INSTALLATION & OPERATING
INSTRUCTIONS
Models 122–322
Types H, WH & P
L
W
WARNING: If these instructions are not followed exactly, a fire or explosion may
result causing property damage, personal injury or death.
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.
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.
Installation and service must be performed by a qualified installer, service agency or
the gas supplier.
This manual should be maintained in legible condition and kept adjacent to the heater or in another safe place for
future reference.
CATALOG NO. 1000.53H
Effective: 09-19-08
Replaces: 11-16-07
P/N 241112 Rev. 9
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CONTENTS
WARNINGS
4
4
Main Burner Adjustment
37
37
38
38
38
38
39
39
Pay Attention to These Terms
BEFORE INSTALLATION
Product Receipt
Safety Inspection
Follow-Up
5
5 POST START-UP CHECK
Model Identification
5 OPERATION
Ratings and Certifications
Installations at Elevation
Component Locations
General Information
5
5
Operating Instructions
To Turn Off Gas To Appliance
6 MAINTENANCE
7
Suggested Minimum Maintenance
Time/Temperature Relationships in Scalds 8 Schedule
39
40
40
GENERAL SAFETY
Clearances
Equipment Base
INSTALLATION
8 APPENDIX
9
9
9
Inside Combustion Air Contamination
Installation Codes
9
Combustion and Ventilation Air
Conventional Combustion Air Supply
Water Piping
11
11
12
13
15
17
17
19
21
32
33
33
33
33
34
34
Hydronic Heating
Domestic Hot Water Piping
Pool Heating
Gas Supply
Electrical Power Connections
Venting
Outdoor Installation
High Limit (Manual Reset)
Flow Switch
CONTROLS
Ignition Control Module
Low Water Cut Off (Optional)
Operating Control
WIRING DIAGRAM—MODELS 122
–322
35
36
36
36
36
36
36
36
36
36
37
PRE-START-UP
Filling System-Heating Heaters
Domestic Hot Water Heaters
Inspect Venting System
For Your Safety Read Before Lighting
Pre-Start-Up Check
INITIAL START-UP
Tools Needed
Preparation for Start-Up
Start-Up
3
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WARNINGS - Pay Attention to These Terms
Indicates the presence of immediate hazards which will cause severe
DANGER:
personal injury, death or substantial property damage if ignored.
Indicates the presence of hazards or unsafe practices which could cause
WARNING:
severe personal injury, death or substantial property damage if ignored.
Indicates the presence of hazards or unsafe practices which could cause
CAUTION:
minor personal injury or product or property damage if ignored.
Indicates special instructions on installation, operation, or maintenance which
are important but not related to personal injury hazards.
NOTE:
DANGER: Make sure the gas on which the heater
will operate is the same type as that specified on the
heater rating plate.
WARNING: To minimize the possibility of improper
operation, serious personal injury, fire, or damage to
the heater:
•
Always keep the area around the heater free of
combustible materials, gasoline, and other
flammable liquids and vapors.
WARNING: Should overheating occur or the gas
supply valve fail to shut, do not turn off or disconnect
the electrical supply to the heater. Instead, shut off
the gas supply at a location external to the heater.
•
Heater should never be covered or have any
blockage to the flow of fresh air to the heater.
WARNING: Risk of electrical shock. More than one
disconnect switch may be required to deenergize the
equipment before servicing.
WARNING: Do not use this heater if any part has
been under water. Immediately call a qualified
service technician to inspect the heater and to
replace any part of the control system and any gas
control which has been under water.
WARNING - CALIFORNIA PROPOSITION
65: This product contains chemicals known to the
State of California to cause cancer, birth defects or
other reproductive harm.
CAUTION: Operation of this heater in low-
temperature systems requires special piping.
Harmful internal condensation will occur if the inlet
water temperature does not exceed 105°F. Warranty
claims will be denied when condensation occurs.
WARNING: This unit contains refractory ceramic
fiber (RCF) insulation in the combustion chamber.
RCF, as manufactured, does not contain respirable
crystalline silica. However, following sustained
exposure to very high temperatures (>2192F), the
RCF can transform into crystalline silica
(cristabolite). The International Agency for Research
on Cancer (IARC) has classified the inhalation of
crystalline silica (cristabolite) as carcinogenic to
humans.
CAUTION: If this heater is to be installed above
radiation level, it must be provided with a low water
cut-off device at the time of heater installation.
CAUTION: If this heater is to be installed in a
negative or positive pressure equipment room, there
are special installation requirements. Consult factory
for details.
When removing the burners or heat exchangers,
take precautions to avoid creating airborne dust and
avoid inhaling airborne fibers. When cleaning spills,
use wet sweeping or High Efficiency Particulate Air
(HEPA) filtered vacuum to minimize airborne dust.
Use feasible engineering controls such as local
exhaust ventilation or dust collecting systems to
minimize airborne dust. Wear appropriate personal
protective equipment including gloves, safety
glasses with side shields, and appropriate NIOSH
certified respiratory protection, to avoid inhalation of
airborne dust and airborne fiber particles.
CAUTION: This heater requires forced water
circulation when the burner is operating. See
minimum and maximum flow rates. Severe damage
will occur if the heater is operated without proper
water flow circulation.
4
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the left inside jacket of the heater. The model number
will have the form H3 0162 or similar depending on the
heater size and configuration. The first character of the
model number identifies application (H = Hydronic
Heating System, WH = Hot Water Supply System, P =
Pool Application). The second character identifies the
firing mode (3 - two stage firing, 4 - On/Off firing ). The
next four places identify the size of the heater.
BEFORE INSTALLATION
Raypak strongly recommends that this manual be re-
viewed thoroughly before installing your Hi Delta
heater. Please review the General Safety information
before installing the heater. Factory warranty does not
apply to heaters that have been improperly installed or
operated (refer to the warranty at the back of this man-
ual). Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
If, after reviewing this manual, you still have questions
which this manual does not answer, please contact
your local Raypak representative or visit our website at
Ratings and Certifications
Standards:
•
•
•
•
Gas-Fired Low Pressure Steam and Hot Water
Heaters, ANSI Z21-13 • CSA 4.9 - latest edition
Industrial and Commercial Gas-Fired Package
Heaters, CAN 3.1 - latest edition
Thank you for purchasing a Raypak product. We hope
you will be satisfied with the high quality and durability
of our equipment.
Gas-Fired Pool Heaters, ANSI Z21.56 • CSA 4.7 -
latest edition
Gas Water Heaters, ANSI Z21.10.3 • CSA 4.3 - lat-
est edition
Product Receipt
On receipt of your heater it is suggested that you visu-
ally check for external damage to the shipping crate. If
the crate is damaged, make a note to that effect on the
Bill of Lading when signing for the shipment. Next,
remove the heater from the shipping packaging.
Report any damage to the carrier immediately.
All Raypak heaters are National Board Approved, and
design-certified and tested by the Canadian Standards
Association (CSA) for the U.S. and Canada. Each
heater is constructed in accordance with Section IV of
the American Society of Mechanical Engineers
(ASME) Heater Pressure Vessel Code and bears the
ASME stamp. The heater also complies with the latest
edition of ASHRAE 90.1 Standard.
On occasion, items are shipped loose. Be sure that
you receive the correct number of packages as indi-
cated on the Bill of Lading.
WARNING: Altering any Raypak pressure vessel
by installing replacement heat exchangers, tube
bundle headers, or any ASME parts not
manufactured and/or approved by Raypak will
instantly void the ASME and CSA ratings of the
vessel and any Raypak warranty on the vessel.
Altering the ASME or CSA ratings of the vessel also
violates national, state, and local approval codes.
Claims for shortages and damages must be filed with
the carrier by consignee. Permission to return goods
must be received from the factory prior to shipping.
Goods returned to the factory without an authorized
Returned Goods Receipt number will not be accepted.
All returned goods are subject to a restocking charge.
When ordering parts, you must specify the model and
serial number of the heater. When ordering under war-
ranty conditions, you must also specify the date of
installation.
Installations at Elevation
Rated inputs are suitable for up to 4500 feet elevation
without de-rate. Consult the Factory for installations at
any altitude in excess of 4500 feet.
Purchased parts are subject to replacement only
under the manufacturer’s warranty. Debits for defec-
tive replacement parts will not be accepted. Parts will
be replaced in kind only per Raypak’s standard war-
ranties.
Model Identification
The model identification number and heater serial
number are found on the heater data plate located on
5
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Component Locations
COMBUSTION AIR
INTAKE
FLUE EXHAUST
Fig. 1: Component Locations—Back
PRESSURE RELIEF
CONNECTION
WATER OUTLET
GAS CONNECTION
WATER INLET
VIEW PORT
Fig. 2: Component Locations—Left Side
HI LIMITS
Panels removed for clarity
Fig. 3: Component Locations—Front
6
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General Information
Quantity of
Vent Size (in.)
Model
No.
Burners Gas Valves Blowers Flue
Intake
122
162
202
242
322
3
4
5
6
8
2*
2*
2*
2*
2*
1
1
1
1
1
4
5
5
5
6
5
5
5
5
5
*Second valve located inside air plenum
Table A: Basic Data
Burners per Valve
Stages
% Fire at Stage
Model
No.
A
2
3
3
4
5
B
1
1
2
2
3
1
A
A
A
A
A
2
1
2
122
162
202
242
322
AB
AB
AB
AB
AB
66
75
60
66
63
100
100
100
100
100
Table B: Manifold Data
Fig. 5: Air Shutter Adjustment
Fig. 4: Gas Valve Detail
7
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GENERAL SAFETY
To meet commercial hot water use needs, the high
limit safety control on this water heater will shut off the
main gas valve before the outlet temperature reaches
210°F. However, water temperatures over 125°F can
cause instant severe burns or death from scalds.
When supplying general purpose hot water, the rec-
ommended initial setting for the temperature control is
125°F.
Safety and energy conservation are factors to be con-
sidered 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 of the application.
Water temperature over 125°F can
causeinstantsevereburnsordeath
from scalds.
Children, disabled, and elderly are
at highest risk of being scalded.
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 set-
ting temperature at water heater.
•
•
Feel water before bathing or showering.
Temperature limiting valves are available.
Feel water before bathing or show-
ering.
NOTE: When this water heater is supplying general
purpose hot water 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.
Temperature limiting valves are
available, see manual.
Time/Temperature
Relationships in Scalds
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.
