Reznor UEAS Manuel d'instructions

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Form I-UEAS (Version A)

Obsoletes Form I-UEAS

Installation/Operation/Maintenance

Applies to: Model UEAS,

High-Efciency, Separated-

Combustion, Low-Static

Unit Heater

This booklet includes installation, operation, maintenance, and service information. Before beginning

any procedure, carefully review all information, paying particular attention to the warnings. All installation

procedures must be in compliance with all codes and requirements of authorities having jurisdiction.

Keep this booklet for future reference.

CQS

FOR YOUR SAFETY

What to do if you smell gas:

Do not try to light any appliance.

Do not touch any electrical switch; do not use any phone in your building.

Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s

instructions.

If you cannot reach your gas supplier, call your re department.

FOR YOUR SAFETY

Do not store or use gasoline or other ammable vapors and liquids in the vicinity

of this or any other appliance.

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.

•

Form I-UEAS, P/N 221232 R6, Page 1

1.1 Hazard Labels and Notices

There are warning labels on the unit and throughout this manual. For your

safety, read the denitions below and comply with all boxes labeled CAU-

TION, WARNING, and DANGER during installation, operation, mainte-

nance and service of this heater.

Denitions of Hazard Intensity Levels in this Manual

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.

WARNING

Gas-red appliances are not designed for use in

hazardous atmospheres containing ammable vapors or

combustible dust, in atmospheres containing chlorinated

or halogenated hydrocarbons, or in applications with

airborne silicone substances. See Hazard Levels above.

1. General

Table of Contents

1. General........................2 - 4

1.1 Hazard Labels and Notices . . . . . . . . . . . .2

1.2 General Information . . . . . . . . . . . . . . . . . .3

1.3Warranty...........................3

2. Unit Heater Location . . . . . . . . . . . .4 - 6

1.4 Installation Codes. . . . . . . . . . . . . . . . . . . .4

3. Receiving, Uncrating, and Preparing

for Installation ..................6

4. Clearances and Dimensions . . . . . .6 - 7

4.1Clearances.........................6

4.2Dimensions ........................7

5. High Altitude Operation . . . . . . . . . . . . 8

6. Hanging the Heater ................8

7. Mechanical....................9 - 29

7.1 Gas Piping and Pressure . . . . . . . . . . . . . .9

7.2 Venting and Combustion Air . . . . . . . . . .13

7.3 Condensate Drain System . . . . . . . . . . . .28

8. Electrical and Wiring. . . . . . . . . . .30 - 31

8.1 Electrical Supply. . . . . . . . . . . . . . . . . . . .30

8.2 24V Control Wiring Connections . . . . . . .30

8.3 Typical Wiring Diagram . . . . . . . . . . . . . .31

9. Controls.....................32 - 34

9.1Thermostat........................32

9.2GasValve.........................32

9.3SafetyControls.....................32

10. Ignition System . . . . . . . . . . . . . .34 - 37

11. Operation...................37 - 39

11.1 Check the Installation Prior to Startup . .37

11.2 Heater Startup . . . . . . . . . . . . . . . . . . . .38

11.3 Check Installation After Startup . . . . . . .39

12. Maintenance and Service . . . . . .40 - 49

12.1 Maintenance Schedule. . . . . . . . . . . . . .40

12.2 Maintenance Procedures . . . . . . . . . . . .40

12.3 Troubleshooting . . . . . . . . . . . . . . . . . . .47

APPENDIX ........................50

TechnicalData........................50

Operating Principle. . . . . . . . . . . . . . . . . . . . .50

INDEX............................51

Form I-UEAS, Page 2

1.2 General

Information

WARNING

Should overheating occur, or the gas supply fail to shut

off, shut off the manual gas valve to the appliance before

shutting off the electrical supply.

WARNING

Do not use this appliance if any part has been under

water. Immediately call a qualied service technician to

inspect the appliance and replace any gas control that

has been under water.

WARNING

Installation should be done by a qualied agency in

accordance with these instructions. The qualied

service agency installing this high efciency separated-

combustion system is responsible for the installation.

1.3 Warranty

Refer to the limited warranty information on the Warranty Form shipped

with the heater.

Warranty is void if ...

a. Wiring is not in accordance with the diagram furnished with the

heater.

b. The unit is installed without proper clearance to combustible

materials.

c. A fan model is connected to a duct system or if the air delivery sys-

tem is modied.

Model UEAS high-efciency unit heaters are design certied by ITS for use

in industrial and commercial installations in the United States and Canada.

Instructions in this manual apply only to Model UEAS heaters.

