Step - Honeywell AQ254 Series Manual

AQ250 SERIES HYDRONIC CONTROL PANELS
SPECIFICATIONS
The AQ250 Control Panels and corresponding attached
equipment are listed in Table 1.
Table 1. AQ250 Series Control Panel Models.
Corresponding
Control Panel Control Module
AQ25042B AQ15000B
AQ25044B AQ15000B
Application: Controls one boiler loop as well as domestic
hot water (DHW) management and zoning operation in
a hydronic zoning system.
Power and Electrical Ratings:
Power Supply: 120 Vac / 60Hz
Auxiliary Pump Contact Rating: 120/250 Vac, 5A,
1/3 HP
Boiler (T-T) Contact Rating: 24 Vac, 0.5A, 12 VA
Boiler Pump Output Rating: 120 Vac, 5A, 1/3 HP
DHW Pump/Valve Output Rating: 120 Vac, 5A, 1/3 HP
B–B Communication Bus Terminals: Low voltage,
Class II, 2-wire polarity-insensitive, digital
communicating link to other Control or Zoning
modules.
Electrical Connections (Line Voltage): Wire-clamp
screw terminals; maximum 2 x 14 AWG each on line
voltage terminals
Environmental Ratings:
Control and Zoning Panel Temperature Rating:
32°F to 130°F (0°C to 55°C)
Operating Humidity Range (% RH): 5 to 90% RH,
non-condensing
68-0306—07
Temperature Ratings:
Corresponding
Inputs/Outputs:
Zoning Module
AQ15540B
AQ15740B
Interface and Timings:
Thermostat Compatibility: Digital thermostats and/or
Supply/Return Loop Sensor: 10K ohm NTC thermistor at
Dimensions (HxWxD):
Weight: 4.9 lb. (2.2 kg)
Approvals: Canadian Standards Association: Certified,
2
Return Minimum Control Temperature: 140°F
(60°C); This is the temperature at which the bypass
pump (Aux. Pump contacts) is activated.
Sensor Temperature Rating:
-58°F to 230°F (-50°C to 110°C)
DHW Demand Input: External dry contacts
connection only
Heat Demand (Thermostat R-W) Input: External dry
contacts connection only
R–C Input (on Control and Zoning Modules):
24 Vac Class II
R–C Output (on transformer): 38 VA, 24 Vac Class II
User Interface: DIP Switch settings
Boiler Heat Post Purge: 30 seconds; not adjustable
Pump/Valve exercise: 30 seconds per 2 weeks of
space heating inactivity; not adjustable
AQ1000 Series 2-wire communicating thermostats
77°F (25°C) ± 0.5°F (±0.3°C). Lead length: 10 ft. (3.0 m);
up to 500 ft. (150 m) using 18 AWG or larger wire,
beta=3892.
8.0 x 13 x 3.3 in. (20.3 x 32.9 x 8.5 cm) approximate
File No. LR76030