TriangleTube Prestige Excellence Manual

*INS
*INST TA
AL LL LA AT TION ION A AN D M N D M A AI N I N T TE N E N A AN C E * NCE*
M
MA AN U N U A AL L
2007-19 Manual Prestige Excellence_IWH
prestige
Excellence
Indirect Water Heater
Revised 3/6/08
WARNING • Before proceeding with installation and operation, read entire manual care-
fully.Failure to do so can cause injury or property damage.
• When receiving the PRESTIGE Excellence, any claims for damage or
shortage in shipment must be filed immediately against the transporta-
tion company by the consignee.
IMPORTANT
•Warranty Registration Card must be filled out by the customer and mailed
within thirty (30) days of installation in order to gain warranty coverage.
• Retain and affix this manual near the water heater for future reference
•Installation and service should only be performed by a qualified installer or
service technician.
• Installations and service should be performed by a license plumber or gas
fitter in the Commonwealth of Massachusetts.
Part 2 of 2

Tables of Contents
Product & Safety Information ..................................1-2
Pre-Installation ..............................................3-4
Installation - Domestic Piping
Temperature & Pressure (T&P) Relief Valve . . . . . . . . . . . . . . . . . .5
Drain Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Automatic Air Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Thermal Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Water Hammer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Vacuum Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
General Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Domestic Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Thermostatic Mixing Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Recirculation Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Storage Tank Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Installation - Piping Diagrams ..................................9-10
Water Heater Start-Up
Filling the Inner (Domestic Water) Tank . . . . . . . . . . . . . . . . . . . . .11
Filling the Outer (Boiler Water) Tank . . . . . . . . . . . . . . . . . . . . . . .11
Setting the Thermostat Mixing Valve ........................11
General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Program Access of the MCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Activating the Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-14
DHW Storage Temperature Setting . . . . . . . . . . . . . . . . . . . . . . . . .15
Setpoint Value Addition for DHW . . . . . . . . . . . . . . . . . . . . . . . . . .15
DHW ON Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16
DHW OFF Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-17
Additional DHW Feature
Frost Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Factory Setting for Parameters . . . . . . . . . . . . . . . . . . . . . . . . .18
Water Heater Maintenance
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Filling Water Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Draining Water Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-20
Draining Inner (Domestic Water) Tank . . . . . . . . . . . . . . . . . . . . . . .20
Draining Outer (Boiler Water) Tank . . . . . . . . . . . . . . . . . . . . . . . . .20
i

Tables of Contents
Replacement Parts ...........................................21
Water Heater Specifications
Excellence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Performance
Excellence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
ii

Product & Safety Information
Indicates the presence of a hazardous situa-
tion which, if ignored, will result in death, seri-
ous injury or substantial property damage.
Indicates a potentially hazardous situation
which, if ignored, can result in death, seri-
ous injury or substantial property damage.
Indicates a potentially hazardous situation
which, if ignored, may result in minor
injury or property damage.
Indicates special instructions on installation,
operation or maintenance, which are impor-
tant to equipment but not related to person-
al injury hazards.
Indicates recommendations made by
Triangle Tube for the installers which will
help to ensureoptimum operation and
longevity of the equipment
BEST PRACTICES
NOTICE
CAUTION
WARNING
DANGER
The following terms are used throughout this manual to bring attention to the presence of poten-
tial hazards or important information concerning the product.
Definitions
1
Triangle Tube reserves the right to modify the technical specifications and components of its prod-
ucts without prior notice.
NOTICE

