Finned copper tube gas boilers & water heaters – Boiler Manual
22
ELECTRICAL WIRING
Electrical Power Connections
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation! Verify proper operation after
servicing.
ATTENTION. Au moment de l'entretien des com-
mandes, étiquetez tous les fils avant de les débrancher.
Des erreurs de câblage peuvent entraîner un fonc-
tionnement inadéquat et dangereux. S'assurer que
l'appareil fonctionne adéquatement une fois l'entretirn
terminé.
The electrical connections to this boiler/water heater must be made
in accordance with all applicable local codes and the latest revision
of the National Electrical Code, ANSI /NFPA-70. Installation should
also conform with CSA C22.1 Canadian Electrical Code Part I if
installed in Canada.
Install a separate 120 volt 15 amp or 20 amp circuit breaker for the
boiler/water heater and pump, see Table 11. A properly rated shut-
off switch should be located at the boiler/water heater. The boiler/
water heater must be grounded in accordance with the authority
having jurisdiction, or if none, the latest revision of the National
Electrical Code, ANSI/NFPA-70.
Table 11 Dominator Electrical Requirements
Recommended
Dominator
Circuit Breaker
*Running
Model
(Amps)
Amps
DB/DW 300 - 600
15
3.9
DB/DW 750 - 900
15
6.0
DB/DW 1050 - 2100
20
11.4
*Use separate circuit breaker that is properly sized for pump and
pump contactor.
Line voltage field wiring of any controls or other devices must
conform to the temperature limitation of type T wire at
95°F
,
35°C
above room temperature. Use copper conductors with a minimum
size of #14 awg. Use appropriate wiring materials for units installed
outdoors. The wire size must be compatible with the total amp draw
of the circuit.
Refer to the wiring diagram supplied with the boiler/water heater
for proper wiring connections.
GENERAL OPERATION
Before proceeding read and fully understand the
instructions contained in this manual. Do not attempt
to operate this boiler/water heater if it has not been
installed in accordance with the guidelines set forth in
this manual. Failure to comply with this warning can
result in extensive property damage, severe personal
injury or death!
Should overheating occur or the gas supply fail to shut off, turn off
the manual gas control valve to the appliance. Do not interrupt water
flow through the boiler/water heater.
En cas de surchauffe ou si l'alimentation en gaz ne s'arrête pas, fermez
manuellement le robinet d'arrêt de l'admission de gaz.
Hydronic Heating Boilers
Open the make-up water valve and slowly fill the boiler and all
of the radiation with water. Ensure that all bleed and drain valves
are closed.
Adjust the make-up water pressure regulator so a minimum
12 psig
,
82.7 kPa
system pressure is maintained at the highest
point in the system piping. If a make-up water pump is used adjust
it to maintain a minimum
12 psig
,
82.7 kPa
system pressure.
Open the system bleed and drain valves, one at a time, to purge
the air trapped in the heating system piping.
With the boiler off, run the system pump for at least 30 minutes
and bleed the system piping using the bleed valves. If strainers are
used in the system piping, the make-up water valve should be closed
and the strainers checked and cleaned.
The system expansion tank should be checked to ensure that the
correct water level in the tank is maintained. The tank should be
less than half full of water with the system full and adjusted to the
correct operating pressure.
Start the boiler as described in the “OPERATING INSTRUCTIONS”.
Run the boiler for at least an hour. The system pump(s) and all
radiation units must be operated during this time. Ensure that the
make-up water valve is open.
Shut the boiler off and open the bleed valves to purge the air trapped
in the heating system piping. Close the make-up water valve and
check and clean the strainers and make-up water pressure reducing
valve.
Open the make-up water valve and adjust the system pressure if
necessary. The system should be checked and bled after three days
of operation.
