© 2013
400_D - 09/13
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If the Boil Type is 1 Stage, the boiler stage 1 relay is
closed for 10 seconds and then opened.
If the Boil Type is 2 Stage, the boiler stage 1 relay is
closed for 10 seconds, then the boiler stage 2 relay is
closed for 10 seconds and then both relays are opened.
If Boiler Type is modulating 0 - 10, the boiler stage
1 relay is closed for 10 seconds and the modulating
output operates at 50 % [5 V (dc)].
If Boiler Type is modulating 4 - 20, the boiler stage
1 relay is closed for 10 seconds and the modulating
output operates at 50 % (12 mA).
Step 8 Control returns to normal operation.
Testing the Zone Output
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Activate the User Test sequence and pause at Step 1 by
pressing the Item button once Zone 1 turns on. Using an
electrical meter, measure the voltage between the zone
valve and the common (C) terminals. The voltage should
measure between 21.6 V (ac) and 26.4 V (ac). Repeat for
Zones 2, 3, and 4.
Testing the DHW Pump
Activate the User Test sequence and pause at Step 5 by
pressing the Item button once the DHW pump turns on.
Using an electrical meter, measure the voltage between
the DHW pump and a neutral. The voltage should measure
between 103.5 V (ac) and 126.5 V (ac).
Testing the Boiler System Pump
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Activate the User Test sequence and pause at Step 6 by
pressing the Item button once the boiler system pump turns
on. Using an electrical meter, measure the voltage between
the boiler system pump and a neutral. The voltage should
measure between 103.5 V (ac) and 126.5 V (ac).
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Testing the Boiler Stage 1 Contact
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Activate the User Test sequence and pause at Step 7 by
pressing the Item button once the boiler stage 1 turns on.
Using an electrical meter, measure for continuity over the
boiler stage 1 terminals.
Testing the Boiler Stage 2 Contact
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This test applies for 2 stage on-off boilers only.
Activate the User Test sequence and pause at Step 7 by
pressing the Item button once the boiler stage 2 turns on.
Using an electrical meter, measure for continuity over the
boiler stage 2 terminals.
Testing the Boiler Modulating Output
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This test applies for modulating boilers only.
Active the User Test sequence and pause at Step 7 by
pressing the Item button once the boiler stage 1 turns on.
Using an electrical meter, measure for either a 5 V (dc) or
12 mA signal. The Boil Type setting selects whether the
signal is V (dc) or mA.
Testing the DHW Call
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Remove all wires from the DHW Call terminals. The control
display should show no DHW Call. Reconnect wires. Then
apply either a short circuit or 24 V (ac) over the DHW Call
terminals. The control should now show a DHW Call.
Testing the Setpoint Call
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Remove all wires from the Setpoint Call terminals. The
control display should show no Setpoint Call. Reconnect
wires. Then apply either a short circuit or 24 V (ac) over
the Setpoint Call terminals. The control should now show
a Setpoint Call.
The control has a function called Max Heat. In this mode,
the control turns on and operates the system up to the
maximum set temperatures as long as there is a call for
heat. Use this mode to run the circulators during system
start-up and commissioning, purging air from the piping.
This function is useful when drying sheet rock and paint
in the building.
To enable Max Heat, enter the Toolbox Menu and find Max
Heat. Use the up arrow to select ‘On’.
When a space heating call is present, the boiler will
run to maintain a target of Boil 10°F (+ 6°C).
(One can purge the system using this test and leave
the boiler un-powered. This will prevent heat from en-
tering the system during the purge.)
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When a DHW Call or Setpoint Call is present, the
boiler will operate at the DHW exchange or Setpoint
temperature settings.
WWSD and DHW Priority is disabled during Max Heat
mode.
When Max Heat is on the display will show ‘Max Heat
Test’.
Max Heat will automatically turn off after 24 hours.
To Cancel Max Heat, go to Max Heat in the Toolbox menu
and use the down arrow to select ‘Off’.
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Max Heat
