Honeywell R8330A-H, R8330A-J, R8330A-K Installation Manual

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R8330 ELECTRIC FURNACE SEQUENCERS SWITCH A FAN AND ELECTRIC HEATING ELEMENTS ON AND OFF IN SEQUENCE.

q Single unit control of heating elements and

fan reduces control space .requirements and wiring in furnace.

q Elements sequence on within 2 minutes and

off within 4 minutes.

q Meet latest EEI-NEMA standards.

o Multipoise mounting of control.

q All models are same size.

q Designed for easy mounting with tab and

single screw.

q Devices are ambient compensated for minus

20 to plus 162 F [ minus29toplus71C].

q Models available with low VA pilot duty

rating for remote fan operation.

EI Isolated fan or combination rated models

available.

q Quick-connect terminals for easy wiring.

q Designed for quiet, reliable operation.

q .Thermostat current draw is constant (0.4

amp).

q Model line offers complete range of control

choice to meet all application requirements.

L.H.

REV. 7-75 l.086)

Tradeline models are selected and packaged for ease of handling, ease of stocking, and maximum replacement

TRADELINE MODELS

value. Tradeline model specifications are the same as those of standard models except as noted below. MODEL: R8330D1039 Electric Furnace Sequencer.

This single model replaces all 10 of the other

models in our line.

ADDITIONAL FEATURES:

0 Includes special Tradeline accessories.

MODELS:

-Mounting screws.

STANDARD MODELS

R8330A Electric Furnace Sequencer-3-switch model

sequences 2 elements and fan on and off. Fan interlock switches fan on with first element and off with last element.

R8330B Electric Furnace Sequencer-4-switch model

sequences 3 elements and fan on and off. Fan interlock switches fan on with first element

and off with last element.

R8330C Electric Furnace Sequencer-same as R8330A

with auxiliary switch to energize a second R8330.

R8330D Electric Furnace Sequencer-same as R8330B

with auxiliary switch to energize a second R8330.

R8330E Electric Furnace Sequencer-2-switch com-

bination rated model sequences 2 elements and fan

on and off. Fan and first element controlled by

first load switch (terminals 3-4).

R8330F Electric Furnace Sequencer-J-switch com-

bination rated model sequences 3 elements and

TABLE I-MODEL SUMMARY

-Mounting nuts and bolts.

-Double male quick-connect adapters.

-New replacement quick-connects.

-Jumper leadwires.

0 Tradeline nack with cross reference label and

special instruction sheet.

fan on and off. Fan and first element are controlled by the first load switch (terminals 34).

R8330G Electric Furnace Sequencer-same as R8330E

with auxiliary switch to energize a second R8330.

R8330H Electric Furnace Sequencer-same as R8330F

with auxiliary switch to energize a second R8330.

R8330J Electric Furnace Sequencer-2-switch model

sequences one element and fan on and off. Fan interlock switches fan and element on and off simultaneously.

R8330K Electric Furnace Sequencer- 1 -switch com-

bination rated model sequences 1 element and

fan on and off. Fan and first element controlled by first load switch (terminals 34). Standard model is used in single element furnaces. A model with special on and off timing is available for use in 4element, multiple sequencer, combination rated applications.

WHEN ORDERING REFER TO THE PRICE SHEETS FOR COMPLETE ORDERING SPECIFICATION

NUMBER, OR.. .

SPECIFY- ORDER FROM-

1. MODEL NUMBER.

2. ACCESSORY CONTROLS, IF DESIRED.

1. YOUR USUAL SOURCE, OR

2. HONEYWELL 1885 DOUGLAS DRIVE NORTH

MINNEAPOLIS, MINNESOTA 55422 (IN CANADA-HONEYWELL CONTROLS LIMITED

740 ELLESMERE ROAD

SCARBOROUGH, ONTARIO) INTERNATIONAL SALES AND SERVICE OFFICES IN ALL PRINCIPAL CITIES OF THE WORLD.

Page

ELECTRICAL RATINGS:

Load Contact Rating (all models)-

CONTACT RATINGS

VOLTS AC

208 25.0 5.2 20.8 4.3 5.5 15.0 240 25.0 6.0 20.8 5.0 5.5 15.0 277 21.7 6.0 18.0 5.0 3.6 8.6

(3-4, 5-6, AND 7-8)

RESISTIVE

AMP

KW AMP

Fan contacts (Fl, F2)-R8330A,B,C,D, and J7

COMBINED RESISTIVE AND INDUCTIVE

CONTACT RATINGS (3-4 ONLY) (UL)

RESISTIVE

INDUCTIVE

AFL ALR

THERMOSTAT HEAT ANTICIPATOR SETTING: 0.4

amp. If combination hookups are used (see wiring diagrams), set heat anticipator to the values given in Table II.

