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dry contact, hook-up the main thermostat (wood) to the WOOD MECH port on the pellet central processing unit
(Pellet CPU). If the thermostats send a 24 volt signal to the appliance, hook-up the main thermostat (wood) to the
WOOD 24V port on the pellet central processing unit (Pellet CPU). For the 24 volt thermostat, a 24VAC port is
designed on the pellet central processing unit (Pellet CPU) (see electric diagram).
Combination pellet-electric
The combination model uses two thermostats which must be located at the same height from the floor. If the main
thermostat (pellet) calls for heat and that demand is not satisfied with the energy supplied by the pellet, the optional
heating unit (electrical element) will take over and will maintain the home's temperature at the setting programmed
on the second thermostat (e.g. the option's thermostat). The main thermostat must be connected to the "WOOD
MECH" port on the pellet central processing unit (Pellet CPU). The electric option's thermostat must be connected
to the "USER MECH" port on the pellet central processing unit (Pellet CPU). The "WOOD24VAC" & "USER24VAC"
ports are only necessary when connecting an external appliance that shares the furnace blower (example : AC, heat
pump). For the 24 volt thermostat, a 24VAC port is designed on the pellet central processing unit (Pellet CPU) (see
electric diagram).
2.13
FAN CONTROL
We recommend that the HEAT mode be programmed for the Caddy Alterna (this is done with the pellet central
processing unit (Pellet CPU)). Under the HEAT mode, the distribution blower uses various speeds that are controlled
by the pellet central processing unit (Pellet CPU) based on the hot air plenum temperature.
temperature is read by the RTD temperature probe. The manufacturer's programmed settings should provide the
most efficient operation for a majority of installations. The pellet central processing unit (Pellet CPU) also has a
manual mode ("MANU" – consult the MODES section of this manual). Under the manual mode, the Caddy Alterna
operates as a conventional furnace. That is, the distribution blower starts at the speed programmed in the pellet
central processing unit (Pellet CPU) (one single speed) based on only one temperature point read by the RTD probe
inside the hot air plenum.
The adjustment of all controls must be performed by a qualified technician. In order to obtain a continuous air
circulation during summer, you simply need to change the pellet central processing unit (Pellet CPU) modes to
"CIRC". To do so, consult the MODES section of this manual.
It is not recommended to let the blower run on the continuous mode when heating with pellet since the
pellet furnace must reach a certain temperature before the blower starts in order to operate efficiently.
2.14
INSTALLATION OF AN AIR CONDITIONING UNIT
The Caddy Alterna pellet furnace has been tested with an optional air conditioning unit. If this option is chosen, we
recommend an installation as per the graphic provided below. This installation will provide the most efficient and
safe operation of the air conditioning unit using the distribution blower of the Caddy Alterna furnace during summer.
In order to complete the installation of an air conditioning unit, the main thermostat must be a "heat/cool" type.
Furthermore, the pellet central processing unit (Pellet CPU) of the furnace must be in a COOL mode and the desired
distribution blower speed must be programmed (see MODES section for complete instructions). It must be noted
that upon thermostatic demand for cooling, the distribution blower will start immediately.
The capacity and characteristics of the air conditioning unit that has been tested for the Caddy Alterna are stated
below. The use of another brand with similar capacity and characteristics is adequate.
Condenser brand: Goodman GSX13036
Capacity: 4 ton
Coil type: Type A, CAUF (uncased indoor coil).
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The plenum
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