Honeywell RM7895A, RM7895B, RM7895C, RM7895D, EC7895A Installation Manual

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

RM7896A,C,D

7800 SERIES Relay Modules

APPLICATION

The RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D are micro- processor-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,C; RM7896A,B,C,D systems consist of a relay module, subbase, amplifier, and purge card. Options include: 2-line VFD (see document 65- 0090-6) or 4-line LCD (see document 32-00110-01) Keyboard Display Module, 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-diagnos- tics and troubleshooting. The RM7896 provides a postpurge function.

This document covers the following 7800 Series Relay Modules:

1000-Series		2000-Series
•	RM7895A1014	•	RM7895A2014
•	RM7895A1048	•	RM7895A2048
•	RM7895B1013	•	RM7895B2013
•	RM7896A1012	•	RM7896A2012
•	RM7895C1020	•	RM7895C2020
•	RM7895C1012	•	RM7895C2012
•	RM7895D1011	•	RM7895D2011
•	RM7896C1010	•	RM7896C2010
•	RM7896D1019	•	RM7896D2019
•	EC7895A1010	•	EC7895A2010
•	EC7895C1000	•	EC7895C2000

INSTALLATION INSTRUCTIONS

Edition 03.20 · 32-00156-03 · EN

This document provides installation and static checkout instructions. Other applicable publications are:

Publication	Product
No.
32-00110	S7800A2142 4-line LCD Keyboard Display
	Module Product Data
32-00166	204729A/C KDM NEMA4 Covers for 4-line
	LCD KDM
32-00235	R7824, R7847, R7848, R7849, R7861,
	R7886 Flame Amplifiers for the 7800
	SERIES 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
65-0131	221818A Extension Cable Assembly
	Product Data
65-0228	S7810B Multi-Drop Switch Module
	Product Data
65-0229	7800 SERIES Relay Modules Checkout
	and Troubleshooting Product Data.
65-0249	S7810M ModBus Module (For CE ,
	Modbus module S7810M1029 only).
65-0295	50023821-001/2 KDM NEMA4 Covers for
	classic 2-line VFD KDM
65-0089	ST7800A,C Plug-In Purge Timer

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.

SIL3

Capable

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RM7895A,B,C,D/EC7895A,C; RM7896A,C,D7800 SERIES Relay Modules

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.

SIL 3 Capable

SIL 3 Capable in a properly designed Safety Instrumented System. See form number 65-0312 for Certificate Agreement.

Approvals:

RM7895A/B/C/D AND RM7896A, C, D

Underwriters Laboratories Inc. Listed: File No. MP268. ANSI/UL 60730-2-5 / CSA C22.2 No. 60730-2-5 - Automatic Electrical Controls for Household and Similar Use, Part 2-5: Particular Requirements for Automatic Electrical Burner Control Systems.

Factory Mutual Approved: Report No. 1V9A0.AF. EAC: TC N RU д-US.Aи3O.B.04013

Federal Communications Commission: Part 15, Class B, Emissions.

EC7895A/C

EAC: TC N RU д-US.Aи3O.B.04013

Federal Communications Commission: Part 15, Class B, Emissions.

INSTALLATION

When Installing this Product…

1.Read these instructions carefully. Failure to follow 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 the application.

3.Installer must be a trained, experienced, flame safeguard service technician.

4.After installation is complete, check out the product operation as provided in these instructions.

WARNING

Fire or Explosion Hazard.

Can cause property damage, severe injury, or death.

Follow applicable safety requirements when installing a control on a burner to prevent death or severe injury.

WARNING

Electric Shock Hazard.

Can cause serious injury, death or equipment damage. Disconnect power supply before beginning installation.

IMPORTANT

1.Wiring connections for the relay modules are unique; refer to Fig. 2 and 3 or the appropriate Specifications for proper subbase wiring.

2.Wiring must comply with all applicable codes, ordinances and regulations.

3.Wiring must comply with NEC Class 1 (Line Voltage) wiring.

4.Loads connected to the RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D must not exceed those listed on the RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D label or the Specifications; see Table 1.

5.Limits and interlocks must be rated to simultaneously carry and break current to the ignition transformer, pilot valve, and main fuel valve(s).

6.All external timers must be listed or componentrecognized by authorities who have proper jurisdiction.

7.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 safeguard control and the main fuel valve(s).

8.Two flame detectors can be connected in parallel

with the exception of Infrared Flame Detectors (C7915).

9.This equipment generates, uses and can radiate radio frequency energy and, 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 may cause interference, in which case, the users, at their own expense, may be required to take whatever measures are required to correct this interference.

