LZR, ZB, ZF & ZP (R410a) Series Available in R22 / R407C/ R134A / R404A / R410A in the range of (+)20 to (-)40 deg C Evaporation. Ultra high Efficiency, low sound levels, available in Eco- Friendly refrigerants. - The unique design patented by Copeland, with Advanced Scroll Temperature Protection Available in All Voltage & dual frequency. Tandem ready option available. Oil sight glass, Rotalock & Schrader Valve features.