4
IM620-1
Introduction
This manual provides information about the MicroTech® MicroTech Absorption Gateway (MAG). It
describes the components, field wiring, and service procedures.
The MAG is an interface between the absorption chiller(s) and a MicroTech or Open Protocol™
building automation system (BAS). The MAG allows the BAS to read data from the absorption chiller,
but does not allow control of the chiller.
See Table 1 for the items that can be read from the absorption chiller through the MAG.
Table 1. Read-Only Data
Analog Data
Digital Output Data
Digital Input Data
Chilled water inlet/outlet
temperature
Absorbent solution pumps
Start/stop of pumps and blowers
Hot water inlet/outlet temperatures
Refrigerant pump
Combustion signal
Low/high temperature generator
temperature
Ignition signal
Remote Start/stop signals
Cooling water inlet/outlet
temperature
Heating, cooling, simultaneous and
abnormality indicators
Condensation temperature
SVRP and SVRU valves
Remote reset setting
Cooling main/heating main
Exhaust gas temperature/steam
condensate temperature
Alarms
Fuel control valves 1 and 2 position
Inverter Output Signal
Steam control valve output signal
!
WARNING
Electric shock hazard. Can cause personal injury or equipment damage.
This equipment must be properly grounded. Connections and service to the MicroTech
control panel must be performed only by personnel that are knowledgeable in the operation
of the equipment being controlled.
!
CAUTION
Static sensitive components. A static discharge while handling electronic circuit boards
can cause damage to the components.
Discharge any static electrical charge by touching the bare metal inside the control panel
before performing any service work. Never unplug any cables, circuit board terminal blocks,
or power plugs while power is applied to the panel.
