Datasheet Content
Honeywell
EC7800 SERIES Q7800A 22-Terminal
Universal Wiring Subbase
Application
The Q7800A is a universal wiring subbase for the
EC7800 SERIES Relay Modules. The universal wiring
subbase provides terminais for field wiring. Knife blade
terminais located on the EC7800 SERIES Relay Module
engage the Q7800A bifurcated contacts to make electrical
connections.
The Q7800A l021 (2-sided) subbase is available for
panel mounting applications. Knockouts are provided in
the back, top and bottom for conduit connections.
Specifications
&cAUTION
WEIGHT: Disconnect power supply before beginning in
Q7800A: 196 grams. stallation to prevent electrical shock and equip
DIMENSIONS: See Fig. l. ment damage. More than one disconnect may be
ENCLOSURE: NEMA 1. involved.
APPROVALS:
To meet EN60730 approval the Q7800A subbase must
be mounted in a secured panel which meets IP40 Follow the equipment manufacturer instructions if avail
class of protection. able; otherwise, proceed as follows below.
ACCESSORIES:
Electrical Access Slot Covers, part no. 221779. MOUNTING
NOTE: For installation dimensions, see Fig. l.
l. Place the subbase in a location within the ambient
Installation temperature rating of the EC7800 SERIES Relay Module
being used. Refer to the appropriate Instructions.
2. Mount the subbase in any position except horizon
WHEN INSTALLING TlDS PRODUCT ••• tally with the bifurcated contacts pointing down. The stan
l. Read these instructions carefully. Failure to follow dard vertical position is recommended.
them could damage the product or cause a hazardous 3. Mount the Q7800A directly in the control cabinet.
condition. Be sure to allow adequate clearance for servicing, installa
2. Check the ratings given in the instructions and on the tion, access or removal of the EC7800 SERIES Relay
product to make sure the product is · suitable for your Module, Keyboard Display Module, Runffest switch, flame
application. amplifier signal voltage probes, electrical signal voltage
3. Installer must be a trained, experienced, Flame Safe probes and electrical field connections.
guard service technician.
4. Disconnect the power supply before beginning in IMPORTANT: Do not mount the wiring subbase hori
stallation to prevent electrical shock and equipment dam zontally with the bifurcated contacts pointing down.
age. More than one disconnect may be involved.
5. AU wiring must comply with applicable local electri 4. For surface mounting, use the back of the subbase as
cal codes, ordinances, and regulations. a template to mark the four screw locations. Drill the pilot
6. After installation is complete, check out product holes.
operation as provided in these instructions. 5. Insert the mounting screws using four M3.5 x 0.6
screws tightened securely.
A. G. • 9-93 • ©Honeywell Inc. /993 • Form Number 65-0/64
Fig. l-Top and front view of Q7800A1021 wiring subbase (2-sided) with dimensions in millimeters.
,- USE M3.5 x 0.6 MOUNTING SCREWS (4)
G
WN)
3
4
5
6
7
8
9
10
F
-36 -
n 1 REMOVE ONLY FOR TERMINAL TEST ACCESS. h43942
W iring 5. Recommendedgroundingpractices:
a. Each EC7800 SERIESRelay Module will have
an earthgroundterminalG that mustbe grounded
1. Refer to the equipmentmanufacturer’swiring infor- to the metal control panel with wire as short as
mation and the appropriateEC7800SERIESRelay Mod- practical. Each ground wire must be capableof
ule Specificationsfor correct subbasewiring. carrying a fault currentequalto the rating of the
