Argo AT0623 Installation, Operation & Maintenance Manual
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23 ADDITIONAL WIRING DIAGRAMS Figure 11 - Single Zone with Circulator - 2 Boilers (1/16 Hsp. Max.) (1/16 Hsp. Max.) 1/16 HSP MAX 1/6 hp MAX 1/6 hp MAX. R(T) W(T) R(T) W(T) ISOLATION RELAY ITEM NUMBER DESCRIPTION R35C Relay 10A 24VAC 240004745 Relay Base, DIN Rail Mount 240004746 DIN Rail Approx. 2" Long
Argo AT0623, 11 Field Wiring - Continued Limit Control Operation 1. MAIN POWER SUPPLY: Depending on model designation, the electric Hydronic Block may be energized by alternating current service entrances: 240 volt single phase 50 or 60 cycle 3 wire plus ground. Wire size see Table 1. Sizes listed for various capacity units include total amperes necessary to operate elements, circulator and zone valves where used. Wire sizes specied 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. A. Read data name plate before c
Argo AT0623, 3 A B C D Dimensions Inlet & Outlet Pipe Size Approximate Shipping Wt. A B C D E 14⅝” 18⅝ “ 9¹/₃₂” 14⅜” 16¹⁵/₃₂” 1¼ NPT 70 lbs. "AT" SERIES BOILER DIMENSIONS E
Argo AT0623, 22 Hydronic block requires minimum periodic maintenance. Annual maintenance allow for trouble free operation. 1. Boiler is designed to provide years of trouble free performance under normal operating conditions. Conduct general external examination at beginning of each heating season and at mid-heating seating season to assure good working performance continues. A qualied 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. 3. Elements will burn out if boiler
Argo AT0623, 26 ARGO ELECTRIC BOILER DRAIN VALVE PRESSURE/TEMPERATURE GAUGE PRESSURE RELIEF VALVE PIPE TO WITHIN 6" OF FLOOR BOILER PUMP VALVE FLOW FLOW 12" MAX FLOOR ARGO ELECTRIC BOILER DRAIN VALVE PRESSURE/TEMPERATURE GAUGE PRESSURE RELIEF VALVE PIPE TO WITHIN 6" OF FLOOR BOILER PUMP VALVE FLOW FLOW 12" MAX FLOW SUPPLY HEADER FILL VALVE VALVE EXPANSION TANK AIR SEPERATOR AUTOMATIC AIR VENT FLOW FLOW FLOW FLOW VALVE VALVE VALVE VALVE HEATING ZONE 1 HEATING ZONE 2 FLOW VALVE VALVE HEATING ZONE 3 MODULAR BOILER PIPING CIRCULATOR PUM
20 R (T) W (T) C DHW ODT ODT LMC DHW DEMAND PUMP POMPE LMC T Aux T Aux HL HL FLO LWC LWC WT FLO WT RED RED RED NEUTRAL BLOCK N MISE À LA TERRE DE L'APPAREIL FIELD SUPPLIED POWER PER NEC, CEC AND LOCAL CODES EQUIPMENT GROUND L1 L2 GN BLK WHT WT SENSOR RED RED RED HIGH LIMITS LOAD CENTER PANNEAU DE DISTRIBUTION NEC CLASS 2 LOW VOLT CONNECTIONS Low Volt Connections R (T) W (T)
Argo AT0623, 19 R (T) W (T) C DHW ODT ODT LMC DHW DEMAND PUMP POMPE LMC T Aux T Aux HL HL FLO LWC LWC WT FLO WT RED RED RED NEUTRAL BLOCK N MISE À LA TERRE DE L'APPAREIL FIELD SUPPLIED POWER PER NEC, CEC AND LOCAL CODES EQUIPMENT GROUND L1 L2 GN BLK WHT WT SENSOR RED RED RED HIGH LIMITS LOAD CENTER PANNEAU DE DISTRIBUTION NEC CLASS 2 LOW VOLT CONNECTIONS Low Volt Connections R (T) W (T) C Domestic Hot Water Thermostat DHW Not UsedODT Load Management ControlLMC Auxillary Appliance T Aux High Limit HL Flow AlarmFLO Low Water AlarmLCO Water Temperature Sens
Argo AT0623, 14 SEQUENCE OF OPERATION User Settings Display Possible Value Factory Setting Overview On/Off Mode ON ON OFF Press and hold the MODE/PWR button for 2 seconds to turn the unit On or Off. OFF OFF Note: When electrical power has been removed and re-applied, when the unit is turned on it will automatically enter a dry re test mode (If dFt is on, see Conguration). The display will ash dFt. To bypass the test, Press and hold Up ▲ and Down ▼ arrow buttons for 2 seconds. To access the following: Unit must be in the “ON” Mode. Press the MODE/PWR button to select setting. Press the up ▲ or down ▼ arrow buttons to ch
25 "AT" BOILER C1 C2 CIR. CIRCULATOR PUMP 120 VAC TT TT PRIMARY X X ZONE 1 ZONE 2 T T SWITCH END ZONE 1 THERMOSTAT SPST (2 WIRE) ARGO AZ-3 ZONE 2 ZONE 1 ZONE 3 T T ZONE 2 T T ZONE 3 ZONE 3 ZONE VALVE ZONE VALVE ZONE VALVE THERMOSTATS THREE ZONES WITH CONTROL VALVES "AT" BOILER C1 C2 CIR. CIRCULATOR PUMP 120 VAC TT TT P
Argo AT0623, 27 TROUBLESHOOTING Heating Element Change Heating element change, use following procedure: Noisy Boiler • Check water pressure of boiler. Should be 15-25 PSIG. • Check for air within system. Install proper air vents and purge unit as necessary. 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
Argo AT0623, 16 CONTROL OPERATION Initial Start Up When electrical power is applied to AT boiler the control displays rmware revision code. It will then revert to mode it was in prior to power loss (factory setting is OFF mode). Pressing MODE/PWR button for 2 seconds, unit will enter ON mode. Pressing MODE/PWR button again for 2 seconds will return unit to OFF mode. Once in ON mode the control automatically begins a Dry Fire Test (if DFt is set to Y in the conguration) where pump is energized and rst element is pulsed. (see Dry Fire Test Mode). Dry Fire Test is only initi
