IBC Intergas DC 15-95, DC 15-96, DC 20-125, DC 33-160 User Manual
DC Series Boilers / Water Heaters
DC 15-95, DC 15-96, DC 20-125, DC 33-160
(Natural Gas or Propane)
WARNING: If the information in this manual is not followed exactly, a re or
explosion may result causing property damage, personal injury, or loss of life.
Do not store or use gasoline or other ammable vapours and liquids or other
combustible materials in the vicinity of this or any other appliance.
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 nearby phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
Installation and service must be performed by a qualied installer, service
agency or the gas supplier.
This Manual is also available in French - contact IBC or visit our web site www.ibcboiler.com
INSTALLATION AND OPERATING INSTRUCTIONS
www.ibcboiler.com
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
WARNING
If the information in this
manual is not followed
exactly, a re or explosion
may result causing property
damage, personal injury, or
loss of life.
SAFETY CONSIDERATIONS
Installation, start-up and servicing of IBC boilers / water heaters must
be done with due care and attention, and should only be performed by
competent, qualied, licensed and trained heating technicians. Failure to
read and comply with all instructions and applicable National and local
codes may result in hazardous conditions that could result in property
damage and injury to occupants which in extreme cases might result in
death.
HAZARDS & PRECAUTIONS
DANGER
Points out an immediately
hazardous situation which
must be avoided in order to
prevent serious injury or
death.
WARNING
Points out a potentially
hazardous situation which
must be avoided to prevent
serious injury or death.
CAUTION
Points out a potentially
hazardous situation which
must be avoided to prevent
possible moderate injury and/
or property damage
NOTE
Points out installation,
maintenance and operation
details that will result in
enhanced eciency, longevity
and proper operation of your
boiler / water heater.
BEST PRACTICES
Points out recommendations
for better installation.
Supplied with the boiler / water heater - The IBC boiler / water heater is
shipped with an accessory parts kit consisting of the following items:
• 1 x Wall Mounting Bracket, IBC Part # 250-647
• 1 x Condensate Assembly
• 1 x Pressure Relief valve, 3/4NPT, 30psi
• 1 x Outdoor Temperature Sensor
• Air Vent and Relief Valve ttings
• 1 x Automatic Air Vent
• 4 x Lag Screws, Hex Head, Zn-Pl, 1/4 x 2-1/2 and Washers
• 1 x DC Installation & Operating Instructions
• 1 x DC/HC User Manual
• 1 x DC/HC Controller Manual
2
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
SPECIFICATIONS
SPECIFICATION DC 15-95 DC 15-96 DC 20-125 DC 33-160
CSA Input (Natural Gas or Propane) – MBH 15 - 95 15 - 96 20 - 125 33 - 160
CSA Input (Natural Gas or Propane) – KW 4.4 - 27.8 4.4 - 28.1 5.6 - 36.6 9.7 - 46.9
CSA Output – MBH 14.4 - 85.5 14.5 - 85.9 18.6 - 110.8 30.4 - 140.0
CSA Output - KW 4.2 - 25.0 4.3 - 25.2 5.4 - 32.5 8.9 - 41.0
DHW - CSA Input (Natural Gas or Propane) MBH
DHW - CSA Input (Natural Gas or Propane) - KW 4.4 - 27.8 4.4 - 28.1 5.6 - 36.6 9.7 - 36.3
A.F.U.E 95% 96% 95% 94%
Min Gas Pressure (Nat. Gas or Propane) – inch
w.c.
Max Gas Pressure (Nat. Gas or Propane) – inch
w.c.
Power (120Vac/60Hz) - Watts @ full re with
internal pump
Weight (empty) – lbs/Kg 97 / 44 105 / 48 105 / 48 105 / 48
Pressure Vessel water content – USG/Liters 0.37 / 1.4 0.5 / 1.9 0.5 / 1.9 0.5 / 1.9
Max boiler ow rate - USgpm 10 10 11 11
Min boiler ow rate - USgpm 2 2 3 3
Max Operating Pressure – Space Heating Coil -
psig
Max Operating Pressure – Domestic Hot Water
Coil - psig
Approved installation altitude - ASL 10,000 ft 10,000 ft 10,000 ft 10,000 ft
Ambient Temperature – Low (°F/°C) 32 / 0 32 / 0 32 / 0 32 / 0
Ambient Temperature – High (°F/°C) 122 / 50 122 / 50 122 / 50 122 / 50
Max relative humidity (non-condensing) 90% 90% 90% 90%
Min water Temperature - Space Heating (°F/°C) 50 / 10 50 / 10 50 / 10 50 / 10
Max water Temperature – Space Heating (°F/°C) 194 / 90 194 / 90 194 / 90 194 / 90
Min water Temperature – Domestic Hot Water
(°F/°C)
Max water Temperature – Domestic Hot Water
(°F/°C)
Min ow rate to activate DHW heating - USgpm 0.5 0.5 0.5 0.5
Max ow rate DHW heating - USgpm 3.0 3.0 4.0 4.0
DHW delivery: @70°F/ 39°C temp. rise gpm 2.5 2.5 3.2 3.2
Max equivalent vent length 3" (each side) 120' 120' 120' 120'
Max equivalent vent length 2" (each side) 35' 35' 35' 35'
* Natural Gas boilers / water heaters require a Propane conversion kit (see page #3-2, Table 10) to be ordered separately if converting a Natural Gas boiler / water
heater to Propane. Propane (LP) boilers / water heaters require a Natural Gas conversion kit (see page #3-2, Table 10) to be ordered separately if converting a
Propane boiler / water heater to Natural Gas.
† boilers / water heaters are shipped with 30 psig pressure relief valve
15 - 95 15 - 96 20 - 125 33 - 124
5 5 5 5
14 14 14 14
128 128 130 164
43.5 43.5 43.5 43.5
150 150 150 150
104 / 40 104 / 40 104 / 40 104 / 40
149 / 65 149 / 65 149 / 65 149 / 65
INSTALLATION AND OPERATING INSTRUCTIONS
3
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
DANGER
HOT
BURN
Water temperture over 125°F (52°C) can cause severe burns instantly
°
or death from scalds.
