Transcript
Thermostats—Electromechanical Non-Programmable T841 continued
Order Number T841A1696 EASY-TOSEETM
Application Heat Pump
Display, LED EM.HT., AUX.HT.
Electrical Ratings, Anticipator Setting Stage 2 fixed
Changeover Manual Cool or Heat
1 T841A1712 1 T841A1738
Multistage Heat Pump
T841B1000
Heat Pump
T841D1008
T841E1007
Multistage —for twostage gas valves.
Stage 2 0.1 to 1.2A, adj.
None
CHECKa, LO SPDc, HI SPD HI LOW
Terminal Designations O,L,G,R,E,X, W2,B,W1,Y
Switch Positions System EM.HT.HEATOFFCOOL
W1,W2,B, G,R,X,Y1,O
Stage 1 0.1 to 1.2A, adj. Stage 2 0 to 1.5A, fixed
R,G,B,W1, W2,Y
Finish
Comments
Taupe
For two-stage heating and one-stage cooling. Large raised markings. Audible click at each 2 degree setpoint change. For two-stage heating and one-stage cooling.
Taupe
W3,O,G,R,E,X, W2,B,Y W3,O,G,R,E, X,W2,B,Y
Stage 2 0.1 to 1.2A, adj. Stage 1 0.1 to 1.2A, adj.
Fan Auto Fan in EM.HT.
HEATOFFCOOL
EM. HT., Premier For two stage heating and HEATWhite one-stage cooling applicaOFFtions. COOL Classic For ‘‘No Emergency Heat’’ Beige applications.
G,R,W,L,B,X, O,Y1,Y2
Premier For two-speed cooling apWhite plications. For use on two-stage gas valve/one-stage cooling applications.
a CHECK LED indicates compressor malfunction. b EM.HT. LED also indicates compressor malfunction. c Low speed LED goes off when high speed comes on.
T874 Multistage and Heat Pump Thermostats Provide 24 Vac control of multistage heating, cooling, and heating-cooling systems including heat pump systems. 1 Require Q674 Thermostat Subbase to provide wiring terminals, mounting base, and system and fan switching. 1 Coiled bimetal elements operate dust-free mercury switches. 1 External levers and scale for temperature setting on top of thermostat case. ELECTRICAL RATINGS: 24 to 27 Vac. TEMPERATURE RATINGS: Scale Range: 42 F to 88 F (6 C to 31 C). Differential: 4 F (2 C) minimum between heating and cooling.
DIMENSIONS, APPROXIMATE: (including Q674 Subbase): 39⁄16 in. (91 mm) high, 55⁄8 in. (143 mm) wide, 23⁄16 in. (56 mm) deep. ACCESSORIES: 194559R Tamper-resistant Cover and Locking Lever Assembly with thermometer. Includes cover, screws, Allen wrench for locking cover, and two self-tapping insulated screws. 194559S Tamper-resistant Cover and Locking Lever Assembly without thermometer. Includes cover, screws, Allen wrench for locking cover, and two self-tapping insulated screws. 4074ECK Locking Lever Stops. C815A1005 Outdoor Thermistor. TG504A1025 or TG504A1033 Key Lock Cover with internal thermometer. See page 178. Thermostat Guards. See Index for page numbers.
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Thermostats—Electromechanical Non-Programmable *TRADELINE models. 1 SUPER TRADELINE models. Electrical Ratings, Anticipator Setting Stages Order Number T874A1010
Heating (adj)
Heat- Cooling ing Other Stage 1 1 1 — 0.1 to 1.2 A
Stage 2 —
Cooling (fixed) Stage 1 0 to 1.5 A
*T874A1036 1 T874A1150
T874A1176
0 to 1.0 A
*T874B1019 T874C1000 *T874C1018
2
2
0 to 1.2 A
1
0.1 to 1.2 A 0 to 1.5 A
T874C1125 T874C1141
0.1 to 1.0 A
1 T874D1165
*T874E1016 *T874F1015 T874F1155
2
— 2
T874G1204c,e
0.1 to 1.2 A 0 to 1.2 A
—
1
1
T874G1246c,e *T874G1626c
1a 1
T874N1016c T874R1152c,e T874W1015e
1b —
2 3d
1 2
— — 0.1 to 1.2 A 0.1 to 1.2 A — 0.1 to 1.0 A Fixed 0 to 1.0 A 0 to 1.0 A Fixed Fixed 0.1 to 1.2 A 0.1 to 1.0 A Fixed 0.1 to 1.2 A 0.1 to 1.2 A 0 to 1.5 A 0 to 1.0 A 0.1 to 1.2 A 0 to 1.2 A Fixed 0 to 1.5 A Fixed
Stage 2 —
Comments Includes locking cover with thermometer, non-adjustable range stop (limits max. heat to 72 F, limits min. cool to 78 F) and fieldadjustable locking levers. Includes locking cover with thermometer and field-adjustable locking levers. Includes locking cover with thermometer, field-adjustable range stops and field-adjustable locking levers. Meets DoD Specifications. Includes locking cover without thermometer, non-adjustable DoD range stop (limits max. heat to 72 F, limits min. cool to 78 F) and field-adjustable locking levers. 0 to 1.0 A Includes locking cover with thermometer and field-adjustable locking levers. — — Includes locking cover with thermometer and field-adjustable locking levers. Includes 12 F differential between stage one heating and stage two heating. Meets DoD Specifications. Includes locking cover without thermometer, non-adjustable DoD range stop (limits max. heat to 72 F, limits min. cool to 78 F) and field-adjustable locking levers. 0 to 1.0 A Includes locking cover with thermometer, field-adjustable range stops and field-adjustable locking levers. Includes locking cover with thermometer and field-adjustable locking levers. — Use in combination wood and oil systems. Replaces T874F1106. 0 to 1.2 A Use with Q674J1043 and C815A Outdoor Thermistor only. Use with Q674F1212 or Q674F1410 only. Use with Q674F1436 only. — — 0 to 1.0
Use with Q674F1220 only. Use with Q674L1207 only. Use with Q674B1216 and C815 Outdoor Thermistor only.
a Changeover operates in cooling mode. b Changeover operates in heating mode. c Heat pump thermostat. For replacement of other customer special heat pump thermostats and subbases contact your Honeywell Sales Representative and/or consult the T874/Q674 specification sheet, Honeywell form 60-2485 for replacement information and internal circuitry of specific models. In addition, you may want to refer to the Heat Pump Thermostat Cross Reference Guide, Honeywell form 70-6627. d Third stage of heating has anticipator range of 0 to 1.5A, fixed. e Available in Y594 pack. See model number index for specific page number.
Home Controls and Systems
T874 continued
