Raypak 0133-4001 WH, 0133-4001 User Manual

INSTALLATION
AND OPERATING
INSTRUCTIONS

TM

RAYTHERM
HOT WATER SUPPLY

HEATERS

Models 0133-4001
Types WH & NH

CATALOG NO. 3000.52G
Effective: 11-01-04
Replaces: 02-01-04

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors and liquids or other combustible
materials in the vicinity of this or any other appliance. To do so may result in an explosion
or fire.

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause
property damage, personal injury or loss of life. Refer to this manual. Installation and service
must be performed by a qualified installer, service agency or the gas supplier.

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 the fire department.

This manual should be maintained in legible
condition and kept adjacent to the heater or in a
safe place for future reference.

P/N 241075

TABLE OF CONTENTS

RECEIVING EQUIPMENT ........................................ 3

MODEL IDENTIFICATION ........................... 3

GENERAL SPECIFICATIONS ....................... 3

GENERAL SAFETY PRECAUTIONS .............. 4

INSTALLATION INSTRUCTIONS .............................. 5

CLEARANCES .......................................... 6

SPECIFICATIONS AND DIMENSIONS ........... 7

OUTDOOR INSTALLATIONS ....................... 10

HIGH WIND CONDITIONS ........................... 10

COMBUSTION AIR .................................... 10

VENTING ................................................. 11

VENT PIPING ............................................ 14

VENT DAMPER INSTALLATION ................... 15

PLUMBING ........................................................... 17

GAS SUPPLY CONNECTIONS ..................... 17

GAS PRESSURE REGULATOR .................... 18

VENTING OF DIAPHRAGM GAS

COMPONENTS ......................................... 18

FLOW RATES ........................................... 19

UNITEMP 80 SPECIFICATIONS ................... 20

PIPING DIAGRAMS ................................................ 21

TYPE WH UNITEMP 80 ............................... 21

TYPE NH INSTANTANEOUS ........................ 22

TYPE NH DUAL MODELS............................ 23

CONTROLS ........................................................... 24

RELIEF VALVE .......................................... 24

ECONOMASTER CONTROL ........................ 24

ELECTRONIC IGNITION ............................. 24

OPERATING CONTROLS ............................ 24

LIMIT CONTROLS .................................................. 25

HIGH LIMIT............................................... 25

FLOW SWITCH ......................................... 25

100% PILOT SAFETY ................................. 25

LOW WATER CUT-OFF .............................. 25

HIGH AND LOW GAS PRESSURE SWITCHES 25

COMPONENT IDENTIFICATION ............................... 26

ELECTRICAL CONNECTIONS .................................. 27

LOCATION OF CONTROLS ..................................... 28

START-UP PROCEDURES ...................................... 30

GENERAL ................................................ 30

PUMP AND MOTOR ................................... 30

GENERAL SAFETY PRECAUTIONS .............. 31

LIGHTING INSTRUCTIONS ......................... 32

AFTER START-UP ..................................... 33

INSPECTION PROCEDURES ................................... 33

BURNERS ................................................ 33

CONTROLS .............................................. 33

INSPECTION PROCEDURES....................... 34

ADDENDA: LOW NOx HEATERS 181-401 .................. 35

TROUBLESHOOTING ELECTRICAL ......................... 37

WIRING DIAGRAMS ............................................... 38

WH2 - 182-260 .......................................... 38

WH2 - 330-400 .......................................... 39

WH2 - 514-624 .......................................... 40

WH2 - 724-1336 ......................................... 41

WH2 - 1414-1826 ....................................... 42

WH2 - 2100-2500 ....................................... 43

WH2 - 3001-4001 ....................................... 44

WH1 - 181-261 LOW NOx ............................ 45

WH1 - 331-401 LOW NOx ............................ 46

TROUBLESHOOTING MECHANICAL ........................ 47

TROUBLESHOOTING PUMPS .................................. 48

SERVICE AND MAINTENANCE PROCEDURES ........... 48

TUBE CLEANING ...................................... 48

BURNER TRAY REMOVAL .......................... 49

GAS VALVE REMOVAL............................... 49

MAIN BURNER AND ORIFICE REMOVAL ...... 49

PILOT REMOVAL AND CLEANING................ 49

HIGH LIMIT OR TANKSTAT REMOVAL .......... 49

HEAT EXHANGER REMOVAL ...................... 49

COMBUSTION CHAMBER REMOVAL ........... 50

CONTROL WELL REPLACEMENT ................ 50

TUBE REPLACEMENT ............................... 50

CLEANING FLUE GAS PASSAGEWAYS ........ 51

REPLACEMENT PARTS .......................................... 51

WARRANTY .......................................................... 52

2

RECEIVING EQUIPMENT

ALL MODELS (APPROVED)

On receipt of the equipment, visually check for
external damage to the carton or the shipping crate. If
the carton or shipping crate is damaged, make a note
on the Bill of Lading and report the damage to the
Carrier immediately. Remove the heater from the
carton or the shipping crate.

Do NOT use the shipping crate base as an instal­lation base.

On occasion, items are shipped loose. Be sure that
you receive the number of packages indicated on the
Bill of Lading.

When ordering parts, you must specify Model and
Serial Number of the heater. When ordering under
warranty conditions, you must also specify date of
installation.

Raypak recommends that this manual be reviewed
thoroughly before installing your Raypak heater. If
there are any questions which this manual does not
answer, please contact the factory or your local Raypak
representative.

Claims for shortages and damages must be filed
with carrier by consignee. Permission to return goods
must be factory-authorized and are subject to a stock­ing charge.

Purchased parts are subject to replacement only
under the manufacturer's warranty. Debits for defec­tive replacement parts will not be accepted and will be
replaced in kind only per our standard warranties.

MODEL IDENTIFICATION

The model identification number and the heater
serial number are found on the heater data plate. The
model number will have the form WH1-0514A or simi­lar depending on the heater model.
(WH = Hot Water Supply System, 1 = on/off firing, 0514
= size of heater).

Rated inputs are suitable for up to 2000 feet eleva­tion. For elevations above 2000 feet, reduce input 4%
for each 1000 feet above sea level.

GENERAL SPECIFICATIONS

The Raypak water heaters are design certified and
tested under the latest requirements of the American
National Standard, ANSI Z21.10.3. Each heater has
been constructed and pressure tested in accordance
with the requirements of Section IV of the American
Society of Mechanical Engineers Code, and factory fire
tested.

All models are National Board approved. Tem­perature and pressure gauge is standard. Intermittent
ignition device is standard on models 0514 and up.

Model 0133 has 4-pass heat exchanger, 1 tube per
pass.

Models 0181-0401 have 2-pass heat exchangers,
5 tubes first pass, 4 tubes second pass.

Models 0514-1826 have 2-pass heat exchangers,
5 tubes first pass, 4 tubes second pass.

Models 2100-4001 have 2-pass heat exchangers,
9 tubes per pass.

Models 926-4001 have optional single pass with
cast iron headers only.

HOT WATER SUPPLY HEATERS

All Raypak hot water supply heaters are ASME and
design certified as hot water heaters, with 125 PSI
pressure relief valves.

TYPE WH1 WITH ON/OFF CONTROLS

Models 0133-4001

To be used with storage tank systems. Available
with integrally mounted pump, factory mounted and
wired for models 0133-1826. Models 181,261,331 and
401 are Low NOx Hot Water Heaters.

TYPE WH2 WITH MODULATING CONTROLS

Models 0133-4001

Hot water supply heater with 110°-170°F gas
modulation. Available with integrally mounted pump,
factory mounted and wired for models 0133-1826. To
be used with storage tank systems.

TYPE WH3 WITH 2-STAGE CONTROLS

Models 0181-4001

Hot water supply heater with low-high fire for
2-stage control. Available with integrally mounted
pump, factory mounted and wired for models 0181-

1826. To be used with storage tank systems.
TYPE NH INSTANT-PAK

Models 0514-1826

Tankless instantaneous direct fired hot water sup­ply heater with 110°-170°F gas modulation, factory
mounted bronze body or cast iron bronze fitted pump
and flow switch.

CALIFORNIA PROPOSITION 65 WARNING:

This product contains chemicals known to the State
of California to cause cancer, birth defects or other

reproductive harm.

3

!

General Safety Precautions

Be sure to read and understand the entire Instruction Manual before attempting to install or operate this water heater. Pay
particular attention to the following general Safety Precautions. Failure to follow these warnings could result in a fire or
explosion, causing property damage, bodily injury or death. Should you have any problems understanding the instructions
in this manual, STOP, and get help from a qualified installer or service technician or the gas supplier.

!

WARNING

Gasoline, as well as other flammable materials and liquids
(adhesives, solvents, etc.), and the vapors they produce, are
extremely dangerous. DO NOT handle, use or store gasoline
or other flammable or combustible materials anywhere near
or in the vicinity of a water heater. Be sure to read and follow
the warning label pictured below and other labels on the water
heater, as well as the warnings printed in this manual. Failure
to do so can result in property damage, bodily injury, or death.

!

DANGER

Failure to install the drafthood and properly vent the water
heater to the outdoors as outlined in the Venting Section of
this manual can result in unsafe operation of the water heater.
To avoid the risk of fire, explosion, or asphyxiation from
carbon monoxide, never operate this water heater unless it is
properly vented and has an adequate air supply for proper
operation. Be sure to inspect the vent system for proper
installation at initial start-up; and at least annually thereafter.
Refer to the Venting section of this manual (pg. 11) for more
information regarding vent system inspections.

DANGER

!

!

DANGER

PROPANE MODELS – Propane must be used with great
caution.

• It is heavier than air and will collect first in lower areas
making it hard to detect at nose level.

