"AT" SERIES ELECTRIC
HOT WATER BOILERS
FOR FORCED HOT WATER
INSTALLATION,
OPERATION &
MAINTENANCE
MANUAL
H
An ISO 9001-2008 Certified Company
ECR International, Inc.
2201 Dwyer Ave
Utica, NY 13501
Information and specifications outlined in this manual in effect at the
time of printing of this manual. ECR International reserves the right to
discontinue, change specifications or system design at any time without
notice and without incurring any obligation, whatsoever.
P/N# I80, Rev. C [08/10]
installation manual and operating instructions
TABLE of contents
NOTICE
Safety Symbols ............................................2
Warnings......................................................2
Introduction..................................................3
Product Description........................................3
Voltage Rating Tables.....................................4
Installation Procedure....................................5
Design of Water Circulating System................. 6
Connecting Supply and Return Piping............... 6
Connecting Electrical Power Supply.................. 8
Wiring Diagrams.......................................... 11
Thermostat Installation................................ 15
Startup and Seasonal Maintenance................ 15
Troubleshooting........................................... 16
Maintenance .............................................. 17
Parts List - 2 Element Electric Boilers ............ 18
Parts List - 4 Element Electric Boilers............. 19
Additional Wiring Diagrams........................... 20
Modular Boiler Piping................................... 23
Troubleshooting........................................... 24
"AT" Series Boiler Dimensions....................... 27
Homeowner's Reference Table....................... 28
Read the following instructions completely
before installing!!
WARNING
!
Boiler sizing is crucial. The maximum
hourly heat loss for each heated space should
be calculated in accordance with procedures
describes in The Hydronics Institute (I=B=R)
manual H-22 (Heat Loss Calculation Guide),
or by any other method which is suitable for
local conditions, provided the results are in
substantial agreement. Select appropriate
boiler based on accurate heat loss calculation.
Do not oversize boiler, as sizing is
critical for in-floor radiant heat
applications.
Keep boiler area clear and free from
combustible materials, gasoline and other
flammable vapors and liquids.
Saftey symbols
Do not obstruct air openings to boiler room.
Following symbols are used throughout this manual
to notify reader of potential hazards of varying risk
levels.
Modification, substitution or elimination
of factory equipped, supplied or specified
components may result in property damage,
personal injury or loss of life.
DANGER
!
Indicates an imminently hazardous situation
which, if not avoided, WILL result in death,
serious injury or substantial property damage.
NOTICE
WARNING
!
Owner: Installation and service of this boiler
must be performed by qualified installer.
Indicates an imminently hazardous situation
which, if not avoided, may result in death,
serious injury or substantial property damage.
Installer: Leave all instructions with the boiler
for future reference.
CAUTION
!
When this product is installed in the
Commonwealth of Massachusetts installation
must be performed by licensed plumber or
licensed gas fitter.*
Indicates an imminently hazardous situation
which, if not avoided, may result in injury or
property damage.
* In other areas, consult authority having
jurisdiction.
NOTICE
Indicates information which should be
followed to ensure proper installation and
operation.
KEEP THIS MANUAL NEAR BOILER
RETAIN FOR FUTURE REFERENCE
2
installation manual and operating instructions
Warnings
introduction
Manual is intended to familiarize installer and user of
Electric Hydronic Block with its installation, operation
and maintenance to assure its normal trouble free
operation.
WARNING
!
Installation of boiler should be done only
by qualified expert and in accordance with
appropriate installation manual. Installing
boiler or any other electric appliance with
improper methods or materials may result in
serious injury or death due to fire.
Argo electric boilers are designed and manufactured
with quality components for maximum life, durability
and minimum service. Follow installation instructions
carefully before operating heating system for
optimum efficiency and satisfaction. Failure to do so
may result in breach of warranty.
product description
Electric Hydronic Block is heating device converts
electrical energy to heat energy through medium
of water. Simplified theory of this conversion is as
follows:
Argo Electric Boilers are controlled by electronic
control board maintaining water temperature. Control
cycles heating elements based on heating demand,
and preset boiler outlet water temperature. Control
also operates 120Vac circulating pump rated up
to 5A. When thermostat calls for heat, control will
operate boiler to regulate water temperature at preselected set point. System pump is on whenever
thermostat calling for heat.
Electrical Energy x Conversion Factor = Energy
– Or –
Kilowatts Of Electricity Used Per Hour x 3412 =
British Thermal Units (Btuh) Available Per Hour For
Heating.
Information is basis used to establish Electric
Hydronic Block ratings (See Table 1 on page 4). Since
conversion process requires no combustion, boiler
operates with highest possible efficiency.
Electric Hydronic Block is constructed with cast
iron boiler that conforms to American Society of
Mechanical Engineers (ASME) Boiler & Pressure
Vessel Code. Interior design allows just enough
water to be present for proper heating element
operation - no excess water is stored which would
cause undesirable thermal losses and longer recovery
times.
Control system is assembled in modular package
keeping overall size and weight of Electric Hydronic
Block to minimum. Construction of entire Electric
Hydronic Block conforms to Canadian Standards
Association (CSA) Standards for Safety for Electric
Boilers.
Following important product information is located on
cabinet cover:
• Model Number
• Manufacturer's Serial Number
• BTU Rating
• Heating Element Ratings
• Water Pressure & Temperature Limits
• CSA Listing
• ASME Stamp
• Total Amps
• Clearance
3
VOLTAGE RATING TABLES
Table A
AT Boiler Electrical Specifications
Model
6
Boiler Size
Nominal kW
240
240
Voltage
(AC)
12,000
10,000
8,000
6,000
Output
Power
(Watts)
41,000
34,100
27,300
20,500
Output
Power
BTU/Hr.
50.0
41.7
33.3
25.0
Amperage
6,000
5,000
4,000
3,000
Element Size
(Watts) at
240Vac
2
2
2
2
Number
Elements
6
6
6
6
Accessory
Load (A)
56.0
47.7
39.3
31.0
Total
Amps
70.0
59.6
49.2
38.8
MCA
70.0
60.0
50.0
40.0
MOP
4
4
6
8
60°C
(140ºF)
AWG
4
6
8
8
75°C
(167ºF)
AWG
6
6
8
10
90°C
(194ºF)
AWG
Operating at 240 Vac
AT0623
8
240
240
*Recommended Wire
AT0824
12
10
“AT” Series - 2 Element Boiler
AT1226
AT1025
6
6
72.7
56.0
90.8
70.0
100.0
70.0
2
4
3
4
4
6
“AT” Series - 4 Element Boiler
4
4
2
4,000
2
3,000
1/0
1
66.7
125.0
1/0
50.0
111.7
2/0
54,600
89.3
150.0
41,000
6
132.5
16,000
4
106.0
12,000
5,000
6
240
83.3
4
240
68,200
6,000
16
20,000
100.0
12
240
82,000
AT1644
20
24,000
AT1243
AT2045
240
*Recommended Wire
24
“AT” Series - 2 Element Boiler
AT2446
Operating at 208 Vac
2
2
6
6
42.1
34.9
52.6
43.6
60.0
45.0
6
6
6
8
8
8
10
4,000
6
10
5,000
6
8
28.9
4
35.0
36.1
70.0
34.6
20,500
61.7
27.7
25,600
49.3
6
6,009
6
2
7,511
2
3,000
208
6,000
21.7
208
43.3
15,400
8
30,800
4,507
10
9,013
208
AT0824
208
6
AT1025
12
AT0623
AT1226
AT2045
AT1644
AT1243
24
20
16
12
208
208
208
208
18,027
15,200
12,018
9,013
61,600
51,200
41,000
30,800
86.7
72.2
57.8
43.3
6,000
5,000
4,000
3,000
4
4
4
4
6
6
6
6
92.7
78.2
63.8
49.3
115.8
97.8
79.7
61.7
125.0
100.0
80.0
70.0
1/0
1
3
4
1
3
4
6
2
3
4
6
“AT” Series - 4 Element Boiler
AT2446
MCA = Minimum Circuit Ampacity
MOP = Maximum Over-current protection
*Recommended Field Wire Size per NEC Table 310.16
Not more than three (3) current carrying conductors in raceway
Based on ambient temperature of 30ºC (86ºF). Other ambient temperatures see NEC or CEC for correction factors.
Use Copper conductors only.
Recommended use only Class B or C type wire (see Table B).
