Honeywell T7300E 用户手册

63-4355—4

8

EB, EB

—

Q7300H L

ON

W

ORKS

® bus connection to L

ON

W

ORKS

® network.

Input, Output Communi-

cations

G

F

Fan relay.

Output

24V powered 
contact

O

R

Cooling changeover valve.

Output

24V powered 
contact

R

V

24V system transformer.

Input

—

RC

—

24V cooling transformer.

Input

—

RH

—

24V heating transformer.

Input 

—

T, T

—

Remote sensor input for T7047 or T7147.

Input

—

W1

H1, R3

Stage 1 heating relay (Q7300A,G,H) or auxiliary heat relay 
(Q7300C,D,H).

Output

24V powered 
contact

W2

H2, R4, W3, Y Stage 2 heating relay.

Output

24V powered 
contact

W3

—

Stage 3 heating relay.

Output

24V powered 
contact

X

B

b

, C, X1, X2

Common.

Input

X1, X3

A, A1, A2, C, 
L, X, Z

User defined Light Emitting Diodes (LED).

Annunciation —

X4

—

LED common.

Annunciation —

Y1

C1, M, Y

Stage 1 compressor contactor (Q7300C,D,H).

Output

24V powered 
contact

Y1, Y

RS, M

Stage 1 cooling compressor (Q7300A,G,H

c

,L).

Output

24V powered 
contact

Y2

C2

Stage 2 cooling compressor (conventional).
Stage 2 compressor contactor (heat pump).

Output

24V powered 
contact

Y3

—

Stage 3 cooling compressor.

Output

24V powered 
contact

BM

—

ML7984 Actuator connection (Q7300H

c

, L only); no call for heat, 

valve closed; call for stage 1 heat, valve approximately one-half 
open; call for stage 2 heat, valve fully open.

Output 

—

FC

—

Fan control transformer (Q7300H

c

, L only).

Input

—

GH

—

High-speed fan output (Q7300H

c

, L only); activate during calls for 

cooling.

Output

24V powered 
contact

GL

—

Low-speed fan output (Q7300H

c

, L only); activated on calls for heat 

and fan On selection.

Output

24V powered 
contact

P1, P2

—

Pump interlock relay (Q7300H

c

, L only); operates circulator pump in 

hydronic heat or energizes conventional heat system.

Input, Output 24V powered 

contact

RM

—

ML7984A Actuator connection (Q7300H

c

, L only); no call for heat, 

valve closed; call for stage 1 heat, valve approximately one-half 
open; call for stage 2 heat, valve fully open.

Output

—

—

C, H, L

HSII Control Panel.

—

—

—

O

Momentary circuit changeover.

—

—

—

P

Defrost.

—

—

—

R1, R2

Low- and high-speed fan relays.

—

—

—

T

External temperature readout, T-relay; outdoor thermistor.

—

—

a

Some OEM models reverse the economizer terminal designations A1 and A2.

b

Some OEM models label the terminal for transformer common B.

c

Applies only to Q7300H2037.