2. Provide overloadprotection and disconnectmeans protectivefuse (20 amperes).
as required.Disconnectthe power supply from the main b. The earthgroundprovidesa connectionbetween
disconnectbeforebeginninginstallationto preventelectri- the subbaseand the control panel or the equip-
cal shock and equipmentdamage.More than one discon-
nectmay be involved. ment. The earthgroundwire must be capableof
3. All wiring must comply with appropriateelectrical conductingthe current to blow the 20A fuse (or
codes,ordinancesandregulations. breaker)in eventof an internal shortcircuit. The
4. For high temperatureinstallations,usewire selected EC7800SERIESRelay Module needsa low im-
for a temperaturerating abovethe notedmaximumoperat- pedancegroundconnectionto theequipmentframe
ing temperature.The flame detectorleadwiresshould be which, in turn, needsa low impedanceconnection
moistureresistant. to earth ground. For a ground path to be low
a. For the ignition leadwire,useHoneywell specifl- impedanceat RF frequencies,theconnectionmust
cation no. R1061012Ignition Cable or equiva- be made with minimum length conductorsthat
lent. (This wire is ratedat 177”C for continuous havemaximumsurfaceareas.Wide strapsorbrack-
duty, and up to 260”C for intermittentuse.It has ets arepreferredratherthan leadwires.Be careful
beentestedto 25,000volts.) to ensurethat mechanicallytightenedjoints along
b. For the flamedetectorF leadwire,useHoneywell the groundpath,suchaspipe or conduitthreadsor
specificationno. R1298020or equivalent.(This surfacesheld togetherwith fasteners,are free of
wire is ratedat 204”C for continuousduty. It is nonconductivecoatingsand havecorrosion-pro-
tested for operationup to 600 volts and break- tectedmating surfaces.
down up to 7500 volts.) 6. Recommendedwire routing for flame detector
c. For ignition installationin a contaminatingenvi- leadwires:
ronment, use Honeywell specification no. a. Do not run high voltageignition transformerwires
R1239001High TensionIgnition Cableor equiva- in the same conduit with the flame detection
lent. (This wire is resistanto severeconditionsof wiring.
oil, heat and corona, and is testedto withstand b. Do not route scannerwires in the sameconduit
high voltagesup to 25,000Vrms in a salt bath for with line voltagecircuits.
oneminutewithoutbreakdown.It is ratedat 93”C) c. Scannerwiring not utilizing armor cable should
for continuousduty, andup to 177”C for intermit- be enclosedin metal cableor conduit.
tent use. d. Follow directionsin the Flame DetectorInstruc-
tions.
2
7. Maximum wire lengths for flame detectorleadwires
are limited by the flame signal strength. Checkout
8. Make sure that loads do not exceed the terminal
ratings; refer to the labels on the EC7800 SERIES Relay After installation, perform a completecheckout of the
Module, or ratings in the EC7800 SERlES Relay Module system. Follow information supplied by the equipment
Specifications, manufacturerand instructionsfurnished with the EC7800
9. Check the power supply circuit. The voltage and SERIES Relay Module.
frequencytolerancemust match thoseof the EC7800 SE-
RlES Relay Module. Do not connectthe EC7800 SERIES SERVICE NOTE: Voltagecheckscan be accomplishedby
Relay Module to a power supply circuit that is subject to removing the Electrical AccessSlot Covers and using
line voltage variations, such as would occur with on-off the electrical accessslots on the sidesof the Q78OOA.
switching of heavy loads. A separatepower supply circuit
may be required for the EC7800 SERIES Relay Module.
Add the required disconnect meansand overload protec-
tion.
10. Check all wiring circuits according to the EC7800
I
A! CAUTION
- 1
ReplaceElectrical AccessSlot Covers after per-
SERIESRelay Module Specificationsbeforeinstalling the forming voltage checks or anytime they are re-
EC7800 SERIES Relay Module on the subbase. moved.
11. Install the EC7800 SERIES Relay Module.
12. Restorepower to the panel.
IMPORTANT: Do not run high voltage ignition trans-
former wires in the sameconduit with themme detector
wiring.
IMPORTANT: Make sure no subbasewiring is project-
ing beyond the terminal blocks. Tuck wiring in against
the back of the subbaseso it doesnot interfere with the
knife blade terminals or bifurcated contacts.
65-0164