Maximum water temperatures occur just after the
heater’s burner has shut off. To determine the water
temperature being delivered, turn on a hot water
faucet and place a thermometer in the hot water
stream and read the thermometer.
Water
Temp.
Time to Produce Serious
Burn
120°F
125°F
130°F
135°F
140°F
145°F
150°F
155°F
More than 5 minutes
1-1/2 to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1-1/2 seconds
About 1 second
Table courtesy of The Shriners Burn Institute
Table C: Time to Produce Serious Burn
8
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The temperature of the water in the heater can be reg-
ulated by using the temperature control. To comply
with safety regulations, the temperature control is set
at the lowest setting when shipped from the factory.
Equipment Base
The heater should be mounted on a level, structurally
sound surface. The heater is approved for installation
on a combustible surface but must NEVER be
installed on carpeting. Gas-fueled equipment installed
in enclosed parking garages must be located at least
18 in. above the floor.
To adjust the water temperature, insert a small straight
screwdriver into the adjustment screw on the front of
temperature control and turn the wheel to the desired
setting (See Fig. 6).
CAUTION: 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 catch 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 or service (circulator replacement, control
replacement, etc.).
WARNING: This product must be installed by a
licensed plumber or gas fitter when installed within
the Commonweatlh of Massachusetts.
Fig. 6: Temperature Control
CAUTION: Hotter water increases the risk of scald-
ing! There is a hot water scald potential if the
thermostat is set too high.
Clearances
Indoor Installations
INSTALLATION
Minimum Clearance Recommended
Heater
from Combustible
Surfaces
Service
Side
Clearance
Installation Codes
Floor*
Rear
0”
1”
0”
24”
24”
24”
1”
Installations must follow these codes:
Water Side
Other Side
Top
12”
1”
·
·
·
·
Local, state, provincial, and national codes, laws,
regulations and ordinances.
National Fuel Gas Code, ANSI Z223.1- latest edi-
tion (NFGC).
1”
Front
Open
2”
24”
2”
National Electrical Code, ANSI/NFPA 70 - latest
edition (NEC).
Standard for Controls and Safety Devices for
Automatically Fired Heaters, ANSI/ASME CSD-1,
when required (CSD-1).
For Canada only: CAN/CGA B149 Installation
Code (B149) and C.S.A. C22. 1 C.E.C. Part 1
(C22. 1).
Vent
* DO NOT install on carpeting.
Table D: Clearances – Indoor Installations
·
9
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FRONT VIEW
TOP VIEW
Fig. 7: Minimum Clearances from Combustible Surfaces—Indoor Installations
Outdoor Installations
When installed according to the listed minimum clear-
ances from combustible construction, these heaters
can still be serviced without removing permanent
structural construction around the heater. However, for
ease of servicing, we recommend a clearance of at
least 24 in. in front, and at least 36 in. on the water
connection side. This will allow the heater to be serv-
iced in its installed location without movement or
removal of the heater.
These heaters are design-certified for outdoor installa-
tion. Heaters must not be installed under an overhang
unless clearances are in accordance with local instal-
lation codes and the requirements of the gas supplier.
Three sides must be open in the area under the over-
hang. Roof water drainage must be diverted away
from heaters installed under overhangs.
Service clearances less than the minimums may
require removal of the heater to service either the heat
exchanger or the burner tray. In either case, the heater
must be installed in a manner that will enable the
heater to be serviced without removing any structure
around the heater.
Recommended
Service
Min. Clearance
from Combustible
Surfaces
Heater
Side
Clearance
Front
Rear
Open
24”
24”
36”
36”
36”
N/A
12”
36”
Water Side
Other Side
Top
36”
Unobstructed
N/A
Vent
Table E: Clearances – Outdoor Installations
Fig. 8: Minimum Clearances from Combustible Surfaces—Outdoor Installations
10
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a motorized sealed damper to prevent the circula-
tion of cold air through the heater during the
non-operating hours.
These clearances are required when the outdoor
vent cap is used. If installing the heater outdoors
with a vent stack, the indoor clearances may be
utilized.
Conventional Combustion Air
Supply
The combustion air intake hood MUST be used for
outdoor installations. The hood is shipped loose and
installed on the side of the heater over the filter box at
the job site.
U.S. Installations
All Air from Inside the Building
Combustion and Ventilation Air
The confined space shall be provided with two perma-
nent openings communicating directly with an
additional room(s) of sufficient volume so that the com-
bined volume of all spaces meets the criteria for an
unconfined space. The total input of all gas utilization
equipment installed in the combined space shall be
considered in making this determination. Each open-
ing shall have a minimum free area of 1 square inch
per 1,000 Btu per hour (22 cm² per kW) of the total
input rating of all gas utilization equipment in the con-
fined space, but not less than 100 in.² (645 cm²). One
opening shall commence within 12 in. (30 cm) of the
top, and one opening shall commence within 12 in. (30
cm) of the bottom, of the enclosure. The minimum
dimension of air openings shall be not less than 3 in.
(8 cm) in any direction.
Indoor Units
The heater must be supplied with sufficient quantities
of non-contaminated air to support proper combustion
and equipment ventilation. Combustion air can be sup-
plied via conventional means where combustion air is
drawn from the area immediately surrounding the
heater, or via direct vent, where combustion air is
drawn directly from outside. All installations must com-
ply with the requirements of the NFGC (U.S.) and
B149 (Canada), and all local codes.
CAUTION: Combustion air must not be
contaminated by corrosive chemical fumes which
can damage the heater and void the warranty. (See
the Appendix.)
All Air from Outdoors
The confined space shall communicate with the out-
doors in accordance with methods 1 or 2. The
minimum dimension of air openings shall not be less
than 3 in. (8 cm) in any direction. Where ducts are
used, they shall be of the same cross-sectional area
as the free area of the openings to which they connect.
Direct Combustion Air
If outside air is drawn through the intake pipe directly
to the unit for combustion:
1. Install combustion air direct vent in accordance
with the venting section of this manual.
1. Two permanent openings, one commencing with-
in 12 in. (30 cm) of the top, and one commencing
within 12 in. (30 cm) of the bottom, of the enclo-
sure shall be provided. The openings shall
communicate directly, or by ducts, with the out-
doors or spaces (crawl or attic) that freely
communicate with the outdoors.
2. Provide adequate ventilation of the space occu-
pied by the heater(s) by an opening(s) for
ventilation air at the highest practical point com-
municating with the outdoors. The total
cross-sectional area shall be at least 1 in.2 of free
area per 20,000 BTUH (111 mm2 per kW) of total
input rating of all equipment in the room when the
opening is communicating directly with the out-
doors or through vertical duct(s). The total
cross-sectional area shall be at least 1 in.2 of free
area per 10,000 BTUH (222 mm2 per kW) of total
input rating of all equipment in the room when the
opening is communicating with the outdoors
through horizontal duct(s).
a. Where directly communicating with the out-
doors or where communicating to the
outdoors through vertical ducts, each opening
shall have a minimum free area of 1 sq in. per
4000 Btu per hr (5.5 cm2 per kW) of total input
rating of all equipment in the enclosure.
b. Where communicating with the outdoors
through horizontal ducts, each opening shall
have a minimum free area of 1 sq in. per 2000
3. In cold climates, and to mitigate potential freeze-
up, Raypak highly recommends the installation of
11
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Btu per hr (11 cm2 per kW) of total input rating
of all equipment in the enclosure.
than 18 in. (450 mm) nor less than 6 in. (150 mm)
above the floor level. The duct can also "Goose
Neck" through the roof. The duct is preferred
straight down 18” from floor, but do not place near
piping. This air supply opening requirement shall
be in addition to the air opening for ventilation air
required in (1).
2. One permanent opening, commencing within 12
in. (30 cm) of the top of the enclosure, shall be
permitted where the equipment has clearances of
at least 1 in. (2.5 cm) from the sides and back and
6 in. (16 cm) from the front of the appliance. The
opening shall directly communicate with the out- 3. For heaters not using a barometric damper in the
doors or shall communicate through a vertical or
horizontal duct to the outdoors or spaces (crawl or
attic) that freely communicate with the outdoors,
and shall have a minimum free area of:
vent system, and when air supply is provided by
natural air flow from outdoors for a power burner
and there is no draft regulator, drafthood or similar
flue gas dilution device installed in the same
space, in addition to the opening for ventilation air
required in (1), there shall be a permanent air sup-
ply opening(s) having a total cross-sectional area
of not less than 1 sq. in. for each 30,000 BTUH (70
sq. mm per kW) of total rated input of the burn-
er(s), and the location of the opening(s) shall not
interfere with the intended purpose of the open-
ing(s) for ventilation air referred to (1). This
opening(s) can be ducted to a point neither more
than 18 in. (450 mm) nor less than 6 in. (150 mm)
above the floor level. The duct can also "Goose
Neck" through the roof. The duct is preferred to be
straight down 18” from floor, but do not place near
piping.
a. 1 sq in. per 3000 Btu per hr (7 cm2 per kW) of
the total input rating of all equipment located in
the enclosure, and
b. Not less than the sum of the areas of all vent
connectors in the confined space.
WARNING: Do not use one permanent opening
method if the equipment room is under negative
pressure conditions or the equipment is common
vented with other gas-fired appliances.
Canadian Installations
4. Refer to the latest version of the B149 for addition-
al information.
CAUTION: All combustion air must be drawn from
the air outside of the building; the mechanical equip-
ment room must communicate directly with the
outdoors.
Water Piping
General
The heater should be located so that any water leaks
will not cause damage to the adjacent area or struc-
tures.
1. Ventilation of the space occupied by the heater
shall be provided by an opening(s) for ventilation
air at the highest practical point communicating
with outdoors. The total cross-sectional area of
such an opening(s) shall be at least 10% of the
area required in (2) and (3), but in no case shall
the cross-sectional area be less than 10 sq. in.
(6500 sq. mm.).
CAUTION: This heater requires forced water
circulation when the burner is operating. See Table F
and Table G for minimum and maximum flow rates
and water pump selection. The pump must be
interlocked with the heater to prevent heater
operation without water circulation.
