Furnish and install a packaged, totally self contained explosion proof wall mount air conditioner UL listed for Class I, Divisions I & II, Groups C & D, hazardous locations. The units shall include a Class I, Division I, full hermetic compressor with patented gas tight pressure fitting over electrical connections. The evaporator and condenser fan motors shall be explosion proof. High voltage electrical controls shall be in one NEMA 7 explosion proof control box. Low voltage electrical controls shall be served by an intrinsically safe relay.

The entire unit shall be constructed of 16 gauge type 304 (type 316 optional) stainless steel for maximum protection from corrosive environments. The evaporator and condenser coils shall have copper tubes and aluminum fins with Heresite baked phenolic coating for maximum corrosion protection. The evaporator section shall be insulated with 1" thick 1 1/2# density acoustic insulation. The compressor shall be mounted on internal and external vibration isolators for quite operation. The compressor shall be high efficiency full hermetic type with internal pressure relief valves.

The unit controls shall include a thermostatically controlled expansion valve, high and low refrigerant pressure cut-out switches, solid state time delay relay to prevent short cycling and frost control to stop compressor in the event of coil icing due to dirty filter, etc. The unit shall be fully serviceable from side access doors and external grilles. Service doors shall be double wall, internally insulated. Provide service valves for pump-down capability. The unit shall be equipped with refrigerant sight glass with moisture indicator for aid in servicing system.

The system shall be a Model BWMX18C1 as manufactured by the Birdwell Company in Houston, Texas (no equal). Manufacturer reserves the right to change any product specifications without notice.