Check with latest version of NEC and local codes. UL-834, Section 14.2
Assuming 60ºC (140ºF) wire will be used for connections to boiler rated at 80 amperes or less, and
75ºC (167ºF) wire will be used with boiler rated at more than 80 amperes.
4
INSTALLATION MANUAL AND OPERATING
INSTRUCTIONS
installation procedure
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage.
Install unit with minimum clearance from top of unit to
ceiling of 16 inches. If minimum requirements of space
are used, suggested enclosure be exposed to means of
ventilation. Electric Hydronic Block unit must be mounted
level, using top of back plate as leveling point.
1. Installation must conform to requirements of authority
having jurisdiction or, in absence of such requirements,
to Canadian Electrical Code, CSA C22.1 Part 1, and/or
any local regulations in Canada, or National Electrical
Code, ANSI/NFPA to (Latest Edition) and/or any local
regulations and codes in the USA. Reference should
also be made to local Electric utility regulations and
other codes in effect in the area in which installation is
to be made.
6. When installed in utility room, door should be wide
enough to allow largest boiler part to enter, or to
permit replacement of another appliance such as water
heater.
Minimum clearances to combustible constructions
are:
2. Where required by authority having jurisdiction,
installation must conform to American Society of
Mechanical Engineers Safety Code for Controls and
Safety Devices for Automatically Fired Boilers, ANSI/
ASME No. CSD-1.
TOP............................................................ 16 IN.
FRONT....................................................... 12 IN.
LEFT SIDE................................................. 20 IN.
RIGHT SIDE............................................... 20 IN.
REAR............................................................ 0 IN.
Bottom....................................................10 IN.
3. Boiler is intended for indoor installation only and
not subject to water spray or leakage.
CAUTION
!
BOILER LOCATION & CLEARANCE DIMENSIONS
Do not install boiler under potential water
source.
20”
MIN
20”
MIN
(RULE OF THUMB: Water Under Wires.)
4. Electric Hydronic Block units are provided with
mounting brackets for easy wall mounting. Use of
lag screws or anchor bolts through holes provided, or
on 3/4" plywood panel. On uneven walls, suggested
mounting surface be provided such as two 2 x 4’s.
10”
MIN
5’-3”
SUGGESTED
HEIGHT FOR
EASE OF
INSTALLATION
5. Surface of Electric Hydronic Block except back shall be
mounted no closer than 20 inches to wall surface on
left and 20 inches minimum to wall surface on right or
more, depending on plumbing. Allow sufficient room
from front of unit to door or wall to remove cover - at
least 12 inches minimum.
NOTE: Greater clearances for access should supercede
fire protection clearance.
5
DESIGN OF WATER CIrculating system
System should be designed as primary/secondary piping
and to operate with a maximum output temperature of
180ºF or lower and a temperature rise across the unit
of 20ºF or lower. Refer to tables below and Figures 2
& 3.
4. Suggested plumbing arrangements are illustrated in
Figures 2 & 3. Inlet or return pipe is located at bottom
of unit. Reverse flow will result in noisy operation
and cause very early element failure. Drain cock is
to be located at lowest point of piping.
5. Outlet or supply pipe line to radiation is located at top
of unit. Combination temperature pressure (altitude)
gauge is provided with each unit and should be
installed close to boiler outlet. It is important gauge
sensor be completely immersed in flowing water
to assure correct temperature readings. Manual or
automatic water make up supply may be located in
this area below. Circulator pump should be installed
on supply side (pumping away).
NOTICE
Return water temperature must be higher
than room temperature in which boiler is
installed to prevent condensation.
“AT” Series - 2 Element Boiler
KW Capacity
Minimum Flow Rate (GPM)*
6
2.0
8
2.7
10
3.4
12
4.1
6. Install gate valves at locations shown in Figures 2
& 3, so any boiler servicing requiring removal of
water can be done quickly and easily. Not illustrated
but recommended is installation of air vents at high
points of hydronic system. Devices will reduce initial
start up time and help avoid element burnout during
entire life of heating system.
“AT” Series - 4 Element Boiler
KW Capacity
Minimum Flow Rate (GPM)*
12
4.1
16
5.5
20
6.8
24
8.2
7. Pressure relief valve is supplied with each Electric
Hydronic Block and should be installed at the location
and discharge direction shown in Figure 1, using
pipe nipple and elbow supplied. Piping should be
added so that any water discharged will not damage
boiler or other system components.
* Flow rate based on 20°ΔT
COnnecting supply and return piping
1. Maintain minimum clearance of one inch to hot
water pipes.
Figure 1
2. Hot water boilers installed above radiation level must
be provided with low water cutoff device either as
part of boiler or at time of boiler installation.
plumbing and
accessory
installation
NOTICE
In some states low water cutoff device
(LWCO) may be required. Check your local
codes.
3. When boiler is connected to heating system utilizing
multiple zone circulators, each circulator must be
supplied with flow control valve to prevent gravity
circulation.
NOTICE
Reduced pressure back flow preventer must
be present under provisions required by
Environmental Protection Agency, (EPA).
8. For further piping information refer to Hydronics
Institute (I=B=R) manual 200 (Installation Guide for Residential Hydronics).
6
PRIMary/secondary piping
figure 2
primary/secondary piping for
Multiple zoning with circulators
figure 3
primary/secondary piping for
Multiple zoning with ZONE VALVES
7
CONNECTING ELECTRICAL POWER SUPPLY
• Hold lug at specified torque for 5 seconds before releasing.
When tightening this will ensure any cold flow of material
is compensated for.
WIRING THE BOILER
!
WARNING
Field WirinG Diagram
Do not use aluminum wire!!
Argo Electric Hydronic Boilers are pre-wired for use with
240-volt, 3 wire, single-phase, 50/60-hertz power. See
Table A on page 4 for reduction in boiler capacity when line
voltage is less than 240 volts.
Opening provided in jacket bottom panel for field wiring,
refer to rating chart for recommended wire sizes.
Electrical wiring shall be done in accordance with Canadian
Electrical Code, CSA C22.1 Part 1, authority having
jurisdiction in Canada, or National Electrical code, ANSI/
NFPA 70 and/or authority having jurisdiction in USA. Verify
nameplate rating and check related codes to properly size
conductors, switches and over current protection. Several
openings are provided on bottom of cabinet for different
voltage connections. Wire connections refer to wiring
diagram on inside of boiler front cover.
Wire Classes - Table B
Number of Concentric Strands
All circuit breakers or disconnects ahead of boiler must
be OFF. If boiler contains integral breakers (depending on
option), it is recommended they are also turned off at this
time. Remove boiler front cover by removing 4 screws from
top and sides.
If boiler is used in multiple zone system, the zone valves
must be powered from independent source and have
electrically isolated end switches or isolating relays wired in
parallel to boiler thermostat terminals. Do not attempt to
power zone valves from transformer in boiler control
system!!
Wire Size AWG
Class B
Class C
10
7
19
8
7
19
6
7
19
4
7
19
3
7
19
2
7
19
1
19
37
1/0
19
37
2/0
19
37
Class B - Power cables
Class C - Power cables where more flexibility is desired
Field Wire Line Side Torque Specifications - Table C
FIELD WIRING
• All Field wiring shall be in accordance with NEC or CEC
standards. Minimum Circuit Ampacity (MCA) and recommended Maximum Overcurrent Protection (MOP) are listed on nameplate of unit, see Table A.
• Use Copper conductors only.
• Use only Class B or C Stranded wire. See Table B.
• Wire Strip Length: 11/16” (Minimum). (Refer to field wiring diagram).
• Wire must be fully inserted into terminal block, touching
back of entrance hole.
• Field terminal wire lugs shall be tightened in accordance
with manufacture's recommended torque specifications
using appropriate torque wrench. Proper toque settings
are listed on terminal block, see Table C.
• Hex head wrench size required for Terminal Block: 5/16”.
For Circuit Breaker: Flat Screwdriver.
• Do not use wire grease on wire termination connections
and terminal block. This will change torque properties.
The Terminal block was not tested or approved using wire
grease.
Wire Size (AWG)
Torque requirements (in LBS)
2/0-6
120
8
40
10-14
35
WIRING ON CONTROL
Pump: Connect only 120 Vac 1/6 HP (maximum)
pump to terminals C1(L) and C2(N) on controller. Strip
wire ends before inserting into terminal block. Tighten
terminal screws. Do not use pump rated greater
than 5 amps!!
