ECR International | 075 | Operating instructions | ECR International 075 Operating instructions

CONDENSING
GAS BOILER
Models 075 & 100
INSTALLATION,
OPERATION &
MAINTENANCE
MANUAL
H
P/N # 240008282, REV D [10/2010]
DIMENSIONS
FIGURE 1-1 Dimensions
Vent Connection
Combustion Air
Supply Water
(E)
Gas
Connection
(G)
(F)
(D)
Return Water
(E)
User Interface
Floor
Wall Hanging
Bracket
(D)
(A)
(B)
(B)
(H)
(I)
Condensate
Drain
Alternate Gas
Connection
(F)
(C)
Alternate
Return Water
(E)
Alternate
Supply Water
(E)
Table 1 : Physical Data
Size
Width
(A)
Height
(B)
Depth
(C)
Bracket
(D)
075
/100
22-1/16"
(560mm)
35-5/8"
(905mm)
16-3/16"
(411mm)
27-1/2"
(969mm)
Water Connections
Size
(E)
Height
(F)
Gas
Connection
(G)
1-1/4"
NPT
31-1/16"
(789mm)
1/2" NPT
2
Condensate Drain
Weight
(H)
(I)
Shipping
Unit
7-1/2"
5"
140 lb
(63.5 kg)
115 lb
(51.2 kg)
TABLE OF CONTENTS
1 - Introduction ............................................................................................................................... 4
2 - Important Safety Information .................................................................................................... 5
3 - Component Listing ..................................................................................................................... 6
4 - Locating Boiler ......................................................................................................................... 10
5 - Hydronic Piping ........................................................................................................................ 12
5.2 Special Conditions ................................................................................................................... 12
5.3 Safety Relief Valve and Air Vent .................................................................................................12
5.4 Trim Piping ............................................................................................................................. 13
5.5 System Piping......................................................................................................................... 13
6 - Combustion Air And Vent Piping .............................................................................................. 18
6.2 Removal of Existing Boiler..........................................................................................................18
6.3 Materials ............................................................................................................................... 18
6.4 Pipe Installation ...................................................................................................................... 19
6.5 Termination............................................................................................................................ 19
6.6 Condensate Piping ................................................................................................................... 25
7 - Gas Supply Piping .................................................................................................................... 26
8 - Electrical Connections .............................................................................................................. 28
8.2 Line Voltage Connections.......................................................................................................... 28
8.3 Low Voltage Connections .......................................................................................................... 28
9 - Start Up Procedure ................................................................................................................... 30
10 - Operating Instructions ........................................................................................................... 34
11 - General Maintenance And Cleaning ........................................................................................ 35
12 - Ratings And Capacities ........................................................................................................... 38
13 - Trouble Shooting .................................................................................................................... 39
14 - Wiring Diagram ...................................................................................................................... 56
15 - Glossary ................................................................................................................................. 58
Appendix A - Control Module ......................................................................................................... 60
1.1 Introduction ........................................................................................................................... 60
1.2 Operation ............................................................................................................................... 60
1.3 Status Indication ..................................................................................................................... 60
1.4 Sequence of Operation ............................................................................................................. 61
1.5 Theory of Operation................................................................................................................. 63
3
1 - INTRODUCTION
1.1 Designated Use
• Hot water heating boiler.
• Indoor installation.
• Closet or alcove installation.
• Direct vent boiler.
• For use with natural gas or liquefied petroleum gases
(LP/propane).
1.2 The unit MUST NOT:
• Directly heat potable water. Indirect heating is acceptable.
• Heat water with non-hydronic heating system chemicals
present (example, swimming pool water).
• Exceed 50 psig (344 kPa) system pressure.
• Exceed 195°F (90.5°C) system design temperature.
1.3 Operational Features
• Modulating: 20-100%.
• Integral Dual Limit.
• Integral Low Water Cutoff (with test button).
• Outdoor Temperature Reset.
• Integral Multiple Boiler Control.
4
2 - IMPORTANT SAFETY INFORMATION
2.3 Installation shall conform to requirements
of authority having jurisdiction or in absence of
such requirements:
2.1 General
Boiler installation shall be completed by qualified agency.
See glossary for additional information.
• United States
! WARNING
• National Fuel Gas Code, ANSI Z223.1/NFPA 54.
Fire, explosion, asphyxiation and electrical shock
hazard. Improper installation could result in death
or serious injury. Read this manual and understand
all requirements before beginning installation.
• National Electrical Code, NFPA 70.
• Canada
• Natural Gas and Propane Installation Code,
CAN/CSA B149.1.
• Canadian Electrical Code, Part I, Safety Standard
for Electrical Installations, CSA C22.1
2.2 Become familiar with symbols identifying
potential hazards.
2.4 Where required by authority having
jurisdiction, installation shall conform to
Standard for Controls and Safety Devices for
Automatically Fired Boilers, ANSI/ASME CSD-1.
This is the safety alert symbol. Symbol alerts you to
potential personal injury hazards. Obey all safety messages
following this symbol to avoid possible injury or death.
!
Additional manual reset low water cutoff may be required.
2.5 Requirements for Commonwealth of
Massachusetts:
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in death or serious injury
Boiler installation must conform to Commonwealth of
Massachusetts code 248 CMR which includes but is not
limited to:
• Installation by licensed plumber or gas fitter.
! WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
! CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
NOTICE
Used to address practices not related to personal
injury.
5
3 - COMPONENT LISTING
20. Gas (Control) Valve (see page 8) - Delivers
3.1 Component Listing
proper quantity of fuel to Combustion Air Blower.
See section 7.
1. User Interface (see Page 8) - Displays information
regarding boiler condition. Allows adjustment of
boiler operating parameters. NOTE: Does not replace
thermostat used to control central heating space.
21. High Temperature Supply Switch (see page 8)
22. Low Water Cutoff (see page 8) - Senses inadequate
quantity of water. Turns off boiler before damage can
occur (with test button).
2. Combustion Air Inlet (2" PVC) (see page 7 & 8)
3. Return Water From Heating System (In) 1-1/4"
23. Safety Relief Valve (see page 8) - Factory supplied,
NPT (see pages 7 & 8) - Connections supplied to connection top and/or bottom of boiler.
Field installed. See section 5.
24. High Voltage Junction Box (see page 8) - For
4. Low Voltage Terminal Strip (see pages 7 & 8)
connection of 120V components. See section 8.
- Connection of all low voltage wiring, including
thermostat. See section 8.
25. Vent Connector (2" PVC) (see pages 7 & 8) - See
section 6.
5. Igniter (see page 8)
26. Gas Connection (see page 7) - Gas supply may be
6. Flame Sensor (see page 8)
piped either through top or bottom of boiler. See
section 7.
7. Sight Glass (see page 8) - Permits observation of
burner flame.
27. Bracket for Optional Wall Mount (see page 7) -
Integral to boiler. Allows optional wall mounting when
used with supplied wall mounting bracket. See section 4.
8. Burner (see page 8)
9. Combustion Chamber (see page 8)
28. Auxiliary Power Outlet (see page 7) - Convenience
outlet for condensate pump or service. Controlled by
Service Switch (29)
10. Condensate Collector (see page 8)
11. Return Temperature Sensor (see page 8)
29. Service Switch (see page 7)
12. Drain Valve (see page 8)
30. Air Vent (see page 7)
13. Heat Exchanger Ball Valve (see page 8)
31. Central Heating Pump Circuit Breaker (see page 7)
5 amp circuit breaker protects control module.
14. Supply Water Outlet to Heating System (Out)
1-1/4"NPT (see pages 7 & 8) - Connections supplied
for connecting from either top or bottom of boiler. See
section 5.
32. Control Module (see page 9)
33. Internal Access Panel (see page 9) - Gently pull
upward then forward to access control module.
Removable for access to internal components of boiler.
15. Vent Temperature Sensor (see page 8)
16. Condensate Drain (see page 8) - Boiler produces
34. Central Heating Pump Relay (see page 9)
a liquid (condensate) as a by-product of combustion.
Condensate must be piped to appropriate drain. See
section 6.
35. Transformer (see page 9) - Supplies 24V power to low
water cutoff.
17. Heat Exchanger Pump (see page 8)
36. Pressure Switch (not shown)
18. Gas Shutoff Valve (see page 8) - Fuel supply isolation
37. Test Port - (see page 8)
during servicing. See section 7
19. Combustion Air Blower (see page 8) - Delivers
38. Combustion Analysis Test Port - (see page 8)
proper quantity of combustion air, receives fuel from
gas valve, mixes air and fuel sending mixture to burner
for combustion.
6
3 - COMPONENT LISTING
FIGURE 3-1 Boiler Components
LOW VOLTAGE
TERMINAL
STRIP
COMBUSTION
AIR INLET- 2" PVC
VENT
CONNECTOR - 2" PVC
HIGH VOLTAGE
JUNCTION BOX
SAFETY
RELIEF
VALVE
AIR VENT
RETURN WATER
FROM HEATING
SYSTEM (IN)
NOTE:
See Section 5-3
For Safety Relief
Valve Piping
Instructions
BRACKET FOR
OPTIONAL WALL
MOUNT
SUPPLY WATER TO
HEATING SYSTEM
(OUT)
GAS CONNECTION
SERVICE SWITCH
AUXILIARY POWER
OUTLET
CENTRAL HEATING
PUMP CIRCUIT BREAKER
7
3 - COMPONENT LISTING
FIGURE 3-2 Boiler Components
HIGH VOLTAGE
JUNCTION BOX
VENT CONNECTOR
(2" PVC)
USER INTERFACE
COMBUSTION
AIR INLET
2" PVC
SAFETY RELIEF VALVE
RETURN WATER
FROM HEATING
SYSTEM (IN)
1-1/4" NPT
LOW
VOLTAGE
TERMINAL
STRIP
NOTE:
See Section 5
For Piping
Instructions
IGNITER
LOW WATER
CUTOFF
FLAME
SENSOR
HIGH TEMPERATURE
SUPPLY SWITCH
SIGHT
GLASS
GAS (CONTROL)
VALVE
TEST PORT
COMBUSTION
AIR
BLOWER
COMBUSTION
CHAMBER
GAS SHUTOFF
VALVE
IN-LINE
PRESSURE
SWITCH
VAPOR
COLLECTOR
(SHOWN IN OPEN
POSITION)
COMBUSTION
ANALYSIS TEST
PORT
HEAT EXCHANGER
PUMP
CONDENSATE
COLLECTOR
CONDENSATE
DRAIN 1/2" PVC
VENT
TEMPERATURE
SENSOR
SUPPLY WATER TO
HEATING SYSTEM
(OUT) 1-1/4" NPT
DRAIN
VALVE
HEAT EXCHANGER
BALL VALVE
8
RETURN TEMPERATURE
SENSOR
RETURN WATER
FROM HEATING
SYSTEM (IN)
1-1/4" NPT
3 - COMPONENT LISTING
INTERNAL ACCESS
PANEL - CLOSED
Note: To open
Lift panel up
then pull forward
Control Module
Fuse and holder
CONTROL
MODULE
INTERNAL ACCESS
PANEL -OPEN
TRANSFORMER
CENTRAL HEATING
PUMP RELAY
9
4 - LOCATING BOILER
4.1 Boiler Location Considerations
• Ambient room temperature always above 32°F (0°C) to
prevent freezing of liquid condensate.
TABLE 2: BOILER CLEARANCES
Dimension
• Approved for installation in closets and on combustible
floors. Do not install boiler on carpeting.
Top (A)
• Protection of gas ignition system components from
water (dripping, spraying, rain, etc.) during operation
and service (circulator replacement, condensate trap,
control replacement, etc.).
Left Side (B)
• Floor or wall mounting.
Combustible
Materials (1)
Service(1)(2)
0" (0 cm)
14" (36 cm)
6" (16 cm)
6" (16 cm)
Right Side (C)
0" (0 cm)
1½" (4 cm)
Front (D)
0" (0 cm)
6" (16 cm)
Back (E)
0" (0 cm)
0" (0 cm)
0" (0 cm) Floor
• Wall must be plumb and capable of supporting boiler
weight plus 60 lbs (28 kg). See Table 1.
• Floor must be level. Leveling feet allow adjustment
up to 1/4" (6 mm).
• Wall mounting. See section 4.2.
• Access to outdoors to meet minimum and maximum
pipe lengths for combustion air and vent piping. See
section 6.
Bottom (F)
0" (0 cm)
12" (32 cm) for
Bottom Piped
Combustion
Air/Vent piping
0" (0 cm)
6" (16 cm)
Hot Water Piping
½" (1.3 cm)
6" (16 cm)
(1)
(2)
Required distances measured from boiler.
Service, proper operation clearance recommendation.
• Disposal of condensate. See section 6.
• Drainage of water (or water - antifreeze solution) during
boiler service or from safety relief valve discharge. See
section 5.
• Access to system water piping, gas supply, and electrical
service. See sections 5, 7 and 8.
• Clearances to combustible materials and service
clearances. See Table 2 and figure 4-1.
• Multiple Boilers can be placed side by side, back to back
or wall mounted.