Children, disabled, and elderly are at highest risk of being scalded.
°
See instruction manual before setting temperature at boiler.
°
Feel water before bathing or showering.
°
Temperature limiting valves are available, see manual.
°
WATER HEATER INSTALLATION GUIDELINES
WARNING
This boiler must be installed in accordance with local codes, if any; if not follow the National
°
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code,
CAN/CSA B149.1, as applicable.
Failure to correctly install and operate this appliance can result in severe personal injury
°
or death.
The water heater, if utilized, shall have a pressure relief valve installed within 6” [152mm] of the
°
DHW HOT outlet connection.
Refer to the Boiler User’s Manual before operating relief valve.
The water heater, if utilized, requires a pressure relief valve identified with the ASME V or HV
°
symbol and set to relieve at or below 150psi of domestic water pressure and a minimum
relieving capacity of 125,000 Btu/hr with 3/4” NPT threads. For safe operation of the water
heater, the relief valve must not be removed from its designated point of installation or plugged.
For complete information refer to installation manual.
°
Read and follow warnings and instructions.
°
CAUTION
Hotter water increases the risk of scald injury. Before changing the temperature setting, see
°
instruction manual.
ADJUSTABLE TEMPERATURE SETTING
Press the and hold for 2 seconds, then press again. When the LED is lit, the
°
Domestic Hot Water temperature can be set.
4
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
CONTENTS
1.0 INSTALLATION....................................................1-1
1.1 GENERAL ...................................................1-1
1.2 CODE REQUIREMENTS........................................1-2
1.3 LOCATION ...................................................1-2
1.4 EXHAUST VENTING AND AIR INTAKE.............................1-3
1.5 CONDENSATE REMOVAL......................................1-16
1.6 WATER PIPING - SPACE HEATING ..............................1-20
1.7 DOMESTIC HOT WATER SYSTEM...............................1-28
1.8 GAS PIPING.................................................1-32
1.9 ELECTRICAL CONNECTIONS ..................................1-33
2.0 BOILER / WATER HEATER SYSTEMS AND OPERATION..................2-1
2.1 GENERAL ...................................................2-1
2.2 CONTROL ...................................................2-2
2.3 INSTALLER INTERFACE ........................................2-2
2.4 TANKLESS DOMESTIC HOT WATER MODES.......................2-4
2.5 ADDING DOMESTIC HOT WATER STORAGE.......................2-4
2.6 SPACE HEATING..............................................2-5
2.7 SEQUENCE OF OPERATION ....................................2-6
3.0 STARTUP AND COMMISSIONING ....................................3-1
3.1 LIGHTING AND SHUTTING DOWN THE BOILER ....................3-1
3.2 PRIOR TO START-UP ..........................................3-2
3.3 COMMISSIONING .............................................3-2
3.4 FUEL CONVERSION ...........................................3-4
4.0 MAINTENANCE ...................................................4-1
4.1 BOILER / WATER HEATER MAINTENANCE ........................4-1
5.0 TROUBLESHOOTING ..............................................5-1
5.1 PRELIMINARY CHECKS ........................................5-1
5.2 ELECTRONIC COMPONENTS ...................................5-2
6.0 DIAGRAMS.......................................................6-1
6.1 PARTS DIAGRAMS ............................................6-2
6.2 WIRING DIAGRAMS ...........................................6-6
INSTALLATION AND OPERATING INSTRUCTIONS
5
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
The Installer must carefully read this manual to ensure that all installation
details can be adhered to. Special attention is to be paid to clearances and
access, vent travel and termination, gas supply, condensate removal and
combustion air supply.
DANGER
Should overheating occur
or the gas supply fails to
shut o, do not turn o or
disconnect the electrical
supply to the pump. Instead
shut o the gas supply at
a location external to the
appliance.
WARNING
Do not use this boiler / water
heater if any part has been
under water. Immediately call
a qualied service technician
to inspect the boiler / water
heater and to replace any part
of the control system and
any gas control that has been
under water.
CAUTION
Care must be taken to
properly size the boiler /
water heater for its intended
use. Prolonged full re run
time, over-sizing or undersizing, and incorrect ow
rates through the boiler /
water heater can lead to
increased maintenance
costs, equipment stress and
premature failure.
The Installer should do a pre-installation check the to ensure that the
following precautions can be observed:
• The boiler / water heater should be installed in areas where the combustion
air source is not subject to chemical fouling or agricultural vapours.
Exposure to corrosive chemical fumes such as chlorinated and/or uorinated
hydrocarbons can reduce the life of a boiler. Cleaners, bleaches, air
fresheners, refrigerants, aerosol propellants, dry-cleaning uids, de-greasers
and paint-removers all contain vapours which can form corrosive acid
compounds when burned in a gas ame. Airborne chlorides such as those
released with the use of laundry detergents are also to be avoided.
• The boiler / water heater should be located where water leakage will not result
in damage to the area. If a location such as this cannot be found, a suitable
drain pan should be installed under the appliance. The boiler / water heater is
not to be installed above carpeting.
• At a new construction site, or during renovations, action must be taken to
protect the boiler / water heater from drywall dust or other construction related
contaminants; combustion air should be drawn from a CLEAN source (e.g.
outdoors) and the boiler / water heater should be isolated from interior dust
sources.
• When the boiler / water heater is in operation, the impact of the steam plume
normally experienced at the exhaust terminal of a condensing boiler / water
heater should be assessed. Generally, intake and exhaust pipes should
terminate at a rooftop or sterile wall location. Boiler / water heater condensate
is corrosive. Protective measures must be taken to prevent corrosion
damage to metal roofs or other metal building components in contact with
the condensate. Keep exhaust plumes well away from all building air intakes
including those of neighbouring properties.