Thermostat: Connect thermostat or zone valve
end switch to terminals TT and TT (Figure 4). Do not
apply external power source to terminals!! Strip
wire ends before inserting into terminal block. Tighten
terminal screw clamps.
Figure 4
8
CONNECTING ELECTRICAL POWER SUPPLY
Figure 5
CONTROL INFORMATION
Control Board Power Consumption:
0.8A max.
LED Display Lights (Figure 6):
A total of 8 LED indicator lights display the following
information:
T-T (Green): LED lit when thermostat calling for heat.
Fault (Red): LED lit/flashes operating error/safety fault.
Safety Switch (Green): LED no safety faults.
Circ (Green): LED circulator terminals are energized.
Heating Element#1 (Green): LED element#1 is
energized.
6. Heating Element #2 (Green): LED element #2 is
energized.
7. Heating Element #3 (Green): LED element #3 is
energized.
8. Heating Element #4 (Green): LED element #4 is
energized.
1.
2.
3.
4.
5.
LIMIT control operation
1. When boiler water temperature exceeds high limit
setting on aquastat, all heating element control relays
are instantly de-energized. Circulator continues
to operate until call for heat ends. When water
temperature drops below aquastat re-set differential,
heating element power relays close as per time delay
sequence.
2. Main Power Supply: Depending on model
designation, the electric Hydronic Block may be
energized by following alternating current service
entrances: 240 volt single phase 50 or 60 cycle 3 wire.
Wire size see Table A. Sizes listed for various capacity
units include total amperes necessary to operate
elements, circulator and zone valves where used. Wire
sizes specified conform to Canadian Electrical Code
(Canada) or National Electric Code (USA) and include
derating for ampacity and temperature. Use copper
wire only. Check state and local requirements.
Figure 6
Read data name plate before connecting unit. Electrical
connections are provided and located for proper
installation.
Use only copper wire of proper size and make sure all
terminations are tight. Do not use aluminum wire!!
Signal/Control Inputs:
TT: Thermostat or zone valve end switch, switching
input, closed activation.
3. Circulator Power Supply: Terminals identified
HL: High limit temperature sensors (factory installed),
normally closed.
as C1(L) and C2(N) at bottom of control panel
(Figure 5) may be used to supply one circulator pump
power. Circulator motor shall not be larger than 1/6
horsepower with maximum 5.0 amp rating. Wiring from
control panel to the pump should have insulation rated
75°C. Circuit protection is provided by 15 amp breaker
or fuse (depending on option) on control board.
LWC: Low water cutoff (optional) end switch, normally
closed (factory installed jumper).
FLOW: Flow switch (optional) end switch, normally
closed (factory installed jumper).
NOTE: If circulator pump is larger than maximum size
listed above, separate circulator pump relay must be
provided with separate overload protection. Where more
than one circulator is used for zoning, it must be installed
and protected according to approved electrical codes.
9
CONTROL INFORMATION Continued
Control Board Specifications:
and set point temperature.
After call for heat has been satisfied, elements will
de-energize ("Element" LEDs turn off) by control and
circulator will continue to be energized for 3
minutes to purge boiler. After 3 minutes control
will de-energize circulator ("Circ" LED turns off).
•Dimensions: 5-7/8"(W) x 9-3/8" (L) x 1-5/8" (H)
•Operating Control Outlet Water Temperature:
90°F - 180°F (adjustable)
•High Limit Control Outlet Water Temperature:
If during start-up or during operation safety end
switch opens its respective contact, control deenergizes all elements, continues to energize
circulator, and flashes visible fault code ("Fault" LED
flashes) along with audible fault code. (See fault
codes (below)) Control has built-in reset function.
200°F (fixed)
•Control Input Voltage: 120V ac
•Control Output Voltage: 120V ac, 5A max. (circulator
terminal)
•Power Output: 120V ac pump output is switched by
onboard circulator relay. Load current limited must not
exceed 5A.
Temperature Setting: Water "Set point"
temperature adjustment dial on control should be set
at designed boiler water temperature.
Temperature Control Ranges:
Control Mounting: Control mounted using
1/2" tall plastic standoffs. Indicator LEDs are visible
through clear polycarbonate viewing window on front
cover.
Temperature: Degrees Fahrenheit
Operating Temperature Range:
90°F - 180°F
(Factory Setting: 180°F)
Protection From Liquids: Control and other
components located within control panel are sensitive
to water and other liquids. Protect components on
panel from contact with liquids.
Operating Temperature
Differential Range:
+/- 4°F - +/- 20°F
(Factory Setting: 12°F)
Fixed High Limit Temperature: 200°F
Fault Codes (Visual/Audible)
Operating Temperature And Differential
Adjustments: Internal temperature potentiometer
on control.
Number of Flashes/
Pulses
Control Operation: Control switch "On"
position and safety end switches are closed, "Safety
Switch" LED is lit. Once in operating mode, control
uses well-mounted (RTD) sensor to continuously
monitor water temperature.
Description
1
Safety switch fault
2
Stuck/welded element relay contact
3
RTD short
4
RTD open
RTD SENSOR:
Verify RTD sensor is functioning properly, follow steps
below.
Thermostat calls for heat ("TT" LED is lit), control will
energize circulator ("Circ" LED is lit) for 30 seconds
to establish flow. Control will then measure water
temperature and differential setting, perform check
for "open" or "shorted" RTD sensor, verify all safety
end switches are "closed," check for stuck or welded
element relay contacts. Next, control will energize
only one element ("Element" LED is lit) and monitor
water temperature for 60 seconds. Control will
energize additional elements at 30 second intervals
to bring system up to set point temperature in 5
minutes.
1. Remove both RTD leads from terminal block control
board.
2. Use multimeter to take ohm reading across RTD leads.
Properly functioning RTD will produce reading of approximately 1000 ohms at 70°F. Faulty RTD will read
either 0 or 1 on multimeter.