2. For heaters using a barometric damper in the vent
system, and when air supply is provided by natu-
ral air flow from the outdoors for natural draft,
partial fan assisted, fan-assisted or power draft-
assisted burners, there shall be a permanent air
supply opening(s) having a cross section area of
not less than 1 sq. in. per 7000 BTUH (310 sq. mm
per kW) up to and including 1 million BTUH, plus
1 sq. in. per 14000 BTUH (155 sq. mm per kW) in
excess of 1 million BTUH. This opening(s) shall be
either located at or ducted to a point neither more
Relief Valve Piping
WARNING: Pressure relief valve discharge piping
must be piped near the floor and close to a drain to
eliminate the potential of severe burns. Do not pipe
to any area where freezing could occur. Refer to
local codes.
12
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Hydrostatic Test
Low Temperature System
Unlike many other types of heaters, Raypak heaters Heater requires minimum inlet temperature of 105°F.
do not require hydrostatic testing prior to being placed Consult the following sections for piping details.
in operation. The heat exchanger has already been
factory-tested and is rated for 160 PSI maximum oper-
ating pressure. However, Raypak does recommend
hydrostatically testing the piping connections to the
heater and the rest of the system prior to operation.
This is particularly true for hydronic systems using
expensive glycol-based antifreeze. Raypak recom-
mends conducting the hydrostatic test before
connecting gas piping or electrical supply.
Temperature & Pressure Gauge
The temperature and pressure gauge is factory-
mounted in the in/out header.
Hydronic Heating
Pump Selection
Leaks must be repaired at once to prevent damage to
the heater. NEVER use petroleum-based stop-leak
compounds.
In order to ensure proper performance of your boiler
system, you must install a properly sized pump.
Raypak recommends using a 20°F Delta T as design
Delta T. (Delta T is the temperature difference between
the inlet and outlet water when the heater is firing at
full rate). If a Delta T larger than 20°F is necessary,
see Table F for minimum flow rate requirements.
1. Connect fill water supply. Fill heater with water (be
sure bleed valve is open). When water flows from
bleed valve, shut off water. Close bleed valve.
Carefully fill the rest of the system, being sure to
eliminate any entrapped air by using high point
vents. Close feed valve. Test at standard operating
pressure for at least 24 hours.
Pressure Drop in Feet of Head
Feedwater Regulator
2. Make sure constant gauge pressure has been
maintained throughout test.
Raypak recommends that a feedwater regulator be
installed and set at 12 PSIG minimum pressure at the
highest point of system. Install a check valve or back
flow device upstream of the regulator, with a manual
shut off valve as required by local codes.
3. Check for leaks. Repair if found.
10°F ΔT
20°F ΔT
30°F ΔT
Min. Flow
Max. Flow
Model
No.
gpm ΔP (ft) gpm ΔP (ft) gpm ΔP (ft) gpm ΔP (ft)
ΔT
20
27
34
40
40
gpm ΔP (ft) ΔT
122
162
202
242
322
20
27
34
40
2.5
4.5
10
13
17
20
27
<1.0
1.10
1.85
2.65
4.70
10*
10
10
10
14
<1.0
<1.0
<1.0
<1.0
1.4
30
30
30
44
44
5.3
5.4
7
9
7.2
11
14
18
<1.0
1.3
5.5
11
9
10.0
11.8
12.2
2.2
12
* Flow switch (when used) will not activate at less than 12 gpm.
NOTE: Basis for minimum flow - 10 gpm or 40° Delta T
maximum flow - 44 gpm, except for 1.25” header.
Table F: Heater Rates of Flow and Pressure Drops
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Fig. 9: Single Boiler—Low Temperature Application (Heat Pump) Primary/Secondary Piping
Fig. 10: Dual Boiler—Primary/Secondary Piping
14
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Piping—Heating Boilers
Three-Way Valves
All high points should be vented. Purge valves and a Valves designed to blend water temperatures or
bypass valve should be installed. A boiler installed reduce water circulation through the boiler should not
above radiation level must be provided with a low be used. Raypak boilers are high recovery low mass
water cut-off device. The boiler, when used in connec- boilers not subject to thermal shock. Raypak offers a
tion with a refrigeration system, must be installed so full line of electric sequencers that produce direct reset
the chilled medium is piped in parallel with the boiler of boiler water temperature. Refer to the Controls
with appropriate valves to prevent the chilled medium
from entering the boiler.
Section in our Complete Catalog.
Domestic Hot Water Piping
The boiler piping system of a hot water heating boiler
connected to heating coils located in air handling units
where they may be exposed to circulating refrigerated
air, must be equipped with flow control valves or other
automatic means to prevent gravity circulation of the
boiler water during the cooling cycle. It is highly recom-
mended that the piping be insulated.
When designing the water piping system for domestic
water applications, water hardness should be consid-
ered. Table G indicates the suggested flow rates for
soft, medium and hard water. Hardness is specified as
grains per gallon.
Air-Separation/Expansion Tank
All boilers should be equipped with a properly sized
expansion tank and air separator fitting as shown in
the diagrams.
Soft (0–4 grains per gallon) Medium (5–15 grains per gallon) Hard* (16–25** grains per gallon)
Model
No.
ΔT gpm ΔP MTS SHL ΔT gpm
ΔP
MTS
SHL
7.8
7.9
8.0
5.9
6.6
ΔT gpm
ΔP
MTS
SHL
10.3
10.4
10.5
16.1
16.5
122
162
202
242
322
10
14
17
21
27
20
20
20
20
20
2.5 1-1/4 4.9
2.5 1-1/4 4.9
2.6 1-1/4 5.0
2.6 1-1/2 3.5
2.7 1-1/2 3.6
8
26
26
26
26
27
4.0 1-1/4
4.1 1-1/4
4.2 1-1/4
4.3 1-1/2
4.8 1-1/2
7
9
30
30
30
44
44
5.3 1-1/4
5.4 1-1/4
5.5 1-1/4
11.8 1-1/2
12.2 1-1/2
11
13
16
20
11
9
12
ΔT = Temperature rise, °F.
ΔP = Pressure drop through heat exchanger, ft.
SHL = System head loss, ft. (System head loss is based on the heater and tank placed no more than 5 feet apart and 25 feet equivalent length of
pipe and fittings.)
gpm = Gallons per minute, flow rate.)
MTS = Minimum tubing size.
*Must utilize optional cupro-nickel tubes.
**With Hard Water (16-25 grains per gallon), the operating control must be set no higher than 130F for scale free operation. For operating temper-
atures above 130F, a water softener must be utilized.
Table G: Domestic Water Heater Flow Rate Requirements
15
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Fig. 11: Single Heater—Domestic Hot Water with One Storage Tank
16
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Winterizing Your Heater
Pool Heating
When heaters installed outdoors in freezing climate
areas are to be shut down for the winter, please
observe the following procedure:
CAUTION: Power to the heater should be
interlocked with the main system pump to make sure
the heater does not fire without the main system
pump in operation. Improper flow control can
damage the heater. Uncontrolled flow (too high) or
restricted flow (too low) can seriously damage the
heater. Follow these instructions to make sure your
heater is properly installed.
Heaters installed outdoors in freezing climate areas
should be shut down for the winter. To shut down
heater, turn off manual main gas valve and main gas
shut-off. Close isolation valves and remove water pip-
ing from the in/out header of the heater. Drain the
heater and any piping of all water that may experience
below freezing temperatures.
The Hi Delta pool heater is equipped with an external
pump and bypass arrangement that blends outlet
water with the inlet to increase the inlet water temper-
ature, thereby reducing the likelihood of condensation
forming on the heat exchanger. The pump also serves
to circulate water through the heater from the main
system piping.
Pool and Spa Water Chemistry
NOTE: Chemical imbalance can cause severe
damage to your heater and associated equipment.
Maintain your water pH between 7.4 and 7.8 and
total alkalinity between 100 and 150 ppm. If the
mineral content and dissolved solids in the water
become too high, scale forms inside the heat
exchanger tubes, reducing heater efficiency and also
damaging the heater. If the pH drops below 7.2, the
heater will be severely damaged.
To complete the installation of the pool heater, the pool
thermostat needs to be installed in the main return
water line. This will ensure that the heater will be ener-
gized at the right time. If the main water line is too far
away from the heater and the capillary bulb will not
reach it, locate the pool thermostat adjacent to the
main line and run wires back to the heater.
NOTE: Heat exchanger damage resulting from
chemical imbalance and/or scaling is not covered
under the warranty.
Adjustment of the bypass valve is critical to proper
operation of the heater. The bypass valve should be
adjusted to achieve a minimum inlet water tempera-
ture of 105°F and an outlet water temperature
between 120°F and 140°F. When starting with a cold
pool, make initial adjustments. Make final adjustments
when pool water approaches desired temperature.
Gas Supply
DANGER: Make sure the gas on which the heater
will operate is the same type as specified on the
heater’s rating plate.
Automatic Chlorinators and
Chemical Feeders
All chemicals must be introduced and completely dilut-
ed into the pool or spa water before being circulated
through the heater. Do not place chlorine tablets or
bromine sticks in the skimmer. High chemical concen-
trations will result when the pump is not running (i.e.
overnight).
Gas piping must have a sediment trap ahead of the
heater gas controls, and a manual shut-off valve locat-
ed outside the heater jacket. A pounds to inches
regulator must be installed to reduce to gas supply
pressure to under 10.5 in. WC. The regulator should
be placed a minimum distance of 10 times the pipe
diameter upstream of the heater gas controls. All gas
piping must be tested after installation in accordance
with local codes. The heater and its gas connection
must be leak-tested before placing it in operation.
Chlorinators must feed downstream of the heater and
have an anti-siphoning device to prevent chemical
backup into the heater when the pump is shut off.
NOTE: High chemical concentrates from feeders
and chlorinators that are out of adjustment will cause
very rapid corrosion to the heat exchanger in the
heater. Such damage is not covered under the
warranty.
17
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MANUAL
SHUT OFF
VALVE
GAS
FLOW
SUPPLIED
SUPPLIED
GAS
MANUAL
SHUT OFF
VALVE
BY OTHERS
BY OTHERS
FLOW
EXTENTS OF
SEDIMENT TRAP
UNIT ENCLOSURE
EXTENTS OF
UNIT ENCLOSURE
SEDIMENT
TRAP
TO BURNERS
UNION
TO BURNERS
Fig. 12: Sediment Trap Orientation
Gas Supply Connection
Gas Supply Pressure
A minimum of 7 in. WC and a maximum of 10.5 in. WC
upstream gas pressure is required under load and no
load conditions for natural gas. A minimum of 11 in.
WC and a maximum of 13 in. WC is required for
propane gas. The gas pressure regulator supplied on
the heater is for low pressure service. If upstream
pressure exceeds 14 in. WC, an intermediate gas
pressure regulator, of the lockup type, must be
installed.