• The exhaust outlet should be placed so as to reach 12" minimum above the
down-turned intake - to avoid exhaust re-ingestion.
• For sidewall venting options: Both the inlet and exhaust terminations should
normally be located on the same plane (side) of the building. The elevation of
both pipes can be raised in “periscope style” after passing through the wall to
gain required clearance above grade and snow level.
• Examine the condensate outlet to ensure proper disposal of condensate will
occur during operation. If condensates are to be discharged into building drain
piping materials that are subject to corrosion, a neutralization package must
be used.
• Ensure that the pressure relief valve will be installed with no valves or other
means of isolation between its inlet and the boiler / water heater. Make sure
the relief valve outlet will be piped with unobstructed piping (minimum 3/4"
diameter) to a safe discharge location.
• In locations where power supply quality varies or is unstable, installation of
surge protection and power conditioners up to and including battery back-up
uninterrupted power supply devices should be considered.
• Ensure the domestic hot water demands are considered before purchasing
the DC Series boiler / water heater. The addition of a storage tank or an IBC
Indirect Water Heater may be required in some cases.
6
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
INSTALLATION1.0
MODEL
NUMBER
DC 15-95 29.0" [736]
DC 15-96 31.3" [796]
DC 20-125 31.3" [796]
DC 33-160 31.3" [796]
HEIGHT
1.1
GENERAL
DC Series gas-red modulating boilers / water heaters are low pressure, fully
condensing units having variable input ranges (see specication chart - page 3).
The boilers / water heaters are approved as “Category IV” vented appliances
using Direct Vent (sealed combustion).
Figure 1 shows outer case dimensions and piping and electrical holes. Use this
diagram to nd a suitable location for the boiler / water heater. See also Section
1.3 Location.
DESCRIPTION
A Exhaust Outlet 3" Schedule 40
B Combustion Air 3" Schedule 40
C
Cold Domestic Water Connection
D Hot Domestic Water Connection 3/4" Male NPT
E Heating Water Inlet (Return) 1" Male NPT
F Heating Water Outlet (Supply) 1" Male NPT
G Gas Inlet 1/2" Male NPT
H Condensate Outlet 3/4" Hose
I Knock-out (3) 1/2"
DC SERIES BOILERS / WATER
HEATERS
3/4" Male NPT
Table 1: Connections
Figure 1a: Dimensions / Connections for DC Series Figure 1b: Dimensions / Connections for DC Series
INSTALLATION
1-1
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
1.2
1.3
WARNING
Keep boiler / water heater area
free and clear of combustible
materials, gasoline, and
other ammable vapours and
liquids.
WARNING
Combustion air must not be
drawn from areas containing
corrosive air from swimming
pools or spas, including air
directly next to outdoor pools
and spas.
WARNING
The boiler / water heater
shall not be exposed to
water leaks from piping or
components located overhead.
This includes condensation
dropping from un-insulated
cold water lines overhead.
WARNING
Ensure the gas ignition
system components are
protected from water (dripping,
spraying, rain, etc.) during
appliance operation and when
servicing (pump replacement,
condensate trap servicing,
control replacement, etc.)
CODE REQUIREMENTS
The DC 15-95, DC 15-96, DC 20-125, DC 33-160 models were tested to and
certied under CSA 4.9 / ANSI Z21.13 and Water Heater CSA 4.3 / ANSI
Z21.10.3.
The installation must conform to the requirements of the authority having
jurisdiction or, in the absence of such requirements, to the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, and/or Natural Gas and Propane Installation Code,
CAN/CSA B149.1. The installation must also conform to the Canadian Electrical
Code Part 1 CSA C22.2 No.1 and/or the National Electrical Code ANSI/NFPA
70. Where required by jurisdiction, installation must conform to the Standard for
Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1.
If there is any conict, then the more stringent will apply.
LOCATION
The DC series boilers / water heaters are designed and approved for indoor
installation (wall), with signicant exibility of location provided with the available
venting options. The boiler / water heater can be placed in an alcove, basement,
closet or utility room. Surrounding ambient conditions shall be 0°C to 50°C and less
than 90% relative humidity.
Install the boiler / water heater in areas where the combustion air source is
not subject to chemical fouling or agricultural vapours. Exposure to corrosive
chemical fumes such as chlorinated and/or uorinated hydrocarbons can
reduce the life of a boiler / water heater. Cleaners, bleaches, air fresheners,
refrigerants, aerosol propellants, dry-cleaning uids, de-greasers and paint-
removers all contain vapours which can form corrosive acid compounds when
burned in a gas ame. Airborne chlorides such as those released with the use of
laundry detergents are also to be avoided. Similarly, ensure any direct vent air
source is not adjacent to a clothes dryer exhaust terminal. Avoid agricultural
applications where the boiler / water heater and/or the intake air source are
aected by ammonia and/or dust.
Locate the boiler / water heater where water leakage will not result in damage to
the area. If a location such as this cannot be found, a suitable drain pan should
be installed under the appliance. The boiler / water heater is not to be installed
above carpeting.
Boiler / Water Heater Weight – approximately 105 lb / 44 kg. For support fasteners,
use the supplied 4 x 1/4" x 2-1/2" long lag screws. Installer to supply 1/4" bolts if
metal mounting systems are used. Fasteners are to be attached to solid material
capable of supporting the combined weight of the boiler / water heater and piping
assembly components.
Other factors aecting potential mounting sites:
• Ensure minimum clearance requirements for combustible materials (see
Table 2) are satised.
• Minimum 24" clearance at the front and 10" above is recommended for
adequate servicing. Check local codes for additional access and service
clearance requirements.
•
At a new construction site, or during renovations, action must be taken to
protect the boiler / water heater from drywall dust or other construction
related contaminants; combustion air should be drawn from a CLEAN
source (e.g. outdoors) and the boiler / water heater should be isolated
from interior dust sources.