Model UEAS heaters are available for use with either natural or propane

gas. The type of gas, the input rate, and the electrical supply requirement

are shown on the heater rating plate. Check the rating plate to determine

if the heater is appropriate for the intended installation. NOTE: All Model

UEAS heaters are factory equipped for use with natural gas and include a

conversion kit for eld conversion for use with propane.

Model UEAS heaters have a titanium stabilized primary heat exchanger

with a MacroChanne® secondary heat exchanger (patent pending).

CAUTION

Model UEAS unit heaters should not be used in an

application where the heated space temperature is below

50°F. The combination of low space and combustion air

temperatures may result in condensate freezing in the

secondary heat exchanger and/or condensate drain.

Form I-UEAS, P/N 221232 R6, Page 3

Special Installations

(Aircraft Hangars/

Repair Garages/Parking

Garages)

California Warning Label

Massachusetts

Requirement

1. General (cont’d)

FIGURE 1 - Throw for

Fan Model UEAS

Heater Throw

2. Unit Heater

Location























NOTE: Throws listed are

with standard adjustable

horizontal louvers at the

angles listed (angle is rela-

tive to the top of the heater).

Throw pattern changes with

the addition of optional verti-

cal louvers and/or downturn

nozzles.

1.4 Installation Codes

These units must be installed in accordance with local building codes. In

the absence of local codes, in the United States, the unit must be installed

in accordance with the National Fuel Gas Code, ANSI Z223.1 NFPA 54.

A Canadian installation must be in accordance with the CSA B149 Instal-

lation Codes. These codes are available from CSA Information Services,

1-800-463-6727. Local authorities having jurisdiction should be consulted

before installation is made to verify local codes and installation procedure

requirements.

Installations in aircraft hangars should be in accordance with ANSI/NFPA

No. 409 (latest edition), Standard for Aircraft Hangars; in public garages in

accordance with ANSI/NFPA No. 88A (latest edition), Standard for Park-

ing Structures; and for repair garages in accordance with ANSI/NFPA No.

88B (latest edition), Standard for Repair Garages. In Canada, installations

in aircraft hangars should be in accordance with the requirements of the

enforcing authorities, and in public garages in accordance with CSA B149

codes.

If the heater is being installed in the state of California, the installer MUST

attach a warning label on the outside of the access door. Find the California

Warning label, P/N 196977, in the plastic bag with this installation manual.

Select a location on the heater access panel. Be sure the surface is clean

and dry and adhere the label.

If the heater is being installed in the Commonwealth of Massachusetts, this

unit must be installed by a licensed plumber or licensed gas tter.

Use the throw data and location information in this section; clearances and

dimensions in Paragraph 4; weights and hanging instructions in Paragraph

6; and piping, venting, and condensate drain requirements in Paragraph

7, to determine where to suspend the heater. Due to possible condensate

freezing in the secondary heat exchanger and/or condensate drain, this

heater should not be used in an application where the space temperature

of the location is below 50°F.

Form I-UEAS, Page 4

Locate the heater so that it is a minimum of ve feet (1.5M) above the oor

and in compliance with the clearances in Paragraph 4.1.

WARNING: Internal heater surfaces that are accessible

from outside the heater will cause burns if touched. Sus-

pend the heater a minimum of 5 feet (1.5M) above the

oor.

For best results, the heater should be placed with certain rules in mind. In

general, a unit should be located from 8 to 12 feet (2.4-3.7M) above the

oor. Units should always be arranged to blow toward or along exposed

wall surfaces, if possible. Where two or more units are installed in the same

room, a general scheme of air circulation should be maintained for best

results.

Suspended heaters are most effective when located as close to the work-

ing zone as possible, and this fact should be kept in mind when determin-

ing the mounting heights to be used. However, care should be exercised to

avoid directing the discharged air directly on the room occupants.

Partitions, columns, counters, or other obstructions should be taken into

consideration when locating the unit heater so that a minimum quantity of

airow will be deected by such obstacles.

When units are located in the center of the space to be heated, the air

should be discharged toward the exposed walls. In large areas, units should

be located to discharge air along exposed walls with extra units provided to

discharge air in toward the center of the area.

At those points where inltration of cold air is excessive, such as at entrance

doors and shipping doors, it is desirable to locate the unit so that it will dis-

charge directly toward the source of cold air from a distance of 15 to 20

feet (4.6-6.1M).

CAUTION: Do not locate the heater where it may be ex-

posed to water spray, rain, or dripping water.