FIGURE 4-1 Clearance to Combustible Materials
A
A
E
A
C
B
D
E
C
B
FLOOR
FLOOR
10
4 - LOCATING BOILER
4.2 Wall Mounting Option
Boiler can be wall mounted using wall mounting bracket
included with unit.
• Structure must be capable of supporting boiler weight
plus 60 lbs (28 kg). See Table 1, page 2.
FIGURE 4-2 Wall Mount Bracket Engaged with
Bracket on Boiler
• Wall mount bracket has 4 slots allowing mounting on
two (2) wall studs spaced at 11½" to 16½" on center.
See figure 4-2.
Center brackets. Avoid
overhang on sides of wall
mount bracket.
• Boiler includes (4) 3/8" x 3" lag screws and (4) washers
for attaching wall mount bracket to wood studs. Field
source appropriate fasteners for other wall constructions
(masonry, concrete).
• Attach wall mount bracket level on wall.
• Boiler must engage with wall mount bracket.
• Avoid overhang on sides of wall mount bracket. Verify
boiler bracket is centered on wall bracket. See figure
4-2.
4 Slots for attaching Wall
Mount Bracket to Studs
! CAUTION
Boiler weight exceeds 115 pounds (51.2 kg). Do
not lift boiler onto wall without assistance.
11
5 - HYDRONIC PIPING
5.1 General
• Install piping in accordance with authority having jurisdiction.
! WARNING
NOTICE
• Poison hazard. Ethylene glycol is toxic. Do not
use ethylene glycol.
Use two (2) wrenches when tightening and fitting
to pipe boiler's threaded fittings. Boiler's internal
piping can be damaged if subjected to excessive
torque.
• Never use automotive or standard glycol antifreeze,
even ethylene glycol made for hydronic systems.
• Ethylene glycol can attack gaskets and seals used
in hydronic systems.
• Support system piping and safety relief valve discharge
piping. Boiler's internal piping and wall mount bracket can
be damaged if subjected to excessive weight.
• Use only inhibited proplyene glycol solutions
certified by fluid manufacturer as acceptable for
use with closed water heating system.
• Size central heating pump (and domestic hot water pump,
if used) for system requirements only. Heat exchanger
pump compensates for pressure drop through boiler
internal piping and heat exchanger.
• Thoroughly clean and flush any system that used
glycol before installing new Boiler.
• Thoroughly clean and flush system before connecting to
boiler.
• Provide user with Material Safety Data Sheet
(MSDS) on fluid used.
5.2 Special Conditions
NOTICE
• System piping exposed to freezing conditions: Use
inhibited proplyene glycol solutions certified by fluid
manufacturer for use with closed water heating system.
Do not use automotive or ethylene glycol.
Do not expose boiler and condensate piping to
freezing temperatures.
• Boiler installed above radiation level (or as required by
authority having jurisdiction). Integral low water cutoff
provided in boiler. See page 6.
• Boiler used in connection with refrigeration system.
Install piping in parallel with boiler, with appropriate
valves to prevent chilled medium from entering boiler.
FIGURE 5-1 Safety Relief Valve & Air Vent
• System piping connected to heating coils located in air
handling unit exposed to refrigerated air circulation.
Install flow control valves or other automatic means to
prevent gravity circulation of boiler water during cooling
cycle.
Safety Relief
Valve
3/4" NPT
90° Elbow
5.3 Safety Relief Valve and Air Vent
NOTICE
Boiler rated at 50 psig (345 kPa) maximum
allowable working pressure. Boiler provided with
30 psig (206 kPa) safety relief valve. Field source
safety relief valve for system pressures greater than
30 psig (206 kPa). Temperature Pressure Gauge
and Air Vent satisfactory for 30-50 psig (206-345
kPa) operation.
3/4" NPT
Close Nipple
3/4"F x 3/4"M
NPT Tee
• Install safety relief valve and air vent using pipe fittings
provided with boiler. See figure 5-1.
3/4" x 1/4" NPT
90° Elbow
• Install safety relief valve with spindle in vertical position.
• Do not install shutoff valve between boiler and safety
relief valve.
12
Air Vent
3/4 NPT
5 - HYDRONIC PIPING
• Systems with automatic fill valves require back flow
prevention device.
• Install discharge piping from safety relief valve. See
figure 5-2.
! WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
• Use ¾" or larger pipe.
• Use pipe suitable for temperatures of 375°F (191°C)
or greater.
FIGURE 5-2 Safety Relief Valve Discharge Piping
• Individual boiler discharge piping shall be independent
of other discharge piping.
• Size and arrange discharge piping to avoid reducing
safety relief valve relieving capacity below minimum
relief valve capacity stated on rating plate.
• Run pipe as short and straight as possible to location
protecting user from scalding and properly drain
piping.
• Install union, if used, close to safety relief valve outlet.
• Install elbow(s), if used, close to safety relief valve
outlet and downstream of union (if used).
• Terminate pipe with plain end (not threaded).
5.4 Trim Piping
• Supply and Return Piping
• Supply - Select either top, bottom or both.
• Return - Select either top, bottom, or both.
Check Local Codes
For Maximum
Distance To Floor
• Use second temperature pressure gauge when piping
top and bottom.
• Install brass plug(s) provided with boiler in unused
tapping(s). Use provided sealant.
• Temperature - Pressure Gauge. Install temperature
pressure gauge using nipple, bushing and tee provided
with boiler. See figure 5-3.
FIGURE 5-3 Temperature Pressure Gauge
Installation
5.5 System Piping
• Single boiler system. See figures 5-4, 5-5, 5-6, 5-7 for
general guidance. Additional considerations:
• Control system designed for single central heating
pump. Installer responsible for integration of
multiple central heating pumps.
• Control system allows domestic hot water
prioritization. Function could be lost if central
heating pump not directly connected to control
system.
• Multiple boiler system. See figure 5-8 for general
guidance. Additional considerations:
• Control system requires equivalent water
temperatures entering each boiler to properly
sequence and adjust system supply temperature.
• Install multi boiler sensor kit. See "Parts, Kits &
Optional Accessories" manual for part number.
Temperature Pressure Gauge
shown at Optional Bottom
Supply Connection to Boiler
13
5 - HYDRONIC PIPING
Piping Legend
NOTICE
Illustrations are meant to show system piping
concept only. Installer responsible for all equipment
and detailing required by authority having
jurisdiction.
FIGURE 5-4 System Piping
System
Supply
System
Return
FLOOR
Check Local Codes
For Maximum
Distance To Floor
14
5 - HYDRONIC PIPING
5-5 TWO-PIPE ZONED SYSTEM WITH VALVES
DHW
Pump
CH/System
Pump
Heat exchanger
ball valve open
(as shipped)
3/8"/10mm
Open End
Wrench
5-6 TWO-PIPE ZONED SYSTEM WITH PUMPS
DHW
Pump
Heat exchanger
ball valve open
(as shipped)
Zone
Pump
3/8"/10mm
Open End
Wrench
15
5 - HYDRONIC PIPING
5-7 SINGLE BOILER USING PRIMARY/SECONDAY PUMPING
12"/305mm Max. apart
12"/305mm
Max. apart
Existing closely
spaced tees
in primary
system loop
CH/System
Pump
Limit length
to
5'/1.6 m
Heat exchanger ball Heat exchanger
valve open
ball valves closed
3/8"/10mm Open
End Wrench
16
3/8"/10mm Open
End Wrench
5 - HYDRONIC PIPING
5-8 TYPICAL MULTIPLE BOILER PIPING - (See Multiple Boiler Guide)
CH/
System
Pump
DHW
Pump
12"/305mm Max. apart
System
Temperature
Sensor
Size common piping
according to
maximum heat
capacity of
entire system
Up to 16
boilers
All heat exchanger
ball valves closed
3/8"/10mm Open
End Wrench
(See Multiple Boiler Guide)
17
6 - COMBUSTION AIR AND VENT PIPING
their previous condition of use.
6.1 General
This boiler requires a dedicated direct vent system.
Install combustion air and vent piping in accordance
with these instructions, authority having jurisdiction,
and:
• USA - National Fuel Gas Code, ANSI 223.1/NFPA 54.
• Any improper operation of common venting system
should be corrected so installation conforms with National
Fuel Code, ANSI Z223.1/NFPA 54 and/or Natural Gas
and Propane Installation Code, CAN/CSA B149.1. When
re-sizing any portion of common venting system, common venting system should be re-sized to approach
minimum size as determined using appropriate tables in
Chapter 13 of the National Fuel Gas Code, ANSI Z223.1/
NFPA 54 and/or Natural Gas and Propane Installation
Code, CAN/CSA B149.1.
• Canada - Natural Gas and Propane Installation Code,
CAN/CSA B149.1
Vent connections serving appliances vented by natural draft
shall not be connected into any portion of mechanical draft
systems operating under positive pressure.
Install vent system in accordance with these instructions.
6.3 Materials
• See Table 4
6.2 Removal of Existing Boiler From Common
Vent System
Table 3 - Combustion Air and Vent Piping Length
When existing boiler is removed from common venting
system, common venting system is likely to be too large for
proper venting of appliances remaining connected to it.
After removal of existing boiler, following steps shall
be followed with each appliance remaining connected to
common venting system placed in operation, while other
appliances remaining connected to common venting system
are not in operation:
• Seal any unused openings in common venting system.
Combustion Air and Vent Pipe Equivalent
Length
• Visually inspect venting system for proper size and
horizontal pitch. Determine there is no blockage or
restrictions, leakage, corrosion and other deficiencies
which could cause an unsafe condition.
2” Pipe
3” Pipe
Minimum
6 ft (1.8 m)
6 ft (1.8 m)
Maximum
60 ft (18.3 m)
100 ft (30.4 m)
1 - 90° elbow = 5 ft (1.6 m)
1 - 45° elbow = 3.5 ft (1.1 m)
1- 2" x 3" adapter = 0 ft (0 m)
• When practical, close all building doors, windows, and
all doors between space in which appliances remaining
connected to common venting system are located and
other spaces of building. Turn on clothes dryer and any
appliance not connected to common venting system.
Turn on exhaust fans, such as range hoods and bathroom exhaust so they will operate at maximum speed.
Do not operate summer exhaust fan. Close fireplace
dampers.
Note: Concentric Vent Kit=5 ft (1.6m) equivalent
length
For Example: Boiler can be installed on outside wall and
vented with 1-90° elbow and 1 ft (0.30 m) of vent pipe.
• Turn on appliance being inspected. Follow lighting
instructions. Adjust thermostat so appliances will operate
continuously.
• Test for spillage at draft hood relief opening after 5
minutes of main burner operation. Use flame of match or
candle, smoke from cigarette, cigar or pipe.
• Determine each appliance remaining connected to
common venting system properly vents when tested
as outlined above. Then return doors, windows,
exhaust fans and any other gas-burning appliance to
18
6 - COMBUSTION AIR AND VENT PIPING
Table 4 - Combustion air and vent pipe fittings
must conform with the following:
Item
Material
Standards
• Minimum and maximum combustion air and vent pipe
lengths listed in Table (3). Pipe length counted from
combustion air connector to termination.
PVC schedule 40
ANSI/ASTM D1785
PVC - DWV
ANSI/ASTM D2665
CPVC schedule 40
ANSI/ASTM D1784/
F441
• Install field-sourced 2" to 3" transition, if used, in vertical
section at combustion air inlet and vent connector.
ANSI/ASTM D2241
• 90° elbows equivalent to 5.0 ft (1.6 m). 45° elbows
equivalent to 3.5 ft (1.1 m). 2" to 3" transition has no
equivalent length.
Vent Pipe
and Fittings SDR-21 & SDR-26 PVC
Pipe
Cement/
Primer
6.4 Pipe Installation
ABS-DWV
ANSI/ASTM D2661
Schedule 40
ANSI/ASTM F628
PVC
ANSI/ASTM D2564
CPVC
ANSI/ASTM F493
Schedule 40 ABS
ANSI/ASTM D2235
• Slope vent pipes minimum 1/4" per foot (21 mm/m)
back toward boiler. Support horizontal sections to
prevent sags capable of accumulating condensate.
• Support piping in accordance with pipe manufacturer's
instruction and authority having jurisdiction. In absence
of manufacturer's instruction use pipe hooks, pipe
straps, brackets, or hangers of adequate and strength
located at intervals of 4 ft (1.2m) or less. Allow for
expansion/contraction of pipe.
• IPEX is approved vent manufacturer in Canada listed
to ULC-S636.
• IPEX System 636 Cements and Primers are approved
in Canada listed to ULC-S636.
• Combustion air and vent piping must be air tight and
water tight.
DO NOT USE CELLULAR (FOAM) CORE PIPE
• Certified vent system components must NOT be interchanged with other vent systems or unlisted pipe/fittings.
! WARNING
• Canadian installations only. All venting material, primer
and glue must be listed to ULC S636.
Use of cellular core PVC for venting flue gas could
result in death, serious injury.
• Canadian installations only. First 3 ft (0.9 m) of
plastic vent pipe from vent connector must be readily
accessible for visual inspection.
! WARNING
Vent extending through exterior wall shall not
terminate adjacent to wall or below building
extensions such as eaves, balconies, parapets or
decks. Failure to comply could result in death or
serious injury.
