Description
The MRCOOL UAH18048-O is the 4-ton multi-position air handler for the Universal Series heat pump systems. It is designed for R-454B and pairs with the UHP18048-O outdoor unit.
The matching UAH air handler installs upflow, downflow, horizontal left or horizontal right, and its narrow cabinet matches the width of most furnaces, which makes furnace-to-heat-pump swaps easier. It runs on 115V or 208/230V with automatic voltage identification, uses an M-shaped all-aluminum coil, a constant-airflow ECM blower and an electronic expansion valve, and it has a built-in refrigerant leak sensor for R-454B. It works with any standard 24V thermostat.
Airflow, electrical and size
Rated airflow is 1601/1442.1/1265.5/1088.9/N/A (Turbo/H/M/L/Si). Without electric heat the air handler draws 14.5/10 A (115V / 208-230V; without heat kit) minimum circuit ampacity with 15 A (without heat kit) maximum overcurrent protection. It takes a 20 x 20 x 1 in filter, uses 3/8 in liquid and 3/4 in suction connections, measures 21.50 x 21.50 x 55.94 in and weighs 186.51 lbs.
Electric heat
Supplemental and emergency heat is added with an MRCOOL UHK heat kit, sold separately. This size accepts the 8 kW, 10 kW, 15 kW, 20 kW kits, which slide into the cabinet and bring their own circuit breakers.
Key Features
- Multi-position: Upflow, downflow, horizontal left or right
- ECM blower: Constant airflow across a wide range of static pressure
- EEV metering: Electronic expansion valve for precise refrigerant control
- Leak detection: Built-in R-454B refrigerant sensor
Frequently Asked Questions
Which outdoor units does this air handler work with?
UHP18048-O. Those are the AHRI-matched pairings for this size.
Which heat kits fit?
The 8 kW, 10 kW, 15 kW, 20 kW MRCOOL UHK kits are approved for this cabinet.
What filter size does it take?
20 x 20 x 1 in.
Can it run on 115V?
Yes. It runs on 115V or 208/230V single phase and identifies the supply voltage automatically. Any heat kit needs its own 208/230V supply circuit.