Location

Recommendations

Dimensions X, Y, and Z (feet) Model UEAS with Standard Horizontal Louvers at Mounting Heights of 5 - 18 ft

130 180 260 310

XY Z Louver

Angle* XY Z Louver

Angle*

8 ft 13 24 73 -26° 16 30 93 -20° 15 28 94 -24° 17 31 105 -20°

10 ft 14 24 69 -32° 17 31 91 -25° 16 28 89 -29° 18 32 103 -25°

12 ft 14 24 64 -39° 18 31 88 -30° 17 28 85 -34° 19 32 98 -30°

14 ft 14 22 59 -45° 19 30 84 -34° 17 27 80 -40° 20 32 95 -34°

16 ft 13 20 53 -51° 19 29 79 -39° 17 25 74 -45° 21 31 90 -38°

18 ft 11 17 44 -58° 19 28 74 -44° 16 24 66 -51° 20 30 85 -43°

Dimensions X, Y, and Z (meters) Model UEAS with Standard Horizontal Louvers at Mounting Heights of 1.5 - 5.5M

130 180 260 310

XY Z Louver

Angle* XY Z Louver

Angle*

2.4 M 4 7 22 -26° 5 9 28 -20° 5 9 29 -24° 5 9 32 -20°

3.0 M 4 7 21 -32° 5 9 28 -25° 5 9 27 -29° 6 10 31 -25°

3.7 M 4 7 20 -39° 6 9 27 -30° 5 9 26 -34° 6 10 30 -30°

4.3 M 4 7 18 -45° 6 9 26 -34° 5 8 24 -40° 6 10 29 -34°

4.9 M 4 6 16 -51° 6 9 24 -39° 5 8 23 -45° 6 9 27 -38°

5.5 M 3 5 13 -58° 6 9 23 -44° 5 7 20 -51° 6 9 26 -43°

Form I-UEAS, P/N 221232 R6, Page 5

3. Receiving,

Uncrating, and

Preparing for

Installation

4. Clearances and

Dimensions

The presence of chlorine vapors in the combustion air of gas-red heating

equipment presents a potential corrosion hazard. Chlorine found usually in

the form of freon or degreaser vapors, when exposed to ame will precipi-

tate from the compound, and go into solution with any condensation that is

present in the heat exchanger or associated parts. The result is hydrochlo-

ric acid which readily attacks all metals including 300 grade stainless steel.

Care should be taken to separate these vapors from the combustion pro-

cess. This may be done by wise location of the unit vent and combustion air

terminals with regard to exhausters or prevailing wind directions. Chlorine

is heavier than air. Keep these facts in mind when determining installation

location of the heater in relation to building exhaust systems.

2. Unit Heater

Location (cont’d)

Location Recommendations (cont’d)

Hazards of Chlorine

- applies to location of

Model UEAS heater with

regard to combustion air

inlet

This unit was test operated and inspected at the factory prior to crating

and was in operating condition. If the heater has incurred any damage in

shipment, document the damage with the transporting agency and contact

an authorized Reznor Distributor. If you are an authorized Distributor, fol-

low the FOB freight policy procedures as published by Thomas & Betts for

Reznor products.

Check the rating plate for the gas specications and electrical character-

istics of the heater to be sure that they are compatible with the gas and

electric supplies at the installation site. A conversion kit is included with the

heater for converting for use with propane; see instructions in Paragraph

7.1.4.

Read this booklet and become familiar with the installation requirements of

your particular heater. If you do not have knowledge of local requirements,

check with the local gas company or any other local agencies who might

have requirements concerning this installation.

Before beginning, make preparations for necessary supplies, tools, and

manpower. Be sure that the vent/combustion air kit (either vertical Option

CC2 or horizontal Option CC6) is at the job site.

If the installation includes optional vertical louvers, downturn nozzle, and/or

a hanger kit, install these options before the heater is suspended. Instruc-

tions are in this form or in the option package; option packages are shipped

separately.

Other shipped-separate items could include a thermostat bracket kit, a

thermostat, and/or a thermostat guard. Be sure all options ordered are at

the installation site.

4.1 Clearances

Units must be installed so that the clearances in the table are provided

for combustion air space, inspection and service, and for proper spacing

from combustible construction. Clearance to combustibles is dened as the

minimum distance from the heater to a surface or object that is necessary

to ensure that a surface temperature of 90°F above the surrounding ambi-

ent temperature is not exceeded.

Clearances

Model UEAS

130, 180, 260,

310

Top Flue Connector Access Panel Non-Access Side Bottom* Rear

inches mm inches mm inches mm inches mm inches mm inches mm

4 102 6 152 18 457 2 51 1 25 18 457

*Suspend the heater so that the bottom is a minimum of 5 feet (1.5M) above the oor.