3. Replace RTD if necessary.
Once system reaches set point temperature and
there is still call for heat, control will modulate
number of elements on and off in order to maintain
set point temperature. Required number of elements
energized is determined by heating demand, which
is difference between actual boiler water temperature
10
ELEMENT #2
(ÉLÉMENT No2)
H1
L1
WHT (BLANC)
L1
L2
WHT (BLANC)
L2
11
NOT USED
(NON UTILISÉ)
NOT USED
(NON UTILISÉ)
NOT USED
(NON UTILISÉ)
NOT USED
(NON UTILISÉ)
H2
ELEMENT #2 RELAYS
(RELAIS DE ĽÉLÉMENT No2)
H2
H1
ELEMENT #1 RELAYS
(RELAIS DE ĽÉLÉMENT No1)
WHT/BLK (BLANC/NOIR)
ELEMENT #1
(ÉLÉMENT No1)
WHT/BLK (BLANC/NOIR)
2
3
4
FAULT
(DÉFAILLANCE)
C2
N
CIRCULATOR PUMP, BY OTHERS
(POMPE DE ĽACCELERTEUR, OU AUTRES)
120VAC
CIRC
C1
L
TRANSFORMER
(TRANSFORMATEUR)
CIRCULATOR RELAY
(RELAIS DU
ĽACCELERTEUR)
CIRC
TT
TT
HL
HL
LWC
LWC
FLOW
FLOW
SAFETY SWITCHES
(INTERRUPTEURS DE SÉCURITÉ)
T-T
RTD
L
WHT/BLK (BLANC/NOIR)
HIGH LIMIT SAFETY SWITCH, AUTO RESET
(INTERRUPTEUR DE SÉCURITÉ DE LIMITE SUPÉRIEURE,
REMISE EN MARCHE AUTOMATIQUE)
FACTORY INSTALLED JUMPERS
(CALVALIERS INSTALLÉES Á ĽUSINE)
RED (ROUGE)
RED (ROUGE)
THERMOSTAT, BY OTHERS
(THERMOSTAT, OU AUTRES)
N
L1
POWER BLOCK
(BLOC DE PUISSANCE)
-
(DIAGRAMME SCHÉMATIQUE DU CÂBLAGE
D'UNE CHAUDIÈRE À 2 ÉLÉMENTS)
ARGO "AT" ELECTRIC BOILER
SCHEMATIC WIRING DIAGRAM
2 ELEMENT BOILER,
WITH POWER BLOCK
DRY CONTACT WIRING (POSE DES CÂBLES DE CONTACT SEC)
DRY CONTACT FIELD WIRING (POSE DES CÂBLES DE CONTACT SEC EN CHANTIER)
120 VOLT WIRING (POSE DES CÂBLES 120 VOLT)
120 VOLT FIELD WIRING (POSE DES CÂBLES 120 VOLT SUR EN CHANTIER)
240 VOLT WIRING (POSE DES CÂBLES 240 VOLT)
240 VOLT FIELD WIRING (POSE DES CÂBLES 240 VOLT EN CHANTIER)
WIRE LEGEND / (LÉGENDE DES FILS)
OPTIONAL FLOW SWITCH, BY OTHERS
(INTERRUPTEUR DE DÉBIT - FACULTATIF, OU AUTRES)
OPTIONAL LWCO, BY OTHERS
(ISPOSITIF D'ARRET EN CAS FAIBLE NIVEAU D'EAU FACULTATIF - OU AUTRES)
SOURCE POWER, 120V/60HZ/1PH , BY OTHERS
(SOURCE DU COURANT, 120V/60HZ/1PH, OU AUTRES)
EQUIPMENT GROUNDING LUG
(TENON DE PRISE Á LA TERRE DE Ľ APPAREIL)
L2
SOURCE POWER, 240V/60HZ/1PH 3-WIRE, BY OTHERS
(SOURCE DU COURANT, 240V/60HZ/1PH 3-FILS, OU AUTRES)
FUSE BLOCK
(BLOC DE FUSIBLE)
HIGH LIMIT SAFETY SWITCH, AUTO RESET
(INTERRUPTEUR DE SÉCURITÉ DE LIMITE SUPÉRIEURE,
REMISE EN MARCHE AUTOMATIQUE)
RED (ROUGE)
BLK (NOIR)
NEUTRAL BLOCK
(BLOC NEUTRE)
WHT (BLANC)
WHT (BLANC)
120VAC
INPUT
(ENTRÉE)
N
OFF
(FERMÉ)
ON
(OUVERT)
CONTROL
(COMMANDE)
ARGO ELECTRONIC BOILER CONTROL
(COMMANDE ÉLECTRONIQUE DE LA CHAUDIÈRE ARGO)
DIFFERENTIAL
(DIFFÉRENTIEL)
HEATING ELEMENTS
ENERGIZED
(ACTIVATION DES
ÉLÉMENTS DE
CHAUFFAGE)
1
SETPOINT
(RÉGLAGE)
RTD WATER TEMPERATURE SENSOR
(CAPTEUR DE LA TEMPÉRATURE DE ĽEAU RTD)
WHT/BLK (BLANC/NOIR)
WHT (BLANC)
WIRING DIAGRAMS
Figure 7A
ELEMENT #2
(ÉLÉMENT No2)
H1
L1
WHT (BLANC)
L1
L2
WHT (BLANC)
L2
12
NOT USED
(NON UTILISÉ)
NOT USED
(NON UTILISÉ)
NOT USED
(NON UTILISÉ)
NOT USED
(NON UTILISÉ)
H2
ELEMENT #2 RELAYS
(RELAIS DE ĽÉLÉMENT No2)
H2
H1
ELEMENT #1 RELAYS
(RELAIS DE ĽÉLÉMENT No1)
WHT/BLK (BLANC/NOIR)
ELEMENT #1
(ÉLÉMENT No1)
WHT/BLK (BLANC/NOIR)
2
3
4
FAULT
(DÉFAILLANCE)
C2
C1
CIRCULATOR PUMP, BY OTHERS
(POMPE DE ĽACCELERTEUR, OU AUTRES)
120VAC
CIRC
N
L
TRANSFORMER
(TRANSFORMATEUR)
CIRCULATOR RELAY
(RELAIS DU
ĽACCELERTEUR)
CIRC
TT
TT
HL
HL
LWC
LWC
FLOW
FLOW
SAFETY SWITCHES
(INTERRUPTEURS DE SÉCURITÉ)
T-T
RTD
L
NEUTRAL BLOCK
(BLOC NEUTRE)
WHT/BLK (BLANC/NOIR)
WHT (BLANC)
WHT (BLANC)
120VAC
INPUT
(ENTRÉE)
N
OFF
(FERMÉ)
ON
(OUVERT)
CONTROL
(COMMANDE)
ARGO ELECTRONIC BOILER CONTROL
(COMMANDE ÉLECTRONIQUE DE LA CHAUDIÈRE ARGO)
DIFFERENTIAL
(DIFFÉRENTIEL)
HEATING ELEMENTS
ENERGIZED
(ACTIVATION DES
ÉLÉMENTS DE
CHAUFFAGE)
1
SETPOINT
(RÉGLAGE)
RTD WATER TEMPERATURE SENSOR
(CAPTEUR DE LA TEMPÉRATURE DE ĽEAU RTD)
N
BLK (NOIR)
L2
1
-
(DIAGRAMME SCHÉMATIQUE DU CÂBLAGE
D'UNE CHAUDIÈRE À 2 ÉLÉMENTS)
ARGO "AT" ELECTRIC BOILER
SCHEMATIC WIRING DIAGRAM
2 ELEMENT BOILER,
WITH BREAKERS
DRY CONTACT WIRING (POSE DES CÂBLES DE CONTACT SEC)
DRY CONTACT FIELD WIRING (POSE DES CÂBLES DE CONTACT SEC EN CHANTIER)
120 VOLT WIRING (POSE DES CÂBLES 120 VOLT)
120 VOLT FIELD WIRING (POSE DES CÂBLES 120 VOLT SUR EN CHANTIER)
240 VOLT WIRING (POSE DES CÂBLES 240 VOLT)
240 VOLT FIELD WIRING (POSE DES CÂBLES 240 VOLT EN CHANTIER)
WIRE LEGEND / (LÉGENDE DES FILS)
OPTIONAL FLOW SWITCH, BY OTHERS
(INTERRUPTEUR DE DÉBIT - FACULTATIF, OU AUTRES)
OPTIONAL LWCO, BY OTHERS
(ISPOSITIF D'ARRET EN CAS FAIBLE NIVEAU
D'EAU - FACULTATIF - OU AUTRES)
SOURCE POWER, 120V/60HZ/1PH , BY OTHERS
(SOURCE DU COURANT, 120V/60HZ/1PH, OU AUTRES)
EQUIPMENT GROUNDING LUG
(TENON DE PRISE Á LA TERRE DE Ľ APPAREIL)
SOURCE POWER, 240V/60HZ/1PH 3-WIRE, BY OTHERS
(SOURCE DU COURANT, 240V/60HZ/1PH 3-FILS, OU AUTRES)
L1
2
LOAD CENTER
(CENTRE DE CHARGE)
HIGH LIMIT SAFETY SWITCH, AUTO RESET
(INTERRUPTEUR DE SÉCURITÉ DE LIMITE SUPÉRIEURE,
REMISE EN MARCHE AUTOMATIQUE)
RED (ROUGE)
HIGH LIMIT SAFETY SWITCH, AUTO RESET
(INTERRUPTEUR DE SÉCURITÉ DE LIMITE SUPÉRIEURE,
REMISE EN MARCHE AUTOMATIQUE)
FACTORY INSTALLED JUMPERS
(CALVALIERS INSTALLÉES Á ĽUSINE)
RED (ROUGE)
RED (ROUGE)
THERMOSTAT, BY OTHERS
(THERMOSTAT, OU AUTRES)
WHT (BLANC)
WHT/BLK (BLANC/NOIR)
WIRING DIAGRAMS
Figure 7b
WHT (BLANC)
13
WHT (BLANC)
ELEMENT #4
(ÉLÉMENT No4)
H2
H1
L1
L2
H3
H2
L1
L2
WHT (BLANC)
L1
