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

Weather
The relay module is not designed to be weather tight.
When installed outdoors, protect the relay module in an
approved weather-tight enclosure.

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.
(RM7838C: mount inside cabinet only to meet CE
.
requirements) The Q7800 can be mounted directly
in the control cabinet; be sure to allow adequate
clearance for service, installation, access or removal
of the RM7838B,C, Expanded Annunciator, KDM,
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; then
drill the pilot holes.
4. Securely mount the subbase using four no. 6 screws.
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.
Series 1000 Relay Modules
All relay product codes that start with a 1 (example:
RM7838C1020/U) can be used with existing subbase
Q7800A1003 and Q7800A1005.
Series 2000 Relay Modules
All relay product codes that start with a 2 (example:
RM7838C2020/U) must be used with subbase
Q7800A2003 and Q7800A2005.
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
RM7838B,C 7800 SERIES RELAY MODULE
newly purchased. This includes (Q7800A1005
Q7800B1003), and the 2000 Series subbases
(Q7800A2005, Q7800B2003).
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, Q7800B2003
and will not be backward compatible with any
Q7800A1003 and Q7800A1005 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 or Q7800A2005 or b)
choose a compatible 1000 series relay module.
3 32-00199—01