Reznor WS Instructions d'installation et d'utilisation

Revision: WS-IOM (12-22) 1042506-0

HYDRONIC UNIT HEATER INSTALLATION, OPERATION,

AND MAINTENANCE

Supersedes: — (Original Version)

MODEL WS

⚠ WARNING ⚠

• Be sure to read and understand the installation, operation, and service instructions in this

manual.

• Installation should be done by a qualiﬁed agency in accordance with these instructions.The

qualiﬁed service agency installing this heater is responsible for the installation.

• This appliance is not intended for use by persons with reduced physical, sensory, or mental

capabilities or lack of experience and knowledge, unless they have been given supervision

or instruction concerning use of the appliance by a person responsible for their safety.

• Children should be supervised to ensure that they do not play with the appliance.

• Do not store or use gasoline or other ﬂammable vapors and liquids in the vicinity of this or

any other appliance.

• Do not remove the security labels. If they are unreadable contact an authorized distributor

for replacement labels.

• The heat exchanger coils must be protected against freezing.

DO NOT DESTROY. PLEASE READ CAREFULLY. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

2WS-IOM (12-22) 1042506-0

TABLE OF CONTENTS

GENERAL INFORMATION ................................................................... 3

Important Safety Information................................................................. 3

Warranty ................................................................................ 3

Certiﬁcation .............................................................................. 3

Installation Codes ......................................................................... 3

Heater Location........................................................................... 4

Mounting Height ........................................................................ 4

Heater Throw and Cover ................................................................. 4

Acoustical Considerations ................................................................ 5

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Clearances .............................................................................. 6

Weights ................................................................................. 6

INSTALLATION ............................................................................ 7

Unpacking and Inspection................................................................... 7

Pre-Installation Checklist.................................................................... 7

Field-Installed Options...................................................................... 7

Installing Vertical Louvers (Option HL10) .................................................... 7

Installing Airﬂow Optimizer (Option HL11) .................................................... 8

Heater Mounting .......................................................................... 8

Wall-Mounting Heater for Horizontal Discharge ................................................ 8

Suspending Heater for Horizontal Discharge Using Threaded Rods or Eyebolts ...................... 9

Suspending Heater for Vertical Discharge Using Suspension Plates .............................. 10

Piping Connections ....................................................................... 10

Electrical Connections..................................................................... 12

Cleaning and Water Treatment .............................................................. 13

OPERATION ............................................................................. 13

Pre-Startup Checklist ..................................................................... 13

Startup................................................................................. 13

Fan Speed Adjustment .................................................................... 14

Louver Adjustment ....................................................................... 15

MAINTENANCE........................................................................... 15

Service Checklist......................................................................... 16

Heat Exchanger Maintenance............................................................... 16

Fan and Motor Maintenance ................................................................ 16

TROUBLESHOOTING ...................................................................... 17

INSTALLATION RECORD (TO BE COMPLETED BY INSTALLER)................................... 20

WS-IOM (12-22) 1042506-0

GENERAL INFORMATION

•This unit heater has been tested for capacity and efﬁciency so as to provide many years of safe and dependable

comfort providing it is properly installed and maintained. With regular maintenance, this unit will operate satisfactorily

year after year. Abuse, improper use, and/or improper maintenance can shorten the life of the appliance and

create unsafe hazards.

•To achieve optimum performance and minimize equipment failure, it is recommended that periodic maintenance

be performed on this unit. The ability to properly perform maintenance on this equipment requires certain tools

and mechanical skills.

•This manual applies only to the models listed. Accessories referenced may not apply to all models.

•Hydronic unit heaters can be operated with hot water or steam at a high pressure. Warm water, hot water, or

steam produced by a boiler ﬂows through the heat exchanger. Standard hot water units are option HA11. Steam

units are option HA12.

•These hydronic unit heaters are designed and constructed for industrial, commercial, or sports facility heating.

Important Safety Information

Please read all information in this manual thoroughly and become familiar with the capabilities and use of your

appliance before attempting to operate or maintain this unit. Pay attention to all dangers, warnings, cautions, and

notes highlighted in this manual. Safety markings should not be ignored and are used frequently throughout to

designate a degree or level of seriousness.