10.This digital apparatus does not exceed the Class B limits for radio noise for digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

Location

Humidity

Install the relay module where the relative humidity never reaches the saturation point. The relay module is designed to operate in a maximum 85% relative humidity continuous,

noncondensing, moisture environment. Condensing moisture can cause a safety shutdown.

Vibration

Do not install the relay module where it can be subjected to vibration in excess of 0.5G continuous maximum vibration.

Weather

The relay module is not designed to be weather tight. When installed outdoors, protect the relay module in an approved weather-tight enclosure.

Mounting Wiring Subbase

1.Mount the subbase in any position except horizontally with the bifurcated contacts pointing down. The standard vertical position is recommended. Any other position decreases the maximum ambient temperature rating.

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2.Select a location on a wall, burner or electrical panel. The Q7800 can be mounted directly in the control cabinet. Be sure to allow adequate clearance for servicing, installation, access or removal of the relay module, Expanded Annunciator, Keyboard Display Module, flame amplifier, flame amplifier signal voltage probes, Run/Test Switch, electrical signal voltage probes and electrical field connections.

3.For surface mounting, use the back of the subbase as a template to mark the four screw locations. Drill the pilot holes.

4.Securely mount the subbase using four no. 6 screws.

Wiring Subbase

NOTE: There are several different subbase models that can be purchased. It is important to note which subbase is compatible with the relay module when purchasing repair or replacement parts.

Series 1000 Subbase

All relay product codes that start with a 1 (example: RM7840G1014/U) can be used with existing subbase Q7800A1005/U. These relays can also be used on the Series 2000 subbase noted below.

Series 2000 Subbase

All relay product codes that start with a 2 (example: RM7840G2014/U) can be used with subbase Q7800A2005/U.

Subbase Compatibility

Any relay module in the 1000 series is fully backward compatible with any subbase already installed in the field (Q7800A1005/U, Q7800B1003/U, Q7800A2005/U, Q7800B2003/U).

Any relay module in the new 2000 series will only be able to be installed on subbase Q7800A2005/U, and will not be backward compatible with any Q7800A1005/U legacy subbases already installed in the field.

IMPORTANT

RM7895A,B,C,D/EC7895A,C; RM7896A,C,D7800 SERIES Relay Modules

Make sure to check the relay model number and check the subbase compatibly prior to ordering or attempting a new installation or field upgrade.

If you attempt to place a 2000 series relay on a non-compati- ble 1000 series subbase, you will receive an error code of 101. This indicates that you must a) change out the subbase to a Q7800A2005/U or b) choose a compatible 1000 series relay module.

WARNING

Electric Shock Hazard.

Can cause serious injury, death or equipment damage. Disconnect power supply before beginning installation.

The internal block diagram of the RM7895A,B,C,D/ EC7895A,C; RM7896A,B,C,D is shown in Fig. 1.

1.For proper subbase wiring and sequence chart, refer to Fig. 2 and 3.

2.For remote wiring of the Keyboard Display Module, refer to the Specifications for the 2-line VFD KDM (65-0090), the 4-line LCD KDM (32-00110), Data ControlBus™ Module (65-0091) or Extension Cable Assembly (65-0131).

3.Disconnect the power supply from the main disconnect before beginning installation to prevent electrical shock and equipment damage. More than one disconnect can be required.

4.All wiring must comply with all applicable electrical codes, ordinances and regulations. Wiring, where required, must comply with NEC, Class 1 (Line Voltage) wiring.

5.For recommended wire size and type, see Table 1.

6.For recommended grounding practices, see Table 2.

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RM7895A,B,C,D/EC7895A,C; RM7896A,C,D7800 SERIES Relay Modules

Fig. 1. RM7823 and EC7823 wiring for SIL 3 applications

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RM7895A,B,C,D/EC7895A,C; RM7896A,C,D7800 SERIES Relay Modules

FOR RM7895A1028/2028 (ONLY), IGNITION TERMINAL 10

IS DE-ENERGIZED WHEN FLAME IS PROVEN.

FOR EC7895, A 220 TO 240 VAC TO 120 VAC,

10 VA MINIMUM STEPDOWN TRANSFORMER (NOT PROVIDED) MUST BE USED TO DRIVE THE SHUTTER. THIS DOES NOT APPLY TO UV FLAME SENSOR MODELS C7061A1020, C7061A1079 AND C7061F1003 (COMBINED WITH R7861-SERIES FLAME AMPLIFIERS),

WHICH HAVE INTERNAL SELECTABLE TERMINAL BLOCK TO CONNECT 230V SHUTTER OUTPUT DIRECTLY.

Fig. 2. Wiring subbase and sequence chart for RM7895A,B/EC7895A; RM7896A,B.

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