Models
CT50A/CT53A/CT51A
•
Easy to install & use
•
Quiet switching
CT51A Heating & Cooling
• For central gas or oil heating,
electric furnaces & central electric cooling
• Use in single transformer systems only
• 4 wires
CT50A Heat Only
• For central gas or oil heating
• 2 wires
CT53A Heat Only
• For 750 millivolt
heating systems
• 2 wires
Standard Manual Thermostats
© 2002 All Rights Reserved.
Honeywell,Inc.
1985 Douglas Drive North
Golden Valley,MN 55422 Form No. 50-8901
On
Fan
Auto
Heat
O
ff
C
o
o
l
Standard
Manual
Thermostats
Features:
Specifications (US & Canada):
Compatibility:
Package UPC (US & Canada):
Model CT50A CT51A
Master Carton
Qty 6 6
Dim.WxHxD(in.) 6
3
/
4 x 9
1
/
2 x 16
1
/
4 6
3
/
4 x 9
1
/
2 x 16
1
/
4
Carton Wt.(lbs.) 3 3
Cu.Ft. .6 .6
Retail Package
Qty 1 1
Dim.WxHxD(in.) 6
1
/4 x 9 x 23/4 61/4 x 9 x 23/4
Unit Wt.(lbs.) .6 .6
Cu.Ft. .09 .09
CT50A CT51A CT53A
Gas or Oil Heat - 2 wires XX-
Gas or Oil Heat with Cooling - 4 or 5 wires - X Hot Water - 2 Wire Zone Valves (R,W) XX-
Hot Water - 3 Wire Zone Valves (Series 20) - - Gravity - Hot Air (no blower fan) XX-
Hot Water (no circulation pump) - Steam XX-
Electric Furnace - X Millivolt - Standing Pilot Gas Heat - 2 wires - - X
Single Stage Heat Pump (without Auxiliary Heat) - - Multi Stage Heat Pump (with Auxiliary Heat) - - Line Voltage Electric Heat (Baseboard 120-240V) - - Central Air Conditioning (Electric) - X -
CT50A
• Heat only
• For central gas or oil heating
• 2 wires
CT51A
Manual
• Heating & cooling
• Used for central gas or oil
heating,electric furnaces &
central electric cooling
• Use in single transformer
systems only
•4 wires
CT53A
Manual
• 750 millivolt
heating systems
• 2 wires
Model CT53A
Master Carton
Qty 6
Dim.WxHxD(in.) 6
3
/4 x 91/2 x 161/4
Carton Wt.(lbs.) 3
Cu.Ft. .6
Retail Package
Qty 1
Dim.WxHxD(in.) 6
1
/4 x 9 x 23/4
Unit Wt.(lbs.) .6
Cu.Ft. .09
CT50A
CT51A CT53A
CT51A – Canada
00
85267 87016
CT50A – Canada
02
85267 04136
CT50A – US
03
85267 87015
CT53A – US
04
85267 87018
CT53A – Canada
00
85267 04143
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