Installation - Honeywell 7800 Series Manual

RM7895A,B,C,D
SAFETY PROVISIONS • INSTALLATION
Self-Diagnostics add to the First-out Annunciation by
allowing the RM7895 to distinguish between field (external
device) and internal (system related) problems. Faults asso-
ciated within the flame detection subsystem, RM7895 or
Plug-in Purge Card are isolated and reported by the optional
Keyboard Display Module. See the 7800 SERIES System
Annunciation Diagnostics and Troubleshooting, form 65-
0118.
INTERLOCK REQUIREMENTS
The following interlock input is provided:
!
WARNING
FIRE OR EXPLOSION HAZARD CAN
CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH
To prevent possible hazardous burner operation,
verification of safety requirements must be per-
formed each time a control is installed on a burner.
WHEN INSTALLING THIS PRODUCT...
1. Read these instructions carefully. Failure to fol-
low them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and
marked on the product to make sure the product is suitable
for your application.
3. Installer must be a trained, experienced, flame safe-
guard service technician.
4. After installation is complete, check out the product
operation as provided in these instructions.
!
CAUTION
1. Disconnect the power supply before begin-
ning installation to prevent electrical shock and
equipment damage. More than one power sup-
ply disconnect may be involved.
2. Wiring connections for the RM7895 are unique;
therefore, refer to Figs. 7 or 8 or the correct
Specifications for proper subbase wiring.
3. Wiring must comply with all applicable codes,
ordinances and regulations.
4. Wiring, where required, must comply with NEC
Class 1 (Line Voltage) wiring.
5. Loads connected to the RM7895 must not ex-
ceed those listed on the RM7895 label or the
Specifications, see Table 1.
6. Limits and interlocks must be rated to carry and
break current simultaneously to the ignition
transformer, pilot valve, and main fuel valve(s).
7. All external timers must be listed or components
recognized by authorities who have jurisdiction
for specific purpose for which they are used.
Airflow Switch Interlock
This interlock is typically connected to an airflow
switch. The Airflow Interlock (ILK) input must close ten
seconds into PREPURGE or within the specified purge
card timing; otherwise, a recycle to the beginning of PRE-
PURGE or lockout will occur, depending on how the
airflow switch selectable jumper is configured (see Table 3
in Operation section). The RM7895B,D has an airflow
switch safe-start check feature. If the control input termi-
nal 6 is energized and the airflow switch is closed during
STANDBY, RM7895B,D will lockout after 120 seconds.
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 safe-
guard control and the main fuel valve(s).
2. Two Detectors can be connected in parallel with the
exception of Infrared Detectors (C7015).
3. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in
accordance with the instructions, may cause interfer-
ence to radio communications. It has been tested and
found to comply with the limits for a Class B computing
device of part 15 of FCC rules, which are designed to
provide reasonable protection against such interfer-
ence when operated in a commercial environment.
Operation of this equipment in a residential area may
cause interference; in which case, the user at their own
expense may be required to take whatever measures
are required to correct this interference.
4. This digital apparatus does not exceed the Class B
limits for radio noise of digital apparatus set out in the
Radio Interference Regulations of the Canadian De-
partment of Communications.
HUMIDITY
Install the RM7895 where the relative humidity never
reaches the saturation point. The RM7895 is designed to
operate in a maximum 85% RH continuous, noncondensing,
moisture environment. Condensing moisture may cause a
safety shutdown.
VIBRATION
Do not install the RM7895 where it could be subjected to
vibration in excess of 0.5G continuous maximum vibration.
WEATHER
The RM7895 is not designed to be weather tight. If
installed outdoors, the RM7895 must be protected by an
approved weather-tight, enclosure.
10

Installation