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Johnson Controls A350S Electronic Temperature Reset Module (Without Relay)

Electronic Temperature Reset Module (Without Relay)
A350S

The A350S Reset Module is designed to raise or lower the setpoint of supply water or supply air temperature based upon a proportionate change in temperature at the master sensor. The A350S has no relay output and must be used with S350 Stage Modules to operate the equipment. As with all System 350 products, the A350S is housed in a NEMA 1, high-impact plastic enclosure. The modular design provides easy, plug-together connections for quick installation and future expandability.

• modular design enables stage, display, and transformer modules to be purchased and installed as necessary
• plug-together connectors and 35 mm DIN rail mountability eliminate wiring between modules and reduce installation costs
• field-selectable reset direction works in direct or reverse reset applications
• adjustable reset ratio adapts to a variety of weather zones and to the specific heat loss characteristics of most buildings
• adjustable master reset setpoint (M.R.S.) enables the user to select a master (outdoor) sensor temperature starting point for the supply reset ramp
• adjustable minimum and maximum supply temperature permits compliance with equipment manufacturer’s specifications

Select a link under the "item" tab below to order.

Cat #DescriptionsType
A350SS-1CA350S Temperature Reset ModuleReset ratio adjustable from 1:5 to 10:1
A350SS-2CA350S Temperature Reset ModuleReset ratio adjustable from 1:30 to 1:1
D350AA-1CDisplay ModuleFahrenheit Scale
D350BA-1CDisplay ModuleCelsius Scale
S350AA-1COn-Off Stage ModuleFahrenheit Scale
S350AB-1COn-Off Stage ModuleCelsius Scale
S350CC-1CSlave Stage ModuleDual Scale (°F and °C)
S350PQ-1CProportional Stage ModuleDual Scale (°F and °C)
Y350R-1CPower Module120/240 VAC, 50/60 Hz input; rectified 24V Class 2 output
A99BB-300CTemperature SensorsPTC silicon sensor with PVC cable; cable length 9-3/4 ft (3m)
A99BC-25C ¹Temperature SensorsPTC silicon sensor with high temp. silicon cable; cable length 9-3/4 in. (0.25 m)
A99BC-300C ¹Temperature SensorsPTC silicon sensor with high temp. silicon cable; cable length 9-3/4 ft (3 m)
A99BC-500CTemperature SensorsPTC silicon sensor with high temp. silicon cable; cable length 16-3/8 ft (5 m)
A99BC-1500CTemperature SensorsPTC silicon sensor with high temp. silicon cable; cable length 49 ft (15 m)
BOX10A-600R ¹EnclosurePVC Sensor Enclosure
WEL11A-601RImmersion WellFor liquid sensing applications
TE-6001-1Duct Temperature Element HolderElement holder with hardware for mounting in a duct
TE-6001-4Room Temperature Element HolderElement holder with hardware for mounting in a room
T-4000-2139CoverCover for room temperature element holder
SHL10A-603RSun ShieldFor use with outside sensors in sunny locations
BKT287-1RDIN Rail Sections35 x 7.5 mm, 12 in./0.305 m long
BKT287-2RDIN Rail Sections35 x 7.5 mm, 36 in./0.914 m long
PLT344-1RDIN Rail End ClampsTwo end clamps
WHA29A-600R ²Cable for Remote Mounting of D350 Display Module3 ft (0.9 m)
WHA29A-603RCable for Remote Mounting of D350 Display Module25 ft (7.6 m)
WHA29A-604RCable for Remote Mounting of D350 Display Module50 ft (15.2 m)
Supply Voltage: Transformer 20 to 30 VAC, Class 2, 50/60 Hz
Y350R 120/240 VAC, 50/60 Hz
Power Consumption: 2.5 VA maximum
Ambient Temperature: Operating -30 to 150°F/-34 to 66°C
Shipping -40 to 185°F/-40 to 85°C
Humidity: 0 to 95% RH non-condensing, 85°F (29°C) maximum dew point
Reset Action: Selectable Reverse or direct acting
Reset Ratio Adjustment Range: A350SS-1C 1:5 to 10:1 (master supply)
A350SS-2C 1:30 to 1:1
Master Reset Setpoint Adjustment Range: 30 to 90°F (-1 to 32°C)
Minimum Supply Temperature Adjustment Range: 35 to 80°F (2 to 27°C)
Maximum Supply Temperature Adjustment Range: 45 to 140°F (7 to 60°C)
Case and Cover Material: NEMA 1, high-impact thermoplastic
Agency Listing: UL Guide No. XAPX and cUL Guide No. XAPX7, File E27734


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