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EC7830, RM7830A,EC7850A,RM7850A 7800 SERIES RELAY MODULES

15

66-1092—2

HONEYWELL

DUST
COVER

PURGE 
TIMER

WIRING 
SUBBASE

CAPTIVE 
MOUNTING 
SCREW

RUN/TEST 
SWITCH

CONFIGURATION 
JUMPERS

RELAY 
MODULE

SEQUENCE 
STATUS 
LED PANEL

RESET 
BUTTON

FLAME
AMPLIFIER

BURNER CONTROL

M15187A

Fig. 5. EC/RM7830A and EC/RM7850A Relay Modules exploded view.

4. Main Trial (MAIN TRIAL):

a.

The MAIN TRIAL time is selectable as three or
five seconds. After PILOT STAB., and with the
presence of a flame, the main fuel valve, terminal
9, is powered. If a flameout occurs, the relay
module locks out within one or two seconds,
depending on the amplifier Flame Failure
Response Time (FFRT). Thus, the second safety
time is defined as MAIN TRIAL time plus the
amplifier FFRT.

b.

During MAIN TRIAL, the Low Fire Switch Input
must be closed (EC/RM7850A). If it opens, a
safety shutdown occurs.

c.

After three or five seconds of MAIN TRIAL,
terminal 8 is de-energized for main stabilization.
Flame must remain proven during this five-
second period.

Run

1. The firing rate motor releases to modulation.
2. The relay module is now in RUN and remains in RUN

until the controller input, terminal 6, opens, indicating
that the demand is satisfied or a limit has opened.

Postpurge

The relay module (model specific) provides a two-, 15- or 30-
second POSTPURGE following the completion of the RUN
period. The blower motor output is powered to drive all
combustion products and any unburned fuel from the
combustion chamber. It also supplies combustion air to burn
fuel being purged from the fuel line downstream from the fuel
shutoff valve.

1. The main fuel valve and the intermittent pilot valve,

terminals 9 and 21, are de-energized and the firing rate
motor is commanded to the low fire position
(EC/RM7850A) to begin the POSTPURGE period.

2. The Preignition Interlock Input is ignored during

POSTPURGE.

3. After the POSTPURGE period is completed, the relay

module re-enters STANDBY.

Run/Test Switch

The Run/Test Switch is located on the top side of the relay
module, see Fig. 5. The Run/Test Switch allows the burner
sequence to be altered as follows:

1. In Purge Drive to High Fire position, the Run/Test

Switch, when placed in the TEST position, holds in
PURGE with the firing rate motor in the High Fire
position (EC/RM7850A).

Содержание RM7830A Series

Страница 1: ...ES Relay Modules Checkout and Troubleshooting Product Data SPECIFICATIONS Electrical Ratings See Tables 3A 3B 3C and 3D Voltage and Frequency RM7830A and RM7850A 120 Vac 10 15 50 60 Hz 10 EC7830A and EC7850A 220 240 Vac 10 15 50 60 Hz 10 Power Dissipation 10W maximum Maximum Total Connected Load 2000 VA Fusing Total Connected Load 20A maximum type FRN or equivalent Environmental Ratings Ambient Te...

Страница 2: ...nd if not installed and used in accordance with the instructions can cause interference with 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 interference when operated in a commercial environment Operation of this equipment in a residential area can ca...

Страница 3: ... Voltage wiring 5 For recommended wire size and type see Table 1 6 For recommended grounding practices see Table 2 Fig 1 Internal block diagram of EC RM7830A see Fig 3 for detailed wiring instructions L1 HOT N 1 5 2 CONFIGURATION JUMPERS PLUG IN PURGE TIMER CARD F G 22 PLUG IN FLAME AMPLIFIER MICROCOMPUTER RUN TEST SWITCH RESET PUSHBUTTON FLAME SIGNAL TEST JACK RELAY DRIVE CIRCUIT 1K 2K 3K 4K 5K 6...

Страница 4: ...LAY MODULE RS485 16 1K1 2K2 5K1 4K1 7K1 2K1 PV1 PV2 MV 3K1 6K1 7 ES1 ES3 ES2 3K2 SAFETY RELAY CIRCUIT 20 6 FAN AL IGN AL DDL 13 15 14 12 HIGH FIRE COMMON LOW FIRE MODULATE REMOTE RESET 8K1 8K2 9K2 9K1 INDICATES FEEDBACK SENSING OF RELAY CONTACT STATUS AND LINE VOLTAGE INPUTS RELAY CONTACT OPEN INTERNAL WIRING FIELD WIRING RELAY COIL RELAY CONTACT CLOSED DDL COMMUNICATIONS 1 2 3 5 F G 22 USER TERMI...

Страница 5: ...ER PILOT FLAME MAIN ALARM STANDBY RUN STANDBY PRE IGNITION PILOT STABIL MAIN STABIL IGNITION BURNER POSTPURGE MAIN VALVE LIMITS AND BURNER CONTROL CLOSED LOCKOUT INPUT 10 sec AIRFLOW SWITCH CHECK PILOT VALVE V2 PREIGNITION INTERLOCK OPTIONS SAFE START CHECK FLAME PROVING 3 sec 5 sec 5 sec 1 IF ON AT CALL FOR HEAT HOLD 120 sec LOCK OUT IF STILL ON 3 or 5 sec 3 or 5 sec SAFE START CHECK IF OFF AFTER...

