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Model

 Wiring Terminals on Thermostat 

 

Location of Unit 

Terminals

W2

(2-stage ONLY)

G

W

C

HD/HDB, HDS/HDC,  

PTS/BTS

W2

G

W1

C

R

Ignition control in unit 

control compartment

 W
iring T

erminals on Unit 

 

PTC

n/a

T2

F

T1

Terminal board on 

external junction box

PDP/BDP

Gas valve high stage 

(HI, 3, or A)

T2

G

T1

Terminal board on 

external junction box

DFG, IFG, DFP, IFP

Gas valve high stage 

(HI, 3, or A)

Fan relay by others or to 

factory relay wire removed 

from T or H

T

G

H

Terminal board on 

external junction box 

(Digit 13=4 Only)

DFG, IFG, DFP, IFP, DFS, 

IFS, HFG, OFG, HFP, OFP

3

Factory time delay relay 

wire removed from 4

4

2

1

Terminal strip in control 

compartment (Digit 

13=0, 1, 2, or 3)

6-436.9 

5H76292A

 

Honeywell TH5220D1003 thermostat wiring for gas  

unit heaters HD/HDB, HDS/HDC, PTS/BTS, PTC, PDP/BDP, and  

duct furnaces “D”,  “H”,  “I”, & “O” series

August, 2009

Wiring Diagram Selection

  For gas fired unit heaters and duct furnaces (non-factory 

supplied blower) with model numbers shown above, refer to 
Figure 1.1 and Table 1.1 for correct unit to thermostat wiring.

  For all other system units (factory supplied blower), refer to  

the job specific unit wiring diagram provided with the unit.

  For deviations to these wiring diagrams or the job specific    

wiring diagrams, consult the factory. 

Installation and Wiring

Installation of wiring must conform with local building codes, 
or in the absence of local codes of the National Electric Code 
ANSI/NFPA 70 - Latest Edition. Unit must be electrically 
grounded in conformance to this code. In Canada, wiring must 
comply with CSA C22.1, Part 1, Electrical Code.

Figure 1.1 - Terminals on Thermostat

(See page 2 for Thermostat Function Programming Instructions)

WARNING

1.  Disconnect power supply before making wiring connections 

to prevent electrical shock and equipment damage.

2.  All units must be wired strictly in accordance with wiring 

diagram furnished with the unit. Any wiring different from 

the wiring diagram could result in a hazard to persons and 

property.

3.  All wiring must be done with a wiring material having a 

temperature rating of at least 105°C.

ImpoRtANt

1.  The use of this manual is specifically intended for a 

qualified installation and service agency. All installation 

and service of these kits must be performed by a qualified 

installation and service agency.

2.  These instructions must also be used in conjunction with 

the Installation and Service Manual that originally shipped 

with the appliance, in addition to any other accompanying 

component supplier literature.

  Not all terminal connections are used.  Table only shows terminals that are used for required heating operation. 

 

 

  The factory installed R to Rc terminal wire jumper is to remain in place.

➂ 

Verify that the buss bar on the G terminal is removed.

 Verify that the buss bar between the T2 and F terminal is removed. 

 

 

 

 

Table 1.1 - Thermostat to Unit Wiring

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