Thomas & Betts HEEDU Installation & Operation Manual

Thomas & betts indoor/power-vented duct furnaces installation and operation guide

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

Index by Page Number

Air Flow Requirements ................................. 13

Blower Connections ..................................... 14

Burner Air Adjustment .................................. 21

Burner Rack Removal .................................. 22

Burners .......................................................... 21

Bypass Duct .................................................. 13

Carryover System ......................................... 21

Check Installation and Start-Up ................... 21

CHLORINES .................................................. 5

Cleaning Pilot and Main Burners ................. 22

Cleaning the Heat Exchanger ....................... 23

Clearances ...................................................... 4

Combustion Air ............................................... 4

Combustion Air Proving Switch .................. 15

Condensate Drain, Option CS1 .................... 13

FOR YOUR SAFETY

If you smell gas:

1. Open windows.

2. Don't touch electrical switches.

3. Extinguish any open flame.

4. Immediately call your gas supplier.

WARNING: Gas-fired appliances are not

designed for use in hazardous atmospheres

containing flammable vapors or combustible

dust, in atmospheres containing chlorinated

or halogenated hydrocarbons, or in

applications with airborne silicone substances.

See Hazard Levels, Page 2.

GENERAL

nstallation should be done by a qualified agency in accordance

with the instructions in this manual and in compliance with all

codes and requirements of authorities having jurisdiction. The

instructions in this manual apply to the duct furnace models

shown on the right.

Table of Contents

nstallation and Operation ........................ 1-26 .......................... 1-20

Check Installation and Start-Up .............. 27 ............................. 21

Service/Maintenance/Troubleshooting ..... 28-33 ........................ 22-24

Coupling Two, Three, Four or Five

Furnaces ..................................................... 7

Dimensional Data ........................................... 3

Disconnect Switch ........................................ 15

Duct Connections ......................................... 12

Operating Sequence ...................................... 16

Optional Ductstat ......................................... 19

Electrical Supply and Connections .............. 15

Optional Electronic Modulation .................. 20

Fan Control (Optional) ................................. 18

Gas Piping and Pressures ............................... 8

GENERAL ...................................................... 1

HAZARD INTENSITY LEVELS .................. 2

Installation Codes ........................................... 2

Limit Switch ................................................. 17

MAINTENANCE ......................................... 22

Reference: Replacement Parts Form, RGM 735

Indoor/Power-Vented

INSTALLATION FORM RGM 421 (Version A)

APPLIES TO:

Paragraph No.

Page No.

Mounting the Furnace .................................... 6

Pilot and Ignition Systems ........................... 20

Reversing Air Flow ........................................ 6

SERVICE ...................................................... 22

Start-Up ........................................................ 21

Suspending the Furnace ................................. 6

Thermostat .................................................... 15

Troubleshooting ...................................... 23, 24

Optional Two-Stage Operation ..................... 19

Uncrating ........................................................ 4

Valve ............................................................. 19

Venter ............................................................ 23

Venting ........................................................... 9

Warranty ......................................................... 2

Wiring Diagrams ..................................... 16-17

FOR YOUR SAFETY

The use and storage of gasoline or other

flammable vapors and liquids in open

containers in the vicinity of this appliance is

hazardous.

WARNING: Improper installation, adjustment,

alteration, service, or maintenance can cause

property damage, injury or death. Read the

installation, operation, and maintenance

instructions thoroughly before installing or

servicing this equipment.

Model

Indoor, Power-Vented, Standard CFM, 80%

EEDU

Thermal Efficient

Indoor, Power-Vented, High CFM, 80%

HEEDU

Thermal Efficient

RGM Form 421, Mfg No. 150492, Page 1

Model EEDU

and HEEDU

Duct Furnaces

Installation/Operation/Service

Characteristics

Table of Contents

Need help?

Do you have a question about the HEEDU and is the answer not in the manual?

