Install Instructions

ManualsBrandsHoneywell ManualsHeating SuppliesOn-Off Primary Control with PrePurge - Interrupted Pilot

Table Of Contents

INSTALLATION INSTRUCTIONS

66-1090-06

RM7895A,B,C,D/EC7895A,C;

RM7896A,B,C,D

7800 SERIES Relay Modules

APPLICATION

The RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D are

microprocessor-based integrated burner controls for

automatically fired gas, oil, or combination fuel single burner

applications. They are intended to replace the R4795 and

R7795 Primary Controls. The RM7895A,B,C,D/EC7895A;

RM7896A,B,C,D systems consist of a relay module, subbase,

amplifier, and purge card. Options include keyboard display

module (KDM), Personal Computer Interface, Data

ControlBus™ Module, remote display mounting, expanded

annunciator and Combustion System Manager® Software.

Functions provided by the RM7895A,B,C,D/EC7895A,C;

RM7896A,B,C,D include automatic burner sequencing,

flame supervision, system status indication, system or

self-diagnostics and troubleshooting. The RM7896 provides

a postpurge function.

This document provides installation and static checkout

instructions. Other applicable publications are:

SPECIFICATIONS

Electrical Ratings (See Table 3):

Voltage and Frequency:

RM7895/RM7896: 120 Vac (+10/-15%), 50/60 Hz (± 10%).

EC7895A,C: 220/240 Vac (+10%/-15%), 50/60 Hz (±10%)

Power Dissipation: 10W maximum.

Maximum Total Connected Load: 2000 VA.

Fusing Total Connected Load: 15A 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, noncondensing.

Vibration: 0.5G environment.

Approvals:

RM7895/RM7896:

Underwriters Laboratories Inc. Listed: File No. MP268,

Guide No. MCCZ.

Canadian Standards Association Certified: LR9S329-3.

Factory Mutual Approved: Report No. J.I.1V9A0.AF.

IRI Acceptable.

Federal Communications Commission: Part 15, Class B,

Emissions.

EC7895A,C:

Factory Mutual Approved.

Publication

No. Product

63-2278 Q7700 Network Interface Unit Product Data

65-0084 Q7800A,B 22-Terminal Wiring Subbase

Product Data

65-0090 S7800A Keyboard Display Module Product

Data

65-0091 S7810A Data ControlBus Module™ Product

Data

65-0095 S7820 Remote Reset Module Product Data

65-0097 221729C Dust Cover Packing Instructions

65-0101 S7830 Expanded Annunciator Product Data

65-0102 ZM7850A Combustion System Manager™

Operating Instructions

65-0109 R7824, R7847, R7848, R7849, R7851,

R7861, R7886 Flame Amplifiers for the

7800 Series Product Data

65-0131 221818A Extension Cable Assembly

Product Data

65-0229 7800 SERIES Relay Modules Checkout and

Troubleshooting Product Data.

65-0092 QS7800A ControlBus™ Module, Standard

65-0227 QS7800B ControlBus™ Module, Multidrop

Publication

No. Product

Summary of content (12 pages)

