York SUNLINE MagnaDRY DR180 Installation Manual

Also see for SUNLINE MagnaDRY DR 180: Submittal data sheet Installation manual

Contents

York SUNLINE MagnaDRY DR180 Installation Manual Manual pdf 63 page image

127915-YIM-A-0405Unitary Products Group 63FLASH CODESThe UCB will initiate a flash code associated witherrors within the system. Refer to UNIT CONTROLBOARD FLASH CODES Table 33.RESETSRemove the call for heating by lowering the thermostatsetting lower than the conditioned space temperature.This resets any flash codes.HEAT ANTICIPATOR SETPOINTSIt is important that the anticipator setpoint be correct.Too high of a setting will result in longer heat cyclesand a greater temperature swing in the conditionedspace. Reducing the value below the correct setpointwill give shorter "ON" cycles and may result in the low-ering of the temperature within the conditioned space.START-UP (COOLING)PRESTART CHECK LISTAfter installation has been completed:1. Check the electrical supply voltage being supplied.Be sure that it is the same as listed on the unitnameplate.2. Set the room thermostat to the off position.3. Turn unit electrical power on.4. Set the room thermostat fan switch to on.5. Check indoor blower rotation.• If blower rotation is in the wrong direction.Refer to Phasing Section in general informa-tion section.• Check blower drive belt tension.6. Check the unit supply air (CFM). See "CHECKINGSUPPLY AIR CFM" on page 52.7. Measure evaporator fan motor's amp draw.8. Set the room thermostat fan switch to off.9. Turn unit electrical power off.OPERATING INSTRUCTIONS1. Turn unit electrical power on.2. Set the room thermostat setting to lower than theroom temperature.3. First stage compressors will energize after thebuilt-in time delay (five minutes).4. The second stage of the thermostat will energizesecond stage compressor if needed.POST START CHECK LIST1. Verify proper system pressures for both circuits.2. Measure the temperature drop across the evapora-tor coil.3. Measure the system Amperage draw across alllegs of 3 phase power wires.4. Measure the condenser fan amp draw.TABLE 30: LIMIT CONTROL SETTINGUNITS(Tons)CAPACITY, MBH LIMIT CONTROLOPENS, ºFINPUT OUTPUT15, 20, 25 300 240 19515, 20, 25 400 320 195FIGURE 24 - GAS VALVE AND CONTROLSTABLE 31: GAS HEAT ANTICIPATOR SETPOINTSGAS VALVE ANTICIPATOR SETPOINT1st STAGE 2nd STAGEHoneywell VR8440 0.30 amp 0.11 ampWhite-Rodgers 36C68IGN.CONTROL#1IGN.CONTROL#2IGNITOR#1GV1GASVALVEGV2GASVALVEIGNITOR#2SENSOR#2SENSOR#1ROLLOUTSW.BURNERCOMPARTMENT