CAUTION: The heater and its manual shutoff valve
must be disconnected from the gas supply during
any pressure testing of the gas supply system at test
pressures in excess of 1/2 PSIG (3.45 kPa). The
heater must be isolated from the gas supply piping
system by closing the manual shutoff valve during
any pressure testing of the gas supply piping system
at test pressures equal to or less than 1/2 PSIG.
Relieve test pressure in the gas supply line before
reconnecting the heater and its manual shut off valve
to the gas supply line. FAILURE TO FOLLOW THIS
PROCEDURE MAY DAMAGE THE GAS VALVES.
Over pressurized 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.
When connecting additional gas utilization equipment
to the gas piping system, the existing piping must be
checked to determine if it has adequate capacity.
Gas Pressure Regulator
The gas valve pressure regulator(s) on the heater are
nominally preset at 3.5 in. WC for natural gas, and
10.5 in. WC for propane gas manifold pressure. The
pressure at the gas valve outlet tap, measured with a
manometer,while in operation should be 3.5 0.1 in.
CAUTION: Do not use Teflon tape on gas line pipe
thread. A pipe compound rated for use with gas
systems is recommended. Apply sparingly only on
male pipe ends.
WC for natural gas and 10.5 in.
0.1 in. WC for
propane gas. If an adjustment is needed, turn the
adjustment screw clockwise to increase pressure or
counter-clockwise to decrease pressure.
CAUTION: Support gas supply piping with
hangers, not by the heater or its accessories. Ensure
the gas piping is protected from physical damage
and freezing where required.
18
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Electrical Power Connections
Installations must follow these codes:
·
National Electrical Code and any other national,
state, provincial or local codes or regulations hav-
ing jurisdiction
·
·
Safety wiring must be N.E.C. Class 1
Heater must be electrically grounded as required
by N.E.C.
·
In Canada, C22.1
The heater is wired for 120 VAC, 12 AMPS. The volt-
age is indicated on the tie-in leads. Consult the wiring
diagram shipped with the heater in the instruction
packet. The remote tank control stat, thermostat, or
electronic heater control as applicable, may be con-
nected to stage selector terminal (See wiring diagram).
24 Volts are supplied to this connection through the
heater transformer. DO NOT attach line voltage to the
“TH” leads. Before starting the heater check to ensure
proper voltage to the heater and pump.
AC = 108 Volts AC Minimum, 132 Volts AC MAX
AB = 108 Volts AC Minimum, 132 Volts AC MAX
BC = < 1 Volt AC
Fig. 13: Check Power Source
Making the Electrical Connections
Refer to Fig. 14 Wiring Connection, and the Wiring
Diagram.
Install a separate disconnect means for each load.
Use appropriate-sized wire as defined by NEC, CSA
and/or local code. All primary wiring should be 125% of
minimum rating.
1. Verify circuit breaker is properly sized by referring
to heater rating plate. A dedicated circuit breaker
should be provided.
2. Turn off all power to the heater. Verify that power
has been turned off by testing with a volt-ohm
meter prior to working with any electrical connec-
tions or components.
It is strongly recommended that all individually-pow-
ered control modules and the heater should be
supplied from the same power source.
Surge Protection
3. Observe proper wire colors while making electrical
connections. Many electronic controls are polarity
sensitive. Components damaged by improper
electrical installation are not covered by warranty.
Microprocessor-based and solid state controls are vul-
nerable to damage from voltage and amperage
fluctuations in the power supply. All sensitive control
components should be protected by a suitable com-
mercial-grade surge protection device.
4. Provide an external surge suppressor capable of
maintaining system integrity.
If any of the original wire as supplied with the heater
must be replaced, it must be replaced with 105°C wire
or its equivalent.
5. Provide overload protection and a disconnect
means for equipment serviceability as required by
local and state code.
Check the Power Source
6. Install heater controls, thermostats, or building
management systems in accordance with the
applicable manufacturer’s instructions.
WARNING: Using a volt-ohm meter (VOM), check
the following voltages at the terminal block inside the
unit. Make sure proper polarity is followed and house
ground is proven.
7. Conduit should not be used as the ground. There
must be a solidly wired ground.
NOTE: A grounding electrode conductor shall be
used to connect the equipment grounding
conductors, the equipment enclosures, and the
grounded service conductor to the grounding
electrode.
19
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Fig. 14: Single Stage and 2-Stage Tankstat
1. For Pool and Closed Loop Water Source Heat
Electrical Connections—Domestic
Hot Water
Pump applications, your heater should be config-
ured to operate in an ON/OFF firing mode. This
means that you will connect a single-pole control
to stage one of stage selector (Terminals 4 & 5).
Then jumper the remaining firing stages. For
example, if your heater is a 162, you will jumper
stage two. Then your heater will either be on at full
fire, or it will be off.
DANGER—SHOCK HAZARD: Make sure
electrical power to the heater is disconnected to
avoid potential serious injury or damage to
components.
CAUTION: Label all wires prior to disconnection
when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper
operation after servicing.
2. For multi-stage controller connections, connect
each stage of the control to the corresponding
stage selector terminal block in the heater. Stage
1 of the heater to stage 1 of the control. Stage 2 of
the heater to stage 2 of the control, and so on. Set
the operating control at the setpoint in which you
want the heater to maintain. Ensure that the sens-
ing bulb of the control is at the point in the system
that will best maintain the temperature you want.
For example, when you are heating a tank of
water, you want the operating control sensor bulb
in the tank.
NOTE: Minimum 18 AWG, 105°C, stranded wire
must be used for all low voltage (less than 30 volts)
external connections to the unit. Solid conductors
should not be used because they can cause
excessive tension on contact points. Install conduit
as appropriate. All high voltage wires must be the
same size (105°C, stranded wire) as the ones on the
unit or larger.
Consult the wiring diagram shipped with the heater in
the instruction packet. The Stage 1 connections are for
the remote tank control through the heaters 24 volt
transformer. DO NOT attach line voltage to the Stage
1 connection. Before starting heater, check to ensure
proper voltage to heater and pump.
Installer action is required to electrically enable your Hi
Delta heater to operate after making the power con-
nections. You must make a connection on Terminal
Block #3 for temperature control connections. This will
be done based on the controller option selected with
your heater order.
20
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SINGLE
STAGE
TANKSTAT
Venting
General
CAUTION: Proper installation of flue venting is criti-
cal for the safe and efficient operation of the heater.
Definition of Appliance Categories
Heaters are divided into four categories based on the
pressure produced in the exhaust and the likelihood of
condensate production in the vent.
STAGE 1
CONNECTION
Category I. A heater which operates with a non-posi-
tive vent static pressure and with a vent gas
temperature that avoids excessive condensate pro-
duction in the vent.
ATTACH STAGE 1 CONNECTIONS
ON HEATER TO THE SINGLE STAGE
Category II. A heater which operates with a non-posi-
tive vent static pressure and with a vent gas
temperature that may cause excessive condensate
production in the vent.
TANKSTAT AS SHOWN IN THE DIAGRAM ABOVE.
Fig. 15: Single Stage Tankstat
Category III. A heater which operates with a positive
vent pressure and with a vent gas temperature that
avoids excessive condensate production in the vent.
2-STAGE
TANKSTAT
Category IV. A heater which operates with a positive
vent pressure and with a vent gas temperature that
may cause excessive condensate production in the
vent.
See Table H for appliance category requirements for
the Hi Delta.
STAGE 2 CONNECTION OR
STAGE 1
STAGE 1 CONNECTION
CONNECTION
OF HEATER 2
NOTE: For additional information on appliance
categorization, see appropriate ANSI Z21 Standard
and the NFGC (U.S.), or B149 (Canada), or
applicable provisions of local building codes.
ATTACH STAGE 1 CONNECTIONS ON HEATER
TO STAGE 1 CONNECTION ON TANKSTAT.
ATTACH STAGE 2 CONNECTIONS OR
STAGE 1 CONNECTION OF HEATER 2
TO STAGE 2 CONNECTIONON TANKSTAT
AS SHOWN IN THE DIAGRAM.
Determination of Appliance
Category for Venting Purposes and
Venting Arrangements
Fig. 16: 2-Stage Tankstat
Heater must be electrically grounded in accordance
with NEC and C22.1(in Canada).
WARNING: Contact the manufacturer of the vent
material if there is any question about the appliance
categorization and suitability of a vent material for
application on a Category III or IV vent system.
Using improper venting materials can result in
personal injury, death or property damage.
NOTES:
1. Field installed ground to inside of junction box.
2. If any of the original wire as supplied with the
heater must be replaced, it must be replaced with
105°C wire or its equivalent.
21
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Combustion Air
Supply
Exhaust
Configuration
Certified
Appliance Material
Combustion Air
Inlet Material
Venting Category
Type B or and
Category I Venting
System*
Vertical Natural
I
Draft Venting
From Inside
Building (Non-Direct
Venting)
Horizontal
Thru-wall
Venting
Stainless Steel
(Gas Tight)
III
I
Type B or and
Category I Venting
System*
Vertical Venting
Galvanized Steel
PVC
From Outside
Building (Direct
Venting)
ABS
CPVC
Horizontal
Thru-wall
Venting
Stainless Steel
(Gas Tight)
III
*As defined in the latest edition of the NFGC, or in Canada, the B149.
Table H: Venting Category Requirements
Barometric Damper
Vent Terminal Location
A barometric damper may be required when vent
heights exceed 25 feet or when the draft is greater
than -0.08 in. WC. In these installations, a barometric
damper (single acting) is recommended.
NOTE: During winter months check the vent cap
and make sure no blockage occurs from build up of
snow. Condensate can freeze on the vent cap.
Frozen condensate on the vent cap can result in a
blocked flue condition.
The damper should be installed NO CLOSER than 18
in. from the discharge of the unit and no closer than 18
in. from a combustible ceiling. The damper can be General
installed in horizontal or vertical runs of vent pipe as
necessary. Installation in a bull-head tee is acceptable Give special attention to the location of the vent termi-
as shown in the NFGC.
nation to avoid possibility of property damage or
personal injury.
The weights on the damper should be adjusted per the
damper manufacturer’s instructions for proper opera- a) Gases may form a white vapor plume in winter.
tion.
The plume could obstruct a window view if the ter-
mination is installed in close proximity to windows.
