2 Flavor Operating Pressures

Viper 2 Barrel 60 Hz – 404a
With Copeland ZB-15 compressor
Charge : 96 oz.

Refrigeration High Side

70F = 240 +/- 10 psi

80F = 275 +/- 10 psi

90F = 315 +/- 10 psi

100F = 360 +/- 10 psi

Low Side

1 brl 41+/- 2psi or 2brl 47 +/- 2psi

Hot Gas Defrost High Side

70F = 150 +/- 10 psi

80F = 180 +/- 10 psi

90F = 210 +/- 10 psi

100F = 240 +/- 10 psi

Low side

70F = 37 +/- 5 psi

80F = 48 +/- 5 psi

90F = 58 +/- 5 psi

100F = 67 +/- 5 psi

Note: Only use factory replacement compressor unit was manufactured with.

Viper 2 Barrel - 448a
With Copeland ZS-15 compressor

60Hz Viper

50Hz Viper

Note: For 2 FL Vipers ZB model compressors are used for units manufactured with 404a refrigerant. ZS model compressors are used for units manufactured with 448a refrigerant.

Note: Only use factory replacement compressor unit was manufactured with.