6.5 Termination
• Terminate combustion air and vent pipes with fittings or
concentric vent kit.
• See "Parts, Kits and Optional Accessory" manual for
concentric vent kit part numbers.
• Use horizontal pipe for vent and 90° elbow for
combustion air termination when using fittings.
• Terminate combustion air and vent pipes in same
atmospheric pressure zone through exterior sidewall or
roof.
• Locate combustion air termination as far as possible
from swimming pool, swimming pool pump house, and
other sources of airborne chlorine.
• Locate combustion air and vent as required by authority
having jurisdiction.
19
6 - COMBUSTION AIR AND VENT PIPING
FIGURE 6-1
8" (21 cm)
Minimum
3" (8 cm)
Maximum
15" (38 cm)
Maximum
12" (30 cm)
Minimum
Vent
Roof
Terminations
y 3" (8 cm) Maximum horizontal
separation between combustion air
intake and vent of same appliance.
y 8" (21 cm) Minimum vertical
separation between combustion
air intake and vent of different
appliances.
y 15" (38 cm) Maximum horizontal
length of vent.
y Maximum vent/intake between
different appliances 12" (30cm).
y Maximum allowable total vertical
vent length with outside exposure
equals 10 ft.(3.05m).
y Abandoned unused masonry
chimney may be used as chaseway for combustion air and vent.
Both combustion air and vent pipe
must exit above top of chimney with
clearances as shown in figure 6-1.
Side Wall
Terminations
y 3" (8 cm) Minimum horizontal
separation between combustion air
intake and vent terminations.
y 8" (21 cm) Minimum vertical
separation between combustion air
intake and vent terminations.
y 12" (30 cm) Separation between
bottom of combustion air intake and
bottom of vent.
y Multiple terminations as shown in
6-1, 6-2, and 6-3 must be minimum
of 12” (30 cm) horizontally between
vent of one termination and air intake
of next appliance.
y Maximum allowable total outside
exposure vent length equals 10 ft.
(3.05m).
y Maintain a pitch of 1/2" per ft
(0.15m/m) back to boiler to ensure
proper condensate drainage for
horizontal runs.
Roof Line
Combustion
Air
12" (30 cm) US, 18" (46 cm)
Canada Minimum above
anticipated snow line
FIGURE 6-2
12" (30 cm)
Minimum from
overhang
3" (8 cm)
Maximum
separation
12" (30 cm) Separation
between bottom of
combustion air intake
and bottom of vent
Vent
See snow & ice
page 23
Combustion Air
FIGURE 6-3
12" (30cm)
Minimum
separation
See snow & ice
page 23
Combustion Air
Vent
20
6 - COMBUSTION AIR AND VENT PIPING
FIGURE 6-4
FIGURE 6-5
1" (2.54cm)
Maximum
1" (2.54cm)
Maximum
1"(2.54cm)
Maximum
Roof overhang
12" (30cm) Minimum
* See Note
Below
Vent
Combustion
Air
36"(0.9m) Minimum
Vent
Combustion
Air
Maintain 12"
Maintain
12"(30cm)
clearance
aboveUS
(18"(46cm)
Canada)
highest anticipated
clearance
above
snow level
or highest
grade
anticipated snow level or
grade
*Must be less than 4" or greater than 24" Horizontal distance between end bells of each air intake to prevent flue
gas recirculation.
NOTICE
Concentric termination kit reduces allowable intake/
vent piping length by 5' (1.5m) from that listed in
installation instructions.
Note: Securing strap must
be field installed to prevent
movement of termination
kit in side wall
FIGURE 6-7
OD 3½" (8.9cm) - 2" (5.0cm) kit
OD 4½" (11.4cm) - 3" (7.6cm) kit
Combustion Air
Vent
**See
Note
Combustion Air
Elbow field
supplied
2 or 3" (5.0 or 7.6cm) Diameter
PVC intake/combustion air
46-3/4"
m)(1.0m)
2" (5.0cm) Diameter
= 41"(1.2
Length
3" (7.6cm) Diameter = 47" Length (1.2m)
** Note Overall length may be modified by cutting or
extending both combustion air and vent pipes. 12" is
minimum allowable length and 60" is maximum allowable
length for this dimension. SDR-26 PVC (D2241) only may
be used for extending pipes. Do not use Schedule 40 PVC
or use couplings to extend pipes. Dimension will change if
intake/vent pipes are lengthened or shortened.
21
1"(2.54cm)
Maximum
6 - COMBUSTION AIR AND VENT PIPING
Concentric
Vent Roof
Terminations
FIGURE 6-6
y Glue inner vent pipe to prevent
recirculation.
y Maintain 12" (30 cm) US (18"(46
cm) Canada) minimum clearance
above highest anticipated snow
level. Maximum of 24"(0.61m)
above roof.
y Support must be field installed to
secure termination kit to structure.
y Elbow, roof boot/flashing field
supplied.
y Allowed Wall/Roof thickness 1/2"-30"
(1.2 - 76cm).
y Vertical concentric vent system can be
installed in unused masonry chimney.
y Contact ECR Technical Support 800325-5479, for questions regarding
installation or use.
Vent
Combustion Air
Maintain 12"(30cm) US
(18"(46cm) Canada)
clearance above highest
anticipated snow level
24" above roof
Roof boot/flashing
(field supplied)
Support
(field supplied)
Note: Support must
be field installed to
secure termination
kit to structure
Vent
22
Combustion Air
6 - COMBUSTION AIR AND VENT PIPING
Doors &
Windows
Termination must
be 12" (30.5 cm)
from or below doors,
windows or gravity
inlet.
12"
(30.5cm m)
Minimum
Less than
10' (3 m)
Minimum
Condensate
Vent gas may condense, forming
moisture, may be corrosive. Protect
building materials at vent from exhaust
of vent gas.
Forced Air
Inlet
Terminate venting system 3’ (0.9 m)
above and 10' (3.0 m) from any forced
air inlet (except boiler’s combustion
air inlet).
Termination
Termination
Forced Air
Inlet
Combustion air and vent termination
must be 12" (30.5 cm) from or below
doors, windows or gravity inlet.
3' (0.9 m)
[If located
within 10' (3 m)
of forced air
inlet]
Terminate vent system bottom,
minimum 12"(300 mm) above highest
anticipated snow level.
Grade, Snow
Avoid locations where snow may drift
& Ice
and block vent and combustion air. Ice
or snow may cause boiler to shut down
if vent or combustion air becomes
obstructed.
"L"
Corner
3' (0.9 m)
Minimum
23
Vent termination shall NOT be installed
closer than 3' (0.9 m) from inside
corner of “L” shaped structure.
6 - COMBUSTION AIR AND VENT PIPING
Keep vent termination 3’ minimum
Vegetation, (0.9m) away from vegetation. Position
termination where vent vapors will not
Plants &
damage plants/shrubs or air conditioning
Shrubs
equipment.
Termination
Vent termination US only - 4’ (1.2 m),
Meters,
Canada - 6' (1.83m) horizontally from,
Regulators, no case above or below, electric meters,
deck, porch gas meters, regulators, and relief
equipment, or under deck or porch.
3' (0.9 cm)
Minimum
Locate vent termination minimum 7'
Walkways (2.1 m) above any public walkway, with
consideration to condensate.
Locate combustion air and vent termination
People or
to prevent accidental contact with people
Pets
or pets.
Stones,
Balls,
Etc.
Position combustion air and vent
termination where it will NOT be damaged
by foreign objects, such as stones, balls,
etc.
Vapors
Position termination where vent vapors are
not objectionable.
Eddy,
Flue
Gases
Position termination so it will not be
effected by wind eddy, air born leaves,
snow, or recirculated vent gases. Give
consideration to excessive wind and locate
away from windward side of building.
7' (2.1 m)
Minimum
Multiple
Family
Dwellings
24
Vent shall not terminate directly above
paved sidewalk or paved driveway located
between two single-family dwellings serving
both dwellings.
6 - COMBUSTION AIR AND VENT PIPING
FIGURE 6-1 Condensate Drain
6.6 Condensate Piping
• Use materials acceptable to authority having jurisdiction.
In absence of such authority:
• USA - PVC or CPVC per ASTM D1785/D2845 Cement
or primer per ASME D2564 or F493.
• Canada - CSA or ULC certified PVC/CPVC pipe,
fittings and cement.
• Insert 1/2" (1.3 cm) PVC pipe through grommet in
chassis. See figure 6-1.
• Attach PVC tee provided with boiler and field sourced
piping to condensate drain vertical tee on left side of
boiler. See figure 6-1.
• Slope condensate drain pipe minimum 1/4" per foot
(21mm/m) away from boiler.
• Use condensate pump if boiler located below disposal
point. 120 VAC auxiliary power outlet can be used to
power condensate pump.
• Field source condensate neutralizing kit as required
by authority having jurisdiction or for environmentally
friendly condensate disposal.
PVC Tee (field installed)
on condensate drain
pipe
25
7 - GAS SUPPLY PIPING
7-1 Gas Connection Knockout Plate at Bottom of
Boiler
! CAUTION
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switches; do not use
any phones in your building.
Bottom cover
for Optional Gas
Connection
• Immediately call your gas supplier from
a neighbor’s phone. Follow gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the fire
department.
7.1 General
• Use piping materials and joining methods acceptable
to authority having jurisdiction. In absence of such
requirements:
• USA - National Fuel gas Code, ANSI Z223.1/NFPA 54
• Canada - Natural Gas and Propane Installation Code,
CAN/CSA B149.1
• Size and install gas piping system to provide sufficient
gas supply to meet maximum input at not less than
minimum supply pressure. See Table 5.
• Support piping with hooks straps, bands, brackets,
hangers, or building structure components to prevent or
dampen excessive vibrations and prevent strain on gas
connection. Boiler will not support piping weight.
• Use thread (joint) compound (pipe dope) suitable for
liquefied petroleum gas.
• Provide sediment trap up stream of gas valve.
7-2 Gas connection at Top of Boiler
Gas Connection Top
of Boiler
7-3 Bottom Gas Connection
Optional Bottom Gas
Connection
7.2 Conversion Kit Instructions
• See Gas Conversion Kit Instructions included with Boiler.
TABLE 5: GAS SUPPLY PRESSURE
SIZE
075/100
Maximum
Input (Btuh)
75,000
Natural Gas
Propane
Min.
Max.
Min.
Max.
3.0" w.c.
(0.7 kPa)
13.5" w.c.
(3.3 kPa)
5.0" w.c.
(1.2 kPa)
13.5" w.c.
(3.4 kPa)
Note: See Glossary - Piping Table 16
26
7 - GAS SUPPLY PIPING
!
7-4 Gas Connection Knockout Plate at Top of
Boiler
DANGER
Fire Hazard. Do not use matches, candles, open
flames, or other methods providing ignition source.
Failure to comply will result in death or serious
injury.
Top of Boiler Cover for
Gas Connection
7.3 Near Boiler Gas Piping
• Select top or bottom gas connection. To convert from
top connection to bottom connection:
• Remove bottom knockout by removing two (2)
screws. See figure 7-1.
• Disconnect gas connection by removing two (2)
screws. See figure 7-2.
• Relocate gas connection to bottom opening.
Secure with two (2) screws. See figure 7-3.
7-5 Manual Main Gas Shutoff Valve Outside
Boiler Jacket
• Relocate knockout cover to top opening. Secure
with two (2) screws. See figure 7-4.
• Install field sourced manual main shutoff valve and
ground joint union. See figure 7-5.
Manual Main Gas
Shutoff Valve
7.4 Leak Check Gas Piping
Pressure test boiler and gas connection before placing
boiler in operation.
• Pressure test over 1/2 psig (3.5 kPa). Disconnect
boiler and its individual gas shutoff valve from
gas supply system.
Option: Gas
Connection May be
Located
At Bottom of Boiler
• Pressure test at 1/2 psig (3.5 kPa) or less. Isolate boiler from gas supply system by closing
manual gas shutoff valve. See figure 7-6.
• Locate leakage using gas detector, noncorrosive
detection fluid, or other leak detection method
acceptable to authority having jurisdiction. Do
not use matches, candles, open flames, or other
methods providing ignition source.
7-6 Gas Shutoff Valve
• Correct leaks immediately and retest.
Gas shutoff valve
(shown in closed
position)
27
8 - ELECTRICAL CONNECTIONS
8.1 General
! WARNING
Electrically bond boiler to ground in accordance with
requirements of authority having jurisdiction. Refer to:
• USA- National Electrical Code, ANSI/NFPA 70.
• Canada - Canadian Electrical Code, Part I, CSA C22.1:
Safety Standard for Electrical Installations.
Electrical shock hazard. Turn OFF electrical power
supply at service panel before making electrical
connections. Failure to do so could result in death
or serious injury.
NOTICE
8.2 Line Voltage Connections (Figure 8-1)
Wiring diagrams can be found in Section 14 of this
Manual.
• Boiler
A. Provide individual 120V, 15 amp circuit (recommended) with fused disconnect or service switch,
as required by authority having jurisdiction.
