Electrical And Sequence Of Operation - Burnham BOILERS Operating/Service Instructions Manual

V. Electrical
Positively assure all electrical connecti ons are unpow ered before attempting installation or
service of elec tric al components or connections of the boiler or bui lding. Lock out all ele ctrical
boxes wi th pa dlock once power is turned off.
Failure to properly wire electrical connections to the boiler may result in serious physical
harm.
Electrical pow er may be from more than one source. Make sure all power is off before
attempting any electrical work.
Each boiler must be protected with a properly sized fused disconnect.
Never jump out or make inoperative any safety or operating controls.
The w iring diagrams contained in this manual are for reference purposes only. Refer to the
w iring diagram of any controls used with the boiler. Read, understand and follow all wiring
instructions supplied with the controls.
A
. General
1. Install wiring and electrically ground boiler in
accordance with requirements of the authority
having jurisdiction, or in absence of such require-
ments the National Electrical Code, ANSI/NFPA
70, and/or the CSA C22.1 Electric Code.
2. A separate electrical circuit should be run from the
main electrical service with a fused disconnect
switch in the circuit.
3. Wiring should conform to Figure 14 and/or 15.
B
. System Controls and Wiring
1. Refer to National Electric Code or Local Electric
Codes for proper size and type of wire required.
Follow Code.
2. Use anti-short bushings on all wiring passing
through boiler jacket, junction boxes and/or control
boxes.
3. Use armored cable (BX) over all exposed line
voltage wiring.
4. If an Alliance indirect water heater is used, use
priority zoning. Do not use priority zoning for
Hydro-Air Systems.
5. Single Zone System – Refer to Figure 14 or 15 of
DANGER
WARNING
this manual for the electrical diagram for this type
of system. Connect the system circulator wire leads
to the proper locations on the Aquastat control,
L8124C/L8148A. See Figure 14 or 15. Connect
the thermostat to the 'T-T' terminals on the
L8124C/L8148A control. Set thermostat heat
anticipator settings to 0.60 amps.
6. Conventional Circulator Zoned System – Refer to
Figure 16 of this manual for the electrical diagram
for this type of system.
Read, understand and follow all of the instructions
provided with the Honeywell R8888 control.
7. Conventional Zone Valve Zoned System – Refer to
Figure 17. Wiring to the most popular models of
zone valves are given in Figure 18.
Locate C1 and C2 inside the L8124C Honeywell
control. Connect the two (2) terminals to the
system circulator wire leads, supplied with boiler.
Connect the H1 and H2 terminals inside the R8889
to the 'T-T' terminals in the L8124C Honeywell
Control. Refer to Figure 17.
Connect the thermostat of each zone and the
circulator for that zone to R8889 panel. If an
Alliance indirect water heater is used, connect the
Alliance thermostat and circulator to the Zone 1
terminals of the R8889. Set thermostat anticipator
settings to 0.12 amps.
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