DANGER: A danger statement describes a potentially hazardous situation that if not avoided, will result in severe

personal injury or death and/or property damage.

WARNING: A warning statement describes a potentially hazardous situation that if not avoided, can result in severe

personal injury and/or property damage.

CAUTION: A caution statement describes a potentially hazardous situation that if not avoided, can result in minor

or moderate personal injury and/or property damage.

NOTE: A note provides important information that should not be ignored.

⚠ CAUTION ⚠

To prevent damage to the unit or to its internal components, it is recommended that two wrenches

be used when loosening or tightening nuts. Do not over tighten!

Warranty

NOTE: The standard unit heater warranty covers only original defects and does not cover the

repairs resulting from a water condition such as corrosion or scale. It is up to you and is your

sole responsibility to ensure that a proper water treatment and maintenance program is correctly

followed at all times.

Refer to the limited warranty form in the literature bag provided with the unit. The warranty is void if:

•Wiring is not in accordance with the diagram furnished with the heater.

•The air delivery system is modiﬁed.

•Improper water conditions result in excessive corrosion or leaks.

Certiﬁcation

These unit heaters are listed by Intertek for use in the United States and in Canada.

Installation Codes

These units must be installed in accordance with local building codes. Local authorities having jurisdiction should

be consulted before installation is made to verify local codes and installation procedure requirements.

4WS-IOM (12-22) 1042506-0

GENERAL INFORMATION—CONTINUED

Heater Location

⚠ CAUTION ⚠

• Do not locate the heater where it may be exposed to water spray, rain, or dripping water.

• When installing the hydronic unit heater in applications where the heater can be subject to damage

from balls in gymnasiums and/or courts, it is necessary to ﬁt the heater with a frame and a safety

net. The directional air louvers on the front of the unit should especially be protected.

For best results, the heater should be mounted with certain rules in mind:

•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 working zone as possible, and this fact should

be kept in mind when determining 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 airﬂow will be deﬂected 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.

Mounting Height

⚠ WARNING ⚠

If touched, the internal heater surfaces that are accessible from outside the heater will cause burns.

Suspend the heater a minimum of 5 feet (1.5 meters) above the ﬂoor.

In general, a unit should be located 10–20 feet (3.5–6.1 meters) above the ﬂoor. At those points where inﬁltration

of cold air is excessive, such as at entrance doors and shipping doors, it is desirable to locate the unit so that it will

discharge directly toward the source of cold air from a distance of 15–20 feet (4.6–6.1 meters).

Heater Throw and Cover

All units can be installed for either horizontal or vertical discharge. Table 1 lists throw and cover data for standard

adjustable horizontal louvers on heaters suspended at varying mounting heights.

Table 1. Heater Throw and Cover with Standard Horizontal Louvers

Unit Size

Fan Speed

Low High Low High Low High Low High

Horizontal Discharge Vertical Discharge

Dimension H*

(Feet (Meters))

Throw

(Feet (Meters))

Dimension H*

(Feet (Meters))

Cover

(Feet2(Meters2))

18/24 10 (3) 10 (3) 16 (5) 23 (7) 10 (3) 11 (3.5) 344 (32) 473 (44)

23/33 10 (3) 10 (3) 16 (5) 25 (7.5) 10 (3) 11 (3.5) 366 (34) 516 (48)

44/62 10 (3) 11 (3.5) 18 (5.5) 26 (8) 11 (3.5) 13 (4) 387 (36) 538 (50)

60/85 11 (3.5) 13 (4) 25 (7.5) 36 (11) 13 (4) 15 (4.5) 484 (45) 646 (60)

78/110 11 (3.5) 13 (4) 33 (10) 46 (14) 15 (4.5) 16 (5) 538 (50) 753 (70)

96/120 13 (4) 15 (4.5) 33 (10) 46 (14) 15 (4.5) 16 (5) 538 (50) 753 (70)

140/175 15 (4.5) 16 (5) 39 (12) 52 (16) 16 (5) 18 (5.5) 646 (60) 861 (80)

190/238 16 (5) 18 (5.5) 46 (14) 59 (18) 18 (5.5) 20 (6) 968 (90) 1184 (110)

300/350 18 (5.5) 20 (6) 66 (20) 85 (26) 23 (7) 30 (9) 1399 (130) 1722 (160)

*Maximum mounting height (see Figure 1).