L2
WHT (BLANC)
H4
L2
WHT/BLK (BLANC/NOIR)
WHT (BLANC)
ELEMENT #4 RELAYS
(RELAIS DE ĽÉLÉMENT No4)
H4
H3
ELEMENT #3 RELAYS
(RELAIS DE ĽÉLÉMENT No3)
WHT/BLK (BLANC/NOIR)
ELEMENT #3
(ÉLÉMENT No3)
L1
ELEMENT #2 RELAYS
(RELAIS DE ĽÉLÉMENT No2)
WHT/BLK (BLANC/NOIR)
ELEMENT #2
(ÉLÉMENT No2)
H1
ELEMENT #1 RELAYS
(RELAIS DE ĽÉLÉMENT No1)
WHT/BLK (BLANC/NOIR)
ELEMENT #1
(ÉLÉMENT No1)
WHT/BLK (BLANC/NOIR)
2
3
4
FAULT
(DÉFAILLANCE)
N
CIRCULATOR PUMP, BY OTHERS
(POMPE DE ĽACCELERTEUR, OU AUTRES)
C2
C1
120VAC
CIRC
L
TRANSFORMER
(TRANSFORMATEUR)
CIRCULATOR RELAY
(RELAIS DU
ĽACCELERTEUR)
CIRC
TT
TT
HL
HL
LWC
LWC
FLOW
FLOW
SAFETY SWITCHES
(INTERRUPTEURS DE SÉCURITÉ)
T-T
RTD
WHT/BLK (BLANC/NOIR)
N
L1
L2
(DIAGRAMME SCHÉMATIQUE DE LA POSE DES
FILS D'UNE CHAUDIÈRE À 4 ÉLÉMENTS)
ARGO "AT" ELECTRIC BOILER
SCHEMATIC WIRING DIAGRAM
4 ELEMENT BOILER,
WITH POWER BLOCK
- DRY CONTACT WIRING (POSE DES CÂBLES DE CONTACT SEC)
- DRY CONTACT FIELD WIRING (POSE DES CÂBLES DE CONTACT SEC
EN CHANTIER)
- 120 VOLT WIRING (POSE DES CÂBLES 120 VOLT)
- 120 VOLT FIELD WIRING (POSE DES CÂBLES 120 VOLT SUR EN CHANTIER)
- 240 VOLT WIRING (POSE DES CÂBLES 240 VOLT)
- 240 VOLT FIELD WIRING (POSE DES CÂBLES 240 VOLT EN CHANTIER)
WIRE LEGEND / (LÉGENDE DES FILS)
OPTIONAL FLOW SWITCH, BY OTHERS
(INTERRUPTEUR DE DÉBIT - FACULTATIF, OU AUTRES)
OPTIONAL LWCO, BY OTHERS
(ISPOSITIF D'ARRET EN CAS FAIBLE NIVEAU D'EAU FACULTATIF - OU AUTRES)
SOURCE POWER, 120V/60HZ/1PH , BY OTHERS
(SOURCE DU COURANT, 120V/60HZ/1PH, OU AUTRES)
EQUIPMENT GROUNDING LUG
(TENON DE PRISE Á LA TERRE DE Ľ APPAREIL)
POWER BLOCK
(BLOC DE PUISSANCE)
SOURCE POWER, 240V/60HZ/1PH 3-WIRE, BY OTHERS
(SOURCE DU COURANT, 240V/60HZ/1PH 3-FILS, OU AUTRES)
FUSE BLOCK
(BLOC DE FUSIBLE)
HIGH LIMIT SAFETY SWITCH, AUTO RESET
(INTERRUPTEUR DE SÉCURITÉ DE LIMITE SUPÉRIEURE,
REMISE EN MARCHE AUTOMATIQUE)
RED (ROUGE)
HIGH LIMIT SAFETY SWITCH, AUTO RESET
(INTERRUPTEUR DE SÉCURITÉ DE LIMITE SUPÉRIEURE,
REMISE EN MARCHE AUTOMATIQUE)
FACTORY INSTALLED JUMPERS
(CALVALIERS INSTALLÉES Á ĽUSINE)
RED (ROUGE)
RED (ROUGE)
THERMOSTAT, BY OTHERS
(THERMOSTAT, OU AUTRES)
WHT (BLANC)
WHT/BLK (BLANC/NOIR)
RTD WATER TEMPERATURE SENSOR
(CAPTEUR DE LA TEMPÉRATURE DE ĽEAU RTD)
BLK (NOIR)
NEUTRAL BLOCK
(BLOC NEUTRE)
WHT (BLANC)
WHT (BLANC)
L
120VAC
INPUT
(ENTRÉE)
N
OFF
(FERMÉ)
ON
(OUVERT)
CONTROL
(COMMANDE)
ARGO ELECTRONIC BOILER CONTROL
(COMMANDE ÉLECTRONIQUE DE LA CHAUDIÈRE ARGO)
DIFFERENTIAL
(DIFFÉRENTIEL)
HEATING ELEMENTS
ENERGIZED
(ACTIVATION DES
ÉLÉMENTS DE
CHAUFFAGE)
1
SETPOINT
(RÉGLAGE)
WHT (NOIR)
WHT/BLK (BLANC/NOIR)
WIRING DIAGRAMS
Figure 8A
WHT (BLANC)
14
WHT (BLANC)
ELEMENT #4
(ÉLÉMENT No4)
L2
H3
H2
L1
L2
WHT (BLANC)
L1
L2
H4
L2
WHT (BLANC)
WHT/BLK (BLANC/NOIR)
WHT (BLANC)
ELEMENT #4 RELAYS
(RELAIS DE ĽÉLÉMENT No4)
H4
H3
ELEMENT #3 RELAYS
(RELAIS DE ĽÉLÉMENT No3)
WHT/BLK (BLANC/NOIR)
ELEMENT #3
(ÉLÉMENT No3)
H1
L1
H2
ELEMENT #2 RELAYS
(RELAIS DE ĽÉLÉMENT No2)
WHT/BLK (BLANC/NOIR)
ELEMENT #2
(ÉLÉMENT No2)
H1
L1
ELEMENT #1 RELAYS
(RELAIS DE ĽÉLÉMENT No1)
WHT/BLK (BLANC/NOIR)
ELEMENT #1
(ÉLÉMENT No1)
WHT/BLK (BLANC/NOIR)
2
3
4
FAULT
(DÉFAILLANCE)
C2
N
CIRCULATOR PUMP, BY OTHERS
(POMPE DE ĽACCELERTEUR, OU AUTRES)
120VAC
CIRC
C1
L
TRANSFORMER
(TRANSFORMATEUR)
CIRCULATOR RELAY
(RELAIS DU
ĽACCELERTEUR)
CIRC
TT
TT
HL
HL
LWC
LWC
FLOW
FLOW
SAFETY SWITCHES
(INTERRUPTEURS DE SÉCURITÉ)
T-T
RTD
L
NEUTRAL BLOCK
(BLOC NEUTRE)
WHT (BLANC)
WHT/BLK (BLANC/NOIR)
WHT (BLANC)
120VAC
INPUT
(ENTRÉE)
N
OFF
(FERMÉ)
ON
(OUVERT)
CONTROL
(COMMANDE)
ARGO ELECTRONIC BOILER CONTROL
(COMMANDE ÉLECTRONIQUE DE LA CHAUDIÈRE ARGO)
HEATING ELEMENTS
ENERGIZED
(ACTIVATION DES
ÉLÉMENTS DE
CHAUFFAGE)
1
DIFFERENTIAL
(DIFFÉRENTIEL)
SETPOINT
(RÉGLAGE)
WHT (NOIR)
N
BLK (NOIR)
L2
(DIAGRAMME SCHÉMATIQUE DU CÂBLAGE
D'UNE CHAUDIÈRE À 4 ÉLÉMENTS)
ARGO "AT" ELECTRIC BOILER
SCHEMATIC WIRING DIAGRAM
4 ELEMENT BOILER,
WITH BREAKERS
- DRY CONTACT WIRING (POSE DES CÂBLES DE CONTACT SEC)
- DRY CONTACT FIELD WIRING (POSE DES CÂBLES DE CONTACT SEC
EN CHANTIER)
- 120 VOLT WIRING (POSE DES CÂBLES 120 VOLT)
- 120 VOLT FIELD WIRING (POSE DES CÂBLES 120 VOLT SUR EN CHANTIER)
- 240 VOLT WIRING (POSE DES CÂBLES 240 VOLT)
- 240 VOLT FIELD WIRING (POSE DES CÂBLES 240 VOLT EN CHANTIER)
WIRE LEGEND / (LÉGENDE DES FILS)
OPTIONAL FLOW SWITCH, BY OTHERS
(INTERRUPTEUR DE DÉBIT - FACULTATIF, OU AUTRES)
OPTIONAL LWCO, BY OTHERS
(ISPOSITIF D'ARRET EN CAS FAIBLE NIVEAU D'EAU FACULTATIF - OU AUTRES)
SOURCE POWER, 120V/60HZ/1PH , BY OTHERS
(SOURCE DU COURANT, 120V/60HZ/1PH, OU AUTRES)
EQUIPMENT GROUNDING LUG
(TENON DE PRISE Á LA TERRE DE Ľ APPAREIL)
SOURCE POWER, 240V/60HZ/1PH 3-WIRE, BY OTHERS
(SOURCE DU COURANT, 240V/60HZ/1PH 3-FILS, OU AUTRES)
L1
ARGO LOAD CENTER
(CENTRE DE CHARGE ARGO)
HIGH LIMIT SAFETY SWITCH, AUTO RESET
(INTERRUPTEUR DE SÉCURITÉ DE LIMITE SUPÉRIEURE,
REMISE EN MARCHE AUTOMATIQUE)
RED (ROUGE)
HIGH LIMIT SAFETY SWITCH, AUTO RESET
(INTERRUPTEUR DE SÉCURITÉ DE LIMITE
SUPÉRIEURE, REMISE EN MARCHE AUTOMATIQUE)
FACTORY INSTALLED JUMPERS
(CALVALIERS INSTALLÉES Á ĽUSINE)
RED (ROUGE)
RED (ROUGE)
THERMOSTAT, BY OTHERS
(THERMOSTAT, OU AUTRES)
WHT (BLANC)
WHT/BLK (BLANC/NOIR)
RTD WATER TEMPERATURE SENSOR
(CAPTEUR DE LA TEMPÉRATURE DE ĽEAU RTD)
WHT/BLK (BLANC/NOIR)
WIRING DIAGRAMS
Figure 8B
THERMOSTAT INSTALLATION
1. Install thermostat on inside wall five feet above
floor.