Product & Safety Information
Bacteria can develop in the domestic water
system if certain minimum water tempera-
tures are not maintained.
HOT WATER CAN SCALD!
Water temperature over 125ºF can cause
severe burns instantly or death from scalds.
• Children, disabled and elderly are at highest
risk of being scalded.
-Never leave them unattended in or
near shower, bathtub or sink.
- Never allow small children to use a hot
water faucet or draw their own bath.
•To avoid any potential scald hazard or if
codes require specific water temperatures at
the hot water faucet, the installer must:
- Install the factory supplied thermostatic
mixing valve at this appliance and ensure it
is working property
and
-Set the domestic storage temperature to the
lowest temperature which satisfies your
hot water needs.
- Feel and adjust water temperature before
bathing or showering.
- Water drained from the system drain
valves may be extremely hot.
TO AVOID INJURY:
- Make sure all connections are tight.
- Direct water flow away from any person.
Protection must be taken against exces-
sive temperature and pressure!
TO PROTECT AGAINST EXCESSIVE
TEMPERATURE AND PRESSURE
• Check if the Temperature & Pressure
(T&P) relief valve is installed in the loca-
tion provided (DHW Side).
• Check if the 30 psi relief valve supplied
is installed in the location provided (CH
Side)
• To avoid injury, install the relief devices
to comply with local code requirements.
To prevent damage to the inner tank, the
Installer must:
• Always fill inner tank prior to outer
tank and always drain outer tank prior
to inner tank.
• Relieve primary system pressure
below 15 psig prior to draining inner
tank.
CAUTION
CAUTION
DANGER
WARNING
2

3
Codes Compliance
Installation of the Excellence Water Heater must
conform with the instructions in this manual and
where applicable:
• local, state, provincial, and national codes,
laws, regulations and ordinances.
• in Canada - CAN / CGA B149.1 or B149.2
Installation Code.
Excellence water heater is exempt from ASME
Section VIII, Division 1 Code construction per
Interpretation VIII-86-136. Check with local codes
for applicability.
The Excellence water heater will absorb less
than 200,000 BTU/hr when domestic water
outlet temperature is 194ºF and boiler water
supply temperature is 240ºF. Listed outputs
arebased on ASME Section VIII
Interpretation VIII-1-86-136.
Where recommendations in this manual differ
from local, or national codes, the local or national
codes take precedence.
Codes Restrictions
Single wall heat exchanger in the Excellence water
heater complies with National Standard Plumbing
Code, provided that:
– boiler water (including additives) is practically
non-toxic, having toxicity rating or class of 1,
as listed in Clinical Toxicology of Commercial
Products, and
–boiler water pressure is limited to maximum
30 psig by approved relief valve.
Single wall heat exchangers are permitted under the
Uniform Plumbing Code - Paragraph L3.2. and L3.3
if they satisfy all of the following requirements.
1. The heat transfer medium is potable water or
contains only substances which are recog-
nized as safe by the U.S. Food and Drug
Administration.
2. The pressure of the heat transfer medium is
maintained less than the normal minimum
operating pressure of the potable water system
Exception: Steam complying with sec-
tion #1 above.
3. The equipment is permanently labeled to
indicate that only additives recognized as
safe by the FDA shall be used in the heat
transfer medium.
Other heat exchanger designs may be permitted
where approved by the Administrative Authority.
Operating Restrictions
• Maximum DHW outlet temperature is
120ºF, when factory supplied mixing valve
is installed.
• Maximum boiler water temperature is
194ºF.
• Maximum working pressure for inner
(domestic water) tank is 150 psig.
•Maximum working pressure for outer
(boiler water) tank is 30 psig.
•pH and chloride limits for water heaters
are:
-chloride, less than 150 mg/l
- pH value min. 6 - max. 8
Any water conditioning system must be
installed and maintained in accordance with
manufacturer’s specifications.
Do not install the Excellence water heater on
any application if the boiler piping contains
non-oxygen barrier tubing or if the boiler
piping is considered an “open system”.
Exposing the outer tank of the Excellence
water heater to oxygen contamination will
lead to premature tank failure and denial of
the warranty.
NOTICE
NOTICE
NOTICE
Pre-Installation

