3 or 4 Flavor Operating Pressures

Viper 3 / 4 Barrel 60 Hz 404a
With Copeland ZB-19 compressor
Charge :
3brl:96oz 4brl: 108oz

Refrigeration High Side

70F = 225 +/- 10 psi

80F = 260 +/- 10 psi

90F = 300 +/- 10 psi

100F = 340 +/- 10 psi

Low Side

1 brl 39+/- 2 psi

2 brl 45 +/- 2 psi

3 brl 47 +/- 2 psi

Hot Gas Defrost High Side

70F = 150 +/- 10 psi

80F = 180 +/- 10 psi

90F = 210 +/- 10 psi

100F = 240 +/- 10 psi

Low side

70F = 30 +/- 5 psi

80F = 41 +/- 5 psi

90F = 51 +/- 5 psi

100F = 60 +/- 5 psi

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

Viper 3 and 4 Barrel 60 Hz 404a
With Copeland ZS-19 compressor
Charge :
3brl: 74.1oz 4brl: 81.1oz

Refrigeration High Side

75F = 275 +/- 20 psi

90F = 330 +/- 20 psi

104F = 380 +/- 20 psi

Low Side

1 brl = 38 +/- 2 psi

2 brl = 42 +/- 2 psi

3& 4 brl = 47 +/- 2 psi

Hot Gas Defrost High Side

75F = 175 +/- 20 psi

90F = 230 +/- 20 psi

104F = 280 +/- 20 psi

Low side

75F = 30 +/- 5 psi

90F = 41 +/- 5 psi

104F = 51+/- 5 psi

Viper 3 & 4 Barrel 60 Hz 448a
With Copeland ZS-19 compressor
Charge :
3brl: 49.4oz 4brl: 63.5oz

Refrigeration High Side

75F = 265 +/- 20 psi

90F = 330 +/- 20 psi

104F = 370 +/- 20 psi

Low Side

1 brl = 37 +/- 2 psi

2 brl = 42 +/- 2 psi

3& 4 brl = 47 +/- 2 psi

Hot Gas Defrost High Side

75F = 165 +/- 20 psi

90F = 230 +/- 20 psi

104F = 270 +/- 20 psi

Low side

75F = 30 +/- 5 psi

90F = 41 +/- 5 psi

104F = 51 +/- 5 psi

NOTE: Starting with 62E2022VP001 production of 60Hz 3 Barrel Vipers changed from Copeland ZB to Copeland ZS model compressors.

Note: ZB model compressors are rated for units manufactured with 404a refrigerant. ZS model compressors are rated for units manufactured with either 404a or 448a refrigerant.

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