B. Open High Voltage Junction Box (see Figures 3-1,
3-2) to access line voltage terminal strip.
C. Connect 120 VAC circuit to line voltage terminal
strip 120 VAC L,N,G.
8-1 LINE VOLTAGE CONNECTIONS
• Central Heating Pump, if used.
A. Isolate pump from control module if pump FLA (Full
Load Amps) exceeds 5 amps.
B. Connect pump to line voltage terminal strip CH
PUMP L,N,G.
• Domestic Hot Water Pump, if used.
A. Isolate pump from control module if pump FLA
exceeds 1.0 amp.
B. Connect pump to line voltage terminal strip DHW
PUMP L,N,G.
8-2 LOW VOLTAGE CONNECTIONS
8.3 Low Voltage Connections (Figure 8-2)
• User Interface Terminals
A. Factory wired to low voltage terminal plug USER
INTERFACE terminals
B. Optional - Remote mount user interface for
improved access.
C. Maximum wire length is 100 ft (30m) for 22 ga.
wire, or 150 ft (45m) for 18 ga. wire.
• Argus Link (Multiple boiler applications only)
• Outdoor Sensor, if used.
A. Provided with boiler in accessory kit.
B. Locate outdoor sensor to protect against wind and
direct sunlight. Mounting instructions provided with
sensor.
C. Maximum wire length is 100 ft (30m) for 22 ga.
wire, or 150 ft (45m) for 18 ga. wire.
D. Connect wires to low voltage terminal plug OUTDOOR SENSOR terminals. Wires are interchangeable.
• System Sensor (Multiple boiler applications only)
28
8 - ELECTRICAL CONNECTIONS
• Domestic Hot Water (DHW) Thermostat, if used.
A. Use temperature control with dry contacts rated
at 0.5 amps @ 120 VAC. Boiler control does not
provide power to DHW temperature control.
NOTICE
IMPORTANT: Do not apply power to DHW T-T
terminals. Dry contact only, use of isolation relay
may be necessary.
B. Maximum wire length is 330 ft (100 m) 22 gauge
wire.
C. Connect wires (interchangeable) to low voltage
terminal plug DHW T-T terminals. Wires are
interchangeable.
• Central Heating Thermostat
A. Use thermostat or boiler system control with dry
contacts related 0.5 amps @ 120 VAC. Boiler
control does not provide 24 VAC power to central
heating thermostat.
B. Locate and install thermostat per manufacturer's
instructions. Maximum wire length is 330 ft (100
m) for 22 ga. wire.
C. Connect wires to low voltage terminal plug CH T-T
terminals. Wires are interchangeable.
29
9 - START UP PROCEDURE
9.1 Fill boiler with water and purge air
NOTICE
• Fill boiler with potable water.
IMPORTANT: Condensate trap must be manually
filled with water at initial start up.
• Fill boiler and system piping with water (or antifreezewater solution, if used). See antifreeze information
page 12. Purge air from boiler using air vent. Purge
air from system piping.
9-1 Condensate Drain Assembly
• Inspect system piping and boiler connections. Repair
any leaks immediately.
9.2 Fill Condensate Trap with Water
• Disconnect collet clip from elbow. See figure 9-1.
• Disconnect tubing below elbow.
• Pour about 1 cup (237ml) of water into condensate
drain.
• Reconnect tubing to elbow with collet clip. See Figure
9-1.
1. Disconnect collet clip from
hose barb and fill Condensate
trap with water.
2. Reconnect collet clip to hose barb
before starting boiler.
30
9 - START UP PROCEDURE
9 -2 User Interface
9.3 Program Boiler Control
Key
Description
- Manual Lockout Reset
- Enter/Exit user menu
- Go to previous screen
- Select a menu item
- Confirm new parameter value
- Scroll up to next menu item
- Increase value
- Scroll down to next menu item
- Decrease value
Boiler is factory programmed with following factory default settings, Figure 9-3.
Parameters can be adjusted to suit particular
application.
Detailed explanation of each can be found in Appendix
A - Control Module.
List parameters in event of Control Module Failure to
reprogram your settings.
Control Parameter
9-3 Default Table
User
Menu
Settings
Factory Default Setting
Standard
Metric
Standard
Metric
Central Heating Setpoint
140°F
60°C
104 - 195°F
40 - 91°C
DHW Setpoint
180°F
82°C
104 - 195°F
40 - 91°C
Temperature Units
Language
°F
°F/°C
English
English/French
Boiler Address
Low Water Cutoff
Boiler
Pump Mode
Configuration
Service Reminder Status
Service Reminder Days
0
0-15
Enabled
Enable/Disabled
0
0&4
On
ON/OFF
365 Days
1- 999 Days
1
0-3
CH Mode
Installer
Menu
CH Settings
Setting Range
Warm Weather Shutdown
70°F
21°C
35-100°F
2-38°C
Reset Curve Design Temperature - Boiler
180°F
82°C
60-195°F
40-91°C
Reset Curve Design Temperature - Outdoor
25°F
-4°C
-60-32°F
-51-25°C
Reset Curve Mild Weather Temperature - Boiler
70°F
21°C
35-120°F
2-49°C
Reset Curve Mild Weather Temperature - Outdoor
70°F
21°C
35-85°F
2-29°C
Reset Curve Boiler Minimum Temperature
70°F
21°C
40-180°F
4-82°C
Reset Curve Boiler Maximum Temperature
180°
82°C
80-195°F
27-91°C
Boost Function Temperature
18°F
10°C
0-36°F
0-20°C
Boost Function Time
20 Minutes
1-120
Maximum Power CH
100%
1-100%
0
0/2
30 Minutes
1-60 minutes
DHW Mode
DHW Maximum Priority Time
* List parameters in event of Control Module Failure to reprogram your settings.
31
*Actual
Parameter
Settings
9 - START UP PROCEDURE
9.4 Boiler Start-up and Operational Test
1. Verify air is purged from hydronic piping
2. System test pumps - verify each pump is
2. Compare to boiler rating
operational
3. Verify gas piping
Size
Minimum
Maximum
075
65
85
100
90.0
110
3. Adjust rate if needed using diagram 9-3 below.
• Confirm pressure test. See section 7.3.
• Visually inspect piping to determine there are no
open fittings or ends, and all valves at unused
outlets are closed and plugged/capped.
NOTICE
Contact ECR Technical Support @ 800-325-5479 for
additional information or assistance.
• Purge air from piping
4. Check CO2. Natural gas should be between 8.5%
• Check piping and connections for leaks
immediately after gas is turned on. Shut off
gas supply and make necessary repairs if leaks
found.
and 10.0%. See Figure 9-4 Combustion air analyzer
port.
• If CO2 is low increase gas flow following figure
9-3.
4. Follow OPERATING INSTRUCTIONS to initiate boiler
• If CO2 is high decrease gas following figure 9-3.
operation. See section 10.
Propane Gas
Most propane systems do not have flow meters.
1. Check CO2. Propane should be between 9.5% and
11.0%.
• If CO2 is low increase gas flow following figure
9-3.
5. Inspect combustion air and vent piping. Verify pipe
is not leaking and terminations are unobstructed
and vent gas discharge is not a nuisance or hazard.
6. Verify boiler functions.
7. Inspect condensate disposal system. Verify
condensate flows adequately and is disposed
properly.
• If CO2 is high decrease gas flow following figure
9-3.
8. Check control module operation.
9. Check field-sourced limits, low water cutoffs, etc.
per manufacturer's instructions.
9-3 Gas Valve
9.5 Check Combustion
Natural Gas
1/4" FLAT HEAD
SCREWDRIVER
1. Measure input. English units*
• Turn off gas to all other appliances.
• Use ½, 1 or 2 cu ft dial on gas meter. Measure
time required for one or more complete
revolutions. Measure time for 1-2 minutes.
MIN
OUT
• Calculate input.
Input (MBH)
=
3600 x
cu ft
seconds
Example: Gas flow from
Meter = 2 cu ft
Measured time = 72 seconds
Rate (MBH)
=
3600 x 2 cu ft
72 seconds
• To increase gas flow turn 'throttle' left or counter
clockwise
.
• To decrease gas flow turn 'throttle' right or
clockwise
.
=
• Limit adjustment to one turn and retest.
100 MBH
*Metric - See Glossary
32
9 - START UP PROCEDURE
Verify Burner, Proper Operation
1. Inspect burner flame through Sight Glass. See
figure 9-5.
2. Operate boiler through several heating cycles,
including domestic hot water, if used. Verify proper
operation.
3. Reset control parameters to operating settings if
adjusted to allow startup and operation test.
4. Follow instructions TO TURN OFF GAS TO APPLIANCE
if boiler is not being placed into immediate operation.
5. Enter installer information on Warranty Registration
Card.
6. Gather all instructions, manuals, wiring diagrams,
warranty registration card and other supporting
information. Review with user and/or affix in
conspicuous location adjacent to boiler.
NOTICE
Combustion analyzer port is provided. After use
replace cover.
9-4 Combustion Analyzer Port
In-line Pressure Switch
Vapor Collector
Combustion Analyzer Port
Burner
Flame
Flame
9-5 Burner Flame
Look for BLUE flame
with slight YELLOW tips
evenly spaced around
burner
33
10 - OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE OPERATING
! CAUTION
! WARNING
WHAT TO DO IF YOU SMELL GAS
If you do not follow these instructions
exactly, a fire or explosion may result
causing property damage, personal injury
or loss of life.
• Do not try to light any appliance.
• Do not touch any electrical switches; do not use
any phone in your building.
• This appliance is equipped with an ignition device
which automatically lights burner. Do NOT try to
light this burner by hand.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• Before operating smell all around appliance area
for gas. Be sure to smell next to floor because
some gas is heavier than air and will settle to the
floor.
• If you cannot reach your gas supplier, call the fire
department.
10.2 TO TURN OFF GAS TO APPLIANCE
• Use only your hand to turn the gas shutoff
valve. Never use tools. If valve will not turn by
hand, do not try to repair it, call a qualified service technician. Force or attempted repair may
result in fire or explosion.
• Set thermostat to lowest setting.
• Turn "OFF" all electric power to appliance if service is
to be performed.
• Remove front jacket panel.
• Turn gas shutoff valve handle clockwise
to closed
position. Handle should be perpendicular to gas pipe.
• Replace front jacket panel.
• Do not use this appliance if any part has
been under water. Immediately call a qualified service technician to inspect appliance and to
replace any part of control system and any gas
control which has been under water.
10-1 Gas Shutoff Valve
10.1 OPERATING INSTRUCTIONS
Stop! Read Safety information above.
• Set thermostat to lowest setting.
• Turn "OFF" all electrical power to appliance.
• This appliance is equipped with an ignition device which
automatically lights the burner. Do not try to light
burner by hand!
OPEN POSITION
• Remove front jacket panel.
• Turn gas shutoff valve clockwise
to closed position.
Handle should be perpendicular to gas pipe.
• Wait 5 minutes for any gas to clear. Smell for gas,
including near floor. If you smell gas, STOP! Follow
instructions on this page: “What To Do If You Smell
Gas.” If you do not smell gas, go to next step.
• Turn gas shutoff valve counter clockwise
to the
open position. Handle should be parallel to gas pipe.
• Replace front jacket panel.
• Turn "ON" electrical power to appliance.
• Set thermostat to desired setting.
• If the appliance will not operate, follow instructions TO
TURN OFF GAS TO APPLIANCE and call your service
technician or gas supplier.
CLOSED POSITION
34
11 - GENERAL MAINTENANCE AND CLEANING
11.1 Beginning of Each Heating Season
! DANGER
• Check boiler area is free from combustible materials,
gasoline, and other flammable vapors and liquids.
Before servicing, turn off electrical power to boiler
at service switch. Close manual gas valve to turn
gas supply OFF to boiler.
• Visually inspect combustion air and vent piping for
proper operation. Check for and remove any obstruction
to flow of combustion air or vent gases. Immediately
repair or replace pipe showing deterioration or leakage.
Reassemble per instructions in section 6. Ensure proper
reassembly and resealing of system.
! CAUTION
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation.
• Visually inspect condensate drain line for proper
operation. Checking for deteriorated or plugged
condensate drain line. Verify condensate trap drains
freely.
NOTICE
Verify proper operation after servicing.
• Visually inspect in-line pressure switch vapor trap for
water build-up. Drain condensate collector by removing
bottom fitting if water is detected. See Figure 9-4.
NOTICE
• Test safety relief valve for proper operation. Refer to
valve manufacturer's instructions packaged with relief
valve.
Perform regular service and maintenance by
qualified service agency at least once every 12
months to assure safe, trouble free operation
and maximum efficiency.
• Examine flue passages in heat exchanger, burner,
condensate lines, and cleaning (if necessary) by following
instructions in “Annual Examination and Cleaning of Boiler
Components” in this section.
11-1 Sight Glass
• Circulator pump and combustion air blower motor
furnished with boiler are permanently lubricated from
factory and require no further lubrication. Lubricate
field sourced pumps and/or motors should be lubricated
according to pump and/or motor manufacturer’s
instruction.