Support of Vent Stack
b) Prevailing winds could cause freezing of conden-
sate and water/ice build-up on building, plants or
roof.
The weight of the vent stack or chimney must not rest
on the heater vent connection. Support must be pro-
vided in compliance with applicable codes. The vent
should also be supported to maintain proper clear-
ances from combustible materials.
c) The bottom of the vent terminal and the air intake
shall be located at least 12 in. above grade.
d) Un-insulated single-wall metal vent pipe shall not
be used outdoors on cold climates for venting gas
utilization equipment.
Use insulated vent pipe spacers where the vent pass-
es through combustible roofs and walls.
e) Through-the-wall vents for Category II and IV
appliances and non-categorized condensing appli-
ances shall not terminate over public walkways or
22
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Fig. 17: Minimum Clearances from Vent/Air Inlet Terminations – Indoor and Outdoor Installations
U.S. Installations1
Canadian Installations2
Clearance above grade, veranda, porch,
deck, or balcony
A
1 ft (30 cm)
1 ft (30 cm)
4 ft (1.2m) below or to side
of opening; 1 foot (30 cm)
above opening
Clearance to window or door that may be
opened
B
C
3 ft (91 cm)
Clearance to permanently closed window
*
*
Vertical clearance to ventilated soffit located
above the terminal within a horizontal dis-
tance of 2 ft (61cm) from the centerline of the
terminal
D
5 ft (1.5m)
*
E
F
Clearance to unventilated soffit
Clearance to outside corner
Clearance to inside corner
*
*
*
*
*
G
6 ft (1.83m)
3 ft (91 cm) within a height
15 ft above the me-
ter/regulator assembly
Clearance to each side of center line ex-
tended above meter/regulator assembly
H
I
*
*
Clearance to service regulator vent outlet
6 ft (1.83m)
Clearance to non-mechanical air supply inlet 4 ft (1.2m) below or to side
to building or the combustion air inlet to any
of opening; 1 ft (30 cm)
J
3 ft (91 cm)
other appliance
above opening
3 ft (91 cm) above if within
10 ft (3m) horizontally
K
L
Clearance to mechanical air supply inlet
6 ft (1.83m)
7 ft (2.13m) t
Clearance above paved sidewalk or paved
driveway located on public property
7 ft (2.13m)
Clearance under veranda, porch, deck or
balcony
M
*
12 in. (30 cm) TT
1
2
In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code
In accordance with the current CAN/CGA-B149 Installation Codes
t
Vent terminal shall not terminate directly above sidewalk or paved driveway located between 2 single family dwellings that serves
both dwellings
TT Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor and top of terminal and
underside of veranda, porch, deck or balcony is greater than 1 ft (30cm)
*
Clearances in accordance with local installation codes and the requirements of the gas supplier
Table I: Vent/Air Inlet Termination Clearances
23
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over an area where condensate or vapor could g) The vent terminal of a direct vent appliance with
create a nuisance or hazard or could be detrimen-
tal to the operation of regulators, relief valves, or
other equipment. Where local experience indi-
an input over 50,000 Btu per hour shall require a
12-inch vent terminal clearance.
cates that condensate is a problem with Category h) Terminate vent at least one (1) foot above grade,
I and III appliances, this provision shall also apply. including normal snow line.
f) Locate and guard vent termination to prevent acci- i) Multiple direct vent installations require a four (4)
dental contact by people or pets.
foot clearance between vent caps.
g) DO NOT terminate vent in window well, stairwell,
alcove, courtyard or other recessed area, unless
previously approved by local authority.
Canada Installations
Refer to latest edition of CAN/CGA-B149.
A vent shall not terminate:
h) DO NOT terminate above any door, window, or
gravity air intake. Condensate can freeze, causing
ice formations.
a) Directly above a paved sidewalk or driveway
which is located between two single family
dwellings and serves both dwellings
i) Locate or guard vent to prevent condensate from
damaging exterior finishes. Use a 2’ x 2’ rust
resistant sheet metal backing plate against brick
or masonry surfaces.
b) Less than 7 ft.(2.13m)above a paved sidewalk or
paved driveway located on public property
j) DO NOT extend exposed vent pipe outside of
building. Condensate could freeze and block vent
pipe.
c) Within 6 ft(1.8m) of a mechanical air supply inlet to
any building
d) Above a meter/regulator assembly within 3
ft(900mm) horizontally of the vertical centre-line of
the regulator
US Installations
Refer to latest edition of NFGC.
Vent termination requirements are as follows:
e) Within 6 ft.(1.8m) of any gas service regulator vent
outlet
a) Vent must terminate at least four (4) feet below, f) Less than 1 ft.(300mm) above grade level
four (4) feet horizontally, or one (1) foot above any
door, window or gravity air inlet to the building.
g) Within the 3 ft.(1m) of a window or door which can
be opened in any building, any non-mechanical air
supply inlet to any building or the combustion air
inlet of any other appliance
b) The vent must not be less than seven (7) feet
above grade when located adjacent to public walk-
ways.
h) Underneath a verandah, porch or deck, unless
c) Terminate vent at least three (3) feet above any
forced air inlet located within ten (10) feet.
(i) the verandah, porch or deck is fully open on a
minimum of two sides beneath the floor, and
d) Vent must terminate at least four (4) feet horizon-
tally, and in no case above or below unless four (4)
feet horizontal distance is maintained, from elec-
tric meters, gas meters, regulators, and relief
equipment.
(ii) the distance between the top of the vent termi-
nation and the underside of the verandah,
porch or deck is greater than 1 ft (30 cm).
e) Terminate vent at least six (6) feet away from adja-
cent walls.
f) DO NOT terminate vent closer than five (5) feet
below roof overhang.
24
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on, Venting of Equipment, of the latest edition of
NFGC, or in Canada, B149 Installation Code for Gas
Burning Appliances and Equipment, or applicable pro-
visions of local building codes.
Venting Installation Tips
Support piping:
·
·
·
horizontal runs- at least every five (5) feet.
vertical runs - use braces:
under or near elbows
10 FEET
OR LESS
VENT CAP
Follow items listed below to avoid personal injury or
property damage.
2' MIN.
2' MIN.
·
·
·
·
Cut nonmetallic intake pipe with fine-toothed hack-
saw.
Do not use nonmetallic intake pipe or fittings that
are cracked or damaged.
Do not use nonmetallic intake fittings if they are
cut or altered.
Do not drill holes, or use screws or rivets, in non-
metallic intake pipe or fittings.
To make metallic vent joints:
VENT PIPE
·
·
Do not install seams of vent pipe on bottom of
runs.
100% Seal all joints and seams with high temper-
ature silicone sealant.
COMBUSTION AIR
FILTER
WARNING: Examine the venting system at least
once a year. Check all joints and vent pipe
connections for tightness, corrosion or deterioration.
BOILER
UNIT
NOTE: The words "Flue Exhaust", "Flue" and
"Exhaust Vent" are used interchangeably.
Venting Configurations
For heaters connected to gas vents or chimneys, vent
installations shall be in accordance with the section
Fig. 18: Natural Draft Vertical Venting (Category I)
Min./Max. Venting
Minimum
Certified
Model Appliance
Venting
Length without
Recommended
No.
Category
Barometric
Material
Vent Size (inches)
Damper (feet)**
122
4
162
202
242
Type B or
Equivalent
I
5
5/25
322
6
**Vent lengths are based on a lateral length of 2 feet. Refer to the latest edition of the NFGC for fur-
ther details. (ANSI Z223.1)
Table J: Natural Draft Vertical Venting
25
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Natural Draft Vertical Venting
System Installation
CAUTION: Listed vent cap terminal must be used
and sized adequately to evacuate the flue products
from the heaters.
Natural draft venting uses the natural buoyancy of the
heated flue products to create a thermal driving head
that expels the exhaust gases from the flue. The neg-
ative draft must be within the range of -.01 in. to -.08
in. WC as measured 12 in. from the appliance flue out-
let to ensure proper operation. Vent material must be
listed by a nationally recognized test agency.
Natural Draft Vertical Venting with
Common Venting System, Category I
Appliance Only
Manifolds that connect more than one heater to a com-
mon 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
of the vent be less than the area of the largest heater
exhaust outlet.
The maximum and minimum venting length for
Category I appliance shall be determined per the lat-
est edition of the NFGC (U.S.) or B149 Installation
Code (Canada).
The diameter of vent flue pipe should be sized accord-
ing to Part 11 of the latest edition of the NFGC (U.S.)
and part 7 and appendix B of the B149 Installation
Code (Canada). The minimum flue pipe diameter for
conventional negative draft venting using double-wall
B type vent is 4” for 122, 5” for 162, 202 and 242, 6”
for 322.
WARNING: Vent connectors serving appliances
vented by natural draft shall not be connected into
any portion of mechanical draft systems operating
under a positive pressure.
CAUTION: Vent connectors for natural draft
venting systems must be type “B” vent or better.
NOTE: Vent Adapter will have to be used to connect
B vent to the unit.
Common venting systems may be too large when an
existing unit is removed. At the time of removal of an
existing appliance, the following steps must be fol-
lowed 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.
The connection from the appliance vent to the stack
must be as direct as possible and shall be the same
diameter as, or larger than the vent outlet. The hori-
zontal breaching of a vent must have an upward slope
of not less than 1/4 inch per linear foot from the heater
to the vent terminal. The horizontal portions of the vent
shall also be supported for the design and weight of
the material employed to maintain clearances and to
prevent physical damage or separation of joints.
a) Seal any unused opening in the common venting
system.
Natural Draft Vertical Vent
Termination
b) Visually inspect the venting system for proper size
and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion or other
unsafe condition.
The vent terminal should be vertical and should termi-
nate outside the building at least two (2) feet above the
highest point of the roof that is within 10 feet. The vent
cap should have a minimum clearance of four (4) feet
horizontally from and in no case above or below
(unless a four (4) foot horizontal distance is main-
tained) electric meters, gas meters, regulators and
relief equipment. The distance of the vent terminal
from adjacent public walkways, adjacent buildings,
open windows and building openings must be consis-
tent with the NFGC, or in Canada, the B149
Installation Code for Gas Burning Appliances and
Equipment. Gas vents supported only by flashing and
extended above the roof more than five feet should be
securely guyed or braced to withstand snow and wind
loads.
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 com-
mon venting system are located and other spaces
of the building. Turn on clothes dryers and any
appliance not connected to the common vent sys-
tem. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they will oper-
ate at maximum speed. Do not operate summer
exhaust fan. Close fireplace dampers.
d) Place in operation the appliances being inspected.
