Is this a heat pump system

No. The GLXS3BN3010 / AMST30BU1300 is an air-conditioning (cooling-only) system, not a heat pump. The GLXS3BN3010 is a 2.5-ton AC condenser, while the AMST30BU1300 is the matching multi-position air handler.

If you have any further questions, please call us and we will be happy to assist you.