Issue
A McQuay MicroTech 2000 water source heat pump controller may be addressed as a Level 3 device under an MCG (MicroTech Communications Gateway). This can be confusing when addressing WSHP1 blocks in a SIM-MTECH.
Environment
Network 8000 SIM-MTECH
McQuay MCG (MicroTech Communications Gateway)
McQuay MicroTech 2000 water source heat pump controllers
Cause
The MCG needs to use an Echelon communications protocol with the water source heat pump (WSHP)controllers, which uses level 2 internally, and puts the WSHP controllers at LEVEL 3
Resolution
The way to address the WSHP blocks under the MCG is HBYTE = 1, LBYTE = x, where x is the address of the controller. Unlike earlier McQuay controllers where the unit address is set by rotary hexadecimal switches, the addresses of the MicroTech 2000 heat pump controllers are set in software by the McQuay technician who commissions their network.
Click here to see an excerpt from F-26133, Systems Integration Module- MicroTech, SIM-MTECH.
See Fig 2.1, and Table 2.1, pp 2-2 through 2-4
