4322 5 04 5131 1200 3784...

Page 41: ...91 5092 1199 3720 4 34 4842 1157 3274 3 82 4549 1113 2873 3 35 4266 1068 2517 2 94 0 9 5666 1281 4664 5 44 5335 1241 4128 4 82 5015 1200 3637 4 24 4722 1158 3191 3 72 4428 1114 2790 3 26 4146 1069 243...

Page 42: ...1288 4266 4 98 5063 1247 3841 4 48 4815 1205 3439 4 01 4562 1162 3059 3 57 4305 1117 2702 3 15 4044 1072 2368 2 76 0 9 5156 1288 4158 4 85 4912 1247 3733 4 36 4665 1205 3331 3 89 4412 1162 2952 3 44 4...

Page 43: ...4 28 4432 1251 3342 3 90 4283 1207 3021 3 52 4105 1164 2704 3 15 3901 1119 2390 2 79 1 4438 1295 3588 4 19 4326 1252 3260 3 80 4180 1208 2937 3 43 4004 1165 2619 3 06 3800 1120 2306 2 69 1 1 4327 129...

Page 44: ...OR ELECTRICAL FUSE SIZE CFM 0 1 ESP HP RPM QTY LRA FLA MCA 2PE0473125 208 230 1 0 75 1075 1 24 9 5 0 6 3 10 3 800 2PE0473146 460 1 N A 2 2 2 8 5 2PE0473158 575 1 1050 1 5 1 9 4 Motors are multi tapped...

Page 45: ...two 5 16 inch holes one in the return air duct as close to the inlet of the unit as possible and another in the supply air duct as close to the outlet of the unit as possible 2 Using the whole drilled...

Page 46: ...FIGURE 31 DRY COIL DELTA P Indoor Coil Pressure Drop vs Airflow 0 2 0 25 0 3 0 35 0 4 0 45 0 5 0 55 0 6 0 65 0 7 2200 3200 4200 5200 6200 Volumetric Flow Rate cfm Coil Pressure Drop iwg 100 Return Eco...

Page 47: ...d increase 3 Original BHP New BHP New motor Amps Speed increase 3 Amps at 3 800 CFM Speed increase 3 Original Amps New Amps Before making any blower speed changes review the installation for any insta...

Page 48: ...y TABLE 33 ADDITIONAL STATIC RESISTANCE CFM Gas Heat Electric Heat KW 9 18 24 36 54 2300 0 08 0 07 0 08 0 09 0 10 0 13 2500 0 09 0 08 0 09 0 10 0 11 0 14 2700 0 11 0 09 0 10 0 12 0 13 0 16 2900 0 12 0...

Page 49: ...st stage cooling the low voltage control circuit from R to G and Y1 is com pleted The UCB energizes the blower motor if the fan switch on the room thermostat is set in the AUTO position and drives the...

Page 50: ...her compressor is idle stop the condenser fans If the call for cooling is still present at the conclusion of the ASCD the UCB will re energize the halted compressor Should a freezestat open three time...

Page 51: ...izes SOL 3 and SOL 2 and energizes SOL 1 engaging circuit 1 resulting in circuit 1 cooling mode operation When the room thermostat calls for second stage cooling the RCB senses a signal through Y1 Y2...

Page 52: ...35224 BIM B 1208 52 Johnson Controls Unitary Products FIGURE 32 REHEAT CONTROL BOARD R Y1 Y2 G W1 OCC C W2 P4 P5 P6 P3 COM HGRR HGR HUM K1 K2 K4 K3 MODE SELECTION JUMPER DEHUMIDISTAT HARNESS CONNECTIO...

Page 53: ...335224 BIM B 1208 Johnson Controls Unitary Products 53 FIGURE 33 DK 07 AND DK 10 REHEAT CONTROLS...

Page 54: ...335224 BIM B 1208 54 Johnson Controls Unitary Products FIGURE 34 DK 12 REHEAT CONTROLS...

Page 55: ...ng safety controls LIMIT SWITCH LS This control is located inside the heater compartment and is set to open at the temperature indicated in the Electric Heat Limit Setting Table 35 It resets automatic...

Page 56: ...lame is lost or is not detected during an attempt to achieve ignition a retry operation occurs A 30 second purge is performed between ignition attempts If the unit fails after three ignition attempts...

