Raypak RSIT30 Manual

CATALOG NO. 3400.59 Effective: 06-01-17 Replaces: New P/N 241673 Rev. 1
Model R IT30-
R IT115
tainless teel
Indirect Fired
torage Water
Heater
IN TALLATION & OPERATING
IN TRUCTION
WARNING: If these nstruct ons are not followed exactly, a f re or explos on may result
caus ng property damage, personal njury or death.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to l ght any appl ance.
• Do not touch any electr cal sw tch; do not use any phone n your bu ld ng.
• Immed ately call your gas suppl er from a ne ghbor's phone. Follow the gas sup-
pl er's nstruct ons.
• If you cannot reach your gas suppl er, call the f re department.
Installat on and serv ce must be performed by a qual f ed nstaller, serv ce agency or
the gas suppl er.
This manual should be maintained in legible condition and kept adjacent to the heater or in a safe place for future ref-
erence.
Do not store or use gasol ne or other flammable vapors and l qu ds n the v c n ty of
th s or any other appl ance.

2
Rev. 1
Changes to: New
Additions: New
Deletions: None

3
INTRODUCTION ...............................4
AFETY WARNING ........................4
Scalding ......................................................5
Single Wall Heat Exchanger........................6
Freeze Protection........................................6
PECIFICATION PERFORMANCE
DATA ................................................7
Installation ...................................................8
Component Location ...................................8
Boiler and Circulator Sizing.........................8
Temperature & Pressure Relief Valve .........8
Plumbing .....................................................8
Controls .....................................................11
TART UP ......................................13
Purging the System...................................13
Flushing the System..................................13
Checking Circulator...................................13
Set the Thermostat to the Desired
Temperature. .............................................13
Verify the Boiler Functionality....................13
Check the Water Temperature ..................13
MAINTENANCE &
TROUBLE HOOTING .....................14
PART ............................................15
WARRANTY....................................16
CONTENT

4
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause serious
injury or property damage. Refer to this manual. For
assistance or additional information, consult a
qualified installer or service agency.
CAUTION: The recommended water temperature
for normal residential use is 120°F. The control
temperature setting does not always reflect the
outlet water temperature, which could occasionally
exceed 120°F. The variation in outlet temperature
could be based on factors including but not limited to
usage patterns and type of installation. Test your
water at the tap nearest to the indirect water heater.
AFETY WARNING
INTRODUCTION
BEFORE IN TALLATION
Raypak strongly recommends that this manual be re-
viewed thoroughly before installing your Indirect Fired
Storage Water Heater. Please review the General
Safety information before installing the unit. Factory
WARNING: Hotter water increases the risk of scald
injury. Before adjusting the water temperature
setting, read this instruction manual. Temperatures
at which injury occurs vary with the person’s age and
the length of exposure.
The slower reaction time of children, elderly, and
physically or mentally-challenged persons increases
the scalding hazard to them. It is recommended that
lower water temperatures be used where these
exposure hazards exist. Such households may
require a temperature setting less than 120°F to
prevent accidental contact with hot water.
To lower water temperature, use point-of-use
temperature limiting devices.
warranty does not apply to units that have been improp-
erly installed or operated. (Refer to the warranty at the
back of this manual.) Installation and service must be
performed by a qualified installer, or service agency. 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
www.raypak.com. Keep this manual with the water
heater after installation.
Local plumbing and electrical codes must be followed
in the installation of this indirect water heater. In the ab-
sence of a local code, use the UNIFOR PLU BING
CODE and the NFPA Code. Local codes may super-
sede instructions in this installation manual.
Thank you for purchasing a Raypak® product. We hope
you will be satisfied with the high quality and durability
of our equipment.
Product Receipt
On receipt of your unit it is suggested that you visually
check for external damage to the shipping carton. If the
carton is damaged, make a note to that effect on the Bill
of Lading when signing for the shipment. Next, remove
the water heater from the carton. Report any damage
to the carrier immediately.
On occasion, items are shipped loose. Be sure that you
receive the correct number of packages as indicated on
the Bill of Lading.
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 Re-
turned Goods Receipt number will not be accepted. All
returned goods are subject to a restocking charge.
The Raypak indirect water heater uses heat from a boiler to heat domestic water. The heat is transferred to the
water by a coil heat exchanger inside of the tank. The indirect storage tank stores the energy from the boiler for
use later. With the excellent thermal insulation in the Raypak water heater, the boiler turns on and off less often.
To maintain energy efficiency the stainless steel tank is fully insulated with 2 inches of rigid foam. The Raypak in-
direct water heater is an efficient means of heating water.
This indirect water heater has all stainless steel construction. The stainless steel tank is fully welded, pickled and
passivated. The stainless steel resists corrosion assuring a long service life.

