axial flow design, with integrated slinger ring. The indoor fan shall be a dynamically balanced, poly- mer, reverse curve blower wheel, to assure uniform air distribution. The Fan Motor shall be of an enclosed design to reduce the effects of moisture and corrosion.
D.Compressor and Refrigerant:
The rotary-type Compressor shall be fully hermetic with internal and external vibration isolation. The refrigeration system will be sealed and contain a full refrigerant charge (R-22).
E.Coils:
Condenser and evaporator coils to be constructed of high-efficiency, 11 element lance sine wave
enhanced aluminum fins and 3/8-in. seamless axial grooved copper tubing, necessary to achieve EER and COP rating, as specified on the chassis nameplate.
F.Factory-Installed Electric Heater:
The factory-installed, open coil type, electric heater is standard in heat/cool and heat pump chassis. The electric heater shall contain both an automatic reset and a one-shot overtemperature protection device. The heating capacity of the electric heater shall be as identified on the Contract drawing schedule and in the specifications.
G.Controls:
All standard models shall be equipped with electro- mechanical controls to simplify the serviceability of the unit.
1.The chassis shall have standard controls, accessible and covered by a hinged door. The mode selection control shall consist of a mechanical rotary selector switch, which pro- vides OFF, FAN ONLY, HEAT or COOL oper- ations. The temperature selection control shall be an adjustable thermostat with upper and lower limits.
2.All standard models shall have a continuous/ fan cycle selector switch located behind the front panel. It shall allow the selection of con- tinuous fan operation for maximum comfort or cycle operation (fan only runs with cooling or heating operation) for maximum energy savings.
3.All standard models shall have a Temperature Limiter control located behind the front panel. The temperature limiter allows a room temper- ature range to be set, to avoid extreme temper- ature settings, to maximize energy savings.
4.Emergency Heat Switch (Heat Pump Models Only) shall disable the compressor in heating mode and only allow the use of electric heat during heating cycles. The Emergency Heat switch is active at all outdoor ambient temperatures.
5.Wall thermostat chassis (RC and RP models) shall come from the factory ready for wall thermostat installation, including a blank out plate in place of the control knobs. No field- installed kits or wire harnesses shall be required.
6.Wall thermostat chassis (RC and RP models) shall have a user selectable fan speed control
switch, on the control panel, to optimize fan speed for maximum comfort.
H.Safeties:
Compressor shall have automatic reset, overtem- perature and overcurrent protection. The fan motor shall have an inherent, automatic reset overtemper- ature protection. The electric heater shall have two overtemperature protectors.
I.Front Panel (supplied with chassis):
Front panel shall be constructed of a polymer mate- rial to resist breakage and corrosion. It shall have a front louvered surface with integrated control door and air filters. The air filters shall be easily accessible without removing the front panel from the chassis.
J.Anti-Theft Control Knobs:
All chassis knobs shall resist breakage and corro- sion. They shall be mounted on to the control box section and captured behind the front panel, to pre- vent unauthorized removal.
K.Bi-Directional Discharge Grille:
Bi-directional polymer discharge grille shall resist corrosion and breakage. It shall be easily set to direct air at 40 degrees from horizontal or 80 degrees from horizontal. This non-metallic dis- charge grille shall be cool to the touch during the heating cycle.
L.Ventilation:
The chassis shall have a manual adjustable fresh air vent with a concealed manual control. The vent control shall allow a maximum of 50 cfm of fresh air to be drawn into the room when the indoor fan is operating and the door is open. The ventilation air can be increased to approximately 95 cfm by add- ing the Booster Ventilation accessory kit (see section Q.13)
M.High-Efficiency Condensate Removal System:
The chassis shall have a condensate removal sys- tem consisting of a condensate suction port, to draw and atomize condensate, and a slinger ring inte- grated in the outdoor fan, to disperse condensate onto the condenser coil to be evaporated.
N.Snow Baffle:
The chassis shall contain a snow baffle to prevent melting snow from freezing and potentially damag- ing the outdoor fan.
O.Corrosion Protection (CP and RP Models Only):
Chassis with Corrosion Protection (CP,RP) shall be used for coastal or corrosive environments, to pro- long the life of the product. Minimum requirements are:
1.All outdoor-exposed sheet metal parts shall be coated with a polyester powder coat paint.
2.Compressor and outdoor-fan motor finish shall be capable of withstanding 500 hours of salt spray testing per ASTM B-117.
3.Compressor mounting screws shall be SermaGuard™ coated.
4.Outdoor coil fin stock shall be coated and able to withstand 1000 hours of salt spray testing per ASTM B-117.
5.Outdoor coil tube sheets shall be made of 316L stainless steel.