4
Pre-Installation
Locating Water Heater
• The Excellence is not intended for outdoor
installations.
• Locate Excellence so that any leakage from the
tank or water connections will not cause dam-
age to the area adjoining the water heater or to
lower floors in the structure.
Recommended Clearances
The Excellence is approved for zero clearance to
combustibles, excluding vent and boiler piping.
- Vent & Boiler Piping - 1/4 inch from com-
bustible materials.
Toprovide serviceability to the unit it is rec-
ommended that the following clearances be
maintained:
Top boiler jacket - 24 inches.
Front - 24 inches.
Bottom boiler piping - 24 inches.
Rear -0inches
Sides - 6 inches
When maintaining zero clearance or less
than recommended clearances, some prod-
uct labeling may become hidden and
unreadable
When installing the Excellence in a confined
space, sufficient air must be provided for
proper combustion and venting and to
allow, under normal operating conditions,
proper air flow around the product to main-
tain ambient temperatures within safe limits
to comply with the National Fuel Gas Code
NFPA 54 - latest edition. Reference the
Excellence Boiler Manual for additional
guidelines.
Residential Garage Installations
When installing the Excellence in a residential
garage, the following special precautions per NFPA
54/ANSI Z223.1 must be taken:
- Mount the unit with a minimum 18 inches
above the floor level of the garage. Ensure
the burner and ignition devices / controls
are no less than 18 inches above the floor
level.
-Locate or protect the unit in a matter so it
cannot be damaged by a moving vehicle.
WARNING
NOTICE
BEST PRACTICES

5
Installation - Domestic Piping
Temperature & Pressure (T&P) Relief Valve
To reduce risk of excessive pressures and tem-
peratures in the water heater, install tempera-
ture and pressure protective equipment
required by local codes, but no less than a com-
bination temperature and pressure relief valve
certified by a nationally recognized testing lab-
oratory that maintains periodic inspection of
production of listed equipment or materials, as
meeting the requirements for Relief Valves and
Automatic Gas Shutoff Devices for Hot Water
Supply Systems, ANSI Z21.22. This valve must
be marked with a maximum working pressure
of the water heater.
• The Excellence water heater must be protected
with a T&P relief valve.
•Size the Excellence T&P relief valve by the
following specifications, unless they conflict
with local codes: 3/4” NPT with an AGA
Rating of 100,000 BTU/hr (Watts 100XL-8 or
equivalent).
For proper operation of the T&P and to pre-
vent the T&P from activating due to boiler
water temperature, use a T&P relief valve
with extended element. A 8” minimum
length is recommended.
Standard Installation
• Install T&P relief valve in the Auxiliary con-
nection located behind the air vent on the top of
the water heater as shown Fig. 2 page 8.
Commonwealth of Massachusetts Installation
Follow this procedure for jurisdictions requiring a
vacuum breaker to be installed on the domestic
cold water inlet.
• Install the T&P in the run (straight through leg)
of a tee located at the domestic hot water out-
let. Use a long element T&P relief valve, as
shown in Fig. 3 page 8.
T&P Relief Valve Discharge Piping
T&P relief valve discharge piping must be:
- made of material serviceable for tempera-
tures of 250ºF or greater.
- directed so that hot water flows away from
all persons.
- directed to a suitable place for disposal.
- installed so as to allow complete draining
of the T&P relief valve and discharge line.
T&P relief valve discharge piping must not be:
-excessively long. Using more than 2
elbows or 15 feet of piping can reduce dis-
charge capacity.
- directly connected to a drain. Terminate
discharge piping within 6” from drain.
Refer to local codes.
- plugged, reduced or restricted.
- subject to freezing.
Do not install any valve between T&P relief
valve and tank connection or on T&P relief
valve discharge piping. Do not plug T&P
relief valve or discharge piping. Improper
placement and piping of T&P relief valve
can cause severe personal injury, death or
substantial property damage.
WARNING
NOTICE
CAUTION

