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14
H. Electrical
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 10 and/or 11.
I. 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 – Connect the system circula-
tor wire leads to the proper locations on the
Aquastat control, L8124C/L8148A. See Figure 10 or
11. 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 – Read,
understand and follow all of the instructions
provided with the Honeywell R8888 control.
7. Conventional Zone Valve Zoned System – 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.
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.
DANGER
Positively assure all electrical connections are unpowered before attempting installation or
service of electrical components or connections of the boiler or building. Lock out all electrical
boxes with padlock once power is turned off.
WARNING
Failure to properly wire electrical connections to the boiler may result in serious physical
harm.
Electrical power 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 wiring diagrams contained in this manual are for reference purposes only. Refer to the
wiring diagram of any controls used with the boiler. Read, understand and follow all wiring
instructions supplied with the controls.