• Check following components are operating properly and
are free of blockages or obstructions:
Sight Glass
• air vent;
• check venturi air inlet for blockage and clean as
required;
• check air hose is tight
• supply, return, and flue temperature sensor clips
must be securely seated on pipes; Check boiler for
any sign of leaks.
• Check low water cutoff using user interface.
• Check operation by pressing test button on low water
cutoff.
• "Low Water" LED should illuminate and burner
should shut down.
• Should get error message on User Interface
(E36).
• Every 5 years remove low water cutoff. Reinstall
after cleaning.
• Every 10 years replace low water cutoff.
• Check flame signal with user interface. Should be 8 micro
amps at 100%.
35
11 - GENERAL MAINTENANCE AND CLEANING
11-2 Blower Inlet Assembly
• Visual inspection of flame through sight glass. Burner
should be fully illuminated. See figure 9-5.
A
• Check expansion tank.
11.2 Annual shut down procedure
• Follow instructions “To Turn Off Gas To Appliance” unless
boiler is also used to supply domestic hot water. See
section 10.
• Drain system completely and add antifreeze when
heating system is to remain out of service during freezing
weather.
B
C
• Drain condensate lines when boiler is to be exposed to
freezing temperatures.
! WARNING
Following service procedures must be performed
by qualified service agent. Boiler owner shall not
attempt these steps.
D
! WARNING
Use gloves when handling refractory to avoid
absorption of crystiline silica a potentially dangerous
compound.
E
11.3 Annual Examination and Cleaning of Boiler
Components
F
• Obtain Burner Inspection Kit. See "Parts, Kits and
Optional Accessories" manual.
• Before servicing, turn off electrical power to boiler at
service switch.
Burner Assembly
• Follow instruction 'To Turn Off Gas to Appliance'. Close
main gas valve.
A
Blower Inlet Housing
B
Refractory
• Visually inspect through sight glass verify no flame is
present.
C
Burner
D
Flame Sensor
E
Igniter
F
Sight Glass
*
Inlet Gasket
* Not Shown
36
11 - GENERAL MAINTENANCE AND CLEANING
11-2 Condensate Collector
• Examine flue passages by removing blower/burner
assembly from heat exchanger.
• Confirm manual gas valve is closed.
• Disconnect flame sensor and igniter wires.
• Remove 2 screws and carefully remove igniter.
A
• Remove 2 screws and carefully remove flame rod
sensor.
• Loosen and remove four nuts connecting fuel mixer
assembly to heat exchanger.
• Entire gas train can be moved aside. Take precaution
to not kink flexible gas hose.
• Remove gasket and burner. It may be necessary to
unlatch both of the Heat Exchanger locking straps.
• Clean burner using air hose directed into top of
burner opening. This will dislodge any debris build up
in burner ports.
B
• Remove four nuts holding condensate collector from
bottom of heat exchanger assembly. Also remove
gasket.
• Clean heat exchanger with low pressure water spray.
If this does not clean fins adequately, use flexible
handle nylon brush to loosen sediment and oxide on
all accessible heating surfaces of heat exchanger.
Take care not to get brush stuck in heat exchanger.
C
Condensate Collector
A
Combustion Chamber
B
Condensate Collector
C
Condensate Drain
• After brushing and rinsing, remove any remaining
loosened sediment using shop vacuum with snorkel
attachment. Inspect burner for foreign matter in
flame ports or inside burner. Foreign matter should
be removed by blowing with compressed air or
vacuuming. If burner cannot be cleaned, it must be
replaced.
• Reinstall refractory, burner holder, burner and
replace gasket (in that order). Position fuel mixer
assembly over studs. Install four nuts and tighten.
Reinstall igniter and igniter gasket and fasten with
two screws. Replace gasket and condensate collector
to bottom of heat exchanger assembly. Replace and
tighten four nuts holding collector to heat exchanger
assembly.
• Connect igniter wires, and gas valve wires.
• Visually inspect condensate trap. Remove any foreign
material visible in condensate lines as described below:
• Inspect for sediment or blockage.
• Flush out with water or vacuum.
• Follow the instructions “Filling The Condensate Trap
With Water” section 9.1.
• Follow Boiler Start-up and Operational Test. See section
9.4.
37
12 - RATINGS AND CAPACITIES
TABLE 12-1: SEA LEVEL RATINGS
NATURAL AND PROPANE GASES
Size
Boiler Input Rate (MBH)(1)
Maximum
Minimum
75
100
15
20
075
100
Heating Capacity
(MBH)(1)(2)
69
91
Net I=B=R Rating,
Water (MBH)(1)(3)
AFUE(2)
60
79
97.0
97.0
1000 Btu/hr (British Thermal Units Per Hour)
Heating Capacity and AFUE (Annual Fuel Utilization Efficiency) are based on DOE (Department of Energy) test
procedures.
(3)
Net I=B=R Ratings based on piping and pickup allowance of 1.15. Contact ECR Technical Support before selecting boiler for
installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems,
etc.
(1)
(2)
12.1 Ratings and Capacities
• Constructed and hydrostatically tested for maximum
allowable working pressure of 50 psig (pounds per
square inch gauge) (345 kPa) in accordance with ASME
Boiler and Pressure Vessel Code, Section IV, Rules for
Construction of Heating Boilers.
• Ratings are for sea level applications.
• US - Boiler derates input 4% for every 1000 feet (304
m) above an elevation of 2000 feet (610 m) above sea
level.
• Canada - Boiler certified for altitudes of 0-4500 feet
(1350 m) above sea level. Contact Provincial authority
having jurisdiction for installations above 4500 feet
(1350 m) above sea level.
38
39
NO
NO
Replace Switch
YES
User Interface Display or
LWCO lamps lit?
YES
Turn off Circuit Breaker.
Partially pull back ¼”
connectors on Boiler Switch.
Jump 1 & 2. Do not use bare
wire. Turn on Circuit
Breaker. Is Power Lamp lit?
NO
YES
Make sure all wire
harness plugs are
properly pushed in.
Release plug lock with
finger, remove and
reconnect all 7 plugs .
Check wiring from User
Interface to Low Voltage
Terminal Strip including
checking continuity of
the wires. Does User
Interface Display work?
Replace Control Module
NO
YES
Is voltage at Service
Receptacle more than
104Vac?
Replace User Interface
Repair wiring or call utility
company
Does User Interface
Display function?
NO
YES
Remove User Interface
from base. Using Digital
Voltmeter check for 25
to 30 Vdc. Is voltage
present?
NO
YES
Check Circuit Breaker or
Emergency Disconnect Switch
and 120 Vac Wiring to Boiler. Fix
or Repair External Wiring
Check for 120 Vac Inside
Hi-Voltage Terminal Box
YES
NO
Turn on Boiler Switch.
Is Lamp Lit?
YES
NO
YES
Power Switch Lamp Lit?
YES
NO
NO
Is User Interface Lit?
13 - TROUBLE SHOOTING
GO TO NEXT
PAGE
13 - TROUBLE SHOOTING
______
Lockout Alarm
Blocking Too Long Error
A 0 0 Go to Page 41
FP____
Blocking Error
False Flame Detect
E35
Go to Page 48
______
Lockout Alarm
Ignit Error
A 0 1 Go to Page 42
______
Blocking Error
Low Water Cutoff
E36
Go to Page 49
______
Lockout Alarm
GV Relay Error
A 0 5 Go to Page 41
______
Blocking Error
Return Temp
E40
Go to Page 50
______
Lockout Alarm
Safety Relay Error
_P____
Lockout Alarm
Fan Error
Replace Control
A 0 6 Module
______
Blocking Error
E43
Various Text Messages
Replace Control
Module
______
Blocking Error
Phase Error
E44
Go to Page 50
______
Replace Control
A 0 9 to A 1 4
Lockout Alarm
Module
Various Text Messages
______
Blocking Error
Net Freq Error
E45
Go to Page 51
_P____
Lockout Alarm
Air SW Not Open
A 1 5 Go to Page 44
______
Blocking Error
Faulty Earth Error
E46
Go to Page 52
______
Lockout Alarm
Varioius Text
A16
______
Lockout Alarm
Air SW Not Closed
A 0 8 Go to Page 43
______
Blocking Error
E47
Various Text Messages
Replace Control
Module
A 1 7 Go to Page 46
_P____
Blocking Error
Supply Sens Open
E51
Go to Page 52
______
Lockout Alarm
Max Temp Error
A 1 8 Go to Page 47
_P____
Blocking Error
Return Sens Open
E52
Go to Page 53
______
Lockout Alarm
Flame Out Too Late
A20
Replace Gas
Valve
_P____
Blocking Error
Flue Sens Shorted
E57
Go to Page 54
______
Lockout Alarm
Flame Error 1
A21
Replace Gas
Valve
_P____
Blocking Error
E59
Supply Sens Shorted
Go to Page 54
______
Replace Control
A22 A23
Lockout Alarm
Module
Various Text Messages
_P____
Blocking Error
E60
Return Sens Shorted
Go to Page 55
______
Lockout Alarm
3 Flame Failures
_P____
Blocking Error
Flue Sens Shorted
E65
Go to Page 55
______
Replace Control
A 2 7 to A 3 0
Lockout Alarm
Module
Various Text Messages
_P____
Blocking Error
Reset Button Error
E66
Error clears in
1-2 minutes
______
Replace Control
E 3 1 to E 3 4
Blocking Error
Module
Various Text Messages
______
E73 to E79
Replace Control
Blocking Error
Module
Various Fan Error Tex E 81, 88, 89
Replace Control
Module
A 2 4 Go to Page 48
40
41
YES
Connect harness
NO
Replace harness
Disconnect harness from Gas
Valve. Does each wire have
continuity between Gas Valve
and Control Module?
YES
NO
NO
Replace Gas Valve
Replace Control
Module
YES
A05
Is harness connected to Gas
Valve? Is harness connected
to Control Module J13?
_P___
Lockout Alarm
GV relay error
Disconnect harness from
Control Module J13. Measure
resistance across J13-3 and
J13-4. Is resistance between
1.0 and 1.2 kohms?
Enter Installer Menu, Boiler
Status. Scroll to most recent
Lockout Alarm or Blocking Error.
Diagnose corrective action using
appropriate Troubleshooting Tree.
_____
Lockout Alarm
A00
Blocking too long error
13 - TROUBLE SHOOTING
42
Check vent
termination for
proper consideration
of wind effects
Is the flame signal
greater than
8.0uA?
YES
NO
Enter the Installer
Menu and place
the boiler into test
mode in high fire.
Once the boiler
starts, go to the
boiler status
screen and
monitor the flame
signal.
Install propane
Orifice
YES
NO
Remove the flame
rod and igniter rod
and inspect. Is
there any
indication of
damage or debris
baked on?
NO
Replace/clean flame
rod or igniter
YES
Does the boiler
ignite and stay
running?
Replace Control
NO
Reset the boiler by
pressing the
‘Reset’ button.
When the boiler
tries to ignite, is
there a strong,
consistent` spark
evident throught
the sight glass?
YES
NO
NO
YES
NO
Refer to the Gas
Valve
Troubleshooting
Tree
YES
Is there any
apparent debris or
obstruction of the
flue way?
Inspect the flue
way along the
sides of the baffle
near the coil for
blockages.
Clear vent blockage
Connect all wires and
check for secure fit
NO
Refer to the Heat
Exchanger cleaning
section
NO
Any sign of
damage to burner
surface?
Remove the gas
train including the
flue transition.
Remove the
burner and
inspect.
Replace Burner
NO
Is a spark observed
between the igniter
and ground?
YES
Is the vent system
clear?
With the ignition
lead connected to
the igniter, hold the
tip near the chassis
ground and attempt
ignition.
YES
YES
Check all wires, including
Igniter and Flame Sensor
leads. Check for proper and
tight connections to control
board. Are all wires
connected?
Inspect Vent
System for
blockages.
Disconnect the gas
valve electrical
harness and close
the gas shutoff
valve.
Open gas shutoff
valves
YES
Is the Gas Shutoff
Valve closed?
Is this a new boiler on first
startup?
YES
NO
Is this boiler to run with
propane gas?
YES
NO
A01
Is the propane gas orifice
properly installed?
NO
YES
_P___
Lockout Alarm
Ignit error
13 - TROUBLE SHOOTING
43
Replace Control
Module
YES
NO
Replace Combustion
Air Blower
YES
YES
YES
Replace harness
NO
Replace Control
Module
NO
Connect harness
NO
Are 3-wire and 4-wire
harnesses connected to
Combustion Air Blower?
Disconnect harness from
Control Module J9. Measure
voltage between J9-2 and J9-3.
Is voltage 120 Vac ± 10%
Disconnect 3-wire harness
from Combustion Air Blower.
Measure continuity in each
wire. Continuity in each wire?
Replace Combustion
Air Blower
Replace harness
NO
Disconnect harness from
Control Module J9. Continuity
in each wire of 4-wire harness
(yellow, red, white, black)?
YES
Disconnect 4-wire harness
from Combustion Air Blower.
Does Combustion Air Blower
speed increase?
A08
Is Combustion Air Blower
operating?