6
Installation - Domestic Piping
Drain Valve
Drain valve and fittings are supplied by others.
Standard Installation
• Install a tee connection at the domestic cold
water inlet, as shown in Fig. 4, pages 9.
• Pipe the drain piping with drain valve from
the tee connection to:
- a suitable place for disposal
or
- terminate within 12” of the floor
Commonwealth of Massachusetts Installation
•Thread a 3/4” close nipple onto the
Auxiliary connection and insert an open-
end dip tube into the Auxiliary connection
on top of water heater. As shown in Fig. 3,
page 8.
• Install a 3/4” NPT elbow to the Auxiliary
connection.
•Pipe the drain piping with drain valve from
the elbow connection to:
-asuitable place for disposal
or
-terminate within 12” of the floor
Automatic Air Vent
1. Install automatic air vent provided using
suitable pipe dope or tape in the air vent con-
nection as shown in Fig. 2 and 3 page 8.
2. Unscrew vent cap on air vent one full turn.
Leave cap unscrewed one turn for normal
venting.
Thermal Expansion
If a backflow preventer, check valve or pressure
reducing valve is piped on cold water supply piping
of water heater,install an expansion tank on cold
water supply line to prevent normal thermal expan-
sion from repeatedly forcing open T&P relief valve.
T&P relief valve is not intended for constant
duty, such as relief of pressure due to
repeated normal system expansion. Correct
this condition by installing a properly sized
expansion tank in domestic water system.
Refer to expansion tank manufacturer’s
installation instructions for proper sizing.
Water Hammer
Dishwashers, clothes washers and fast-closing pos-
itive shut-off valves incorporated in the system all
contribute to creating water shock. Install a water
hammer arrester to prevent damage to pipes and
appliances. See device manufacturer’sinstructions
for application and installation.
Water hammering within the domestic pip-
ing system can cause premature failure of
the inner tank of the water heater.This type
of failureis NOT covered under warranty.
Vacuum Breaker
Installing a vacuum breaker on the domestic cold
water outlet will prevent damage to the inner tank
if a negative pressure is developed in the domestic
supply line. See manufacturer’s instructions for
application and installation of the vacuum breaker.
General Piping
• For domestic water piping diagrams, see pages
9and 10.
• All plumbing must meet or exceed all local,
state and national plumbing codes.
• Use pipe dope or tape suitable for potable
water systems.
•Use isolation valves to isolate system compo-
nents.
NOTICE
CAUTION

7
Installation - Domestic Piping
Domestic Piping
• Union on domestic hot water outlet should be
piped at a higher elevation than domestic water
drain valve. This will make draining the water
heater easier.
• Use dielectric unions or couplings to protect
hot and cold water fittings from corrosion
when connecting dissimilar materials such as
copper and galvanized iron pipe.
• If copper pipe is used for domestic water con-
nections, first solder pipe to a threaded adapter
and then screw adapter into cold water inlet on
top of Excellence. Cold Water Inlet contains
an internal plastic dip tube which can be dam-
aged by heat from soldering.
Do not apply heat to the cold water inlet
when making sweat connections to water
heater. Sweat tubing to adapter before fit-
ting adapter to cold water inlet of heater.It
is imperative that no heat be applied to the
cold water inlet, as it contains a non metal-
lic dip tube.
•When the water supply pressure is higher than
70 psig, it is recommended to install a pressure
reducing valve on cold water supply line to
prevent water loss through T&P relief valve.
Thermostatic Mixing Valve
The Excellence is factory supplied with a thermo-
static mixing valve with built-in check valve. The
mixing valve must be installed as shown in Fig. 1.
The operating range of the thermostatic mixing is
90ºF to 120ºF.
For applications with a domestic recirculation
loop, the recirculation pump should be controlled
by an aquastat. The maximum recommended set-
ting of the aquastat is 10ºF lower than the thermo-
static mixing valve setting.
For proper operation of the thermostatic
mixing valve and to prevent potential scald-
ing hazards, the recirculation loop should
be controlled by an aquastat. DO NOT use
continuous recirculation.
Recirculation Piping
• Recirculation piping must be installed in the
cold water inlet as shown Fig. 5, page 9.
•A stainless steel or bronze circulator is recom-
mended.
Storage Tank Application
For applications requiring large volumes of domes-
tic hot water in a relative short period, the installer
may include a storage type tank (see Fig. 6 page 10)
in the domestic piping.
The installer must:
1. Relocate the thermostatic mixing valve from
the Excellence to the outlet of the storage
tank.
2. Provide recirculation from the storage tank
back to the Excellence using a bronze type
circulator.Maximum recommended recircu-
lation flow rate is 1 gpm.
DANGER
NOTICE
ColdHot
Adapter
Check Valve
Mixed
Fig. 1: Mixing Valve Assembly

