The physical chassis of the RHQA series accommodates varied architectural constraints across residential and multi-family applications. Upflow Configuration
For a unit of this age, this is often the wisest choice. A good technician will have the experience to troubleshoot the system without a manual. They can:
The is a legacy residential air handler and electric heat unit designed primarily to pair with heat pump or standalone fan coil applications. Property owners, HVAC technicians, and property managers frequently search for the Rheem Model NO RHQA 1220T PDF manual to resolve low-voltage wiring issues, replace aged parts, or determine the unit's exact physical footprint and electrical capacities.
The model number acts as a code.
A patented feature in the RHQA-12 and higher models that stages supplemental heat. It limits the KW input to only what is necessary for the current demand, preventing energy waste. rheem model no rhqa 1220t pdf
: Weak register velocity, freezing on evaporator coils, or short-cycling on thermal overloads. Root Causes :
The RHQA series was engineered for long-term thermal efficiency. It is characterized by several specific mechanical components: Specification Details Heat Pump auxiliary or No-Heat Fan Coil Voltage Configuration 208 / 230 Volts AC, Single-Phase, 60 Hz Supplemental Heat 20 kW Electric Heat Strips Metering Device Thermal Expansion Valve (TXV) or Flow Check Piston Cabinet Configuration Multi-positional (Upflow, Downflow, or Horizontal) Core Technology Patented Watt-restrictor power limiter The Patented Watt-Restrictor
If you are looking for a modern equivalent, current Rheem air handlers available at retailers like HomeOwnerAir.com or Buy Comfort Direct include:
If installed in an unconditioned space (like an attic), ensure the unit is properly insulated to prevent "sweating" and property damage. The physical chassis of the RHQA series accommodates
Equipped with removable panels that allow easy access to the motor, blower, and filters for maintenance. Drain Pan:
Understanding the alphanumeric code of your Rheem unit helps clarify its exact design specifications. The breakdown for the is as follows: R : Brand Designation (Rheem) H : Product Category (Air Handler / Electric Furnace)
: Cabinet Width or Blower Size (Corresponds to physical dimensions and nominal CFM output, roughly 1,200 CFM for 3 tons of airflow)
Contains a molded polymer corrosion-resistant condensate drain pan. They can: The is a legacy residential air
For any electrical work or thermostat installation, the is your bible. Many online forums feature users asking for wiring help with their old Rheem RHQA units, a problem that an installation manual can solve instantly. The official unit-specific diagram will be the most accurate you can find, and you can often find it on the inside of the service panel door as well.
You can find comprehensive details, including wiring diagrams and installation steps, in the following resources:
The installation instructions are particularly important for the RHQA series. There is a known need for precise drip pan dimensions for the RHQA air handler. Before searching for a replacement, you should first check your manual to get the original specifications. Using a generic or incorrectly sized pan can lead to water damage.
the RHQA 1220T if it’s over 12–15 years old. New Rheem PTACs (e.g., RQPM series) are more efficient, use R-410A or R-32 refrigerant, and have digital controls with easier-to-find manuals.
Improper pitch on horizontal layouts. The primary drain line must exhibit a minimal downward pitch of toward the final drain outlet. 🧼 Preventative Maintenance Checklist
These air handlers were part of Rheem's RHQA series, which are known to be robust systems, though they are now considered . User experiences and professional discussions suggest many RHQA units are 15 to over 20 years old. Because of this age, finding the original manual and other supporting documentation can be a challenge. The official Rheem website no longer lists or supports this product line, as it has been succeeded by newer series.