WS-IOM (12-22) 1042506-0

Figure 1. Heater Throw and Cover (Refer to Table 1)

Acoustical Considerations

Refer to sound level data listed in Table 2 when determining unit location based on acoustical considerations.

Table 2. Acoustical Data

Fan

Speed

Unit Size

18/24 23/33 44/62 60/85 78/110 96/120 140/175 190/238 300/350

Sound level (dBa) @ 16-1/2 feet

Low 45 46 49 54 57 47 49 52 61

High 52 54 58 63 65 52 55 60 67

THROW

COVER

6WS-IOM (12-22) 1042506-0

GENERAL INFORMATION—CONTINUED

Dimensions

Figure 2. Dimensions (Refer to Table 3)

Table 3. Dimensions

Dimension

(See Figure 2)

Unit Size

18/24, 23/33 44/62 60/85 78/110 96/120 140/175 190/238 300/350

Inches (mm)

A 16-7/16 (418) 18-9/16 (472) 20-11/16 (526) 22-13/16 (580) 24-15/16 (634) 27-1/16 (688) 29-3/16 (742) 35-7/16 (900)

B 11-1/8 (282) 13-1/4 (336) 15-3/8 (390) 17-1/2 (444) 19-5/8 (498) 21-3/4 (552) 23-7/8 (606) 30-1/16 (764)

C 18-5/16 (465) 19-3/16 (488) 20-3/16 (513) 22-5/8 (575)

D 12-5/8 (321) 14-3/4 (375) 16-7/8 (429) 19 (483) 21-1/8 (537) 23-1/4 (591) 25-3/8 (645) 31-5/8 (803)

E 8-11/16 (220) 8-1/4 (210)

F 5-1/8 (130) 5-1/2 (140)

G 3-15/16 (100) 4-3/4 (120) 5-1/8 (130)

Ø 3/4 (19) 1-1/4 (32) 1-1/2 (38)

Fan diameter 11-13/16 (300) 13-3/4 (350) 15-3/4 (400) 17-11/16 (450) 19-11/16 (500) 21-5/8 (550) 25-9/16 (650)

Clearances

Always maintain a minimum clearance of 6 inches (150 mm) behind the unit for maintenance of the motor and fan.

Weights

Table 4. Weights

Unit Size

18/24 23/33 44/62 60/85 78/110 96/120 140/175 190/238 300/350

Pounds (kg)

37 (17) 44 (20) 49 (22) 55 (25) 66 ( 30) 75 (34) 88 (40) 101 (46) 146 (66)

11-1/2

(290)

1-9/16

(40)

1-9/16

(40)

1-1/16 (26.5)

NOTE: Inches (mm)

WS-IOM (12-22) 1042506-0

INSTALLATION

⚠ WARNING ⚠

Always wear work gloves when installing or servicing the heater.

Unpacking and Inspection

•The unit was test-operated and inspected at the factory prior to crating and was in operating condition.

•If, upon removing it from its crate, the unit has been found to have incurred any damage in shipment, document

the damage with the transporting agency and contact an authorized Factory Distributor. If you are an authorized

Distributor, follow the FOB freight policy procedures.

Pre-Installation Checklist

Check the rating plate for the water and electrical requirements of the heater to ensure that they are compatible

with the water and electric supplies at the installation site.

Read this manual and become familiar with the installation requirements of your particular heater.

If you do not have knowledge of local requirements, check with local agencies who might have requirements

concerning this installation.

Before beginning, make preparations for necessary supplies, tools, and manpower.

Check to see if there are any ﬁeld-installed options (refer to Field-Installed Options section) that need to be

assembled/installed prior to unit installation. Ensure that all options ordered are at the installation site.

