3
9. Circuit breaker size is 60 amps per
heater circuit and 15 amps for the
circulator pump and control circuit.
The 24 volt control circuit is pro-
tected with a 2 amp ferrule fuse.
10. An opening is provided in the cabi-
net lower right hand corner of the
boiler for input wiring. All wiring
must be in accordance with local
electric code, or the National
Electric Code in the absence of a
local code.
Warning: DISCONNECT ALL
WIRING AT THE MAIN SWITCH
BEFORE WIRING UNIT
11. Connect power to terminals marked
L1 and L2 and the neutral leg of the
three wire service to the terminal
marked N (neutral).
12. Connect a ground wire to the case
ground connection and connect the
ground wire to a ground that meets
local electrical codes. Improper
grounds may result in unsafe con-
ditions and interfere with other
electronic devices.
13. Replace boiler jacket and re-install
assembly screws. Remove the door
holding screw to allow the door to
be opened.
Re-install the door holding screw when
the system is operating to avoid acci-
dental or unintentional opening of the
door.
14. Install the thermostat (not included)
in accordance with the instructions
provided by the manufacturer.
Caution: The Thermostat, ground wire
and power wires are the only connec-
tions that should be made to the TDE.
Do not supply power to any other sys-
tem components from the TDE.
OPERATION
Caution: Follow the start-up procedure
carefully and completely. Failure to fol-
low the start-up procedure may cause
damage to components including the
heater elements.
START-UP
1. Verify that the supply breaker at the
main circuit breaker panel to the
TDE and all of the TDE electrical
breakers are in the off position.
NEVER PUT ELECTRICAL POWER TO
BOILER UNLESS BOILER AND
HYDRONIC SYSTEM ARE
FULL OF WATER.
2. Fill the hydronic system and the
boiler. Purge all air from the system
at the purge valve. If it is a multi-
zone system, air purge each system.
3. Turn the supply breaker in the Main
Circuit panel for 120 volt power to
the TDE to on. Turn the 15 amp
breaker in the TDE to on. DO NOT
ENERGIZE THE HEATER CIRCUITS.
The 15 amp breaker provides power
to the circulator and the controls.
Turn the thermostat up until it turns
the circulator on. If multiple zone
circulators are installed, turn the
zone circulators on. Continue to
vent the system with the circulators
running, until all air is purged.
4. The pressure gauge should read 12
psi if an automatic feed valve is
