PSG CADDY ALTERNA II, Installation And Operating Instructions Manual

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menu. The selected speeds in this menu will be the speeds used in the CIRC mode, the COOL mode and the
HEAT mode.
DISTRIBUTION FAN SPEEDS
Your furnace is equipped with a 4-speed blower. Using the pellet central processing unit (Pellet CPU), we have
created 6 functional speeds. Refer to
Table: Available speeds for the various speed configurations.
Available speeds
SPEED CORRESPONDING DATA CFM*
STATIC
PRESSURE
1 Blower speed #1 using 90V 525 0.2
’’ W.C.
2 Blower speed #1 using 115V 825 0.2
’’ W.C.
3 Blower speed #2 using 98V 900 0.2
’’ W.C.
4 Blower speed #2 using 115V 1000 0.2
’’ W.C.
5 Blower speed #3 using 115V 1200 0.2
’’ W.C.
6 Blower speed #4 using 115V 1300 0.2
’’ W.C.
*These results were measured at exit of plenum during laboratory tests. Results may vary depending of the
configuration and installation.
7.2.5 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 --> Page 4 and select speed #4 (refer to Table 2). 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. Velocity in the main duct should reach at least 700 fpm.
7.2.6 CHOOSING THE INPUT BTU
Your Caddy Alterna II has an input that can reach up to 100,000 BTU. Since the efficiency of the furnace is 82%,
the output can be calculated by multiplying the input by 0.82. In order to reduce cycling of the furnace, the BTU
input can be adjusted by the installer based on the size of the house. There are four selections to choose from.
The factory default BTU is programmed at 50,000 BTU. In order to change the BTU input, press the burn rate
adjustment button on the main page.