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Accel CS Boiler - Gas Heat - Eighth Edition – January, 2015
46
TROUBLESHOOTING WITH THE ENERGY MANAGER
Does the Sola Control need to be reset?
YES: Troubleshoot as standard burner lockout.
NO:
Did homeowner reset control?
YES: Troubleshoot as standard burner lockout.
NO: Reset Manager. Run through standard heat cycle.
Does boiler supply and return heat up properly?
NO:
Check boiler circulator. Possible closed or blocked zone.
YES: Intermittent problem. Check low voltage 24vac wiring for tightness from Manager to the Sola control.
ACCEL CS OPERATION WITHOUT AN OPERATIONAL CONDENSING ENERGY MANAGER
Background:
The condensing energy manager communicates with the Honeywell Sola boiler control to operate circulators
and to operate a heat demand. Domestic hot water (DHW) is operated with a central heat (CH) demand to the Sola, and
priority is set at the manager. The Sola has separate CH demand and DHW demand connections (even though the
Manager does not use the Sola DHW connection). Note: The Accel CS Condensing Energy Manager method of
communication with the Sola is different enough that inserting a System 2000 service board will not allow proper function.
Here’s how to provide temporary or emergency heat and hot water without a Condensing Energy Manager and with an
operational Sola boiler control:
For temporary heat
: Turn the Accel CS power off and disconnect both right and left quick connects from the Manager.
Choose a master thermostat to control the heat in the home. Temporarily wire this thermostat to the Sola heat demand
input by connecting the two thermostat wires to the B1 and B2 terminals on the right hand quick connect. Manually open all
zone valves for zones requiring heat. Leave the quick connectors disconnected until a new Manager is available and you
are ready to restore the wiring. Double check all wiring connections and turn the Accel CS power on. The Accel CS will
only run when there is an active heat call from this master thermostat.
For temporary domestic hot water
: Turn the Accel CS power off and disconnect both right and left quick connects from
the Manager. Connect the tank thermostat wires (THW, A1) directly to the Sola DHW demand terminals as follows:
Remove connecter J9 from the Sola and wire the tank thermostat wires to Pin 1 and Pin 2 on J9 – see diagram below.
Replace connecter J9. The Sola DHW demand connection is programmed for a 4 minute boiler preheat delay before
making domestic hot water by turning on the smart pump relay. To make domestic hot water, turn off the master heating
thermostat that was connected for temporary heat, close all heating zone valves (so the house is not simultaneously
heated), and manually open the domestic hot water zone valve. Turn the Accel CS power on and wait until the domestic
hot water tank is heated and the tank thermostat is satisfied. Turn the Accel CS power off, disconnect the domestic hot
water thermostat at the tank or at terminal J9, and close the domestic hot water zone valve. Turn the Accel CS power on
and restore temporary heat by first opening the heating zone valves and then turning the master thermostat up to the
desired temperature.
Note: If the heating zones are not manually closed, domestic hot water temperature quality may still
be adequate, depending on radiation temperature.
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