4. Instructions for final adjustment of thermostat
(adjusting heating anticipator, calibration, etc.) are
packaged with thermostat. Recommended setting
for heating anticipator is 0.1 amps.
2. NEVER install thermostat on outside wall.
3. Do not install thermostat where it will be affected by
sunlight, drafts, televisions, lighting fixtures, hot or
cold pipes, fireplaces, or chimneys.
NOTE: Your Argo AT Boiler will work
with standard and programmable
setback thermostats.
Some programmable thermostats
may cause boiler control T-T LED
to flicker on and off when there is
no call for heat, your thermostat
will require an external 24V power
supply (transformer) and isolation
relay or Argo AR822 control.
STARTUP AND SEASONAL Maintenance
Use qualified service agency for annual inspection of
boiler and heating system.
3. Set boiler operating temperature to designed heating
water temperature by adjusting potentiometer dial
located on top center of controller (Figure 4). Adjust
arrow on temperature adjustment dial to water
temperature required.
CAUTION
!
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after service.
NOTICE
Boiler is equipped with high-limit temperature
device set at 200° F as safety limit control.
High limit temperature device has automatic
reset function will reset at 170° F.
Hydronic block is now ready to be put into service.
1. Verify hydronic block circuit breaker or switch at service
entrance and, depending on option, hydronic block
circuit breakers within unit are in "Off" position.
4. Turn on hydronic block circuit breaker at service
NOTICE
entrance and/or disconnect switch, depending on
option, and 15 amp circuit breaker on hydronic block.
5. Set one thermostat above room temperature. Circulator
pump will now operate.
Only propylene glycol can be used in heating
system to prevent freezing. Recommendation
is maximum 40% or less propylene glycol
mixture to ensure proper operation of electric
boiler.
6. Check system again for leaks. Allow circulator pump to
run until all air has been vented from system. Gurgling
or rushing sound indicates presence of air.
7. Hydronic block will start to produce heat. Listen for
2. Fill heating system with water until pressure is 10-15
air passing through system as water temperature
increases. Water pressure will rise somewhat as
temperature increases - this is normal as long as the
pressure remains less than 25 PSIG.
PSIG. Check for leaks, repair if necessary, purge all air
from system.
NOTICE
Failure to vent and keep air out of heating
system will result in damage to heating elements in hydronic block. Damage of this type
is not covered by manufacturer's warranty.
15
THERMOSTAT INSTALLATION
8. When thermostat calls for heat, circulator will be
energized and indicator LED will light. Heating elements
are energized with element indicator LEDs. Once boiler
water temperature reaches set point on temperature
adjustment dial, controller will regulate boiler by
staging its elements. Number of elements which stay
on is based on heating demand and set point of boiler
water temperature. After all room thermostats are
satisfied with heat, controller de-energizes elements
one after another, and switches pump off after 3
minutes.
TROUBLESHOOTING
3. Close feed line valve if using automatic fill.
This section is to assist service technician when
trouble shooting electric boiler. It is important to
isolate before proceeding. Control error codes can be
helpful identifying cause of problem. If you suspect
wiring fault, check all external wiring and wiring
connections following wiring diagram label on inside
of boiler's cover. Additional wiring diagram is included
with this manual.
4. Open drain valve and allow water to drain from boiler.
Manual operation of relief valve will assist drainage by
allowing air to enter.
5. Remove cabinet cover and disconnect two wires
attached to effected heating element.
noisy boiler
6. Remove four bolts securing heating element to casting
1. Check water pressure of boiler. Should be 15-25 PSIG.
pry element loose. Take note of markings on element
flange to assure proper reinstallation.
2. Check for air within system.
7. After element has been removed, carefully clean any
remaining gasket material from casting surface. Take
care not to scratch or score surface.
WARNING
!
Take extreme care when boiler cover is
removed. Turn “OFF” all service to boiler.
"Power On” checks should be made by
qualified electrician.
8. Install new gasket and heating element while assuring
element is correctly positioned.
9. Close relief valve. Open feed line valve and check for
leaks. Open gate valves. Install heating element wires
and cabinet cover.
heating element change
Heating element change, use following procedure:
1. Turn off hydronic unit circuit breaker at service en-
10. Refer to "Startup and Seasonal Maintenance" for proper
trance and/or disconnect switch.
purging of air prior to energizing heating elements.
2. Close gate valves near inlet and outlet of hydronic
block.
Problem
Cause
Solution
No heat when called by
thermostat and “TT” LED
is NOT lit
Thermostat
Disconnect thermostat from control, momentarily place a jumper across
terminal “TT” & “TT.” If circulator starts, trouble is in thermostat.
No power to board
Confirm control’s On/Off switch is in “ON” position, check 15A circuit
breaker or fuse.
“Circ” LED is NOT lit
when thermostat is calling
Safety fault
Check for open contact on safety’s. Confirm continuity across terminals.
No power to board
Confirm control’s On/Off switch is in “ON” position
“Safety Switch” LED is
NOT lit when thermostat
is calling
Safety fault
Check for open contact on safety’s. Confirm continuity across terminals.
No power to board
Confirm control’s On/Off switch is in “ON” position.
“FAULT” LED is flashing
Safety fault
Refer to “Fault” codes
16
maintenance
Hydronic block requires only minimum of periodic
maintenance. Preventive maintenance tasks
described below are not difficult and when done
annually, will aid unit to continue its trouble free
operation.
figure 9
CAUTION
!
Turn off main power switch to block at main
service entrance before any work requiring
removal of cover is done for safety. All work
shall be performed by qualified service
personnel familiar with unit's control system
operation.
1. Boiler is designed to provide years of trouble free performance under normal operating conditions. Owner should
conduct general external examination at beginning of
each heating season and at mid-heating seating season to assure good working performance continues. A
qualified service technician should examine at least once
every year.
2. Do not store anything against boiler or allow dirt or
debris to accumulate in area immediately surrounding
boiler.
If relief valve fails to close completely after cycling,
remove it for cleaning or replacement. Turn off power
to boiler and isolate hydronic block by shutting off inlet
and outlet gate valves. Reduce water pressure to zero
by opening relief valve. Remove relief valve and inspect
valve disc and seat. Cleaning parts with clean lint free
cloth may be all that is necessary. If this procedure
fails replace valve with new one of equal pressure and
discharge rating. After installing cleaned or new relief
valve, open gate valves and follow procedure described
in “Startup and Seasonal Maintenance" on page 15.
3. Elements will burn out if not filled with water when
electrical power is turned on. Do not connect thermostat wire until system has been filled with water. Drain
water out of system only when absolutely necessary
to make repairs or prevent freeze-up during extended
cold weather shutdown.
