OO-A-373D
of the individual motors. The locked-rotor current shall be not greater than the name plate locked-rotor current as determined in UL 1995.
3.11.6 Maximum operating conditions. The unit shall operate continuously without damage to the motors, other electrical parts or wiring because of overheating, and without damage to any other component from any operational cause under the maximum operating conditions specified in ARI 210/240 or ARI 360, as applicable and without interruption cause by tripping of the motor overload protective devices. During the first five minutes after an overload shutdown period, the interruption of the operation of any motor caused by tripping of its motor overload protective device, will be permitted. Type SP-W units shall be capable of operation under these maximum conditions at a water pressure drop not greater than 15 psi (3.7 kPa), measured across the unit.
3.11.7 Low temperature conditions. The unit shall operate without damage to the equipment. Frost or ice shall not form on the cooling coil to the extent specified in ARI 210/240 or ARI 360 as applicable. During low temperature operation and during the defrosting period after completion of the low temperature operation, all ice or meltage must be caught by the condensate collection pan, and either dissipated into the condenser air stream or disposed by the drain.
3.11.8 Condensate disposal. For type SP-A and SPY-A units less than 135,000 Btu/hr
(39 565 W) which reject condenser air, there shall be no dripping, running-off, or blowing-off of moisture from the unit when controls and dampers are set to produce condensate at the maximum rate.
3.11.9 Insulation efficiency. For units less than 135,000 Btu/hr (39 565 W) condensate water shall not drip, run, or blow-off the outer surfaces of the unit when controls, fans, dampers, and grilles are set to produce the maximum tendency to sweat to the extent specified in ARI 210/240.
3.11.10 External resistance for style B units. Unless otherwise specified (see 6.2), when delivering the rated capacity and air quantity specified herein, the unit shall be designed to work against the minimum external resistance as noted in ARI 210/240 and ARI 360, as applicable.
The external resistance for style B units so noted shall be available for the duct system with all the specified equipment for the unit in place.
3.11.11 Heating capacity. The Btu/hr (W) heating capacity shall be not less than specified in
3.4.1.3 with applicable design temperatures, pressures, and voltage as specified in 3.8.6 (see 6.1.3).
3.11.12 Low voltage start. The compressor motors shall start at 10 percent low voltage as prescribed in ARI 210/240 and ARI 360 as applicable.
3.12 Corrosion protection. All materials in the units shall be so constructed that the units can meet the requirements of UL 1995 for corrosion protection. When finishes of 3.12.1 and 3.12.2 are required, acceptable evidence of meeting the requirements shall be a certificate of compliance by the manufacturer. The certificate of compliance shall indicate that all the finishes of the unit
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