Electrical - Low Voltage Wiring - Carrier 50YFV Installation, Operation And Maintenance Instructions

R e s i d e n t i a l D i g i t a l P a c k a g e d U n i t s G T- P B S e r i e s - 6 0 H z P u r o n
R e v : 4 A p r i l , 1 4

Electrical - Low Voltage Wiring

Figure 25: GT-PB Low Voltage Field Wiring
Low Voltage Field Wiring
Accessory Connections
A terminal paralleling the compressor contactor coil
has been provided on the DXM2 control. Terminal "A" is
designed to control accessory devices. Note: This terminal
should be used only with 24 Volt signals and not line voltage.
Terminal "A" is energized with the compressor contactor (see
Figure 26).
The DXM2 controller includes two accessory relays ACC1
and ACC2. Each relay includes a normally open (NO) and
a normally closed (NC) contact. Accessory relays may be
confi gured to operate as shown in Tables 8a and 8b.
Table 8a: Accessory Relay 1 Confi guration
DIP 2.1 DIP 2.2
ON ON
OFF ON
ON OFF
ON ON
OFF ON
OFF OFF
OFF OFF
ON OFF
All other DIP combinations are invalid
28
DIP 2.3 ACC1 Relay Option
ON Cycle with fan
ON N/A for Residential Applications
ON Water valve – Slow opening
OFF Outside air damper
Whole House Dehumidifi cation
OFF
option – Dehumidistat
Whole House Dehumidifi cation
OFF
option – Humidistat
ON N/A for Residential Applications
OFF N/A for Residential Applications
Table 8b: Accessory Relay 2 Confi guration
DIP 2.4 DIP 2.5 DIP 2.6
ON ON ON
OFF ON ON
ON OFF ON
OFF OFF ON
ON ON OFF
All other DIP combinations are invalid
Figure 26: Accessory Connections
P2
AL2
R
NSB JW1
Alarm
Relay
C
ESD
OVR
Accessory
H
A
Terminal
P3
R
NO1
NC1
Accessory
Acc1
COM1
Relay
NO2
Relays
NC2
COM2
Acc2
R Relay
®
ACC2 Relay Option
Cycle with compressor
N/A for Residential Applications
Water valve – Slow opening
Humidifi er
Outside air damper
Micro
1
U1
Fault Status
Off On
JW3
Off On
S3
12
Off On
RV
Relay
CCH
1
Relay
S2
A0-1 A0-2
4
S1
Comp
Relay
CCG
P11 P10 P9
T1 T2 T2 T3 T3 T4 T4
AO2 Gnd T5 T5 T6 T6
Gnd
NC
HP
HP
LP
LP
LT1
LT1
LT2
LT2
RV
RV
CO
CO
P7
24Vdc
EH1
EH2
P6
CC