Controls, Start-Up, Operation, Service and ... - Climayoreo

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LIMIT SWITCH NO. 1 FLUE OUTLET SECTION 1 GAS VALVE LIMIT SWITCH NO. 2 Fig. 42 — Gas Section Detail, Sizes 055-100 — High Heat Fig. 43 — Burner Section Detail FLUE OUTLET SECTION 2 GAS VALVE FLUE OUTLET SECTION 3 GAS VALVE To inspect blower wheel, remove heat exchanger access panel. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove motor and wheel assembly by removing screws holding motor mounting plate to top of combustion fan housing (Fig. 45). The motor and wheel assembly will slide up and out of the fan housing. Remove the blower wheel from the motor shaft and clean with a detergent or solvent. Replace motor and wheel assembly. ECONOMIZER DAMPER MOTOR(S) — On units so equipped, the economizer motor(s) is located in the mixing box section. Access to it is through the door labeled FILTER SECTION. 140 CERAMIC BAFFLE CLIP HEAT EXCHANGER TUBES NOTE: One baffle and clip will be in each upper tube of the heat exchanger. Fig. 44 — Removing Heat Exchanger Ceramic Baffles and Clips Fig. 45 — Combustion Blower Removal CONDENSER FANS AND FAN MOTORS — Remove the wire fan guard on top of the unit to gain access to the condenser fans and motors. 25% OUTDOOR-AIR DAMPER — Access to adjust the damper is through the hoods. Remove filters to gain access into unit to adjust linkage arms. MODULATING POWER EXHAUST DAMPER MOTOR — The modulating power exhaust damper motor is located in the return-air end of the unit. IMPORTANT: When replacing panel, be sure to properly secure it in order to prevent water from being drawn into the unit. The motor is accessed through the small door below the side economizer hoods on the left side of the unit. See Fig. 39. RETURN-AIR FILTERS — Access to these filters is through the door marked FILTER SECTION. Filters in upper and lower bag filter tracks can only be removed from the right side of the unit. Adjustments RETURN/EXHAUST FAN MOTOR PLATE Adjust using a 3 / 4-in. wrench on the adjusting bolts: 1. Loosen holddown bolts. (See Fig. 46). 2. Turn the adjusting bolts to move the motor mounting plate toward or away from the fan to loosen or tighten the belts. Make the same number of turns to each bolt. 3. Retighten holddown bolts.
SUPPLY FAN AND POWER EXHAUST MOTOR PLATE — Adjust using a 15 / 16-in. wrench on the adjusting bolts: 1. Loosen holddown bolts. (See Fig. 47.) 2. Turn the adjusting bolts to move the motor mounting plate toward or away from the fan to loosen or tighten the belts. Make the same number of turns to each bolt. 3. Retighten holddown bolts. BELT INSTALLATION AND TENSIONING IMPORTANT: When installing or replacing belts, always use a complete set of new, matched belts to prevent potential vibration problems. Mixing belts often results in premature breakage of the new belts. 1. Turn off unit power. 2. Adjust motor plate so belts can be installed without stretching over the grooves of the pulley. (Forcing the belts can result in uneven belt stretching and a mismatched set of belts.) 3. Before tensioning the belts, equalize belt slack so that it is on the same side of the belt for all belts. Failure to do so may result in uneven belt stretching. 4. Tighten belts using the motor plate adjusting bolts. HOLDDOWN BOLTS Fig. 46 — Return/Exhaust Fan Motor Plate Adjustment Fig. 47 — Motor Plate Adjustment HOLD- DOWN BOLTS 141 5. Adjust until proper belt tension ( 1 / 2-in. [13 mm] deflection with one finger centered between pulleys) is obtained. Be sure to adjust both adjusting bolts the same number of turns. NOTE: Check the tension at least twice during the first day of operation, as there is normally a rapid decrease in tension until the belts have run in. Check tension periodically thereafter and keep it at the recommended tension. With the correct belt tension, belts may slip and squeal momentarily on start-up. This slippage is normal and disappears after wheel reaches operating speed. Excessive belt tension shortens belt life and may cause bearing and shaft damage. PULLEY ALIGNMENT — For proper belt life, the motor and fan pulleys must be properly aligned. To check, first turn off unit power. Place a straightedge against the motor and fan pulleys. See Fig. 48. If the pulleys are properly aligned, the straightedge should be parallel to the belts. If they are not parallel, check that the motor shaft and fan shaft are parallel. If they are not, adjust the motor plate adjusting bolts until they are. After verifying that the shafts are parallel, loosen the setscrews on the motor pulley. Move pulley on the shaft until the pulleys are parallel. To move the sheave on the shaft, loosen the belts. If necessary, blower sheave can also be moved on the shaft. INSTALLING REPLACEMENT MOTOR PULLEY (Supply Fan Only) — To install a field-supplied replacement pulley: 1. Turn off unit power. 2. Loosen belts using motor adjusting bolts until belts can be removed without stretching them over the grooves of the pulley. 3. Remove belts. 4. Loosen setscrews on motor pulley. 5. Slide pulley off motor shaft. Make sure setscrews on new pulley are loose. 6. Slide new pulley onto fan shaft and align it with the fan pulley as described in Pulley Alignment section above. 7. Tighten setscrews. 8. Install belts and tension properly as described in Pulley Alignment section above. CONDENSER FAN ADJUSTMENT (All Units Except Size 035) 1. Turn off unit power. 2. Remove fan guard and loosen fan hub setscrew. 3. See Fig. 49 and adjust fan height using a straight edge laid across the fan deck. 4. Tighten setscrew to 12.5 to 13.75 ft-lb and replace rubber hubcap to prevent hub from rusting to the motor shaft. Fill hub recess with Permagum if hub has no rubber hubcap. 5. Replace fan guard. CONDENSER FAN ADJUSTMENT (Size 035) — Each fan is supported by a formed wire mount bolted to a fan deck and covered with a wire guard. The exposed end of the fan motor shaft is protected from weather by grease. If the fan motor must be removed for service or replacement, be sure to regrease fan shaft and reinstall fan cover, retaining clips, and fan guard. For proper performance, the fans should be positioned as shown in Fig. 50. Tighten setscrews to 14 1 ft-lb (18 1.3 N-m). Check for proper rotation of the fan(s) once reinstalled (counterclockwise viewed from above). If necessary to reverse, switch leads at contactor(s) in control box.
