Honeywell 7800 Series Installation Instructions Manual page 12

RM7888A 7800 SERIES RELAY MODULE
IMPORTANT:
1. For on-off gas-fired systems, some authorities
who have jurisdiction prohibit the wiring of any
limit or operating contacts in series between the
flame safeguard control and the main fuel valve(s).
2. Two detectors can be connected in parallel, with
the exception of the Solid State detectors (C7915,
C7927, C7962 and C7961).
3. This equipment generates, uses and can radiate
radio frequency energy, and if not installed and
used in accordance with the instructions, may
cause interference to radio communications. It
has been tested and found to comply with the lim-
its for a Class A computing device of part 15 of
FCC rules, which are designed to provide reason-
able protection against such interference when
operated in a commercial environment. Operation
of this equipment in a residential area may cause
interference, in which case the users, at their own
expense, may be required to take whatever mea-
sures are required to correct this interference.
4. This digital apparatus does not exceed the Class A
limits for radio noise of digital apparatus set out in
the Radio Interference Regulations of the Cana-
dian Department of Communications.
5. RM7888A cannot be connected in parallel without
isolation circuits to isolate input and output cir-
cuits.
Humidity
Install the RM7888A where the relative humidity never
reaches the saturation point. The RM7888A is designed to
operate in a continuous, noncondensing moisture
environment with a maximum 85 percent relative
humidity. Condensing moisture can cause a shutdown.
Vibration
Do not install RM7888A where it could be subjected to
vibration in excess of 0.5G continuous maximum
vibration.
Weather
The RM7888A is not designed to be weather tight. If
installed outdoors, the RM7888A must be protected by an
approved weather-tight enclosure.
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:
RM7840G1014/U) can be used with existing subbase
Q7800A1003/U and Q7800A1005/U.
32-00214—01
Series 2000 Relay Modules
All relay product codes that start with a 2 (example:
RM7840G2014/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. 9. 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.
Mounting Wiring Subbase
NOTE: For installation dimensions, see Fig. 1.
1. Mount the subbase in any position except horizon-
tally 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 in an electrical
panel. The Q7800 can be mounted directly in the
control cabinet. Be sure to allow adequate clearance
for servicing, installation, access and removal of
RM7888A, dust cover, flame amplifier, flame ampli-
fier signal voltage probes, 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.
12