• Make sure to look and smell for propane leaks before
attempting to light appliance. Use a soapy solution to check
all gas fittings and connections. Bubbling at a connection
indicates a leak that must be corrected. When smelling to
detect a propane leak, be sure to sniff near the floor too.

• Gas detectors are recommended in propane applications
and their installation should be in accordance with the
manufacturer's recommendations and/or local laws, rules,
regulations or customs.

• It is recommended that more than one method be used to
detect leaks in propane applications.

IF PROPANE IS PRESENT OR SUSPECTED:

• DO NOT attempt to find the cause yourself;

• DO NOT try to light any appliance;

• DO NOT touch any electrical switch;

• DO NOT use any phone in your building.

• Leave the building immediately and make sure that every­one else leaves also.

• Leave the doors open for ventilation and contact the gas
supplier, a qualified service agency or the fire department.

• Keep the area clear until the service call has been made,
the leak is corrected, and a qualified agency has determined
the area to be safe.

Vapors from flammable liquids
will explode and catch fire
causing death or severe
burns.
Do not use or store flammable
products such as gasoline sol­vents or adhesives in the same
room or area near the water
heater.

Keep flammable products:

1. Far away from heater,

2. In approved containers,

3. Tightly closed and

4. Out of children's reach.
Installation:

Do not install water heater where flammable products will be
stored or used unless the main burner and pilot flames are at
least 18" above the floor. This will reduce, but not eliminate, the

risk of vapors being ignited by the main burner or pilot flame.

Read and follow water heater warnings and instructions. If
owners manual is missing, contact the retailer or manufacturer.

Water heater has a main
burner and pilot flame.
The pilot flame:

1. Is on all the time or intermit­tently (IID).

2. Will ignite flammable va­pors.

Vapors:

1. Cannot be seen,

2. Are heavier than air,

3. Go a long way on the floor,

4. Can be carried from other
rooms to the pilot flame by air
currents.

!

WARNING

Both propane and natural gas have an odorant added to help
detection. Some people may not physically be able to smell
or recognize this odorant. If unsure or unfamiliar about the
smell associated with propane or natural gas, ask the gas
supplier. Other conditions, such as "Odorant Fade", which
causes the odorant to "fade", or diminish in intensity can also
hide or camouflage a gas leak.

!

DANGER

Water heaters utilizing propane are different from natural gas
models. A natural gas heater will not function safely on
propane and vice versa. Conversion from natural gas to
propane (or vice versa) must be done by a qualified service
technician. To avoid possible equipment damage, personal
injury or fire: DO NOT connect this water heater to a fuel type
not in accordance with unit data plate. Use propane for
propane units, natural gas for natural gas units. These units
are not certified for any other type fuel.

!

WARNING

Propane appliances should not be installed below-grade (for
example, in a basement) if such installation is prohibited by
federal, state and/or local laws, rules, regulations or customs.

4

INSTALLATION INSTRUCTIONS

12"

Minimum

12"

Minimum

4"

Minimum

HEATER

Sheet Metal

24 Gauge

INSTALLATION CODES

Installation must be in accordance with local codes, or, in the absence of local codes, with the latest editions
of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, and the National Electrical Code, ANSI/NFPA 70. In
Canada installations must conform with the current CAN/CGA B149.1 or .2 and the Canadian Electrical Code
Part 1 CSA C22.2 No.1. Where required by the authority having jurisdiction, the installation must conform to
American Society of Mechanical Engineers Safety Code for Controls and Safety Devices for Automatically Fired
Heaters, CSD-1.

INSTALLATION BASE

The heater should be mounted on a level, non-combustible surface. Heater must not be installed on
carpeting. The heater can be installed on a combustible surface only when the appropriate listed floor shield base
is provided. An optional listed floor shield base is available for factory installation with the heater on all indoor
models. Do NOT use the shipping base crate as an installation base.

NOTE: The heater should be located in an area where water leakage will not result in damage to the area adjacent
to the appliance or to the structure. When such locations cannot be avoided, it is recommended that a suitable
drain pan, adequately drained, be installed under the appliance. The pan must not restrict air flow.

In addition, the heater shall be installed such that the gas ignition system components are protected from water
(dripping, spraying, rain, etc.) during appliance operation and service (circulator replacement, control replace­ment, etc.).

Combustible floorshield ordering information:

ALTERNATE METHOD FOR PROVIDING A NON­COMBUSTIBLE BASE

Fig.# 8148

5

CLEARANCES

INSTALLATION CLEARANCES

(All Dimensions Are In Inches)

CLEARANCES FROM COMBUSTIBLE
SURFACES

Note 1:

Combustible floor shield is required when heater is to
be installed on a combustible surface. (See ordering
info. on pg.5.)

CLEARANCES TO PROTECTED SURFACES

Note: The heater shall be installed in a space large in
comparison to the size of the heater. Large space is
defined as having a volume at least sixteen (16) times
the total volume of the heater.

Note 2:

Servicing Clearances: Provide at least 24" (Models
0133-1826), 48" (Models 2100-4001) in front of unit for
removal & servicing of the Controls & Burner Tray.
Provide at least 18" on side opposite water connec­tions for deliming of Heat Exchanger Tubes.

*Vent includes factory supplied drafthoods and does
not include field supplied vent systems above the
drafthood. On Models 2100-4001 drafthood is built
into heater.

6

SPECIFICATIONS AND DIMENSIONS

MODEL 133

NOTE:
Ratings are shown for elevations up to 2,000 feet. For elevations over
2,000 feet, reduce ratings 4% for each 1,000 feet above sea level.

* Recovery based on manufacturer's rating.

MODELS 182-400 and 181-401

* Recovery based on manufacturer's rating.

NOTE:
Ratings are shown for elevations up to 2,000
feet. For elevations over 2,000 feet, reduce
ratings 4% for each 1,000 feet above sea level.

Bold type indicates Low NOx models.

7

MODELS 514-824

*Recovery based on manufacturer's rating.

NOTE:
Ratings are shown for elevations up to 2,000 feet. For
elevations over 2,000 feet, reduce ratings 4% for each 1,000
feet above sea level.

MODELS 962-1826

*Recovery based on manufacturer's rating.

NOTE:
Ratings are shown for elevations
up to 2,000 feet. For elevations
over 2,000 feet, reduce ratings
4% for each 1,000 feet above sea
level.

8

MODELS 926-1758

NOTE:
Ratings are shown for elevations up to 2,000 feet. For elevations over
2,000 feet, reduce ratings 4% for each 1,000 feet above sea level.

*Recovery based on manufacturer's rating.

MODELS 2100-4000

*Recovery based on manufacturer's rating.

NOTE:
Ratings are shown for elevations up to 2,000 feet. For
elevations over 2,000 feet, reduce ratings 4% for each 1,000
feet above sea level.

9

4

foot

Minimum

4

foot

Minimum

1

foot

Minimum

4

foot

Minimum

3

foot

Minimum

10

foot

Minimum

Forced Air Inlet

OUTDOOR WATER HEATERS

These heaters are design certified for out-

door installation. Heaters must not be installed
under an overhang of less than three (3) feet from
the top on the heater. Three (3) sides must be
open in the area under the overhang. Roof water
drainage must be diverted away from the heaters
installed under overhangs with the use of gutters.

The point from where the flue products exit

the heater must be a minimum of four (4) feet
below, four (4) feet horizontally from or one (1)
foot above any door, window or gravity inlet to a
building. The top surface of the heater shall be at
least three (3) feet above any forced air inlet, or
intake ducts located within ten (10) feet horizon­tally.

Fig. #8245

HIGH WIND CONDITIONS (Outdoor Units Only)

In areas where high winds are frequent, it may be necessary to locate the heater a minimum of 3' from high

vertical walls, or install a wind break so the heater is not in direct wind current.

COMBUSTION AIR (Indoor Units Only) Air For Combustion And Ventilation

The heater must have both combustion and ventilation air. Minimum requirements for net free air supply

openings are 12 inches from ceiling for ventilation and 12 inches from the floor for combustion air as outlined
in ANSI Z223.1, and any local codes that may have jurisdiction.

CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater.
Measures must be taken to prevent the entry of corrosive chemical fumes to the combustion and ventilation air
supply. Such chemicals include, but are not limited to, chlorinated and/or fluorinated hydrocarbons such as found
in refrigerants, aerosol propellants, dry-cleaning fluids, degreasers, and paint removers. Other harmful elements
may come from bleaches, air fresheners, or mastics. Vapors from these types of products can form corrosive
acid compounds when burned in a gas flame. The resulting acid condensate can damage or substantially reduce
the life of the heater. It may become necessary to provide outside air directly to the heater in order to avoid this
problem.

a. All Air From Inside The Building:

Each opening shall have a minimum net free square
inches as noted:

b. All Air From Outdoors:

When air is supplied directly from outside of building,
each opening shall have a minimum net free square
inches as noted:

NOTE: If louvers, grills or screens are used on the openings, obtain the net free area from their supplier or manufacturer. If
the design free area of a louver is not known nor available, it shall be assumed that wood louvers will have 20-25 percent
free area and metal louvers will have 60-75 percent free area as shown in Sec. 5.3.5 National Fuel Gas Code.

10

VENTING

OUTDOOR INSTALLATIONS

MODEL 133

Step 1: Remove the front (4) screws.
Step 2: Line up outdoor top vent opening over heater

vent opening.

Step 3: Lower outdoor top onto unit lining up slots in

the outdoor top with screws holes in jacket top.

Step 4: Reinstall (5) screws to secure jacket top and

outdoor top to unit.

Fig. #8114

MODELS 181-401 and 182-400

MODELS 514-824
Step 1: Lower outdoor "Stackless" top onto unit.