1-2
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
WARNING
Exposed water piping and
associated components
(relief valves, circulators, etc.)
should not be in contact with
combustible materials. Check
local codes for required
clearances and/or provide
adequate insulation.
WARNING
DO NOT MOUNT THIS
BOILER / WATER HEATER
TO HOLLOW WALL
STRUCTURES - The
combined weight of the
boiler, its water contents
and associated piping
components can exceed 150
pounds. Fasteners must be
rated for this strain, and must
be rmly anchored into solid
material that will support this
weight.
DISTANCE FROM
SURFACE
Front 2" 24"
Rear 0" 0"
Left Side 1.5"
Right Side 4"
Top 2" 24"
Bottom 8" 24"
Table 2: Clearance from boiler / water heater cabinet
A minimum distance below the boiler / water heater of 11" is required to
provide clearance for the supplied condensation trap assembly. More
clearance will typically be required to accommodate associated water and
gas piping.
COMBUSTIBLE
SURFACES
RECOMMENDED DISTANCE
FOR INSTALLATION AND
SERVICE
6" (labels may be dicult to read with
reduced clearance)
6" (labels may be dicult to read with
reduced clearance)
Installers are to take all
necessary precautions
to avoid injury during the
installation of this boiler /
water heater.
1.4
DANGER
Do not common vent the DC
modulating series boilers /
water heaters with any other
existing or new appliance.
INSTALLATION
Figure 2: Wall mounting of boiler
EXHAUST VENTING AND AIR INTAKE
It is important to carefully plan the installation to ensure the appropriate
vent materials, travel and termination decisions are incorporated. Specic
attention is warranted to manage the impact of the steam plume normally
experienced at the exhaust terminal of a condensing boiler. Generally,
intake and exhaust pipes should terminate at a rooftop or sterile wall
location, to maximize customer satisfaction. Keep exhaust plumes
well away from all building air intakes including those of neighbouring
properties.
1-3
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
WARNING
Venting, condensate drainage,
and combustion air systems
for all IBC boilers / water
heaters must be installed in
compliance with all applicable
codes and the instructions of
their respective Installation
Manuals.
Inspect nished vent and air
piping thoroughly to ensure
all are airtight and comply
with the instructions provided
and with all requirements of
applicable codes.
Failure to comply will result
in severe personal injury or
death.
All venting must be installed in accordance with the requirements of the
jurisdiction having authority: in Canada, Part 8, Venting Systems of the B149.110 Code and any other local building codes are to be followed. In the USA
the National Fuel Gas Code, ANSI 223.1, latest edition, prevails. Where there
is a discrepancy between the installation instructions below, and the code
requirements, the more stringent shall apply.
Provisions for combustion and ventilation air in accordance with the section “Air
for Combustion and Ventilation,” of the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, or Clause 8.2, 8.3 or 8.4 of Natural Gas and Propane Installation Code,
CAN/CSA B149.1, or applicable provisions of the local building codes.
NOTE
The minimum wall thickness
for venting is 1” and the
maximum wall thickness for
venting is 14”.
NOTE
A water heater shall not be
connected to a chimney ue
serving a separate appliance,
designed to burn solid fuel.
Figure 3: Basic exhaust vent assembly
IMPORTANT
When an existing boiler / water heater is removed from a common venting
system, the common venting system is likely to be too large for proper venting of
the appliances remaining connected to it.
When re-sizing any portion of the common venting system, the common venting
system should be re-sized to approach the minimum size as determined using
the appropriate tables in the National Fuel Gas Code, ANSI Z223.1 - latest
edition. In Canada, use the B149.1 Installation Code - latest edition.
At the time of removal of an existing boiler the following steps shall be followed
with each appliance remaining connected to the common venting system placed
in operation, while the other appliances remaining connected to the common
venting system are not in operation.
• Seal any unused opening in the common venting system.
• Visually inspect the venting system for proper size and horizontal pitch and
determine there is no blockage or restriction, leakage, corrosion and other
deciencies which could cause an unsafe condition.
• Insofar as is practical, close all building doors and windows and all doors
between the space in which the appliances remaining connected to the
common venting system are located and other spaces of the building. Turn
on clothes dryers and any appliance not connected to the common venting
system. Turn on any exhaust fans, such as range hoods and bathroom
exhausts, so they will operate at maximum speed. Do not operate a summer
exhaust fan. Close replace dampers.
1-4
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
• Place in operation the appliance being inspected. Follow the lighting
instructions. Adjust thermostat so appliance will operate continuously.
• After it has been determined that each appliance remaining connected to the
common venting system properly vents when tested as outlined above, return
doors, windows, exhaust fans, replace dampers and any other gas-burning
appliance to their previous conditions of use.
• Any improper operation of the common venting system should be corrected
so the installation conforms with the National Fuel Gas Code, ANSI Z223.1 latest edition. In Canada, all installations must conform with the current CAN/
CGA - B149.1 Installation Code and/or local codes.
1.4.1 Applications
All DC Series boilers / water heaters must be installed as a Direct Vent venting
system. The combustion air must be piped in from the outdoors and connected
directly to the boilers / water heaters combustion air connection. See section
1.4.7 for air intake piping requirements.
1.4.2 Exhaust Vent Material
WARNING
Covering non-metallic vent
pipe and ttings with thermal
insulation shall be prohibited.
EXHAUST VENT MATERIAL – CANADA
Only PVC, CPVC, Polypropylene (PPs) or stainless steel* vent component
systems approved under ULC-S636 Standard for Type BH Gas Venting Systems
are to be used. Ensure compliance with exhaust temperature limitations for
the respective materials. The vent temperature is limited with the use of a ue
temperature sensor and software to ensure the maximum temperature of the
PVC venting material is not exceeded.
