SUPREME FEM15-E230V1M-A, Руководство пользователя

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9
FIGURE 8
Manual Furnace Controls
3.3 OPERATING SEQUENCE
This unit is designed to provide the required airflow in order to
match with any of four (4) different electronic heat capacity, air
conditioner or heat pump outdoor unit sizes (see Tables 3 and 4
for CFM values).
Also, the blower motor is a true variable speed motor designed
to deliver constant CFM. Constant CFM is valid for systems
with total external static pressure between 0.1 and 0.7 inches
water column.
Refer also to Table 1 for sequence of operation summary,
depending on thermostat inputs and types.
3.3.1.
Continuous fan
•
Thermostat closes circuit R to G.
•
Blower runs at continuous fan airflow.
3.3.2.
Cooling mode – single stage
•
If indoor temperature is above temperature set point
and humidity is below humidity set point, thermostat
closes circuits R to G, R to Y/Y2 and R to O.
NOTE: For single stage systems, do not use the Y1 terminal.
•
Furnace delivers single stage cooling airflow.
3.3.3.
Cooling mode – two stage
•
First stage (low) cooling: Thermostat closes circuits R
to G, R to O, and R to Y1.
•
Furnace delivers low stage cooling airflow.
•
Second stage (high) cooling: Thermostat closes
circuits R to G, R to O, R to Y1 and R to Y/Y2.
•
Furnace delivers high stage cooling airflow.
3.3.4.
Cooling mode – dehumidification
NOTE: Remove jumper « J1 » on board to activate this function.
(Refer to Figures 4 and 9)
•
If indoor temperature is above temperature set point
and humidity is above humidity set point, thermostat
closes circuits R to G, R to Y/Y2 and R to O and
humidistat opens circuit R to DH.
•
The furnace delivers airflow which is approximately
80% of the nominal cooling airflow to increase the
latent capacity of the system.
3.3.5.
Electric heat heating mode – 1 stage
•
Thermostat closes circuit R to W1 or W2.
•
Furnace delivers the selected electric heat airflow and
maximum heating capacity Is powered within a
maximum delay of 8 seconds.
3.3.6.
Electric heat heating mode – 2 stage
NOTE: Remove jumper « J2 » on board to activate this function.
(Refer to Figures 4 and 9)
•
First stage heating: thermostat closes circuit R to W1.
•
Furnace delivers low stage heating airflow (50% of
nominal electric heating airflow) and approximately half
of the heating capacity is powered in a 5 seconds
delay.
•
Second stage heating: thermostat closes circuit R to
W2.
•
Furnace delivers high stage heating airflow (100% of
nominal electric heating airflow) and maximum heating
capacity is powered within a maximum delay of 8
seconds.
3.3.7.
Heat pump heating mode – single stage
•
Thermostat closes circuits R to G and R to Y/Y2.
NOTE: For single stage systems, do not use the Y1 terminal.
•
Furnace delivers single stage heat pump heating
airflow.
3.3.8.
Heat pump heating mode – two stage
•
First stage (low) heating: Thermostat closes circuits R
to G and R to Y1.
•
Furnace delivers low stage heating airflow.
•
Second stage (high) heating: Thermostat closes R to
G, R to Y1 and R to Y/Y2.
•
Furnace delivers high stage heating airflow.
WARNING
ELECTRICAL SHOCK or UNIT DAMAGE HAZARD
Failure to carefully read and follow this WARNING
could result in equipment malfunction, property
damage, personal injury and/or death.
Disconnect power to unit before removing or
replacing connectors or servicing motor. Wait at
least five (5) minutes after disconnecting power
before handling.
3.4 AIRFLOW VERIFICATION
Verify the airflow by taking readings of the following points,
while the elements are in the heating mode:
•
Total amperage of all the heating elements;
•
Voltage at the furnace;
•
Supply air temperature. The point of the reading must
not be affected by radiant heat from the elements;
•
Return air temperature.