Position top so it is centered on unit from
side-to-side and front-to-rear.

Fig# 8166

Step 2: Tighten the (4) screws (Shown below) until

they come in contact with the unit jacket top,
then evenly tighten all (4) screws to secure
to unit.

Fig# 8278.1

VENT TERMINAL (Outdoor) Stackless Top Installa­tion

1. Insert tabs into
keyhole (4 places).

Pagoda Top (Shipped Loose with Heater)

2. Snap tabs into keyholes
so as not to pull out.

Fig. #RP8280.1

Fig# 8233

MODELS 926-1758

Heaters are shipped with outdoor vent terminal

factory installed.
MODELS 2100-4001

These units are not certified for outdoor installa-

tion.

11

INDOOR INSTALLATIONS

MODEL 133

Step 1. Shut-off main electrical power switch to heater.
Step 2. Turn heater manual switch, located in upper control panel, to the "OFF" position.
Step 3. Shut-off gas supply and water supply to the heater.
Step 4. Mount drafthood on heater and attach with the 8 sheet metal screws provided. Drafthood

should be positioned with the vent sensor located on the front left side as shown.

Step 5. Remove plastic plug from left side of heater jacket and install the plastic grommet provided.
Step 6. Route flue sensor wire harness through the grommet installed in Step 5.

Fig. #8946

Step 7. Remove door and locate wire from roll out sensor to High Limit with the male/female connector.

BEFORE

INSTALLATION

OF DRAFTHOOD

AFTER

INSTALLATION

OF DRAFTHOOD

Fig. #8947

Step 8. Disconnect male/female connector and attach to the 2 wires from drafthood vent sensor harness.

12

MODELS 181-401 and 182-400
VENT TERMINAL/INDOOR STACK
INSTALLATION

1. Remove the louvered jacket top by removing

four (4) #10 flathead screws.

2. If originally installed, remove "Pagoda" top

from the louvered jacket top.

3. Place the inner stack adapter panel over the

flue collector inside the heater. Make sure

the flanged side of the flue opening is up.

4. Turn the stack (drafthood) upside

down and set it down bottom side up.

5. Turn the jacket top panel (removed in step 1)

upside down and place it through the stack.

6. Attach the three (3) mounting brackets to the

stack using the screws provided and the holes

that are pre-drilled in the stack. Make sure the

brackets are positioned with the flange near the

top side of the stack (see illustration 8246.5).

Caution must be taken not to over tighten and

strip the screw threads.

7. Turn the assembled stack and jacket top, right side

up. The jacket top will be trapped between the

brackets and the top of the stack. Place the stack

over the inner adapter panel flanged hole and

lower the louvered jacket top panel back into its

original position. Reinstall the four (4) green #10

flathead screws removed in step 1 above.

MODELS 514-824
Locate and assemble as shown below. Secure with

screws supplied in envelope in carton.

Fig. # 8167

MODELS 962-1826
Locate and assemble as shown below. Secure with

screws supplied in envelope in carton.

Fig. # 8246.5

Fig. # 8165

MODELS 2100-4001
These models have built-in drafthoods. For proper

operation, the drafthood outlet must be connected to
the venting system.

13

VENT PIPING

WARNING: Indoor heaters require a drafthood that
must be connected to a vent pipe and properly vented
to the outside. Failure to follow this procedure can
cause fire or fatal carbon monoxide poisoning.

Vent piping of the same size as the drafthood outlet
is recommended, however, when the total vent height
is at least ten (10) feet (drafthood relief opening to vent
terminal), the vent pipe size may be reduced as speci­fied in Chapter 10 of the National Fuel Gas Code, ANSI
Z 223.1. Avoid long horizontal runs of vent pipe and too
many elbows. If installation requires horizontal non­vertical runs, the vent pipe must have a minimum of
1/4 inch per foot rise and should be supported at not
more than five foot intervals. Plumber's tape, criss­crossed, will serve to space both horizontal and vertical
piping. Gas vents supported only by the flashing and
extending above the roof more than five feet should be
securely guyed or braced to withstand snow and wind
loads. We recommend use of an insulated vent pipe
spacer through the roofs and walls.

For protection against rain or blockage by snow, the
vent pipe must terminate with a vent cap which com­plies with the local codes or, in the absence of such
codes, to the latest edition of the National Fuel Gas
Code, ANSI Z223.1.

The discharge opening must be a minimum of two
feet vertically from the roof surface and at least 2 feet
higher than any part of the building or equipment within
ten feet. The vent stack shall be at least 5 feet in vertical
height above the drafthood outlet. The vent cap loca­tion shall have a minimum clearance of 4 feet horizon­tally from, and in no case above or below, unless a 4­foot horizontal distance is maintained, from electric
meters, gas meters regulators and relief equipment.
.

10' OR LESS

2' MIN

VENT PIPE

DRAFT HOOD

HEATER

VENT CAP

2' MIN

5' MIN

The weight of the vent stack or chimney must not rest
on heater drafthood. Support must be provided in
compliance with applicable codes. The heater top and
drafthood must be readily removable for maintenance
and inspection. Vent pipe should be adequately sup­ported to maintain proper clearances from combustible
construction Type "B" double wall or equivalent vent
pipe is recommended. However single wall metal vent
pipe may be used as specified in the latest edition of the
National Flue Gas Code ANSI Z223.1.

Manifolds that connect more than one heater to a
common chimney must be sized to handle the com­bined load. Consult available guides for proper sizing
of the manifold and the chimney. At no time should the
area be less than the area of the largest outlet.

Fig. #7043.1

At the time of removal of an existing heater, the follow­ing steps shall be followed with each appliance remain­ing connected to the common venting system placed in
operation, while the other appliances remaining con­nected to the common venting system are not in
operation.

(a) Seal any unused openings in the common venting

system.

(b) Visually inspect the venting system for proper size

and horizontal pitch and make sure there is no
blockage or restriction, leakage, corrosion or
other deficiency which could cause an unsafe
condition.

(c) Insofar as is practical, close all building doors and

windows and all doors between the space in which
the appliances remaining connected to the com­mon venting system are located and other spaces
of the building. Turn on clothes dryers and any
appliance not connected to the common venting
system. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they will oper­ate at maximum speed. Do not operate a summer
exhaust fan. Close fireplace dampers.

14

(d) Place in operation the appliance being inspected.

Follow the lighting instructions. Adjust thermostat
so appliance will operate continuously.

(e) Test for spillage at the drafthood relief opening

after 5 minutes of main burner operation. Use the
flame of a match or candle, or smoke from a
cigarette, cigar or pipe.

(f) After it has been determined that each appliance

remaining connected to the common venting sys­tem is venting properly, return doors, windows,
exhaust fans, fireplace dampers and any other gas
burning appliance to their previous conditions of
use.

VENT DAMPER INSTALLATION

MODELS 133 THROUGH 261
(WHERE REQUIRED)

LOCATION

The vent damper must be located in the vent so

that it serves only the appliance for which it is intended.

If improperly installed, a hazardous condition, such
as an explosion or carbon monoxide poisoning, could
result. Make certain that it is mounted in an accessible
location at least 6 in. from any combustible material or
the heat exchanger and that the position indicator is in
a visible location.

The vent damper must be installed after the appli­ance drafthood, as close to the drafthood as practi­cable, and without modification of the drafthood.

(g) Any improper operation of the common venting

system should be corrected so that the installation
conforms with the latest edition of the National Fuel
Gas Code, ANSI Z223.1. When re-sizing any
portion of the common venting system, the com­mon venting system should be re-sized to
approach the minimum size as determined using
the appropriate tables in Part 11 of the National
Fuel Gas Code, ANSI Z223.1.

For special venting applications that require reduced
vent sizes and through-the-wall venting, the Type D
Induced Draft Assembly can be used. Consult the
factory or your local Raypak representative.

Fig. # 8182.0

WARNING: Do not use thermally actuated vent dampers on modulating heater. To do so, may result in
asphyxiation. Use only a mechanically actuated vent damper device that is electrically interlocked with the
modulating heater operation.

MOUNTING

On vertical vents, the vent damper may be mounted with the actuator in any position. On horizontal vents,
do not mount the actuator either directly above or directly below the vent pipe; mount the vent damper actuator
to the side of the vent.

The vent damper is set up for a continuous pilot system. If the vent damper is installed on an Intermittent
Pilot or Direct Spark Ignition equipped system, the energy savings of the vent damper can be improved by
plugging the hole in the vent damper blade using the knockout plug, Part No. 105612R, provided in the parts
envelope.

DO NOT plug the hole if installing the vent damper on a continuous pilot system as this will create a hazardous
condition.

15

HEATER

D808

VERTICAL

INSTALLATION

HORIZONTAL INSTALLATION

FLOW >

D808

TO CHIMNEYTO BOILER

TO CHIMNEY

D808

HEATER

TO BOILER

NO

YES

NO

INSTALL VENT
DAMPER WITH
ACTUATOR TO
SIDES OF VENT
ONLY. DO NOT
MOUNT ABOVE OR
BELOW VENT.

ACTUATOR MAY BE
INSTALLED IN ANY
POSITION ON
VERTICAL PIPE.

YES

N.O. N.C.

End
Switch

C.

1K3

12345

Black Orange Red

1

Power supply provide disconnect me ans an overload protection as requ ired.

Power supply provide disconnect means an overload protection as required.