YES
NO
_____
Lockout Alarm
Fan error
13 - TROUBLE SHOOTING
44
Replace Combustion
Air Blower
YES
Replace wire(s)
NO
Disconnect 4-wire harness
from Combustion Air Blower
and Control Module J9.
Continuity in each wire?
YES
Replace harness
YES
Replace Control
Module
NO
Disconnect harness from
Control Module J16. Continuity
between J16-2 and J16-3?
Correct wiring
NO
Are orange wires connected to
Air Pressure Switch NO and C
terminals (interchangeable)?
Disconnect orange wires from
Air Pressure Switch.
Continuity across NO and C
terminals?
YES
NO
Replace Air Pressure
Switch
Connect harness
Is 4-wire harness connected to
Combustion Air Blower?
YES
NO
A15
Is Combustion Air Blower
operating?
YES
NO
_P___
Lockout Alarm
Air SW not open
13 - TROUBLE SHOOTING
13 - TROUBLE SHOOTING
13-1 Differential Air Pressure Switch
Connect manometer to Air Pressure Switch tubing (see
figure 13-2). Follow operating instructions to initiate boiler
operation. Refer to Trouble Shooting Tree page 46.
!
Differential Air
Pressure Switch
Vinyl Tubing
Silicone Tubing
Test Port
DANGER
Vinyl Tubing
Replace all test port caps. Failure to comply will
result in death or serious injury.
Tee
Combustion
Analyzer Port
Vinyl Cap
(Typ. 2)
Test Lines
-
+
Inclined Manometer
(Or Differential Pressure Gauge)
13-2 Test Port Locations
Test Port
In-line Pressure
Switch Vapor
Collector
Combustion
Analyzer
Test Port
45
46
Replace Air Pressure
Switch
YES
See page 45
Replace Combustion
Air Blower
NO
YES
Replace Control
Module
NO
Replace wires
Connect harness
Is 3-wire harness connected to
Combustion Air Blower?
YES
NO
Disconnect 3-wire harness
from Combustion Air Blower.
Disconnect harness from
Control Module J9. Continuity
in each wire?
YES
NO
Measure voltage between J9-2
and J9-3. Is voltage
approximately 120 VAC?
Connect wires
NO
Replace Combustion
Air Blower
Replace wires
Remove obstructions
NO
Connect manometer to Air
Pressure Switch tubing (see
figure). Follow OPERATING
INSTRUCTIONS to initiate
boiler operation. Is pressure
greater than 0.14" wc (35 Pa)?
YES
Is combustion air and vent
piping free of obstructions?
Disconnect wires from Air
Pressure Switch. Disconnect
harness from J16. Continuity
is each wire?
YES
NO
YES
Are orange wires connected to
Air Pressure Switch terminals
NC and C?
Is Combustion Air Blower
operating?
YES
NO
_P___
Lockout Alarm
A17
Air SW not closed
13 - TROUBLE SHOOTING
47
YES
YES
Replace High
Temperature Supply
Switch
°F
50 to 90
90 to 130
130 to 150
150 to 200
°C
10 to 32
32 to 54
54 to 66
66 to 94
2K to 1K ohms
2K to 3K ohms
3K to 9K ohms
9K to 24K ohms
Resistance
High Temperature Supply Switch
Resistance Chart
Replace Control
Module
NO
Is High Temperature Supply
Switch open (no continuity
between terminals 1 and 3)?
Replace wire(s)
NO
Replace High
Temperature Supply
Switch
Is supply water temperature
less than 185°F (91°C)?
YES
NO
Measure resistance across
High Temperature Supply
Switch terminals 2 and 4?
Does resistance match supply
water temperature (see table)?
YES
NO
NO
Replace Control
Module
Replace High
Temperature Supply
Switch
YES
Is High Temperature Supply
Switch open (no continuity
between terminals 1 and 3)?
A18
Disconnect harness from High
Temperature Supply Switch
and Control Module J13.
Continuity from J13-5 to Switch
1? Continuity from J13-6 to
Switch 3?
_____
Lockout Alarm
Max Temp Error
13 - TROUBLE SHOOTING
48
Turn Gas Shutoff
Valve clockwise to
closed position.
Follow instructions
TO TURN OFF GAS
TO APPLIANCE.
Replace Gas Valve.
Replace Control
Module
Inspect burner through sight
glass. Is flame present?
YES
NO
_P___
Blocking Error
E35
False flame detect
Replace Control
Module
YES
YES
Replace Flame
Sensor and Burner
NO
NO
Replace Flame
Sensor or harness
Clean or replace
Flame Sensor
Remove Flame Sensor. Is rod
free of contamination?
YES
NO
Follow OPERATING
INSTRUCTIONS to initiate
boiler operation. Enter Installer
Menu, Boiler Status, Flame
Signal. Is flame signal greater
than 3.7 uA?
A24
Inspect harness connection
Flame Sensor. Is connection
clean and secure?
_P___
Lockout Alarm
3 flame failures
13 - TROUBLE SHOOTING
49
Replace Low Water Cutoff
YES
NO
YES
Replace Harness
NO
Connect harness to
Transformer. Disconnect
harness from Low Water
Cutoff. Is 24 Vac at
terminals 1 & 2?
Disconnect Blue/Yellow
harness from Transformer.
Using digital meter check for 24
Vac. Is 24 to 30 Vac present?
YES
NO
YES
NO
Replace Main Harness
Replace Transformer
YES
Disconnect Black/White
Harness from Transformer.
Is 120 Vac measured at
Harness?
Insert Harness
NO
Is Harness plugged into Low Water Cutoff?
Is Blue/Yellow Harness plugged into 24 Vac Transformer?
Is Black/White Harness plugged into 24 volt harness?
Check Low Water Cutoff.
Is Green Power Lamp lit?
YES
NO
Replace Low Water Cutoff
Replace Harness
NO
Disconnect harness from
Low Water Cutoff and
Control Module J16. Check
continuity if harness.
Harness OK?
Insert Harness
Is harness plugged into
Control Module J16?
YES
NO
Repair System Piping,
remove any remaining air in
system and refill.
YES
Check Low Water Cutoff. Is
amber lamp lit?
_____
Blocking Error
E36
Low Water Cutoff
13 - TROUBLE SHOOTING
50
Replace Control
Module
YES
Install Heat
Exchanger Pump in
proper orientation
Replace Return Water
Sensor
NO
Disconnect harness from
Return Water Sensor.
Measure resistance using
digital ohm meter. Is
resistance between 950 to
33,000 ohms?
NO
Is Heat Exchanger Pump
oriented properly?
(Pump Arrow pointing down?)
YES
E40
Correct wiring
Is correct harness connected to
return sensor (2 Brown Wires)?
YES
NO
_____
Blocking Error
Return Temp
E44
Correct field wiring
Replace Control
Module
Measure incoming power with
volt meter. Is terminal 120
VAC (L) approximately 120
VAC? Is 120 VAC (N)
approximately 0 VAC?
YES
NO
_P___
Blocking Error
Phase error
13 - TROUBLE SHOOTING
51
Correct wiring
YES
Replace Control
Module
NO
Is field wiring loose or faulty?
Replace circuit
breaker
Is power supply circuit breaker
loose or faulty?
YES
NO
Provide frequency
stabilized power
supply rated at 60 Hz
+/- 2%
Is power supply between 59
and 61 Hz?
YES
NO
_P___
Blocking Error
E45
Net frequency error
13 - TROUBLE SHOOTING
52
YES
°F
50 to 90
90 to 130
130 to 150
150 to 200
°C
10 to 32
32 to 54
54 to 66
66 to 94
2K to 1K ohms
2K to 3K ohms
3K to 9K ohms
9K to 24K ohms
Resistance
Supply Water Sensor
Resistance Chart
Replace Control
Module
YES
YES
YES
Replace Supply
Water Sensor
NO
Replace Wires
NO
Insert Harness
NO
Is harness plugged into Supply
Water Sensor?
Is harness plugged into Control
Module J5?
_P___
Blocking Error
E51
Supply Sens Open
Disconnect J5 from Control
Module. Using digital meter
measure check continuity of
brown wires between Control
and Sensor. Continuity?
Using digital meter measure
resistance between Supply
Water Sensor terminals J5-11
and J5-3. Measure resistance
of Sensor with digital meter.
Estimate Sensor temperature.
Does it fall in the range of the
Resistance Chart?
Connect ground
conductor
NO
Correct faulty ground
conductor
Disconnect field wiring. Is
continuity between field wiring
neutral and ground less than
10 ohms?
YES
NO
Replace Control
Module
E46
Is field grounding conductor
connected to High Voltage
Terminal Strip 120 VAC (G)?
_P___
Blocking Error
Faulty ground
13 - TROUBLE SHOOTING
53
Replace Control
Module
YES
Replace Wires
NO
Replace Return
Temperature Sensor
NO
Measure Return Temperature
Sensor resistance with digital
meter. Estimate Sensor
temperature. Do temperature
and resistance fall within
ranges shown in chart?
YES
Check continuity of brown
wires between Return
Temperature Sensor and
Control Module J5-4 and J5-12
Continuity?
YES
°F
50 to 90
90 to 130
130 to 150
150 to 200
°C
10 to 32
32 to 54
54 to 66
66 to 94
2K to 1K ohms
2K to 3K ohms
3K to 9K ohms
9K to 24K ohms
Resistance
Return Temperature Sensor
Resistance Chart
Insert Harness
NO
Is harness plugged into Return
Temperature Sensor?
Is harness plugged into Control
Module J5?
_P___
Blocking Error
E52
Return Sens Open
13 - TROUBLE SHOOTING
54
NO
°F
50 to 90
90 to 130
130 to 150
150 to 200
°C
10 to 32
32 to 54
54 to 66
66 to 94
2K to 1K ohms
2K to 3K ohms
3K to 9K ohms
9K to 24K ohms
Resistance
Replace wires
Disconnect J5 from Control
Module. Continuity between
J5-11 and Switch 2?
Continuity between J5-3 and
Switch 4?
YES
NO
NO
Replace Control
Module
Replace High
Temperature Supply
Switch
YES
Disconnect wire harness from
High Temperature Supply
Switch. Measure resistance
across terminals 2 and 4. Do
temperature and resistance fall
within ranges shown in chart?
_P___
Blocking Error
E59
Supply Sensor Shorted
High Temperature Supply Switch
Resistance Chart
Insert harness
Replace wires
Replace Vent
Temperature Sensor
Measure resistance across
Vent Temperature Sensor
terminals. Does resistance
match estimated flue
temperature (see table)?
YES
NO
YES
Disconnect harness from Vent
Temperature Sensor and
Control Module J5. Continuity
for each blue wire?
Replace Control
Module
E57
Is harness plugged into Vent
Temperature Sensor? Is
harness plugged into Control
Module J5?
YES
NO
_P___
Blocking Error
Flue sens open
13 - TROUBLE SHOOTING
55
YES
Replace Control
Module
NO
Disconnect harness from
Control Module J5. Measure
resistance between brown
wires at terminals J5-4 and J512. Is resistance less than 50
ohms?
NO
Replace wires
Replace Return Water
Sensor
YES
Disconnect harness from
Return Temperature Sensor.
Measure resistance across
sensor terminals. Is resistance
less than 50 ohms?
_P___
Blocking Error
E60
Return sens shorted
Replace Control
Module
YES
NO
Replace Vent
Temperature Sensor
°F
50 to 90
90 to 130
130 to 150
150 to 200
°C
10 to 32
32 to 54
54 to 66
66 to 94
2K to 1K ohms
2K to 3K ohms
3K to 9K ohms
9K to 24K ohms
Resistance
Vent Temperature Sensor
Resistance Chart
Replace wires
NO
Disconnect harness from
Control Module J5. Continuity
in blue wires?
YES
Disconnect wire harness from
Vent Temperature Sensor.
Measure Sensor resistance.
Does resistance match
estimated flue temperature?
_P___
Blocking Error
E65
Flue Sens Shorted
13 - TROUBLE SHOOTING
14 - WIRING DIAGRAM
14.1 Connection Diagram
56
14 - WIRING DIAGRAM
14.2 Schematic Diagram of Ladder Form
57
15 - GLOSSARY
• GAS PIPE SIZES
• ANSI - American National Standards Institute, Inc.
oversees creation and maintenance of voluntary
consensus standards, including ANSI Z21.13/CSA 4.9:
Gas-Fired Low Pressure Steam and Hot Water Boilers.
NATURAL GAS
• ASTM - American Society for Testing and Materials.
ASTM International is one of largest voluntary standards
development organizations in world trusted source for
technical standards for materials, products, systems,
and services. Known for their high technical quality and
market relevancy, ASTM International standards have
important role in information infrastructure that guides
design, manufacturing and trade in the global economy.
Pipe Capacity - BTU Per Hour Input Includes Fittings
Length of Pipe
- Ft.
1/2”
3/4”
1”
1 1/4”
20
92,000
190,000
350,000
625,000
40
63,000
130,000
245,000
445,000
60
50,000
105,000
195,000
365,000
PROPANE GAS
Pipe Capacity - BTU Per Hour Input Includes Fittings
Length of Pipe
- Ft.
• AUTHORITY HAVING JURISDICTION - Individual or
organization adopting and enforcing codes, rules, and
by-laws governing various concerns of community.