Installation - Domestic Piping
8
DHW Aux.
Connection
DHW
Cold Water
Inlet
Air Vent
Connection
DHW
Hot Water
Outlet
T&P Valve
(Drain Piping Not Shown)
Fig. 2: Standard Installation of the T&P Relief Valve
Drain
Dip Tube
3/4” Brass Close
Nipple
DHW Aux.
Connection
DHW
Hot Water
Outlet
DHW
Cold Water
Inlet
Air Vent
Connection
3/4” Brass
Tee
T&P Valve
(Drain Piping Not Shown)
Fig. 3: Commonwealth of Massachusetts Installation

9
Cold Water
Inlet
61
12" min.
Heat Trap
Loop
(Optional)
12" Min.
Heat Trap
Loop
(Optional)
5
4
9
8
3
M
H
C
Installation - Piping Diagrams
1. Shut-offvalve
2. Flow check valve
3. Mixing valve with check valve
4. Vacuum Breaker *
5. Unions
6. Backflow preventer or pressure reducing valve(*)
7. Circulator (controlled by aquastat)
8 Domestic drain valve
9. Thermal expansion tank (potable)
(*) Optional devices may be required by local codes.
Standard Installation Domestic Piping Excellence Series
Fig. 4:
Standard Installation Domestic Piping with Optional Recirculation Excellence Series
Fig. 5:

Installation - Piping Diagrams
10
1. Mixing valve with check valve
2. Flow check valve
3. Shut-off valve
4. Backflow preventer or pressure reducing valve(*)
6. Thermal expansion tank
7. Circulator (controlled by aquastat)
8 Domestic drain valve
9. Vacuum Breaker *
(*) Optional devices may be required by local codes.
12" Heat trap
Optional
recirculation
8
3
N
C
M
1
Cold water
inlet
61
1
9
4
2
7
2
7
Domestic Piping with Optional Storage Tank
Fig. 6:

11
Filling the Inner (Domestic Water) Tank
• Never use the Excellence unless inner and
outer tank of the water heater is completely
filled with water.
• Inner tank of the Excellence water heater
must be completely filled and pressurized
before pressurizing outer tank.
1. Close domestic water drain valve.
2. Open domestic water isolation valves on the
water heater piping.
3. Vent air from inner (domestic water) tank by
opening nearest hot water faucet. Fill domes-
tic water tank completely by allowing water to
run until there is a constant flow of water.
4. Close hot water faucet.
Filling the Outer (Boiler Water) Tank
• Never use the Excellence unless inner and
outer tank of the water heater is completely
filled with water.
•Inner tank of the Excellence water heater
must be completely filled and pressurized
before pressurizing outer tank.
Reference the PRESTIGE Excellence boiler
manual for boiler start-up and guidelines for
filling the boiler.
If antifreeze is used in boiler water,check concen-
tration. Boiler water (including additives) must be
practically non-toxic, having toxicity rating or class
of 1, as listed in Clinical Toxicology of Commercial
Products.
Do not use automotive, ethylene glycol or
petroleum-based antifreeze. Do not use any
undiluted antifreeze. This can cause severe
personal injury, death or substantial property
damage.
Setting the Thermostatic Mixing Valve
The thermostatic mixing valve controls the
outlet hot water temperature delivered to
the faucets.
POTENTIAL SCALD HAZARD. The mix-
ing valve must be installed on the
Excellence. Removal of the mixing valve
will create a potential scald hazard resulting
in severe personal injury or death.
If any adjustment needs to be made on the valve:
- Use a L-Key to remove the set screw securing
the knob to the valve.
-Remove the knob and lock ring from the valve.
-Replace the knob and adjust the set tempera-
ture of the valve to the desired temperature.
To calibrate the outlet temperature, allow
the water to run for approximately 2 min-
utes and measure the water with a ther-
mometer. Toadjust the valve setting, rotate
the knob clockwise to decrease the water
temperature or counter-clockwise to
increase the water temperature.
- Once the desired temperature is achieved,
remove the knob and refit the lock ring onto the
valve’s“Mix” marking.
- Locate the tab on the inner face of the knob
into the retainer in the locking ring. Secure the
knob with set screw.
NOTICE
WARNING
NOTICE
WARNING
NOTICE
CAUTION
CAUTION
Water Heater Start-Up

