PB Heat MI/MIH series - Manual (Page 18)

A. WIRING
1. See Figure 6.1 for location of wiring and controls.
Use Figures 6.2 and 6.3 to connect the boiler to a
power supply and to connect components to the
boiler.
2. Connect the boiler by a separate, permanently live
electrical supply line with a fused switch.
3. Connect the vent damper harness to the damper
motor as shown in Figure 6.1.
4. Adjust the thermostat heat anticipator to 0.2 Amp.
B. ZONED SYSTEM WIRING
See Figure 6.5 for typical wiring with zone valves. See
Figure 6.6 for typical wiring with zone circulators. When
wiring a zoned heating system, follow all applicable
codes, ordinances and regulations.
C. CONTROLS
1. For proper location of controls and accessories refer
to Figure 6.1 and Section 11.
2. See the attached control sheets for specific details
regarding the installation of the various controls.
3. This boiler is supplied with safety devices in addition
to the limit. For a description of these devices and
how they work to ensure the safe operation of the
boiler, see Section 7B.
4. If the circulator is mounted in the supply piping,
provide longer wiring harness as required.
ELECTRICAL
6. ELECTRICAL
This unit 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 current edition of the
National Electrical
Code, ANSI/NFPA 70 and/or the Canadian Electrical Code, Part 1 CSA C22.1, Electrical Code.
NOTICE
Figure 6.1: Wiring, Controls and Safety Devices
Install all electrical wiring in accordance with the National Electrical Code and local requirements.
Do not power zone valves directly from the boiler
limit. Doing so will greatly reduce the life of the
transformer. Use a separate transformer sized to
handle the total of all zone valve electrical loads.
NOTICE
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