Mounting Wiring Subbase; Relay Module And Subbase Compatiblity; Wiring Subbase - Honeywell 7800 Series Installation Manual

Mounting of Remote Keyboard or
Reset Module
To comply with CE EN60730 for remote mounting of the
KDM and/or Remote Reset Module it is necessary to
provide electrical separation using insulation at least
equivalent to double or reinforced insulation.
This can be accomplished by either:
1. Optically isolating the communication and/or
remote reset lines from the control cabinet.
2. Providing physical separation from the communica-
tion and/or remote reset lines using electrical con-
duit and a 204718A Remote Display Cover Assembly
or other suitable enclosure that meets IP40 class of
protection.

Mounting Wiring Subbase

1. Mount the subbase in any position except
horizontally with the bifurcated contacts pointing
down. The standard vertical position is
recommended. Any other position decreases the
maximum ambient temperature rating.
2. Select a location on a wall, burner or electrical panel.
The Q7800 can be mounted directly in the control
cabinet. Be sure to allow adequate clearance for
servicing, installation, access or removal of the
RM7885A, expanded annunciator, keyboard display
module, flame amplifier, flame amplifier signal
voltage probes, run/test switch, electrical signal
voltage probes and electrical field connections.
3. For surface mounting, use the back of the subbase
as a template to mark the four screw locations. Drill
the pilot holes.
4. Securely mount the subbase using four no. 6 screws
(not provided).
NOTE: You might receive an error code 101 (via KDM) if
one of the following conditions exist:
a. The screws securing the relay to the subbase are
not tight enough, re-tighten to insure there is no
gap between the relay and the subbase.
b. If you attempt to place a 2000 series relay on a
non-compatible 1000 series subbase, this indi-
cates that you must:
• Change out the subbase to a Q7800A2003/U
or Q7800A2005/U
• Choose a compatible 1000 series relay
module
Relay Module and Subbase
Compatiblity
NOTE: There are several different subbase models that
can be purchased. It is important to note which
subbase is compatible with the relay module
when purchasing new, repair or replacement
parts.
RM7885A 7800 SERIES RELAY MODULES
Series 1000 Relay Modules
All relay product codes that start with a 1 (example:
EC7820A1026/U) can be used with existing subbase
Q7800A1003/U and Q7800A1005/U.
Series 2000 Relay Modules
All relay product codes that start with a 2 (example:
EC7820A2026/U) must be used with subbase
Q7800A2003/U and Q7800A2005/U.
Subbase Compatibility
Any Relay Module in the 1000 Series with a Software
Revision level number starting with a "5" or greater will be
compatible with all subbase models both installed and
newly purchased. This includes (Q7800A1005/U,
Q7800B1003/U), and the 2000 Series subbases
(Q7800A2005/U, Q7800B2003/U).
See Fig. 1 for Software Revision Level number location on
the label (located on the rear of the relay module).
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.
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.
Can cause severe injury, death or equipment
damage.
Disconnect the power supply before beginning
installation.
The internal block diagram of the RM7885A is shown in
Fig. 1.
3 32-00215—01