HAI Omnistat RC-120 Installation Manual Download Page 1

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O M N I S T A T

ELECTRONIC COMMUNICATING THERMOSTAT

Installation Manual

RC-120 Two Stage Heat/Cool

2 Stage Heat / 2 Stage Cool

Document Number 13I00-7

January, 1997

Summary of Contents for Omnistat RC-120

Page 1: ...O M N I S T A T ELECTRONIC COMMUNICATING THERMOSTAT Installation Manual RC 120 Two Stage Heat Cool 2 Stage Heat 2 Stage Cool Document Number 13I00 7 January 1997...

Page 3: ...1 LOCATION 2 REMOVING AN EXISTING THERMOSTAT 2 MOUNTING 3 TYPICAL WIRING DIAGRAMS 6 POWER UP 8 DISABLE KEYS 9 INSTALLER SETUP 9 OWNER S MANUAL 14 QUICK REFERENCE SETUP GUIDE 15 REMOTE SYSTEM WIRING D...

Page 4: ...ent must be installed in accordance with National wiring rules for the country in which it is installed 2 Fuses must be replaced only with IEC rated components 3 All product labels instructions and ma...

Page 5: ...at the thermostat is located in an area where there is adequate air circulation 3 Do not mount in the path of direct sunlight or of radiant heat generated by appliances 4 Do not mount behind an outdoo...

Page 6: ...is upright and facing you 1 Mark the two mounting holes on the wall using a pencil 2 Drill a hole using a 3 16 bit at each mounting hole marking 3 Install the two wall anchors supplied 4 Slide the sys...

Page 7: ...at wiring If a remote system is being used with the thermostat connect the remote system wiring to the supplied cable using the wire splices per the diagram for your remote system application See Figu...

Page 8: ...hermostat face into the thermostat base locking it into place See Figure 3 Figure 3 Mounting thermostat face to thermostat base Note Be sure that the thermostat temperature sensor is standing up and t...

Page 9: ...at 2 Do not short cooling or heating relays or fan relay even momentarily This will blow a non replaceable fuse 3 Do not attempt to hook up to live circuits An accidental connection to a component on...

Page 10: ...TAGE TRANSFORMER 24VAC 1 2 3 4 5 6 7 8 W1 Y1 COOLING 1ST STAGE 24VAC HOT 24VAC COMMON TWO STAGE HVAC SYSTEM RC 120 W1 Y1 C Y2 G R 24VAC HOT FAN 24VAC COMMON 1ST STAGE NOT USED COOLING COOLING 2ND STAG...

Page 11: ...e the desired temperature 3 degrees over the current temperature Stage 2 heat should come on Set the mode to OFF Ensure that the heat unit goes off 5 Set the Mode to COOL Use the up arrow key to raise...

Page 12: ...p mode is used to configure the general operating parameters of the thermostat When in Installer Setup mode 1 The small digits on the top of the display are the item number 2 The large blinking digits...

Page 13: ...Mode 0 or 1 and you are installing more than one thermostat each must be set to a consecutive address starting at 1 The default address setting is 1 An address from 1 127 may be selected 01 Communicat...

Page 14: ...he default setting is 0 03 Display options The thermostat can be configured to display the following attributes 0 Celsius am pm time format programmable 1 Fahrenheit am pm time format programmable 2 C...

Page 15: ...default setting is 30 05 Cool setpoint limit This item is used to limit the temperature setting in cool mode The desired cool setting can never be set below this setting The default setting is 51 06 H...

Page 16: ...etting of 3 or 4 may be used when precise control of temperature is not as important as highest energy efficiency however the thermostat will not be able to maintain temperature within 1 degree of its...

Page 17: ...em runtime This week This item logs the amount of time hours that the heating and cooling system was in operation this week 17 System runtime Last week This item logs the amount of time hours that the...

Page 18: ...iption Default Current 00 Address 1 01 Communication mode 1 02 System options 0 03 Display options 1 04 Calibration offset 30 05 Cool setpoint limit 51 06 Heat setpoint limit 91 07 Not used 08 Not use...

Page 19: ...at setting status of fan and hold and other items Run a 3 or 4 conductor wire from the HAI system to the thermostat location All thermostats on an Omni OmniPro and Aegis controller are connected to Zo...

Page 20: ...ications mode must be set to 24 Run a two conductor wire from the remote system or remote switch to the thermostat location Make the connections using supplied wire splices See Figure 8 Red and yellow...

Page 21: ...ostat REMOTE is displayed when system is overriding thermostat Disconnect the cable from COMM connector to test SYMPTOM ACTION TO TAKE Can t Adjust Temperature 1 Mode is Off Select Heat Cool or Auto 2...

Page 22: ...on to display o F or o C After installation allow the thermostat up to 30 minutes for an accurate temperature reading SYMPTOM ACTION TO TAKE Display Problem 1 Disconnect power to the thermostat Reconn...