• ULC-S636 PVC
• ULC-S636 CPVC
• ULC-S636 PPs
EXHAUST VENT MATERIAL – USA
PVC, CPVC, PPs venting materials are approved for use with this boiler /
water heater in the USA. The vent temperature is limited with the use of a ue
temperature sensor and software to ensure the maximum temperature of the
PVC venting material is not exceeded. PVC venting material shall be certied to
Sch. 40 ASTM D1785 or D2665. CPVC venting material shall be certied to Sch.
40 ASTM F441.
INSTALLATION
1-5
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
WARNING
Do not mix venting materials
from dierent Manufacturers.
These venting materials are
designed to be installed as
part of a complete system.
Failure to comply may result
in severe personal injury or
death.
Do not use ABS or any cellular core pipe for exhaust venting.
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel®
(polyphenolsulfone) in venting systems shall be prohibited.
The boiler / water heater oers 3" venting connections. Fittings are to be used
to adapt to the appropriate diameter (see Vent Travel below). CPVC or PVC
Exhaust Venting is to be inserted directly into the 3" female stainless steel tting
on left side of the boiler’s top panel. The clamp must be tightened to secure the
pipe into the tting. If PPs materials are being used, ensure the proper adapter is
used to transition from the Schedule 40 diameter to the PPs size diameter.
For PPs material, use the 3" transition/ adaptor tting (Sch 40 to PPs) oered
by the respective PPs manufacturers Centrotherm / InnoueTM (their part #
ISAA0303) or M&G Dura Vent /PolyPro (#3PPS-AD). For PPs material exposed to
outdoor weather, follow the venting suppliers’ recommendations on UV protection.
Combustion air piping is inserted directly into the 3" female stainless steel tting
on the right (see Section 1.4.7).
Venting shall be supported in accordance with applicable code.
1.4.3 Vent Travel
CPVC or PPs (Rigid Single Wall) piping is the standard venting option; with
this, the DC Series boilers / water heaters, for example, can be vented up to
120 equivalent feet from the vent termination using 3". The actual vent travel
allowance is reduced for ttings in accordance with Table 3. – e.g. for the models
listed above using 6 x 90º CPVC long sweep elbows, the maximum lineal
measure of pipe allowed using 3" pipe is 90 feet (120' – (6 x 5' = 30) = 90').
WARNING
Fully insert the approved
venting material into the
boilers / water heaters
exhaust outlet and tighten
clamp to ensure the venting
connection is locked in place.
For 3" Flexible PPs, up to 35 actual lineal feet are allowed in a nominally vertical
orientation (>45°). The equivalent length of 3" Flexible PPs shall be computed
using a multiple of 1.4:1, e.g. 35' x 1.4 = 49' equivalent. The balance of the
venting allowance is still available for use with rigid PPs piping material. 2"
Flexible PPs is not allowed.
EXHAUST PIPE SIZE/FITTINGS MAXIMUM EQUIVALENT LENGTH
Schedule 40 PVC, CPVC or PPs – Allowances are for each side separately.
2" 35'
3" 120'
2" or 3" 90' Long Sweep Vent Elbow Allow 5 equivalent feet
2" or 3" 90' Short Sweep Vent Elbow Allow 8 equivalent feet
2" or 3" 45' Vent Elbow Allow 3 equivalent feet
PPS
PPs 87-90' Elbow Allow 8 equivalent feet
Flex PPS
3" PPs Flex (Max. 35) actual feet times 1.4
Table 3: Maximum Exhaust Venting Length
Exhaust venting must slope down towards the boiler / water heater with a pitch
of at least 1/4" per foot (PPs vent: follow PPs manufacturer requirements) so
condensate runs back towards the trap. Support should be provided for intake
and vent piping, particularly so for horizontal runs (follow local code).
1-6
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Figure 4
Exhaust piping is inserted directly into the 3" female stainless steel tting on the
top, left side of the boiler / water heater and run horizontally or vertically to the
outdoors. Bird screen of 1/4" stainless steel or plastic mesh (eg. IPEX System
636 drain grate for CPVC systems) is useful to guard against foreign objects.
BEST PRACTICES
To reduce the possibility of
expansion noise, allow a 1/4"
gap around the exhaust and
air intake piping.
Follow all installation instructions supplied by the pipe and tting
manufacturer.
Ensure all venting components are clean of burrs/debris prior to assembly.
Care is to be taken to avoid ingestion into the fan of PVC/ABS debris left in the
combustion air piping.
All joints must be secured using appropriate solvent cement to bond the
respective pipe material (Canada: CPVC cement approved under ULC-S636,
in accordance with its manufacturer instructions; USA: PVC (ASTM D2564),
or PVC/ABS (D2235) - Use transition glue anywhere that PVC and CPVC are
joined. Follow the cement manufacturer’s instructions closely when joining
various components. For PPs, connections shall be secured using approved
retainer clips supplied by the respective PPs manufacturer.
All vent connections must be liquid and pressure tight. Prior to ring the boiler,
and before any of the venting run is concealed by the building construction, the
installer must test the exhaust joints under fan pressure with the vent blocked,
using a soap/water solution. Installer must ll condensate trap prior to test.
1.4.4 Venting Passage Through Ceiling and Floor
• Conrm material meets local codes including re stopping requirements.
• Some local jurisdictions require a minimum initial length of pipe be exposed or
accessible for inspection.
• Pipe clearances - no IBC requirements, but best practice allows a minimum
1/4" gap around the pipe to prevent binding and expansion noise; follow local
codes.
• All piping must be liquid and pressure tight.
INSTALLATION
1-7
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
CAUTION
Vent termination clearances
in this section are
code minimum, or IBC
recommended minimum
requirements, and may
be inadequate for your
installation. Building envelope
details must be examined
carefully, and ingress of
moisture into building
structures is to be avoided.
Serious structural damage
may occur if adequate
precautions and clearances
are not allowed for.
These precautions are to be
observed for neighbouring
structures as well as for the
structure the boiler(s) are
installed in.