1K2

Motor

1R

Thermostat or
Controller

Dual Valve
Combination Gas
Control or
Ignition System

1K1

R

Yellow Blue

Transformer

Optional Limit
LocationLimit

(Hot)

L1

L2

1

Fig. # 8183.0

Fig. # 8615.0

INSTALLING THE VENT DAMPER VENT DAMPER GENERAL WIRING DIAGRAM

INSTALL THE VENT DAMPER TO SERVICE ONLY THE SINGLE APPLIANCE FOR WHICH IT IS INTENDED.
IF IMPROPERLY INSTALLED, A HAZARDOUS CONDITION, SUCH AS AN EXPLOSION OR CARBON
MONOXIDE POISONING, COULD RESULT.

VENT DAMPER

2. Turn the thermostat or controller up to call for heat
and check that the vent damper indicator points to

For safe, efficient operation, the vent damper and
all flue product carrying areas of the appliance must be
checked annually, with particular attention given to
deterioration from corrosion or other sources. Check
vent damper operation as follows:

the open position, Fig. 4.

3. Turn the thermostat or controller down again and
check that the vent damper position indicator
returns to the closed position.
THE VENT DAMPER MUST BE INSPECTED AT

LEAST ONCE A YEAR BY A TRAINED,

1. When the heater is off, check that the vent
damper position indicator points to the closed
position, Fig. 4.

EXPERIENCED SERVICE TECHNICIAN. THE
NAME OF THE PERSON WHO ORIGINALLY
INSTALLED YOUR VENT DAMPER IS SHOWN ON
THE INSTALLATION LABEL. DAMPER MUST BE IN

THE OPEN POSITION WHEN HEATER MAIN
BURNERS ARE OPERATING.

Damper
Position
Indicator

Damper
Position
Indicator

Fig. # 8181.0

DAMPER OPEN DAMPER CLOSED

FIG. 4 - VENT DAMPER POSITON INDICATOR SHOWING OPEN & CLOSED POSITIONS.

16

PLUMBING

GENERAL

Heater should be located so that any water leaks
will not cause damage to any adjacent areas or struc­tures.

GAS SUPPLY CONNECTIONS

Gas piping must have a sediment trap ahead of the
heater gas controls, and a manual shut-off valve
located outside the heater jacket. All gas piping should
be tested after installation in accordance with local
codes.

CAUTION: The heater and its manual shut-off valve
must be disconnected from the gas supply during any
pressure testing of that system at test pressures in
excess of 1/2 PSI. Dissipate test pressure in the gas
supply line before reconnecting the heater and its
manual shut-off valve to gas supply line. FAILURE TO
FOLLOW THIS PROCEDURE MAY DAMAGE THE
GAS VALVE. OVER-PRESSURED GAS VALVES
ARE NOT COVERED BY WARRANTY. The heater
and its gas connections shall be leak tested before
placing the appliance in operation. Use soapy water
for leak test. DO NOT use open flame.

NOTE: Do not use Teflon tape on gas line pipe thread.
A flexible sealant is recommended.

Fig. # 8090.1

17

A minimum of 7" WC and a maximum of 14" WC upstream pressure under load, and no load conditions must

be provided for natural gas or a minimum of 12" WC and a maximum of 14" for propane.

* Models 181, 261, 331, and 401 are Low NOx units and are not available in propane.

GAS PRESSURE REGULATOR

The gas pressure regulator located in the gas valve is preset nominally at 4" WC for natural gas, and 11" WC
for propane. Between the gas valve and the burners is a 1/8" pipe plug. The pressure at this point, taken with
a manometer, should be about 3.7" WC natural gas and 10.5" WC propane. Models 181, 261, 331, and 401
should be 3.9 wc natural gas. If an adjustment is needed, turn adjustment screw clockwise to increase pressure,
or counter-clockwise to decrease pressure.

VENTING OF DIAPHRAGM GAS COMPONENTS

Gas train components that have diaphragms in their construction are supplied with a bleed line connection
that must be connected to the outside atmosphere as required by the National Fuel Gas Code. Under NO
circumstances shall bleed lines terminate in the gas utilization equipment flue or exhaust system.

18

Fig # 8185.2

FLOW RATES

19

PIPING - DOMESTIC HOT WATER SUPPLY HEATERS

GENERAL SPECIFICATIONS

UNI-TEMP 80 HOT WATER SUPPLY SYSTEMS

T = Temperature Rise, Degree F@GPM FLOW
GPM = Gallons per Minute Flow
P = Pressure Drop, Foot thru Heat Exchanger

MPS = Minimum Pipe Size, NPT
SHL = System Head Loss

The table above provides data for selecting in-line pumps for use in a Uni-Temp 80 system for a single heater
and tank according to the following:

1. Flow rates are based on water hardness as measured in grains per gallon.

Soft: 0-4 grains per gallon.
Medium: 5-15 grains per gallon.
Hard: 16 and over grains per gallon.

2. Maximum Flow Rates:

133 22 GPM
181-401 45 GPM
514-1826 90 GPM
2100-4001 200 GPM

3. Pressure drop values ( P and SHL) and minimum pipe sizes are for two-pass heaters.

4. Sizing based on heater and tank being placed 5 feet apart. The equivalent length of pipe

valves and fittings in the system is as follows:

1-1/2" NPT = 70 Ft (181-401) 2-1/2" NPT = 80 Ft (926-1826)
2" NPT = 75 Ft (514-824) 3" NPT = 85 Ft (2100-4001)

Additional pipe fittings will increase the system head loss.

5. Select a pump based on the water hardness, flow, and system head loss.

6. If heater is more than two stories above the tank, consult the factory.

NOTE:

GPM flow rates are limited by maximum acceptable velocity through heat exchanger tubes. Heater models 514
through 1826 may be provided with an integral rear-mounted pump. This must be specified at time of order. The

integral pump will provide sufficient flow to meet the conditions listed in the table.

20

PIPING DIAGRAMS

TYPE WH - UNITEMP 80 SYSTEM

21

TYPE NH - INSTANTANEOUS

Type NH heaters provide instant hot water without a tank and are used in applications where scaling is
prevalent and where hot water demand is fairly constant throughout the day, such as apartments, hotels, motels
and industrial applications. The Type NH heater should not be used on apartments and hotels with fewer than
30 dwelling units, nor should the heater be sized smaller than a 514.

Use a minimum 20' of 3" pipe on outlet.

22

TYPE NH - DUAL MODELS 514-1826

1. Estimate total length of supply and return loop.
Refer to table.

2. If multiple loops are used:
(A) Use multiple pumps and size return pipes

according to table; or

(B) Use one larger recirculating pump with

balancing valves on each return line.

3. First fixture on supply line must be a minimum
of 20 feet from the heater.

4. Supply line size must be 2" minimum. If not
possible, add a tank between heater and first
fixture.

MINIMUM INPUT ADJUSTMENT

Model Types NH and WH have minimum input ratings as specified on their individual rating plates. Minimum
input controllers have been pre-set at the factory. Consult with factory representatives if a minimum input
problem should occur.

23

CONTROLS - GENERAL

RELIEF VALVE

A new combination temperature and pressure

(T&P) relief valve, complying with the Standard for
Relief Valves and Automatic Gas Shut-Off Devices for
Hot Water Supply Systems, ANSI Z21.22, must be
installed in the opening provided on top of the storage
tank at the time of installation. No valve is to be placed
between the relief valve and the storage tank.

The pressure rating of the relief valve must not

exceed the 160 maximum working pressure indicated
on the water heater rating plate. The BTUH rating of the
relief valve must not be less than the BTUH input of the
heater.

Connect the outlet of the relief valve to a suitable

open drain. The discharge line must pitch downward
from the valve to allow complete draining (by gravity) of
the relief valve and discharge line. The discharge line
should be no smaller than the outlet of the valve. The
end of the discharge line should not be threaded or
concealed, and should be protected from freezing. No
valve of any type, restriction or reducer coupling,
should be installed in the discharge line. Local codes
shall govern installation of the relief valve.

ECONOMASTER CONTROL

The Economaster II is an electronic device that

allows the operator to set the desired time for the pump
to run after the heater shuts off. The time is factory-set
at 7 minutes and it can be re-adjusted in the field
anywhere from 3 to 10 minutes.

In a conventional system, when the aquastat is

satisfied, the main gas valve closes, but the pump
continues operating. With the energy-conserving
Economaster II, the heater pump is programmed to
continue running for an optimum period of time in order
to absorb the residual heat from the combustion cham­ber and use it in the system. The pump then shuts off
until the next call for heat is received from the aquastat.

ELECTRONIC IGNITION

The intermittent ignition device conserves energy
by automatically extinguishing the pilot when desired
temperature is reached. When additional heat is
needed, the pilot re-ignites electrically, eliminating the
fuel costs of maintaining a constant pilot. To assure
safe operation, the gas valve cannot open until the pilot
relights and is confirmed.

OPERATING CONTROLS

On models 514-1826, models with mechanical
modulating controls have one or more Robertshaw
Unitrol 7000 Series hydraulic snap on thermostatic
combination gas valves. These valves have the pres­sure regulator and 24-volt operator built-in. The hy­draulic actuator will throttle the heater input to adjust the
firing rate and meet the required load. This, in effect,
prevents costly fuel consumption, as compared to an
on-off cycling heater. The valve has a remote capillary
bulb immersed in a well, at the header outlet, to main­tain a constant outlet water temperature. When mul­tiple valves are furnished, they can be staged to give
greater flexibility of control. Standard factory setting is
at position 5. Consult the dial setting tag attached to the
control for your desired temperature. See chart below.

NOTE: Pump will come on when power is first applied

to the heater.

Fig# 9331

Fig # 9330.1

24

MECHANICAL MODULATING VALVE LOCATION

MODELS 0724-1336

Fig # 9332

MOTORIZED GAS VALVE LOCATION

MODEL 3001

LIMIT CONTROLS
HIGH LIMIT

The heater is equipped with a manual reset High
Limit. Push the reset button and set the limit(s) to
30 °F - 40 °F above desired operating temperature.
Maximum setting is 210 °F.