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Controls, Start-Up, Operation, Serv
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WARNING What to do if you smell gas
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and the ENTER keys until the desire
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START-UP IMPORTANT: Do not attempt
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Table 4 — Fan Performance — 48P
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AIRFLOW (cfm) Table 10 — Fan Perf
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AIRFLOW (Cfm) LEGEND Table 18 — F
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AIRFLOW (cfm) LEGEND Bhp — Brake
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HIGH-EFFICIENCY MOTORS Nominal Maxi
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2. Under the Setpoints menu, set th
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would use Period 2 and set days Sat
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there is a loss of communication be
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and when ON, the control sets a cap
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System Mode Test — When the syste
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Table 31 — Unit Configuration ITE
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SETTING UP THE SYSTEM Machine Contr
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High SST Alert Delay Time (H.SST)
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Table 36 — Cool/Heat Set Point Of
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Table 38 — Run Status Cool Displa
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To use Demand Limiting, select the
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Size 050, 055, 060 Contactor OFM(s)
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Whenever the outdoor ambient temper
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Demand Level Low Heat Off Offset (L
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Limit Switch Low Temp (SW.L.T) —
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STAGE Table 49 — IGC LED Indicato
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Table 50 — Static Pressure Contro
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Table 53 — Dirty Filter Switch Po
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NOTE: If the user wishes to disable
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the economizer modulates when attem
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P = K * BP.P * (error) I = K * BP.I
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its smoke. Closing the economizer (
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Table 57 — Indoor Air Quality Con
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Table 58 — Humidity Configuration
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The default sensor is the return ai
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TEMPERATURE COMPENSATED START LOGIC
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Sensor Trim Configuration — The T
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SUPPLY FAN VFD CONFIGURATION — Th
Page 89 and 90: REMOTE SWITCH LOGIC CONFIGURATION (
Page 91 and 92: Alarms and Alarm History for for an
Page 93 and 94: Transducer Troubleshooting — The
Page 95 and 96: Table 75 — 10K Thermistor vs Resi
Page 97 and 98: TEMP RESISTANCE (F) (Ohms) -25 98,0
Page 99 and 100: PRESSURE (PSIG) Table 80 — Suctio
Page 101 and 102: Table 81 — Discharge Pressure Tra
Page 103 and 104: Table 82 — Auto View of Run Statu
Page 105 and 106: Table 84 — Cooling Information Di
Page 107 and 108: equalize compressor oil levels. If
Page 109 and 110: Table 91 — Alert and Alarm Codes
Page 111 and 112: T072 (Evaporator Discharge Reset Se
Page 113 and 114: This alarm will disable mechanical
Page 115 and 116: This is the reverse of the Pressuri
Page 117 and 118: 117 a48-8408 Fig. 19 — Typical Po
Page 119 and 120: OD ENTHALPY SWITCH LOW REMOTE OCCUP
Page 121 and 122: Fig. 23 — Typical Electric Heat U
Page 123 and 124: 123 Fig. 25 — Typical Gas Heat Se
Page 125 and 126: 125 Fig. 27 — Component Arrangeme
Page 127 and 128: ACCSY — Accessory ACC’Y — Acc
Page 129 and 130: Table 93 — Rooftop Control Board
Page 131 and 132: Table 96 — Control Expansion Modu
Page 133 and 134: LEGEND IAQ — Indoor Air Quality V
Page 135 and 136: the motor position to be configured
Page 137 and 138: TIME EWT LWT SETP Run Status Servic
Page 139: Fig. 37 — Door Latch Fig. 38 —
Page 143 and 144: Routine cleaning of coil surfaces i
Page 145 and 146: Saturated Discharge Temperature (de
Page 163 and 164: Gas System Adjustment (48P Only) GA
Page 165 and 166: APPENDIX A — LOCAL DISPLAY TABLES
Page 177 and 178: APPENDIX B — CCN TABLES (cont) ST
Page 179 and 180: APPENDIX B — CCN TABLES (cont) ST
Page 181 and 182: APPENDIX B — CCN TABLES (cont) SE
Page 187 and 188: APPENDIX B — CCN TABLES (cont) MA
Page 189 and 190: APPENDIX B — CCN TABLES (cont) MA
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TESTACTC TESTCOOL TESTFANS TESTHEAT
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APPENDIX C — UNIT STAGING TABLES
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* 41 for Supply Fan Motor VFD, 42 f
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Fig. B — VFD Keypad START UP WITH
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Upload All Parameters — To upload
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To replace the main fan for frame s
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ALARM CODE ALARM NAME IN PANEL 2001
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APPENDIX E — MODE SELECTION PROCE
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CONTROLS SET POINT AND CONFIGURATIO
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Controls, Start-Up, Operation, Service and ... - Climayoreo

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