Argo AT0623, 18 CONTROL OPERATION Boiler Fault Codes • Freeze Protection If the water temperature falls below 45°F (7°C) the control will automatically initiate a heat call sequence RW (TT) until the water temperature reaches 55°F (13°C). Boiler must be in ON mode for freeze protection to occur. • Relay Failure Alarm If a heating element relay fails the control shall switch off all heating elements and energize the pump. The audible alarm shall sound and the relay designator,” r1”,” r2”, “r3”, “r4” shall be displayed until the error clears and the power is reset. �
Argo AT0623, 29 TROUBLESHOOTING FLO Flow Switch Alarm Is ow switch installed? N - Check control board jumper is in place and secure. Tighten FLO screws if needed. Y - System air locked - Purge system and add venting as needed. Y - Check that ow switch is functioning properly. Conduct self test on ow switch (Consult manufactures instructions). LWC Low Water Cutoff Alarm Is LWCO Installed? N - Check control board jumper is in place and secure. Tighten LWC screws if needed. Y - System air locked - Purge system, add venting as needed. Y - System low on wat
Argo AT0623, 8 Circulating System • Design system as primary/secondary piping. Operate system with maximum output temperature of 180ºF (82°C) or lower and temperature rise across the unit of 20ºF (11°C) or lower. Refer to tables below and Figures 2 & 3. • 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 “AT” Series - 4 Element Boiler KW Capacity Minimum Flow Rate (GPM)* 12 4.1 16 5.5 20 6.8 24 8.2 * Flow rate based on 20°ΔT Connecting Supply And Return Piping 1. Hot water boilers
Argo AT0623, 12 ELECTRICAL CONNECTIONS Figure 7 - Wiring on Control Board Figure 8 - Low Voltage Wiring on Control Board Control Inputs (NEC Class-2 Low Voltage) R (T) Comfort Heating – Thermostat Input (R W C) or zone valve end switch (R W), Dry Contact Close R-W Activation, 24Vac R-C W (T) C DHW Domestic Hot Water – Thermostat Input. Dry Contact Close Activation DHW – DHW ODT Not Used *LMC Load Management Control Input. Dry Contact Normally Close LMC – LMC HL High Limit Input (Factory Installed) *FLO Flow Switc
Argo AT0623, 13 SEQUENCE OF OPERATION 1 Mode and Power Selection Button - Turns the boiler on and off, selects mode and conguration settings 2 Heating Demand LED Indicator – Energized when there is call for comfort heating or domestic hot water 3 Heating element LED Indicators – Energized with corresponding heating element 4 Pump LED Indicator – Energized with boiler pump relay 5 LED Display – Indicates water temperature, set point, mode, and error codes 6 Up and Down Adjustment Buttons – Used to
Argo AT0623, 4 IMPORTANT SAFETY INFORMATION NOTICE Used to address practices not related to personal injury. CAUTION Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. ! WARNING Indicates a hazardous situation which, if not avoided, could result in death or serious injury. ! DANGER Indicates a hazardous situation which, if not avoided, WILL result in death or serious injury ! 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. Become familiar with symbols identifying potential hazards. Keep this manual nea
Argo AT0623, 30 RESISTANCE VS. TEMPERATURE TABLE Resistance Vs. Temperature Table Temp Temp Ohms (Ω) (°C) (°F) 0 32.0 32,650 5 41.0 25,392 10 50.0 19,901 15 59.0 15,712 20 68.0 12,493 25 77.0 10,000 30 86.0 8,057 35 95.0 6,531 40 104.0 5,326 45 113.0 4,368 50 122.0 3,602 55 131.0 2,986 60 140.0 2,488 65 149.0 2,083 70 158.0 1,752 75 167.0 1,480 80 176.0 1,255 85 185.0 1,070 90 194.0 916 95 203.0 787 100 212.0 679
Argo AT0623, Model Number: _____________________________________________ Serial Number: ______________________________________________ Date Installed: ______________________________________________ Contractor: _________________________________________________ Contact: ___________________________________________________ Address: ___________________________________________________ ___________________________________________________________ Telephone Number: __________________________________________ After Hours Number: ________________________________________
Argo AT0623, INSTALLATION, OPER ATION & MAINTENANCE MANUAL An ISO 9001-2008 Certied Company Information and specications outlined in this manual in effect at the time of printing of this manual. ECR International, Inc. reserves the right to discontinue, change specications or system design at any time without notice and without incurring any obligation, whatsoever. "AT" SERIES ELECTRIC HOT WATER BOILERS FOR FORCED HOT WATER Manufactured by: ECR International, Inc. 2201 Dwyer Avenue, Utica
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