Follow the manufacturers instructions for lighting
26
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12"
MIN
INSULATED
EXHAUST
VENTING
FLUE EXHAUST
VENT CAP
COMBUSTION
AIR FILTER
12" MIN
BOILER
UNIT
Fig. 19: Horizontal Thru-Wall Venting (Category III)
each appliance. Adjust thermostat so appliance g) Any improper operation of the common venting
will operate continuously.
system should be corrected so that the installation
conforms with the latest edition of the NFGC (US)
and the B149 Installation Code (Canada). When
re-sizing any portion of the common venting sys-
tem, the common venting system should be
re-sized to approach the minimum size as deter-
mined using the appropriate tables in Appendix G
in the NFGC (US) and Appendix B of the B149
Installation Code (Canada).
e) Check the pressure at a pressure tap located 12
in. above the bottom joint of the first vertical vent
pipe. Pressure should be anywhere between -.01
to -.08 in. WC.
f) After it has been determined that each appliance
remaining connected to the common venting sys-
tem properly vents when tested as outlined above,
return doors, windows, exhaust fans, fireplace
dampers and other gas burning appliances to their
previous conditions of use.
Certified
Model Appliance
Venting
Vent Size
(inches)
Max. Venting
Length (feet)
No.
Category
Material
122
4
5
6
70
162
202
242
Stainless
Steel
(Gas Tight)
Subtract 10 ft per
elbow, maximum
three elbows
III
322
Table K: Horizontal Thru-Wall Venting (Category III)
27
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Horizontal Thru-wall Venting
System (Category III) Installation
Horizontal Thru-wall Direct Vent
Termination
These installations utilize the heater-mounted blower The flue exhaust direct vent cap MUST be mounted on
to vent the combustion products to the outdoors. the exterior of the building. The direct vent cap cannot
Combustion air is taken from inside the room and the be installed in a well or below grade. The direct vent
vent is installed horizontally through the wall to the out- cap must be installed at least one (1) foot above
doors. Adequate combustion and ventilation air must ground level and above normal snow levels. The
be supplied to the mechanical room in accordance Raypak supplied flue exhaust direct vent cap must be
with the NFGC or, in Canada, the B149 Installation utilized.
Code.
WARNING: No substitutions of flue pipe or vent
The total length of the horizontal thru-wall exhaust
cap material are allowed. Such substitutions would
jeopardize the safety and health of inhabitants.
vent system should not exceed seventy (70) feet in
length. If horizontal run exceeds 70 feet, an appropri-
ately sized extractor must be used. To maintain proper
operation pressure reading must be between -.01 to - The Stainless Steel direct vent cap must be fur-
.08 in. WC as measured 12 in. from the appliance flue nished by the heater manufacturer in accordance
outlet. Each elbow used is equal to ten (10) feet of with its listing.
straight pipe. This will allow installation in one of the
four following combinations.
Use only the special gas vent pipes listed for use with
category III gas burning heaters, such as the stainless
steel vent by Heat Fab Inc (800-772-0739), Protech
Systems, Inc. (800-766-3473) or Z-Flex (800-654-
5600). Pipe joints must be positively sealed. Follow
carefully the vent manufacturers installation instruc-
tions.
· 70’ of straight flue pipe.
· 60' of straight flue pipe and one elbow.
· 50' of straight flue pipe and two elbows.
· 40' of straight pipe and three elbows.
The vent cap is not considered in the overall length of
the venting system.
The vent must be installed to prevent the flue gas leak-
age. Care must be taken during assembly to ensure
that all joints are sealed properly and are airtight.
The vent must be installed to prevent the potential
accumulation of condensate in the vent pipes. It is rec-
ommended that:
a) The vent be installed with a slight downward slope
of not more than 1/4" per foot of horizontal run to
the vent terminal.
b) The vent be insulated through the length of the
horizontal run.
For appliances installed in extreme cold climate, it is
recommended that:
a) The vent be installed with a slight upward slope of
not more than 1/4" per foot of horizontal run to the
vent terminal. In this case, an approved conden-
sate trap must be installed per applicable codes.
b) The vent be insulated through the length of the
horizontal run.
28
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12"
VENT PIPE
VENT CAP
INTAKE
VENT
36" MIN.
INTAKE
VENT
COMBUSTION AIR
FILTER
6"
12" MIN.
BOILER
UNIT
Fig. 20: Direct Vent Horizontal Thru-Wall Venting (Category III)
Max.
Venting
Length
(feet)
Combustion
Air Intake
Pipe
Max. Air
Intake
Length
(feet)
Certified
Venting
Material
Air Inlet
Model
No.
Appliance
Category
Vent Size
(inches)
Size
(inches)
Material
122
4
5
6
40
Subtract 10
ft per
40
Subtract 10
ft per
Galvanized
Steel
162
202
242
Stainless
Steel
(Gas Tight)
III
PVC
5
elbow,
elbow,
ABS
CPVC
Max. two
elbows
Max. two
elbows
322
Table L: Horizontal Thru-Wall Venting
29
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Horizontal Thru-wall Direct Vent
System (Category III) Installation
Horizontal Thru-wall Direct Vent
Termination
These installations utilize the heater mounted blower The flue exhaust direct vent cap MUST be mounted on
to draw combustion air from outdoors and vent com- the exterior of the building. The direct vent cap cannot
bustion products to the outdoors.
be installed in a well or below grade. The direct vent
cap must be installed at least one (1) foot above
The total length of the thru-wall exhaust vent cannot ground level and above normal snow levels.
exceed forty (40) feet in length for the flue outlet. Each
elbow used is equal to ten (10) feet of straight pipe. Multiple direct vent caps MUST NOT be installed with
This will allow installation in one of the three following one combustion air inlet directly above a direct vent
combinations.
cap. This vertical spacing would allow the flue prod-
ucts from the direct vent cap to be pulled into the
combustion air intake installed above. This type of
installation can cause non warrantable problems with
components and poor operation of the unit due to the
recirculation of flue products. Multiple direct vent caps
· 40’ of straight flue pipe.
· 30' of straight flue pipe and one elbow.
· 20' of straight flue pipe and two elbows.
The total length air supply pipe cannot exceed forty should be installed in the same horizontal plane with a
(40) feet in length for the combustion air inlet. Each three (3) foot clearance from the side of one vent cap
elbow used is equal to ten (10) feet of straight pipe. to the side of the adjacent vent cap(s).
This will allow installation in one of the three following
combinations.
Combustion air supplied from outdoors must be free of
particulate and chemical contaminants. To avoid a
blocked flue condition, keep the vent cap clear of
snow, ice, leaves, debris, etc.
· 40’ of straight combustion air pipe
· 30' of straight combustion air pipe and one elbow.
· 20' of straight combustion air pipe and two elbows.
WARNING: No substitutions of flue pipe or vent
cap material are allowed. Such substitutions would
jeopardize the safety and health of inhabitants.
The flue exhaust direct vent cap is not considered in
the overall length of the venting system.
Care must be taken during assembly that all joints are
sealed properly and are airtight.
The Stainless Steel flue exhaust direct vent cap
The vent must be installed to prevent the potential must be furnished by the heater manufacturer in
accumulation of condensate in the vent pipes. It is rec- accordance with its listing. Use only the special gas
ommended that:
vent pipes listed for use with category III gas burning
heaters, such as the stainless steel vent by Heat Fab
a) The vent be installed with a slight downward slope Inc (800-772-0739), Protech Systems, Inc. (800-766-
of not more than 1/4" per foot of horizontal run to 3473) or Z-Flex (800-654-5600). Pipe joints must be
the vent terminal.
positively sealed. Follow carefully the vent manufac-
turers installation instructions.
b) The vent be insulated through the length of the
horizontal run.
For appliances installed in extreme cold climate, it is
recommended that:
a) The vent be installed with a slight upward slope of
not more than 1/4" per foot of horizontal run to the
vent terminal. In this case, an approved conden-
sate trap must be installed per applicable codes.
b) The vent be insulated through the length of the
horizontal run.
30
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36"
VENT CAP
36" MIN.
12" MIN.
VENT PIPE
INTAKE
VENT
COMBUSTION
AIR FILTER
BOILER
UNIT
Fig. 21: Direct Vent—Vertical Venting (Category I)
Min./Max.
Combustion
Max. Air
Intake
Length
(feet)
Certified
Venting
Material
Vertical
Venting
Height
(feet)
Air Inlet
Size
(inches)
Model
No.
Appliance
Category
Vent Size
(inches)
Air Intake
Pipe
Material
122
4
5
6
40
Subtract 10
ft per
Galvanized
Steel
162
202
242
Type B
Equivalent
I
5/25
PVC
5
elbow,
ABS
CPVC
Max. two
elbows
322
Table M: Vertical Venting
31
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blockage from snow. The vent cap must have a mini-
mum 3 foot clearance from the air inlet opening.
Vertical Direct Vent System
Installation
Outdoor Installation
These installations utilize the heater mounted blower
to draw combustion air from outdoors and uses the
natural buoyancy of the heated flue products to create Outdoor models are self-venting when installed with
a thermal driving head that expels the exhaust gases the factory-supplied restricted direct vent cap and
from the flue. The negative draft must be within the require no additional vent piping. This special vent cap
range of -0.01 to -0.08 in. WC as measured 12 in. from is provided with the heater in accordance with CSA
the appliance outlet to ensure proper operation. The requirements. It must be installed directly on the
vent material must be in accordance with the above heater. See Section B for correct clearances.
instructions for vent materials. Vent material must be
listed by a nationally recognized test agency.
Care must be taken when locating the outdoor unit
because the flue gases discharged from the vent hood
The maximum and minimum venting length for can condense as they leave the hood. Improper loca-
Category I appliance shall be determined per the lat- tion can result in damage to adjacent structures or
est edition of the NFGC (U.S.) and B149 Installation building finish. For maximum efficiency and safety, the
Code (Canada).
following precautions must be observed:
The connection from the appliance exhaust vent to the a) Outdoor models must be installed outdoors and
stack must be as direct as possible and should be the
same as or larger than the vent outlet. The vent must
be installed to prevent accumulation of condensate
must use the outdoor vent hood supplied by the
manufacturer.
and, where necessary, have means provided for b) Periodically check venting system. The heater’s
drainage of condensate. The horizontal breaching of a
vent must have an upward slope of not less than 1/4
inch per linear foot from the heater to the vent termi-
nal. The horizontal portions of the vent shall also be
supported for the design and weight of the material
employed to maintain clearances and to prevent phys-
ical damage or separation of joints.
venting areas must never be obstructed in any
way and minimum clearances must be observed
to prevent restriction of combustion and ventilation
air. Keep area clear and free of combustible and
flammable materials.
c) Do not locate adjacent to any window, door walk-
way, or gravity air intake. The vent must be located
a minimum of four (4) feet horizontally, or four (4)
feet below, or one (1) foot above such areas.