4. Temperature and pressure gauge should be checked
frequently. During normal operating conditions, pressure should be stable throughout heating season. If
pressure under normal operating conditions consistently rises and falls over period of time, this can indicate fill valve leak, system leak, or compression tank
malfunction. Leaks anywhere must be repaired without
delay. If leaks or significant pressure fluctuations are
observed, call for service immediately.
6. Inspect and check field entrance wire connections
to unit for any signs of looseness or over heating.
Verify wire lugs are tight and torqued to manufacture
recommended settings - see Table B.
5. Check pressure relief discharge piping to assure
discharged water will be properly routed to suitable
container or drain. Manually operate pressure relief
valve by pulling lever at end of valve until lever is in
line with center-line of valve. (Figure 9) Close valve
to avoid losing excessive amount of water. Repeat
this procedure several times on quick cycling basis
to release any sediment that could block relief valve
pressure sensing mechanism. On heating system using
manual water make-up or feed mechanism, do not to
allow system pressure to drop to 0 PSI when cycling
relief valve. Allowing condition to occur could cause
air to enter system requiring purging as described in
“Startup and Seasonal Maintenance" on page 15.
17
parts list - 2 element electric boilers
1
2
3
44
55
11
2 element boiler
(side view)
4
11
5
8
88
99
10
10
9
2 element Boiler
with power block
2 element Boiler
with breakers
6
77
66
2 Element Electric Boiler w/Breakers
Item
Part
Number
10
7
2 Element Electric Boiler w/Power Block
Description
Item
Part
Number
Description
1
S47
Safety Limit Control (High Limit - Fixed Temp)
1
S47
Safety Limit Control (High Limit - Fixed Temp)
2
G12
Gasket - Heating Element
2
G12
Gasket - Heating Element
3
E13
Heating Element - 3 KW/240 Volt
3
E13
Heating Element - 3 KW/240 Volt
E14
Heating Element - 4 KW/240 Volt
E14
Heating Element - 4 KW/240 Volt
E15
Heating Element - 5 KW/240 Volt
E15
Heating Element - 5 KW/240 Volt
E16
Heating Element - 6 KW/240 Volt
E16
Heating Element - 6 KW/240 Volt
Z3002
Control Board - 2 Element Boiler
Z3002
Control Board - 2 Element Boiler
4
5
4
240004757 RTD Sensor
5
240004757 RTD Sensor
Neutral Terminal Block
6
B194
Ground Connection Lug
7
L9
Ground Connection Lug
B28
Circuit Breaker 15 A - 1 Pole - G.E. THQP 115
8
F3
Fuse Block, 1/4” x 1-1/4” Fuse, 300V
9
B27
Circuit Breaker 40 A - 2 Pole - G.E. THQP 240
9
F4
Fuse, 10amp, Ceramic, ABC-10
10
I25
Load Center Assembly - G.E. TLM812U2
10
P8
Power Distribution Block
6
B194
7
L9
8
11
240004756 Brass Well
-
V1
-
1260006
-
C57
-
Z302A
11
Neutral Terminal Block
240004756 Brass Well
Relief Valve - 30 PSI
-
V1
Temperature/Pressure Gauge
-
1260006
Pressure Vessel - Cast Iron, 2 Element
-
C57
Pressure Vessel - Cast Iron, 2 Element
Control Panel Assembly, 2 Element (Complete)
-
Z313
Control Panel Assembly, 2 Element (Complete)
18
Relief Valve - 30 PSI
Temperature/Pressure Gauge
parts list - 4 element electric boilers
1
2
3
4
11
5
4 element boiler
(side view)
4
5
11
8
8
9
10
9
4 element Boiler
with power block
4 element Boiler
with breakers
6
7
6
4 Element Electric Boiler w/Power Block
4 Element Electric Boiler w/Breakers
Item
Part
Number
1
S47
Safety Limit Control (High Limit - Fixed Temp)
2
G12
Gasket - Heating Element
E13
Heating Element - 3 KW/240 Volt
E14
Heating Element - 4 KW/240 Volt
E15
Heating Element - 5 KW/240 Volt
E16
Heating Element - 6 KW/240 Volt
Z300
Control Board - 4 Element Boiler
3
4
5
7
L9
8
B28
Circuit Breaker 15 A - 1 Pole - G.E. THQP 115
9
B27
Circuit Breaker 40 A - 2 Pole - G.E. THQP 240
10
I25
Load Center Assembly - G. E. TLM812U2
Ground Connection Lug
V1
-
1260006
-
C32
-
Z304A
S47
Safety Limit Control (High Limit - Fixed Temp)
G12
Gasket - Heating Element
3
E13
Heating Element - 3 KW/240 Volt
E14
Heating Element - 4 KW/240 Volt
E15
Heating Element - 5 KW/240 Volt
E16
Heating Element - 6 KW/240 Volt
Z300
Control Board - 4 Element Boiler
Relief Valve - 30 P.S.I.
Pressure/Temperature Gauge
Pressure Vessel - Cast Iron, 4 Element
Control Panel Assembly, 4 Element (Complete)
19
240004757 RTD Sensor
Neutral Terminal Block
6
B194
7
L9
Ground Connection Lug
8
F3
Fuse Block, 1/4” x 1-1/4” Fuse, 300V
9
F4
Fuse, 10amp, Ceramic, ABC-10
10
P8
Power Distribution Block
11
240004765 Brass Well
-
Description
2
5
Neutral Terminal Block
Part
Number
7
1
4
240004757 RTD Sensor
B194
11
Item
Description
6
10
240004756 Brass Well
-
V1
-
1260006
Relief Valve - 30 P.S.I.
-
C32
Pressure Vessel - Cast Iron, 4 Element
-
Z314
Control Panel Assembly, 4 Element (Complete)
Pressure/Temperature Gauge
additional wiring diagrams
ONE SINGLE ZONE
THERMOSTAT
SPST(2 WIRE)
24 VAC
"AT" BOILER
TT
TT
C1 C2
CIRCULATOR
PUMP 120 VAC
CIR.
SINGLE ZONE WITH CIRCULATOR
2 BOILERS
THERMOSTAT
Description
13
R35C
Relay 10A 24VAC
240004745
Relay Base, DIN Rail
Mount
240004746
DIN Rail Approximatly
2" long
14
ISOLATION
RELAY
ARGO
AR822-2II
C
T
W
T
R
5
6
6
NO
5
NC
9 8
12
NOTE:
NUMBERS REFER TO NUMBER
DESIGNATIONS ON RELAY BASE, SEE BELOW.
ELECTRONIC FUSE
Item
Number
FACTORY INSTALLED
JUMPER
L2
L1
3
4
NO
4
NO
N
120VAC
8
4
L
5
1
RELAY
RELAY
BASE
CIR.
SECONDARY
CIRCULATOR
PUMP 120 VAC
DIN RAIL
"AT" BOILER
14
13
9
12
NOTE:
ABOVE NUMBERS REFER TO NUMBER
DESIGNATIONS ON RELAY BASE
"AT" BOILER
TT
TT
TT
TT
C1 C2
C1 C2
PRIMARY
CIRCULATOR
PUMP 120 VAC
CIR.
PRIMARY
CIRCULATOR
PUMP 120 VAC
CIR.
20
additional wiring diagrams
TWO ZONES WITH CIRCULATORS
2 BOILERS
ZONE 1
ZONE 2
THERMOSTAT
SPST (2 WIRE)
24 VAC
TR TW
TR TW
ZONE 1
ZONE 2
THERMOSTATS
ARGO
ARM-2P
ISOLATED
SWITCH
X1 X1
X2
X2
ZONE 1
L N
120
VAC
L N
ZONE 2
L N
120 VAC
CIR.
CIR.
"AT" BOILER
CIRCULATOR PUMPS
(120 VAC)
NOTE:
IF CONTROL ONLY CONTAINS ONE ISOLATED
END SWITCH, PLEASE CONTACT TECHNICAL
SERVICE FOR PROPER INSTALLATION.
"AT" BOILER
TT
TT
TT
TT
C1 C2
C1 C2
PRIMARY
CIRCULATOR
PUMP 120 VAC
PRIMARY
CIRCULATOR
PUMP 120 VAC
CIR.
CIR.