12
Water Heater Start-Up
HOT WATER CAN SCALD!
• Water temperatures over 125ºF can cause
severe burns instantly, or death from scalds.
• Feel water before bathing or showering.
• Consumer Product Safety Commission and
some states recommend temperatures settings of
130ºF or less. Setting thermostat higher than
130ºF will increase risk of scald injury and
cause severe personal injury or death.
• Water heated to a temperature suitable for
clothes washing, dish washing and other sanitiz-
ing needs will scald and cause permanent injury.
• Children and elderly, infirm, or physically
handicapped persons are more likely to be
injured by hot water. Never leave them unat-
tended in or near a bathtub. If anyone using hot
water in the building fits this description, or if
state laws or local codes require certain water
temperatures at hot water faucets, take special
precautions.
-Install the factory supplied automatic mix-
ing valve at water heater and/or install a
point of use mixing valve at each hot water
faucet, bath and shower outlet. Selection
and installation of point of use mixing
valves must comply with valve manufactur-
er’s recommendation and instructions.
-Use the lowest practical temperature setting.
- Check water temperature after any adjust-
ment of the mixing valve.
General Notes
•Household water usage patterns will affect
water temperature at any faucet or shower.
Occasionally check temperature at each point
of use, then adjust the mixing valve setting
accordingly. Always recheck temperature after
adjusting the mixing valve.
• Lowering the automatic mixing valve as indicat-
ed in these instructions will reduce water tem-
perature levels. Consult your installer or service
technician.
DANGER

13
Water Heater Start-Up
Important Information - Read Before
Proceeding
This document is intended to be used by a
factory trained and qualified heating con-
tractor or service technician only. Read all
instructions within this document and with-
in the PRESTIGE Excellence Boiler
Installation and Maintenance Manual,
before proceeding. It is recommended to
follow the procedures in the steps given,
skipping or missing procedural steps could
result in severe personal injury, death or
substantial property damage.
Program Access of the MCBA CONTROL
Toadjust the factory parameter setting of the
Prestige MCBA Control, the installer must enter
into the Parameter menu of the control.
Do not attempt to revise any other control
parameter setting except those listed in this
supplement. Perform only those parameter
revisions described in this supplement.
Failure to comply could result in erratic or
unreliable operation of the Prestige result-
ing in severepersonal injury, death or sub-
stantial property damage.
For additional information on revising the
Prestige MCBA Control Module operational
parameter settings, reference the Prestige
Control Supplement.
Activating the Access Code
To enter the parameter listing of the MCBA con-
trol, the installer must enter the service code as fol-
lows:
1. Press and hold the MODE button
2. Continue holding the MODE and press STEP
button until
STBY appears and hold both STEP
and MODE buttons for 2 to 3 seconds.
The display should read
CODE
3. Release the STEP and MODE buttons on the
control panel.
4. Press STEP once.
The display should read C_ XX (XX should
be a random number from 00 to 99)
5. Press the + or - button to change the display
number
C_ XX to read C_54 . Press and release
the + or - to change the display one number at
a time. Press and hold the + or - to rapidly
change the display number.
6. When the display reads C_54 press STORE to
save the service code. The display C_54
should flash when the code is entered and
saved.
After the service code is entered press the MODE
button until the display shows
PARA . At this point
the installer can access the parameters required for
application.
Once in the parameter mode, press the STEP
repeatedly to reach the appropriate parameter set-
ting. The display should show the following
sequence, as the STEP button is press repeatedly:
Press STEP once- 1140
Press STEP x2 - 2_01
Press STEP x3 - 3_01
Press STEP x4 - 4186
NOTICE
WARNING
WARNING

