Wiring Subbase - Honeywell 7800 Series Installation Instructions Manual

EC7830A, RM7830A, EC7850A, RM7850A 7800 SERIES RELAY MODULES
Any relay module in the new 2000 series will only be able
to be installed on subbase Q7800A2005/U,
Q7800B2003/U and will not be backward compatible with
any Q7800A1003/U and Q7800A1005/U subbases
already installed in the field.
Fig. 1. Software revision location.
IMPORTANT
Make sure to check the relay model number and
the software revision level on the relay.
5. If you attempt to place a 2000 series relay on a non-
compatible 1000 series subbase, you will receive an
error code of 101. This indicates that you must a)
change out the subbase to a Q7800A2003/U or
Q7800A2005/U or b) choose a compatible 1000
series relay module

Wiring Subbase

WARNING
Electrical Shock Hazard or Equipment Damage
Hazard.
Can cause sever injury, death or equipment
damage.
Disconnect the power supply before beginning
installation. More than one disconnect may be
involved.
The internal block diagram of the EC/RM7830A is shown
in Fig. 2 and the internal block diagram of the
EC/RM7850A is shown in Fig. 3.
1. For subbase wiring and sequence charts, refer to Fig.
3 and 4.
2. For proper remote wiring of the KDM, refer to the
Specifications for the 2-line VFD KDM (65-0090),
the 4-line LCD KDM (32-00110), Data ControlBus
Module™ (65-0091) or Extension Cable Assembly
(65-0131).
32-00198—01
3. Disconnect the power supply from the main discon-
nect before beginning installation to prevent electri-
cal shock and equipment damage. More than one
disconnect can be required.
4. All wiring must comply with all applicable electrical
codes, ordinances and regulations. Wiring, where
required, must comply with NEC Class 1 (Line Volt-
age) wiring.
5. For recommended wire size and type, see Table 1.
6. Recommended wire routing of leadwires:
a. Do not run high voltage ignition transformer
wires in the same conduit with the flame
detector, Data ControlBus™ Module, or Remote
Reset Module wiring.
b. Do not route flame detector, Data ControlBus™
Module, or Remote Reset Module leadwires in
conduit with line voltage circuits.
c. Enclose flame detector leadwires without armor
cable in metal cable or conduit.
d. Follow directions in flame detector, Data Control-
Bus™ Module, or Remote Reset Module Instruc-
tions.
7. For recommended grounding practices, see Table 2.
8. The KDM is powered from a low voltage, energy lim-
ited source. Mount the KDM outside of a control
panel when it is protected from mechanical damage.
IMPORTANT
A 13 Vdc power supply must be used any time
more than one KDM is used. A maximum of two
KDM, Data ControlBus™ Modules or S7810B
Multi-Drop Switch Modules are allowed in any
combination.
9. Maximum wire lengths:
a. EC/RM7830A and EC/RM7850A leadwires: The
maximum leadwire length is 300 feet (91 meters)
to terminal inputs (Control, Running/Lockout
Interlock).
b. Flame Detector leadwires: The maximum flame
sensor leadwire length is limited by the flame
signal strength.
c. Remote Reset leadwires: The maximum length of
wire is 1000 feet (305 meters) to a Remote Reset
pushbutton.
d. Data ControlBus™ Module: The maximum Data
ControlBus™ Module cable length depends on
the number of system modules connected, the
noise conditions and the cable used. The maxi-
mum length of all Data ControlBus™ Module
interconnecting wire is 4000 feet (1219 meters).
10. Be sure loads do not exceed the terminal ratings.
Refer to the label on the relay module or to the
terminal ratings in Tables 3A, 3B, 3C and 3D.
4