THREE ZONES WITH ZONE CONTROL VALVES
2 BOILERS
ZONE 1
ZONE 2
ZONE 3
THERMOSTAT
SPST (2 WIRE)
24 VAC
T T
ZONE 1
ARGO
AZ-3
T T
ZONE 2
T T
ZONE 3
THERMOSTATS
END
SWITCH
X1 X1
X2 X2
ZONE 1
ZONE 2
ZONE 3
ZONE
VALVE
ZONE
VALVE
ZONE
VALVE
"AT" BOILER
"AT" BOILER
TT
TT
TT
TT
C1 C2
C1 C2
PRIMARY
CIRCULATOR
PUMP 120 VAC
PRIMARY
CIRCULATOR
PUMP 120 VAC
CIR.
CIR.
21
additional wiring diagrams
THREE ZONES WITH CONTROL VALVES
ZONE 2
ZONE 1
ZONE 3
THERMOSTAT
SPST (2 WIRE)
T T
ZONE 2
T T
ZONE 1
ARGO
AZ-3
T T
ZONE 3
THERMOSTATS
END
SWITCH
X X
ZONE 1
ZONE 2
ZONE 3
ZONE
VALVE
ZONE
VALVE
ZONE
VALVE
"AT" BOILER
TT
TT
C1 C2
PRIMARY
CIRCULATOR
PUMP 120 VAC
CIR.
THREE ZONES WITH CIRCULATORS
ZONE 2
ZONE 1
ZONE 3
THERMOSTAT
SPST (2 WIRE)
TR
TW
TR
TW
TR
TW
THERMOSTATS
ARGO
ARM-3P
ISOLATED
SWITCH
X X
ZONE 1
L N
ZONE 2
L N
ZONE 3
L N
CIR.
CIR.
CIR.
120 VAC
L N
120 VAC
CIRCULATOR PUMPS
(120 VAC)
"AT" BOILER
TT
TT
C1 C2
PRIMARY
CIRCULATOR
PUMP 120 VAC
CIR.
22
6!,6%
&,/7
6!,6%
6!,6%
6!,6%
23
$2!).
6!,6%
!2'/
%,%#42)#
"/),%2
"/),%2
05-0
6!,6%
6!,6%
!)23%0%2!4/2
&,/7
-!8
!54/-!4)#!)26%.4
#)2#5,!4/2
05-0
#)2#5,!4/2
05-0
#)2#5,!4/2
05-0
02%3352%4%-0%2!452%
'!5'%
%80!.3)/.
4!.+
&),,
6!,6%
&,/7
&,/7
&,/7
02)-!29
,//0
$2!).
&,//2
6!,6%
&,/7
-!8
6!,6%
6!,6%
6!,6%
!2'/
%,%#42)#
"/),%2
6!,6%
"/),%2
05-0
&,/7
02%3352%4%-0%2!452%
'!5'%
0)0%4/7)4()./&&,//2
02%3352%
2%,)%&6!,6%
3%#/.$!29
,//0
&,/7
3500,9(%!$%2
(%!4).':/.%
(%!4).':/.%
(%!4).':/.%
-/$5,!2"/),%20)0).'
0)0%4/7)4()./&&,//2
3%#/.$!29
,//0
02%3352%
2%,)%&6!,6%
&,/7
&,/7
modular boiler piping
troubleshooting - flowchart#1
WARNING
!
Due to exposure to potentially dangerous voltages, troubleshooting should be performed
by a qualified installer or service agency only.
Failure to do so could result in property damage, personal injury, or loss of life.
Green T-T indicator LED is
on; there is a call for heat.
Yes
Is audible alarm sounding
and red fault LED flashing?
Yes (see Flowchart #3)
No (See Flowchart#2)
No
Verify the boiler control
board switch is on.
UNITS WITH CIRCUIT
BREAKERS
Verify that the 15amp/
120vac circuit breaker is on.
If breaker is off, turn it on.
UNITS WITH POWER
BLOCKS
Verify that the ceramic fuse
is good. If fuse is blown,
replace it with a new one.
OK
OK
Verify that the thermostat
is operational and calling
for heat. Disconnect TT/TT
wires from boiler control
board and replace with a
jumper if necessary. The
T-T indicator LED should
come on with the jumper
installed.
Lights come on with jumper
and elements then energize
Potentially bad thermostat.
Consult thermostat
manufacturer’s manual or
replace thermostat.
LED light/boiler off
with jumper installed
Verify 120vac is present at
the L-N terminals on the
printed circuit board labeled
“120vac Input.”
120vac not present
120vac
present
Replace control board.
Verify that 240vac is
present across L1 and L2.
240vac present
Replace circuit breaker or
power block, depending
on type of boiler.
24
240vac not present
Check service at main load
center.
troubleshooting - flowchart#2
No (From Flowchart#1)
Is the circulator indicator
LED on?
No
Verify power
supply to
system.
OK
Verify 120vac
power to
Board L-N.
OK
Yes
Verify that circulator is
operating properly.
No
No
Verify that 120vac is present
at the circulator terminals.
Replace the boiler control
board.
Yes
Yes
Verify circulator wiring or
replace circulator.
OK
After 30 seconds does an
element energize?
No
Verify that 40 amp circuit
breakers are on.
Not On
Turn on all 40 amp circuit
breakers.
All
On
All
On
Verify that 240vac is present at the input to the boiler and the output
of all boiler circuit breakers.
240vac present
240vac not present
Check
element for
power.
No
Power
Replace electric boiler
control board.
Yes
Is there an increase in
temperature?
Yes
Boiler functioning properly.
No
Verify that 240vac is present at the element.
240vac
not
present
240vac present
Remove leads to elements
and verify ohm reading
at each element stud.
Reading should be between
9-12 ohms at each element.
OK
Replace element if ohm reading is not within proper range.
25
Replace circuit breakers.
Check element wires, main
power supply, and/or replace
electric boiler control board.
(From
Flowchart#1)
Yes
26
Replace high limit control
switches.
Yes
Does visual/audible alarm
shut off with jumper installed?
OK
Remove leads from HL-HL
terminals on control board
and test with a jumper.
OK
Safety Switch Fault.
Yes
Is visual/audible alarm
flashing/pulsing once?
No
No
OK (See
Flowchart#4)
Remove leads from
LWC-LWC and test with a
jumper.
Yes
Is a low water cut-off
installed?
OK
Remove jumper from
HL-HL terminals and replace leads.
Stuck/welded element relay
contact. Replace electric
boiler control board.
Yes
Is visual/audible alarm
flashing/pulsing twice?
No
No
Yes
Is a flow switch installed?
RTD short. Follow steps on
page 10 to check RTD and
replace if necessary.
Yes
Is visual/audible alarm
flashing/pulsing three
times?
No
No
A
B
RTD open. Follow steps on
page 10 to check RTD and
replace if necessary.
Yes
Is visual/audible alarm
flashing/pulsing four times?
C
troubleshooting - flowchart#3
troubleshooting - flowchart#4
A
OK (From
Flowchart#3)
Does visual/audible alarm
shut off with jumper installed?
Remove jumper from
LWC-LWC and replace
LWC-LWC leads.
No
B
C
OK
Yes
Yes
Check water supply and
water level in system. Fill
system if low. Does visual/
audible alarm shut off with
system full?
Remove leads from
flow-flow and test with a
jumper.
Check pump and flow
rate of system. Pump may
require replacement. Does
visual/audible alarm shut off
with a new pump?
No
Potentially bad low water
cut-off. Check wiring to
LWCO and consult LWCO
manufacturer if necessary.
Yes
OK
Yes
Does visual/audible alarm
shut off with jumper installed?
No
No
Potentially bad flow switch.
Check wiring to flow switch
and consult flow switch
manufacturer if necessary.
Remove jumper from
flow-flow and replace leads.
OK
"at" series boiler dimensions
d
C
e
a
B
Dimensions
A
B
C
D
E
14-5/8”
18-5/8 “
9-1/32”
14-3/8”
16-15/32”
27
Inlet & Outlet Approximate
Pipe Size
Shipping Wt.
1-1/4” NPT
70 lbs.
homeowner's reference table
homeowner's reference table
Model Number:_ _____________________________________________
Serial Number:_______________________________________________
Date Installed:_ ______________________________________________
Contractor:__________________________________________________
Contact:_ ___________________________________________________
Address:____________________________________________________
___________________________________________________________
Telephone Number:___________________________________________
After Hours Number:__________________________________________
If different from Installation Contractor:
Service Tech:________________________________________________
Telephone Number:___________________________________________
After Hours Number:__________________________________________
ECR International Inc.
2201 Dwyer Avenue
Utica, NY 13501
www.ecrinternational.com
www.argocontrols.com
28