14
Press STEP x5 - P_10
Press STEP x6 - P_11
Etc......
After Parameter 4 the display will show P followed
by a two-digit number that increases with each
press of the STEP button.
The actual parameter values displayed on
the unit may vary depending on the applica-
tion. The parameter sequence will always
occur in the order shown.
Once a particular parameter is reached, release the
STEP button. Wait a second and the display will
show the current setting for that parameter in the
right two display digits.
To Change a Parameter Setting
Use the + or - button to change the value of
the display.
Press the STORE button once to save the
change.
If a parameter setting is changed from the
factory default and the STORE button is not
pressed to save the setting, the MCBA mod-
ule will automatically store the setting after
15 minutes. Ensure all parameters settings
are either factory default or revised based
on the application. Review all parameters
settings on page 18 when completed and
prior to commission of the boiler. Failure to
comply could result in erratic or unreliable
operation of the Prestige boiler.
Once a parameter setting value has been
revised and stored, if the STEP button is
pressed for the next parameter setting the
value setting of that parameter will appear.
The display will not show P_XX of the next
sequential parameter. The sequence of
parameters may be scrolled through, as the
display will roll over from parameter 46 to
parameter 1.
If sequential parameters are being revised
and since the display will not show P_XX of
the sequential parameter, it is recommended
to press and hold the STEP button to scroll
through the entire list of parameters before
making any additional changes to avoid any
potential confusion.
BEST PRACTICES
NOTICE
WARNING
NOTICE
Water Heater Start-Up

Water Heater Start-Up
15
DHW Storage Temperature Setting
The parameter setting for the DHW storage tem-
perature is Parameter 1 and is accessible without
having to enter the service code.
To revise the parameter setting within the Prestige
Control Module for the set point of the Domestic
Storage temperature, the installer can access the
parameter setting by entering the Parameter Mode
PARA during normal operation, the service code is
not required.
1. Press MODE once until the display shows
PARA .
2. Press STEP until the display shows
1140 or
1XXX (where XXX is a setting other than the
factory setting).
3. Press the + or - button until the desired DHW
storage temperature setting is achieved. Press
STORE to save the setting. The display will
flash when the revised setting is accepted.
Setpoint Value Addition for DHW
To achieve the boiler operating temperature during
a DHW request for heat, the MCBA Control uses
Parameter 1 and a second parameter, Parameter 21
Setpoint Value Addition for DHW. Parameter 1
plus Parameter 21 will establish the boiler operat-
ing temperature limit.
If Parameter 1 is set below 134ºF, it is recom-
mended that Parameter 21 be reset to a higher set-
ting. The request for DHW is based on the tem-
perature reading of the DHW sensor and its rela-
tionship to Parameter 1. The operating boiler tem-
perature setpoint is based on Parameter 1 plus
Parameter 21 with a maximum operating tempera-
ture of 194ºF.
To revise the parameter setting within the Prestige
Control Module for the Setpoint Value Addition for
DHW, the installer must activate the service code
for the control module as previously described in
the Program Access of the MCBA section.
1. Enter into the service code mode.
2. Once the service code has been entered and
accepted, press MODE until the display shows
PARA .
3. Press STEP until the display shows
P_21 . This
parameter setting is the Setpoint Value
Addition for DHW parameter. After releasing
the STEP button the display will show the cur-
rent setting.
4. Press the + or - button until the desired setting
is achieved. Press STORE to save the setting.
The display will flash when the revised setting
is accepted.
5. Once the desired parameter setting has been
revised and stored within the Prestige Control
module, press RESET to exit the CODE mode.
DHW ON Differential
The MCBA Control Module has 2 differential set-
tings for the burner operation. The first differential
setting the installer has the option of adjusting, is
Parameter 38 DHW ON Differential. This parame-
ter sets the DHW storage temperature low limit. The
burner operation will respond when the DHW stor-
age temperature drops below Parameter 1 minus
Parameter 38 setting.
A minimum DHW ON Differential parameter setting
will create a quicker burner operation response to
any domestic water draws from the Excellence tank.
In contrast, a maximum DHW ON Differential set-
ting will result in a delay response to domestic
draws.
Parameter Factory Setting
Minimum
Setting
Maximum
Setting
21 46ºF 00ºF 54ºF
Parameter
Factory Setting
Minimum
Setting
Maximum
Setting
1 140ºF 68ºF 150ºF