Commonly referred to as "final authority" for any matters
relating to LIFE SAFETY and BUILDING CONSTRUCTION
within a community.
Copper Tubing
Iron Pipe
(Outside Diameter)
5/8”
3/4”
1/2”
3/4”
20
131,000
216,000
189,000
393,000
40
90,000
145,000
129,000
267,000
60
72,000
121,000
103,000
217,000
• HIGH-VOLTAGE - Circuit involving potential of not more
than 600 volts and having circuit characteristics in excess
of those of low-voltage circuit.
• IGNITER - Device utilizing electrical energy to ignite gas
at main burner.
• Btu - Abbreviation for British Thermal Unit. Quantity
of heat required to raise temperature of 1 pound of
water1°F.
• LEAK CHECK - Operation performed on gas piping system
to verify system does not leak.
• BURNER - Device for final conveyance of gas or mixture
of gas and air, to combustion zone.
• LOW WATER CUTOFF - Device constructed to automatically
cut off fuel supply when surface of water in boiler falls to
lowest safe water level.
• COMBUSTION - Rapid oxidation of fuel gases accompanied
by production of heat or heat and light. Complete combustion
of fuel is possible only in presence of adequate supply of
Oxygen.
• LOW-VOLTAGE - Circuit involving potential of not more
than 30 volts.
• COMBUSTIBLE MATERIAL - Materials made of or surfaced
with wood, compressed paper, plant fibers, or other
materials capable of being ignited and burned. Such
material shall be considered combustible even though
flame-proofed, fire-retardant treated, or plastered.
• METRIC GAS METERS
MBH
=
127,116 x
cu meters
Seconds
For example: Gas Meter measures 0.1 cubic Meters in 100
seconds
• CONDENSATE - Liquid separated from flue gas due to
reduction in temperature.
• DIRECT VENT BOILER - Boiler constructed and installed
so all combustion air is derived directly from outdoors
and all vent gases are discharged to outdoors.
MBH
=
127,116 x 0.1
100
= 127 MBH
• PRESSURE TEST - Operation performed to verify gas
tight integrity of gas piping following its installation or
modification.
• DRAFT - Pressure difference causes gases or air to flow
through a chimney, vent , flue or appliance.
• PURGE - To free gas conduit of air or gas, or mixture of
gas and air.
• FLA - Full load amps.
• FLUE GASES - Products of combustion plus excess air in
appliance flues or heat exchanger.
• PURGE TIME - Period of time intended to allow for
dissipation of any unburned gas or residual products of
combustion.
58
15 - GLOSSARY
• QUALIFIED AGENCY - Any individual, firm, corporation, or
company engaged in and responsible for:
• Installation, testing, or replacement of gas piping,
or connection, installation, testing, repair or
servicing of appliances and equipment.
• Experienced in such work.
• Familiar with all precautions required.
• Complies with all requirements of authority having
jurisdiction.
• SAFETY RELIEF VALVE - Valve designed to relieve
pressure in hot water supply system when pressure
exceeds pressure capability of equipment.
• SAFETY SHUTOFF DEVICE - Device that will shut off gas
supply to controlled burner in event source of ignition
fails.
• SEDIMENT TRAP - Gas piping arrangement designed to
collect any liquid or solid contaminant before reaching
gas valve.
• VENT - Passageway used to convey flue gases from
appliance vent connector to outdoors.
• VENTING SYSTEM - Continuous open passageway from
of appliance vent connector to outdoors for purpose of
removing flue or vent gases.
59
APPENDIX A - CONTROL MODULE
1.1 Introduction
Operation with LCD character display module
Boiler is equipped with programmable electronic control
and user interface module.
1.2 Operation
• Display: 4x20 character LCD screen to show boiler
status.
• Function Keys
Key
Description
- Manual Lockout Reset
- Enter/Exit user menu
- Go to previous screen
- Select a menu item
- Confirm new parameter value
- Scroll up to next menu item
- Increase value
- Scroll down to next menu item
- Decrease value
1.3 Status Indication
The following status screens can be displayed:
Boiler Status Indicator
F = Flame Detected
SERVICE Reminder
P = Central Heating System pump On
B = Combustion Air Blower On
S = Safety Relay Check
G = Gas Valve Open
D = DHW Pump On
Service Reminder Indicator
Boiler in Standby Mode
Boiler Supply Water
Temperature Indicator.
Boiler Running in Central
Heat mode
Combustion Air Blower
Speed Indicator
Boiler Running in DHW
mode
Lockout Alarm Indicator
Error code and short text description is displayed
Press 'Reset" key for manual
reset.
Blocking Error in DHW
Error code and short text
description is displayed Boiler
automatically returns to
Standby Mode when condition is
eliminated.
60
APPENDIX A - CONTROL MODULE
1.4 Sequence of Operation
Operational State
No
User Interface Display
Standby: No Demand
Heat
Demand?
Explanation
Boiler operates in standby mode
until demand for Central Heat (CH) or
Domestic Hot Water (DHW) is detected.
Yes
CH or DHW pump is turned based on
type of heating demand.
DHW CH
Pump on
(CH call is illustrated)
No
Supply
Temperature
<Setpoint?
Control Module compares supply
temperature to set point. Boiler proceeds
to ignition if supply temperature is less
than set point.
Yes
Air Pressure
Switch Open?
No
Air Pressure Switch is checked for open
circuit before energizing Combustion Air
Blower
Lockout
Error
A15
Closed Air Pressure Switch during this
stage will result in Lockout Error.
Yes
Combustion Air Blower is energized to
prove flow though Combustion and Vent
Systems.
Combustion
Air Blower
On
No
Air Pressure
Switch
Closed?
After
3
Trials
Air Pressure Switch is checked for closed
circuit.
Lockout
Error
A17
Open Air Pressure Switch during this
stage will result in Lockout Error after 3
trials.
Yes
Combustion Air Blower speed
modulates to prepurge setting for 15
seconds.
15 Second
Prepurge
Ignition
Sparking
Sparking initiated sequence.
After 2 seconds
61
APPENDIX A - CONTROL MODULE
1.4 Sequence of Operation
Operational State
User Interface Display
After 2 seconds
Flame
Detected?
Yes
If flame detected before Gas Valve opens
during ignition boiler will lockout.
Lockout
Error A21
Please refer to troubleshooting guide.
Note:
5 Ignition
trials,
then
Lockout A01
No
Gas Valve
Energized
Gas Valve energized to deliver air/fuel to
burner.
After 3 seconds
Flame
Detected?
If flame undetected after 3 seconds boiler
will de-energize Gas Valve and enter post
purge mode for 30 seconds.
No
30 second
post purge
Ignition attempted 5 times before
lockout.
Boiler will run provided all operational
and safety devices are within limits
Yes
Yes
Refer to for more information.
Control module adjusts firing rate
according to heating demand. When
Boiler detects demand met, will enter
post purge mode then standby mode.
Heat Demand
Met?
No
Explanation
No
If simultaneous demand for Central Heat
and DHW, boiler will enter DHW Priority
Mode.
Priority mode limits amount of time
boiler can run in DHW mode to meet CH
demand.
Simultaneous
DHW + CH
Demand?
Yes
Max DHW Priority Time setting determines maximum time allowed for DHW
heating mode.
See Max DHW
Priority Time
Setting
Please refer to section Appendix A section
1.5 for more information.
DHW
Priority
Mode
62
APPENDIX A - CONTROL MODULE
1.5 Theory of Operation
Explanation
STANDBY
User Interface Display
Boiler operates in standby mode until demand for Central Heat
(CH) or Domestic Hot Water (DHW) is detected.
S t a n d b y :
N o
D e m a n
7 5 ° F
User Menu can be accessed by pressing ‘Menu’ key on user
interface.
d
Installer Menu can be accessed by simultaneously holding
‘Menu’ and ‘Enter’ keys for 5 seconds.
User Menu
User Menu
User Menu structure includes:
• ‘Boiler Status’ submenu– User can monitor general boiler
status parameters such as sensor temperatures and
pump operation.
M E N U
B o i l e r
S t a t u s
S e t t i n g s
C a s c a d e
S t a t u s
• ‘Settings’ submenu – User can view CH , adjust DHW
supply water set points and also select control language.
• ‘Cascade Status’ submenu – Boiler set to function as
part of multiple boiler installation; submenu used to view
runtime parameters. See Multiple Boiler Manual.
Supply Temperature set point displayed.
If boiler running in CH mode, CH set point displayed.
B O I L E R
S T A T U S
Boiler Status
C u r r e n t
S u p p l y
S e t p o i n t
1 6 0 ° F
▼
Note:
• While running in Outdoor Reset mode, this value may
change in proportion with the outdoor temperature.
• If the boiler is running in DHW mode, the DHW supply set
point is displayed.
B O
S
R
D
I
u
e
H
L E R
S T A T U S
▲
p p l y
1 4 0 ° F
t u r n
1 2 0 ° F
W
S t a t
O p e n ▼
B O
S
F
O
I
y
l
u
L
s
u
t
B O
B
C
D
I
o
H
H
L E R
S
i l e r
/ S y s t
W
P u m
E R
S T A T U S
t e m
e
d o o r
▲
N . C .
1 3 2 ° F
3 6 ° F ▼
T A T U S
P u m p
e m
P u m p
p
Several boiler runtime parameters can be viewed while in ‘Boiler
Status’ submenu.
Operational status of pump system also shown.
Information available during all states of boiler operation.
Sensor values with troubleshooting tree used to diagnose
typical problems.
▲
O f f
O f f
O f f
63
APPENDIX A - CONTROL MODULE
Explanation
User Interface Display
Adjust CH set point to hydronic system design while in
Operating in CH Mode = 0 (CH with Thermostat) or 3 (Permanent Demand).
In CH Mode = 1 (CH with Thermostat and Outdoor Reset) or 2
(CH with Full Outdoor Reset). Display will change to ‘OD Reset
Setpoint’ and cannot be changed. Controller calculates set point
based on outdoor temperature.
S E T T I N G S
C e n t r a l
H e a t i n g
S e t p o i n t
° F
▼
Settings
Setting Range: 104° F to 195° F (40° C to 91° C)
Default Value: 140° F (60° C)
S E T T I N G S
D H W
▲
Note: For explanation of available CH heating modes, refer to
‘CH Mode’ section located in ‘CH Settings’ submenu.
DHW set point determines supply water temperature set point
while operating in DHW mode.
S e t p o i n t
° F
▼
Setting Range: 104° F to 195° F (40° C to 91° C)
Default Value: 180° F (82° C)
S E T T I N G S
C h a n g e
T e m p e r a t u r e
U n i t s
F a h r e n h e i t
° F
▲
S E T T I N G S
C h a n g e
L a n g u a g e
▲
User interface temperature unit of measure is selected using
‘Change Temperature Units’ screen.
Fahrenheit and Celsius available.
▼
Select user interface language using ‘Change Language’ screen.
E n g l i s h
English and French are available.
▼
64
APPENDIX A - CONTROL MODULE
Explanation
User Interface Display
Installer Menu
The Installer Menu structure includes:
Installer Menu
• ‘Boiler Status’ submenu – User monitors detailed boiler
status parameters such as flame signal, fan speeds and
stored error codes.
I N
B
B
C
D
C
S
S
o
o
H
H
a
y
T A L L
i l e r
i l e r
S e t
W
S e
s c a d
s t e m
E R
S
C
t i
t t
e
T
t
o
n
i
S
e
M
a
n
g
n
e
s
E
t
f
s
g
t
t
• ‘Boiler Config’ submenu – Modifies general boiler
settings.
N U
u s
i g
• ‘CH Settings’ submenu – Modifies advanced Central
Heating settings including outdoor reset curve
parameters and boost function.
s
t i n g s
• ‘DHW Settings’ – Modifies Domestic hot Water control
settings such as DHW priority time.
• ‘Cascade Settings’ - Refer to Multiple Boiler Manual.
• ‘System Test’ – Tool aids setup of boiler installation or
diagnosis of common problems.
Boiler Status
S T A T U S
F a n
S p e e d
A c t u a l
L o w
P o w e r
S T A T U S
F a n
S p e e d
I g n i t i o n
H i
P o w e r
S T A T U S
F l a m e
S i g n a l
F a i l u r e s
4 0 0 0 R P M
1 5 6 0 R P M▼
▲
3 5 0 0 R P M
5 7 2 5 R P M▼
▲
0 7 . 2 u A
2 ▼
Combustion air Blower provides airflow through Combustion and
Vent systems.
Fan speed status screen indicates actual and operational fan
speeds in RPM, high, low and ignition power speed settings.
Settings are for information only to aid in troubleshooting.
Boiler equipped with ionization rod to detect presence of
combustion using flame rectification method. When flame is
present, flame ionization rod measures small DC offset current
across flame to ground (i.e. burner surface).
‘Flame’ screen in ‘Boiler Status’ submenu displays information
regarding flame ionization system; for information only and
used in diagnosing combustion problems. See troubleshooting
guide.
65
APPENDIX A - CONTROL MODULE
Explanation
User Interface Display
Installer Menu
Control module logs successful and failed ignition attempts.