IMPORTANT: Shipping

brackets are attached with

cabinet screws. When

removing shipping brack-

ets, re-insert ALL screws

into the cabinet.

Form I-UEAS, Page 6

4.2 Dimensions

FIGURE 2 - Model UEAS Dimensions

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



































 







  

FIGURE 3 - Dimension

“T” With Optional

Downturn Nozzle

Top View Rear View

Front View Right Side View

25”

(635mm)

5-5/8” (143mm)

1-9/16” (40mm)

Condensate Drain

4” Vent Connection

Line Voltage Entrance

(connects in sealed electrical box)

6” Combustion

Air Connection

Disconnect Switch

Thermostat

Connection

8-1/4” (210mm)

3-1/4” (83mm)

1-1/4” (32mm)

Four

Suspension

Points

(3/8-16 Female

Thread)

23” (584)

LED Viewport

External Gas Connection

Size A B C E F G H J K M N PR S

Dimensions - inches (±1/8 inch)

130, 160 20-1/8 39-3/16 16-1/16 11-15/16 2-3/8 25-11/16 50-1/2 42 13-7/16 8-5/16 4-5/16 5-1/16 6-5/16 1-3/4

260, 310 34-1/8 40-15/16 30-1/16 13-15/16 1-3/8 27-11/16 53-5/16 44 14-7/32 9-3/32 5-1/16 18-15/16 7-3/4 1-3/8

Dimensions - mm (±3 mm)

130, 160 511 995 408 303 60 652 1283 1067 341 211 110 129 160 44

260, 310 867 1039 764 354 35 703 1354 1118 361 231 129 481 197 35

"T" for UEAS

Size

with Option CD2 with Option CD3 with Option CD4

inches mm inches mm inches mm

130, 180 11-1/2 292 19-7/8 505 14-1/2 368

260, 310 18-1/2 470 32 813 21-1/2 546

Form I-UEAS, P/N 221232 R6, Page 7

WARNINGS: Check the supporting structure to be used to

verify that it has sufcient load carrying capacity to sup-

port the weight of the unit. Suspend the heater only from

the threaded nut retainers or with a manufacturer provid-

ed kit. Do NOT suspend from the heater cabinet.

6. Hanging the

Heater

When the heater is lifted for suspension, support the bottom of the heater

with plywood or other appropriately placed material. If the bottom is not

supported, damage could occur. Before hanging, verify that any screws

used for holding shipping brackets were re-installed in the cabinet.

The heater has four-point suspension. Suspension point dimensions are

shown in FIGURE 2, page 7. A 3/8”-16 threaded nut retainer is located at

each suspension point (FIGURE 4A).

If ordered with swivel connectors, Option CK10, for 1” pipe attach the swiv-

els at the threaded nut retainers. Suspend with 1” pipes (FIGURE 4B).

Before suspending the heater, check the supporting structure to be used

to verify that it has sufcient load-carrying capacity to support the weight

of the unit.

Model UEAS - Weight

Size 130 180 260 310

lbs 230 245 360 395

kg 104 111 163 179

If the heater is being installed at an elevation above 2000 ft (610M), the

input rate will have to be derated. This is done by adjusting the valve outlet

pressure. Adjusting the valve outlet pressure is done after the heater is in

operation; follow the instructions in Paragraph 7.1.3. Capacities and inputs

for derated units are also listed in Paragraph 7.1.3.

5. High Altitude

Operation

FIGURE 4B - Swivel Connectors, Option

CK10, to Suspend the Heater from 1”

Pipes















Be sure the threaded swivel

connectors are locked to the

heater as illustrated.

FIGURE 4A - Suspending the Heater with

Rods from the Threaded Nut Retainers













Be sure the threaded hanger rods are

locked to the heater as illustrated. Length

of threaded rod extending into the heater

MUST NOT exceed 1/2” (13mm).

Recommended maximum hanger rod

length is 6 feet (1.8M).

WARNING: Unit

must be level for

proper operation.

Do not place or add

additional weight to

the suspended heater.

Hazard Levels,

page 2.

Form I-UEAS, Page 8

WARNING: This appliance is equipped for a maximum

gas supply pressure of 1/2 psi, 3.5 kPa, or 14 inches wa-

ter column. Supply pressure greater than 1/2 psi requires

installation of an additional lockup-type service regulator

external to the unit.

WARNING: 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 test-

ed. Cap or plug the supply line.

Test Pressures Below 1/2 PSI: Before testing, close the

manual valve on the heater.