Page 57: ...is wired in series with the limit switch As such the UCB cannot distinguish the auxiliary limit and the gas heat limit switch operation except the auxiliary is manual reset Consequently the control w...

Page 58: ...ssures for both circuits 2 Measure the temperature drop across the evaporator coil START UP GAS HEAT PRE START CHECK LIST Complete the following checks before starting the unit 1 Check the type of gas...

Page 59: ...rease manifold pressure Be sure not to over fire the unit on second stage 7 After the high manifold pressure has been checked adjust the thermostat to call for first stage heat 8 If necessary using a...

Page 60: ...xample 6 If necessary adjust the low pressure regulator as dis cussed in the section Manifold Gas Pressure Adjust ment Be sure not to under fire the furnace on first stage If in doubt it is better to...

Page 61: ...S ORIFICES INSPECTION SERVICING Before checking or changing burners pilot or orifices CLOSE MAIN MANUAL SHUT OFF VALVE AND SHUT OFF ALL POWER TO THE UNIT 1 Open the union fitting just upstream of the...

Page 62: ...0 65 70 75 80 85 90 95 100 105 Suction Pressure psig Discharge Pressure psig 115 F Outdoor 105 F Outdoor 95 F Outdoor 85 F Outdoor 75 F Outdoor 65 F Outdoor 150 170 190 210 230 250 270 290 310 330 350...

Page 63: ...mproper and dan gerous operation which could cause injury to person and or damage unit components Verify proper oper ation after servicing Troubleshooting of components may require open ing the electr...

Page 64: ...s it may be necessary to zero the ASCD for the compressors in order to perform troubleshooting To reset all ASCDs for one cycle press and release the UCB TEST RESET button once Flash codes that do and...

Page 65: ...eters for the currently displayed mode Option Byte or Heat Delay HEAT DELAY SETUP Enter the Option Setup mode by pushing the OPTION SETUP STORE button and holding it for at least 2 sec onds The green...

Page 66: ...RTBEAT Normal Operation 1 Not Applicable 2 Pressure Switch Stuck Closed Pressure Switch 3 Pressure Switch Failed To Close Venter Pressure Switch Vent Blocked 4 Limit Switch Open Main Limit AUX Limit 5...

Page 67: ...Cooling Yes Yes Loss of Call for Heating Loss of Call for Cooling Heat Off Cool Off Yes Yes No Call for ID Blower Fan off 10 secs Energize ID Blower Motor Yes Yes No Programming Program Unit Control B...

Page 68: ...s f l a g a l a r m C a l l f o r H e a t w o u t G V v o l t a g e N o v o l t a g e 5 m i n F l a g A l a r m F O S i n p u t r e g a i n e d I n c r e a s e i n c i d e n t v a l u e b y 1 N o F O...

Page 69: ...10 If the thermostat and UCB are properly wired replace the UCB On calls for cooling the supply air blower motor is operating but compressor 1 is not the room thermostat fan switch is in the AUTO posi...

Page 70: ...distributors can test the UCB for this programming For units with factory installed economizers the UCB is programmed to lock out compressor operation when the LAS set point is reached For units witho...

Page 71: ...cooling calls Check the UCB for alarms indicating that compressor 1 is locked out Press and release the ALARMS button if the LED is not flashing an alarm 2 Check for line voltage at the compressor con...

Page 72: ...rect the error replace the UCB GAS HEAT TROUBLESHOOTING GUIDE On calls for heating the draft motor operates and the furnace lights but the supply air blower motor does not energize after a short delay...

Page 73: ...nning check for 24 volts at the pressure switch terminal on the ICB If not present check for 24 volts on the terminal from the pressure switch If present go to step 4 If 24 volts is not present the ei...

Page 74: ...335224 BIM B 1208 74 Johnson Controls Unitary Products...

Page 75: ...335224 BIM B 1208 Johnson Controls Unitary Products 75...

Page 76: ...change without notice Printed in U S A 335224 BIM B 1208 Copyright 2009 by Johnson Controls Inc All rights reserved Supersedes 335224 BIM A 0807 Johnson Controls Unitary Products 5005 York Drive Norma...

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