Water Heater Start-Up
16
The DHW ON Differential setting of Parameter
38 greatly affects the production of domestic hot
water. A minimum setting of Parameter 38 could
result in a rapid response to a DHW request for
heat resulting in a potential scald hazard. It is
strongly recommended that the installer utilize
the factory supplied thermostatic mixing valve
on the DHW outlet of the Excellence. Failure to
comply could result in severe personal injury,
death or substantial property damage.
To revise the parameter setting within the Prestige
Control Module for DHW ON Differential control,
the installer must activate the service code for the
control module as previously described in the
Program Access of the MCBA section.
1. Enter into the service code mode.
2. Once the access code has been entered and
accepted, press MODE until the display shows
PARA .
3. Press STEP until the display shows
P_38 ..
This parameter setting is the DHW ON
Differential parameter. After releasing the
STEP button the display will show the current
setting.
4. Press the + or - button until the desired setting
is achieved. Press STORE to save the setting.
The display will flash when the revised setting
is accepted.
5. Once the desired parameter setting has been
revised and stored within the Prestige Control
module, press RESET to exit the CODE mode.
DHW OFF Differential
The second differential setting is Parameter 39
DHW OFF Differential. This parameter sets the
DHW storage temperature high limit. The burner
operation will cease when the DHW storage tem-
perature rises above Parameter 1 plus Parameter
39.
A maximum DHW OFF Differential parameter set-
ting will result in an extended burner firing cycle
when responding to any domestic water draws
from the Excellence. This extended burner firing
cycle could result in a final storage temperature of
the domestic hot water that is higher than the
desired storage temperature setting.
The DHW OFF Differential setting of
Parameter 39 greatly affects the production
of domestic hot water. Amaximum setting of
Parameter 39 could result in an excessive
domestic storage temperature resulting in a
potential scald hazard. It is strongly recom-
mended that the installer utilize the factory
supplied thermostatic mixing valve on the hot
water outlet of the Excellence. Failure to
comply could result in severe personal injury,
death or substantial property damage.
To revise the parameter setting within the Prestige
Control Module for DHW OFF Differential con-
trol, the installer must activate the service code for
the control module as previously described in the
Program Access of the MCBA section.
1. Enter into the service code mode.
2. Once the access code has been entered and
accepted, press MODE until the display shows
PARA .
3. Press STEP until the display shows
P_39 .
This parameter setting is the DHW OFF
Differential parameter. After releasing the
STEP button the display will show the current
setting.
DANGER
DANGER
Parameter Factory Setting
Minimum
Setting
Maximum
Setting
38 02ºF (-) 06ºF 54ºF

Water Heater Start-Up
17
4. Press the + or - button until the desired setting
is achieved. Press STORE to save the setting.
The display will flash when the revised setting
is accepted.
5. Once the desired parameter setting has been
revised and stored within the Prestige Control
module, press RESET to exit the CODE mode.
Additional DHW Features
Frost Protection
Through the use of the IDWH sensor, the Prestige
Excellence Control module will now provide a
Frost Protection feature to the water heater.
The Frost Protection feature is designed to protect
the Excellence water heater from a potential freeze
up. The protection is activated once the IDWH
sensor records a domestic temperature below 38ºF.
At that time the Prestige Excellence will begin the
burner function at low input, the circulator will
begin circulating and the internal 3-way valve will
open. The burner will continue operating at min-
imum input with circulator energized until the sen-
sor senses a domestic water temperature above
50ºF. At that point the boiler will shut down the
burner function and circulator. This feature is
always active even if the DHW operation is in the
OFF mode and cannot be overridden.
Troubleshooting
Error Codes
b_38 alternating with a status code of 9
The IDWH Sensor is not properly connect-
ed to the Prestige low voltage terminal
strip. Check for proper connections and
proper terminals
b_33 alternating with a status code of 9
The IDWH Sensor is short-circuited.
Check for proper connections to the
Prestige low voltage terminals.
Once the condition is corrected, the errors will
automatically reset and the Prestige Excellence
will return to normal operation.
Parameter Factory Setting
Minimum
Setting
Maximum
Setting
39 06ºF (-) 36ºF 54ºF