5 Electrical connections
Boiler operating control module
The operating control for the appliance is the SMART SYSTEM control module. It is located on the inside of the control panel, behind the front access door. Access to adjust the temperature set point and other user adjustable points is made through the Operator Interface located on the front access door. The outlet sensor is installed in the outlet side of the heat exchanger top header. The inlet sensor is located on the inlet side of the heat exchanger top header.
The operating sensor, inlet or outlet, is selectable from the screen in the Operator Interface.
The exact temperature set point is based on the system’s requirements. Set the control set point(s) to the desired operating water temperature.
The maximum temperature set point that can be programmed into the control module from the Operator Interface on a
Installation & Operation Manual
TABLE - 5A
AMP DRAW DATA
Model | Controls | Blower | Pump | Approximate Total | |
FLA* | Amps @ 120 VAC | ||||
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| |||
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|
| |
402 | 3.6 | 2.7 | 5.8 | 12.1 | |
502 | 3.6 | 2.7 | 5.8 | 12.1 | |
652 | 5.4 | 3.4 | 5.8 | 14.6 | |
752 | 5.4 | 3.4 | 5.8 | 14.6 | |
992 | 7.3 | 3.2 | 7.4 | 17.9 | |
1262 | 7.3 | 3.2 | 7.4 | 17.9 | |
1442 | 7.3 | 6.7 | 7.4 | 21.4 | |
1802 | 7.3 | 6.7 | 7.4 | 21.4 | |
2072 | 7.3 | 6.7 | 7.4 | 21.4 |
*Standard Pump Supplied with Water Heaters Only
heating boiler is 220°F (104.4°C). The manual reset high limit control for a heating boiler is adjustable up to a fixed maximum setting of 230°F (110°C).
The maximum temperature set point for a water heater is 190°F (88°C). The auto reset high limit is fixed at 200°F (93°C), and the adjustable manual reset high limit has a maximum setting of 230°F (110°C).
A 120 VAC, 15 Amp, 1 ph, 60 Hz circuit is required for operation of the appliance controls.
The appliance, when installed, must be electrically grounded in accordance with the requirements of the authority having jurisdiction or in the absence of such requirements, with the latest edition of the National Electrical Code ANSI/ NFPA No. 70. When the unit is installed in Canada, it must conform to the CAE C22.1, Canadian Electrical Code, Part I and/or local Electrical Codes. Multiple units connected in a
WARNING
NOTICE
CAUTION
ELECTRICAL SHOCK HAZARD – For your safety, turn off electrical power supply before making any electrical connections to avoid possible electric shock hazard. Failure to do so can cause severe personal injury or death.
Wiring must be N.E.C. Class 1.
If original wiring as supplied with the boiler must be replaced, use only type 105°C wire or equivalent.
Boiler must be electrically grounded as required by National Electrical Code ANSI/ NFPA 70 – latest edition.
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation.
Cascade must be grounded to the same ground connection.
1.All wiring between the appliance and field installed devices shall be made with type T wire [63°F (35°C) rise].
2.All line voltage wire exterior to the appliance must be enclosed in approved conduit or approved metal clad cable.
3.The circulating pump must run continuously when the appliance is being fired.
4.To avoid serious damage, DO NOT energize the appliance until the system is full of water. Ensure that all air is removed from the heat exchanger and piping before beginning initial operation. Serious damage may result if the appliance is operated without proper flow.
5.Provide the appliance with proper overload protection.
Installation must comply with:
1.National Electrical Code and any other national, state, provincial, local codes, or regulations.
2.In Canada, CSA C22.1 Canadian Electrical Code Part 1, and any local codes.
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