Time/Temperature Relation-
ships in calds
The chart shown above may be used as a guide in de-
termining the proper water temperature for your home.
aximum water temperatures occur just after the boiler
has shut off. To find the water temperature being deliv-
ered, turn on a hot water faucet, place a thermometer
in the water stream and read the temperature.
5
CAUTION: The recommended water temperature
setting for normal residential use is 120°F (49°C).
Table A: Time To Produce erious Burn
Water Temp Time to Produce Serious Burn
120°F ore than 5 minutes
125°F 1-1/2 to 2 minutes
130°F About 30 seconds
135°F About 10 seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1-1/2 seconds
155°F About 1 second
When ordering parts, you must specify the model and
serial number of the water heater. When ordering under
warranty conditions, you must also specify the date of
installation.
Purchased parts are subject to replacement only under
the manufacturer’s warranty. Debits for defective re-
placement parts will not be accepted. Parts will be re-
placed in kind only per Raypak’s standard warranties.
calding
Water Temperature etting
DANGER: Safety and energy conservation are
factors to be considered when selecting the water
temperature setting of a water heater’s temperature
control. Water temperatures above 125°F can cause
severe burns or death from scalding. Be sure to read
and follow the warnings outlined on the label
pictured below. This label is also located on the
water heater.
DANGER: Households with small children,
disabled, or elderly persons may require a 120°F or
lower control (thermostat) setting to prevent contact
with HOT water.
DANGER: Hotter water increases the potential for
Hot Water SCALDS.
NOTICE: ixing valves are available for reducing
point-of-use water temperature by mixing hot and
cold water in branch water lines. Contact a licensed
plumber or the local plumbing authority for further
information.
Water temperature over 125°F can
cause instant s e v e re 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 show-
ering.
Temperature limiting valves are
available, see manual.
Table courtesy of The Shriners Burn Institute.

6
ingle-Wall Heat Exchanger
This Indirect fired water heater uses a single-wall heat
exchanger. In order for this water heater to meet the re-
quirements of the Uniform Plumbing Code, the following
requirements must be met.
1. The boiler water pressure must be limited to 30 PSI.
An approved 30 PSI relief valve must be installed
in the boiler loop.
2. The boiler heat transfer medium must be either
potable water or use fluid additives that have a tox-
icity rating of Class 1.
3. Bear a label on the system with the Wording “Cau-
tion” followed by:
a. The heat transfer medium must be water or
other nontoxic fluid having a toxic rating of
Class 1 as listed in clinical Toxicology of Com-
mercial Products, 5th ed.
b. The pressure of the heat-transfer medium must
be limited to a maximum of thirty (30) psig
(207kPa) by an approved safety or relief valve.
Freeze Protection
The water heater and water lines must be protected
from exposure to freezing temperatures. Freezing tem-
peratures can cause damage to this indirect water
heater. The unit should be located indoors.
If the water heater is to remain idle for an extended pe-
riod of time, the power and water to the boiler system
should be turned off to conserve energy and prevent a
build-up of dangerous hydrogen gas.
The water heater and piping should be drained if they
might be subjected to freezing temperatures.
After a long shut-down period, the water heater’s oper-
ation and controls should be checked by qualified serv-
ice personnel. ake certain the water heater is
completely filled again before placing it in operation.