Vertical Direct Vent Termination
The exhaust vent terminal should be vertical and
should terminate outside the building at least two (2)
feet above the highest point of the roof within 10 feet.
The vent cap should have a minimum clearance of
four (4) feet horizontally from and in no case above or
below (unless a four (4) foot horizontal distance is
maintained) electric meters, gas meters, regulators
and relief equipment. The distance of the vent terminal
from adjacent public walkways, adjacent buildings,
open windows and building openings must be consis-
tent with the NFGC, or in Canada, the B149.
Installation Code. Gas vents supported only by flash-
ing and extended above the roof more than five feet
should be securely guyed or braced to withstand snow
and wind loads.
d) Install above grade level and above normal snow
levels.
e) Vent terminal must be at least 3 feet above any
forced air inlet located within 10 feet.
f) Adjacent brick or masonry surfaces must be pro-
tected with a rust-resistant sheet metal plate.
g) Multiple Outdoor Vent installations require a four
(4) feet clearance between vent caps.
NOTE: Condensate can freeze on the vent cap.
Frozen condensate on the vent cap can result in a
blocked flue condition.
The vertical direct vent cap is designed for roof top
mounting only. The air inlet opening MUST be installed
one (1) foot above the roof line or above normal snow
levels that might obstruct combustion air flow. This
dimension is critical to the correct operation of the
heater and venting system and reduces the chance of
The restricted vent cap must be furnished by the
heater manufacturer in accordance with its listing.
An outdoor air filter, supplied by the manufacturer is
mounted on the heater.
32
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CONTROLS
WARNING: Installation, adjustment and service of
heater controls including timing of various operating
functions must be performed by a qualified installer,
service agency or the gas supplier. Failure to do so
may result in control damage, heater malfunction,
property damage, personal injury, or death.
WARNING: Turn off the power to the heater before
installation, adjustment or service of the heater
controls. Failure to do so may result in heater
malfunction, property damage, personal injury, or
death.
Fig. 22: Ignition Module
High Limit (Manual Reset)
The heater is equipped with a manual reset high limit
temperature device. Push the reset button and adjust
the setting to 30° F or 40° F above desired operating
temperature.
CAUTION: This appliance has provisions to be
connected to more than one (1) supply source. To
reduce the risk of electric shock, disconnect all such
connections before servicing.
CAUTION: Risk of electric shock. More than one
(1) disconnect switch may be required to de-
energize the equipment before servicing.
Ignition Control Module
The interrupted proved ignition device conserves ener-
gy. When additional heat is needed, the combustion air
blower starts to purge all air from the combustion
chamber for about 15 seconds. On proof of air flow,
the air proving switch closes and the igniter is ener-
gized, eliminating the fuel costs of maintaining a
constant pilot.
Fig. 23: Manual Reset High Limit
To ensure safe operation, the gas valve cannot open
until the pilot igniter is verified. The 100% igniter safe-
ty is an electronic device which closes the main gas
valve within 8/10 of a second whenever the flame is
interrupted. Main burner is automatically lit when the
device is powered and pre-purged. Unit performs its
own safety check and opens the main valve only after
the igniter is proven to be capable of ignition.
33
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Flow Switch
Low Water Cut Off (Optional)
Dual-purpose control shuts off heater in case of pump The low water cut off automatically shuts down the
failure or low water flow. Mounted and wired in series burner whenever water level drops below the level of
with the main gas valve. Check with Manufacturer for
the sensing probe. A 3-second time delay prevents
proper paddle size. Utilize correct paddle size for prop- premature lockout due to temporary conditions such
er operation.
as power fluctuations or air pockets.
NOTE: Flow switch will not operate if flow is less
than 20 gpm.
Fig. 25: Low Water Cut Off
Fig. 24: Flow Switch
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WIRING DIAGRAM—MODELS 122–322
35
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4. Use only your hand to push in or turn the gas con-
trol knob. Never use tools. If the knob will not turn
by hand, do not try to repair it, call a qualified serv-
ice technician. Forced or attempted repair may
result in a fire or explosion.
PRE-START-UP
Filling System-Heating Heaters
Fill system with water. Purge all air from the system
using purge valve sequence. After system is purged of
air, lower system pressure. Open valves for normal
system operation, fill system through feed pressure.
Manually open air vent on the compression tank until
water appears, then close vent.
5. 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.
6. Check around unit for debris and remove com-
bustible products, i.e. gasoline, etc.
Domestic Hotwater Heaters
Purge all air from system before lighting heater. This
can be normally be accomplished by opening a down-
stream valve.
Pre-Start-Up Check
1. Verify heater is filled with water.
Inspect Venting System:
2. Check system piping for leaks. If found, repair
immediately.
1. Check all vent pipe connections and flue pipe
material.
3. Vent air from system. Air in system can interfere
with water circulation.
2. Ensure vent terminations are installed per code
and are clear of all debris or blockage.
4. Purge air from gas line up to heater.
INITIAL START-UP
Tools Needed
For Your Safety Read Before
Lighting
WARNING: If you do not follow these instructions
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
•
•
•
•
•
•
•
One 12-0-12, 24” scale manometer
Two 6-0-6, 12” scale manometers
7/16” open end wrench
1/2” open end wrench
Screwdriver
1. This appliance does have an intermittent pilot. It is
equipped with an ignition device which automati-
cally lights the pilot. DO NOT try to light the pilot or
burner by hand.
Volt meter
3/16” Allen wrench
2. BEFORE OPERATING, smell all around the appli-
ance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will
settle on the floor.
Preparation for Start-Up
WARNING: Do not turn on gas at this time.
Check Power Supply
3. WHAT TO DO IF YOU SMELL GAS
•
•
Do not try to light any appliance.
Do not touch any electrical switch; do not use any
telephone in your building.
Immediately call your gas supplier from a neigh-
bor's telephone. Follow the gas supplier's
instructions.
If you cannot reach your gas supplier, call the fire
department.
With volt meter at incoming power check voltage
between:
•
Hot - Common (~120 VAC)
Hot - Ground (~120 VAC)
Common - Ground (< 1 VAC)
•
36
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6. Reconnect fan pressure switch tubing to original
position.
WARNING: If Common - Ground is > 1 VAC,
STOP: Contact electrician to correct ground failure.
Failure to do this may burn out 120V-24V
transformer, or may cause other safety control
damage or failure.
Main Burner Adjustment
1. Turn off unit.
Attach Manometers to Measure
Pressures
2. Open manual firing valve.
3. Turn on the unit, wait 15 seconds, and the igniter
should glow. Sight glass to check igniter at both
ends of the heater. Gas valve should be open after
45 seconds.
•
Attach 24" scale manometer to the first main gas
shut-off valve pressure tapping.
Attach one 12" scale manometer to the manifold
gas pressure tapping. (See gas valve detail on
page 7.)
Attach one 12" scale manometer to — Pull rubber
tube from air pressure switch off the aluminum
tubing and connect the manometer using a tee.
•
4. If burner does not light on first trial. It will retry, up
to 3 times.
•
5. Main burner ignition – check manifold gas pres-
sure at gas valve manifold pressure tap. (See gas
valve detail page 7) This should read 3.5 0.1 in.
WC for natural gas or 10.5 0.1 in. WC for LP gas.
Turn Off Main Gas Valve;
Check the Gas Supply Pressure
1. Slowly turn on main gas shut-off valve.
6. If the pressure reading differs by more than 0.1
in. WC. Remove manifold adjustment screw cover
off the pressure regulator on the gas valve, adjust
main burner manifold pressure. Replace the man-
ifold adjustment screw cap on the gas valve.
2. Read the gas supply pressure from the manome-
ter; minimum supply pressure is 5” W.C.,
recommended supply is 7” W.C. for natural gas
(minimum 11” W.C. for LP gas).
Your Hi Delta is tuned in!
3. If pressure is > 14" W.C., turn off the valve.
Safety Inspection
4. Check if the service regulator is installed and/or
adjust the service regulator.
•
•
•
Replace main gas manifold adjustment screw cap.
Check all thermostats and high limit settings.
During the following safety checks leave manome-
ters hooked up, check and record.
If other gas fired equipment are in the room and on
same gas main check all pressures on the Hi Delta
with all other equipment running.
Start-Up
•
Blower Adjustment
•
•
•
•
Check thermostats for ON/OFF operation.
Check High limits for ON/OFF operation.
While in operation, check flow switch operation
Check the low gas pressure switches (For proper
adjustment, if available, use the attached
manometers to set pressure. The scales on the
switch are approximate only); Low gas pressure
switch must be set at 5 in. WC for natural gas and
10 in. WC for LP gas.
1. Disconnect fan pressure switch tubing at plenum
and connect manometer using a tee.
2. Close all manual firing valves.
3. Turn power on.
4. Check manometers attached to fan pressure
switch. The readings should be :
•
•
High gas pressure switch (optional) at 1 in. WC
above manifold pressure.
0.5 0.1 in. WC for models 102 and 122.
0.7 0.1 in. WC for models 202, 242, 322.
If not, adjust the air shutter on the blower to attain
the correct value. (See air shutter adjustment
page 7).
Insert ignition control lockout tests as safety
check.
5. Turn power off.
37
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off immediately.
Follow-Up
·
·
Wait 5 minutes.
Reconnect combustion air pressure switch, burner
should reignite after pre-purge time delay.
•
•
Safety checks must be recorded as performed.
Turn unit on.
10. To restart system, follow lighting instructions in the
Operation section.
After main burner ignition:
•
•
•
Check Manometer for proper reading.
Cycle unit several times and recheck readings
Re-analyze with unit running record or print
results.
11. High limit control set to design temperature
requirements of system? For multiple zones: flow
adjusted as required in each zone?
•
•
Remove all Manometers and replace hose,
remove jumper, replace all gas pressure caps.
Check for gas leaks one more time.
