CADDY PF01015, Installation And Operating Instructions Manual

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16.5.1. DISTRIBUTION FAN SPEEDS
Your furnace is equipped with a 4-speed blower. Using the central processing unit, we have created 6 functional
speeds. Refer to the following table for the various speed configurations.
SPEED CORRESPONDING DATA CFM*
STATIC
PRESSURE
1 Blower speed #1 using 90V
900
0.2’’ W.C.
2 Blower speed #1 using 115V
1135
0.2’’ W.C.
3 Blower speed #2 using 98V 1400 0.2’’ W.C.
4 Blower speed #2 using 115V 1685 0.2’’ W.C.
5 Blower speed #3 using 115V 1790 0.2’’ W.C.
6 Blower speed #4 using 115V 1900 0.2’’ W.C.
*These results were measured at exit of plenum during laboratory tests. Results may vary depending of the
configuration and installation.
16.6. SYSTEM BALANCING
It is important to call upon a professional installer for the installation of the furnace and the ducting system
configuration. Certain check-ups must be performed and certain rules must be respected in order not to damage the
blower.
When all components are installed on the furnace and the ducting system is connected to the various rooms of the
house, you must balance the ducting system. In order to do so, start the distribution blower by going in the
‘’TROUBLESHOOT LINK’’ menu on Page 5 and select speed #4.
It is important to respect the velocity in the main duct, the secondary ducts, as well as the velocity at the room outlets.
The static pressure of your system must be adjusted to at least 0.2 IN.W.C. and must not exceed 0.5 IN.W.C. Finally,
make sure that you never exceed the maximum blower current.
16.7. OPERATING INSTRUCTIONS
16.7.1. HEAT Mode
When the temperature in your house is below the value at which your wall thermostat is programmed, a signal is sent
to your furnace through the PC board, activating the motorized damper located in front of the furnace and thus allowing
more oxygen to the fire. The RTD temperature probe, located inside the hot air plenum of your furnace, reads the
plenum temperature continuously. When the temperature reaches the start-up value selected by the user (KIP –
Kick-
in Point
), the distribution blower starts functioning at the minimum speed. Thereafter, the blower increments its speed
until it reaches the best efficiency point (BEP) determined by the manufacturer. If the temperature inside the hot air
plenum exceeds the limit determined by the manufacturer, the blower automatically selects the maximal speed and the
motorized damper closes in order to slow down combustion. When the temperature returns to a safe level, the blower
speed gradually returns to the speed required to maintain the BEP.