1.4.5 Rooftop Vent Termination
DIRECT VENT - TWO PIPE
Rooftop vents must terminate as follows:
•
The exhaust pipe can terminate in an open vertical orientation without concern
about rain inltration; rain will drain away through the condensate trap.
•
The intake air pipe is not typically drained, so it must be terminated with a downturned elbow (see Figure 5). The intake pipe does not need to penetrate the roof
at the same elevation as the exhaust; lower down the roof is OK.
• The air intake pipe may terminate on the side wall of the building as long as
the air intake terminal is turned down and the side wall of the building is not
exposed to large wind loads i.e.: prevailing winds.
• Optional bird screen may be placed in a termination tting. Leave unglued,
and hold in place with a short nipple. This permits easy access for cleaning.
• For roof top venting of multiple boiler / water heater sets, group all intake
terminals together for a common penetration through a custom cap.
Alternatively, place in the closest proximity achievable using commonly
available pipe ashing. Similarly group the exhaust pipes and place the 2
separate groups of pipes at least 3' apart (the closest intake and exhaust
pipes shall be 36" - or more - apart). Use the same 12" (minimum) vertical
separation for 2 pipe option. For alternate group terminations, contact the IBC
Factory for written guidance.
• DO NOT exhaust vent into a common venting system.
Figure 5a: Rooftop exhaust venting
with sidewall combustion air.
WARNING
Condensate can cause
corrosion of metal roong
components and other
roong materials. Check
with the builder or roong
contractor to ensure that
materials will be resistant to
acidic condensate. pH levels
can be as low as 3.0
1-8
Figure 5b: Rooftop vent terminal congurations
DIRECT VENT CONCENTRIC ROOF TOP TERMINATION
Roof Top Concentric Termination Kits are approved for use with this boiler / water
heater model. The installation of the vertical roof top concentric termination must
follow the installation instructions supplied with the venting material manufacturer.
Care must be taken to install the termination kit a minimum horizontal distance of
10' (305cm) away from any portion of the building and a minimum of 18" (46cm)
above the roof line plus the anticipated snow line. See Figure 6 and 7 on page 1-9.
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Figure 6: Vertical Concentric Termination - Two Kits
INSTALLATION
Figure 7: Vertical Concentric Termination - Single Kit
1.4.6 Sidewall Vent Termination
DIRECT VENT - TWO PIPE
Sidewall direct vent applications shall be vented as follows:
• Both the inlet and exhaust terminations should normally be located on the
same plane (side) of the building.
• The exhaust outlet is to be placed so as to reach 12" minimum above the
down-turned intake - to avoid intake re-ingestion of exhaust gases.
• The elevation of both pipes can be raised in “periscope style” after passing
through the wall, then congured as in Figure 8, to gain required clearance.
1-9
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
WARNING
It is extremely important to
maintain at least the minimum
separation of exhaust vent
termination from boiler /
water heater intake air as
illustrated in gures 5, 8 and
13. Failure to do so can result
in a dangerous situation
where exhaust gasses are
re-ingested with combustion
air. Damage to the boiler
/ water heater can result
from a failure to maintain
these separations. Improper
installation will void the
warranty.
• Use a 45° elbow on the exhaust termination to launch the plume up and o
the sidewall, for protection of wall.
• Bird screen of 1/4" stainless steel or plastic mesh eg. (IPEX System 636 drain
grate for CPVC systems) is useful to guard against foreign objects.
Figure 8: Sidewall vent termination - piping conguration
WARNING
In areas of high snowfall,
Users must be advised to
check side wall vent and
air intake terminations on
a regular basis to ensure
blockage does not occur.
DIRECT VENT SIDE WALL TERMINATION KITS
The following Side Wall Termination Kits are approved for use with the DC series
boilers / water heaters and are subject to the following restrictions. NOTE: Some
jurisdictions may not allow this type of side wall termination due to close proximity
to the neighboring properties. See Figures 9a, 9b and 10 on page 1-11.
The installation instructions, clearances and wall thickness requirements of the
approved vent termination manufactures must be followed.
Approved Side Wall Termination Kits are listed as follows: (Alternate vent
termination kits must be submitted to IBC for approval prior to installation.)
• Ipex - #196984 – 2" PVC low prole termination kit (see Figure 10).
• Ipex - #196985 – 3" PVC low prole termination kit (see Figure 10).
1-10
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Figure 9a: Horizontal Concentric Termination - Two Kits
INSTALLATION
Figure 9b: Horizontal Concentric Termination - Single Kit
Figure 10: Ipex #196984 2" PVC and #196985 3" PVC
For side venting of multiple boiler / water heater sets, group all intake terminals
together with 6" (minimum) lateral spacing, and similarly group the exhaust
pipes. Place the 2 groups on the same plane of the building (e.g. north facing
wall). Place the 2 groups of pipes at least 3' apart (the closest intake and exhaust
pipes shall be 36" - or more – apart. Use same 12" (minimum) vertical separation
(See (A) in Figure 13). Alternately, as long as the boilers / water heaters are
identical models - intake and exhaust terminals can maintain a minimum of 12" of
separation horizontally from any exhaust or inlet termination of an adjacent boiler
(See (B) in Figure 13). For alternate group terminations, contact the IBC Factory
for written guidance.
1-11
Figure 11: IBC recommended
minimum vent terminal clearance
under ventilated sot
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Figure 13: Sidewall vent termination - multiple vent piping conguration
CONCENTRIC SIDE WALL TERMINATION KITS:
Must be installed on the same horizontal line (not stacked)
Must be installed with a min separation of 12” center to center
Use caution when installing Concentric Side Wall Termination Kits when the outdoor
design temperature is below 5°F / -15°C. Possible blockage of the combustion air
intake increases when the outdoor temperature drops below this temperature.
The clearances recommended by the vent termination manufacture must be followed.
Approved Concentric Side Wall Termination Kits are listed as follows: (Alternate
vent termination kits must be submitted to IBC for approval prior to installation.)