Страница 6: ...OWER PILOT FLAME MAIN ALARM STANDBY RUN STANDBY PURGE OR WAITING PRE IGNITION PILOT STABIL MAIN STABIL IGNITION BURNER POSTPURGE MAIN VALVE LIMITS AND BURNER CONTROL CLOSED LOCKOUT INPUT 10 sec AIRFLOW SWITCH CHECK PILOT VALVE V2 PREIGNITION INTERLOCK OPTIONS SAFE START CHECK FLAME PROVING 3 sec 5 sec 5 sec 1 IF ON AT CALL FOR HEAT HOLD 120 SEC LOCK OUT IF STILL ON IF OFF AFTER 10 SEC OF FAN LOCK ...

Страница 7: ...ength of all Data ControlBus Module interconnecting wire is 4000 feet 1219 meters 10 Be sure loads do not exceed the terminal ratings Refer to the label on the relay module or to the terminal ratings in Tables 3A 3B 3C and 3D Final Wiring Check 1 Check the power supply circuit The voltage and frequency tolerance must match those of the relay module A separate power supply circuit can be required f...

Страница 8: ... at PF 0 5 20A inrush d 10 IGN Ignition 120 Vac 2A at PF 0 2 d F 11 Flame Signal 60 to 220 Vac current limited 16 Control Voltage 120 Vac 10 15 17 ES2 Preignition Interlock Input 120 Vac 1A 10A inrush for 5000 cycles Carry 5A for 250 000 cycles 20 LOS Lockout Input 120 Vac 1 mA 21 PV2 Pilot Valve 2 Intermittent 120 Vac 4A at PF 0 5 20A inrush d 22 SHTR Shutter Shutter drive for dynamic self check ...

Страница 9: ...PF 0 5 20A inrush c 6 RT Limits and Burner Control 120 Vac 1 mA 7 LD2 Airflow Switch Input 120 Vac 5A 8 PV1 Pilot Valve 1 Interrupted 120 Vac 4A at PF 0 5 20A inrush d 9 M V Main Fuel Valve 120 Vac 4A at PF 0 5 20A inrush d 10 IGN Ignition 120 Vac 2A ignition d F 11 Flame Signal 60 to 220 Vac current limited 12 HI Firing Rate High Fire 120 Vac 0 5A at PF 0 5 e 13 COM Firing Rate Common 120 Vac 0 5...

Страница 10: ...ATIC CHECKOUT After checking all wiring perform this checkout before installing the relay module on the wiring subbase These tests verify that the Q7800 Wiring Subbase is wired correctly and the external controllers limits interlocks actuators valves transformers motors and other devices are operating properly WARNING Fire or Explosion Hazard Can cause property damage severe injury or death Close ...

Страница 11: ...for correct connections tight terminal screws correct wire and proper wiring techniques 8 Replace all damaged or incorrectly sized wires 9 Replace faulty controllers limits interlocks actuators valves transformers motors and other devices as required 10 Make sure normal operation is obtained for each required test before continuing the checkout 11 After completing each test be sure to open the mas...

Страница 12: ... 1 Recycle limits 2 Burner control 6 4 16 5 4 2 7 1 Fan Burner Motor or Blower starts 2 Line voltage at terminal 7 1 Fan circuit a Manual fan switch b Fan power supply overload protection and starter c Fan 2 Running limits of Airflow Switch LD2 input NOTE Remove jumpers and re connect alarm if used 7 4 10 Ignition spark if ignition transformer is connected to terminal 10 1 Watch for spark or liste...

Страница 13: ...abled and the Airflow Switch is closed for 120 seconds with Limits and Burner Control closed d Ignition pilot valve intermittent pilot valve terminal is energized e Main valve terminal is energized f Internal system fault g Purge card is not installed or removed h Purge card is defective i Lockout Input opens during STANDBY 3 PURGE Period a Preignition Interlock opens anytime during purge b Flame ...

Страница 14: ... detection b AC line noise that can prevent a sufficient reading of the line voltage inputs c Low line voltage brownouts The INITIATE sequence also delays the burner motor starter from being energized and de energized from an intermittent AC line input or control input Standby The relay module is ready to start an operating sequence when the operating control input determines a call for heat is pr...

Страница 15: ...releases to modulation 2 The relay module is now in RUN and remains in RUN until the controller input terminal 6 opens indicating that the demand is satisfied or a limit has opened Postpurge The relay module model specific provides a two 15 or 30 second POSTPURGE following the completion of the RUN period The blower motor output is powered to drive all combustion products and any unburned fuel fro...

Страница 16: ...umpers The relay module has three site configurable jumper options see Fig 6 and Table 6 If necessary clip the site configurable jumpers with side cutters and remove the resistors from the relay module The relay module reads the settings of these configuration jumpers at startup After 200 hours of main valve operation the relay module locks the jumper settings into internal memory If these jumpers...

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