Instruction/ maintenance manual of the product CT87A Honeywell
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® U.S. Registered Trademark Copyright © 2002 Honeywell All Rights Reserved 69-0274-6 Verify that you have the correct thermostat Using the compatibility chart below , verify that you purchased the correct CT87 Thermostat for your heating/cooling system.
CT87A,B,J ROUND® THERMOSTAT 69-0274-6 2 Prepare for installation 1. Carefully unpack your new thermostat; rough handling may affect it s accuracy . Save your receipt and identify the following parts: • CT87 Thermostat • Screws: two 1-in. sheet metal screws, two 1/2-in.
CT87A,B,J ROUND® THERMOSTAT 3 69-0274-6 5. Label the wires using the wiring labels that came with the CT87. Identify each wire using the letter of the terminal on th e old the rmo- stat (Fig.
CT87A,B,J ROUND® THERMOSTAT 69-0274-6 4 1. If using the cover ring: Position the cover ring again st the wall so that the arrow in the middle of th e cover ring is pointing up. 2. Position the wallp late or subbase . • If using cover ring : Place the wallplate/subbase over the cover ring.
CT87A,B,J ROUND® THERMOSTAT 5 69-0274-6 1. Place the cover ring against the outlet box so that the arrow in the middle of the cover ring is pointing up.
CT87A,B,J ROUND® THERMOSTAT 69-0274-6 6 Wire the thermostat 1. Use the wiring cross-reference table below to match each old thermostat wire with its corresponding terminal on the CT87 wallpl ate or subbase. See Fig. 8 through 13 wiring diagrams. *Never attach wires to both the B and O terminals.
CT87A,B,J ROUND® THERMOSTAT 7 69-0274-6 Fig. 8. CT87A for a 2-wire heat ing only system. Fig. 9. CT87A for a 3-wire hot water heating only system . Fig.
CT87A,B,J ROUND® THERMOSTAT 69-0274-6 8 Fig. 1 1. CT87B for a 5-wire heating /cooling system. Fig. 12. CT87J for a 4-wire single stage heat pump. Fig.
CT87A,B,J ROUND® THERMOSTAT 9 69-0274-6 Mount the thermostat 1. Pull off the thermostat cover and discard the red plastic insert that holds the mercury switch in place during shipping. 2. Using a pencil po int, slide the heat anticipator indicato r to 1.
CT87A,B,J ROUND® THERMOSTAT 69-0274-6 10 Set the heat anticipator for your system IMPORT ANT : Setting th e heat anticipator allows the thermostat to maintain accurate temperature control. 1. Using a pencil point, move the heat anticipator pointer to the numbe r that you recorded in S tep 3, su b- step 3.
CT87A,B,J ROUND® THERMOSTAT 1 1 69-0274 -6 Check cooling IMPORT ANT : T o a void damaging the compressor in the air conditioner , do not operate the cooling system when the outdoor temp erature is below 50°F (10°C). 1. If your CT87 has a subbase, set the System switch on the left to Cool.
CT87A,B,J ROUND® THERMOSTAT 69-0274-6 G .H. Rev . 08-02 www .honeywell.com/yourhome Automation and Control Solutions Honeywell Honeywell Limi ted-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 Printed in U.
An important point after buying a device Honeywell CT87A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
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If you already are a holder of Honeywell CT87A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell CT87A.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell CT87A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell CT87A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