PAGE 1
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES Relay Modules INSTALLATION INSTRUCTIONS APPLICATION Publication No. The RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D are microprocessor-based integrated burner controls for automatically fired gas, oil, or combination fuel single burner applications. They are intended to replace the R4795 and R7795 Primary Controls. The RM7895A,B,C,D/EC7895A; RM7896A,B,C,D systems consist of a relay module, subbase, amplifier, and purge card.
PAGE 2
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES INSTALLATION Location When Installing this Product… Humidity 1. 2. 3. 4. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. Check the ratings given in the instructions and marked on the product to make sure the product is suitable for the application. Installer must be a trained, experienced, flame safeguard service technician.
PAGE 3
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES Wiring Subbase 1. 2. WARNING Electrical Shock Hazard. Can cause serious injury, death or equipment damage. Disconnect the power supply before beginning installation. 3. 4. The internal block diagram of the RM7895A,B,C,D/ EC7895A,C;RM7896A,B,C,D is shown in Fig. 1. 5. 6. For proper subbase wiring and sequence chart, refer to Fig. 2 and 3.
PAGE 4
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES Q7800 FOR DIRECT SPARK IGNITION (OIL OR GAS) G 12 L2 13 10 IGNITION TRANSFORMER LINE VOLTAGE ALARM 3 14 8 MAIN VALVE BURNER MOTOR (BLOWER) 4 15 5 (L1) 16 BURNER CONTROLLER/LIMITS 6 17 LOCKOUT INTERLOCK (INCLUDING AIRFLOW SWITCH) 7 18 INTERMITTENT PILOT/IGNITION 8 19 MAIN FUEL VALVE(S) 9 20 10 21 F 22 2 IGNITION FLAME DETECTOR 4 MASTER SWITCH L1 (HOT) 3 L2 00 LED DISPLAY INITIATE POWER STANDBY POWER 0
PAGE 5
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES Q7800 FOR DIRECT SPARK IGNITION (OIL OR GAS) G 12 L2 13 10 LINE VOLTAGE ALARM 3 14 8 BURNER MOTOR (BLOWER) 4 15 5 (L1) IGNITION TRANSFORMER L2 9 MAIN VALVE 16 BURNER CONTROLLER/LIMITS 6 17 LOCKOUT INTERLOCK (INCLUDING AIRFLOW SWITCH). 7 18 10 SEC.
PAGE 6
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES Table 1. Recommended Wire Sizes and Part Numbers. Application Recommended Wire Size Recommended Part Numbers Line voltage terminals. 14, 16 or 18 AWG copper conductor, 600 volt insulation, TTW60C, THW75C, THHN90C. moisture-resistant wire. Keyboard Display Module 22 AWG two-wire twisted pair with ground, or five-wire. Belden 8723 shielded cable or equivalent.
PAGE 7
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES Table 3. Terminal Ratings. Ratings Terminal Number G Description RM7895/RM7896 Flame Sensor Ground Earth G Earth L2(N) Line Voltage Common Grounda EC7895 — — — — — — 220-240 Vac, 1A pilot duty. 3 Alarm 120 Vac, 1A pilot duty. 4 Burner Motor 120 Vac, 9.8A AFL, 58.8 ALR (inrush). 220-240 Vac, 4A at PF = 0.5, 20A inrush. 5 Line Voltage Supply (L1) 120 Vac (+10/-15%), 50 or 60 Hz (±10%).
PAGE 8
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES STATIC CHECKOUT Equipment Recommended 1. After checking all wiring, perform this checkout before installing the EC7895A,C/RM7895A,B,C,D/RM7896A,B,C,D on the subbase. These tests verify the Q7800 Wiring Subbase is wired correctly, and the external controllers, limits, interlocks, actuators, valves, transformers, motors and other devices are operating properly. 2. General Instructions 1. WARNING 2. 3. Fire or Explosion Hazard.
PAGE 9
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES Table 6. Static Checkout (Continued). Test Relay Module Test Number Model Jumpers Voltmeter 5 All 5-8 — Normal Operation 1. Ignition spark (if ignition transformer is connected to terminal 8). 2. Automatic pilot valve opens (if connected to terminal 8). If Operation is Abnormal, Check Items Listed Below 1. Watch for spark or listen for buzz. 2. Listen for click or feel head of valve for activation. a. Actuator if used. b. Pilot valve.
PAGE 10
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES WIRING SUBBASE RUN/TEST (C,D ONLY) SWITCH HONEYWELL RELAY MODULE CONFIGURATION JUMPERS PURGE TIMER SEQUENCE STATUS LED PANEL POWER RESET BUTTON PILOT FLAME MAIN ALARM CAPTIVE MOUNTING SCREW RESET DUST COVER BURNER CONTRO L FLAME AMPLIFIER M15122 Fig. 4. RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D Relay Module, exploded view. 2. 3. STANDBY PERIOD a.
PAGE 11
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES 5. 6. MAIN FLAME ESTABLISHING PERIOD (MFEP) (RM7895C, RM7896C,D; EC7895C) a. Airflow lockout feature is enabled and the airflow switch opens. b. Ignition terminal is energized. c. Ignition/pilot valve terminal is not energized. d. Main valve terminal is not energized. e. Delayed main valve terminal is energized. f. No flame signal at end of Flame Failure Response Time. g. Internal system fault occurred. h. Purge card is removed. i.
PAGE 12
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES Run 1. 2. The EC7895C, RM7895C,D, RM7896C,D has a delayed main valve that is energized once the RUN period is entered. 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.