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Honeywell

THIS SOLID-STATE SYSTEM  IS A COMPONENT

FOR COMPONENT FIELD REPLACEMENT
FOR THE RANCO EA3 LODAPT SYSTEM. THE

BASIC SYSTEM CONTROLS UP TO 12 ZONE

DAMPERS, 3 HEATING STAGES, 3 COOLING

STAGES, AN INTEGRATED ECONOMIZER,
AND MODULATING VALVES FOR HOT WATER
AND CHILLED WATER. OPTIONAL UNITS

PROVIDE CONTROL OF

  UP TO  12ADDlTlONAL

ZONES, 5 STAGES OF ELECTRIC HEAT,
VARIABLE AIR VOLUME (VAV) SYSTEM FAN,
AND A FOURTH STAGE OF COOLING.

 Modulated DC voltage  signal from zone

thermostat, modified by zone discharge
sensor, provides direct control of
associated zone damper.

•i Pilot duty SPDT relays control heating

and cooling stages.

 Economizer uses  M745K  or  M745L  motor

to provide true  first  stage of cooling, using
outdoor air whenever possible.

•i System switches all stages off when

power is intermpted; switches all stages
on when power is restored. Compressor

turn  on time delays must be incorporated

for each compressor.

 Power supplies in W7080A  Load Analyzer

and  W7084A  Zone Adder are short-circuit
protected. Short circuits of 24 Vdc from

load analyzer or zone adder will not

damage their power supplies.

 Night setback and cooling shut-down for

individual or all zones by adding a time
clock.

HG/KH

Form  Number  63-4179

7/90

©  Honeywell   1990

Summary of Contents for W7080A

Page 1: ...s direct control of associated zone damper i Pilot duty SPDT relays control heating and cooling stages 0 Economizer uses M745K or M745L motor to provide true first stage of cooling using outdoor air whenever possible i System switches all stages off when power is intermpted switches all stages on when power is restored Compressor turn on time delays must be incorporated for each compressor 0 Power...

Page 2: ...ing and cooling demand from zone thermostats Analyzer is source cl 24 Vdc power for zone thermostats sensors and W7081A Limit Controller W7081A Limit Controller Ranco EA5 G3002 provides economizer control in addition to hot and cold deok selec table limik Saves energy by maintaining selected tempera ture limik of hot and cold d e c k s when zone demands are reduced For complete W7081A information ...

Page 3: ...The W7080A W7081A W7082A W7083A W7084A units each attach with four screws through mounting holes in the base saws not provided The 195325B Fourth Stage coding Board can be mounted on a Rat surface Sea in dividual specification sheets for mounting details UNDERWRfTERS LABORATORIES INC CCMPONENT RECOGNIZED Fib number SA481 Guide number SDFY2D applies to W7080A W7083A and 19253258 units only ADDITION...

Page 4: ... Valve Linkage Connects Modutrol motor to modulating hot or chilled water valves S963A Remote Mlnlmum PositIon Potentiometer Provides remote manual control of minimum open position of economizer motor Modulatlng Water Valves Use appropriate valve with Super Modutrol motor and Q618 Linkage to provide propor tional control of hot or chilled water flow Compressor Ambient Lockout Thermostat Use with d...

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