Emergency Heat (Heating Heat Pump); Room Thermostat (Anticipator Setting); Calculations; Calculating Temperature Rise - Rheem RHSL-HM1817AA Installation Instructions Manual

9.6 EMERGENCY HEAT (HEATING HEAT PUMP)

• If selector switch on thermostat is set to the emergency heat position, the heat pump
will be locked out of the heating circuit, and all heating will be electric heat. Jumper
should be placed between W
heat control will transfer to the first stage heat on the thermostat. This will allow the
indoor blower to cycle on and off with the electric heat when the fan switch is in the
auto position.

9.7 ROOM THERMOSTAT (ANTICIPATOR SETTING)

See instructions with outdoor section, condensing unit or heat pump for recommended
room thermostats.
• On units with one electric heat sequencer (HR
anticipator setting should be .16.
• On units with two electric heat sequencers (HR
heat anticipator setting should be .32 if both are connected to same stage on thermo-
stat. Setting should be .16 if (HR
NOTE: Some thermostats contain a fixed, non-adjustable heat anticipator. Adjustment
is not permitted.
• The thermostat should be mounted 4 to 5 feet above the floor on an inside wall of the
living room or a hallway that has good air circulation from the other rooms being con-
trolled by the thermostat. It is essential that there be free air circulation at the location
of the same average temperature as other rooms being controlled. Movement of air
should not be obstructed by furniture, doors, draperies, etc. The thermostat should
not be mounted where it will be affected by drafts, hot or cold water pipes or air ducts
in walls, radiant heat from fireplace, lamps, the sun, T.V. or an outside wall. See
instruction sheet packaged with thermostat for mounting and installation instructions.

10.0 CALCULATIONS

10.1 CALCULATING TEMPERATURE RISE

• The formula for calculating air temperature rise for electric resistance heat is:
Temperature Rise °F =
Where: 3.16 = Constant, CFM = Airflow

10.2 CALCULATING BTUH HEATING CAPACITY

• The formula for calculating BTUH heating capacity for electric resistance heat is:
BTUH Heating = Watts x 3.412
Where: 1 kW = 1000 Watts, 3.412 = Btuh/Watt

10.3 CALCULATING AIRFLOW CFM

• The formula for calculating airflow using temperature rise and heating BTUH for units
with electric resistance heat is:
Heating BTUH
CFM =
1.08 x Temp. Rise

10.4 CALCULATING CORRECTION FACTOR

• For correction of electric heat output (kW or BTUH) or temperature rise at voltages
other than rated voltage multiply by the following correction factor:
Correction Factor =
and E on the thermostat sub-base so that the electric
2
) (see wiring diagram on unit), heat
1
& HR ) (see wiring diagram on unit),
1 2
& HR ) are connected to separate stages.
1 2
3.16 x Watts
CFM
2
Applied Voltage
2
Rated Voltage
35