The SpacePak air-to-water Solstice Inverter Split (SIS) series utilizes a split type construction. This consists of an outdoor module and an indoor module. Only the outdoor module should be connected to the mBox.
mBox, mBox5 and mBox Maxi
The two designated digital outputs need to be connected to the corresponding terminals on the SpacePak outdoor module:
- 3 & 4 (GND) labeled as Remote On/Off control (close = On) connect to the first DO.
- 5 & 6 (GND) labeled as Remote Heat/Cool control (close = Heat) connect to the second DO.
Please ensure you connect both ground terminal 4 (GND) and 6 (GND) on the SpacePak unit to the common terminals on the mBox, which are colored blue. Neglecting to do so could lead the Heat Pump to operate in unintended heating and cooling modes. (two examples of connection with DO1 & DO2 and with the power relays DO5 and DO6)
mBox10
The three terminals labeled “HP COMMAND”: COM, On/Off, and H/C on the mBox10 need to be connected to the corresponding terminals on the SpacePak outdoor module as follow:
- 4 (GND) & 6 (GND) ground terminals, connect to COM.
- 3, which controls On/Off (close = On), connects to On/Off.
- 5, which controls Heat/Cool (close = Heat), connects to H/C.
Primary circulator wiring (rated 115VAC)
- 11 line terminal (115VAC) located on the 1-12 terminal block.
- N, neutral terminal locatet on the L1-L2-N terminal block.
Always verify the 115V output terminals are correct. Sometimes they may be on different terminals but should be labeled with stickers as to what they are.