GP Series Portable Chillers Chapter 7: Appendix 61 of 73
chiller • Back draft damper to outside must be closed at all times when fan/blower is not operating •
Chillers with dual fans/blower must have a back draft damper on the cycling fan/blower to prevent
recirculation of hot discharge air • Chillers are designed to operate at a condensing entering air
temperature of 60ºF (16ºC) minimum without optional Variable Frequency Drive • Maximum total static
pressure drop external to the chiller must not exceed 0.30” WG (75 Pa)