Honeywell AQ25A Series Technical Reference Booklet page 139

Menu Option
BOILER OPERATION
CYCLES/HOUR 2 to 6
FIRE DELAY 0 seconds to 3 minutes
(in 5 second increments)
PURGE TIME OFF, 10 seconds to
30 minutes
(in 10 second increments)
EXERCISE YES / NO
FREEZE PROT YES / NO
10V MOD. SELECT Operating settings for the analog 0-10V (2-10V) modulating signal
10V MOD 0-10V / 2-10V
USAGE NONE / MIX. INJ. / BOILER
SECONDARY LOOP Settings which the AQ252 uses for Secondary loop operation
MIX HIGH - -
80°F to 210°F (27°C to 99°C)
SECONDARY LOOP (continued)
MIX LOW - -
35°F to 150°F (2°C to 66°C)
MIX DESIGN 70ºF to 210ºF (21ºC to 99ºC)
INJECT. ENABLE / DISABLE
MIX.VLV ENABLE / DISABLE
MIX.V.TTO 5 to 230 seconds
(in 5 second increments)
MIX.V.ACT DIRECT / REVRSE
Table 6. Installer Menu – Equipment Setup. (Continued)
EQUIPMENT SETUP
Factory
Range Default
4
10
(seconds)
30
(seconds)
YES
YES
0-10V
NONE
140°F
(60°C)
- -
(disabled)
120°F
(49°C)
ENABLE
DISABLE
160
(seconds)
DIRECT
33
AQ252 Universal Injection/Mixing Boiler Reset Control Panels
Description
The number of heating cycles per hour that the control will
operate the boiler.
Time period that AQ252 control expects between closing
the T-T relay and the boiler firing up. Referring to the
boiler's instruction manual, set this value equal to the
boiler's pre-purge time, if available for the boiler.
Length of time the Boiler pump (or Boiler pump plus zone
valve) will continue to operate (remain open) after the
boiler stops firing. Adjustable from 10 seconds to
30 minutes or OFF.
Option can be set to YES or NO. When set to YES, all
pumps and valves in the system are energized for
30 seconds, following a period of 2 weeks of no zone
equipment activity. The boiler is not fired during this
operation.
Option can be set to YES or NO. When set to YES, all
pumps and valves in the system are energized for
4 minutes every hour. The boiler is operated at high fire
during this operation.
The analog signal provided by the control to the mixing
valve or variable speed pump is proportional to the degree
of opening of the valve or the speed of the pump. It is
opened fully at 10V and closed fully at either 0V or 2V,
depending on the setting chosen. The pump is running at
maximum speed at 10V and completely stopped at 0V or
2V.
This setting assigns the device which the analog signal will
drive. The NONE option disables a signal from the 10V
output.
Maximum temperature that the control can use as a target
for the secondary loop supply water. The MIX HIGH cannot
be set below the MIX LOW setting.
• "- -" means Off (not used).
Minimum temperature that the control can use as a target
for the secondary loop supply water. The MIX LOW cannot
be set above the MIX HIGH setting.
• "- -" means Off (not used).
The supply water temperature required in the secondary
loop when the outdoor temperature is at the OUTDOOR
LOW temperature.
Enables or disables the INJECTION pump output.
Enables or disables the Floating Action valve output
Time required for the motorized mixing valve to fully open.
NOTE: This option is available only when the FLOAT
option for MIX.DEVICE is selected.
Assigns the polarity of the Mixing Valve's action: Direct or
Reverse. This feature is very useful in the event that the
Mixing Valve has been installed backwards.
NOTE: This option is available only when the FLOAT
option for MIX.DEVICE is selected.
69-1986—02