FLOW SWITCH

This dual-purpose control shuts off the heater in
case of pump failure or low water condition and is
strongly recommended. It is mounted and wired in
series to the main gas valve.
NOTE: The flow switch is a safety device and not a
control. Do not operate the heater with flows less than
the minimums stated in this manual.

100% PILOT SAFETY

Models 514-4001 employ electronic devices which
close the main gas valve within 8/10 of a second

Fig # 9333.1

whenever the pilot flame is interrupted. Pilot flame is
automatically lit when the device is powered. Unit
performs its own safety check and opens the main
valve only after the pilot is proven to be lit.

LOW WATER CUT-OFF (OPTIONAL)

The low water cut-off automatically shuts down
burner whenever water level drops below probe. 90­second time delay prevents premature lockout due to
temporary conditions such as power failure or air
pockets. Flush float type devices at beginning of each
heating season.

HIGH AND LOW GAS PRESSURE
SWITCHES (OPTIONAL)

These switches sense either high or low gas pres­sures and automatically shut down burners if abnormal
pressures exist.

25

COMPONENT IDENTIFICATION

Fig# 9314

MANUAL RESET HIGH LIMIT THERMOSTAT CONTROL

Fig# 8929.1

IGNITION CONTROL MODULE

Fig# 8643

Fig# 9312

HIGH and/or LOW

GAS PRESSURE SWITCH

Fig# 9316

Fig# 9317

Fig# 8995

LOW WATER CUT-OFF MECHANICAL MODULATING VALVE

Fig# 8925

FLOW SWITCH FLOW SWITCH PADDLE CUTTING GUIDE

26

ELECTRICAL CONNECTIONS

CAUTION: Label all wires prior to disconnection when

servicing controls. Wiring errors can cause improper
and dangerous operation. Verify proper operation after
servicing.

DANGER - SHOCK HAZARD

Make sure electrical power to the heater is discon­nected to avoid potential serious injury or damage to
components.

The heater is normally wired for 120 Volts. The
voltage is indicated on the tie-in leads. Consult the
wiring diagram shipped with the heater in the instruc­tion packet. The "TH" leads are for the remote tank

control connection. 24 Volts are supplied to this con­nection through the heater transformer. DO NOT
attach line voltage to the "TH" leads on models 514-

1826. Before starting heater check to ensure proper
voltage to heater and pump.

Heater must be electrically grounded in accor-

dance with National Electrical Code ANSI/NFPA No

70.

NOTES:

1. Field install ground wire to inside of junction box.

2. If any of the original wire supplied with the heater
must be replaced, it must be replaced with 105°C
wire or its equivalent.

Fig # 9138.2 Fig # 9138.1

SINGLE-STAGE TANKSTAT 2- STAGE TANKSTAT

(2 ON/OFF UNITS)

27

LOCATION OF CONTROLS

400
WH1, WH2, WH3

181 (LOW NOx)
WH1

Fig # 9360

28

LOCATION OF CONTROLS

29

Fig. #9334

LOCATION OF CONTROLS

START-UP PROCEDURES
BEFORE START-UP

Safe lighting and other performance criteria were
met with the gas manifold and control assembly pro­vided on the heater when the heater underwent tests
specified in the latest edition of the ANSI-Z21.10.3
Standard.

GENERAL

Before lighting up a new installation, water should
be flowing through the heater.

Water pressure regulator should be set to mini­mum 25 PSI.

Fig # 9335

INITIAL START-UP - PUMP AND MOTOR

Many pumps are now direct-drive. They have no
coupler or bearing assembly. These pumps do not
require lubrication. Others require SAE-30 non-deter­gent oil to lubricate both the motor and the bearing
assembly. Check pump motor for type before adding
oil.

Clean dust and lint from pump and motor. Check
pump coupler and tighten if necessary.

Flush system before putting into operation to en­sure that foreign material does not damage pump
seals.

CAUTION:

Propane is heavier than air and sinks to the
ground. Exercise extreme care in lighting heater in
confined areas.

CAUTION:

A. Pump must be off to check oil in bearing assembly.
B. Do not run pump without water in system.

30

General Safety Precautions

To meet commercial water use needs, the thermostat

on this water heater is adjustable up to 190°F. How-

ever, water temperatures over 125 °F can cause in-

stant severe burns or death from scalds. This is the

preferred temperature setting when supplying general

purpose hot water.

Safety and energy conservation are factors to be

considered when setting the water temperature on the

thermostat. The most energy-efficient operation will

result when the temperature setting is the lowest that

satisfies the needs consistent with the application.

The following chart details the relationship of water
temperature and time with regard to scald injury and
may be used as a guide in determining the safest water
temperature for your applications.

Temperature Time to Produce Serious Burn

120°F More than 5 minutes
125°F 1-1/2 to 2 minutes
130°F About 30 seconds
135°F About 10 Seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1-1/2 seconds
155°F About 1 second

Table courtesy of Shriners Burn Institute

TIME/TEMPERATURE RELATIONSHIPS IN
SCALDS

The temperature of the water in the heater can be
regulated by setting the temperature dial on the front of
the thermostat. To comply with safety regulations, the
thermostat was set at its lowest setting before the
heater was shipped from the factory. The illustration
below shows how to adjust the water temperature
using the thermostat.

Water temperature over 125°F can
cause instant severe burns or death
from scalds.

Children, disabled, and elderly are
at highest risk of being scalded.

See instruction manual before set­ting temperature at water heater.

Feel water before bathing or show­ering.

Temperature limiting valves are
available, see manual.

Maximum water temperatures occur just after burner

has shut-off. To determine the water temperature

being delivered, turn on the hot water only, place a

thermometer in the stream, and read the thermom-

eter.

To adjust the water tem­perature, insert a small
straight screwdriver into
slotted screw in hole in front
of thermostat and turn
wheel to desired setting.
Thermostat is adjustable
up to 190°F.

CAUTION!! - Hotter water
increases the risk of
SCALDING!

There is a hot water scald potential if the thermostat is
set too high.

NOTE: When this heater is supplying general purpose
hot water requirements for use by individuals, a ther­mostatically controlled mixing valve for reducing point
of use water temperature is recommended to reduce
the risk of scald injury. Contact a licensed plumber or
the local plumbing authority for further information.

31

LIGHTING INSTRUCTIONS FOR HEATERS WITH ELECTRONIC IGNITION (IID)

FOR MODELS WITH MANUAL GAS VALVES

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING:If you do not follow these instructions exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.

A. This appliance is equipped with an ignition device
which automatically lights the pilot. Do not try to light the
pilot by hand.

B. BEFORE OPERATING smell all around the appliance

area for gas. Be sure to smell next to the floor because
some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS
* Do not try to light any appliance.
* Do not touch any electric switch.
* Do not use any phone in your building.
* Immediately call your gas supplier from your

neighbor’s phone. Follow the gas supplier’s instruc-

tions.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above.

2. Set the thermostat on the lowest setting.

3. Turn off all electric power to the appliance.

4. This appliance is equipped with an ignition device which

automatically lights the pilot. Do not try to light the pilot
by hand.

5. Remove heater door panel.

6. For Robertshaw gas valve: Turn gas control knob

clockwise to “OFF”.
For Honeywell Gas Valve: Turn gas control knob clock­wise to “OFF". Make sure knob rests against stop.
For Honeywell Gas Valve: (Model 400 only)
Push in gas control knob slightly and turn clockwise
to “OFF”. Knob cannot be turned to “OFF”
unless knob is pushed in slightly. Do not force.

7. Wait five (5) minutes to clear out any gas. Then smell for

gas, including near the floor. If you smell gas, STOP!
Follow “B” in the safety information previously stated. If
you do not smell gas, go to the next step.

8. For Robertshaw Gas Valve: Turn gas control knob

counter-clockwise to “ON”.

ROBERT SHAW
GAS CONTROL
KNOB SHOWN
IN "ON" POSITION

* If you cannot reach your gas supplier, call the fire de-

partment.

C. Use only your hand to push in or turn the gas control

knob. Never use tools. If the knob will not push in or turn
by hand, do not try to repair it. Call a qualified service
technician. Force or attempted repair may result in a fire
or explosion.

D. Do not use this appliance if any part has been under

water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.

For Honeywell Gas Valve: Turn gas control knob counter­clockwise from “OFF” until it stops. Push in gas control
knob and continue rotating counter-clockwise to “ON”
position. Make sure knob rests against stop.

HONEYWELL
GAS CONTROL
KNOB SHOWN
IN "ON" POSITION

GAS INLET

Fig. # 8082

9. Replace heater door panel.

10. Turn on all electric power to the appliance.

11. Set thermostat to desired setting.

12. If the appliance will not operate, follow the instructions
“To Turn Off Gas To Appliance” and call your service
technician or gas supplier.

GAS INLET

Fig. # 8080

TO TURN OFF GAS TO APPLIANCE

1. Set the thermostat to the lowest setting.

2. Turn off all the electric power to the appliance if service
is to be performed.

3. Remove door panel.

4. For Robertshaw Gas Valve: Turn gas control knob
clockwise to “OFF”.

For Honeywell Gas Valve: Turn gas control knob clock­wise to “OFF”. Make sure knob rests against
stop.

5. Replace heater door panel.

32

FOR MODELS WITH AUTOMATIC GAS VALVES

1. Close all gas valves. Turn off electric power
supply. Wait five (5) minutes.

2. Open manual pilot valve. Turn on electric
power. Pilot is automatically lighted.

PILOT SHUT-OFF
VALVE CONTROL
SHOWN IN "ON"
POSITION

3. Open main gas valve.

4. Set temperature controls to desired temperature.

TO SHUT DOWN

Close all manual gas valves. Turn off electric

power.

