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• _ Job Name:Mararoperties Seaway • <br /> T �r°, Prepared For:Evergreen State Sheet Metal <br /> ar Unit Tag:Y4C-2 <br /> Quantity:1 <br /> Evaporator and Condenser Coils <br /> Internally finned, 5/16" copper tubes mechanically bonded to a configured aluminum plate fin shall be <br /> standard. Evaporator coils are standard for all 3 to 10 ton standard efficiency models. Microchannel <br /> condenser coils are standard for all 3 to 10 ton standard efficiency models and 4, 5, 6, 7.5, 8.5 ton high <br /> efficiency models. The microchannel type condenser coil is not offered on the 4 and 5 ton <br /> dehumidification model. Due to flat streamlined tubes with small ports, and metallurgical tube-to-fin <br /> bond, microchannel coil has better heat transfer performance. Microchannel condenser coil can <br /> reduce system refrigerant charge by up to 50% because of smaller internal volume, which leads to <br /> better compressor reliability. Compact all-aluminum microchannel coils also help to reduce the unit <br /> weight. These all aluminum coils are recyclable. Galvanic corrosion is also minimized due to all <br /> aluminum construction. Strong aluminum brazed structure provides better fin protection. In addition, <br /> flat streamlined tubes also make microchannel coils more dust resistant and easier to clean. Coils <br /> shall be leak tested at the factory to ensure the pressure integrity. The evaporator coil and condenser <br /> coil shall be leak tested to 600 psig. The assembled unit shall be leak tested to 465 psig. The <br /> condenser coil shall have a patent pending 1+1+1 hybrid coil designed with slight gaps for ease of <br /> cleaning. A plastic, dual-sloped, removable and reversible condensate drain pan with through-the-base <br /> condensate drain is standard. <br /> Controls <br /> Unit shall be completely factory-wired with necessary controls and contactor pressure lugs or terminal <br /> block for power wiring. Unit shall provide an external location for mounting a fused disconnect device. <br /> A choice of microprocessor or electromechanical controls shall be available. Microprocessor controls <br /> provide for all 24V control functions. The resident control algorithms shall make all heating, cooling, <br /> and/or ventilating decisions in response to electronic signals from sensors measuring indoor and <br /> outdoor temperatures. The control algorithm maintains accurate temperature control, minimizes drift <br /> from set point, and provides better building comfort. A centralized microprocessor shall provide anti- <br /> short cycle timing and time delay between compressors to provide a higher level of machine <br /> protection. 24-volt electromechanical control circuit shall include control transformer and contactor <br /> High Pressure Control <br /> All units include High Pressure Cutout as standard. <br /> Phase monitor <br /> Phase monitor shall provide 100% protection for motors and compressors against problems caused by <br /> phase loss, phase imbalance, and phase reversal. Phase monitor is equipped with an LED that <br /> provides an ON or FAULT indicator. There are no field adjustments. The module will automatically <br /> reset from a fault condition. <br /> Refrigerant Circuits <br /> Each refrigerant circuit offer thermal expansion valve as standard. Service pressure ports, and <br /> refrigerant line filter driers are factory-installed as standard. An area shall be provided for replacement <br /> suction line driers. <br /> Gas Heating Section <br /> The heating section shall have a progressive tubular heat exchanger design using stainless steel <br /> burners <br /> and corrosion resistant steel throughout. An induced draft combustion blower shall be used to pull the <br /> combustion products through the firing tubes. The heater shall use a direct spark ignition (DSO system. <br /> On initial call for heat, the combustion blower shall purge the heat exchanger for 20 seconds before <br /> ignition After three unsuccessful ignition attempts, the entire heating system shall be locked out until <br /> manually reset at the thermostat/zone sensor. Units shall be suitable for use with natural gas or <br /> propane (field-installed kit) and also comply with the California requirement for low NOx emissions <br /> (Gas/Electric Only). <br /> ***ATTENTION*** <br /> For installation in SCAQMD only: This furnace does not meet the SCAQMD Rule 1111 14 ng/J NOx <br /> emission limit, and thus is subject to a mitigation fee of up to $450. This furnace is not eligible for the <br /> Clean Air Furnace Rebate Program: www.CleanAirFurnaceRebate.com. <br /> Sequence of Operation (if applied in a SINGLE-ZONE CONSTANT-VOLUME SYSTEM or a <br /> CHANGEOVER BYPASS SYSTEM) <br /> B. SINGLE-ZONE CONSTANT-VOLUME SYSTEM <br /> 2022/04/29 20:43:06 Page 9 of 10 <br />