\-J

ai/3 hp.

b314 hp.

Pilot Duty Rating-62.5 VA at 24V ac; special models

available with pilot duty rating of 3.5-62.5 VA on

fan contacts at 24V ac.

AUXILIARY SWITCH (R8330C,D,G, and H only): 3.6

‘-

amp full load; 21.6 amp locked rotor at 240V ac;

5 amp resistive at 24, 120, 208, and 240V ac; 35

VA pilot duty at 24V ac. CONTROL VOLTAGE: 24V ac; 0.40 amp. MINIMUM AMBIENT TEMPERATURE: Minus 20 F

[minus 29 C]. MAXIMUM AMBIENT TEMPERATURE: Plus 162 F

[plus 71 C] (Underwriters Laboratories Inc.).

DIMENSIONS: See Fig. 1. TIMING: 10 seconds minimum between stages at 106

percent rated voltage and 120 F [49 C] ambient. All stages of single control sequence on within two minutes and off within four minutes at nominal voltage and

ambient temperature. Timings comply with new EEI-NEMA Standards for Local Control for Use on Central Electric Heating Systems.

SYSTEM TRANSFORMER REQUIREMENTS: 24V ac

secondary. Current remains constant during thermostat ON cycle. See thermostat heat anticipator settings for circuit current draw. One sequencer requires 20 VA transformer. A 40 VA transformer or larger must be used when two or more R8330’s

are used.

MOUNTING MEANS: Mounting tab inserted into 3/16

inch hole and secured with a single No. 10 screw (not included): Mount on steel plate up to l/16 inch thick.

WIRING CONNECTIONS:

Fan and Elements-l/4 inch male quick-connects. Heater-l/4 inch male quick-connects. Auxiliary Switch (R8330C,D,G, and H only)-l/4

inch male quick-connects.

UNDERWRITERS LABORATORIES INC. COMPO-

NENT RECOGNIZED: File No. E55260, Guide No. XAPXZ.

CANADIAN STANDARDS ASSOCIATION CERTI-

FIED: File No. LR1620.

FIG. l-R8330 DIMENSIONS, ALL MODELS IN IN-

CHES [MILLIMETERS IN BRACKETS].

ACCESSORY CONTROLS:

1. AT20, AT40, and AT72 Transformers-25V ac open secondary. Used to supply power to systems using R8330 Sequencers; AT40 or larger must be used when two or more R8330’s are used. Refer to wiring hookups and transformer specification sheets for additional information.

2. T87F Thermostat for heating systems; use with Q539 Subbase for heating-cooling systems. T872 Thermostat with 4672 Subbase for l- or 2-stage

heating and/or cooling applications. Refer to applicable specification sheets for additional information.

Page

4 --

5 1 5 -5 -6 - 1 6 -6 --

TABLE II

FOR WIRING

7 1

7 -

aUse R8330K-special timing specifications.

bFan interlock relays required for single-stage thermostat operation only. cNOTE: Two sequencer heaters wired in parallel. dTwo-speed fan changeover relay switches fan from low speed to high speed when subbase switch is changed from heat to cool.

. _

_ 1 ll- __I- - -

- - -I- -I- 2 -

I -r--

_I spdt Ial dpst spdtb

0.4 0.4 0.4 1

0.4 0.4 0.8 1

LOCATION AND MOUNTING

The design of the furnace will determine the control

location. Make sure that the area selected is within

1. Installer must be a trained, experienced serviceman.

2. Disconnect power supply before connecting wiring to prevent electrical shock and equipment damage.

3. Conduct a thorough checkout after the installation is complete.

the control’s ambient temperature range of minus 20 to

plus 150 F [minus 29 to plus 71 C] .

Mount the control on steel plate up to .1/16 inch thick. The R8330 may be mounted in any position. Note the locations of the mounting tab and screw slot

(see Fig. 1). Drill a 3/16 inch hole for the mounting tab and a hole for a No. 10 self-tapping sheetmetal screw. Slip tab into place and fasten R8330 with screw

in mounting slot.

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