GAS INLET

AFTER START-UP

INTERMITTENT PILOT SYSTEM CHECKOUT PROCEDURE (S8600)

1. Turn on power to the ignition systems and turn
gas supply off.

2. Check ignition module as follows:
a. Set the thermostat or controller above

room temperature to call for heat.

b. Watch for continuous spark at the pilot

burner.

c. Time the spark operation. Time must be

within the lockout timing period (15 or 90
seconds).

d. Turn thermostat down to end call for heat

and wait 60 seconds on lockout models
before beginning step 3.

3. Turn on gas supply.

4. Set thermostat or controller above room temp­erature to call for heat.

5. Systems should start as follows:
a. Spark will turn on and pilot gas valve will

open at once. Pilot burner should ignite
after gas reaches the pilot burner.

b. Spark ignition should cut-off when pilot

flame is established.

c. Main gas valve should open and main

burner should ignite after gas reaches the
burner port.

Fig# 8220

TO PILOT

MAIN GAS
SHUT-OFF
VALVE
SHOWN IN
THE "ON"
POSITION

INSPECTION PROCEDURES
BURNERS

Clean main burners and air louvers free of dust, lint
and debris. Keep heater area clear and free from
combustibles and flammable liquids. Do not obstruct
the flow of combustion and ventilation air. Make visual
check of burner and pilot flame. Yellow flame indicates
clogging of air openings. Lifting or blowing flame indi­cates excessively high gas pressure. Low flame indi­cates low gas pressure.

Fig# 8144

TYPICAL MAIN BURNER FLAME (Atmospheric models)

NOTE: Modulating burner flame varies in height from
approximately 1/4" at low fire to approximately 4" at
high fire.

CONTROLS

Check all controls to see that they are operational.
To check electronic safety (IID models), turn off main
burner. Observe pilot burner when shutting off pilot
gas. Ignition spark should go on. Main gas valve will
also drop out.

High Limit Switch - to check high limit switch, turn
dial setting down to a point slightly below the tempera­ture of the water leaving the heater. The reset button
should snap out and the burner should shut-off. Reset
dial to 30°F to 40°F above desired operating tempera­ture and push reset button. Burner should light.

33

INSPECTION PROCEDURES

Inspect on the first and third month after initial start­up and then on an annual basis. If problems are found,
refer to the Troubleshooting sections of this manual for
additional directions.

1. Remove top of heater and inspect heat exchanger

for soot and examine venting system.

2. Remove rear header and inspect for scale depos-

its.
*3. Inspect pilot and main burner flame and firing rate.
*4. Inspect and operate all controls and gas valve.
*5. Visually inspect system for water leaks.
*6. a. Oil pump motor and bearing assembly,

if oil

cups are provided.

b. Disconnect pump from header and check

condition of pump impeller. Check condition of
bearing by attempting to move impeller from
side to side. Replace any parts showing wear.

c. Check pump coupler for wear and vibration.

7. Check flow switch paddle.

8. Clean room air intake openings to assure
adequate flow of combustion and ventilation air.

CAUTION: Combustion air must not be contaminated
by corrosive chemical fumes which can damage the
heater and void the warranty.

9. Keep heater area clear and free from combustible
materials, gasoline, and other flammable vapors
and liquids.

*Should be checked monthly.

(Takes approximately 15 minutes).

PILOT BURNER FLAME-IID

(atmospheric units)

Fig# 9336

34

ADDENDA: LOW NOx HEATERS Models 181 to 401

The Raytherm Low NOx Heater is offered with WH1­On-Off firing (standard) or 2-stage firing (optional).

The heaters are certified and tested under the latest
edition of the ANSI Z21.10.3 standard for hot water
heaters.

The heater should be installed to meet all local codes,
the National Fuel Gas Code ANSI Z223.1, and the
National Electrical Code, ANSI/NFPA 70-latest edition.

3.Turn on gas supply.

4.Set controller to call for heat.

5.System should start as follows:

a.Spark will turn on and pilot gas valve will open and

the blower will begin running.

b.Heater will operate until call for heat is satisfied.

BURNER ADJUSTMENT

This burner assembly does not require any primary air
adjustments.

VISUAL INSPECTION

Flame can be observed through the slot opening above
the plenum. Flame color is blue and evenly spread on
the top surface of the burner. A visual inspection
should be made monthly of the burners. In case flame
lifting is observed on the burner, check gas pressure on
manifold and static pressure in plenum. Gas pressure
in manifold should be 3.9" WC and static pressure in
plenum should be greater than 0.5" WC

Fig # 9361

OPERATION

On call for heat, the ignition system, consisting of an
electronic spark module, gas pilot system is energized.
Providing pilot is proven, blower will start running, the
main gas valve will open and the heater will operate.
When the operating control is satisfied, the heater will
shut down.

START-UP PROCEDURES

(S8610B Ignition Module)

1.Turn on power to the heater with gas supply off.

2. Check ignition module as follows:
a.Set the thermostat or controller to call for heat.
b.Watch for continuous spark at the pilot burner.
c. Check the ignition spark operation. Time must be

within the lockout timing period (15 or 90 seconds).

d.Turn control down to end call for heat and wait 60

seconds on lockout models before beginning step

3.

ELECTRICAL

Be sure that electrical service to the heater has proper
overload fuse or circuit breaker protection, and wire
size and connections comply with all applicable codes.

HIGH GAS PRESSURE SWITCH

Pressure switch senses high pressure and automati­cally shuts down burner if abnormal pressure exists.

PRESSURE
SWITCH

GAS MANIFOLD

Fig. #8236.0

35

ADDENDA: LOW NOx HEATERS Models 181 to 401 (CONTINUED)

sembly from the burner tray assembly.

4. Use a long ½” socket wrench to remove orifices
from the gas manifold.

5. Remove burners by raising the bracket on the back
end of the burners up and out of their slots.

6. Reverse above procedure to re-install.

Fig # 9362

LOW NOx BURNER TRAY ASSEMBLY

BURNER TRA Y REMOV AL

Fig # 9363

1. Shut-off main electrical power switch to heater.

2. Shut-off gas upstream of heater.

3. Remove front door.

4. Disconnect gas line from gas valve.

5. Remove (2) screws that mount burner tray to unit,
and (4) screws that secure gas valve to jacket.

6. Disconnect wires that terminate at gas valve.

7. Unscrew (4) screws that secure the control box.

8. Disconnect pilot wire from the ignition module.

9. Disconnect wire harness from the combustion
blower.

10. Carefully slide out the burner tray assembly.

11. Reverse above procedure to reinstall.

GAS V ALVE REMOVAL

1. Shut-off main electrical power switch to heater.

2. Shut-off gas supply to the heater.

3. Remove front door.

4. Disconnect gas line from gas valve.

5. Disconnect wires, pilot tubing and bleed line,
if required.

6. Remove (2) screws that secure gas valve to
jacket.

7. Turn vertical gas pipe from manifold slightly
and unscrew gas valve.

8. Reverse above procedure to re-install.

IID PILOT

PILOT REMOV AL

1. Disconnect pilot tubing from gas valve.

2. Remove (4) screws from control box. Open the
control box.

3. Remove the pilot wire from the ignition wire.

4. Remove (2) screws that mount the pilot bracket
to the air manifold assembly.

5. Pull the pilot bracket downwards and outwards.

6. Reverse above procedure to re-install.

COMBUSTION FAN REMOVAL

1. Remove burner tray. (See Burner Tray
Removal procedure above.)

2. Remove (4) screws the mount the combustion
blower to the manifold assembly.

3. Reverse above procedure to re-install.

MAIN BURNER AND ORIFICE REMOVAL

1. Remove burner tray. (See Burner Tray Removal
procedure above.)

2. Remove (8) screws from the hold-down brackets.

3. Remove (8) screws from the left and right sides of
the manifold assembly. Detach the manifold as-

36

TROUBLESHOOTING - ELECTRICAL

(ELECTRONIC IGNITION IID)

Intermittent Pilot System

HONEYWELL S8600

WARNING

HIGH VOLTAGE

For qualified Technicians ONLY

NOTE: Some heaters may be equipped with
an ignition module that shuts off pilot gas if
pilot fails to light. To reset, interrupt power
to heater.

START

TURN GAS SUPPLY OFF.

TURN THERMOSTAT

(CONTROLLER) TO CALL

FOR HEAT

POWER TO MODULE

(24 V NOMINAL)?

YES

SPARK ACROSS

IGNITER/SENSOR GAP?

YES

TURN GAS SUPPLY ON

PILOT BURNER LIGHTS?

YES

SPARK STOPS WHEN

PILOT IS LIT?

YES

NO

NO

NO

NO

NOTE: Before troubleshooting, familiarize yourself with the start-up and checkout
procedure.

Check line voltage power, low voltage transformer, limit controller, thermostat
(controller) and wiring.

Pull ignition lead and check spark at module.
If spark is okay:

• Check ignition cable, ground wiring, ceramic insulator and gap, and correct.

• Check boot of the ignition cable for signs of melting or buckling. Take protective
action to shield cable and boot from excessive temperatures.
If not, replace module.

• Check that all manual gas valves are open, supply tubing and pressures are good,
and pilot burner orifice is not blocked.

• Check electrical connections between module and pilot operator on gas control.

• Check for 24 Vac across PV-MV/PV terminals on module. If voltage is
okay, replace gas control; if not, replace module.

NOTE: If S8600H goes into lockout, reset system. Lockout is used on propane
models.

• Check continuity of ignition cable and ground wire.

• Clean flame rod.

• Check electrical connections between flame rod and module.

