Honeywell RM7840L1075 Installation Instructions Manual

RM7800L1087, RM7840G1022, RM7840L1075, EC7840L1014
RM7800L2087, RM7840G2022, RM7840GL2075, EC7840L2014
Relay Modules with Valve Proving
APPLICATION
The Honeywell RM7800L/40G,L and EC7840L Relay
Modules are microprocessor-based integrated burner
controls for automatically fired gas, oil, or combination fuel
single burner applications. The RM7800L/40G,L and
EC7840L Relay Modules are used for UL/CSA Modulating
and FM/IRI Modulating burner applications. The
RM7800L/40G,L, EC7840L system consists of a Relay
Module. Keyboard Display Modules (standard with
RM7800), Dust Cover (standard with RM7840/EC7840L),
Subbase, Amplifier, and Purge Card. Options include DATA
CONTROLBUS MODULE™, Remote Display Mounting,
First-Out Expanded Annunciator and Modbus™
communications capable.
Functions provided by the RM7800L/40G,L, EC7840L
include automatic burner sequencing, flame supervision,
system status indication, system or self-diagnostics and
troubleshooting.
Using the S7800A2142 Keyboard Display (standard on
RM7800L2087) the following features can be set up:
• Post Purge time—Up to 60 minutes—Device shipped
with 15 seconds Post purge.
• Valve Proving features including:
— VPS test time
— When (Never, Before, After, Split or Both)
• See S7800A1142 Instructions (65-0288), also see
S7800A2142 Instructions. Series 5 can be
programmed for Modbus communication.
At commissioning time, the Valve Proving System may be
scheduled to occur at one of five different times:
• Never—Device default as received—Valve proving
does not occur.
• Before—Valve proving before run concurrent with Pre-
Purge.
• After—Valve proving occurs after the Run state,
before the device goes to Standby (Concurrent with
Post-Purge, if selected.)
honeyvell.energy
SIL
Capable
INSTALLATION INSTRUCTIONS
• Both—Valve proving occurs at both times Before and
After, noted above.
• Split—The main valve 2 (MV2) (high pressure) seat
test is performed at the Before time and the main
valve 1 (MV1) (low pressure) seat test is performed
during the After time.
The following assumptions apply when using the
RM7840G,L, RM7800L, EC7840L:
MV1
VP
SW.
INLET
1
1 CAUTION: VALVE ENERGIZING TIMING IS BASED ON HONEYWELL VALVE
OPENING TIMES OF 13 SECONDS MAXIMUM.
− FOR VALVES WITH TIMINGS GREATER THAN 13
SECONDS OR THOSE THAT DO NOT OPEN THE ACTIVE
VALVE WITHIN THE ENERGIZED TIME, A BYPASS SSOV
RATED SOLENOID VALVE (1/4", 120 VAC) IS REQUIRED TO
OBTAIN THE PROPER TEST PRESSURES.
− THE BYPASS VALVE WILL BE WIRED IN PARALLEL TO THE
VALVE IT IS BYPASSING (TERMINAL 9 FOR MV1 OR
TERMINAL 21 FOR MV2).
Fig. 1. The valve proving system.
MV1—Wired to terminal 9. It is located in the most
upstream position of the main gas valve train.
VPS—Valve Proving Switch: Setpoint at 1/2 of Main Valve
inlet pressure.
MV2—Wired to terminal 21. It is the main valve located
closest to the burner.
The PII—Pre-Ignition Interlock (or Proof of Closure Switch)
for terminal 20 can be installed on MV1, MV2, or as a
series connection through both valves.
Appendix B lists many wiring options for single and dual
fuel along with the Valve Proving options.
3
MV2
OUTLET
M24161A
32-00142-01