Toptech TT-P-411 - TT-P-411 Single Stage Conventional Systems (Dual Transformer); TT-P-411 Single Stage Heat Pump System; TT-P-421 Conventional Systems (Single Transformer); TT-P-421 Wiring Diagram for 2 Stage Heat, 1 Stage Cool

cont.
Transformer Common
(See NOTE 1)
R Y1 E/W1 W2GO B C
1st Stage
Control
Emergency
Heat Control
Fan
Control
2nd Stage
Heat Control
24 VAC
Neutral
120 VAC
Hot
MODEL TT-P-421: Wiring Diagram for 2 Stage Heat, 1 Stage Cool
Reversing Valve
Active in Cooling
(See NOTE 3)
Reversing Valve
Active in Heating
(See NOTE 3)
See
NOTE 2
NOTE: 1. Transformer Common not required for battery-only operation of thermostat.
2. Jumper is required to use Auxiliary Heat for both Second Stage and Emergency Heat on units
without separate Emergency Heat and Auxiliary Heat terminals. 3. For units requiring reversing
valve to be energized during heating, connect reversing valve to B terminal. For units requiring
reversing valve to be energized during cooling, connect reversing valve to 0 terminal.
Wiring Diagrams
9
1st Stage
Heat Control
MODEL TT-P-421: Conventional Systems (Single Transformer)
Transformer Common (See NOTE)
R
0
B C Y1 E/W1 G W2
2nd Stage
Heat Control
Fan
Control
Cool
Control
NOTE: Transformer Common not required for battery-only operation of thermostat.
16
120 VAC
24 VAC
Neutral
Hot
©2010 Braeburn Systems LLC • All Rights Reserved • U.S. Patent 7,438,469 and other patents pending.
Made in China • TT-P-100-001
This warranty gives you specific legal rights and you may also have other rights that vary from
state to state or province to province. Answers to any questions regarding our limited warranty
may be obtained by writing our corporate offices.
Technical Assistance: www.braeburnonline.com
Call us toll-free: 866-268-5599 (U.S.) • 630-844-1968 (Outside the U.S.)
WARRANTY FACILITY: Braeburn Systems LLC
Attn: Warranty Department
2215 Cornell Avenue
Montgomery, IL 60538
Braeburn Systems LLC warrants each new TopTech thermostat against any defects that are
due to faulty material or workmanship. This warranty and our liability does not apply to
batteries, nor does it include damage to merchandise or the thermostat resulting from
accident, alteration, neglect, misuse, improper installation or any other failure to follow
Braeburn installation and operating instructions. This limited warranty applies for the duration
of the warranty period from the original date of purchase by a professional service technician.
Braeburn Systems LLC agrees to repair or replace at its option any TopTech thermostat under
warranty provided it is returned postage prepaid to our warranty facility in a padded carton
within the warranty period, with proof of the original date of purchase and a brief description
of the malfunction. This limited warranty does not include the cost of removal or
re-installation.
Programmable Thermostats
Store This Booklet for Future Reference
®