• Check for cracked ceramic flame rod insulator.

• Check that pilot flame covers flame rod and is steady and blue.

• Adjust pilot flame.

• If problem persists, replace module.

MAIN BURNER LIGHTS?

YES

SYSTEM RUNS UNTIL

CALL FOR HEAT ENDS?

YES

CALL FOR HEAT ENDS

SYSTEM SHUTS OFF?

YES

TROUBLESHOOTING ENDS

NO

NO

NO

• Check for 24 Vac across MV-MV/PV terminals. If no voltage, replace module.

• Check electrical connections between module and gas control. If okay, replace
gas valve or gas control operator, i.e. pilot gas valve, flow switch etc.

NOTE: IF S8600H goes into lockout, reset system.

• Check continuity of ignition cable and ground wire.
NOTE: If ground is poor or erratic, shutdowns may occur occasionally even though

operation is normal at the time of checkout.

• Check that pilot flame covers flame rod and is steady and blue.

• If checks are okay, replace module.

• Check for proper thermostat (controller) operation.

• Remove MILLIVOLT lead at module; if valve closes, recheck temperature
controller and wiring; if not, replace gas valve.

37

WIRING DIAGRAMS
WIRING DIAGRAM - WH2 182/260

38

WIRING DIAGRAM - WH2 330/400

39

WIRING DIAGRAM - WH2 514/624

40

WIRING DIAGRAM - WH2 724-1336

41

WIRING DIAGRAM - WH2 1414-1826

42

WIRING DIAGRAM - WH2 2100-2500

43

WIRING DIAGRAM - WH2 3001-4001

44

WIRING DIAGRAM - WH1 181/261 LOW NOx

45

WIRING DIAGRAM - WH1 331/401 LOW NOx

46

TROUBLESHOOTING

MECHANICAL PROBLEM

POSSIBLE CAUSE

CORRECTIVE ACTION

When heater is turned on nothing
happens.

Thermostat in "ON" position causes
relay and pump to operate, but
heater does not fire.

Continuous shut down of manual
reset High Limit.

No power to the heater………………….
Bad transformer………………………….

Inoperative thermostat…………………..
Inoperative toggle switch………………..
Inoperative relay………………………….

Main gas valve closed………………......

Plugged bleed line on gas valve or
gas pressure regulator…………………..
Broken pump coupler……………………

Shutdown by low water cut-off,
caused by air……………………………..
Gas valve defective……………………..

Temperature setting too low…………….
Low water flow……………………………
Interrupted pump operation……………..
Modulating control set too high………..
Mechanical modulating control…………

Check the circuit breaker, outdoor con­troller, etc., upstream of heater.
If power to Leads L1 and L2 of trans­former, but no power on 24V side, re­place.
Jumper thermostat, replace with new if
heater fires.
If power to toggle switch, but not through
switch, replace.
If power to relay, but not operating, re­place.

Open valve.
Loosen bleed line and clean.

Replace coupler. Inspect bearing as­sembly, and if frozen, lubricate or re­place.

Bleed air from system.
Check for power to gas valve. If valve has
power but will not open, check vent tube
for blockage. If clear, replace valve.

Reset High Limit to higher temperature.
Check system water pumps.
Check pump oil if necessary.
Reset modulator to a lower setting.
Check and replace if necessary.

Sooting
CAUTION-Soot may be combus­tible. Wet down and exercise
caution when cleaning.

Continuous shut down of low water
cut-off or flow switch.

Low flame.

Outer jacket very hot

(blistered paint)

Air starvation……………………………..
Condensation…………………………….

Toxic fumes which cause a chemical
reaction with copper tubes or destroy
combustion……………………………….

Improper venting…………………………

Insufficient system flow………………….
Low water due to leaking………………..
Air in system……………………………...

Line strainer dirty…………………………
Lime in Heat Exchanger…………………

Low gas supply…………………………..

Insects or debris clogging……………….
Burner intake ports low gas pressure….
Venting or combustion air……………….

Broken refractory…..…………………….

Refer to installation instructions regard­ing combustion air requirements.
Set bypass valve to prevent heater inlet
temperature from dropping below 105° F.

Remove all sources of fumes, such as
freon or chloride, or isolate the heater.
Follow recommended vent installation
instructions.

Check pumps and piping.
Inspect for leaking and repair.
Inspect for leakage and repair. Install an
automatic air vent.
Clean.
Ream tubes.

Debris in gas line (pipe dope, rocks, etc.).
Gas line too small.
Improper size gas meter.
Gas regulator adjustment.
Clean burners.
Adjust gas pressure.
Refer to installation instructions regard­ing combustion air requirement.

Replace refractory panels.

Combustion fan not running.
(If applicable)

Fan relay................................................

Fan.........................................................

47

Replace fan relay.
Loose wire connection.
Failed fan motor.

TROUBLESHOOTING - PUMPS

FAILURE TO PUMP

1. Pump not properly primed.

2. Wrong direction of rotation.

3. Speed too low.

4. Total head too high.

REDUCED CAPACITY AND/OR HEAD

1. Air pockets or leaks in suction line.

2. Clogged impeller.

3. Foot valve strainer too small or clogged.

4. Excessive suction lift (over 15 feet).

5. Insufficient positive suction head (for hot water).

6. Total head more than that for which pump is
intended.

7. Excessively worn impeller and wearing rings.

RAPIDWEAR OF COUPLING

1. Misalignment or a bent shaft.

2. Sagging motor mounts (over-oiling).

PUMP LOSES PRIME

1. Air leaks in suction line.

2. Excess air in water.

3. Water seal in stuffing box not functioning.

4. Excessive suction lift and pump operating too

OVERLOADED DRIVING UNIT

1. Head much lower than that for which pump is

2. Speed too high or higher than that contem-

MECHANICAL TROUBLES AND NOISE

1. Misalignment.

2. Excessive suction lift or vapor binding (hot

3. Bent shaft and/or damaged bearings.

4. Suction and discharge piping not properly

SERVICE AND MAINTENANCE PROCEDURES

near shut-off point.

designed.
plated.

water).

supported and anchored.

RAYPAK TUBE CLEANING KIT

Extension Pieces (5) Auger with Carbide Tip Wire Brush

TUBE CLEANING

Establish a regular inspection schedule, the frequency
depending on the local water condition and severity of
service. Do not let the tubes clog up solidly. Clean out
deposits over 1/16" in thickness.

The heater may be cleaned from the side opposite

the water connections as shown, without breaking pipe
connections. It is preferable, however, to remove both

Fig. # 8154

headers for better visibility through the tubes and to be
sure the residue does not get into the system.

Note that you do not remove the top pan or the

heat exchanger generally.

After reaming with the auger, mount the wire brush

and clean out the debris remaining in the tubes.

Another method is to remove the heat exchanger,
ream tubes and immerse heat exchanger in non­inhibited de-scale solvent.

48

BURNER ORIFICES

COMBINATION FLAME SENSOR/
IGNITOR AND PILOT BURNER LOCATION

BURNERS

TYPICAL BURNER TRAY ILLUSTRATED

BURNER TRAY REMOVAL

1. Shut-off power and gas supply to the heater.
Disconnect union(s) and pilot tubing, then
loosen and remove burner hold-down screws.

2. Disconnect wires at gas valve and slide burner
drawer out.

GAS VALVE REMOVAL

1. Shut-off gas supply to the heater. Remove gas
piping to gas valve inlet.

2. Disconnect wires, pilot tubing and bleed line, if
required.

3. Turn vertical gas pipe from manifold slightly and
unscrew gas valve.

4. Reverse above procedure to re-install.

MAIN BURNER AND ORIFICE REMOVAL

1. Remove screws and burner hold-down bracket.

BURNER HOLD-DOWN LOCATION

PILOT REMOVAL AND CLEANING

1. Disconnect pilot tubing at pilot and sensor/igniter
wire. Remove screws holding pilot bracket to
burner tray.

2. Remove pilot and bracket, clean pilot of debris,
small bugs, etc., with wire or small brush.

3. Replace pilot, pilot tubing, sensor ignition wires
and check for leaks.

HIGH LIMIT OR TANKSTAT REMOVAL

1. Turn off electrical power.

2. Remove front inspection panel.

3. Remove wires to high limit and loosen screws
holding high limit to cabinet.

4. Remove wedge clip holding sensing bulb in
control well.

5. Remove high limit and install a new one.

6. Check control operation before leaving job.

NOTE: If the heat exchanger is sooted badly, the
burner hold-down bracket and spacer can become
distorted from direct flame impingement and this usu­ally necessitates replacement of these parts.

2. Lift burners from slotted spacer and slide from
orifices. Clean with a wire brush.

3. Orifices usually do not need to be replaced.
To clean, run either copper wire or wood
through orifice. Do not enlarge hole. To
remove orifice, use a socket wrench and
remove the manifold. DO NOT overtighten
when reinstalling.

HEAT EXCHANGER REMOVAL

1. Shut water, gas and electricity off, close valves
and relieve pressure, remove relief valve.

2. Remove side inspection panels.

3. Remove top holding screws.

4. Remove draft diverter, lift and remove top and
flue collector on stack type models. Remove
inspection panels.

5. Loosen bolts and disconnect flange nuts on
in/out header, loosen union (s) at gas
pipe, and slide heater away from piping until
studs clear the heater.