Questions and answers

Summary of Contents for Thomas & Betts HEEDU

Page 1 Model EEDU HEEDU Model EEDU and HEEDU Indoor/Power-Vented Duct Furnaces INSTALLATION FORM RGM 421 (Version A) Installation/Operation/Service Page No. Mounting the Furnace ... 6 Pilot and Ignition Systems ... 20 Reversing Air Flow ...
Page 2: Hazard Intensity Levels
1. DANGER: Failure to comply will result in severe personal injury or death and/or property damage. 2. WARNING: Failure to comply could result in severe personal injury or death and/or property damage. 3. CAUTION: Failure to comply could result in minor personal injury and/or property damage. 1.
Page 3 3. Dimensions Figure 1 (centerline of hangers) Limit Combustion Air Opening 4" (102mm) (Duct width) Minimum unit spacing Front View Dimensions (inches) Size 75, 100 34-3/8 14-1/4 35-11/16 14-5/8 125, 140 34-3/8 35-11/16 17-3/8 34-3/8 19-3/4 35-11/16 20-1/8 34-3/8 22-1/2 35-11/16 22-7/8 34-3/8 25-1/4 35-11/16 25-5/8 34-3/8 35-11/16 28-3/8...
Page 4: Clearances
4. Uncrating and Preparation This furnace was test operated and inspected at the factory prior to crating and was in operating condition. If the furnace has incurred any damage in shipment, file a claim with the transporting agency. CAUTION: Remove the panel from the bottom rear of the furnace (See Paragraph 28) and check the burner rack as- sembly.
Page 5: Chlorines
Carefully pull the bracket/ control assembly through the hole. (Do not disconnect wires.) 2. All EEDU Models (see below for high CFM HEEDU Models) - Refer to Figure 3B and follow Steps a)-d) below to reverse the direc- tion of the baffles.
Page 6: Mounting The Furnace
Do not place or add additional weight to the suspended furnace. See Hazard Levels, page 2. Form 421, Page 6 Figure 4A - Suspending a Single Furnace Figure 3C - Model HEEDU has only a top rear heat exchanger baffle. Size 75-100 125-140...
Page 7: Coupling Two, Three, Four Or Five Furnaces
8. Coupling Two, Three, Four or Five Furnaces using Optional Coupling Kits Refer to illustrations and follow the instructions below. Instructions for Coupling Furnaces (Refer to Figures 6A, 6B, 6C and 6D) 1. Attach the tie plate to the first furnace using threaded socket assem- blies.
Page 8: Gas Piping And Pressures
9. Gas Piping and Pressures WARNING: This appliance is equipped for a maximum gas supply pressure of 1/2 pound, 8 ounces, or 14 inches water column. Supply pressure higher than 1/2 pound requires installation of an additional service regulator external to the unit. PRESSURE TESTING SUPPLY PIPING Test Pressures Above 1/2 PSI: Disconnect the heater and manual valve from the gas supply line which is to be tested.
Page 9: Venting
For Natural Gas: Manifold gas pressure is regulated by the combination valve to 3.5" w.c. Inlet pressure to the valve must be a minimum of 5" w.c. or as noted on the rating plate and a maximum of 14" w.c. For Propane Gas: Manifold gas pressure is regulated by the combination valve to 10"...
Page 10 10. Venting (cont'd) Specific Venting Requirements (read all before installing) (cont'd) 1. Venter (Flue) Outlet (cont'd) Venter Outlet Attachment Requirements (cont'd): A minimum of 12" of straight pipe is required at the venter outlet (or transition fitting) before installing an elbow in the vent system. An elbow should never be attached directly to the venter.
Page 11 Instructions to connect the SINGLE WALL VENT system to a DOUBLE WALL (Type B) VENT TERMINAL: 1) Slide the single wall pipe inside the inner wall of the double-wall terminal pipe. 2) Drill a hole through both walls of the double wall pipe and the single wall pipe.
Page 12: Duct Connections
11. Duct Connections Figure 11 - Duct Connection Dimensions (inches) NOTE: If the furnace is equipped with a unit-mounted ductstat (Op- tion AG3), the sensing bulb must be removed from the mounting bracket (save the retainer clip) before the ductwork can be attached. See in- structions in Paragraph 22 for re-mounting the sensor.
Page 13: Air Flow Requirements
695 0.07 920 0.16 1150 0.20 1290 0.24 1565 0.25 1840 0.26 2070 0.27 2300 0.26 2765 0.27 3225 0.28 3685 0.28 90°F 615 0.05 815 0.12 1020 0.17 1145 0.20 1390 0.19 1635 0.20 1840 0.21 2045 0.20 2455 0.22 2565 0.23 3275 0.22 Model HEEDU (80% thermal efficient, high CFM) S ize Temperature CFM P .D.
