Specifications - Honeywell 7800 Series Installation Instructions Manual

RM7838B, RM7838C 7800 SERIES RELAY MODULES
The RM7838B1021 and RM7838C1012 Relay Modules
offer VPS, thus they differ in the following manner from
the RM7838B1013 and RM7838C1004:
1. Terminal 16 changes from Pilot Valve Hold Input to
Valve Proving Switch Input.
2. Terminal 17 changes from Manual Valve Open Input
to Main Valve 2 Output.
3. JR3-Deferred or Immediate Function is replaced
with Fan On for VPS.
4. Blinkum fault annunciation on safety shutdown
(power LED blinks a fault code).
5. Built-in features set up only using the S7800A1142
Keyboard Display Module.
a. Valve Proving System.
b. Programmable Postpurge.
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—Before Start input; concurrent with Prepurge.
• After—Valve proving occurs after the Run state, (Stop
Switch pushed) before the device goes to Standby.
(Concurrent with Postpurge, if selected.)
• Both—Valve proving occurs at both times Before and
After, noted above.
• Split—The main valve 1 (MV1) (high pressure) seat test
is performed at the Before time and the main valve 2
(MV2) (low pressure) seat test is performed during the
After time.
The following assumptions apply when using the
RM7838B1021 or RM7838C1012 Valve Proving testing:
MV1
VP
SW.
INLET
1
1 CAUTION: VALVE ENERGIZING TIMING IS BASED ON VALVE OPENING
TIMES OF 13 SECONDS MAXIMUM.
− FOR VALVES WITH TIMINGS GREATER THAN 13
SECONDS - A BYPASS SOLENOID (RATED AS A SAFETY
SHUTOFF VALVE) 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 17 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.
32-00211—01
MV2
OUTLET
M22660B
2
MV2—Wired to terminal 17. It is the main valve located
closest to the burner.
The Proof of Closure Switch (PII—Pre-Ignition Interlock)
for terminal 20 can be installed on MV1, MV2, or both
valves.
WARNING
Explosion Hazard.
Can cause severe injury, death or property
damage.
Leaking gas valves can result in fire or explosion.
The Valve Proving System is designed to detect
such leaks. A valve proving test time that is too
short may allow unacceptable leaks to go
undetected. Use the procedure in Appendix A to
select sufficient valve test times to detect any
unacceptable leak.

SPECIFICATIONS

Electrical Ratings (See Table 4):
Voltage and Frequency: 120 Vac (+10/-15%),
50/60 Hz (±10%).
Power Dissipation:
RM7838B,C: 10W maximum.
Maximum Total Connected Load: 2000 VA.
Fusing Total Connected Load: 15A maximum, fast blow
type SC or equivalent.
Environmental Ratings:
Ambient Temperature:
Operating: -40°F to 140°F (-40°C to 60°C).
Storage: -40°F to 150°F (-40°C to +66°C).
Humidity: 85% relative humidity continuous, noncon-
densing.
Vibration: 0.5G environment.
SIL 3 Capable:
SIL 3 Capable in a properly designed Safety Instrumented
System. See form number 65-0312-04 for Certificate
Agreement.
Approvals:
Underwriters Laboratories Inc. Listed: File No. MP268, Vol.
30. UL 37260730-2-5 / CSA C22.2 No. 60730-2-5.
Factory Mutual Approved: Report No. 1V9A0.AF.
Swiss Re (formerly Industrial Risk Insurers): Acceptable.
Federal Communications Commission: Part 15, Class B,
Emissions.
Exida: IEC 61508:2010 Parts 1-7, SIL 3 capable.
Control Safety Devices: Acceptable CSD-1
EAC Russia
IMPORTANT
A Flame Detection System is required for
operation and must be ordered separately. Select
the applicable Flame Signal Amplifier and
matching Flame Detector in form 65-0109.