NOTICE
On 5 Ton unit the outdoor fan motor is a permanent magnet DC brushless type. The motor requires a separate Electronic Control to operate. Do not attempt to replace this motor with a typical PSC type. Damage to Electronic Control may result.
3.If the coil needs to be cleaned, use clean water to wash dust, dirt, and debris from outdoor condensing coil.
5.The indoor coil and drain pan should be inspected and cleaned reg- ularly to prevent odors and assure proper drainage.
Do not connect manifold gauges unless trouble is suspected. Approximately 3/4 ounce of refrigerant will be lost each time a stan- dard manifold gauge is connected.
NOTICE
DO NOT use coil cleaners to clean outdoor condensing coil. clean- ers containing
4.Refer to the furnace or air handler instructions for filter and blower motor maintenance.
TABLE 1:
IT IS UNLAWFUL TO KNOWINGLY VENT, RELEASE OR DIS- CHARGE REFRIGERANT INTO THE OPEN AIR DURING REPAIR, SERVICE, MAINTENANCE OR THE FINAL DISPOSAL OF THIS UNIT.
WHEN THE SYSTEM IS FUNCTIONING PROPERLY AND THE OWNER HAS BEEN FULLY INSTRUCTED, SECURE THE OWNER’S APPROVAL.
TEMP. °F | PRESSURE | TEMP. °F | PRESSURE | TEMP. °F | PRESSURE | TEMP. °F | PRESSURE | TEMP. °F | PRESSURE | |
PSIG | PSIG | PSIG | PSIG | PSIG | ||||||
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45 | 129.70 | 60 | 169.60 | 75 | 217.40 | 90 | 274.10 | 105 | 340.50 | |
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46 | 132.20 | 61 | 172.60 | 76 | 220.90 | 91 | 278.20 | 106 | 345.30 | |
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47 | 134.60 | 62 | 175.50 | 77 | 224.40 | 92 | 282.30 | 107 | 350.10 | |
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48 | 137.10 | 63 | 178.50 | 78 | 228.00 | 93 | 286.50 | 108 | 355.00 | |
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49 | 139.60 | 64 | 181.60 | 79 | 231.60 | 94 | 290.80 | 109 | 360.00 | |
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50 | 142.20 | 65 | 184.60 | 80 | 235.30 | 95 | 295.10 | 110 | 365.00 | |
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51 | 144.80 | 66 | 187.70 | 81 | 239.00 | 96 | 299.40 | 111 | 370.00 | |
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52 | 147.40 | 67 | 190.90 | 82 | 242.70 | 97 | 303.80 | 112 | 375.10 | |
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53 | 150.10 | 68 | 194.10 | 83 | 246.50 | 98 | 308.20 | 113 | 380.20 | |
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54 | 152.80 | 69 | 197.30 | 84 | 250.30 | 99 | 312.70 | 114 | 385.40 | |
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55 | 155.50 | 70 | 200.60 | 85 | 254.10 | 100 | 317.20 | 115 | 390.70 | |
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56 | 158.20 | 71 | 203.90 | 86 | 258.00 | 101 | 321.80 | 116 | 396.00 | |
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57 | 161.00 | 72 | 207.20 | 87 | 262.00 | 102 | 326.40 | 117 | 401.30 | |
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58 | 163.90 | 73 | 210.60 | 88 | 266.00 | 103 | 331.00 | 118 | 406.70 | |
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59 | 166.70 | 74 | 214.00 | 89 | 270.00 | 104 | 335.70 | 119 | 412.20 | |
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SECTION VIII: AC CONTROL BOARD FUNCTIONALITY
ANIT-SHORT CYCLE DELAY
The control includes a
The ASCD timer can be bypassed by connecting the TEST terminals for three seconds while the thermostat is calling for compressor opera- tion (Y1 input signal energized).
LOW VOLTAGE DETECTION
The control monitors the transformer secondary (24 VAC) voltage and provides low voltage protection for the AC unit and its components. In particular, the control prevents contactor chatter during low voltage con- ditions. If the voltage drops below approximately 19 VAC, the control will continue to energize any relays that are already energized but will not energize any additional relays until the voltage level increases. If the voltage drops below approximately 16 VAC, the control will immedi- ately
TEST INPUT
The control includes a TEST input connector that can be used for vari- ous testing functions during installation and service. Table 2 summa- rizes the behavior of the control when the two TEST pins are connected.
12 | Johnson Controls Unitary Products |