• Centrotherm – Innoue #ICWT242 (2” termination) + ICTC0224 (2” concentric
transition to 2 pipe)
• Centrotherm – Innoue #ICWT352 (3” termination) + ICTC0335 (3” concentric
transition to 2 pipe)
• Duravent – Polypro #3PPS-HK – Horizontal Termination Kit – Concentric
• Ipex - # 197009 – 3” CPVC concentric termination kit
• Ipex - # 196006 – 3” PVC concentric termination kit
Figure 12: Prohibited installation
1-12
VENT TERMINAL CLEARANCE MINIMUMS ARE AS FOLLOWS:
The vent for this appliance shall not terminate:
1. Over public walkways; or
2. Near sot vents or crawl space vents or other areas where condensate or
vapor could create a nuisance or hazard or cause property damage; or
3. Where condensate vapor could cause damage or could be detrimental to the
operation of regulators, relief valves, or other equipment.
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
WARNING
In addition to preventing
ingestion of chemical
contaminants, care must
be taken to ensure air
intake terminals are not
installed in locations where
contamination might occur
due to ingestion of particulate
foreign material (dust, dirt
and debris).
WARNING
Intake air openings must be
congured such that rain
or other forms of moisture
cannot enter the air intake
piping system. Otherwise
serious damage to the boiler /
water heater may result.
NOTE
Care must be taken when
installing air intake piping to
ensure that a “trap” is not
formed in the piping so as to
allow a build-up of water, and
blockage of intake air.
Such blockage will result in
a boiler / water heater safety
shut-down.
CANADIAN
INSTALLATIONS1
A= Clearance above grade,
veranda, porch, deck, or
balcony
B= Clearance to window or
door that may be opened
C= Clearance to window or
door that may be opened
D= Clearance to
permanently closed window
E= Clearance to
unventilated sot
F= Clearance to outside
corner
G= Clearance to inside
corner
H= Clearance to each side
of center line extended
above meter/regulator
assembly
I= Clearance to service
regulator vent outlet
J= Clearance to
nonmechanical air supply
inlet to building or the
combustion air inlet to any
other appliance
K= Clearance to a
mechanical air supply inlet
L= Clearance above paved
sidewalk or paved driveway
located on public property
M= Clearance under
veranda, porch deck, or
balcony
1 In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code
2 In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family
dwellings and serves both dwellings.
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the oor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier.
12 in (30 cm) 12 in (30 cm)
6 in (15 cm) for appliances ≤
10,000 Btuh (3 kW), 12 in (30
cm) for appliances > 10,000 Btuh
(3 kW) and ≤ 100,000 Btuh (30
kW), 36 in (91 cm) for appliances
≤100,000 Btuh (30 kW)
* *
* *
* *
* 4 ft (1.22m) or local code,
whichever is stricter
* 4 ft (1.22m) or local code,
whichever is stricter
3 ft (91 cm) within a height 15
ft above the meter/regulator
assembly
3 ft (91 cm) *
6 in (15 cm) for appliances ≤
10,000 Btuh (3 kW), 12 in (30
cm) for appliances > 10,000 Btuh
(3 kW) and ≤ 100,000 Btuh (30
kW), 36 in (91 cm) for appliances
≤100,000 Btuh (30 kW)
6 feet (1.83 m) 3 ft (91 cm) above
7 ft (2.13 m) † *
12 in (30 cm) ‡ *
US
INSTALLATIONS
6 in (15 cm) for
appliances ≤ 10,000
Btuh (3 kW), 9 in (23
cm) for appliances >
10,000 Btuh (3 kW)
and ≤ 50,000 Btuh (15
kW), 12 in (30 cm) for
appliances > 50,000
Btuh (15 kW)
* 4 ft (1.22m) or local
code, whichever is
stricter
* 4 ft (1.22m) or local
code, whichever is
stricter
*
6 in (15 cm) for
appliances ≤ 10,000
Btuh (3 kW), 9 in (23
cm) for appliances >
10,000 Btuh (3 kW)
and ≤ 50,000 Btuh (15
kW), 12 in (30 cm) for
appliances > 50,000
Btuh (15 kW)
if within 10 ft (3 m)
horizontally
2
INSTALLATION
1-13
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
INSIDE
CORNER DETAIL
G
V
A
D
V
E
B
V
L
V VENT TERMINAL X AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
Figure 14A: Vent Terminal Clearance
H
B
C
FIXED
V
CLOSED
OPERABLE
V
F
B
B
V
B
OPERABLE
A
B
V
FIXED
CLOSED
I
X
V
J
M
V
X
K
1-14
Figure 14B: Distance Inside / outside minimums
1.4.7 “Direct Vent” Combustion Air Intake Piping
The boiler / water heater must always be installed as a Direct Vent venting
system with the combustion air piped directly from the outdoors to the boilers
/ water heaters combustion air connection. Provisions for combustion and
ventilation air in accordance with the section “Air for Combustion and Ventilation,”
of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or Clause 8.2, 8.3 or 8.4
of Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicable
provisions of the local building codes.
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Figure 15: Direct vent combustion air intake
For 3" Flexible PPs, up to 35 actual lineal feet are allowed in a nominally vertical
orientation (>45°). The equivalent length of 3" Flexible PPs shall be computed
using a multiple of 1.4:1, e.g. 35' x 1.4 = 49' equivalent. The balance of the
venting allowance is still available for use with rigid PPs piping material. 2"
Flexible PPs is not allowed.
INTAKE PIPE SIZE/FITTINGS MAXIMUM EQUIVALENT LENGTH
Schedule 40 ABS PVC, CPVC or PPs – Allowances are for each side separately.
2" 35'
3" 120'
2" or 3" 90' Long Sweep Vent Elbow Allow 5 equivalent feet
2" or 3" 90' Short Sweep Vent Elbow Allow 8 equivalent feet
2" or 3" 45' Vent Elbow Allow 3 equivalent feet
PPS
PPs 87-90' Elbow Allow 8 equivalent feet
Flex PPS
3" PPs Flex (Max. 35) actual feet times 1.4
Table 4: Maximum intake piping length.