All piping must be in accordance with requirements outlined in the National

Fuel Gas Code ANSI Z223.1/NFPA 54 (latest edition) or CSA-B149.1 and

B149.2 (See Paragraph 2). Gas supply piping installation should conform

with good practice and with local codes. Support gas piping with pipe hang-

ers, metal strapping, or other suitable material; do not rely on the heater to

support the gas pipe.

The heater is oriced for operation with natural gas having a heating value

of 1000 (± 50) BTU per cubic ft or propane gas with a heating value of 2500

(± 100) BTU per cubic ft. If the gas at the installation does not meet these

specications, consult the factory for proper oricing.

Pipe joint compounds (pipe dope) shall be resistant to the action of lique-

ed petroleum gas or any other chemical constituents of the gas being

supplied.

7. Mechanical

Sizing Gas Supply Line

7.1 Gas Piping and Pressure

7.1.1 Gas Supply

Capacity of Piping

Cubic Feet per Hour based on 0.3" w.c. Pressure Drop

Specic Gravity for Natural Gas -- 0.6 (Natural Gas -- 1000 BTU/Cubic Ft)

Specic Gravity for Propane Gas -- 1.6 (Propane Gas -- 2550 BTU/Cubic Ft)

Length Diameter of Pipe

of 1/2" 3/4" 1" 1-1/4" 1-1/2" 2"

Pipe Natural Propane Natural Propane Natural Propane Natural Propane Natural Propane Natural Propane

20' 92 56 190 116 350 214 730 445 1100 671 2100 1281

30' 73 45 152 93 285 174 590 360 890 543 1650 1007

40' 63 38 130 79 245 149 500 305 760 464 1450 885

50' 56 34 115 70 215 131 440 268 670 409 1270 775

60' 50 31 105 64 195 119 400 244 610 372 1105 674

70' 46 28 96 59 180 110 370 226 560 342 1050 641

80' 43 26 90 55 170 104 350 214 530 323 990 604

90' 40 24 84 51 160 98 320 195 490 299 930 567

100' 38 23 79 48 150 92 305 186 460 281 870 531

125' 34 21 72 44 130 79 275 168 410 250 780 476

150' 31 19 64 39 120 73 250 153 380 232 710 433

175' 28 17 59 36 110 67 225 137 350 214 650 397

200' 26 16 55 34 100 61 210 128 320 195 610 372

Note: When sizing supply lines, consider possibilities of future expansion and increased requirements.

Refer to National Fuel Gas Code for additional information on line sizing.

Form I-UEAS, P/N 221232 R6, Page 9

FIGURE 5 - Gas

connection is at the

pipe nipple that extends

outside the cabinet

Illustration shows

both a vertical and

horizontal gas supply;

requirements are the

same.







































 

Install a ground joint union and manual shutoff valve upstream of the unit

control system, as shown in FIGURE 5. Installation of a trap with a mini-

mum 3” (76mm) drip leg is required.

7.1.2 Gas Connections

Leak-test all connections by brushing on a leak-detecting solution.

WARNING: All components of a gas supply system must

be leak tested prior to placing equipment in service.

NEVER TEST FOR LEAKS WITH AN OPEN FLAME. Failure

to comply could result in personal injury, property damage

or death.

Gas Connection

Size inches

130,180 1/2

260, 310 3/4

7.1.3 Valve Outlet or

Orice Pressure Setting

Measuring valve outlet gas pressure cannot be done until the heater is in

operation. It is included in the steps of the “Check-Test-Start” procedure in

Paragraph 11. The following warnings and instructions apply.

WARNING: Valve outlet gas pressure must never exceed

3.5” w.c. for natural gas and 10” w.c. for propane gas.

For Natural Gas:When the heater leaves the factory, the combination gas

valve is set so that the valve outlet gas pressure for a single-stage valve

is regulated to 3.5” w.c. Inlet supply pressure to the valve for natural gas

must be a minimum of 5” w.c. or as noted on the rating plate and a maxi-

mum of 14” w.c.

For Propane: The heater is shipped factory equipped for use with natural

gas. A propane conversion kit is included. Follow the instructions in Para-

graph 7.1.4 to convert for use with propane.

At startup, measure the valve outlet pressure. Refer to the pressure chart

on page 12 for correct outlet pressure.

When using propane, the inlet supply pressure to the valve must be a mini-

mum of 11” w.c. and a maximum of 14” w.c.

NOTE: A gas conversion kit

for changing from natural gas

to propane is included with

each heater. See Paragraph

7.1.4 for conversion instruc-

tions.

7. Mechanical

(cont’d)

7.1 Gas Piping and

Pressure (cont’d) The unit is equipped with a nipple

that extends outside the cabinet.

The gas connection is either 1/2”

or 3/4”.

Form I-UEAS, Page 10

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