6. Remove heat exchanger corner brackets.

7. Remove combustion chamber clips at the four
corners of the heat exchanger.

8. Lift heat exchanger straight up using caution not to
damage refractory.

49

HEAT EXCHANGER RE-ASSEMBLY

COMBUSTION CHAMBER REMOVAL

1. Heat exchanger water header O-rings should be
replaced with new ones.

2. Install in/out and return water headers and
install header retainer nuts and torque nuts evenly.

3. Install the four (4) corner clips between tube
sheets and refractory. Replace "V" baffles.

4. Install thermostat sensing bulbs in header wells
and replace bulb retaining clips.

5. Install inlet and return pipes in water headers
using pipe thread sealant.

6. Install water pressure relief valve, flow switch, and
low water cut-off devices (if so equipped).

7. Open water supply and return shut-off valves. Fill
heater and water piping system with water. Check
heater and piping system for leaks at full line pres­sure. Run system circulating pump for a minimum
of 1/2 hour with heater shut-off.

8. Shut down entire system and vent all radiation
units and high points in system piping. Check all
strainers for debris. Expansion tank water level
should be at the 1/4 mark and the balance of
the tank filled with air.

9. Install flue collector, jacket top and inspection
panels. Install top holding screws. Install draft
diverter and vent piping if so equipped.

10. If gas piping was disconnected, reconnect gas
piping system and check for leakage using a
soap solution.

11. Check for correct water pressure and water level in
the system. Make sure that system pump operates
immediately on the call for heat. The system is
ready for operation.

12. Within two (2) days of start-up, recheck all air vents
and expansion tank levels.

To remove combustion chamber you must first
have removed the heat exchanger. Unbolt metal
combustion chamber retainer from top and remove
combustion chamber panels individually.

REFRACTORY PANELS TOP VIEW

CONTROL WELL REPLACEMENT

Remove top, sensing bulb and clip. Collapse well
tube at the open and with a chisel, push through into
header and remove the well through header. Insert a
new well and roll into place. If a roller is not available,
solder the well in place with silver solder.

TUBE REPLACEMENT

1. Remove heat exchanger from heater following

instructions outlined under HEAT EXCHANGER

REMOVAL above.

2. Remove in/out and return headers. Remove

"V" baffle from damaged tube.

3. Remove damaged tube by cutting with a hack saw

or shearing with a chisel adjacent to each tube

sheet.

4. Collapse stub ends in tube sheets using a chisel or

screwdriver. DO NOT cut into tube sheet or mar

surface in tube hole in any way.

5. Insert replacement tube by inserting the end with

the most fins removed in the opening of one tube

sheet. Slide tube until the opposite end clears the

other tube sheet and fit the tube into the hole.

6. Insert the tube roller into tube opening up to stop,

making certain that 1/8" of tube projects beyond

the tube sheet.

7. Attach drill to tube roller, holding it straight and

level.

Fig# 9337

TYPICAL HEAT EXCHANGER CONFIGURATION

Note: Use a 3/8" heavy duty, reversible, electric drill or
larger. Proceed to expand tube until tool starts to grab.
Approximately 1/2 to 1" of the tool shank will be visible.

8. Reverse drill motor and withdraw tube roller, If

necessary wrench out by hand.

50

9. DO NOT apply excessive torque during rolling
operation and avoid thinning any wall of the tube
beyond 0.015".

10. Use same procedure on opposite end.

11. Apply line pressure test. Re-roll if necessary.

12. Reinstall as outlined under HEAT EXCHANGER
REASSEMBLY.

REPLACEMENT PARTS

See separate parts sheet in instruction envelope.
NOTE: To supply the correct part it is important that you

state the model number, serial number and type of gas
when applicable.

CLEANING FLUE GAS PASSAGEWAYS

Soot will clog areas between fins and cause even-

tual tube failure. Any sign of soot at base of burners or
around outer jacket indicates a need for cleaning.

1. Lift off drafthood and flue collector by removing
bolts and screws.

2. Remove "V" baffles from heat exchanger.

3. Remove burner tray.

4. Take garden hose and wash heat exchanger,
making sure soot is removed from between fins.

(Avoid excessive water against refractory).

5. Reassemble: When heater is fired, some steam
will form from wet refractory. This is normal.

6. Identify and correct reason for soot formation.

NOTE: In extreme cases it may be necessary to
remove the heat exchanger completely for cleaning.
The simplest method is high pressure cleaning at a
local car wash. DO NOT WIRE BRUSH!

CAUTION:

Soot is combustible, so exercise extreme care.

Any part returned for replacement under standard
company warranties must be properly tagged with
RAYPAK return parts tag, completely filled in with the
heater serial number, model number, etc., and shipped
to the Company freight prepaid.

If determined defective by the Company and within
warranty, the part will be returned in kind or equal
substitution, freight collect. Credit will not be issued.

RAYPAK, INC.

2151 Eastman Avenue

Oxnard, CA 93030

51

ILLUSTRATED PARTS LIST

AVAILABLE AT

WWW.RAYPAK.COM

CATALOG

MODEL NUMBER

133 9300.11
181-401 9300.203
334-824 9300.35
926-1826 9300.50
2001-2500 9300.60

WARRANTY

LIMITED PARTS WARRANTY

RAYTHERM™ COMMERCIAL HEATERS

SCOPE:

Raypak, Inc. ("Raypak") warrants to the original owner that all parts of this heater which are actually manufactured by Raypak will
be free from failure under normal use and service for the specified warranty periods and subject to the conditions set forth in this
Warranty. Labor charges and other costs for parts removal or reinstallation, shipping and transportation are not covered by this
Warranty but are the owner's responsibility.

ANY PART MANUFACTURED BY RAYPAK:

One (1) year warranty from date of heater installation, or eighteen (18) months from date of factory shipment based on
Raypak's records, whichever comes first.
SATISFACTORY PROOF OF INSTALLATION DATE, SUCH AS INSTALLER INVOICE, IS REQUIRED. THIS WARRANTY WILL
BE VOID IF THE HEATER RATING PLATE IS ALTERED OR REMOVED.

HEAT EXCHANGER WARRANTY:

Domestic Hot Water
Five (5) years from date of heater installation. Includes copper heat exchanger with bronze and cast iron waterways.
Ten (10) years from date of heater installation. Includes only cupro-nickel heat exchanger with bronze or cast iron waterways.
Space Heating (Closed Loop System)
Ten (10) years from date of heater installation. Includes both cupro-nickel and copper heat exchanger with bronze or cast iron
waterways.
Thermal Shock Warranty
Twenty (20) years from date of heater installation against "Thermal Shock" (excluded, however, if caused by heater operation at large
changes exceeding 150°F between the water temperature at intake and heater temperature, or operating at heater temperatures exceeding
230°F).

ADDITIONAL WARRANTY EXCLUSIONS:

This warranty does not cover failures or malfunctions resulting from:

1. Failure to properly install, operate or maintain the heater in accordance with our printed instructions provided;

2. Abuse, alteration, accident, fire, flood and the like;

3. Sediment or lime build-up, freezing, or other conditions causing inadequate water circulation;

4. High velocity flow exceeding heater design rates;

5. Failure of connected systems devices, such as pump or controller;

6. Use of non-factory authorized accessories or other components in conjunction with the heater system;

7. Failure to eliminate air from, or replenish water in, the connected water system;

8. Chemical contamination of combustion air or use of chemical additives to water.

PARTS REPLACEMENT:

Under this Warranty, Raypak will furnish a replacement for any failed part. The failed part must first be returned to Raypak if
requested, with transportation charges prepaid, and all applicable warranty conditions satisfied. The replacement part will
be warranted for only the unexpired portion of the original warranty. Raypak makes no warranty whatsoever on parts manufactured
by others, but Raypak will apply any such warranty as may be provided by the parts manufacturers.

TO MAKE WARRANTY CLAIM:

Promptly notify the original installer, supplying the model and serial numbers of the unit, date of installation and description of the
problem. The installer must then notify a Raypak distributor for instructions regarding the claim. If either is not available, contact
Service Manager, Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA or call [phone]. In all cases proper authorization must first
be received from Raypak before replacement of any part.

EXCLUSIVE WARRANTY - LIMITATION OF LIABILITY:

This is the only warranty given by Raypak. No one is authorized to make any other warranties on Raypak's behalf. THIS
WARRANTY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. RAYPAK'S SOLE LIABILITY AND THE
SOLE REMEDY AGAINST RAYPAK WITH RESPECT TO DEFECTIVE PARTS SHALL BE AS PROVIDED IN THIS WARRANTY.
IT IS AGREED THAT RAYPAK SHALL HAVE NO LIABILITY, WHETHER UNDER THIS WARRANTY, OR IN CONTRACT, TORT,
NEGLIGENCE OR OTHERWISE, FOR ANY SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGE, INCLUDING DAMAGE
FROM WATER LEAKAGE. Some states do not allow limitations on how long an implied warranty lasts, or for the exclusion of
incidental or consequential damages. So the above limitation or exclusion may not apply to you.
This Limited Warranty gives you specific legal rights. You may also have other rights which may vary from state to state. We
suggest that you complete the information below and retain this certificate in the event warranty service is needed. Reasonable
proof of the effective date of the warranty (date of installation) must be presented, otherwise, the effective date will be based on
the date of manufacture plus thirty (30) days.

TYPES H, NH & WH

MODELS 133 TO 4001

_____________________________________________________ ______________________________________________
Name of Owner Name of Dealer
_____________________________________________________ ______________________________________________
Address Address
_____________________________________________________ ______________________________________________

_____________________________________________________ ______________________________________________
Model No. Serial No.

Date of Installation:_____________________________________ Date of Initial Operation: ___________________________
RAYPAK, INC. • 2151 Eastman Avenue • Oxnard, CA 93030 • [phone] • Fax [phone] • www.raypak.com
P/N: 240532

52

www.raypak.com

Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA 93030 [phone] FAX [phone]

Raypak Canada LTD, 2805 Slough Street, Mississauga, Ontario, Canada L4T 1G2 [phone] FAX [phone]

Litho in U.S.A.