IOM / Rooftop Smart and Linéa™ Range - Page 57
USING THE T7300 THERMOSUSING THE T7300 THERMOS
USING THE T7300 THERMOSUSING THE T7300 THERMOS
USING THE T7300 THERMOS
TT
TT
T
AA
AA
A
TT
TT
T
TERMINAL DESIGNATION AND DESCRIPTIONS (continued)
a
: Some OEM models reverse the economiser terminal designation A1 and A2
b
: Some OEM models label the terminal for transformer common B
Standard terminal
designations
Alternate terminal
designations
Typical connection Function Terminal type
R V 24V system transformer Input -
RC - 24V cooling transformer Input -
RH - 24V heating transformer Input -
T, T - Remote sensor input for T7047 Input
W1 H1, R3 Auxiliary heat relay (Q7300 D) 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
XB
b
, C, X1, X2 Common Input
X1, X3 A, A1, A2, C, L, X, Z
User defined Light Emiting Diodes
(LEDs)
Annunciation -
X4 - LED Common Annunciation -
Y1 C1, M, Y
Stage 1 compressor contactor (Q7300
D)
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
- 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
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