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Specification for WSHP SmartSource ALL PART 1: PRODUCTS 1.01 General: A. Electrical —All heat pump nameplate electrical utilization voltages shall be in conformance with ANSI Standard C84.1 as follows: B. All Water Source Heat Pump units shall be suitable for continuous operation with a supply voltage variation, measured at the factory power connection point, of ± 10% of the nameplate voltage. A control box shall be located within the unit and shall contain controls for compressor, reversing valve, and fan motor operation and shall have a 50VA 24V control circuit transformer and a terminal block for low voltage field wiring connections. Unit shall be nameplated to accept time delay fuses or HACR circuit breaker for branch overcurrent protection of the power source. All units shall have a Short -Circuit current rating of 5kA rms symmetrical, 600V maximum. C. Ceiling Mounted Units — Each heat pump shall incorporate four independent access panels to facilitate service to internal components from front or backside. Unit shall have an insulated divider panel between compressor compartment and fan blower section. Access panels shall be designed to cover an individual unit section, such as the fan blower, while servicing compressor compartment and related refrigerant components. D. Floor Mounted Units — Each heat pump shall incorporate four independent access panels to facilitate service to internal components from front or backside. Unit shall have an insulated divider panel between compressor compartment and fan blower section. Access panels shall be designed to cover an individual unit section, such as the fan blower, while servicing compressor compartment and related refrigerant components. E. Configuration — Units shall be provided configured as shown on the plans, in one of the following air -flow arrangements (Note: "Right" or "Left" side shall be determined when viewing the compressor compartment end panel): 1. Right Hand Return Air and Right Hand Piping Connections F. Fan and Motor Assembly — An ECM blower motor shall be provided on all units. Units shall have a direct drive centrifugal fan. Factory motor wiring shall be set for optimum fan performance. CFM settings shall be field adjustable by means of a fan speed selector switch located in the unit control box. The unit shall be shipped at one fixed setting. The ECM motor shall utilize a permanent magnet rotor, which is connected to the shaft through resilient rings to absorb high frequency torque ripple. The ECM motor shall deliver precise speed and economical performance regardless of system static pressure. Independent CFM adjustment for mode specific operation. G. Blower - The blower housing shall have a removable orifice ring to facilitate blower wheel and motor removal for ease of service and without the need to disconnect ductwork. Units without a removable orifice ring are not acceptable. H. Refrigerant Circuit — A sealed refrigerant circuit, consisting of a high efficiency scroll, rotary or reciprocating hermetic motor -compressor mounted on rubber vibration isolation grommets (spring isolators shall not be accepted), air-to-air refrigerant finned tube coil, refrigerant flow metering device, water -to -refrigerant coaxial tube type heat exchanger, high pressure safety cutout, and fusible pressure relief factory -installed on the refrigerant circuit. Heat pump conditioners shall additionally contain a pilot -operated refrigerant reversing valve. The reversing valve shall be energized for heating operation. High and low side refrigerant service valves shall be provided. The refrigerant flow -metering device shall be a thermostatic expansion valve. Refrigerant will be HFC R410A in all sizes. I. Safety Controls — High and low pressure switches and low temperature safety sensors shall be wired through a latching lockout circuit to disable the unit until it is reset electrically by interrupting the power supply to the unit. Automatic reset by wall sensor switching shall not be allowed. All safety switches shall be normally closed, opening upon fault detection. Control logic dependent upon the closing of a normally open switch shall not be allowed to preclude the possibility of simple, easily corrected faults being escalated into compressor or heat exchanger failure due to loss of integrity in control wiring. (heating or cooling methods that do not require the refrigeration circuit, including hydronic heat, waterside economizer, and electric heat, shall be allowed to operate during lockout. This includes fan and pump operation) Job Number: LL2OFE Page Prepared Date: 10/8/2020 Job Name: Brackets Point House 30 of 35 www.DaikinApplied.com