7
PECIFICATION & PERFORMANCE DATA
Model
Tank
Weight
Empty
(lb) / (kg)
Tank
Weight
Full
(lb) / (kg)
Water
Inlet/
Outlet
Heat
Exchanger
Coil
Connections
Tank Dia.
(IN.) / (mm)
A
Tank Height
(IN.) / (mm)
B
Water
Inlet
Height
(IN.) / (mm)
C
Water
Outlet/
T&P Height
(IN.) / (mm)
D
Boiler Outlet
Height
(IN.) / (mm)
E
Boiler Inlet/
Thermostat
Height
(IN.) / (mm)
F
RSIT30 48 (21.8) 270 (123) 3/4 NPT 1 NPT 20.1” (510) 39.6” (1006) 2.2” (56) 30.9” (785) 9.4” (239) 22” (559)
RSIT40 60 (27.3) 390 (177) 3/4 NPT 1 NPT 21.8” (554) 46.9” (1141) 2” (51) 37” (940) 10.2” (259) 23.6” (599)
RSIT50 76 (34.5) 545 (248) 3/4 NPT 1 NPT 21.8” (554) 62.7” (1593) 2” (51) 52.8” (1341) 10.2” (259) 26.3” (668)
RSIT65 85 (38.6) 620 (282) 3/4 NPT 1 NPT 21.8” (554) 70.2” (1783) 2” (51) 60.3” (1532) 10.2” (259) 26.3” (668)
RSIT80 106 (48.2) 760 (345) 1 NPT 1 NPT 23.8” (605) 69.9” (1775) 1.9” (48) 60.5” (1537) 9.9” (251) 33.3” (846)
RSIT115 150 (68.2) 1100 (500) 1-1/2 NPT 1 NPT 28.9” (734) 65.8” (1671) 2.4” (61) 53” (1346) 11.5” (292) 31.9” (810)
Table B: Dimensions
Fig. 1: Dimensions
Model
Potable
Water
Volume
(gal) / (L)
Heat
Source
Water
Volume
(gal) / (L)
First Hour
Rating
(gal/hr) /
(L/hr)
Continuous
Draw
Rating
(gal/hr) /
(L/hr)
Standby
Loss
(ºF/hr) /
(ºC/hr)
Minimum
Boiler
Ouptut
(BTUH) /
(kw)
Coil
Length
( t) / (m)
Heating
Sur ace
Area
(Sq. t) /
(m2)
Heating
Coil
Flow
(GPM) /
(L/min)
Coil
Pressure
Drop at
Flow
( t wc) /
(m wc)
RSIT30 25.7 (97) 0.8 (3.0) 172 (651) 149 (564) 1.4 (0.8) 96 (328) 27 (8.2) 6.9 (0.64) 14.0 (53) 8.4 (2.6)
RSIT40 38.6 (146) 1.0 (3.8) 207 (783) 172 (651) 0.9 (0.5) 108 (369) 31 (9.4) 8.0 (0.74) 14.0 (53) 9.4 (2.9)
RSIT50 55.0 (208) 1.3 (4.9) 261 (988) 208 (787) 0.7 (0.4) 133 (454) 39 (11.9) 10.0 (0.93) 14.0 (53) 5.0 (1.5)
RSIT65 62.9 (238) 1.3 (4.9) 270 (1022) 209 (791) 0.6 (0.3 135 (461) 39 (11.9) 10.0 (0.93) 14.0 (53) 5.0 (1.5)
RSIT80 76.5 (290) 1.6 (6) 348 (1317) 276 (1045) 0.6 (0.3) 177 (604) 47 (14.3) 14.6 (1.4) 14.0 (53) 4.5 (1.4)
RSIT115 111.3 (421) 2.5 (9.5) 412 (1559) 309 (1170) 0.5 (0.3) 199 (679) 55 (16.8) 17.1 (1.6) 14.0 (53) 7.0 (2.1)
Table C: Performance Data
Note: Rating Data based on 180ºF boiler output water, potable water inlet 58ºF and outlet 135ºF. Other operating conditions are possible.
øA
20º 20º
B
WATER OUTLET
THERMOSTAT
WELL
WATER INLET
C
E
F
D
BOILER INLET
BOILER OUTLET
T&P RELIEF VALVE
- ax working pressure 150 PSIG
- ax potable water temperature 150ºF
- ax boiler temperature 210ºF

