HP 5 Microprocessor Control for Mammoth Water Source Heat Pumps Operation and Maintenance Manual Model: Applies to: 71028004 Single Circuit Water-to-Water Twin Circuit Units Without DDC Controls MAMM‐WHSP‐IOM‐1HP5A (October 2011) P/N 71144918
HP 5 Microprocessor Control Important! These instructions are for use by qualified personnel specially trained and experienced in the installation of this type of equipment and related system components. Some states require installation and service personnel to be licensed. Unqualified individuals should not attempt to interpret these instructions or install this equipment. Read these instructions carefully before opening (unpacking), installing and operating this heat pump unit.
FAN OPERATION: On a call for fan operation from the wall thermostat “fan on" switch or from a call for compressor operation, fan operation is delayed for 2 seconds. REVERSING VALVE: On a call for cooling from the wall thermostat, the reversing valve is energized after 4 seconds. Once the cooling demand is satisfied, the reversing valve is held on for 4 seconds before it is de-energized.
manually reset by interrupting power or by removing the call for mechanical heating or cooling. Intelligent reset automatically terminates the lockout mode 5 minutes after a lockout condition occurs. The purpose of intelligent reset is to allow the unit to attempt to reset itself if the condition that caused the original lockout corrects itself.
Figure 1 – Thermostat wiring with night setback/night setup and emergency shutdown Figure 2 – Thermostat wiring with override and night setback MAMM‐WHSP‐IOM‐1HP5A (October 2011) 5
Figure 3 – Thermostat wiring emergency shutdown mode with override Figure 4 – Thermostat wiring emergency shutdown mode without override MAMM‐WHSP‐IOM‐1HP5A (October 2011) 6
Figure 5 – Typical unit wiring MAMM‐WHSP‐IOM‐1HP5A (October 2011) 7
Testing FIELD TEST MODE If the two 'TEST" quick connect terminals are connected, there will be no random start delay, no anti-short cycle delay, and no power to delay present. The normal fan, reversing valve, and compressor on delays of two, four, and six seconds will still be present, as well as the four second reversing off delay. FACTORY TEST MODE The factory mode is entered by applying the correct combination of inputs to the control at power up.