Page 14: Blower Connections
14. Bypass Duct (cont'd) 4) Move to the left column to find out the required size of the bypass duct. Example: Bypass Duct Size is 5" Depth of the bypass duct is 18" on both inlet and outlet ends. Bypass duct must be located on side opposite controls and 2" from the heat exchanger side panel.
Page 15: Combustion Air Proving Switch
16. Combustion Air Proving Switch The combustion air proving switch is a pressure sensitive switch that monitors air pressure to ensure that proper combustion air flow is available. The switch is a single pole - normally open - device which closes when a decreasing pressure is sensed in the outlet duct of the flue gas collection box.
Page 16 Typical Wiring Diagrams -- Refer to the diagram supplied with the heater for specific controls or optional equipment. Single-Stage with Intermittent Spark Pilot System with or without Lockout W.D. 110920 Field and Replacement Wiring Notes 1. Dotted wiring supplied by others. 2.
Page 17: Limit Switch
Two-Stage with Intermittent Spark Pilot System with or without Lockout W.D. 110824 18. Limit Switch A non-adjustable high limit switch mounted at the outlet air side of the heat exchanger acts to shut off the gas supply in the event of air handler motor failure, lack of correct air flow (See Paragraph 13), or restriction due to filters and/or duct design.
Page 18: Fan Control (Optional)
19. Fan Control (Optional, Field Installed) NOTE: Required with makeup air gas control options; see Paragraphs 22 and 23. 1. Fan control provides the following: a) Delay of fan op- eration preventing circulation of cold air, and b) Fan op- eration as long as the unit is hot.
Page 19: Optional Ductstat
20. Gas Valve All furnaces are equipped with a 24-volt combination valve which includes the automatic electric on-off valve controlled by the room thermostat, the pressure regulator, the safety pilot valve, and the manual shutoff valve. The standard gas valve allows for single-stage control from a single-stage, 24-volt thermostat.
Page 20: Optional Electronic Modulation
22. Optional 2-Stage Operation (cont'd) Dial has no temperature markings. Pin on adjustment screw pointing to "B" equals approximately 70 Figure 19 - Ductstat Control in Option AG3 (Mounted in inverted position) Optional Ductstat with Electronic Remote Setpoint Module (Op- tions AG15 and AG16) -- The field-installed sensing probe is field- wired to a remote temperature selector with a temperature operating range to 130...
Page 21: Burner Air Adjustment
b) No voltage between black and brown leads on the main gas valve -- check for disconnected or shorted flame sen- sor lead or flame sensor probe. When the above conditions are normal and the main gas flow is still off, the ignition controller is probably defective. 25.
Page 22: Burner Rack Removal
SERVICE AND MAINTENANCE WARNING: If you turn off the power supply, turn off the gas. See Hazard Levels, page 2. Maintenance Requirements -- Like all quality equipment, this unit will operate with a minimum of maintenance. However, to ensure long life and satisfactory performance, the following service schedule is rec- ommended.
Page 23: Cleaning The Heat Exchanger
30. Cleaning the Heat Exchanger CAUTION: When cleaning, wearing eye protection is recommended. Outer Surfaces (circulating air side) faces of the heat exchanger, gain access by removing the inspection panels in the ductwork or remove the ductwork. Depending on whether or not the furnace is designed for high CFM (Model prefix "H"), there may be directional baffles between the heat exchanger tubes.
Page 24 32. Troubleshooting (cont'd) TROUBLE (cont'd) PROBABLE CAUS E (cont'd) Pilot lights, main 3. Ignition control does not power main valve. 3. valve will not open a) Loose wire connections. (cont'd) b) Flame sensor grounded. (Pilot lights - spark continues) c) Gas pressure incorrect. d) Cracked ceramic at sensor.

This manual is also suitable for:

Eedu

Thomas & Betts HEEDU Installation & Operation Manual

Quick Links

Need help?

Questions and answers

Related Manuals for Thomas & Betts HEEDU

Summary of Contents for Thomas & Betts HEEDU

This manual is also suitable for:

Table of Contents