8
Installation
Component Location
For best results, the indirect water heater should be in
a central location close to the boiler. This will minimize
heat loss in the boiler piping and reduce wait times for
hot water at the point of use. The indirect water heater
must be protected from freezing temperatures.
Anode Rods
The use of anode rods is not required for this unit. The
all-stainless steel construction of this tanks minimizes
corrosion.
Boiler and Circulator izing
The ratings published in this manual for your Raypak
indirect water heater can be obtained through proper
selection of boiler output and circulator capacity. See
the performance data in Table C.
To determine the appropriate circulator for your system,
follow these three steps:
1. Calculate the pressure drop of all straight pipe and
fittings on the supply and return at the desired flow
rate.
2. Add the pressure drop from Step 1 to the pressure
drop through the indirect water heater coil (see
Table C for friction loss) to obtain a total pressure
drop.
3. Select a circulator pump that will provide adequate
flow at the total pressure drop. A pump performance
curve should accompany every circulator pump.
Temperature & Pressure Relief
Valve
This water heater requires a temperature and pressure
relief valve. The T&P relief valve is supplied by the in-
staller. This relief valve is required for safe operation of
the unit to protect from excessive temperatures and
pressures. A discharge pipe should be installed to the
relief valve. This discharge piping should terminate in a
safe location. This discharge piping must comply with
local and national plumbing codes. The piping must be
rated for 120ºF and 150 PSI.
Plumbing
A tempering valve may be required by local jurisdiction
to protect the user from scalding. Raypak recommends
the use of a tempering valve with this indirect water
heater. The tempering valve limits the water tempera-
ture at the point of use.
If local municipal codes require a backflow preventer,
an expansion tank will be required. The expansion tank
will prevent pressure build-up inside of the indirect water
heater and associated piping. The expansion tank must
be installed in the domestic water piping close to the
tank. No shutoff valve is allowed between the expansion
tank and the indirect water heater.
All water connections made to this heater should be
sealed with thread tape or pipe dope. It is important to
use two pipe wrenches when tightening connections to
this tank. One wrench should be used to support the
tank fitting from rotating; the other wrench will be used
to rotate and tighten the plumbing fitting. It is recom-
mended to use shutoff valves on this tank for servicing.
The shutoff valves should not isolate the relief valve or
expansion tank from the indirect water heater. The inlet
of the heater should be piped with a drain connection
for servicing the heater.
Several piping diagrams are shown below depicting var-
ious installation variations. Use these diagrams (Figs. 3
& 4) to help piping the indirect water heater.
This unit is not supplied with a separate drain fitting. It
is recomended that one be added to the inlet piping. Fig-
ure 2 depicts the drain valve installation.
Cold Water Supply
Fig. 2: Drain Valve Installation

9
PRV
XPAK FT
BOILER
BALL
VALVE
SYSTEM
PUMP
(S3)
SYSTEM
SENSOR BALL
VALVE
CHECK
VALVE
T&P
GAUGE
UNION
INLET
OUTLET
UNION
UNION
MIXING
VALVE
PRV
BALL
VALVE
BALL
VALVE
PRESSURE
REDUCING VALVE
BOILER
PUMP
EXPANSION
TANK
DHW
PUMP
DRAIN
AIR
SEPARATOR
PRESSURE
GAUGE
BALL
VALVE
UNION
BALL
VALVE
DRAIN
TO
BOILER
COLD
INLET
HOT
OUTLET
FROM
SYSTEM
12” MAX APART
MIX
OUTLET
MAKE UP
WATER
TO
SYSTEM
COLD
INLET
(S5) IND
TANK
SENSOR
FROM
BOILER
INDIRECT
FIRED
STORAGE
WATER
HEATER
DRAIN
DRAIN
Fig. 3: VER A MODE 2
Figure 3 depicts connecting the indirect water heater to
the system loop. This diagram also shows the optional
anti-scalding mixing valve (may be required in some ju-
risdictions). The boiler shown in this diagram is the
XPak FT. Other boilers may be used instead.

10
Fig. 4: VER A MODE 3
Figure 4 depicts connecting the indirect water heater di-
rectly to the boiler loop. Other boilers may be used in-
stead.
PRV
XPAK FT
BOILER
SYSTEM
PUMP
(S3)
SYSTEM
SENSOR
BALL
VALVE
T&P
GAUGE
UNION
INLET
OUTLET
UNION
UNION
MIXING
VALVE BALL
VALVE
PRV
BALL
VALVE
(S6) IND
SUPPLY
SENSOR
BOILER
PUMP
EXPANSION
TANK
DHW
PUMP
DRAIN
CHECK
VALVE
PRESSURE
GAUGE
BALL
VALVE
UNION
BALL
VALVE
DRAIN
TO
BOILER
COLD
INLET
HOT
OUTLET
FROM
SYSTEM
12” MAX APART
MIX
OUTLET
MAKE UP
WATER
TO
SYSTEM
COLD
INLET
(S5) IND
TANK
SENSOR
FROM
BOILER
INDIRECT
FIRED
STORAGE
WATER
HEATER
DRAIN
DRAIN