For the inlet air – Schedule 40 PVC, CPVC, ABS or PPs piping of any type is
permitted. Use same diameter as Vent pipe.
INSTALLATION
Combustion air piping is inserted directly into the 3" female stainless steel tting
on the top, right side of the boiler / water heater and run horizontally or vertically
to the outdoors. Bird screen of 1/4" stainless steel or plastic mesh (eg. IPEX
System 636 drain grate for CPVC systems) is useful to guard against foreign
objects.
Care must be taken to ensure adequate separation is maintained between the
air intake inlet and the vent terminal. Refer to the vent terminal conguration
drawings in the Vent Termination section above.
1-15
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Support should be provided for intake piping, particularly so for horizontal runs
(follow local code).
WARNING
Fill trap with water before
boiler / water heater is rst
red to prevent exhaust
fumes from entering room.
Never operate the boiler /
water heater unless the trap is
lled with water.
Failure to comply will result
in severe personal injury or
death.
1.5
1.4.8 “Indoor Air” Combustion Air Intake
Using Indoor Combustion Air is not approved for use with the DC series boilers /
water heaters.
1.4.9 Closet Installations
For installations in a conned space (such as a closet), ventilation openings may
be needed through a door or wall to prevent excessive heat from building up
inside the space.
The boiler / water heater shall not be exposed to ambient conditions above 122°F
(50°C) or below 32°F (0°C).
CONDENSATE REMOVAL
IBC’s specied vent conguration promotes the safe drainage of moisture from
the boiler / water heater and exhaust venting without owing liquids back through
the heat exchanger.
Reliable system operation requires (1) proper design and installation of exhaust
venting to allow condensate to run back to the drain/trap; (2) acid neutralization
as appropriate. To achieve these:
WARNING
The Trap Hook must be
installed as instructed and all
trap ttings must be tightened
as instructed to prevent
leakage of ue gasses.
Failure to comply may result
in severe personal injury or
death.
1-16
Figure 17: Condensate Trap, disassembled
1. Allow for a 1/4" per foot slope back to the vent connection, with appropriate
hangers to maintain that gradient.
2. Ensure the supplied trap is correctly installed and lled with water.
3. When required, add (and maintain in good condition) a neutralization tank.
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Figure 18: Condensate trap installation
NOTE
It is the responsibility of
the installing and/or service
Contractor to advise and
instruct the end User in how
to perform the Trap cleaning
procedure, and to advise
that the Trap be checked at
least every two months and
cleaned as required.
1.5.1 Condensate Trap
A condensate trap must be installed on the drain connection at the base of the
boiler / water heater as shown in Figure 18.
1.5.2 Condensate Trap Assembly - Installation
1. Undo Drain Spout Compression Nut, remove Drain Hose from Trap Drain
Outlet. Remove Upper Compression Nut and Washer and slide over Boiler
/ Water Heater Drain Outlet (A). Insert one Trap Hook barb into the back
mounting hole.
2. Fill Trap with water, and slide Trap Body over Boiler / Water Heater Drain
Outlet (A). Swing Trap Hook (B) around the Drain Outlet connection threads.
Insert remaining Trap Hook barb into the front hole. Pull the trap slightly
downward to seat it against the hook and tighten Upper Compression nut.
3. Attach Drain Hose and tighten Drain Spout Compression Nut.
INSTALLATION
1-17
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
1.5.3 Condensate Trap Assembly - cleaning procedure
1. Turn o the power to the boiler / water heater and allow it to cool down.
2. Remove the trap from the boiler / water heater (reverse the installation
procedure above).
3. Remove the Trap Cleanout Assembly, from the Trap Body and clean and
ush the debris out.
4. Re-assemble trap components, re-ll trap, and replace on boiler / water
heater as described in the installation instructions above.
1.5.4 Further installation details
• Condensate drain must be piped to within 1" of a drain or be connected to a
condensate pump.
• Drainage line must slope down to the drain at a pitch of 1/4" per foot so
condensate runs towards the drain.
• Condensate traps should be checked every 2 months, and cleaned and
relled as necessary.
1-18
INSTALLATION AND OPERATION INSTRUCTIONS
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Figure 19: Condensate trap
disassembly for cleaning
WARNING
If condensates are to be
discharged into building drain
piping materials that are subject
to corrosion, a neutralization
package must be used.
DANGER
The water in the condensate
neutralizer can cause severe
burns to the skin. Use extreme
caution when servicing the
condensate neutralizer. Wear
protective gloves and eyewear.
Figure 20: Condensate trap drainage
CAUTION
When a condensate
neutralization package
is installed, the pH of the
condensate discharge must
be measured on a regular
schedule to ensure the
neutralizing agent is active
and eective.
INSTALLATION
Figure 21: Condensate neutralization tank
1-19
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
1.6
WATER PIPING - SPACE HEATING
1.6.1 General Piping Considerations
The DC series boilers / water heaters include a factory installed, integral
Grundfos UP 15/58 heating pump. The pump is designed to provide adequate
ow through the boiler / water heater and near boiler / water heater piping. The
pump is pre wired.
Figure 22: Overview of piping options
Primary/secondary piping or the use of a buer tank / hydraulic separator is
recommended for maximum exibility in multi zone/load applications. Piping
loads in parallel is only acceptable in systems where the minimum ow rate is
guaranteed to be higher than the minimum for the boiler / water heater and the
boilers / water heaters pump is adequate to provide the required ow rate and
pump head for the system.
There are some important details to consider however, and this section of the
Installation and Operating Manual will walk you through them so you can enjoy a
trouble-free installation.
1-20
Table 5: Boiler side pump curve
INSTALLATION AND OPERATION INSTRUCTIONS
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