Honeywell YCT87K1003 Installation Instructions

Honeywell YCT87K1003 - Round Heat Only Mercury Free Thermostat System Manual

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  • Honeywell YCT87K1003 | Installation Instructions - Page 1
    . If you are unsure which model is right for your system, visit www.honeywell.com/ yourhome or call Honeywell Customer Care at 1-800-468-1502. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only: Gas or oil fueled warm air, steam, or hot Yes water
  • Honeywell YCT87K1003 | Installation Instructions - Page 2
    Installation Instructions and the Installation Quick Guide. • Wiring labels 2. Gather these tools: Required Tools • Flat blade screwdriver • Spirit level Optional Tools • Hand or power drill with 1/16-in. drill bit • Wire cutter/stripper or sharp knife • Pencil 3 Remove the old thermostat
  • Honeywell YCT87K1003 | Installation Instructions - Page 3
    in a sealed tube. 4 Install the cover ring and wallplate or subbase If installing on the wall Refer to Fig. 4 as you work. Fig. 4. Installing wallplate/subbase on the wall (wallplate shown). COVER RING WALLPLATE NO. 4 X 1 INCH SHEET METAL SCREWS (2) 3 THERMOSTAT WIRING OPENING M20188 69-0274-6
  • Honeywell YCT87K1003 | Installation Instructions - Page 4
    subbase directly to the wall: Position so that the fan and heating/cooling switches are on the top. 3. Use a pencil to Installing wallplate/subbase on an outlet box (subbase shown). 1/2 IN. BINDING HEAD SCREW (2) OUTLET BOX 1 2 COVER RING SUBBASE 1/4 IN. ROUND HEAD SCREW (2) A THERMOSTAT WIRING
  • Honeywell YCT87K1003 | Installation Instructions - Page 5
    ROUND® THERMOSTAT 1. Place the cover ring against the outlet box so that the arrow in the middle of the cover ring is pointing up. 2. Pull the wires through the wiring the Heat and Fan indicators. Fig. 6. Leveling the wallplate. SPIRIT LEVEL LEVELING POSTS (2) OPENING FOR THERMOSTAT WIRING
  • Honeywell YCT87K1003 | Installation Instructions - Page 6
    CT87A,B,J ROUND® THERMOSTAT 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 wallplate or subbase. See Fig. 8 through 13 wiring diagrams. Wiring Cross-reference Wire Label R, RH, 4, V Rc, R W, W1,
  • Honeywell YCT87K1003 | Installation Instructions - Page 7
    CT87A,B,J ROUND® THERMOSTAT Fig. 8. CT87A for a 2-wire heating only system. CT87A WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87A for a 3-wire hot water heating only system. R Y W CT87A WALLPLATE WIRE LABELS (LETTERS ON ORIGINAL THERMOSTAT TERMINALS) R 3-WIRE W HOT WATER ZONE
  • Honeywell YCT87K1003 | Installation Instructions - Page 8
    CT87A,B,J ROUND® THERMOSTAT Fig. 11. CT87B for a 5-wire heating/cooling system. COOL • OFF • HEAT FAN ON RH G RC Y W AUTO • CT87B SUBBASE HEATING POWER FAN TO SYSTEM COOLING POWER TO SYSTEM COOL HEAT Fig. 12. CT87J for a 4-wire single stage heat pump. M20225 COOL • OFF • HEAT FAN
  • Honeywell YCT87K1003 | Installation Instructions - Page 9
    ROUND® THERMOSTAT 7 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 point, slide the heat These screws complete the installation of the thermostat. Fig. 15. Tightening mounting screws. CAPTIVE
  • Honeywell YCT87K1003 | Installation Instructions - Page 10
    CT87A,B,J ROUND® THERMOSTAT 8 Set the heat anticipator for your system IMPORTANT: Setting the heat anticipator allows the thermostat to maintain accurate temperature control. 1. Using a pencil point, move the heat anticipator pointer to the number that you recorded in Step 3, sub-step 3. If you
  • Honeywell YCT87K1003 | Installation Instructions - Page 11
    CT87A,B,J ROUND® THERMOSTAT Check cooling IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling system when the outdoor temperature is below 50°F (10°C). 1. If your CT87 has a subbase, set the System switch on the left to Cool. IMPORTANT: After heating is
  • Honeywell YCT87K1003 | Installation Instructions - Page 12
    CT87A,B,J ROUND® THERMOSTAT Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the
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fi 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 CT87Thermostat for
your heating/cooling system. If
you are unsure which model is
right for your system, visit
www.honeywell.com/
yourhome
or call Honeywell
Customer Care at
1-800-468-1502.
* CT87A is compatible with 2-wire cooling-only systems.
Heating/Cooling system
Compatible with:
CT87A
CT87B
CT87J
Heating only:
Gas or oil fueled warm air, steam, or hot
water heat
Yes
Yes
No
Cooling only:
Electric air conditioning
Yes*
Yes
Yes
Heating and cooling:
Gas or oil fueled warm air,
steam, or hot water heat with electric air conditioning
No
Yes
No
Single stage heat pump:
Outdoor heating/cooling unit
(compressor) with no auxiliary or backup heat.
No
No
Yes
Electric heat furnace with or without cooling:
No
No
Yes
Electric baseboard:
Electric heating strips located just
above the floor, usually 120-240 volts
No
No
No
Multistage:
A conventional system with more than one
stage, or an outdoor heating/cooling unit (compressor)
with auxiliary or backup heat.
No
No
No
1
CT87A,B,J Round
fi
Thermostat
LOW VOLTAGE (15 TO 30 VAC),
THERMOSTAT AND MOUNTING HARDWARE
Installation Instructions