Information accessed in ‘Ignition Attempts’ Screen as shown.
Ignition attempts are stored in non-volatile memory and are
retained in event of power failure.
Boiler Status
Figure A-1 Typical Ignition Cycle
S T A T U S
▲
I g n i t i o n
A t t e m p t s
S u c c e s f u l
4 2 6 7
F a i l e d
2 1 ▼
Following control features are implemented to ensure safe and
reliable operation of Combustion System:
False Flame
Detection
If flame is detected at end of pre-spark
period (Ignit_0) than lockout will occur.
Re-ignition
If at end of safety period no flame detected
control will go to post-purge removing
unburned gas. Re-ignition attempt started
following same cycle. Number of re-ignition
attempts limited to 4 after which lockout
occurs.
Intermittent
Operation
Boiler can be firing continuously for 24
hours. Burner switched off and restart
sequence follows.
Flame out too
late
If flame detected after post purge lockout
follows.
Safety relay test In Safety ON/OFF state correct operation
of safety relay is proved before ignition.
UL3563 High
Limit Temperature Device
66
Boiler comes equipped with UL353
approved temperature high limit device.
Gas Valve de-energized when supply
temperature exceeds 203°F lockout
follows.
APPENDIX A - CONTROL MODULE
Explanation
Boiler Configuration
Boiler Status
User Interface Display
S T A T U S
B o i l e r
C H
D H W
R u n
▲
T i m e
3 2 0 H R
1 4 5 H R ▼
S T A T U S
# E 3 9
▲
2 H r s
t o
p r e v .
B l o c k
L o w
W a t e r
C u t o f f
▼
S T A T U S
1 3 H r s
t o
I g n i t
# A 0 1
▲
p r e v .
L o c k
i o n
E r r o r
i
l
e r
A d d r e s s :
B O I L E R
C O N F I G
L O W
W A T E R
C U T O F F
Data stored in non-volatile memory and retained in event of
power failure.
Boiler logs last 16 blocking errors and 16 lockout errors in
non-volatile memory. Information retained in event of power
failure.
Most recent blocking error code and its text description
displayed with elapsed time in hours since logged.
Optional Computer interface Kit purchased separately to view
extended error code history
‘Address Selection” screen used to set boiler position in multiple
boiler cascade installation. Refer to Multiple Boiler Installation
Manual.
B O I L E R
C O N F I G
A d d r e s s
S e l e c t i o n :
B o
Boiler stores information regarding total CH and DHW run time
in hours.
0 ▼
▲
D i s a b l e d ▼
Default setting of ‘0’ indicates boiler is operating in single boiler
mode.
Boiler incorporates integrated Low Water Cutoff device (LWCO)
that disables boiler when low water condition exists. LWCO
device located at high point of internal Heat Exchanger loop to
detect low water condition.
Detection of low water condition will result in blocking error;
boiler will automatically resume normal operation when proper
water level returns. Refer to Troubleshooting Guide.
LWCO device can be disabled for diagnostic purposes or where
applicable code permits.
67
APPENDIX A - CONTROL MODULE
Explanation
User Interface Display
Two pump modes are available:
1. Pump Mode = 0 ‘CH or CH&DHW’
• In this mode either the CH or DHW pump terminal is
energized depending on the type of demand (CH or DHW).
• CH and DHW pumps are never energized at the same time.
• In the case of a simultaneous call for both CH and DHW,
the energized pump depends on whether the boiler is
currently supplying the CH or DHW demand. Refer to DHW
Priority settings below.
• This is typical of a hydronic system design with separate CH
and DHW Pumps.
B O I L E R
C O N F I G
▲
P u m p
M o d e
M O D E : 0
o r
C H & D H W
Boiler Configuration
C H
▼
2. Pump Mode = 4 ‘System Pump’
• In this mode only one external system pump is installed in
the hydronic system. This pump will energize independent
of the type of demand (CH or DHW).
• Connect this pump to the CH/System Pump electrical
terminal block. See page 56 for diagram.
• The DHW pump terminal does not function.
• This is typical of a hydronic system design which utilizes
zone valves for all CH zones and an DHW indirect tank.
Note:
• Pump Mode selection depends on electrical and
hydronic system design. Please refer to sections 5
and 8 for recommended hydronic piping and electrical
configurations.
• Internal heat exchanger pump is energized anytime
demand exists regardless of Pump Mode setting or type
of demand (CH or DHW).
B O I L
S E R
S t
R e
E
V
a
m
R
C O N F I G
I C E
R E M I N D E R
t u s
O n
i n d e r
3 6 5
d a y s
'Service Reminder’ feature allows the installer to enable or
disable a service reminder notification on the User Interface at a
▲ predefined interval .
Service reminder does not affect operation of boiler in any way.
It is only a reminder to End User that routine preventative
maintenance is required by qualified service technician.
Allowed Range: 1 to 999 days
68
APPENDIX A - CONTROL MODULE
Explanation
User Interface Display
4. Central Heating (CH) modes available:
• CH Mode = 0 ‘CH with Thermostat’
• Boiler will attempt to satisfy CH demand while CH
thermostat input is closed.
• Boiler will modulate its firing rate to maintain CH set
point and match system heat load.
• CH set point adjusted in ‘Settings’ submenu under ‘User
Menu’
CH Settings
• CH Mode = 1 ‘CH with Thermostat and Outdoor Reset’
• Boiler will attempt to satisfy CH demand when CH
thermostat input is closed.
• Boiler will modulate its firing rate to maintain CH set
point and match system heat load.
• CH set point calculated as function of outdoor
temperature using outdoor reset curve. See Figure A-2
C H
S E T T I N G S
C H
m o d e
C H
w i
t h
M O D E : 1
t h e r m o s t a t ▼
• CH Mode = 2 ‘CH with Full Outdoor Reset’
• Boiler will permanently attempt to satisfy CH
demand.
• CH thermostat input is ignored.
• CH set point calculated as function of outdoor
temperature using outdoor reset curve. See Figure A-2
• CH Mode = 3 ‘CH with Permanent Demand’
• Boiler will permanently attempt to satisfy CH
demand.
• CH thermostat input is ignored.
• CH set point is adjusted in ‘Settings’ submenu under
‘User Menu’
Note:
• Once CH demand is satisfied (i.e. CH thermostat opens or
boiler determines its minimum firing rate exceeds system
heating load):
• Burner shuts off, boiler enters post purge.
• CH pump continues to run for 30 seconds.
• Control will wait until Anti-cycle time of 180 seconds
elapses before boiler fires again. Prevents shortcycling.
• The internal heat exchanger pump is energized anytime demand
exists regardless of Pump Mode setting or type of demand (CH or
DHW).
69
APPENDIX A - CONTROL MODULE
Explanation
User Interface Display
C H
S E T T I N G S
W a r m
W e a t h e r
S h u t d o w n
T e m p
▲
If outdoor temperature is greater than Warm Weather Shutdown
Temperature, demand for CH blocked and pumps stopped.
7 0 ° F ▼
Allowed Range: 35°F to 100°F (2°C to 38°C)
Default Setting: 70°F (21°C)
C H
R e
B
O
S
s
o
u
E
e
i
t
T T I N G S
▲
t
C u r v e
D e s i g n
l e r
A 1 8 0 ° F
d o o r
2 5 ° F ▼
Boiler capable of operating in Outdoor Reset Mode when
included Outdoor Sensor is connected and proper CH Mode
selected.
If CH Mode = 1, ‘Outdoor Temperature Reset with ThermoAllowed Boiler Range: 60°F to 195°F (40° C stat’ or 2, ‘Full Outdoor Reset’ boiler will adjust CH set point
proportional to outdoor temperature as defined by Outdoor
to 91°C)
Reset Curve below.
Default Boiler Setting:180° F (82°C)
CH Settings
Outdoor reset curve adjusted by modifying Design and Mild
Weather reference temperatures. See points A & B of Reset
Curve below.
C H
R .
B
O
S
C
o
u
E
u
i
t
T
r
l
d
T I N G S
v e
M i l d
e r
B
o o r
▲
W e a t h .
7 0 ° F
7 0 ° F ▼
Allowed Boiler Range: 35°F to 120 F (2°C to
49°C)
Default Boiler Setting: 70°F (21°C)
Calculated CH set point always limited between ‘Reset Curve
Boiler Minimum/Maximum’ temperatures. See points C & D of
Reset Curve below.
Figure A-2 Outdoor Reset Curve
A
Allowed Outdoor Range: 35°F to 85°F (2°C to
29°C)
Default Outdoor Setting: 70°F (21°C)
C H
R e
B
B
S
s
o
o
E
e
i
i
T T I N G S
t
C u r v e
l e r
M i n
l e r
M a x
D
▲
C
D
0 7 0 ° F
1 8 0 ° F ▼
B
Allowed Min. Range: 40°F to 180°F (4°C to 82°C)
Default Min. Setting: 70°F (21°C)
Allowed Max. Range: 80°F to 195°F (27°C to 91°
C)
Default Max. Setting: 180°F (82°C)
C
Note:
• Modes only function when outdoor temperature sensor
connected.
• If ‘Open’ outdoor sensor detected CH set point equal to
‘Boiler Reset Curve Design’ temperature.
• Outdoor temperature used for CH set point calculation
measured once a minute and averaged with
previous measurement to compensate for rapid outdoor
temperature variations.
70
APPENDIX A - CONTROL MODULE
Explanation
User Interface Display
CH Settings
Outdoor reset boost function increases CH set point by
increment (‘Temp’) if CH demand continues beyond pre-set
time limit (‘Time’).
C H
B o
T
T
S
o
e
i
E
s
m
m
T T I N G S
▲
t
F u n c t i o n
p
1 0 ° F
e
2 0 m i n ▼
CH set point will continue to increase until set point reaches
195°F / 91°C
Allowable Temperature Increment: 0..36 °F (0..20 °C)
Default Temperature increment:
18 °F (10 °C)
Allowable Time Delay: 1..120 minutes
Default Time Delay: 20 minutes
C H
S E T T I N G S
M a x i m u m
P o w e r
M a x
▲
C H
1 0 0 %
▼
Maximum boiler power in CH mode limited by adjusting
‘Maximum Power CH’ setting. Boiler will not exceed this value
while operating in CH Mode.
Allowable Range: 1..100%
Default Setting: 100%
Two DHW modes are available
• DHW Mode = 0 ‘No DHW
• DHW Mode is disabled
DHW Settings
• The DHW thermostat input is ignored and the DHW
pump is not used.
D H
D
D
s
W
S
H W
H W
e n s
E
m
s
o
T T I N G S
o d e
M O D E : 1
t o r e
w i t h
r
• DHW Mode = 2 ‘DHW Store with Thermostat’
• Boiler reacts to DHW demand when DHW thermostat
input closes.
• Boiler modulates to meet DHW demand similar to CH
Mode except DHW set point is used. DHW set point set
in Settings’ submenu found in 'User Menu’.
▼
• Simultaneous CH & DHW demands handled using DHW
Priority Timing. See ‘DHW Maximum Priority Time’
setting below.
Note:
• Outdoor reset function disabled while operating in DHW
Mode.
• Typical when using a DHW indirect storage tank.
• After DHW demand satisfied, boiler enters post purge
mode and DHW pump continues to run for 15 seconds.
71
APPENDIX A - CONTROL MODULE
Explanation
DHW Settings
User Interface Display
Maximum time boiler operates in DHW mode limited by DHW
Maximum Priority Time Setting.
D H W
S E T T
D H W
m a x
t i m e
I N G S
.
p r i o r i t y
3 0 m i n
Allowed Range: 1 to 60 Minutes
Default Setting: 30 Minutes
▲
Priority timer starts when both CH and DHW demand is
present. Boiler will switch from DHW back to CH operation after
Maximum Priority Time has elapsed.
CH demand then has priority until Maximum Priority Time has
elapsed.
Process repeats until either CH or DHW demand satisfied.
System test can be activated via installer menu for testing
system at fixed power rates.
Boiler can be started without CH or DHW demand being
present. System Test has priority over any system demand
while test mode activated.
S Y S T E M
T E S T
S e t
t e s t
p o w e r
O f f
System test mode automatically ends after 30 minutes boiler
resumes normal operation.
System Test
The following modes are available:
• Disabled
• Low power - Burner starts. After ignition period has
finished the burner stays at low power
• Ignition power - Burner starts. Stays at ignition power
• High power - Burner starts. After ignition period has
finished burner stays at high power.
S Y
B
C
D
S
o
H
H
T E M
T
i l e r
\ S y s t
W
P u m
E S T
P u m p
e m
P u m p
p
Note:
O f f
O f f
O f f
!
WARNING
• Before running system test modes, check if hydronic
system capable of dissipating heat.
• Both heat exchanger and CH pumps are activated
during system test only.
• During System Test Mode, boiler will run at fixed
power rates until supply water temperature is
93°C/195°F
• All other safety functions remain active while in
System Test Mode.
72
73
74
75
CONDENSING
GAS BOILER
Models 075 & 100
ECR International, Inc.
2201 Dwyer Ave.
Utica, NY 13501
www.ecrinternational.com
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