Installation manual

Introduction
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1.0 INTRODUCTION
1.1 System Descriptions
Deluxe System/3 environmental control systems are available in several configurations. Each configu-
ration can operate with either Advanced Microprocessor Controls (AM), or Advanced Microprocessor
Controls with Graphics (AG). A brief description of each, including operational differences, can be
found below. Check model numbers to see what is supplied with your unit.
1.1.1 Compressorized Two-Step Systems
These systems may be air, water, or glycol cooled, depending on the heat rejection method selected.
Cooling
Two stages of mechanical refrigeration are available.
Heating
Three stages of electric reheat are standard; steam/hot water, hot gas (on water and glycol cooled sys-
tems) are optional.
Humidification
Infrared is standard. Steam grid and steam generating humidification are optional.
Dehumidification
These systems utilize the lag compressor.
1.1.2 Compressorized Four-Step Systems
The four-stage systems have all the features of a compressorized, two-stage system plus cylinder
unloaders on one head of each compressor. This permits the compressors to operate at a reduced level
and increases energy efficiency during low-load conditions. The system responds to an increasing
room load with either a two-step or a four-step process of increasing the unit's cooling.
Cooling
These systems have four stages of mechanical refrigeration:
a. Lead compressor at reduced capacity
b. Lead and lag compressors at reduced capacity
c. Lead compressor at full capacity; lag compressor at reduced capacity
d. Lead and lag compressors at full capacity
Heating
Three stages of electric reheat are standard; hot water/steam are optional.
Humidification
Infrared is standard; steam grid and steam generating humidification are optional.
Dehumidification.
These systems utilize the lag compressor.
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