Honeywell Heat/1Cool User Guide - Page 83

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LENNOX

HP16, HP18, HP19, HP20, HP21, HP22

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T874C1448/Q674L1355(24F5101/31F3201)

T874C1448/Q674L1165(24F5101/24F5901)

T874G1014/Q674F1113(24F5801/24F6201)

T874G1154/Q674F1105

T874R1178/Q674L1355(24F5601/31F3201)

T874R1178/Q674L1165(24F5601/24F5901)

T8141A1089

T8611G1053 (27H3001)

T8011R1006

T8011R1014

Function

Existing

Terminals

T841A1712

T8611R1000

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8611G2002

T8611G2028

PC8900/

W8900B1002

Electromechanical

Chronotherm

®

III

Electronic Replacement or Upgrade

A

Configure O/B (select models) in Installer Setup.

B

Optional LED indication activated with completed circuit on X1 and

X2 terminals.

C

Not on HP18 or HP20.

D

Tape off. Not used.

E

Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

F

R8222B1067 Relay required to operate system monitor light (emergency

heat LED) on TRADELINE replacement thermostats, see page 10. Tape off

if LED indication is not desired.

Common

G

Power

Compressor

1st Stage

Heat

Auxiliary

Heat

Fan

C/O Valve

Heat

C/O Valve

Cool

System Monitor/

System Defrost

F

EM. Heat

Multiple Aux.

Heat Loads

E

Thermistor

LED

Indication

M13165

G

Terminal X (X2 or C) must be connected to transformer common.

H

Do not remove factory-installed jumper.

I

If separate transformers are used, replace with one 75 VA transformer as

shown on page 78.

J

When W2 is not used, configure W2 cycle rate to NC.

K

If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

L

LED is energized when terminal is powered.

M

L terminal is powered continuously in Emergency Heat Position.

H

H

H

H

A

A

A

A

A

A

F

H

K

J

K

K

K

K

L

M

L

M

M

L

C

B

B

K

H

H

D

L

B

I

Chronotherm

IV

X

or

X2

or

C

or

X

X

X

X

C

C

C

C

C

C

V

or

VR

or

R

R

R

R

R

R

R

R

R

R

M

or

Y

Y

Y

Y1

Y1

or

Y

Y

Y1

Y

Y1

Y1/W1

–

–

W1

W1

W1

W1

W1

W1

W1

–

Y

or

W

or

W2

W2

W2

W2

W2

W2

W2

W2

W2

Aux.

F

or

G

G

G

G

G

G

G

G

G

G

–

or

B

B

B

B

B

B

B

or

O/B

B

B

or

O/B

O/B

R

or

O

O

O

O

O

O

O

or

O/B

O

O

or

O/B

O/B

L

L

L

L

L

L

L

L

E

E

E

E

E

E

E

E

E

E

W3

W3

W3

W3

A

–

–

–

–

–

–

–

–

–

X1

or

X2

–

X2

X1

X2

X1

X2

–

–

–

X1

X2

–

Y594R1425

Y594G1419

Y594G1476

Honeywell Heat/1Cool User Guide - Page 83

HP16, HP18, HP19, HP20, HP21, HP22

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