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RC-112BZ Two Speed Heat Pump 

3 Stage Heat / 2 Stage Cool - With Energy Efficient Control 

 Thermostat Installation Instructions 

 
APPLICATION 

 
This RC-112BZ thermostat is applicable to heat pumps with two stages of heating and cooling, plus a third 
stage of heating called "auxiliary" heating. The heat pump may have a two-speed compressor (low and high 
speeds), two compressors (stage 1 and stage 2) or a "superheater" or other device as the second stage. In normal 
operation, stage 1 and 2 (or low and high speed) will be used as required to maintain the set temperature. In 
heating mode, the auxiliary heating will only be used if the heat pump cannot maintain a rate of temperature rise 
with both stages running (high speed).  It has the capability of being controlled both locally and by remote 
control over a Z-Wave network.  It offers programmability, stand-alone operation, and communications with 
automation systems, utility control systems, or personal computers over a Z-Wave network.  The RC-112ZB is 
equipped with a “cool blue” backlight display. 
 
Electrical rating: 

 

24 V; 3 A; 50/60 Hz 

Maximum current: 

 

2 A on any circuit, 3 A total 

Thermostat operating current:  

less than 15 mA 

 
The following requirements must be observed for installation in Europe:  CE 
 

1.

 

This equipment 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 markings relating to safety must be translated to a language, which is 
acceptable in the country in which this equipment is to be installed. 

 

INSTALLATION 

 
Before installing this thermostat: 
 

1.

 

Read all of the installation instructions carefully. 

2.

 

Read the Owner's Manual carefully. 

3.

 

Ensure that this product is suitable for your application. 

4.

 

Ensure that wiring complies with all codes and ordinances. 

5.

 

Disconnect power to the control transformer to prevent electrical shock and damage to equipment. 

6.

 

Select an appropriate location to ensure an accurate temperature reading. 

 

Location 

 
When replacing an existing thermostat, install the RC-112BZ in the same location.  If the existing location 
doesn't meet the following criteria, choose a new location.  When choosing a location for the thermostat: 

 

Document Number 13I00-62 / Rev A / May, 2007 

Copyright 

©

 1999-2007 Home Automation, Inc.

 

All Rights Reserved

 

Summary of Contents for OMNISTAT RC-112BZ

Page 1: ...Maximum current 2 A on any circuit 3 A total Thermostat operating current less than 15 mA The following requirements must be observed for installation in Europe CE 1 This equipment must be installed i...

Page 2: ...ting thermostat 3 Disconnect the wires going to each terminal on the thermostat Label each wire with the letter or number at the terminal 4 Remove the existing plate or base from the wall MOUNTING Whe...

Page 3: ...tat push all excess wiring into the hole in the wall Plug the hole with the supplied insulating foam to ensure an accurate temperature reading by the thermostat Align the tabs of the thermostat face w...

Page 4: ...energized for cooling B Terminal is energized for heating In most applications the reversing valve is energized for cooling and should be connected to the O terminal If the heat pump requires the rev...

Page 5: ...5 5 Figure 5...

Page 6: ...6 2 To configure the display backlight to always be on set the JP2 Select Backlight Mode jumper to the ON position between the middle and bottom pin on the connector See Figure 6 3 To configure the di...

Page 7: ...a convenience to the installer the compressor start up protection delay can be canceled To cancel the delay press the Prog key 3 times then press the Fan key 2 times If the thermostat or system does n...

Page 8: ...ured with the following system options WITH NO EEC EEC 0 8 Auto changeover no fan with heat 1 9 Auto changeover fan on with heat 4 12 Manual changeover no fan with heat 5 13 Manual changeover fan on w...

Page 9: ...r displays add 16 to each value The default setting is 1 04 Calibration offset This item is used to raise or lower the current temperature reading by 1 degree Fahrenheit or 1 2 degree Celsius If this...

Page 10: ...nimum time set by this item When the cooling system turns off it must remain off for a minimum time set by this item Setting Cycles per hour maximum 5 6 6 5 7 4 8 3 7 10 3 The recommended setting is 8...

Page 11: ...tem operation before this reminder is displayed Days Counting down from 10 0 The filter reminder can be disabled by setting this item to 60 16 System runtime This week This item logs the amount of tim...

Page 12: ...System runtime This week 17 System runtime Last week WIRELESS COMMUNICATIONS WITH HAI CONTROLLER This thermostat has been preprogrammed with energy saving settings recommended under the EPA Energy St...

Page 13: ...r can set the mode get the current mode and get the modes supported by the thermostat COMMAND_CLASS_THERMOSTAT_SETPOINT Upon power up allow 10 seconds for the RC 112BZ thermostat to initialize After 1...

Page 14: ...and application version from the device COMMAND_CLASS_MANUFACTURER_SPECIFIC Upon power up allow 10 seconds for the RC 112BZ thermostat to initialize After 10 seconds a controller can request a Manufa...

Page 15: ...tween the equipment and receiver Consult the dealer or an experienced radio TV technician for help TROUBLESHOOTING TIPS SYMPTOM ACTION TO TAKE 1 Check power to the thermostat 2 Check wiring diagrams T...

Page 16: ...Pump is not able to meet load due to cold weather Aux Heat On Too Often 2 Thermostat is in EM Heat mode Set thermostat to Heat or Auto mode In EM Heat mode the auxiliary heat is turned on SYMPTOM ACTI...

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