Field-Installed Options

Table 5. Field-Installed Options

Option Name Description

HL10 Vertical louvers Direct discharge air to provide wider throw pattern

HL11 Airﬂow optimizer Greatly increases throw of horizontal discharge units

HT15 Thermostat

CM4 Guard/cover Thermostat

Installing Vertical Louvers (Option HL10)

NOTE: Vertical louvers can be used with either horizontal or vertical discharge installations, but

they are recommended for vertical discharge units to create a four-way discharge pattern.

1. Position vertical louver assembly (see Figure 3) on face of heater and align existing mounting holes.

2. Secure vertical louver assembly to heater using fasteners provided in option kit.

Figure 3. Vertical Louver Assembly

8WS-IOM (12-22) 1042506-0

Figure 4. Airﬂow Optimizer Assembly

Heater Mounting

⚠ WARNING ⚠

• Before mounting the heater, check the supporting structure to verify that it has sufﬁcient load-

carrying capacity to support the weight (refer to Weights section) of the unit.

• Ensure that the heater is not supported by piping.

• The heater must be level for proper operation. DO NOT place or add additional weight to a wall-

mounted or suspended heater.

• DO NOT allow any foreign objections into the heat exchanger coil. Foreign objects can damage

the heat exchanger and can damage or destroy pumps and boilers.

Wall-Mounting Heater for Horizontal Discharge

1. Determine installation height and secure ﬁeld-supplied brackets to wall as shown in Figure 5 using ﬁeld-supplied

hardware.

2. Raise heater using suitable hoist or lift and secure heater to brackets as shown in Figure 5 using M8 metric

screws and ﬂat washers provided.

INSTALLATION—CONTINUED

Field-Installed Options—Continued

Installing Airﬂow Optimizer (Option HL11)

NOTE: For horizontal discharge installations, the airﬂow optimizer increases air throw, which

results in energy savings and better environmental control.

1. Remove existing horizontal louvers by pushing each louver toward spring to release louver.

2. Position airﬂow optimizer assembly (see Figure 4) on face of heater and align existing mounting holes.

3. Secure airﬂow optimizer assembly to heater using fasteners provided in option kit.

4. Adjust wingnut on threaded rod as necessary to set optimizer louvers for desired airﬂow.

WS-IOM (12-22) 1042506-0

Figure 5. Wall-Mounting Heater

Suspending Heater for Horizontal Discharge Using Threaded Rods or Eyebolts

1. Install ﬁeld-supplied threaded rods or eyebolts as shown in Figure 6.

2. Determine installation height, raise heater using suitable hoist or lift, and suspend heater using threaded rods or

wire rope or chains connected to eyebolts.

Figure 6. Suspending Heater for Horizontal Discharge (Refer to Table 6)

Table 6. Suspension Point Dimensions

Unit Size

18/24, 23/33, 44/62, 60/85 78/110, 96/120, 140/175 190/238, 300/350

Dimension A*(Inches (mm))

4 (102) 4-3/4 (121) 5-1/8 (130)

*See Figure 6.

1/2 (13)

7/8 (22)

1-9/16

(40)

7/8 (22)

1-9/16

(40)

NOTE: Inches (mm)

10 WS-IOM (12-22) 1042506-0

INSTALLATION—CONTINUED

Heater Mounting—Continued

Suspending Heater for Vertical Discharge Using Suspension Plates

NOTE: The optional vertical louvers are recommended for vertical airﬂow units for four-way air

distribution.

1. Install suspension plates, M8 metric screws, and ﬂat washers provided with unit as shown in Figure 7.

2. Determine installation height, raise heater using suitable hoist or lift, and suspend heater using bars, wire rope,

or chains connected to suspension plates.

Figure 7. Suspending Heater for Vertical Discharge

Piping Connections

⚠ WARNING ⚠

• Maximum operation pressure is 150 psi (10 bar).

• Flange seals must not be made with rubber or other material that melts easily. In the event of

overheated water, rubber seals may melt.

• Mount a thermostatic air vent if the distribution ring of the water or steam is in a lower position

than the heater.

•Connect inlet and outlet piping using a three-part joint union and ball valve (see Figure 8) sealed with pipe sealant.

•Connect hot water piping in accordance with piping diagram shown in Figure 9.

•Connect steam piping in accordance with piping diagram shown in Figure 10.

Figure 8. Three-Part Joint Union and Ball Valve

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