12. Heater cycled with thermostat? Raise to highest
setting and verify heater goes through normal
start-up cycle. Reduce to lowest setting and verify
heater goes off.
POST START-UP CHECK
13. Observed several operating cycles for proper
operation?
Check off steps as completed:
14. Set room thermostat or tankstat to desired temper-
ature?
1. Heater and heat distribution units or storage tank
filled with water?
15. Reviewed all instructions shipped with this heater
with owner or maintenance person, returned to
envelope and given to owner or placed in pocket
inside front panel on heater?
2. Automatic air vent, if used, open two full turns dur-
ing venting procedure?
3. Air purged from system?
4. Air purged from gas piping? Piping checked for
leaks?
OPERATION
Operating Instructions
5. Followed start-up procedure for proper start-up?
6. Is burner flame visible?
Lighting Instructions
7. Test safety controls: If heater is equipped with a 1. STOP! Read the safety information first.
low water cut-off or additional safety controls, test
for operation as outlined by manufacturer. Burner 2. Set the thermostat to the lowest setting.
should be operating and should go off when con-
trols are tested. When safety devices are restored, 3. Turn off all electric power to the appliance.
burners should reignite after pre-purge time delay.
4. This appliance is equipped with an ignition device
8. Test limit control: While burner is operating, move
indicator on high limit control below actual heater
water temperature. Burner should go off while
which automatically lights the burner. Do Not try to
light the burner by hand.
blower and circulator continue to operate. Raise 5. Remove upper front panel.
setting on limit control above heater water temper-
ature and burner should reignite after pre-purge 6. Turn on main manual gas valve.
time delay.
7. Wait five (5) minutes to clear out any gas. Then
9. Test ignition system safety device:
smell for gas, especially near the floor. If you then
smell gas. STOP! Follow the steps in the safety
information on the front cover. If you do not smell
gas, go to next step.
·
·
·
Turn on manual gas valve. Turn power on.
Set thermostat to call for heat.
When the unit is in operation. Disconnect combus-
tion air blower pressure switch, burner should go
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8. Turn on all electric power to the appliance.
Yearly (Beginning of each heating
season):
9. Set thermostat to desired setting. The appliance
will operate. The igniter will glow after the pre-
purge time delay (15 seconds). After igniter
reaches temperature (45 seconds) the main valve
will open. System will try for ignition three (3)
times. If ignition is not sensed, lockout will com-
mence.
1. Annual service call by qualified service agency.
2. Visually check top of vent for soot. Call service
person to clean. Some sediment at bottom of vent
is normal.
3. Visually inspect venting system for proper func-
tion, deterioration or leakage.
10. If the appliance will not operate, follow the instruc-
tion "To Turn Off Gas To Appliance", and call your
service technician or gas supplier.
4. Check that heater area is free from combustible
materials, gasoline, and other flammable vapors
and liquids.
11. Replace access panel.
To Turn Off Gas To Appliance
1. Set the thermostat to lowest setting.
5. Check for and remove any obstruction to the flow
of combustion or ventilation air to heater.
6. Follow pre-start-up check in the Initial Start-up
section.
2. Turn off all electric power to the appliance if serv-
ice is to be performed.
7. Visually inspect burner flame. Should see light
blue flame. Visually inspect hot surface igniter for
damage, cracking or debris build-up.
3. Remove upper front panel.
4. Turn off main manual gas valve.
5. Replace access panel.
8. Check operation of safety devices. Refer to manu-
facturer’s instructions.
If heater fails to start, check for:
9. Follow oil-lubricating instructions on circulator.
Over-oiling will damage circulator. Water-lubricat-
ed circulators do not need oiling.
•
•
Loose connections, blown fuse or service switch
off?
High temperature limit switch set below heater 10. To avoid potential of severe burn, DO NOT REST
water temperature?
Thermostat set below room temperature?
Gas not turned on at meter or heater?
HANDS ON OR GRASP PIPES. Use a light touch
- return piping will heat up quickly.
•
•
•
Incoming gas pressure less than 6 in. WC for nat- 11. Check blower and blower motor. Clean and oil as
ural gas, 11 in. WC for LP gas.
necessary.
12. Check for piping leaks around circulators, relief
valves and other fittings. Repair, if found. DO NOT
use petroleum based stop leak.
MAINTENANCE
Suggested Minimum
Maintenance Schedule:
Daily:
1. Check that heater area is free from combustible
materials, gasoline, and other flammable vapors
and liquids.
Regular service by a qualified service agency and
maintenance must be performed to ensure maximum
heater operating efficiency. Maintenance as outlined
below may be performed by the owner.
2. Check for and remove any obstruction to the flow
of combustion or ventilation air to heater.
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Products causing contaminated combustion air:
Monthly:
•
•
•
•
•
•
•
•
•
•
•
•
spray cans containing chloro/fluorocarbons
permanent wave solutions
1. Check for piping leaks around circulators, mixing
valves, relief valves, and other fittings. If found,
repair at once. DO NOT use petroleum-based stop
leak compounds.
chlorinated waxes/cleaners
chlorine-based swimming pool chemicals
calcium chloride used for thawing
sodium chloride used for water softening
refrigerant leaks
2. Visually inspect burner flame.
paint or varnish removers
3. Visually inspect venting system for proper func-
tion, deterioration or leakage.
hydrochloric acid/muriatic acid
cements and glues
antistatic fabric softeners used in clothes dryers
chloride-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
adhesives used to fasten building products
... and other similar products.
4. Check air vents for leakage.
Quarterly:
•
•
1. Check relief valve. Refer to manufacturer’s
instructions on valve.
Areas causing contaminated combustion air:
2. Test low water cut-off, if used. Refer to manufac-
turer’s instructions.
•
•
•
•
•
•
•
•
•
•
dry cleaning/laundry areas and establishments
metal fabrication plants
beauty shops
3. Clean screen and air filter in intake.
refrigeration repair shops
photo processing plants
auto body shops
plastic manufacturing plants
urniture refinishing areas and establishments
new building construction
remodeling areas.
APPENDIX
Inside Combustion Air
Contamination:
All heaters experience some condensation during Check for areas and products as listed above before
start-up. The condensate from flue gas is slightly installing heater. If found:
acidic. In most cases the pH level is not harmful to
vents or drains. When combustion air is contaminated
by vapors from products in areas listed below, the
acidic levels in the condensate increase. Higher acidic
levels attack many materials, including stainless steel
commonly used in high efficiency systems.
•
•
remove products permanently, OR
provide outdoor combustion air.
The heater can use special corrosion-resistant non-
metallic intake vent material. You may, however,
choose to use outside combustion air for one or more
of these reasons:
•
•
•
installation is in an area containing contaminants
listed below which will induce acidic condensation.
you want to reduce infiltration into your building
through openings around windows and doors.
you are using AL29-4C stainless steel vent pipe,
which is more corrosion-resistant than standard
metallic vent pipe. In extremely contaminated
areas, this may also experience deterioration.
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LIMITED PARTS WARRANTY COMMERCIAL BOILERS
TYPE HI-DELTA SIZES 122 TO 322
MODELS H AND WH
SCOPE:
Raypak, Inc. (“Raypak”) warrants to the original owner that all parts of this boiler 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.
HEAT EXCHANGER WARRANTY:
Domestic Hot Water
Five (5) years from date of boiler installation. Includes copper heat exchanger with bronze and cast iron waterways.
Ten (10) years from date of boiler installation. Includes only cupro nickel heat exchanger with bronze or cast iron waterways.
Space Heating (Closed Loop System)
Ten (10) years from date of boiler installation. Includes both cupro nickel and copper heat exchanger with bronze or cast iron waterways.
Thermal Shock Warranty
Twenty (20) years from date of boiler installation against “Thermal Shock” (excluded, however, if caused by boiler operation at large
changes exceeding 150°F between the water temperature at intake and boiler temperature, or operating at boiler temperatures exceeding
230°F).
ANY OTHER PART MANUFACTURED BYRAYPAK:
One (1) Year warranty from date of boiler installation, or eighteen (18) months from date of factory shipment based on Raypak’s records,
whichever comes first.
SATISFACTORY PROOF OF INSTALLATION DATE, SUCHAS INSTALLER INVOICE, IS REQUIRED. THIS WARRANTYWILL
BE VOID IFTHE BOILER RATING PLATE ISALTERED OR REMOVED.
ADDITIONAL WARRANTY EXCLUSIONS:
This warranty does not cover failures or malfunctions resulting from:
1. Failure to properly install, operate or maintain the boiler in accordance with our printed instructions provided;
2. Abuse, alteration, accident, fire, flood and the like;
3. Sediment or lime buildup, freezing, or other conditions causing inadequate water circulation;
4. High velocity flow exceeding boiler 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 boiler system;
7. Failing 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 found satisfied. The replacement part will be warranted for
only the unexpired portion of the original warranty. Raypak makes no warranty whatsoever on parts not manufactured by it, but Raypak
will apply any such warranty as may be provided to it by the parts manufacturer.
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 his Raypak distributor for instructions regarding the claim. If either is not available, contact Service Manager,
Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA 93030 or call (805) 278-5300. 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 OFALLOTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUTNOTLIMITEDTO IMPLIED WARRANTIES OF MERCHANTABIL-
ITYAND FITNESS FORAPARTICULAR PURPOSE. RAYPAK’S SOLE LIABILITYANDTHE SOLE REMEDYAGAINSTRAYPAK WITH RESPECtTTO
DEFECTIVE PARTS SHALLBEAS PROVIDED IN THIS WARRANTY. ITISAGREED THAT RAYPAK SHALLHAVE NO LIABILITY, WHETHER
UNDERTHIS WARRANTY, OR IN CONTRACT,TORT, NEGLIGENCE OR OTHERWISE, FORANYSPECIAL, 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 rate of manufacture plus
thirty (30) days.
_____________________________________________________ ______________________________________________
Name of Owner
_____________________________________________________ ______________________________________________
Address Address
Name of Dealer
_____________________________________________________ ______________________________________________
_____________________________________________________ ______________________________________________
Model No.
Serial No.
Date of Installation:_____________________________________ Date of Initial Operation: ___________________________
CORPORATE HEADQUARTERS:
RAYPAK, INC. • 2151 Eastman Avenue • Oxnard • CA 93030 •(805) 278-5300 • FAX (800) 872-9725 • www.raypak.com
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Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA 93030 (805) 278-5300 Fax (805) 278-5468
Litho in U.S.A.
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