T7200D,E, T7300D,E,F AND Q7300 SERIES 2000 PROGRAMMABLE COMMERCIAL THERMOSTATS AND SUBBASES
63-4355—48
EB, EB —Q7300H LONWORKS® bus connection to LONWORKS® 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
XBb, 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,Hc,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 (Q7300Hc, 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 (Q7300Hc, L only). Input —
GH —High-speed fan output (Q7300Hc, L only); activate during calls for
cooling.
Output 24V powered
contact
GL —Low-speed fan output (Q7300Hc, L only); activated on calls for heat
and fan On selection.
Output 24V powered
contact
P1, P2 —Pump interlock relay (Q7300Hc, L only); operates circulator pump in
hydronic heat or energizes conventional heat system.
Input, Output 24V powered
contact
RM —ML7984A Actuator connection (Q7300Hc, 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. ——
—PDefrost. ——
—R1, R2 Low- and high-speed fan relays. ——
—T External temperature readout, T-relay; outdoor thermistor. ——
Table 6. Terminal Designations and Descriptions. (Continued)
Terminal Designations
Typical Connection Function Termina l
TypeStandard Alternate
aSome OEM models reverse the economizer terminal designations A1 and A2.
bSome OEM models label the terminal for transformer common B.
cApplies only to Q7300H2037.