Tekmar Smart Heat Pump Control Expansion 291EXP

Tekmar Smart Heat Pump Control Expansion 291EXP Four-Heat-Pump Expansion Module The Tekmar Smart Heat Pump Control Expansion 291EXP expands a Tekmar Smart Heat Pump Control 291 system by adding control for 4 additional heat pumps. Designed for larger hydronic heating and cooling systems, each 291EXP connects to the main 291 control through a wired expansion bus and can be configured for heat pump groups 5-8, 9-12, or 13-16. Key Benefits System Expansion: Adds 4 additional heat pumps to a Tekmar Smart Heat Pump Control 291 system. Up to 16 Heat Pumps: Use multiple 291EXP modules to expand the full system up to 16 total heat pumps. Simple Expansion Bus: Connects to the main 291 control through a wired 3-conductor expansion connection. Configurable Heat Pump Groups: DIP switches assign the module to heat pumps 5-8, 9-12, or 13-16. Heating and Cooling Outputs: Supports compressor and reversing valve control, or separate heat and cool enable inputs. 4-Pipe Valve Support: Includes diverting valve outputs for directing flow to hot or cold buffer tanks in 4-pipe systems. Service-Friendly Status LEDs: Power, communication, heating, and cooling LEDs help verify operation and simplify troubleshooting. Specifications Application: Heat pump expansion module for Tekmar Smart Heat Pump Control 291 systems Expansion Capacity: Adds 4 heat pump stages per module Supported Groups: Heat pumps 5-8, 9-12, or 13-16 using DIP switch configuration Expansion Connection: 3-wire connection to the Smart Heat Pump Control 291; maximum bus length 100 ft using 18 AWG solid conductor cable Dimensions: 9 in H x 8 in W x 2 11/16 in D Packaged Weight: 2.4 lb Power Supply: 115 V(ac) +/-10%, 60 Hz, 6 W Staging Relays: 230 V(ac), 5 A, 1/10 hp Calls: 24 V(ac) or short Enclosure: Blue ABS plastic, NEMA type 1 Ambient Conditions: Indoor use only, 32°F to 122°F, less than 90% RH non-condensing Approvals: CSA C US, FCC Part 15B, CAN ICES-3(B)/NMB-3(B) Warranty: Limited 3 year