21
STARTUP AND SEASONAL MAINTENANCE
Use qualied service agency for annual inspection of
boiler and heating system.
Placing Hydronic block into service.
1.
Verify hydronic block circuit breaker or switch at service
entrance and hydronic block circuit breakers within unit
are in "Off" position.
NOTICE
Only propylene glycol can be used in heating system
to prevent freezing. Recommendation is maximum
40% or less propylene glycol mixture to ensure
proper operation of electric boiler.
2.
Fill heating system with water until pressure is 10-15
PSIG. Check for leaks, repair if necessary, purge all air
from system.
NOTICE
Failure to vent and keep air out of heating system
will result in damage to heating elements in hydronic
block. Damage due to element dry re is not covered
by manufacturer's warranty.
3.
Set boiler operating temperature to desired heating
water temperature. See Sequence of Operation.
Boiler is equipped with a secondary high-limit
temperature device set at 200° F as safety limit
control. High limit temperature device has automatic
reset function and will reset at 170° F.
4.
Turn on hydronic block circuit breaker at service
entrance and/or disconnect switch and all circuit
breakers on hydronic block.
5.
Set room, thermostat above room temperature.
Circulator pump will now operate.
6.
Check system again for leaks. Allow circulator pump to
run until all air has been vented from system. Gurgling
or rushing sound indicates presence of air. Do no allow
electric elements to re until all air is purged from
system. Reset room thermostat if needed. Re-purge
boiler if necessary.
7.
Hydronic block will start to produce heat. Listen for
air passing through system as water temperature
increases. Water pressure will rise somewhat as
temperature increases - this is normal as long as the
pressure remains less than 25 PSIG.
8.
When thermostat calls for heat, circulator will be
energized and green pump LED will light. Heating
elements are energized with green heating element
LEDs. Once boiler water temperature reaches set point
temperature controller will regulate water temperature
by staging its elements. Number of elements which
stay on is based on heating demand and set point of
boiler water temperature. After all room thermostats
are satised, controller de-energizes elements one after
another, and switches pump off after 3 minutes.
NOTICE
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
service.
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